42 research outputs found
Circular No. 30 - The Codling Moth (\u3ci\u3eCarpocapsa pomonella\u3c/i\u3e L.)
The Utah Experiment Station bulletins originally published, outlining satisfactory methods for reducing injury by the codling moth, are no longer available for distribution. This circular. contains in briefer form the essential information for controlling the pest
Magnetism, FeS colloids, and Origins of Life
A number of features of living systems: reversible interactions and weak
bonds underlying motor-dynamics; gel-sol transitions; cellular connected
fractal organization; asymmetry in interactions and organization; quantum
coherent phenomena; to name some, can have a natural accounting via
interactions, which we therefore seek to incorporate by expanding the horizons
of `chemistry-only' approaches to the origins of life. It is suggested that the
magnetic 'face' of the minerals from the inorganic world, recognized to have
played a pivotal role in initiating Life, may throw light on some of these
issues. A magnetic environment in the form of rocks in the Hadean Ocean could
have enabled the accretion and therefore an ordered confinement of
super-paramagnetic colloids within a structured phase. A moderate H-field can
help magnetic nano-particles to not only overcome thermal fluctuations but also
harness them. Such controlled dynamics brings in the possibility of accessing
quantum effects, which together with frustrations in magnetic ordering and
hysteresis (a natural mechanism for a primitive memory) could throw light on
the birth of biological information which, as Abel argues, requires a
combination of order and complexity. This scenario gains strength from
observations of scale-free framboidal forms of the greigite mineral, with a
magnetic basis of assembly. And greigite's metabolic potential plays a key role
in the mound scenario of Russell and coworkers-an expansion of which is
suggested for including magnetism.Comment: 42 pages, 5 figures, to be published in A.R. Memorial volume, Ed
Krishnaswami Alladi, Springer 201
Épisodes d’inactivité et revenus criminels dans une trajectoire de délinquance
L’instabilité de l’activité criminelle dans le temps est déjà bien documentée. On connaît toutefois
peu les circonstances qui expliquent ces variations à court terme. Une meilleure connaissance de
ces facteurs est souhaitable puisqu’il est possible que les transitions et les changements à court
terme précèdent les points tournants des carrières criminelles. Les conditions qui rendent compte
d’une interruption temporaire des activités peuvent, par exemple, contribuer à expliquer un
désistement définitif. L’étude se fonde sur les trajectoires de 172 délinquants impliqués dans des
crimes à but lucratif et analyse les variations mensuelles de leurs revenus criminels ainsi que les
épisodes d’inactivité criminelle à l’intérieur d’une période fenêtre de 36 mois. La méthode des
calendriers d’histoire de vie combinée aux modèles hiérarchiques permet d’examiner
conjointement le rôle de facteurs statiques (les caractéristiques individuelles des sujets) et
dynamiques (les circonstances de vie). Les résultats mettent en évidence l’importance des
événements qui marquent le style de vie des délinquants et des paramètres qui caractérisent
l’engagement criminel dans la compréhension des variations dans les trajectoires à l’étude. Ils
soulignent également l’importance de la finalité derrière les activités criminelles pour expliquer
la décision des délinquants de cesser temporaire leurs activités illicites
The James Webb Space Telescope Mission
Twenty-six years ago a small committee report, building on earlier studies,
expounded a compelling and poetic vision for the future of astronomy, calling
for an infrared-optimized space telescope with an aperture of at least .
With the support of their governments in the US, Europe, and Canada, 20,000
people realized that vision as the James Webb Space Telescope. A
generation of astronomers will celebrate their accomplishments for the life of
the mission, potentially as long as 20 years, and beyond. This report and the
scientific discoveries that follow are extended thank-you notes to the 20,000
team members. The telescope is working perfectly, with much better image
quality than expected. In this and accompanying papers, we give a brief
history, describe the observatory, outline its objectives and current observing
program, and discuss the inventions and people who made it possible. We cite
detailed reports on the design and the measured performance on orbit.Comment: Accepted by PASP for the special issue on The James Webb Space
Telescope Overview, 29 pages, 4 figure
Circular No. 31 - The Alfalfa Weevil (\u3ci\u3ePhytonomus posticus\u3c/i\u3e Fab.)
The alfalfa weevil is rapidly spreading over the entire alfalfa-growing areas of the western states. Its injury to the alfalfa crop still aggregates an enormous sum annually. This is due to the fact that each year it is extending its attack into new territory. Control measures adopted by the farmers are reducing its injury in the treated fields. Many farmers are now cutting more alfalfa in the weevil-infested districts than before the appearance of this pest because of adopting better cultural methods as outlined in Bulletin No. 110 and Circular 10 of this station. Both of these publications are now out of print
The General Morphology of the Female Reproductive System of a Viviparous Roach, Diploptera Dytiscoides (Serville)
Volume: 48Start Page: 1End Page:
A Brief Analysis of Viviparity in Insects
Volume: 56Start Page: 63End Page: 6