Saturday – Apr 18
Location:
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- Time:
- 3:05 pm – 3:35 pm
- Title:
- Nanotube Elements for Extending P-Surface Schwarzites
- Speaker:
- Charlie Illingworth (St. John Fisher University)
Abstract
The search for new carbon allotropes continues to inspire advances in materials chemistry, with particular interest in sp2-carbon structures. Among these, negatively curved hypothetical Schwarzites represent an exciting opportunity to prepare materials with controlled electronic, mechanical, and adsorption properties. A bottom-up synthetic approach has been suggested to connect heptagon trimmers via covalent linkages for a precise control over the geometry and topology of the resulting network essential for realizing their potential in catalysis, energy storage, and molecular separation. In this theoretical study, we explored the idea of adding one-dimensional synthetic nanotubes of a uniform size as connectors between openings of P-surface Schwarzite chambers using the Materials Studio software. By varying the nanotube length, we were able to significantly broaden the achievable range of porosity and material density. The design was focused on specific tiling by heptagons for previously reported Schwarzites. The small and large chambers for each P-surface example dictated different types of nanotubes, zigzag and armchair, depending on the recently introduced topological characteristic – the neck configuration. We introduce a systematic nomenclature for nanotube–Schwarzite hybrid materials that defines the nanotube lengths along each of the three Cartesian axes and specifies both the Schwarzite topology and the chamber size (small or large) to which the nanotubes are attached.
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- Time:
- 3:05 pm – 3:35 pm
- Title:
- Pattern Avoidance in Lattice and Yamanouchi Words
- Speaker:
- Alanna Pellicane (SUNY Brockport)
Abstract
This research focuses on pattern avoidance in binary lattice and Yamanouchi words. We determine the number of such words of size $n$ that avoid one pattern in several specific cases. We characterize the structure of these words of some of these pattern avoiding-words.
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- Time:
- 3:05 pm – 3:35 pm
- Title:
- Testing the Predictability of Daily Changes in the French 2-Year Government Bond Yield
- Speakers:
- Qudus Bawaallah (SUNY Brockport), Prashant Chhantyal, Mohamed Musa
Abstract
This paper examines whether daily changes in the French 2-year government bond yield exhibit economically meaningful short-horizon predictability. Motivated by the asset-pricing and term-structure literature, the analysis shifts focus from the standard U.S., monthly-frequency setting to daily data in a European sovereign context. The empirical framework incorporates euro-area and global conditioning variables, including French–German and French–U.S. 2-year yield spreads and the ECB deposit facility rate. Forecasting is conducted using a parsimonious linear model estimated under an expanding-window, walk-forward design with strict out-of-sample evaluation. Across 1,731 out-of-sample observations, the model produces a small but statistically significant correlation between predicted and realized next-day yield changes. However, it fails to outperform a zero-change benchmark in formal forecast-accuracy tests, and directional accuracy is indistinguishable from chance. A yield-based backtest further indicates negative risk-adjusted performance. The results display clear regime dependence: predictive performance deteriorates markedly during the 2022–2023 ECB tightening cycle relative to the preceding low-rate period. Consistent with insights from Cochrane (2005) and Duffee (2002), the findings suggest that any weak predictive signal in yields is dominated by time-varying risk premia and structural shifts. The paper contributes a disciplined, out-of-sample null result: while modest statistical predictability exists in daily French 2-year yield changes, it is not economically robust and does not survive changes in the monetary-policy regime.