Over the past three decades, Harvard Forest Summer Research Program in Ecology (HF-SRPE) has been at forefront of expanding ecological tent for minoritized or otherwise marginalized students. By broadening definition ecology to include fields such as data science, software engineering, and remote sensing, we attract a broader range students, including those who may not prioritize field experien...

The first measurements of O2 broadening of NO lines is reported. For the NO fundamental vibration-rotation band, polynomial representations for this broadening at 299 K are given for Omega = 32 and Omega = (1/2) e and f transitions, respectively: gamma3/2(|m|) = 0.06463 - 0.00262|m| + 0.000147|m|2 - 0.00000327|m|3, gammaf1/2 (|m|) = 0.06515 - 0.00381|m| + 0.000271|m|2 - 0.00000665|m|3, and gamm...

The influence of ambient pressure on the spectral emission features and expansion dynamics of a plasma plume generated on a metal target has been investigated. The plasma plumes were generated by irradiating Cu targets using 6 ns, 1064 nm pulses from a Q-switched Nd:YAG laser. The emission and expansion dynamics of the plasma plumes were studied by varying air ambient pressure levels ranging fr...

We study the effect on bubble motion of the sudden streamwise expansion of a liquid-filled tube of square cross-section, which is formed by a pair of backward-facing and forward-facing steps. When a bubble of finite volume traveling under constant volume flux reaches the backward-facing step that marks the start of the expansion, the extent to which it broadens to partially fill the expansion d...

We fabricated nanosized KMgF3 single crystals via a dry pulsed laser ablation process using femtosecond laser pulses. The sizes, shapes, and crystallographic properties of the crystals were evaluated by transmission electron microscopy (TEM). Almost all of the particles were spherical with diameters of less than 100 nm, and they were not highly agglomerated. Selected-area electron diffraction a...

The structure and defects of nanodiamonds influence the hydrogen sorption capacity. Positronium can be used as a sensor for detecting places with the most efficient capture of hydrogen atoms. Hydrogenation of carbon materials was performed from gas atmosphere. The concentration of hydrogen absorbed by the sample depends on the temperature and pressure. The concentration 1.2 wt % is achieved at ...

We discuss advantages of the “end” resonances for the miniaturized, chip-scale atomic clocks based on alkali-vapor cells filled with high-pressure buffer gases. Compared to the commonly used 0-0 resonance clock design, these advantages include a higher signal-to-noise ratio, a narrower linewidth at high vapor densities, and a significantly reduced sensitivity to the frequency stability of the p...

Identifying and characterizing small-molecule inhibitors of protein-protein interactions is of high interest for drug discovery and for chemical genetics studies of biological pathways. Very often, initial hits or first-generation compounds have low micromolar dissociation constants and cause line broadening in NMR spectra. It is very important for subsequent structure-based compound optimizati...

Experimental evidences are presented showing unusually large and highly anisotropic vibrations in the "simple cubic" (SC) unit cell adopted by calcium over a broad pressure ranging from 30-90 GPa and at temperature as low as 40 K. X-ray diffraction patterns show a preferential broadening of the (110) Bragg reflection indicating that the atomic displacements are not isotropic but restricted to t...