Near-infrared2Δ-2Π nitric oxide laser with predissociated lower state

The spectrum of the light emitted at 10 200 Å by an NO laser is photographed with high resolution. The rotational analysis fully confirms the assignment made earlier to the transitionF^{2}Delta-C^{2}Pi(1, 1) between two electronically excited levels of the NO molecule, both of which are configurationally mixed with valence levels.     

Color Phenomena Associated With Energy Transfer in Afterglows and Atomic Flames

Reactions involving reactive species produced in electric discharges are frequently characterized by the emission of visible light of many different colors. Some typical afterglows and atomic flames have been photographed, and the observed colors (or spectral distributions) are discussed with regard to the reactions from which they arise. Laboratory studies of this sort are helpful for the understanding of the energy transfer processes which occur in flames, in electrical discharges, and in the upper atmosphere.     

Mice: Progesterone and the regulation of strain differences in pregnancy-induced nest building.

Four experiments with 113 C57BL/6J and 80 DBA/2J female mice showed that pregnant DBA/2J Ss built significantly larger and more completely enclosed nests than did pregnant C57BL/6J Ss. This strain difference was restricted to the last half of gestation and was not observed during either the virgin state or lactation. Genotype-based differences in pregnancy-induced nest building were not related to circulating levels of progesterone (P), core temperature, or body weight. Exposure to supplemental P (100, 200, or 400 μg, sc) during pregnancy elevated nest building exhibited by pregnant C57BL Ss but did not induce DBA-like levels of the behavior. Also, virgin DBA Ss built larger nests in response to P than did C57BL Ss. Findings suggest that differences in the sensitivity of central neural tissue to steroid hormones may account for genotypically determined variation in patterns of pregnancy-induced nest building. (27 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Language therapy effects in long term aphasia

This report describes the results of language therapy initiated 1 to 6 years after the onset of aphasia in 14 patients. During the course of treatment, each of the 14 patients improved strongly in their communicative abilities (PICA), according to clinical observation and reports from family, hospital ward personnel, or both.     

Estimating the kinematics and structure of a rigid object from asequence of monocular images

The problem considered involves the use of a sequence of noisy monocular images of a three-dimensional moving object to estimate both its structure and kinematics. The object is assumed to be rigid, and its motion is assumed to be smooth. A set of object match points is assumed to be available, consisting of fixed features on the object, the image plane coordinates of which have been extracted from successive images in the sequence. Structure is defined as the 3-D positions of these object feature points, relative to each other. Rotational motion occurs about the origin of an object-centered coordinate system, while translational motion is that of the origin of this coordinate system. In this work, which is a continuation of the research done by the authors and reported previously (ibid., vol.PAMI-8, p.90-9, Jan. 1986), results of an experiment with real imagery are presented, involving estimation of 28 unknown translational, rotational, and structural parameters, based on 12 images with seven feature points     

The 0–2 Transition of CO in Condensed Oxygen,Nitrogen, and Argon

Infrared absorption spectra of CO in the region of the first overtone have been observed in dilute (approximately 1 to 10 parts in 1000) liquid solutions of oxygen, nitrogen, and argon, and clear crystalline nitrogen and argon matrices. The overtone band was found at 4249.0, 4252.4, and 4252.0 cm⁻¹ with half widths of 18.4, 17.8, and 13.7 cm⁻¹ in liquid oxygen, nitrogen, and argon solutions at 82, 78, and 82 °K, respectively. The half width in liquid oxygen varied from 18.4 to 10.0 cm⁻¹ in the temperature range 82 to 57 °K. The band position was the same but its width was smaller in the crystalline nitrogen matrix. Two bands were observed in the clear crystalline argon solid at 4245 and 4256 cm⁻¹. The solution results cannot be interpreted with the recent theory of Buckingham.Infrared absorption spectra of carbon monoxide in the region of the first overtone have been observed in the liquid solvents oxygen, nitrogen, and argon. In addition, the spectra have been obtained in clear crystalline solutions of argon and of nitrogen near the triple points of these solvents. The purpose of these experiments was to determine the influence of temperature, phase changes, and solvents on half width, position, and shape of the CO absorption band.A Perkin-Elmer model 99 monochromator with a 2000 lines/cm grating blazed at 10° (1.7μ in first order) was used in the first order with a spectral slit width of about 1 cm⁻¹. An antireflection coated germanium filter eliminated the higher orders from the 1000 w tungsten filament lamp used as the light source. The quartz absorption cell used, recently described by Bass and Broida [1], was modified slightly by recessing the windows further into the coolant tube. The resultant increased thermal contact between the refrigerant and the solution greatly simplified the growing of the clear crystalline matrices. The temperature of the refrigerant, liquid oxygen, was regulated by pumping on it with a small vacuum pump (capacity 14 liters/min). The vapor pressure of the liquid oxygen refrigerant, measured with an aneroid type gauge, provided an indication of the temperature. The direct measurement of the vapor pressure above the solution with a mercury manometer also provided an indication of the temperature. Solutions were prepared from the gases which had been mixed in the ratios of 1 to 10 parts carbon monoxide to 1000 parts of the various solvents. The position, the half width, and the shape of the spectral band did not depend on the concentration in this range. The clear solid solutions were grown slowly from the liquids at or near the triple points of the solvents.The measured frequencies and half widths of the 0–2 transition of CO in condensed oxygen, nitrogen, and argon are summarized in 2]). There were no changes in the position or the shape of the band in liquid oxygen at temperatures from 57 to 82 °K. However the half-band width varied from 10.0 to 18.4 cm⁻¹ in this temperature range. In liquid argon the band is slightly asymmetric with more absorption on the high-frequency side.

Table 1

The 0–2 transition of CO in condensed oxygen, nitrogen and argon

Estimation of object motion parameters from noisy images

An approach is presented for the estimation of object motion parameters based on a sequence of noisy images. The problem considered is that of a rigid body undergoing unknown rotational and translational motion. The measurement data consists of a sequence of noisy image coordinates of two or more object correspondence points. By modeling the object dynamics as a function of time, estimates of the model parameters (including motion parameters) can be extracted from the data using recursive and/or batch techniques. This permits a desired degree of smoothing to be achieved through the use of an arbitrarily large number of images. Some assumptions regarding object structure are presently made. Results are presented for a recursive estimation procedure: the case considered here is that of a sequence of one dimensional images of a two dimensional object. Thus, the object moves in one transverse dimension, and in depth, preserving the fundamental ambiguity of the central projection image model (loss of depth information). An iterated extended Kalman filter is used for the recursive solution. Noise levels of 5-10 percent of the object image size are used. Approximate Cramer-Rao lower bounds are derived for the model parameter estimates as a function of object trajectory and noise level. This approach may be of use in situations where it is difficult to resolve large numbers of object match points, but relatively long sequences of images (10 to 20 or more) are available.     

CH in the Solar Spectrum

CH lines in the solar spectrum have been identified by direct comparison of measured laboratory and solar wavelengths and intensities. The comparisons of individual rotational lines are included in a series of tables arranged according to electronic and vibrational transitions.A detailed investigation of the presence of CH lines in the solar spectrum has been carried out recently as part of the preparation of a current edition of solar spectrum data to replace the 1928 compendium [1].¹ Along with the study of atomic lines, a parallel survey of molecules in the sun is required for any complete revision of the “Solar Spectrum.” A preliminary résumé of the number of CH, OH, and CN lines in the solar spectrum was recently published [2].Many lines of CH are familiar features in the solar spectrum. In his original table, Rowland [3] attributed some of these lines to “C,” and numerous CH lines were included in the 1928 edition [1]. Several authors have carried the work further. For example, Hunaerts [4] and Richardson [5] have each published a list of solar lines which may be ascribed to CH.The present results are based on a study of the rotational structure of individual bands, together with relative laboratory intensities measured along the different branches. It reveals more CH lines in the sun than have been recognized heretofore. A summary of the counts is included in 2] they referred to solar lines. Consequently, if two CH lines contribute to one solar line, each CH line is counted here as a blend. Exception has been made in the case of