Point processes in general position

The aim of this note is to introduce for point processes in ? ^d the notions general position and reinforced general position, and to characterize these processes. As a consequence we show that Poisson processes P _ρ with an infinite intensity measures ρ are in general position iff ρ is diffuse in the sense that any affine subspace of dimension d ? 1 is a ρ-nullset. Moreover, P _ρ is in reinforced general position iff in addition any (d ? 1)-sphere is a ρ-nullset.     

Fourier-transform spectroscopy of NNO in the 3500-9000 cm region

The Fourier-transform absorption spectrum of ¹⁵N¹⁴N¹⁶O-enriched nitrous oxide has been recorded at the Doppler limited resolution in the spectral range 3500-9000 cm⁻¹. More than 15 000 transitions of ¹⁵N¹⁴N¹⁶O were observed and assigned based on the global effective Hamiltonian model. The band-by-band analysis led to the determination of the ro-vibrational parameters of a total of 133 bands. Among these bands, 103 were newly observed, and the rotational analysis of 30 others were significantly extended and improved.     

Determination of hydrogen atom positions in basic lead carbonate hydrocerussite by quantum chemical methods and simulation of the vibrational spectra

Positions of hydrogen atoms in the crystal structure of basic lead carbonate hydrocerussite are determined by the PM5 quantum chemical method. Raman and infrared spectra as well as thermodynamic functions are calculated for this compound by the theory of crystal lattice dynamics.     

光纤表面等离子体波传感器中膜厚与共振波长关系的实验研究

利用表面等离子体共振效应，研究了金属镀层厚度对光纤表面等离子体波传感器的影响。在其它参量一定的情况下，不同金属膜层厚度的传感器对应着不同的共振波长，根据这一特性设计了分布式光纤表达等离子体波传感器。突出优点是能进行多点测量。     

Numerical investigation of airflow inside a 1-in hard disk drive

The increasing application of the hard disk drive in consumer electronic devices has pushed the usage of the small form factor hard drives. At the same time, the data storage industry continues to enhance the capacity and performance of computer hard disk drive. The concerns of track mis-registration caused by various runout still remain with the form factor change. The objective of the current study is to numerically investigate the airflow characteristic inside a 1 in hard disk drive.     

Inequivalence of substitution pairs in hydroxynaphthaldehyde: A theoretical measurement by intramolecular hydrogen bond strength,aromaticity, and excited‐state intramolecular proton transfer reaction

The inequivalence of substitution pair positions of naphthalene ring has been investigated by a theoretical measurement of hydrogen bond strength, aromaticity, and excited state intramolecular proton transfer (ESIPT) reaction as the tools in three substituted naphthalene compounds viz 1‐hydroxy‐2‐naphthaldehyde (HN12), 2‐hydroxy‐1‐naphthaldehyde (HN21), and 2‐hydroxy‐3‐naphthaldehyde (HN23). The difference in intramolecular hydrogen bond (IMHB) strength clearly reflects the inequivalence of substitution pairs where the calculated IMHB strength is found to be greater for HN12 and HN21 than HN23. The H‐bonding interactions have been explored by calculation of electron density ρ(r) and Laplacian ?²ρ(r) at the bond critical point using atoms in molecule method and by calculation of interaction between σ* of OH with lone pair of carbonyl oxygen atom using NBO analysis. The ground and excited state potential energy surfaces (PESs) for the proton transfer reaction at HF (6‐31G**) and DFT (B3LYP/6‐31G**) levels are similar for HN12, HN21 and different for HN23. The computed aromaticity of the two rings of naphthalene moiety at B3LYP/6‐31G** method also predicts similarity between HN12 and HN21, but different for HN23. © 2010 Wiley Periodicals, Inc. J Comput Chem, 2010