Boone County, Township 84 North Range 28 West

Des Moines River Plat Maps.

Sieve Analysis of Combined Aggregate Samples by Different Test Methods, MLR-84-05, 1982

This past winter the sieve analysis of combined aggregate was investigated. This study was given No. 26 by the Central Laboratory. The purpose of this work was to try and develop a sieve analysis procedure for combined aggregate which is less time consuming and has the same accuracy as the method described in I.M. 304. In an attempt to use a variety of aggregates for this investigation, a request was made to each District Materials Office to obtain at least 3 different combined aggregate samples in their respective districts. At the same time it was also requested that the field technician test these samples, prior to submitting them to the Central Laboratory. The field technician was instructed to test each sample as described in method I.M. 304 and also by a modified AASHTO T27 method which will be identified in the report as Method A. The modified AASHTO Method A was identical to T27 with the exception that a smaller sample is used for testing. The field technicians submitted the samples, test results and also comments regarding the modified AASHTO procedure. The general comments of the modified AASHTO procedure were: The method was much simpler to follow; however, it took about the same amount of time so there was no real advantage. After reviewing AASHTO T27, T164, I.M. 304 and Report No. FHWA-RD-77-53 another test method was purposed. Report No. FHWA-RD-77-53 is a report prepared by FHWA from data they gathered concerning control practices and shortcut or alternative test methods for aggregate gradation. A second test method was developed which also was very similar to AASHTO T27, The test procedure for this method is attached and is identified as Method B. The following is a summary of test results submitted by the Field Technicians and obtained by the aggregate section of the Central Laboratory.

Investigation of the Effect of Reheating Asphalts on the Test Results, MLR-84-09, 1984

All noncomplying penetration and absolute viscosity results must be verified before being reported. This verification of test results is done by reheating and retesting the identical sample that is suspect. The District Laboratories are required to submit penetration and absolute viscosity correlation samples to the Central Laboratory. These samples are the identical ones tested by the District Laboratories. When the Central laboratory tests these correlation samples they are also considered to be reheated and retested. Reheating a sample will harden the asphalt to some degree and possibly cause a change in the test results. This investigation was conducted to determine how much change in penetration and absolute viscosity could be expected by reheating and retesting asphalt samples.

Timber Abutment Piling and Back Wall Rehabilitation and Repair, TR-616, 2012

Based on previous National Bridge Inventory data, the state of Iowa has nearly 20,000 bridges on low-volume roads (LVRs). Thus, these bridges are the responsibility of the county engineers. Of the bridges on the county roads, 24 percent are structurally deficient and 5 percent are functionally obsolete. A large number of the older bridges on the LVRs are built on timber piling with timber back walls. In many cases, as timber abutments and piers age, the piling and back wall planks deteriorate at a rate faster than the bridge superstructure. As a result, a large percentage of the structurally deficient bridges on LVRs are classified as such because of the condition of the timber substructure elements. As funds for replacing bridges decline and construction costs increase, effective rehabilitation and strengthening techniques for extending the life of the timber substructures in bridges with structurally sound superstructures has become even more important. Several counties have implemented various techniques to strengthen/repair damaged piling, however, there is minimal data documenting the effectiveness of these techniques. There are numerous instances where cracked and failed pilings have been repaired. However, there are no experimental data on the effectiveness of the repairs or on the percentage of load transferred from the superstructure to the sound pile below. To address the research needs, a review and evaluation of current maintenance and rehabilitation methods was completed. Additionally, a nationwide survey was conducted to learn the methods used beyond Iowa. Field investigation and live-load testing of bridges with certain Iowa methods was completed. Lastly, laboratory testing of new strengthening and rehabilitation methods was performed.

Suomalaisesta tutkimusretkestä Sodankylään ja Kultalaan vuosina 1882-83 ja 1883-84, ynnä kuvaelmia Lapista - [Kansi]

Helsinki : G.W. Edlund 1885, J.C. Frenckell ja Poika

1.48 and 1.84 µm thulium emissions in monoclinic KGd(WO4)2 single crystals

By exciting at 788 nm, we have characterized the near infrared emissions of trivalent thulium ions in monoclinic KGd(WO4)2 single crystals at 1.48 and 1.84 mm as a function of dopant concentration from 0.1% to 10% and temperature from 10 K to room temperature. We used the reciprocity method to calculate the maximum emission cross-section of 3.0310220 cm2 at 1.838 mm for the polarization parallel to the Nm principal optical direction. These results agrees well with the experimental data. Experimental decay times of the 3H4!3F4 and 3F4!3H6 transitions have been measured as a function of thulium concentration.

Martínez Maza, Clelia, Hipatia. La estremecedora historia de la última gran filósofa de la Antigüedad y la fascinante ciudad de Alejandría, La Esfera de los Libros, Madrid, 2009, 378 páginas. ISBN: 978 84-9734-824-9

El estreno de la película Ágora de Alejandro Amenábar en octubre de 2009 puso nuevamente de moda la figura de la célebre filósofa y matemática Hipatia (a quien en rigor deberíamos llamar Hipacia) y generó la aparición de un gran número de monografías, novelas y artículos de todo tipo acerca de su figura. De entre toda esta producción destaca el libro de Clelia Martínez Maza, profesora titular de Historia Antigua de la Universidad de Málaga. Como pone de manifiesto su producción científica, la autora es una gran conocedora del fenómeno religioso y de los conflictos sociales vividos durante la Antigüedad tardía, algo que también puede observarse en la presente obra. Nos hallamos ante una monografía de divulgación culta, como manifiesta la abundante documentación que la autora maneja, aunque el libro carezca de notas tanto al final del volumen como a pie de página, algo normal en estos casos.

1.84 micron emission of Tm3+ sensitized by Yb3+ ions in monoclinic KGd(WO4)2 single crystals

By exciting at 940 nm, we have characterized the 1.84 m near infrared emission of trivalent thulium ions in Yb3+, Tm3+:KGd WO4 2 single crystals as a function of the dopant concentration and temperature, from 10 K to room temperature. An overall 3H6 Stark splitting of 470 cm−1 for the Tm3+ ions in the Yb3+, Tm3+:KGd WO4 2 was obtained. We also studied the blue emission at 476 nm Tm3+ and the near infrared emissions at 1.48 m Tm3+ and 1 m Yb3+ as a function of the dopant concentration. Experimental decay times of the 1G4, 3H4, and 3F4 Tm3+ and 2F5/2 Yb3+ excited states have been measured as a function of Yb3+ and Tm3+ ion concentrations. For the 3F4 →3H6 transition of Tm3+ ions, we used the reciprocity method to calculate the maximum emission cross section of 3.07 10−20 cm2 at 1.84 m for the polarization parallel to the Nm principal optical direction.

Motivacions i barreres en la població de Canovelles de 65 a 84 anys al Complex Esportiu Municipal Thalassa

El present estudi s’emmarca en una investigació centrada en les persones grans de 65 a 84 anys del municipi de Canovelles. L’objectiu d’aquesta recerca és conèixer les principals motivacions i barreres d’aquest col·lectiu a l’hora d’anar al Complex Esportiu Municipal – Thalassa. Lligat amb els objectius marcats, la finalitat és relacionar els resultats amb possibles propostes de millora, per tal de minimitzar les barreres i potenciar les motivacions. Per obtenir els resultats s’ha passat un qüestionari a 40 persones demanant les raons per les quals van o no al complex. Un cop analitzats podem extreure, a tall de conclusions, que la principal motivació va relacionada amb temes de salut i la principal barrera amb temes econòmic, el cost mensual de la instal·lació per un abonat.

[Sonatiini op. 84]

Digitoitu 20. 8. 2008.