scholarly journals XII. A remarkable conformation, or lusus naturæ, in a child

1743 ◽  
Vol 42 (464) ◽  
pp. 152-154
Keyword(s):  
Repeated Observations ◽  
Present Subject

About <italic>April</italic> 1741. one <italic>Sarah Allen</italic> of the Parish of <italic>St. Blazy</italic>, near <italic>Truro</italic>; having been married near Four Years, and Mother of Two Children, well-formed and living, was brought to-bed of my present Subject, but of so remarkable and preternatural a Constitution, as must render its whole Life inevitably miserable, the Par­ticulars whereof, from my repeated Observations, are as follows

PEMBELAJARAN E-LEARNING

2019 ◽  
Vol 2 ◽  
Author(s):  
Nuke Lulu Ul Chusna
Keyword(s):  
Subject Matter ◽  
Technological Progress ◽  
Learning Culture ◽  
Learning System ◽  
Internet Technology ◽  
The Internet ◽  
Digital Format ◽  
E Learning ◽  
Context Of Learning ◽  
Present Subject

The internet can be used as a way to transfer knowledge from teachers to students. Learning that utilizes the development of technology and information, namely the internet, one of which is the e-learning learning system. E-learning is a form of conventional learning that is transferred in digital format through internet technology, not only to present subject matter on the internet but also must be in accordance with the principles of learning.The e-learning learning model results in changes in learning culture in the context of learning. Learning becomes very flexible, because it can be adjusted to the availability of time from students in learning the material provided by the teacher.The teacher determines the success of students in learning, therefore teachers are required to have the ability to adapt to technological progress. Keywords: ICT,e-learning, e-learning learning

scholarly journals Detection of small hydrological variations in gravity by repeated observations with relative gravimeters

2007 ◽  
Vol 82 (9) ◽  
pp. 543-553 ◽  
Author(s):  
M. Naujoks ◽  
A. Weise ◽  
C. Kroner ◽  
T. Jahr
Keyword(s):  
Repeated Observations

scholarly journals Repeated observations of cetaceans and carcharhiniformes associations in the Red Sea

2015 ◽  
Vol 46 (1) ◽  
pp. 25-26 ◽  
Author(s):  
Till Röthig ◽  
Julia L. Y. Spaet ◽  
Alexander Kattan ◽  
Isabelle K. Schulz ◽  
May Roberts ◽  
...  
Keyword(s):  
Red Sea ◽  
Repeated Observations

scholarly journals VII. A memoir on cubic surfaces

1869 ◽  
Vol 159 ◽  
pp. 231-326 ◽  
Keyword(s):  
Singular Points ◽  
Third Order ◽  
Cubic Surface ◽  
The Third ◽  
Cubic Surfaces ◽  
Present Subject

The present Memoir is based upon, and is in a measure supplementary to that by Pro­fessor Schläfli, “On the Distribution of Surfaces of the Third Order into Species, in reference to the presence or absence of Singular Points, and the reality of their Lines,” Phil. Trans, vol. cliii. (1863) pp. 193—241. But the object of the Memoir is different. I disregard altogether the ultimate division depending on the reality of the lines, attend­ing only to the division into (twenty-two, or as I prefer to reckon it) twenty-three cases depending on the nature of the singularities. And I attend to the question very much on account of the light to be obtained in reference to the theory of Reciprocal Surfaces. The memoir referred to furnishes in fact a store of materials for this purpose, inasmuch as it gives (partially or completely developed) the equations in plane-coordinates of the several cases of cubic surfaces, or, what is the same thing, the equations in point-coor­dinates of the several surfaces (orders 12 to 3) reciprocal to these repectively. I found by examination of the several cases, that an extension was required of Dr. Salmon’s theory of Reciprocal Surfaces in order to make it applicable to the present subject ; and the preceding “Memoir on the Theory of Reciprocal Surfaces” was written in connexion with these investigations on Cubic Surfaces. The latter part of the Memoir is divided into sections headed thus:— “Section I = 12, equation (X, Y, Z, W ) 3 = 0” &c. referring to the several cases of the cubic surface; but the paragraphs are numbered continuously through the Memoir. The twenty-three Cases of Cubic Surfaces—Explanations and Table of Singularities . Article Nos. 1 to 13. 1. I designate as follows the twenty-three cases of cubic surfaces, adding to each of them its equation:

On the Mortality arising from Naval Operations

1856 ◽  
Vol 6 (5) ◽  
pp. 254-277
Author(s):  
William Barwick Hodge
Keyword(s):  
Point Of View ◽  
Accurate Information ◽  
Loss Of Life ◽  
The Public ◽  
Naval Operations ◽  
Present Subject

To ascertain with precision the loss of life occasioned by war is an object of so much importance in every point of view, whether national or social, that whatever apology may be required for the manner in which the present subject is treated, none can be necessary for bringing it forward.That so little should have been done towards the elucidation of the question, is no doubt partly attributable to the difficulty of obtaining accurate information with respect to it, but in a greater degree, perhaps, to the reluctance to dwell upon it felt by the public.

scholarly journals Experimental Study on 3D Measurement Accuracy Detection of Low Altitude UAV for Repeated Observation of an Invariant Surface

Processes ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 4
Author(s):  
Sha Gao ◽  
Shu Gan ◽  
Xiping Yuan ◽  
Rui Bi ◽  
Raobo Li ◽  
...  
Keyword(s):  
Experimental Study ◽  
Unmanned Aerial Vehicle ◽  
Structure From Motion ◽  
Measurement Accuracy ◽  
Test Plot ◽  
3D Measurement ◽  
Difference Model ◽  
Repeated Observations ◽  
Aerial Vehicle ◽  
Low Altitude

Low-altitude unmanned aerial vehicle (UAV) photogrammetry combined with structure-from-motion (SFM) algorithms is the latest technological approach to imaging 3D stereo constructions. At present, derivative products have been widely used in landslide monitoring, landscape evolution, glacier movement, volume measurement, and landscape change detection. However, there is still a lack of research into the accuracy of 3D data positioning based on the structure-from-motion of unmanned aerial vehicle (UAV-SFM) technology, itself, which can affect the measurable effectiveness of the results in further applications of this technological approach. In this paper, validation work was carried out for the DJI Phantom 4 RTK UAV, for earth observation data related to 3D positioning accuracy. First, a test plot with a relatively stable surface was selected for repeated flight imaging observations. Specifically, three repeated flights were performed on the test plot to obtain three sorties of images; the structure from motion and multi-view stereo (SFM-MVS) key technology was used to process and construct a 3D scene model, and based on this model the digital surface model (DSM) and digital orthophoto map (DOM) data of the same plot with repeated observations were obtained. In order to check the level of 3D measurement accuracy of the UAV technology itself, a window selection-based method was used to sample the point cloud set data from the three-sortie repeat observation 3D model. The DSM and DOM data obtained from three repeated flights over the surface invariant test plots were used to calculate the repeat observation 3D point errors, taking into account the general methodology of redundant observation error analysis for topographic surveys. At the same time, to further analyze the limits of the UAV measurement technique, possible under equivalent observation conditions with the same processing environment, a difference model (DOD) was constructed for the DSM data from three sorties, to deepen the overall characterization of the differences between the DSMs obtained from repeated observations. The results of the experimental study concluded that both the analysis of the 3D point set measurements based on window sampling and the accuracy evaluation using the difference model were generally able to achieve a centimeter level of planimetric accuracy and vertical accuracy. In addition, the accuracy of the surface-stabilized hardened ground was better, overall, than the accuracy of the non-hardened ground. The results of this paper not only probe the measurement limits of this type of UAV, but also provide a quantitative reference for the accurate control and setting of an acquisition scheme of the UAV-based SfM-MVS method for geomorphological data acquisition and 3D reconstruction.

scholarly journals ANTHROPOGENIC INFLUENCE OF THE KOMSOMOLSK OIL AND GAS CONDENSATE FIELD ON MODERN DEFORMATION PROCESSES

2018 ◽  
pp. 11-20 ◽  
Author(s):  
Yu. V. Vasilev ◽  
D. A. Misyurev ◽  
A. V. Filatov
Keyword(s):  
Oil And Gas ◽  
Gas Production ◽  
Gas Condensate ◽  
Industrial Safety ◽  
Subsidence Trough ◽  
Oil And Gas Production ◽  
Field Development ◽  
Repeated Observations ◽  
Deformation Processes ◽  
The Relationship

The authors created a geodynamical polygon on the Komsomolsk oil and gas condensate field to ensure the industrial safety of oil and gas production facilities. The aim of its creation is mul-tiple repeated observations of recent deformation processes. Analysis and interpretation of the results of geodynamical monitoring which includes class II leveling, satellite observations, radar interferometry, exploitation parameters of field development provided an opportunity to identify that the conditions for the formation of recent deformations of the earth’s surface is an anthropogenic factor. The authors identified the relationship between the formation of subsidence trough of the earth’s surface in the eastern part of the field with the dynamics of accumulated gas sampling and the fall of reservoir pressures along the main reservoir PK1 (Cenomanian stage).

scholarly journals No one accelerometer-based physical activity data collection protocol can fit all research questions

2019 ◽  
Author(s):  
Patrick Bergman ◽  
Maria Hagströmer
Keyword(s):  
Physical Activity ◽  
Sample Size ◽  
Large Sample Size ◽  
Intensity Level ◽  
Sample Sizes ◽  
Activity Data ◽  
Convenience Sample ◽  
Mean Values ◽  
Repeated Observations ◽  
Measurement Protocol

Abstract BACKGROUND Measuring physical activity and sedentary behavior accurately remains a challenge. When describing the uncertainty of mean values or when making group comparisons, minimising Standard Error of the Mean (SEM) is important. The sample size and the number of repeated observations within each subject influence the size of the SEM. In this study we have investigated how different combinations of sample sizes and repeated observations influence the magnitude of the SEM. METHODS A convenience sample were asked to wear an accelerometer for 28 consecutive days. Based on the within and between subject variances the SEM for the different combinations of sample sizes and number of monitored days was calculated. RESULTS Fifty subjects (67% women, mean±SD age 41±19 years) were included. The analyses showed, independent of which intensity level of physical activity or how measurement protocol was designed, that the largest reductions in SEM was seen as the sample size were increased. The same magnitude in reductions to SEM was not seen for increasing the number of repeated measurement days within each subject. CONCLUSION The most effective way of reducing the SEM is to have a large sample size rather than a long observation period within each individual. Even though the importance of reducing the SEM to increase the power of detecting differences between groups is well-known it is seldom considered when developing appropriate protocols for accelerometer based research. Therefore the results presented herein serves to highlight this fact and have the potential to stimulate debate and challenge current best practice recommendations of accelerometer based physical activity research.

scholarly journals Metode Pembelajaran Al-Ashwat

2018 ◽  
Vol 4 (2) ◽  
pp. 199-218
Author(s):  
Nuril Mufidah
Keyword(s):  
Learning Process ◽  
Subject Matter ◽  
Essential Role ◽  
Communication Process ◽  
Learning Methods ◽  
Crucial Element ◽  
Present Subject

In Arabic learning, al-Ashwat plays an essential role because al-Ashwat or phonetic is a crucial element in every language. If al-Ashwat is not well understood, Arabic proficiency cannot be mastered perfectly. Often there will be a lack of understanding in the language process. So that the communication process will also be hampered. Learning methods are a way or means to present subject matter. With learning, the approach can simplify and accelerate the learning process towards understanding. There are at least two learning methods that pay attention to the teaching of sound language, including Phonetic Method and Mim-mem Method which is better known as an Audio-Lingual Method.

scholarly journals I. On the Action of Transparent Bodies upon the differently coloured Rays of Light

1818 ◽  
Vol 8 (1) ◽  
pp. 1-23
Author(s):  
David Brewster
Keyword(s):  
Natural Philosophy ◽  
To Receive ◽  
Present Subject ◽  
Made In

From the intimate connexion of the present subject with the improvement of the Achromatic Telescope, it must be admitted to be one of the most important in Optics; while, from the minuteness of the effects which are to be observed and compared, it is unquestionably one of the most difficult. From this cause very little progress has been made in the investigation. The irrationality of the coloured spaces, in prismatic spectra, formed by different substances, has not even been mentioned in any of our elementary treatises on Natural Philosophy, and there are some philosophers who have scrupled to receive it as a truth established in Physics.

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