scholarly journals XV.—Results of the Makerstoun Observations, No. II. On the Relation of the Varitions of the Vertical Component of the Earth's Magnetic Intensity to the Solar and Lunar Periods

1846 ◽  
Vol 16 (2) ◽  
pp. 137-144
Author(s):  
J. Allan Broun
Keyword(s):  
Vertical Component ◽  
Horizontal Component ◽  
Vertical Force ◽  
Magnetic Intensity ◽  
Long Period ◽  
Accurate Interpretation ◽  
Magnetic Needle ◽  
The Way

The following results are deduced from the observations of the balance or vertical force magnetometer, which consists of a magnetic needle, balanced horizontally, and resting, by a knife-edged axle, on agate planes. Much doubt has been entertained as to this instrument's capability of shewing changes of moderate nicety, and it has been considered altogether unavailable for changes of long period: it has been shewn (Vol. XVI., p. 67), that there are several difficulties in the way of an accurate interpretation of the observations, independent of the instrumental capacity. If it be added, that disturbances seem to affect the daily means of the vertical component, in a more serious way than they do those of the horizontal component, it will be seen that there are a series of difficulties, which tend to render good and consistent results from the balance magnetometer nearly unattainable. It will be judged afterwards how far these difficulties have been overcome in the present instance.

scholarly journals 3. Results of the Makerstoun Observations, No. II. On the Relation of the Variations of the Vertical Component of the Earth's Magnetic Intensity to the Solar and Lunar Periods.

1851 ◽  
Vol 2 ◽  
pp. 97-98
Author(s):  
J. Allan Broun
Keyword(s):  
Vertical Component ◽  
Vertical Force ◽  
Magnetic Intensity

The following results are deduced from the observations of the balance or vertical force magnetometer described in the Introduction to the Makerstoun Observations. The observations were corrected for temperature by a method previously described.

scholarly journals A magnetometer for the measurement of the Earth's vertical magnetic intensity in C. G. S. measure

1928 ◽  
Vol 117 (777) ◽  
pp. 434-458 ◽  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Vertical Component ◽  
Field Measurements ◽  
Horizontal Component ◽  
Magnetic Intensity ◽  
Earth’S Magnetic Field ◽  
Simple Operation ◽  
Horizontal Field ◽  
Earth's Magnetic Field

The measurement of the vertical component of the earth’s magnetic field is a less simple operation than that of the horizontal component. The horizontal field measurements are on a satisfactory basis, whether made by the swinging magnet method, or by the more recently developed electric magnetometers, in which known magnetic fields may be provided by means of known currents flowing through coils of known dimensions.

scholarly journals Mechanical Behavior of a Multisegmented Tower Anchorage Structure with an Exposed Steel Anchor Box

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Wenru Lu ◽  
Min Zhao ◽  
Lingling Jia
Keyword(s):  
Mechanical Behavior ◽  
High Stress ◽  
Vertical Component ◽  
Horizontal Component ◽  
Vertical Shear ◽  
Vertical Force ◽  
Side Plate ◽  
Single Segment ◽  
End Plate ◽  
Cable Force

A tower anchorage structure with an exposed steel anchor box is commonly used for cable-stayed bridges. Many researchers have conducted studies on this structure by considering a single segment. However, in practical engineering, the stress of multisegmented tower anchorage structure is not completely similar to that of single segment, and the forces between segments affect each other. Hence, in this study, the mechanical behavior of a multisegment anchorage structure with an exposed steel anchor box was investigated via finite element analysis. Furthermore, the load transfer path and stress distribution characteristics of the structure were investigated. The results indicate that the horizontal component of the cable force is borne by the side plate of the steel anchor box, the diaphragm, and the side wall of the concrete tower column, while the vertical component is transmitted by the steel anchor box and concrete tower column. Under the action of this cable force, the horizontal component of the cable force borne by the middle segment increases, while the components at the two end segments decrease. The vertical force is greater on the lower tower segments. The stress levels on the side plate and on the diaphragm of the steel anchor box in the middle section are high. Under the cable force load, the frame formed by the end plate and side plate of the steel anchor box expands outward. The end plate is mainly under a tensile load, and the tensile stress level on the lower section exceeds that on the upper section. A high-stress area for the concrete tower is observed in the steel-concrete joint. The stud group of the anchorage structure is subjected to horizontal and vertical shear forces, and no “saddle-shaped” distribution of the stud shear is found. An optimal arrangement method for the stud group was proposed to optimize its mechanical performance.

scholarly journals IX.—On the Balance Magnetometer, and its Temperature Corrections

1845 ◽  
Vol 16 (1) ◽  
pp. 67-78
Author(s):  
J. A. Broun
Keyword(s):  
Vertical Component ◽  
Magnetic Intensity ◽  
Magnetic Meridian ◽  
Magnetic Needle

The Balance Magnetometer was imagined by Dr H. Lloyd, of Dublin, for the purpose of observing the variations of the vertical component of the earth's magnetic intensity. It consists simply of a balanced magnetic needle, with a knife-edged axle, resting on agate planes, at right angles to the plane of the magnetic meridian. In the instrument from which the results in this paper are deduced, the position of the needle is observed by means of micrometer microscopes.

Edward J. Johnson and the early History of Ship Magnetism

1979 ◽  
Vol 32 (3) ◽  
pp. 415-421
Author(s):  
Charles H. Cotter
Keyword(s):  
Early History ◽  
Total Weight ◽  
Magnetic Intensity ◽  
Wrought Iron ◽  
Crucial Problem ◽  
Malleable Iron ◽  
History Of ◽  
The City ◽  
Magnetic Needle ◽  
The Way

During the months of October and November 1835 a series of magnetic observations was made, under orders of the Lords Commissioners of the Admiralty, on board the iron steamship Garryowen by Commander Edward J. Johnson R.N. The results of Johnson's observations paved the way to Airy's solution to the crucial problem of compass management on board an iron ship.Johnson related in a paper in which he described his experiments, that he proceeded to Ireland taking with him the necessary instruments for ascertaining the deviation of the magnetic needle produced by the local attraction of an iron steam-vessel, together with instruments for measuring dip and magnetic intensity. Every facility was afforded him by the owners of the Garryowen, the City of Dublin Steam Packet Company, and by the builders of the vessel, Messrs. Laird of Liverpool.The Garryowen, built in 1833, was a paddle steamer of length 130 ft, breadth 21 ft 6 in and depth 11 ft. She was equipped with two engines each rated at 85 h.p. and her tonnage was 281 tons burden. She was fitted with four water-tight transverse bulkheads of wrought-iron ¼ in thick. Her hull and boilers were of malleable iron and the total weight of iron in her structure amounted to 180 tons.

Galilean Relativity

2018 ◽  
Author(s):  
David M. Wittman
Keyword(s):  
Inertial Frame ◽  
Vertical Component ◽  
Horizontal Component ◽  
The Other ◽  
One Dimension ◽  
Everyday Experience ◽  
Low Speed ◽  
Principle Of Relativity ◽  
Galilean Relativity ◽  
Laws Of Motion

Galilean relativity is a useful description of nature at low speed. Galileo found that the vertical component of a projectile’s velocity evolves independently of its horizontal component. In a frame that moves horizontally along with the projectile, for example, the projectile appears to go straight up and down exactly as if it had been launched vertically. The laws of motion in one dimension are independent of any motion in the other dimensions. This leads to the idea that the laws of motion (and all other laws of physics) are equally valid in any inertial frame: the principle of relativity. This principle implies that no inertial frame can be considered “really stationary” or “really moving.” There is no absolute standard of velocity (contrast this with acceleration where Newton’s first law provides an absolute standard). We discuss some apparent counterexamples in everyday experience, and show how everyday experience can be misleading.

Belief and the Will

Philosophy ◽  
1972 ◽  
Vol 47 (180) ◽  
pp. 95-112 ◽  
Author(s):  
Anthony O'Hear
Keyword(s):  
Long Period ◽  
General Account ◽  
The Will ◽  
Will Power ◽  
The Way

In this article, we will consider how far we might be said to be active in forming our beliefs; in particular, we will ask to what extent we can be said to be free in believing what we want to believe. It is clear that we ought to believe only what is really so, at least in so far as it lies in our power to determine this, but reflection shows that, regrettably, we do not confine our beliefs to what we have evidence for, nor do we always believe in accordance with the evidence we do have. So it is natural to conclude that non-intellectual factors may be at work here; such, at least, was the view of Descartes, who attributed error to the influence of our will in leading us to assent to judgments which go beyond the evidence presented by our infallible intellect. This view has some initial plausibility when we think of cases in which emotional considerations lead people to take up and genuinely believe things they have no evidence for, but it is not a view which has received much support from modern philosophers. So, in Part 1 we will look at criticisms levelled against Descartes' view by J. L. Evans, and in Part 2 we will see how far Descartes can be defended. Our conclusions here will lead us to give in Part 3 a general account of the influence of the will in beliefs. We will suggest that we are always responsible for our explicit beliefs, even though it is not true that we can simply believe what we like. Thus we will reject the idea that a man can consciously know something, and at the same time, by will power, believe the opposite. Belief is not then totally free, but we will argue that people do sometimes form beliefs which go against what they should and could believe, and that this can in a way be put down to the influence of the will. Finally we will consider some of the ways in which it is possible to influence our beliefs by willed acts over a long period of time, though this is not the way that we clami that the will might be said to play a part in every judgment that we make.

scholarly journals FxLMS Method for Suppressing In-Wheel Switched Reluctance Motor Vertical Force Based on Vehicle Active Suspension System

2014 ◽  
Vol 2014 ◽  
pp. 1-16 ◽  
Author(s):  
Yan-yang Wang ◽  
Yi-nong Li ◽  
Wei Sun ◽  
Chao Yang ◽  
Guang-hui Xu
Keyword(s):  
Vertical Component ◽  
Active Suspension ◽  
Radial Force ◽  
Suspension System ◽  
Vertical Force ◽  
Least Mean Square ◽  
Active Suspensions ◽  
Switched Reluctance ◽  
Resonance Frequencies ◽  
Suspension Performance

The vibration of SRM obtains less attention for in-wheel motor applications according to the present research works. In this paper, the vertical component of SRM unbalanced radial force, which is named as SRM vertical force, is taken into account in suspension performance for in-wheel motor driven electric vehicles (IWM-EV). The analysis results suggest that SRM vertical force has a great effect on suspension performance. The direct cause for this phenomenon is that SRM vertical force is directly exerted on the wheel, which will result in great variation in tyre dynamic load and the tyre will easily jump off the ground. Furthermore, the frequency of SRM vertical force is broad which covers the suspension resonance frequencies. So it is easy to arouse suspension resonance and greatly damage suspension performance. Aiming at the new problem, FxLMS (filtered-X least mean square) controller is proposed to improve suspension performance. The FxLMS controller is based on active suspension system which can generate the controllable force to suppress the vibration caused by SRM vertical force. The conclusion shows that it is effective to take advantage of active suspensions to reduce the effect of SRM vertical force on suspension performance.

Navigating in a volumetric world: Metric encoding in the vertical axis of space

2013 ◽  
Vol 36 (5) ◽  
pp. 546-547 ◽  
Author(s):  
Theresa Burt de Perera ◽  
Robert Holbrook ◽  
Victoria Davis ◽  
Alex Kacelnik ◽  
Tim Guilford
Keyword(s):  
Spatial Information ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Vertical Component ◽  
Vertical Axis ◽  
Orthogonal Axis ◽  
Experimental Protocols ◽  
Three Dimensional Space ◽  
The Way

AbstractAnimals navigate through three-dimensional environments, but we argue that the way they encode three-dimensional spatial information is shaped by how they use the vertical component of space. We agree with Jeffery et al. that the representation of three-dimensional space in vertebrates is probably bicoded (with separation of the plane of locomotion and its orthogonal axis), but we believe that their suggestion that the vertical axis is stored “contextually” (that is, not containing distance or direction metrics usable for novel computations) is unlikely, and as yet unsupported. We describe potential experimental protocols that could clarify these differences in opinion empirically.

Peripheral representation of antennal orientation by the scapal hair plate of the cockroach Periplaneta americana

2001 ◽  
Vol 204 (24) ◽  
pp. 4301-4309 ◽  
Author(s):  
J. Okada ◽  
Y. Toh
Keyword(s):  
Single Unit ◽  
Periplaneta Americana ◽  
Vertical Component ◽  
Horizontal Component ◽  
Vertical Position ◽  
Horizontal Position ◽  
Joint Movement ◽  
Basal Segment ◽  
Dynamic Phase ◽  
Hair Sensilla

SUMMARY Arthropods have hair plates that are clusters of mechanosensitive hairs, usually positioned close to joints, which function as proprioceptors for joint movement. We investigated how angular movements of the antenna of the cockroach (Periplaneta americana) are coded by antennal hair plates. A particular hair plate on the basal segment of the antenna, the scapal hair plate, can be divided into three subgroups: dorsal, lateral and medial. The dorsal group is adapted to encode the vertical component of antennal direction, while the lateral and medial groups are specialized for encoding the horizontal component. Of the three subgroups of hair sensilla, those of the lateral scapal hair plate may provide the most reliable information about the horizontal position of the antenna, irrespective of its vertical position. Extracellular recordings from representative sensilla of each scapal hair plate subgroup revealed the form of the single-unit impulses in response to hair deflection. The mechanoreceptors were characterized as typically phasic-tonic. The tonic discharge was sustained indefinitely (>20 min) as long as the hair was kept deflected. The spike frequency in the transient (dynamic) phase was both velocity- and displacement-dependent, while that in the sustained (steady) phase was displacement-dependent.

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