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1. Multisections with divides and Weinstein 4-manifolds

   https://doi.org/10.4310/jsg.240921005038  

   Islambouli, Gabriel; Starkston, Laura (January 2024, Journal of Symplectic Geometry)

   We introduce a new decomposition of Weinstein 4-manifolds called multisections with divides and show these can be encoded diagrammatically by a sequence of cut systems on a surface, together with a separating collection of curves. We give two algorithms to construct a multisection with divides for a Weinstein 4-manifold, one starting with a Kirby-Weinstein handle decomposition and the other starting with a positive, allowable Lefschetz fibration (PALF). Through the connections with PALFs, we define a monodromy of a multisection and show how to symplectically carry out monodromy substitution on multisections with divides. 

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2. Trends in the Airglow Temperatures in the MLT Region—Part 2: SABER Observations and Comparisons to Model Simulations

   https://doi.org/10.3390/atmos12020167  

   Huang, Tai-Yin; Vanyo, Michael (February 2021, Atmosphere)

   null (Ed.)

   The Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) temperature measurements at low latitudes from 89 km to 97 km were used to derive the F10.7 and Ap index trends, and the trends were compared to model simulations. The annual mean nonzonal (e.g., at the model simulation location at 18° N, 290° E) SABER temperature showed a good-to-moderate correlation with F10.7, with a trend of 4.5–5.3 K/100 SFU, and a moderate-to-weak correlation with the Ap index, with a trend of 0.1–0.3 K/nT. The annual mean zonal mean SABER temperature was found to be highly correlated with the F10.7, with a similar trend, and moderately correlated with the Ap index, with a trend in a similar range. The correlation with the Ap index was significantly improved with a slightly larger trend when the zonal mean temperature was fitted with a 1-year backward shift in the Ap index. The F10.7 (Ap index) trends in the simulated O2 and the O(1S) temperature were smaller (larger) than those in the annual mean nonzonal mean SABER temperature. The trends from the simulations were better compared to those in the annual mean zonal mean temperature. The comparisons were even better when compared to the trend results obtained from fitting with a backward shift in the Ap index. 

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3. Queue-Sharing Multiple Access

   https://doi.org/10.1145/3416010.3423230  

   Garcia-Luna-Aceves, J.J.; Cirimelli-Low, Dylan (November 2020, MSWiM '20)

   Queue-Sharing Multiple Access (QSMA) is introduced and analyzed. The new channel-access method consists of establishing and maintaining a distributed transmission queue among nodes sharing a common channel and results in a sequence of queue cycles, with each cycle having one or multiple queue turns with collision-free transmissions from nodes that have joined the transmission queue, followed by a joining period for the current cycle. Nodes can take advantage of carrier sensing to improve the efficiency with which nodes join and use the shared transmission queue. The through- put of ALOHA with priority ACK’s, CSMA with priority ACK’s, CSMA/CD with priority ACK’s, TDMA with a fixed schedule, and QSMA with and without carrier sensing is compared analytically and by simulation in ns-3. The results show that QSMA is more efficient than TDMA with the simplicity of CSMA or ALOHA. 

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4. Selectivity between an Alder–ene reaction and a [2 + 2] cycloaddition in the intramolecular reactions of allene-tethered arynes

   https://doi.org/10.1039/d1qo00459j  

   Le, Anh; Lee, Daesung (June 2021, Organic Chemistry Frontiers)

   Substituent-dependent reactivity and selectivity in the intramolecular reactions of arynes tethered with an allene are described. With a 1,3-disubstituted allene moiety, an Alder–ene reaction of an allenic C–H bond is preferred over a [2 + 2] cycloaddition, whereas a [2 + 2] cycloaddition of the terminal π-bond of the allene is preferred with a 1,1-disubstituted allene. With a 1,1,3-trisubstituted allene-tethered aryne, an Alder–ene reaction with an allylic C–H bond is preferred over a [2 + 2] cycloaddition. 

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5. Tactile Emotions: Multimodal Affective Captioning with Haptics Improves Narrative Engagement for d/Deaf and Hard-of-Hearing Viewers

   https://doi.org/10.1145/3706598.3713304  

   de_Lacerda_Pataca, Caluã; Hassan, Saad; May, Lloyd; Olson, Michelle M; D'aurio, Toni; Peiris, Roshan L; Huenerfauth, Matt (April 2025, ACM)

   This paper explores a multimodal approach for translating emotional cues present in speech, designed with Deaf and Hard-of-Hearing (dhh) individuals in mind. Prior work has focused on visual cues applied to captions, successfully conveying whether a speaker’s words have a negative or positive tone (valence), but with mixed results regarding the intensity (arousal) of these emotions. We propose a novel method using haptic feedback to communicate a speaker’s arousal levels through vibrations on a wrist-worn device. In a formative study with 16 dhh participants, we tested six haptic patterns and found that participants preferred single per-word vibrations at 75 Hz to encode arousal. In a follow-up study with 27 dhh participants, this pattern was paired with visual cues, and narrative engagement with audio-visual content was measured. Results indicate that combining haptics with visuals significantly increased engagement compared to a conventional captioning baseline and a visuals-only affective captioning style. 

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