ExoMol line lists XXVIII: The rovibronic spectrum of AlH

A new line list for AlH is produced. The WYLLoT line list spans two electronic states $X\,{}^1\Sigma^+$ and $A\,{}^1\Pi$. A diabatic model is used to model the shallow potential energy curve of the $A\,{}^1\Pi$ state, which has a strong pre-dissociative character with only two bound vibrational states. Both potential energy curves are empirical and were obtained by fitting to experimentally derived energies of the $X\,{}^1\Sigma^+$ and $A\,{}^1\Pi$ electronic states using the diatomic nuclear motion codes Level and Duo. High temperature line lists plus partition functions and lifetimes for three isotopologues $^{27}$AlH, $^{27}$AlD and $^{26}$AlH were generated using ab initio dipole moments. The line lists cover both the $X$--$X$ and $A$--$X$ systems and are made available in electronic form at the CDS and ExoMol databases

Millimeter Wave Substrate Integrated Waveguide Antennas: Design and Fabrication Analysis

The paper presents a new concept in antenna design, whereby a photo-imageable thick-film process is used to integrate a waveguide antenna within a multilayer structure. This has yielded a very compact, high performance antenna working at high millimeter-wave (mm-wave) frequencies, with a high degree of repeatability and reliability in antenna construction. Theoretical and experimental results for 70 GHz mm-wave integrated antennas, fabricated using the new technique are presented. The antennas were formed from miniature slotted waveguide arrays using up to 18 layers of photo-imageable material. To enhance the electrical performance a novel folded waveguide array was also investigated. The fabrication process is analysed in detail and the critical issues involved in the fabrication cycle are discussed. The losses in the substrate integrated waveguide have been calculated. The performance of the new integrated antenna is compared to conventional metallic, air-filled waveguide antennas, and also to conventional microstrip antenna arrays operating at the same frequencies

Naval Force Planning Cases: Organizing Our Thoughts and Weighing Alternatives

At the highest level, a nation\u27s grand strategy influences its choice of naval forces. So, in turn, do military and maritime strategies. Each supports the higher order strategy while providing further insight into specific forces required

Strategy as a Guide to Force Planning

Is there a method to Pentagon madness? That is the question so often asked about defense planning by Congressional and journalistic critics. Between the extremes of throwing money at the problem and indiscriminate cuts, is there a better approach to force planning

The Art of Strategy and Force Planning

An ancient cliché holds that strategy is an art, not a science

Clear Strategies for a Murky World: Constructive Involvement and Selective Response

President Clinton has declared strong and simple strategic objectives: America must continue to lead the world we did so much to make.... Together with our friends and allies we will work to shape change lest it engulf us. When our vital interests or the will and the conscience of the international community is defied, we will act, with peaceful diplomacy when­ ever possible, with force when necessary. 1 But what are the implications of these goals? What kind of change do we seek and why? What are the strategies that will guide policy makers and force planners in this turbulent era