scholarly journals The Design of Earthquake Detector Using Pendulum Swing Based on ATMega328

2021 ◽  
Vol 2 (3) ◽  
Author(s):  
Ipin Prasojo ◽  
Andino Maseleno ◽  
Omar tanane ◽  
Nishith Shahu
Keyword(s):  
Pendulum Swing

The great Chinese surprise: the rupture with the United States is real and is happening

2020 ◽  
Vol 96 (2) ◽  
pp. 419-437
Author(s):  
Xiangfeng Yang
Keyword(s):  
United States ◽  
The United States ◽  
Donald Trump ◽  
Ample Evidence ◽  
Pendulum Swing ◽  
The Us ◽  
Methodological Problems ◽  
Trade War ◽  
The Stability ◽  
The Individual

Abstract Ample evidence exists that China was caught off guard by the Trump administration's onslaught of punishing acts—the trade war being a prime, but far from the only, example. This article, in addition to contextualizing their earlier optimism about the relations with the United States under President Trump, examines why Chinese leaders and analysts were surprised by the turn of events. It argues that three main factors contributed to the lapse of judgment. First, Chinese officials and analysts grossly misunderstood Donald Trump the individual. By overemphasizing his pragmatism while downplaying his unpredictability, they ended up underprepared for the policies he unleashed. Second, some ingrained Chinese beliefs, manifested in the analogies of the pendulum swing and the ‘bickering couple’, as well as the narrative of the ‘ballast’, lulled officials and scholars into undue optimism about the stability of the broader relationship. Third, analytical and methodological problems as well as political considerations prevented them from fully grasping the strategic shift against China in the US.

scholarly journals Male Veterans Coping with the Pendulum Swing of Rheumatoid Arthritis Pain

2012 ◽  
Vol 10 (1) ◽  
pp. 44-55 ◽  
Author(s):  
Cleopatra Beaton ◽  
Felicia Hodge ◽  
Adeline Nyamathi ◽  
Ari Weinred ◽  
Vickie Mays ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Los Angeles ◽  
Disease Stage ◽  
Economic Activities ◽  
Physically Active ◽  
Pendulum Swing ◽  
Male Veterans ◽  
Qualitative Descriptive ◽  
Activity Types ◽  
The Impact

This study describes the physical, psychological and social context of rheumatoid arthritis (RA) pain from the male veterans. A qualitative, descriptive design was employed using a purposive sampling to ensure representation of male veterans. Interviews were conducted with 12 male veterans of the VA Greater Los Angeles Healthcare System. Socio-demographic characteristics, clinical profiles and descriptors of rheumatoid pain experienced by male veterans’ since their diagnoses were gathered. Interviews were audio recorded and transcribed verbatim. Grounded Theory analysis techniques were used to identify concepts related to living with RA Pain. Six concepts related to RA pain adaptation emerged. Three concepts were associated with movement (keep moving, consequences of not moving, staying physically active) and three were related to emotion (thinking positive thoughts, doing jobs, focusing on male identity). The “keep moving” concept explained coping with chronic RA pain through three activity types: physical, cognitive and socio-economic activities. These activities fluctuated in intensity depending upon the disease stage and RA symptoms. The forward and backward pendulum swing described the unpredictable course and pain coping strategy of the veterans. Further studies are recommended to determine the transferability of our findings to other populations and to confirm the impact of continuous motion as an effective pain management strategy for RA.

Biosonar behavior of mustached bats swung on a pendulum prior to cortical ablation

1990 ◽  
Vol 64 (6) ◽  
pp. 1801-1817 ◽  
Author(s):  
S. J. Gaioni ◽  
H. Riquimaroux ◽  
N. Suga
Keyword(s):  
Pulse Duration ◽  
Auditory Processing ◽  
Target Identification ◽  
Frequency Component ◽  
Signal Pulse ◽  
Echo Intensity ◽  
Constant Frequency ◽  
Large Target ◽  
Pulse Intensity ◽  
Pendulum Swing

1. The biosonar signal (pulse) of the mustached bat, Pteronotus parnellii parnellii, has four harmonics (H1-4), each consisting of a long constant-frequency component (CF1-4) followed by a short frequency-modulated component (FM1-4). As the bat approaches a target, it systematically modifies its pulses to optimize the extraction of information from the echoes. These behavioral responses include 1) Doppler-shift (DS) compensation in which the bat adjusts the frequency of its pulses to correct for the DS in the echoes. This maintains the echo CF2 at a frequency to which the bat's cochlea is very sharply tuned, slightly above the CF2 frequency of the bat's pulses when it is at rest (Frest, approximately 61 kHz); 2) echo intensity compensation, in which the bat lowers its pulse intensity as it approaches a large target, thus maintaining the echo intensity within a suitable range for auditory processing; and 3) and 4) duration and rate adjustments, in which the bat first increases its pulse duration to facilitate target identification, then shortens its pulse duration while increasing its pulse rate to facilitate target analysis. 2. We examined these responses, especially DS compensation, by swinging bats on a pendulum toward a large target over a distance of 3.6 m. Eight bats were given 15-30 swings per day for 6-25 days. 1) On 97% of all swings the bats showed strong DS compensation as the pendulum approached the target. They did not show DS compensation on the backswing. 2) On 40-50% of all swings, the bats clearly displayed the other responses. The bats typically increased their pulse intensity a small amount early in the pendulum swing, then decreased pulse intensity by as much as 18 dB as the target was more closely approached. They increased their pulse intensity during the backswing. 3) Pulse duration increased from approximately 20 to 23 ms early in the forward swing, decreased to approximately 18 ms as the target was more closely approached, and then increased to 20 ms by the end of the backswing. 4) The instantaneous repetition rate increased from approximately 17 pulses/s at the start of the forward swing to approximately 28 pulses/s near the target, then decreased to approximately 10 pulses/s by the end of the backswing. Pulses usually occurred in trains of 1-2 pulses, with longer trains occasionally occurring near the target. 3. The maximum DS on the pendulum was 1.34 kHz, and the maximum DS compensation was 146 +/- 98 (SD) Hz less than this value.(ABSTRACT TRUNCATED AT 400 WORDS)

Ibn Khaldun

2011 ◽  
Author(s):  
Michael Leezenberg
Keyword(s):  
Social Sciences ◽  
North Africa ◽  
World History ◽  
Urban Life ◽  
Muslim World ◽  
Ibn Khaldun ◽  
New Science ◽  
Pendulum Swing ◽  
Swing Movement ◽  
Rural Group

Although Ibn Khaldun (b. 732/1332–d. 808/1406) does not appear to have exerted any constitutive influence on any of the founders of the modern social sciences, he is often described as a precursor or ancestor of sociology. Among others, he is the author of a voluminous world history, the Kitāb al-ʿibar or Book of Examples, part of which is a chronicle of the various local dynasties—many of them of Berber extraction—in North Africa. Another part of this work deals with other Muslim lands, and even with the non-Muslim world, making it one of the first Islamic attempts at world history. By far the most famous part of this book, however, is the Muqaddimah, or introduction, in which Ibn Khaldun formulates the principles of what he himself described as a new science serving as an auxiliary for historiography. This ʿilm al- ʿumran, or “science of civilization” as he called it, attempts to formulate general laws of history, as a principled means of establishing the veracity of historical reports. The most important of these laws is the circular, or pendulum-swing, movement between rural or tribal (badawa) societies and urban civilizations (hadara). Rural societies are bound together and strengthened by a bond of ʿasabiyya (solidarity or group spirit), which also enables them to conquer more refined urban civilizations. Once in power, however, the new dynasty will progressively become weakened by the refinements of urban life, and after several generations it will be overthrown by a new rural group still held together by its ʿasabiyya. Among contemporaries, Ibn Khaldun’s ideas did not generate much interest, but in later centuries he has been read with great interest by both scholars and policymakers, and both inside and outside the Muslim world.

scholarly journals Dynamic Responses of an Overhead Crane’s Beam Subjected to a Moving Trolley with a Pendulum Payload

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Huasen Liu ◽  
Wenming Cheng ◽  
Yinqi Li
Keyword(s):  
Integral Method ◽  
Lagrange Equation ◽  
Dynamic Responses ◽  
Underactuated System ◽  
Beam Model ◽  
Moving Mass ◽  
Overhead Crane ◽  
Precise Positioning ◽  
Pendulum Swing ◽  
Coupling System

An overhead crane with a flexible cable is an underactuated system; the vibration of the crane’s beam and the residual swinging of the payloads cause fatigue in the crane and affect the precise positioning of the payloads. In this paper, the coupling system of an overhead crane was simplified to that of a moving mass with pendulum swing passing beam model. The differential equation motion of a coupled overhead crane system was derived based on the Lagrange equation. Mathematical solution was carried out by using the Newmark-β integral method. The influences of the trolley’s acceleration and the parameters of the payloads on the vibration of the beam and the payloads’ swing were, respectively, analyzed. A numerical analysis of the results indicates that increasing the mass of the payloads leads to a larger deflection of the beam, whereas increasing the speed and acceleration of the trolley does not obviously influence the maximum deflection of the central beam.

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