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1. Quantifying Resilience in Single-Host/Single-Virus Infections

   https://doi.org/10.3390/applmicrobiol5010018  

   Hour, Socheata; Pierce, Andrew; Heng, Sobroney Ying; Plymale, Ruth; Ceballos, Ruben Michael (March 2025, Applied Microbiology)

   Due to theoretical and practical applications in biomedical, environmental, and industrial microbiology, robust metrics for quantifying the virulence of pathogens is vital. For many virus–host systems, multiple virus strains propagate through host populations. Each strain may exhibit a different virulence level. Likewise, different hosts may manifest different levels of host resilience to infection by a given virus. Recent publications have assessed metrics for quantifying virulence (VR) from growth curve data. Regardless of the metric used, a feature that most methods have in common is focus on the exponential growth phase of virus–host interactions. Often ignored is mortality phase. Following a report introducing the Stacy–Ceballos Inhibition Index (ISC), a robust metric to quantify relative virulence (VR) between viruses, we have turned attention to quantifying relative resilience (RR) between hosts in single-virus/single-host (SVSH) experimental infections. Although resilience during viral infection impacts the entire host growth curve, RR has particular biological significance during the mortality phase. In this report, we argue that calculating RR using a modified ISC provides a robust metric for comparisons between SVSH infections. Wet lab data from fusellovirus infections in Sulfolobales, bacteriophage infections in Mycobacteriales, and simulated infected-host growth profiles form the basis for developing this metric, RR, for quantifying resilience. 

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2. Single-Electron Currents in Designer Single-Cluster Devices

   https://doi.org/10.1021/jacs.0c04970  

   Gunasekaran, Suman; Reed, Douglas A.; Paley, Daniel W.; Bartholomew, Amymarie K.; Venkataraman, Latha; Steigerwald, Michael L.; Roy, Xavier; Nuckolls, Colin (September 2020, Journal of the American Chemical Society)

   null (Ed.)
3. Single shot single antenna path discovery in THz networks

   https://doi.org/10.1145/3372224.3380895  

   Ghasempour, Yasaman; Yeh, Chia-Yi; Shrestha, Rabi; Mittleman, Daniel; Knightly, Edward (April 2020, Proceedings of the 26th Annual International Conference on Mobile Computing and Networking)
4. Single Shot Single Antenna Path Discovery in THz Networks

   https://doi.org/https://doi.org/10.1145/3372224.3380895  

   Ghasempour, Yasaman; Yeh, Chia-Yi; Shrestha, Rabi; Mittleman, Daniel M.; Knightly, Edward (January 2020, Proceedings of the 26th Annual International Conference on Mobile Computing and Networking (MobiCom))

   THz communication has the potential to realize an order of magnitude increase in data rates due to the availability of wide THz-scale spectral bands. Unfortunately, establishing and managing highly directional beams in THz networks is challenging as links lack the “pseudo-omni” reception capability of lower bands and the product of AP-client beam resolution is high due to narrow beams of only a few degrees. In this paper, we present One-shot Path discovEry with a THz RAinbow (OPERA), a novel system that identifies dominant paths between the AP and all clients in order to efficiently steer directional beams. The key idea is to embed path direction into the inherent characteristics of signals traveling along each path. To do so, we exploit a single leaky wave antenna and create a THz Rainbow. A THz Rainbow transmission consists of distinct signals with unique spectral characteristics across the angular domain. Leveraging the spatial-spectral signatures in the THz Rainbow, all receivers can correlate the measured signal with the known transmission signatures to discover the sender’s path directions in one-shot. Our experiments demonstrate that OPERA achieves average direction estimates within 2◦ of ground truth for LOS and reflected paths. 

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5. A Single-Aperture, Single-Pixel Reader for Optical Frequency Identification

   https://doi.org/10.1109/ISCAS51556.2021.9401470  

   Fan, Xiaozhe; Hidalgo, James; Leon-Salas, Walter D. (May 2021, 2021 IEEE International Symposium on Circuits and Systems (ISCAS))

   null (Ed.)

   This paper presents a single-aperture, single-pixel reader for communication with Optical Frequency Identification (OFID) tags. OFID tags use solar cells to transmit and receive information wirelessly as well as to harvest radiant energy. Due to its single-aperture architecture, the reader's optical system provides a shared optical path for reception and transmission. Also, physical alignment between the reader and an OFID tag is visually guided using the reader's emitted light, securing a robust data link as long as the OFID tag is illuminated. In this paper, a description of the reader's optical and electronic sub-systems are presented. The transmitter and receiver circuits are described in detail. The transmitter, built with a linear LED driver, achieves a power efficiency of nearly 87%. The receiver, featuring a third-order bandpass filter, reduces both low-frequency and high-frequency ambient noise. A prototype of the reader was fabricated and housed in a custom 3D-printed enclosure. Test results show that the reader is able to receive modulated luminescent signals from an OFID tag at a distance of 1 m and at a data rate of 3 kbps. 

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