氢键分子系统的非线性激发和质子传递的理论

基于对氢键分子系统中质子激发和移动的特点的仔细分析，提出一个新的哈密顿函数和理论，用以研究由质子位移所导致的质子的局域性涨落和重离子子晶格的构象畸变而引起的质子的集体激发和质子传递的特性，给出了运动方程和相应的孤立子解，讨论了这些解的特征 关键词：     

FLUORESCENCE PROPERTIES OF ETHENOTHIAMINE*

Abstract— The absorption and fluorescence properties of ethenothiamine in neutral and acidic solution are reported, and some are found to be in contradiction to previous findings. The low fluorescence quantum yields of ethenothiamine make it a poor substitute for the vitamin in biological systems.     

Franck—Condon factors for polyatomic molecules

The method of Sharp and Rosenstock for the calculation of Franck—Condon factors (J. chem. Phys. 41, 3453 (1964)) is revised. A few errors in the original contribution and in several subsequent papers are corrected. Explicit formulae for 141 FC factors including overtones up to the 11th order and hot bands are derived with the aid of a computer algebra system (Mathematica). As an example for an application of the newly derived FC factors, the fluorescence spectrum of acetylene is calculated within the Herzberg—Teller formalism.     

EMPIRICAL ANALYSIS OF CLIMATE CHANGE IMPACT ON LOBLOLLY PINE PLANTATIONS IN THE SOUTHERN UNITED STATES

Abstract Few studies have empirically examined climate change impacts on managed forests in the southern United States. In this paper, we use the U.S. Forest Service's Forest Inventory and Analysis Database to fit two growth models across the South and apply the four Hadley III climate scenarios developed for the Intergovernmental Panel on Climate Change Fourth Assessment Report to project future growth and site productivity on loblolly pine plantations. The static growth model provides a direct test of whether a significant climate influence on forest growth can be statistically derived, while the dynamic growth model estimates climate effects through site productivity. Results indicate considerable spatial variation in potential future growth and productivity change on loblolly pine plantations due to climate change in the southern United States, while overall regional effects are projected to be marginal. The pattern of climate change impacts is consistent across the growth models and climate scenarios. These findings have several implications for climate change adaptation policies.     

Line bundles and flat connections

We prove that there are cocompact lattices Γ in \(\text {SL}(2,\mathbb {C})\) with the property that there are holomorphic line bundles L on \(\text {SL}(2,\mathbb {C})/{\Gamma }\) with c ₁(L) = 0 such that L does not admit any unitary flat connection.