scholarly journals Early Discoverers XXXII: P. A. Tutkovskiy and the Glacial Theory of Loess Formation

1978 ◽  
Vol 20 (83) ◽  
pp. 405-408 ◽  
Author(s):  
I. J. Smalley

Abstract In 1899 P. A. Tutkovskiy published a theory of loess formation which depended on the presence of large continental glaciers. Unfortunately there was no glacial requirement in the theories of Berg and Richthofen and these have survived better than that of Tutkovskiy with the result that the close relationship between glacial action and loess formation is sometimes overlooked.

Author(s):  
Peter Baldwin

Americans Are Patriotic And Nationalist, but not more than some Europeans (figure 173). Unsurprisingly, Germans are least proud of their nation, and rather unexpectedly and cheerily, the Portuguese—not the Americans—are most proud, with the Irish tied for second place. A 2007 survey reveals that a larger proportion of Italians consider their culture superior than any other nationalities surveyed, including the Americans. Another survey finds that only the Irish feel more uniformly proud to be of their nation. Proportionately more Austrians, Irish, French, and Danes claim they feel very close to their nation than do Americans. Americans are more likely than any Europeans to think that their country is better than most others. But proportionately more Portuguese, Danes, and Spaniards feel that the world would be improved if other people were like them. And any U.S. tendency to boosterism is tempered by the finding that a larger fraction of Americans admits that certain aspects of their country shame them than do the Germans, Austrians, Spanish, French, Danes, or Finns. No country more robustly projects its own nationalist aspirations in the products it sells abroad than the supposedly postnational Swedes. Swedish manufacturers, or at least their advertising agencies, seem convinced that the sheer fact of being Swedish is a selling point. Ikea’s walls are adorned with musings on the preternaturally close relationship between Swedes and nature that allegedly sets them apart from the rest of humanity, as are packets of Wasa crispbread. Asko’s slogan, “Made In Sweden,” is festooned prominently on its products. Though it does not necessarily inspire confidence that the company’s dishwashers are better than the competition, it certainly makes clear Asko’s national origins. Absolut Vodka’s tag—in uncharacteristically unidiomatic English—“Country of Sweden,” does much the same. Saab hawks its cars as “Born from Jets,” an unsubtle allusion to the company’s standing as a pillar of the Swedish military-industrial complex.


1978 ◽  
Vol 20 (83) ◽  
pp. 405-408
Author(s):  
I. J. Smalley

AbstractIn 1899 P. A. Tutkovskiy published a theory of loess formation which depended on the presence of large continental glaciers. Unfortunately there was no glacial requirement in the theories of Berg and Richthofen and these have survived better than that of Tutkovskiy with the result that the close relationship between glacial action and loess formation is sometimes overlooked.


2013 ◽  
Vol 368-370 ◽  
pp. 939-944
Author(s):  
Xia Chen ◽  
Yan Shi ◽  
Yu Qiang Lin ◽  
Xiang Li ◽  
Shi Hua Zhou ◽  
...  

Upon large demands from southwest of China where a large number of hydropower stations are schemed or under construction with presence of a variety of aggregates, it is of necessity to launch a comprehensive investigation on influence of aggregates on properties of concrete which was rarely reported before. Four types of aggregates selected from different construction sites were used to conduct tests, and results indicated that water absorption of aggregates exhibited a consistent rising tendency over 180 days and it had close relationship with autogenously shrinkage of concrete which varied in the manner that high water absorption of aggregates produced more obvious shrinkage. With employment of advanced temperature and stress machine, concrete made with diorite and basalt was rated better than limestone and natural granite concrete in crack resistance based on comparison of cracking temperature and thermal impact according to RILEM TC119.


1978 ◽  
Author(s):  
D. H. Lister ◽  
M. I. Wedlock

Emmission measurements of carbon monoxide (CO), hydrocarbons (HC), and oxides of nitrogen (NOx) have been carried out on 12 Pratt and Whitney JT9D-7 turbofan engines after overhaul, and the effect of ambient conditions and engine to engine variation has been examined. Semi-theoretical correction factors, based on combustor inlet conditions, have also been applied to the data and a reduction in data scatter of better than 50 percent has been demonstrated. Average EPAPs for CO, HC, and NOx, have been determined: these are 13.9, 5.9, and 5.3 and bear a close relationship to other published data. Tests using both a fully thermostatted (423 K) or an uncooled probe have shown no observable differences in the measured emission levels.


2021 ◽  
Author(s):  
Michael Brusco ◽  
Douglas Steinley ◽  
Ashley L. Watts

Spectral clustering is a well-known method for clustering the vertices of an undirected network. Although its use in network psychometrics has been limited, spectral clustering has a close relationship to the commonly-used walktrap algorithm. In this paper, we report results from four simulation experiments designed to evaluate the ability of spectral clustering and the walktrap algorithm to recover underlying cluster structure in networks. The salient findings include: (1) the cluster recovery performance of the walktrap algorithm can be improved slightly by using exact K-means clustering instead of hierarchical clustering; (2) K-means and K-median clustering led to comparable recovery performance when used to cluster vertices based on the eigenvectors of Laplacian matrices in spectral clustering; (3) spectral clustering using the unnormalized Laplacian matrix generally yielded inferior cluster recovery in comparison to the other methods; (4) when the correct number of clusters was provided for the methods, spectral clustering using the normalized Laplacian matrix led to better recovery than the walktrap algorithm; (5) when the number of clusters was unknown, spectral clustering using the normalized Laplacian matrix was appreciably better than the walktrap algorithm when the clusters were equally-sized, but the two methods were competitive when the clusters were not equally-sized. Overall, both the walktrap algorithm and spectral clustering of the normalized Laplacian matrix are effective for partitioning the vertices of undirected networks, with the latter performing better in most instances.


2019 ◽  
Vol 28 (3) ◽  
pp. 254-259 ◽  
Author(s):  
Lindsey L. Hicks ◽  
James K. McNulty

A recent surge in research on automatic processes in close relationships has revealed new insights into how people form and update relationship evaluations as well as the implications of these evaluations for their relationship outcomes. We begin by summarizing this research within the framework of interdependence theory—the predominant theory of how people evaluate and make decisions about their close relationships. In doing so, we review evidence that implicitly assessed automatic partner attitudes reflect pleasant and unpleasant experiences involving the partner and predict subsequent relationship outcomes, sometimes better than more deliberative judgments. Next, we describe several dual-process perspectives that suggest how and when these attitudes shape such outcomes, and we conclude by highlighting the potential benefits of examining automatic partner attitudes for theories of relationship science and beyond.


2021 ◽  
Vol 13 (16) ◽  
pp. 9174
Author(s):  
Fanhua Yu ◽  
Huibowen Hao ◽  
Qingliang Li

Soil temperature (ST) plays an important role in agriculture and other fields, and has a close relationship with plant growth and development. Therefore, accurate ST prediction methods are widely needed. Deep learning (DL) models have been widely applied for ST prediction. However, the traditional DL models may fail to capture the spatiotemporal relationship due to its complex dependency under different related hydrologic variables. Hence, the DL models with Ensemble Empirical Mode Decomposition (EEMD) are proposed in this study. The proposed models can capture more complex spatiotemporal relationship after decomposing the ST into different intrinsic mode functions. Therefore, the performance of models is further improved. The results show that the performance of DL models with EEMD are better than that of corresponding DL models without EEMD. Moreover, EEMD-Conv3d has the best performance among all the experimental models. It has the highest R2 ranging from 0.9826 to 0.9893, the lowest RMSE ranging from 1.3096 to 1.6497 and the lowest MAE ranging from 0.9656 to 1.2056 in predicting ST at the lead time from one to five days. In addition, the lines between predicted ST and observed ST are closer to the ideal line (y = x) than other DL models. The results show that our EEMD-Conv3D can better capture spatiotemporal correlation and is an applicable method for predicting spatiotemporal ST.


2012 ◽  
Vol 1 (1) ◽  
pp. 33-53 ◽  
Author(s):  
Bei Yang,

AbstractLinguists have predominantly maintained that perception precedes production (Dinnsen 1983), an assertion also accepted by those studying second language acquisition (Flege 1995). However, an observation of acquisition of tones in Chinese as a second language suggests that American learners make different tonal mistakes in perception and production. This study explores tonal perception and production referring to the sound system of Mandarin, since a tone has a close relationship with an initial that is an onset and a final that is a rhyme within a syllable in Mandarin. The research instrument has 84 monosyllables that are representative according to the relationship among initials, finals and tones. Twenty-five American learners of Chinese in second-semester Chinese class and 11 learners of Chinese in fourth-semester Chinese class participated in this study. A two-way mixed ANOVA is the main statistical method used to analyze the acquisition data. The results reveal that tonal production is better than tonal perception. The error distribution of perception is influenced not only by tonal features, but also by initial features and final structures. For production, however, initial and final features do not influence tones. Therefore, the paper argues that tones are perceived at the phonological level and produced at the phonetic level and it takes L2 learners longer time to acquire phonological features of tones.


1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.


Author(s):  
J. Frank ◽  
P.-Y. Sizaret ◽  
A. Verschoor ◽  
J. Lamy

The accuracy with which the attachment site of immunolabels bound to macromolecules may be localized in electron microscopic images can be considerably improved by using single particle averaging. The example studied in this work showed that the accuracy may be better than the resolution limit imposed by negative staining (∽2nm).The structure used for this demonstration was a halfmolecule of Limulus polyphemus (LP) hemocyanin, consisting of 24 subunits grouped into four hexamers. The top view of this structure was previously studied by image averaging and correspondence analysis. It was found to vary according to the flip or flop position of the molecule, and to the stain imbalance between diagonally opposed hexamers (“rocking effect”). These findings have recently been incorporated into a model of the full 8 × 6 molecule.LP hemocyanin contains eight different polypeptides, and antibodies specific for one, LP II, were used. Uranyl acetate was used as stain. A total of 58 molecule images (29 unlabelled, 29 labelled with antl-LPII Fab) showing the top view were digitized in the microdensitometer with a sampling distance of 50μ corresponding to 6.25nm.


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