Jin Ming Koh

Jin Ming Koh
California Institute of Technology | CIT

About

50
Publications
11,565
Reads
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687
Citations
Citations since 2016
48 Research Items
679 Citations
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
Additional affiliations
September 2017 - September 2019
Singapore University of Technology and Design
Position
  • Research Assistant
October 2016 - January 2017
NUS High School of Mathematics and Science
Position
  • Research Coach
July 2016 - November 2016
NUS High School of Mathematics and Science
Position
  • Olympiad Coach
Education
September 2019 - June 2023
California Institute of Technology
Field of study
  • Physics and Computer Science
January 2011 - November 2016
NUS High School of Mathematics and Science
Field of study
  • Honors in Physics, Chemistry and Mathematics, Major in Computing Studies

Publications

Publications (50)
Article
Full-text available
Chiral edge states are highly sought after as paradigmatic topological states relevant to both quantum information processing and dissipationless electron transport. Using superconducting transmon-based quantum computers, we demonstrate chiral topological propagation that is induced by suitably designed interactions, instead of flux or spin-orbit c...
Article
Full-text available
Non-hermiticity presents a vast newly opened territory that harbors new physics and applications such as lasing and sensing. However, only non-Hermitian systems with real eigenenergies are stable, and great efforts have been devoted in designing them through enforcing parity-time (PT) symmetry. In this work, we exploit a lesser-known dynamical mech...
Preprint
Full-text available
Chiral edge states are highly sought-after as paradigmatic topological states relevant to both quantum information processing and dissipationless electron transport. Using superconducting transmon-based quantum computers, we demonstrate chiral topological propagation that is induced by suitably designed interactions, instead of flux or spin-orbit c...
Article
Full-text available
Resolution of the intrinsic conflict between the reproduction of single cells and the homeostasis of a multicellular organism is central to animal biology and has direct impact on aging and cancer. Intercellular competition is indispensable in multicellular organisms because it weeds out senescent cells, thereby increasing the organism's fitness an...
Article
Full-text available
The growing application of Parrondo’s paradox as a model in various ecological settings reveals its extensive relevance in biology and nature. To accommodate the apparent ubiquity of periodicity and quasi-periodicity in natural environments, a recent study proposed a capital-dependent Parrondo model coupled with periodic variations. However, the ab...
Article
Full-text available
Significance Bacteriophages, the most widespread reproducing biological entity on Earth, employ two strategies of virus–host interaction: lysis of the host cell and lysogeny whereby the virus genome integrates into the host genome and propagates vertically with it. We present a population model that reveals an effect known as Parrondo’s paradox in...
Preprint
Ergodic quantum many-body systems undergoing unitary dynamics evolve towards increasingly entangled states characterized by an extensive scaling of entanglement entropy with system volume. At the other extreme, quantum systems repeatedly measured may be stabilized in a measurement eigenstate, a phenomenon known as the quantum Zeno effect. Recently,...
Article
Full-text available
In classical and single-particle settings, non-trivial band topology always gives rise to robust boundary modes. For quantum many-body systems, however, multiple topological fermions are not always able to coexist, since Pauli exclusion prevents additional fermions from occupying the limited number of available topological modes. In this work, we s...
Preprint
Full-text available
Non-hermiticity presents a vast newly opened territory that harbors new physics and applications such as lasing and sensing. However, only non-Hermitian systems with real eigenenergies are stable, and great efforts have been devoted in designing them through enforcing parity-time (PT) symmetry. In this work, we exploit a lesser-known dynamical mech...
Article
Full-text available
Influence maximization in a social network refers to the selection of node sets that support the fastest and broadest propagation of information under a chosen transmission model. The efficient identification of such influence-maximizing groups is an active area of research with diverse practical relevance. Greedy-based methods can provide solution...
Preprint
Full-text available
In classical and single-particle settings, non-trivial band topology always gives rise to robust boundary modes. For quantum many-body systems, however, multiple topological fermions are not always able to coexist, since Pauli exclusion prevents additional fermions from occupying the limited number of available topological modes. In this work, we s...
Article
Full-text available
In game theory, Parrondo's paradox describes the possibility of achieving winning outcomes by alternating between losing strategies. The framework had been conceptualized from a physical phenomenon termed flashing Brownian ratchets, but has since been useful in understanding a broad range of phenomena in the physical and life sciences, including th...
Article
In the design of functionally graded materials, bi-directional design offers greater design freedom than the typical single-direction approach. This paper studies the shape and size design of variable-thickness bi-directional functionally graded plates (2D-FGPs) with multi-objective optimization. A method integrating generalized iso-geometrical ana...
Article
Recent studies suggest that the tetracycline antibiotic minocycline, or its cousins, hold therapeutic potential for affective and psychotic disorders. This is proposed on the basis of a direct effect on microglia‐mediated frontocortical synaptic pruning (FSP) during adolescence, perhaps in genetically susceptible individuals harboring risk alleles...
Article
Recently, a population model has been analyzed using the framework of Parrondo’s paradox to explain how behavior-switching organisms can achieve long-term survival, despite each behavior individually resulting in extinction. By incorporating environmental noise, the model has been shown to be robust to natural variations. Apart from the role of noi...
Article
In response to the transboundary haze problem in Southeast Asia, a physical model is adopted to simulate the spread and extinguishing of fire. This study is done in the context of Dumai, Indonesia, as it is one of the areas that significantly contribute to the haze problem. This model aims to provide perspectives on the persistence of forest fires...
Article
Full-text available
Many predators produce dormant offspring to escape harsh environmental conditions, but the evolutionary stability of this adaptation has not been fully explored. Like seed banks in plants, dormancy provides a stable competitive advantage when seasonal variations occur, because the persistence of dormant forms under harsh conditions compensates for...
Article
Full-text available
In this paper, a co-evolution method of game dynamics and network structure is adopted to demonstrate that neighboring niches of an individual or population may have great influence in determining lifestyle adoption. The model encompasses network structure evolution, denoted CaseA, and pure games participated in by individuals in the network with t...
Preprint
The Parrondo's paradox is a counterintuitive phenomenon in which individually losing strategies, canonically termed game A and game B, are combined to produce winning outcomes. In this paper, a co-evolution of game dynamics and network structure is adopted to study adaptability and survivability in multi-agent dynamics. The model includes action A,...
Article
Full-text available
Data centers are mission-critical infrastructures. There are strict service level requirements and standards imposed on operators and maintainers to ensure reliable run-the-clock operation. In the context of thermal management and data hall environmental control, the formation of hot and cold spots around server cabinets are especially undesirable,...
Article
Full-text available
A minimalistic multi-agent Parrondo’s game structure with branching dependent on local capital spread was previously introduced, indicating that stochastically mixing two losing games can produce winning outcomes with bounded capital variance among players. Using a similar game structure, we unveil further intriguing behavior that a bias toward sel...
Article
Full-text available
Air pollution has emerged as one of the world's largest environmental health threats, with various studies demonstrating associations between exposure to air pollution and respiratory and cardiovascular diseases. Regional air quality in Southeast Asia has been seasonally affected by the transboundary haze problem, which has often been the result of...
Article
Thermal and visual comfort are important for the health and productivity of occupants in office buildings. In this paper, we present a simulation-aided approach in analyzing and optimizing lighting and thermal conditions in building interiors, encompassing the modelling of the interior space in virtual facilities, ray-tracing simulations for illumi...
Article
Fluid-filled shells are near-ubiquitous in natural and engineered structures-a familiar example is that of glass harps comprising partially filled wineglasses or glass bowls, whose acoustic properties are readily noticeable. Existing theories modelling the mechanical properties of such systems under vibrational load either vastly simplify shell geo...
Article
Full-text available
We present an efficient and scalable system to predict emergency department (ED) patient volume in hospitals using publicly available Google Trends search data. Search volume data is retrieved for a selected set of context-relevant query keywords with refinements, on which a series of correlation analyses is performed, and a multiple regression pre...
Article
Classical refractors require at least two lenses, an objective and an eyepiece, to achieve image magnification and focusing. In this study, a minimalistic telescope design consisting of a single lens and a small aperture (the single-lens telescope) is examined. The design exploits the angular limiting properties of the aperture to achieve approxima...
Article
Despite the major roles played by genetic recombination in ecoevolutionary processes, limited progress has been made in analyzing realistic recombination models to date, due largely to the complexity of the associated mechanisms and the strongly nonlinear nature of the dynamical differential systems. In this paper, we consider a many-loci genomic m...
Article
Parrondo's paradox, in which losing strategies can be combined to produce winning outcomes, has received much attention in mathematics and the physical sciences; a plethora of exciting applications has also been found in biology at an astounding pace. In this review paper, the authors examine a large range of recent developments of Parrondo's parad...
Article
Recent waves of controversies surrounding genetic engineering have spilled into popular science in Twitter battles between reputable scientists and their followers. Here, a cautionary perspective on the possible blind spots and risks of CRISPR and related biotechnologies is presented, focusing in particular on the stochastic nature of cellular cont...
Article
Full-text available
Parrondo’s games to date have largely focused on the dynamics of capital mean, and not capital spread—the potential of the framework in modelling ecological and socioeconomic sustainability and inequality has thus been ignored. Based on behavioural heuristics of distinct individualistic and multipartite interactive strategies, we introduce a novel...
Article
Full-text available
The dynamics of a spherical pendulum with a horizontally rotating support, exhibiting regimes of intriguing lagging behaviour in the presence of aerodynamic drag, is analysed in the present study. The dynamic equilibria of the pendulum are derived through both numerical and analytical means, with excellent experiment agreement across key system par...
Article
Not all workable spectrometer systems can be represented by an exact analytical field; furthermore, while traditional design methods typically involve approximating known analytical fields with appropriate electrode/magnet configurations, modern simulation-based approaches do away with analytical representations altogether. Nonetheless, analytical...
Article
Full-text available
The advent of social media and technologies augmenting social communication has dramatically amplified the role of rumour spreading in shaping society, via means of misinformation and fact distortion. Existing research commonly utilize contagion mechanisms, statistical mechanics frameworks, or complex-network opinion dynamics models. In this paper,...
Article
Full-text available
Background Prior studies have demonstrated correlations between air pollution and cardiovascular deaths. This study specifically investigates the association between air pollution and acute myocardial infarction (AMI) incidence in Singapore, a Southeast Asian city exposed to seasonal transboundary haze. Methods A time-stratified case-crossover stu...
Article
Advancements in computational tools have driven increasingly automated, simulation-centric approaches in the design and optimization of spectroscopic electron-optical systems. These augmented methodologies accelerate the optimization process, and can yield better-performing instruments. While classical gradient-based methods had been explored, mode...
Article
We remark on Nelson and Masel’s (2017, 2018) papers [Intercellular competition and the inevitability of multicellular aging, Proc. Natl. Acad. Sci. USA114 (2017) 12982–12987; Reply to Cheong et al.: Unicellular survival precludes Parrondo’s paradox, Proc. Natl. Acad. Sci. USA115 (2018) E5260, doi:10.1073/pnas.1806709115], addressing the connection...
Article
Full-text available
The subject of probability and statistics is easily dismissed by students as assemblages of formulae to be rote-memorized. We propose here an integration of simulation-based activities with certain mathematical paradoxes using patchwork assessment to first-year undergraduates, such that they can better appreciate the real-world context of probabili...
Article
Full-text available
Video surveillance is gaining popularity in numerous applications, including facility management, traffic monitoring, crowd analysis, and urban security. Despite the increasing demand for closed-circuit television (CCTV) and related infrastructure in public spaces, there remains a notable lack of readily-deployable automated surveillance systems. I...
Article
Full-text available
Abstract When imaging bright light sources, rays of light emanating from their centres are commonly observed; this ubiquitous phenomenon is known as the starburst effect. The prediction and characterization of starburst patterns formed by extended sources have been neglected to date. In the present study, we propose a novel trichromatic computation...
Article
Full-text available
In the present study, we present a virtual learning laboratory environment for undergraduate mathematics education using an inquiry-based learning approach. The Visible Thinking pedagogical framework is also suggested to achieve a good complement to traditional lecture-tutorial systems. The virtual laboratory is implemented in an open-access Java i...
Article
Full-text available
Previously, we developed a population model incorporating the Allee effect and periodic environmental fluctuations, in which organisms alternate between nomadic and colonial behaviours. This switching strategy is regulated by biological clocks and the abundance of environmental resources, and can lead to population persistence despite both behaviou...
Article
The Crow-Kimura model is commonly used in the modeling of genetic evolution in the presence of mutations and associated selection pressures. We consider a modified version of the Crow-Kimura model, in which population sizes are not fixed and Allee saturation effects are present. We demonstrate the evolutionary dynamics in this system through an ana...
Article
In the current study, we demonstrate an automated optimization method based on the Levenberg–Marquardt algorithm for electron-optical systems, incorporating an adaptive merit function switching process that enhances minimization convergence. The algorithm is successfully applied to three energy spectrometer designs—a radial mirror analyzer, a paral...
Conference Paper
Recent years have witnessed the proliferation of worldwide efforts towards developing technologies for enabling smart cities, to improve the quality of life for citizens. These smart city solutions are typically deployed across large spatial regions over long time scales, generating massive volumes of data. An efficient way of data retrieval is thu...
Conference Paper
Full-text available
We design and implement an Android application, Sensorem, for efficient retrieval and visualization of wireless sensor network (WSN) data. In light of data distribution and visualization being important developmental keystones of smart cities, we seek to enhance sensor data accessibility by developing a user-friendly mobile application (Sensorem) f...

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