scholarly journals Harmonical oscillator and electro-mechanical analogy: an interdiscinary experiment to high precision mass variation measurements

2009 ◽  
Vol 34 (3) ◽  
pp. 57-75
Author(s):  
Ailton M. Watanabe ◽  
Adriano dos Santos ◽  
Paulo R. Bueno
Keyword(s):  
High Precision ◽  
Mass Variation ◽  
Basic Approach ◽  
Biology Students ◽  
Mechanical Analogy ◽  
Physics Courses ◽  
Physics Concepts ◽  
Made In

In general, the traditional Physics courses needs examples of the aplications of the Physics concepts in other areas such as Chemistry and Biology. This lacks tend to demotivate Chemistry and Biology students regarding to deal with Physical concepts developed in classroom. In this work, the analogy among mechanic and electric oscillators is investigated to be applied in Chemistry and Biology areas, showing to be valuable due to its aplication in techniques that aims to measure mass variation with high precision. This measure could be made in a direct or indirect way. These techniques are known as electrogravimetric techniques and they are important in biosensor aplications. Thus, this paper explores the electromechanic analogy in an interdisciplinary way involving areas like Physics, Chemistry and Biology. Based on this analogy, it is proposed an experiment that can be applied in different ways, i.e. by an basic approach or more deeper, depending on the students specific formation, in other words, Physics, Chemistry or Biology.

scholarly journals 57 Harmonical oscillator and electro-mechanical analogy: an interdiscinary experiment to high precision mass variation measurements

2018 ◽  
Vol 34 (3) ◽  
pp. 57
Author(s):  
Ailton Massaiti Watanabe ◽  
Adriano Dos Santos ◽  
Paulo Roberto Bueno
Keyword(s):  
High Precision ◽  
Mass Variation ◽  
Basic Approach ◽  
Biology Students ◽  
Mechanical Analogy ◽  
Physics Courses ◽  
Physics Concepts ◽  
Made In

In general, the traditional Physics courses needs examples of the aplications of the Physics concepts in other areas such as Chemistry and Biology. This lacks tend to demotivate Chemistry and Biology students regarding to deal with Physical concepts developed in classroom. In this work, the analogy among mechanic and electric oscillators is investigated to be applied in Chemistry and Biology areas, showing to be valuable due to its aplication in techniques that aims to measure mass variation with high precision. This measure could be made in a direct or indirect way. These techniques are known as electrogravimetric techniques and they are important in biosensor aplications. Thus, this paper explores the electromechanic analogy in an interdisciplinary way involving areas like Physics, Chemistry and Biology. Based on this analogy, it is proposed an experiment that can be applied in different ways, i.e. by an basic approach or more deeper, depending on the students specific formation, in other words, Physics, Chemistry or Biology.

FIB Micromachining and Nano-Structure Fabrication

1999 ◽  
Author(s):  
Raymond A. Lee ◽  
Patrick J. Wolpert
Keyword(s):  
High Precision ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Biological Applications ◽  
Optical Lens ◽  
Nano Structure ◽  
Beam System ◽  
Afm Tips ◽  
Established Technique ◽  
Made In

Abstract FIB Micromachining has long been an established technique, but until recently it has been overshadowed by the more mainstream semiconductor application of the Focused Ion Beam system. Nano- Structure fabrication using the FIB system has become more popular recently due to several factors. The need for sub-micron structures have grown significantly due to a need for enhanced optical and biological applications. Another reason for the growth in micromachining is the improvement made in the ability of FIB systems to produce geometric shapes with high precision. With the latest high-end FIB systems, it is possible to produce microstructures with tens of nano-meters of precision. Optical lens, AFM tips, and nano-apertures are all part of the growing application for FIB Micromachining. This paper will discuss the ability and limitations of the FIB system and some possible application for FIB Micromachining.

Graticule Ruling in Australia

1949 ◽  
Vol 160 (1) ◽  
pp. 145-153
Author(s):  
Mansergh Shaw
Keyword(s):  
High Precision ◽  
Etching Process ◽  
The Other ◽  
Geographic Isolation ◽  
Precision Machines ◽  
Glass Blank ◽  
Complete Process ◽  
Better Than ◽  
Made In

The problems of precision manufacture in Australia, arising chiefly from her geographic isolation, are first discussed. The paper then takes one particular problem from the field of optical manufacture and shows how it was solved for the conditions prevailing in the Dominion. The problem discussed is the production of graticules, or reticles, for range-finders, predictors, gun sights, telescopes, binoculars, microscopes, collimators, and many other such instruments. The first part of the paper deals briefly with methods used in reproducing the pattern, particularly the ruling and etching process. The second, and much the larger, part of the paper deals with the design of the high precision machines which were made for ruling the glass disks preparatory to etching the pattern into the glass. Two such machines were developed, one generating the pattern from the movements of the machine itself, the other, a pantograph, by copying the pattern from master plates. A series of self-checking tests is described by which the accuracy of the generating machine could rapidly be tested to an accuracy of much better than 0·0001 inch. A brief survey of the complete process, from glass blank to finished graticule, is made in the Appendix.

scholarly journals A Novel Method of Monitoring Surface Subsidence Law Based on Probability Integral Model Combined with Active and Passive Remote Sensing Data

2022 ◽  
Vol 14 (2) ◽  
pp. 299
Author(s):  
Rui Wang ◽  
Kan Wu ◽  
Qimin He ◽  
Yibo He ◽  
Yuanyuan Gu ◽  
...  
Keyword(s):  
High Precision ◽  
Remote Sensing Data ◽  
Deformation Field ◽  
Integral Model ◽  
Passive Remote Sensing ◽  
Working Face ◽  
Probability Integral ◽  
Complete Deformation ◽  
Sbas Insar ◽  
Made In

For the accurate and high-precision measurement of the deformation field in mining areas using different data sources, the probability integral model was used to process deformation data obtained from an Unmanned Aerial Vehicle (UAV), Differential InSAR (DInSAR), and Small Baseline Subset InSAR (SBAS-InSAR) to obtain the complete deformation field. The SBAS-InSAR, DInSAR, and UAV can be used to obtain small-scale, mesoscale, and large-scale deformations, respectively. The three types of data were all superimposed by the Kriging interpolation, and the deformation field was integrated using the probability integral model to obtain the complete high-precision deformation field with complete time series in the study area. The study area was in the WangJiata mine in Western China, where mining was carried out from 12 July 2018 to 25 October 2018, on the 2S201 working face. The first observation was made in June 2018, and steady-state observations were made in April 2019, totaling four UAV observations. During this period, the Canadian Earth Observation Satellite of Radarsat-2 (R2) was used to take 10 SAR images, the surface subsidence mapping was undertaken using DInSAR and SBAS-InSAR techniques, and the complete deformation field of the working face during the 106-day mining period was obtained by using the UAV technique. The results showed that the subsidence basin gradually expanded along the mining direction as the working face advanced. When the mining advance was greater than 1.2–1.4 times the coal seam burial depth, the supercritical conditions were reached, and the maximum subsidence stabilized at the value of 2.780 m. The subsidence rate was basically maintained at 0.25 m/d. Finally, the accuracy of the method was tested by the Global Navigation Satellite System (GNSS) data, and the medium error of the strike was 0.103 m. A new method is reached by the fusion of active and passive remote sensing data to construct efficient, complete and high precision time-series subsidence basins with high precision.

Experimental Evaluation of the Hysteretic Damping of Elastomeric Systems at Low-Cyclic Harmonic Kinematic Displacements

2013 ◽  
Vol 430 ◽  
pp. 323-328
Author(s):  
Vasile Ovidiu
Keyword(s):  
Hysteresis Loop ◽  
High Precision ◽  
Experimental Evaluation ◽  
Hysteretic Behavior ◽  
Digital Form ◽  
Hysteretic Damping ◽  
Analogical Representation ◽  
European Standards ◽  
Physical Signal ◽  
Made In

The paper presents the experimental results regarding the hysteretic behavior of elastomeric systems made in conformity with the European Standards SR EN 1337-3 and SR EN 15129. It is also mentioned that the hysteretic damping was determined by experimentally raising the hysteresis loop in a low-cycle harmonic regime, with a kinematic exterior excitation defined by a harmonic displacement law. In this context, it is mentioned that the area of the hysteretic loops was determined instrumentally (in analogical representation of the signals) as well as under digital form, through a sampling of the physical signal, which allows a high precision of the determination.

scholarly journals High Precision Electon Beam Polarimetry

2016 ◽  
Vol 40 ◽  
pp. 1660085
Author(s):  
D. Dutta
Keyword(s):  
Electron Beam ◽  
High Precision ◽  
Particle Physics ◽  
Degrees Of Freedom ◽  
Future Application ◽  
New Ideas ◽  
Physics Experiments ◽  
Made In

Over the last three decades high precision electron beam polarimetry has been at the fore-front of progress made in leveraging the spin degrees of freedom in nuclear and particle physics experiments. We review the three main types of polarimeters, Compton, Møller and Mott, that are typically used in experiments. We discuss some of the recent results in high precision electron polarimetry and some of the new ideas that are being explored for future application at current and proposed accelerators.

scholarly journals Cosmic acceleration from varying masses in five dimensions

2016 ◽  
Vol 25 (01) ◽  
pp. 1650009 ◽  
Author(s):  
P. H. R. S. Moraes
Keyword(s):  
Space Time ◽  
Cosmic Acceleration ◽  
Expansion Velocity ◽  
Mass Variation ◽  
Five Dimensions ◽  
Matter Theory ◽  
Cosmological Solutions ◽  
Theory Of Gravity ◽  
The Universe ◽  
Made In

Much effort has been made in trying to solve or at least evade the inconsistencies that emerge from general relativity as the framework for a cosmological model. The extradimensional models rise as superb possibilities in this regard. In this work, I present cosmological solutions for Wesson’s space–time–matter theory of gravity. A relation between mass variation at cosmological scales and the expansion velocity of the universe is obtained. Such a relation yields novel features on space–time–matter theory of gravity, which are carefully discussed.

scholarly journals Students’ Attitude and Interest as Correlates of Students’ Academic Performance in Biology in Senior Secondary School

2016 ◽  
Vol 4 (3) ◽  
pp. 40-45 ◽  
Author(s):  
AWODUN ADEBISI OMOTADE ◽  
ADEKUNLE Rachael Funke ◽  
FEMI-ADEOYE Kudirat Oyewumi
Keyword(s):  
Academic Performance ◽  
Significant Relationship ◽  
Continuous Assessment ◽  
Validity And Reliability ◽  
Biology Students ◽  
Senior Secondary ◽  
Descriptive Survey ◽  
The Relationship ◽  
Made In ◽  
Assessment Results

The study examined the relationship in the students’ attitude to Biology and students’ interest and academic performance of student in Biology in Ekiti State, Nigeria. Students for the study were two hundred (200) SS II Biology students randomly drawn from five secondary schools in Ado Local Government Area of Ekiti State. The research design adopted was a descriptive survey research which was questionnaire based and past terminal continuous assessment results of the students involved in the study. The instruments used to collect relevant data from the students were Biology Attitudinal Scale (BAS), Biology Interest Scale (BIS) and terminal continuous assessment results. The instruments were subjected to validity and reliability mechanism. Pearson Product Moment correlation(r) statistical analysis was used to analysed the two null hypotheses formulated for the study. The findings showed that there is significant relationship in the students’ attitude to Biology and students’ academic performance in Biology, and the findings also revealed that there is significant relationship in the students’ interest in Biology and students’ academic performance in Biology. Conclusion and recommendations were also made in this paper.

scholarly journals Type Synthesis Principle and Practice of Flexure Systems in the Framework of Screw Theory: Part III—Numerations and Synthesis of Flexure Mechanisms

2010 ◽  
Author(s):  
S. Z. Li ◽  
J. J. Yu ◽  
X. Pei ◽  
Hai-jun Su ◽  
J. B. Hopkins ◽  
...  
Keyword(s):  
High Precision ◽  
Screw Theory ◽  
Degree Of Freedom ◽  
Type Synthesis ◽  
General Design ◽  
Flexure Mechanism ◽  
Design Philosophy ◽  
Large Motion ◽  
Application Requirements ◽  
Made In

In recent years, the increasing of application requirements call for development of a variety of flexure mechanisms with high precision or large motion and both. Therefore, in Part III of this series of papers we demonstrate how to use the methodology addressed in Part I to synthesize concepts for two kinds of flexure mechanisms, i.e. kinematics-type flexure mechanisms (KFMs) and constraint-type flexure mechanisms (CFMs) with the specified-DOF (Degree of Freedom) characteristics. Although most of them utilize parallel configurations and flexure elements, there is a clear difference in the behavior of flexures between KFMs and CFMs, The resultant type synthesis approaches fall into two distinct categories i.e. freedom-based and constraint-based one, both of which have presented in Part I. In order to derive useful flexure mechanism concepts available for different applications, a general design philosophy and rules are summarized firstly. As the main content of this part, the classifications, numerations, and synthesis for KFMs and CFMs are made in a systematic way. As a result, a majority of new precision flexure mechanisms are developed. In addition, qualitative comparisons are provided to demonstrate the performance and application differences between kinematic-type and constraint-type flexure mechanisms with the same DOF.

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