CompAct Arm: a Compliant Manipulator with Intrinsic Variable Physical Damping

IN THE summary of the report of the Expert Committee on Prematurity of the World Health Organization, published in this column in February 1951, Dr. Ethel Dunham indicated the concern of the Expert Committee in regard to uniformity of information on the incidence and mortality of prematurity. The need for uniformity is particularly urgent in a field where there are so many intrinsic variable factors. It has been shown time and again that the ability of a premature infant to survive, under the best of care, is closely correlated with the birth weight, which in itself reflects the stage of maturity. In turn, the stage of maturity at a given weight is affected by sex, race, and whether the child is a single or one of a multiple birth. Uniformly, at a particular stage of maturity, male infants are larger than female, single births are larger than multiple births and, in the United States, white babies are larger than Negro babies. These considerations underline the danger of misinterpretation of so-called over-all rates for the incidence of prematurity and for the mortality of premature infants. For example, at any given weight, Negro premature infants are probably more mature and consequently have a better chance of surviving.

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Summary-Introduction: Velocity Fields and Associated Thermodynamic Variations in the External Layers of Intrinsic Variable Stars

Symposium - International Astronomical Union ◽

10.1017/s0074180900104437 ◽

1960 ◽

Vol 12 ◽

pp. 131-193 ◽

Cited By ~ 2

Author(s):

P. Ledoux ◽

C. A. Whitney

Keyword(s):

Radial Velocity ◽

Variable Stars ◽

Velocity Fields ◽

Light Spectrum ◽

Physical Modification ◽

Intrinsic Variable

By intrinsic variable stars, we mean those stars which present variations in light, spectrum and radial velocity which cannot be accounted for in terms of purely geometrical or orbital factors; so that we have to appeal to some kind of periodic physical modification of the star.

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Search for intrinsic variable stars in three open clusters: NGC 1664, NGC 6811 and NGC 7209

Communications in Asteroseismology ◽

10.1553/cia146s21 ◽

2007 ◽

Vol 146 ◽

pp. 21-32 ◽

Cited By ~ 5

Author(s):

P. Van Cauteren

Keyword(s):

Variable Stars ◽

Open Clusters ◽

Intrinsic Variable

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Intrinsic Variable Learning for Brain-Machine Interface Control by Human Anterior Intraparietal Cortex

Neuron ◽

10.1016/j.neuron.2019.02.012 ◽

2019 ◽

Vol 102 (3) ◽

pp. 694-705.e3 ◽

Cited By ~ 8

Author(s):

Sofia Sakellaridi ◽

Vassilios N. Christopoulos ◽

Tyson Aflalo ◽

Kelsie W. Pejsa ◽

Emily R. Rosario ◽

...

Keyword(s):

Brain Machine Interface ◽

Interface Control ◽

Machine Interface ◽

Intrinsic Variable

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Sparse Multicategory Generalized Distance Weighted Discrimination in Ultra-High Dimensions

Entropy ◽

10.3390/e22111257 ◽

2020 ◽

Vol 22 (11) ◽

pp. 1257

Author(s):

Tong Su ◽

Yafei Wang ◽

Yi Liu ◽

William G. Branton ◽

Eugene Asahchop ◽

...

Keyword(s):

Optimization Problem ◽

Finite Sample ◽

High Dimensions ◽

Lasso Penalty ◽

Distance Weighted ◽

Finite Sample Simulations ◽

Group Structures ◽

Consistency Properties ◽

Intrinsic Variable ◽

Variable Group

Distance weighted discrimination (DWD) is an appealing classification method that is capable of overcoming data piling problems in high-dimensional settings. Especially when various sparsity structures are assumed in these settings, variable selection in multicategory classification poses great challenges. In this paper, we propose a multicategory generalized DWD (MgDWD) method that maintains intrinsic variable group structures during selection using a sparse group lasso penalty. Theoretically, we derive minimizer uniqueness for the penalized MgDWD loss function and consistency properties for the proposed classifier. We further develop an efficient algorithm based on the proximal operator to solve the optimization problem. The performance of MgDWD is evaluated using finite sample simulations and miRNA data from an HIV study.

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Physical Variables in the Olfactory Stimulation Process

The Journal of General Physiology ◽

10.1085/jgp.46.3.453 ◽

1963 ◽

Vol 46 (3) ◽

pp. 453-489 ◽

Cited By ~ 94

Author(s):

Don Tucker

Keyword(s):

Flow Rate ◽

Volume Flow Rate ◽

Olfactory Receptors ◽

Aqueous Solubility ◽

Amyl Acetate ◽

Olfactory Responses ◽

Flow Dependence ◽

Receptor Sites ◽

Physical Variables ◽

Intrinsic Variable

Electrical recording from small twigs of nerve in a tortoise showed that olfactory, vomeronasal, and trigeminal receptors in the nose are responsive to various odorants. No one kind of receptor was most sensitive to all odorants. For controlled stimulation, odorant was caused to appear in a stream of gas already flowing through the nose. Of the parameters definable at the naris, temperature, relative humidity, and nature of inert gas had little effect on olfactory responses to amyl acetate, whereas odorant species, odorant concentration, and volume flow rate effectively determined the responses of all nasal chemoreceptors. An intrinsic variable of accessibility to the receptors, particularly olfactory, was demonstrated. Flow dependence of chemoreceptor responses is thought to reflect the necessity for delivery of odorant molecules to receptor sites. Since the olfactory receptors are relatively exposed, plateauing of the response with flow rate for slightly soluble odorants suggests an approach to concentration equilibrium in the overlying mucus with that in the air entering the naris. Accordingly, data for responses to amyl acetate were fitted with Beidler's (1954) taste equation for two kinds of sites being active. The requirement for finite aqueous solubility, if true, suggests substitution of aqueous solutions for gaseous solutions. A suitable medium was found and results conformed to expectations. Olfactory receptors were insensitive to variation of ionic strength, pH, and osmotic pressure.

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Constraints on stellar evolution from pulsations

Symposium - International Astronomical Union ◽

10.1017/s0074180900031259 ◽

1984 ◽

Vol 105 ◽

pp. 421-440

Author(s):

Arthur N. Cox

Keyword(s):

Stellar Evolution ◽

Variable Stars ◽

Mixing Processes ◽

Rr Lyrae ◽

Internal Mixing ◽

Classical Cepheids ◽

Basic Parameters ◽

Effective Temperatures ◽

The Many ◽

Intrinsic Variable

Consideration of the many types of intrinsic variable stars, that is, those that pulsate, reveals that perhaps a dozen classes can indicate some constraints that affect the results of stellar evolution calculations, or some interpretations of observations. Many of these constraints are not very strong or may not even be well defined yet. In this review we discuss only the case for six classes: classical Cepheids with their measured Wesselink radii, the observed surface effective temperatures of the known eleven double-mode Cepheids, the pulsation periods and measured surface effective temperatures of three R CrB variables, the δ Scuti variable VZ Cnc with a very large ratio of its two observed periods, the nonradial oscillations of our sun, and the period ratios of the newly discovered double-mode RR Lyrae variables. Unfortunately, the present state of knowledge about the exact compositions; mass loss and its dependence on the mass, radius, luminosity, and composition; and internal mixing processes, as well as sometimes the more basic parameters such as luminosities and surface effective temperatures prevent us from applying strong constraints for every case where currently the possibility exists.

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