THE INVESTIGATION OF EARTH RESISTIVITIES IN THE VICINITY OF A DIAMOND DRILL HOLE

Geophysics ◽  
1951 ◽  
Vol 16 (4) ◽  
pp. 659-665 ◽  
Author(s):  
A. R. Clark ◽  
D. J. Salt
Keyword(s):  
Drill Hole ◽  
Conducting Medium ◽  
Electrical Measurements ◽  
Conducting Sphere ◽  
Diamond Drill ◽  
Sulphide Ore ◽  
Ore Body ◽  
The Difference ◽  
Commercial Size ◽  
Made In

The method of electrical images has been used to derive an expression for the difference in potential between two points close to a good conducting sphere in a poor conducting medium. The results indicate that the presence of a conducting ore body of commercial size near a drill hole can be detected by suitable electrical measurements made in the hole. The results of a test of the method in a drill hole near a small conducting sulphide ore body are given.

THE CYLINDRICAL ORE BODY IN THE PRESENCE OF A CABLE CARRYING AN OSCILLATING CURRENT

Geophysics ◽  
1952 ◽  
Vol 17 (2) ◽  
pp. 378-386 ◽  
Author(s):  
James R. Wait
Keyword(s):  
Electrical Properties ◽  
Massive Sulphide ◽  
Conducting Medium ◽  
Geophysical Prospecting ◽  
Conducting Cylinder ◽  
Sulphide Ore ◽  
Ore Body ◽  
The Media ◽  
Special Case ◽  
Ore Zones

The problem of an infinite cable carrying an oscillating current parallel to a conducting cylinder is solved. The homogeneous electrical properties of the media inside and outside the cylinder can be arbitrary. The special case is considered in detail where the exterior medium is a relatively poor conducting medium. The application to geophysical prospecting for massive sulphide ore zones is discussed.

scholarly journals XIX. On the difference of meridians of the Royal Observatories of Greenwich and Paris

1827 ◽  
Vol 117 ◽  
pp. 286-296 ◽  
Keyword(s):  
The Other ◽  
Detailed Account ◽  
Sidereal Time ◽  
Methods Of Calculation ◽  
Royal Observatory ◽  
The Difference ◽  
Made In

In the Philosophical Transactions for 1826, Part II. Mr. Herschel has given a detailed account of observations, which were made in the month of July, 1825, for the purpose of ascertaining the difference of the meridians of the Royal Observatories of Greenwich and Paris, with a computation of these observations, from which the most probable value of the difference of longitude appears to be 9 m 21 s. 6. But I have perceived that in the copy of the observations delivered to him from the Royal Observatory of Greenwich, an error of one second has been committed; as the true sidereal time of the observation made there on 21st July, ought to be 17 h 38 m 57·12 in place of 17 h 38 m 56 s. 10, set down in the Table p. 104, which he informs me was computed at the Observatory, and officially communicated to him from the Astronomer Royal. This error seems to have had its origin in the little Table at the bottom of page 103; for, on subtracting the error of the clock, 47 s. 37, from the time 18 h 8 m 30 s. 40, the true sidereal time is 18 h 7 m 43 s. 03, instead of 18 h 7 m 42 s. 03, there given. The error in the result of that day’s observations, arising from this cause, has been partly compensated by a mistake of three tenths of a second, which has occurred in calculating the combined observations of the same day, the gain of mean on sidereal time being stated to be — 4 s. 54 (pp. 120 and 122), in place of — 4 s. 24. On checking the other observations, a few trifling alterations appear to be necessary upon the Greenwich Table of sidereal time, from the data given along with it. These seem to be occasioned by different methods of calculation, and indeed are hardly worthy of notice. The French astronomers not having given the data on which the calculations of the sidereal times at Paris are founded, they are assumed to be correct.

Neural network processing of radar scanning data array

2021 ◽  
Author(s):  
V.E. Dmitriyev ◽  
D.V. Popov ◽  
V.A. Shakhnov
Keyword(s):  
Spatial Perception ◽  
Digital Processing ◽  
Radar Data ◽  
Information Value ◽  
Data Array ◽  
Additional Information ◽  
Distribution Of Values ◽  
The Difference ◽  
Radar Data Processing ◽  
Made In

This article deals with the digital processing of a matrix radar image. The information received from the radar scanner needs to be transformed to enable visual perception. The article describes the main methods of digital processing of matrix data, presents the images transformed by them. The aim of the article was the development of a radar data processing algorithm that identifies the contours and edges of examined objects. The authors propose an algorithm for isolating the geometric structure of the scanned area. The difference between the processing method and the known analogues is based on the nature of the change in the values of the array being processed and consists in the double operation of extracting the gradient of the distribution of values. The software implementation of the algorithm is made in C++ using methods from an open library of computer vision. The efficiency of the algorithm was estimated based on comparison with the algorithms for determining edges based on linear filtering and neural networks. The results of the work can be used to create software for mobile short-range radar devices. Imaging from object boundaries and their edges provides spatial perception of the image by the operator, and free areas are available for rendering additional information. This solution allows you to combine scanning devices and thereby increase the information value of the result.

Localizing cross-linguistic variation in Tense systems: On telicity and stativity in Swedish and English

2012 ◽  
Vol 35 (1) ◽  
pp. 27-70
Author(s):  
Björn Lundquist
Keyword(s):  
Romance Languages ◽  
Linguistic Variation ◽  
Verb Morphology ◽  
Reference Time ◽  
Lexical Aspect ◽  
Temporal Interpretation ◽  
Viewpoint Aspect ◽  
The Difference ◽  
Made In

It is well known that the aktionsart/lexical aspect of a predicate influences the temporal interpretation and the aspectual marking of a sentence, and also that languages differ with respect to which aktionsart properties feed into the tense-aspect system (see e.g. Bohnemeyer & Swift 2004). In this paper, I try to pin down the exact locus of variation between languages where the stative–dynamic distinction is mainly grammaticized (e.g. English, Saamáka) and languages where the telic–atelic distinction is mainly grammaticized (e.g. Swedish, Chinese and Russian). The focus will be on the differences between English and Swedish, and I will argue that these two languages crucially differ in the nature of Assertion Time (or Topic/Reference Time, Klein 1994, Demirdache & Uribe-Etxebarria 2000): whereas the assertion time in English is always punctual in imperfective contexts, assertion time in Swedish can extend to include minimal stages of events. The Assertion Time is introduced by a (viewpoint) aspect head that is present in both languages, but not phonologically realized. The difference can thus not be ascribed to the presence or absence of overt tense, aspect or verb morphology, or to a special tense value, as argued in one way or other by, for example, Giorgi & Pianesi (1997), Demirdache & Uribe-Etxebarria (2000) and Ramchand (2012). Once this factor (i.e. the nature of Assertion Time) has been isolated, it becomes evident that all verbs in English and Swedish, regardless of telicity or dynamicity, can be assigned either a perfective or an imperfective value. Moreover, I will argue that the English progressive–non-progressive (or ‘simple’) distinction is independent of viewpoint aspect (i.e. the perfective– imperfective distinction) made in, for example, the Romance languages.

scholarly journals XXXIV. Observations on the transit of Ve­nus, June the 6th, 1761, made in Spital-Square; the longitude of which is 4' 11" west of the Royal Observatory at Green­wich, and the latitude 51° 31' 15" north

1761 ◽  
Vol 52 ◽  
pp. 182-183
Keyword(s):  
The Sun ◽  
Royal Observatory ◽  
The Mean ◽  
The Difference ◽  
Made In

Having measured the diameter of Venus, on the sun, three times, with the object-glass micrometer, the mean was found to be 58 seconds; and but 6/10 of a second, the difference of the extremes.

Studies on the storage of potatoes II. The temperature conditions inside potato clamps

1950 ◽  
Vol 40 (3) ◽  
pp. 199-226 ◽  
Author(s):  
E. M. Crook ◽  
D. J. Watson
Keyword(s):  
Air Temperature ◽  
Heat Production ◽  
First Year ◽  
Temperature Conditions ◽  
Mean Temperature ◽  
The Difference ◽  
Made In

Continuous records of the temperature of potatoes stored in clamps were made in 1942–3 (one clamp) and in 1943–4 (three clamps). In the first year, the temperatures at various positions in the clamp coverings were also recorded.The temperature at the middle of the potato heap showed a drift with time similar to that of mean air temperature. Deviations of mean air temperature from smooth trend, lasting for about a week, had no effect on the temperature of the potatoes; longerperiod deviations were reflected in the temperature of the potatoes after a lag of about a week. The difference in weekly mean temperature between potatoes and external air averaged about 1–5° C. in 1943–4. In 1942–3 it was greater, increasing to over 20° C. in April, because bacterial rotting of the potatoes following blight infection increased the rate of heat production and caused the clamp to collapse at the end of April.

The prevalence of ethnocentric tendencies in Bangladesh

2015 ◽  
Vol 9 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Tamgid Ahmed Chowdhury
Keyword(s):  
Developed Countries ◽  
Consumer Products ◽  
Point Of View ◽  
Potential Threat ◽  
Content Type ◽  
Positive Attitudes ◽  
Rigorous Study ◽  
The Difference ◽  
The Developed Countries ◽  
Made In

Purpose – This paper aims to argue that the traditional belief that “consumer ethnocentrism is a phenomenon of the developed countries only” is no longer true. To establish this argument, our study assesses the applicability of the Consumer Ethnocentric Tendencies Scale (CETSCALE) in Bangladesh by judging the unidimensionality feature of the same. Design/methodology/approach – The methodology is based on sample of 788 respondents collected from 27 border and non-border districts of Bangladesh. Findings – Statistically significant results show that for the consumers of border and non-border districts, the original CETSCALE is, to a great extent, applicable as those groups have shown positive attitudes in retaining 12-14 items out of the 17 items of the original scale. However, the groups and the respondents as a whole did not agree with the unidimensionality feature of the CETSCALE. Practical implications – The results of the study show that Bangladeshi consumers prefer to see “Made in Bangladesh” tags when buying consumer products – a significant potential threat that the multinational companies need to address while planning to expand business in Bangladesh. Originality/value – This type of rigorous study on Bangladesh has never been done before. Moreover, the study identifies the difference in ethnocentric behavior of the consumers living in border and non-border areas – a study of ethnocentrism from a different point of view.

Bioenergetics of Na+ transport across frog skin: chemical and electrical measurements

1983 ◽  
Vol 245 (6) ◽  
pp. F691-F700 ◽  
Author(s):  
M. M. Civan ◽  
K. Peterson-Yantorno ◽  
D. R. DiBona ◽  
D. F. Wilson ◽  
M. Erecinska
Keyword(s):  
Free Energy ◽  
Frog Skin ◽  
Atp Hydrolysis ◽  
Transepithelial Transport ◽  
Base Line ◽  
Free Energies ◽  
Electrical Measurements ◽  
Far From Equilibrium ◽  
The Difference ◽  
Hydrolysis Of

Enzymatically prepared split frog skins consisted purely of epithelial cells. Electrical parameters and the cell contents of ATP, ADP, phosphocreatine (PCr), creatine, inorganic phosphate, protein, and water were measured in skins maintained at room temperature. Studies were conducted under base-line conditions, 15 and 60 min after adding vasopressin, and 30 min after adding amiloride. Intracellular ionic activities and concentrations were obtained from previous results. The data demonstrated that 1) the base-line concentration ratio of PCr/ATP was 0.53 +/- 0.03; 2) the average molar free energy of hydrolysis of intracellular ATP was approximately 15.0 kcal X mol-1 under control conditions, changing by less than or equal to 3% with changes in transport; and 3) the free energy of extruding 3 mol of Na+ and accumulating 2 mol of K+ was approximately 9.8 kcal X mol-1 under base-line conditions; the difference between the molar free energies of ATP hydrolysis and of transport work remained large, despite large changes in transepithelial transport. The simplest conclusion is that the Na+ pump of frog skin operates far from equilibrium.

scholarly journals Ice Thickness and Sea Depth Derived from Reflection-Seismic Measurements on the Central Part of Filchner-Ronne Ice Shelf, Antarctica

1988 ◽  
Vol 11 ◽  
pp. 14-18 ◽  
Author(s):  
J. Determann ◽  
F. Thyssen ◽  
H. Engelhardt
Keyword(s):  
Drill Hole ◽  
Ice Thickness ◽  
Ice Shelf ◽  
Reflection Seismic ◽  
Seismic Records ◽  
3D Processing ◽  
Seismic Measurements ◽  
Good Agreement ◽  
Made In

In January 1986, reflection-seismic measurements were made in the central part of Filchner-Ronne Ice Shelf, north of Henry and Korff ice rises, by a German oversnow traverse. With the help of a newly developed “ice streamer”, two people were able to obtain seismic records nearly every 5km over a distance of 150km within 3d. Processing of digitally recorded seismograms yielded profiles of ice thickness and sea depth. The ice thickness varies from 400 to 500 m and is in good agreement with the thickness of 465 m at a drill hole. The reflection-seismic results are comparable with those obtained from aerogeophysical measurements.

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