Evaluation of laboratory test methods for assessing the alkali-reactivity potential of aggregates by field site tests

Field site tests were carried out to assess the reliability of the tests developed by RILEM and some regional tests to evaluate the alkali-reactivity potential of aggregates (eight tests were included). One hundred concrete cubes made with 13 different European aggregate combinations were stored on eight different European field sites to compare their expansions with the laboratory test results. All highly reactive aggregate combinations caused significant expansion of concrete cubes within the first six years on all field sites from Norway to Spain. These and the non-reactive aggregate combinations were correctly identified with all laboratory tests. Concrete cubes with moderately reactive aggregate combinations expanded very slowly and mainly in the outdoor exposure sites with warm climate conditions. The RILEM test method AAR-4.1 (60°C accelerated concrete prism test) and the Norwegian concrete prism test at 38°C seem to be best suited to identity the potential reactivity of moderately reactive aggregate combinations.publishedVersio

Magnetic Properties of Epitaxial and Polycrystalline Fe/Si Multilayers

Fe/Si multilayers with antiferromagnetic interlayer coupling have been grown via ion-beam sputtering on both glass and single-crystal substrates. High-angle x-ray diffraction measurements show that both sets of films have narrow Fe peaks, implying a large crystallite size and crystalline iron silicide spacer layers. Low-angle x-ray diffraction measurements show that films grown on glass have rougher interfaces than those grown on single-crystal substrates. The multilayers grown on glass have a larger remanent magnetization than the multilayers grown on single-crystal substrates. The observation of magnetocrystalline anisotropy in hysteresis loops and $(hkl)$ peaks in x-ray diffraction demonstrates that the films grown on MgO and Ge are epitaxial. The smaller remanent magnetization in Fe/Si multilayers with better layering suggests that the remanence is not an intrinsic property.Comment: 9 pages, RevTex, 4 figures available by fax. Send email to [email protected] for more info. Submitted to '95 MMM proceeding

Trypsin Inhibitor. VII. Comparative Nutritive Value of Raw and Heated Soybean Meal for Poults

I. The trypsin inhibitor contained in one-half of a lot of soybean meal was destroyed by autoclaving at 15 pounds for 20 minutes. 2. This portion of the meal when fed at a level of 24 per cent to newly hatched poults gave a significantly greater gain in five weeks than did an equal amount of meal in which the inhibitor had not been destroyed. 3. The difference in growth is attributed to the destruction of the trypsin inhibitor

The Reeh-Schlieder property for thermal field theories

We show that the Reeh-Schlieder property w.r.t. the KMS-vector is a direct consequence of locality, additivity and the relativistic KMS-condition. The latter characterises the thermal equilibrium states of a relativistic quantum field theory. The statement remains vaild even if the given equilibrium state breaks spatial translation invariance.Comment: plain tex, 10 page

Trace-contrast models for capture-recapture without capture histories

This work was funded by the Royal Society of New Zealand through Marsden Grant 14-UOA-155. Ben Stevenson was supported by EPSRC/NERC Grant EP/1000917/1.Capture-recapture studies increasingly rely upon natural tags that allow animals to be identified by features such as coat markings, DNA profiles, acoustic profiles, or spatial locations. These innovations greatly increase the number of capture samples achievable and enable capture-recapture estimation for many inaccessible and elusive species. However, natural features are invariably imperfect as indicators of identity. Drawing on the recently developed Palm likelihood approach to parameter estimation in clustered point processes, we propose a new estimation framework based on comparing pairs of detections, which we term the trace-contrast framework. Importantly, no reconstruction of capture histories is needed. We show that we can achieve accurate, precise, and computationally fast inference. We illustrate the methods with a camera-trap study of a partially marked population of ship rats (Rattus rattus) in New Zealand.Publisher PDFPeer reviewe

The Utilization of Food Elements by Growing Chicks. XIII. The Effect of Additions of Dehydrated Alfalfa Meal to High Corn Chick Rations

Feeding trials were conducted on three groups of chicks in eight lots receiving a growing mash containing dehydrated alfalfa meal at levels of 2, 3, 4, 5, 6, 9, 10, 12, and 15 per cent. Comparisons were not made simultaneously but no general trend toward growth depression was evident in comparable lots. In addition duplicate trials of four lots of newly hatched New Hampshire chicks were made on pelleted rations carrying 0, 2, 4, and 6 per cent of a good quality dehydrated alfalfa meal. The chicks were all fed accurately known amounts of the pelleted rations for six weeks. In each of the duplicate trials the lot fed 2 per cent alfalfa meal made slightly better gains than the other lots. The lots fed 4 and 6 per cent alfalfa made as good gains as the control lots fed no alfalfa. It is evident that with the sample of dehydrated alfalfa meal used in these experiments no adverse effect was produced by the alfalfa. Another trial of four lots was made on rations containing 0, 5, 10 and 15 per cent of alfalfa meal. In this case equal gains were made by each of the alfalfa-fed lots and all were better than the control without alfalfa. It is also seen that the efficiency of gain was higher in the alfalfa-fed lots than in the control. Perhaps most interesting of all is the difference in time required to finish equal amounts of feed. Here the advantage is definitely in favor of the alfalfa-fed lots

The Utilization of Food Elements by Growing Chicks. XIII. The Effect of Additions of Dehydrated Alfalfa Meal to High Corn Chick Rations

Feeding trials were conducted on three groups of chicks in eight lots receiving a growing mash containing dehydrated alfalfa meal at levels of 2, 3, 4, 5, 6, 9, 10, 12, and 15 per cent. Comparisons were not made simultaneously but no general trend toward growth depression was evident in comparable lots. In addition duplicate trials of four lots of newly hatched New Hampshire chicks were made on pelleted rations carrying 0, 2, 4, and 6 per cent of a good quality dehydrated alfalfa meal. The chicks were all fed accurately known amounts of the pelleted rations for six weeks. In each of the duplicate trials the lot fed 2 per cent alfalfa meal made slightly better gains than the other lots. The lots fed 4 and 6 per cent alfalfa made as good gains as the control lots fed no alfalfa. It is evident that with the sample of dehydrated alfalfa meal used in these experiments no adverse effect was produced by the alfalfa. Another trial of four lots was made on rations containing 0, 5, 10 and 15 per cent of alfalfa meal. In this case equal gains were made by each of the alfalfa-fed lots and all were better than the control without alfalfa. It is also seen that the efficiency of gain was higher in the alfalfa-fed lots than in the control. Perhaps most interesting of all is the difference in time required to finish equal amounts of feed. Here the advantage is definitely in favor of the alfalfa-fed lots