scholarly journals Designing Light Beam Transmittance Measuring Tool Using a Laser Pointer

2016 ◽  
Vol 739 ◽  
pp. 012054
Author(s):  
H Nuroso ◽  
W Kurniawan ◽  
P Marwoto
Keyword(s):  
Light Beam ◽  
Laser Pointer ◽  
Measuring Tool ◽  
Beam Transmittance

Early Ideas

Lightspeed ◽  
2019 ◽  
pp. 4-17
Author(s):  
John C. H. Spence
Keyword(s):  
Light Beam ◽  
Laser Pointer ◽  
Speed Of Light ◽  
Least Action ◽  
Principle Of Least Action ◽  
Modern Physics ◽  
Action At A Distance ◽  
Snell’S Law ◽  
Snell's Law ◽  
The Universe

Mankind’s early ideas about the speed of light, the Aether (supposed to fill the universe) and the instantaneous “action at a distance” theory, before the speed of light was first measured. Euclid’s work on optics, in which he used his theorems from geometry to explain what is seen, assuming that rays of vision were sent out by the eye. The discovery of refraction, explained by Snell’s law and its implications for the speed of light in the theories of Descartes and Fermat, and its importance in modern physics as a principle of least action. How the study of refraction, as when a light beam from a laser pointer bends on entering water, divided scientists for centuries into two groups, those who believed that light sped up on entering water and was a particle, and those who believed it slowed down and was a wave.

Separation and analysis of forward scattered power in laboratory measurements of light beam transmittance through a turbid medium

1986 ◽  
Vol 25 (3) ◽  
pp. 420 ◽  
Author(s):  
E. Battistelli ◽  
P. Bruscaglioni ◽  
A. Ismaelli ◽  
L. Lo Porto ◽  
G. Zaccanti
Keyword(s):  
Light Beam ◽  
Turbid Medium ◽  
Laboratory Measurements ◽  
Scattered Power ◽  
Beam Transmittance

Stereoscopic Telepointing in Videocommunications

1994 ◽  
Vol 38 (3) ◽  
pp. 185-189
Author(s):  
Detlef Runde ◽  
Martin Böcker
Keyword(s):  
Light Beam ◽  
Object Oriented ◽  
The Other ◽  
Limited Time ◽  
Laser Pointer ◽  
Subjective Ratings ◽  
Input Devices ◽  
Reference Space ◽  
Slide Show ◽  
As If

Stereoscopic telepointing to be employed inter alia in cooperative telework applications yields many benefits but also poses a number of problems addressed in a study with 96 subjects under four different conditions. For two conditions, 3D-input devices were designed implementing different input metaphors. The ‘Light Beam Metaphor’ is analogous to pointing to objects with a slide show pointer or laser pointer. The ‘Reference Space Metaphor’ provides the users with the possibility of pointing to details of an object in such a way as if a re-sized model of the object was present in front of them and within reach of their hands. The other two conditions were stereoscopic and monoscopic control conditions without pointers. The subjects' task was to identify differences between a remote and a local object within a limited time. The results show that the Light Beam Metaphor pointer was easier to handle and conformed to a larger degree to the users' expectations, whereas the Reference Space Metaphor pointer received better subjective ratings on efficiency and Telepresence. The analysis of the results of all four conditions established the benefits of 3D over 2D representations for object-oriented communicative situations in terms of appeal and the impression of depth.

Individual Differences in the Flexibility of Peripersonal Space

2017 ◽  
Vol 64 (1) ◽  
pp. 49-55 ◽  
Author(s):  
Samuel B. Hunley ◽  
Arwen M. Marker ◽  
Stella F. Lourenco
Keyword(s):  
Individual Differences ◽  
Peripersonal Space ◽  
The Body ◽  
Laser Pointer ◽  
Baseline Measure ◽  
Bisection Task ◽  
Defensive Function ◽  
Representational Space ◽  
Laser Condition ◽  
Line Bisection Task

Abstract. The current study investigated individual differences in the flexibility of peripersonal space (i.e., representational space near the body), specifically in relation to trait claustrophobic fear (i.e., fear of suffocating or being physically restricted). Participants completed a line bisection task with either a laser pointer (Laser condition), allowing for a baseline measure of the size of one’s peripersonal space, or a stick (Stick condition), which produces expansion of one’s peripersonal space. Our results revealed that individuals high in claustrophobic fear had larger peripersonal spaces than those lower in claustrophobic fear, replicating previous research. We also found that, whereas individuals low in claustrophobic fear demonstrated the expected expansion of peripersonal space in the Stick condition, individuals high in claustrophobic fear showed less expansion, suggesting decreased flexibility. We discuss these findings in relation to the defensive function of peripersonal space and reduced attentional flexibility associated with trait anxieties.

DUAL LIGHT BEAM MODULATION OF PHOTOCARRIER LIFETIME IN INTRINSIC a-Si:H

1981 ◽  
Vol 42 (C4) ◽  
pp. C4-597-C4-600 ◽  
Author(s):  
P. D. Persans ◽  
H. Fritzsche
Keyword(s):  
Light Beam ◽  
Beam Modulation

Melatih Kepemimpinan Perangkat Desa Kebonharjo Kulonprogo: Membangun Sikap Anti Korupsi

2018 ◽  
Vol 1 ◽  
pp. 107
Author(s):  
Adi Heryadi ◽  
Evianawati Evianawati
Keyword(s):  
Transformational Leadership ◽  
Data Collection ◽  
Paired Samples ◽  
Significant Difference ◽  
Before And After ◽  
Post Test ◽  
Sample Test ◽  
Corruption Perception ◽  
Measuring Tool

This study aims to prove whether transformational leadership training is effective for building anti-corruption attitudes of villages in Kebonharjo village, subdistrict Samigaluh Kulonprogo. This research is an experimental research with one group pre and posttest design.Subject design is 17 people from village of 21 candidates registered. Measuring tool used in this research is the scale of anti-corruption perception made by the researcher referring to the 9 anti-corruption values with the value of reliability coefficient of 0.871. The module used as an intervention made by the researcher refers to the transformational leadership dimension (Bass, 1990). The data collected is analyzed by statistical analysis of different test Paired Sample Test. Initial data collection results obtained sign value of 0.770 which means> 0.05 or no significant difference between anti-corruption perception score between before and after training. After a period of less than 1 (one) month then conducted again the measurement of follow-up of the study subjects in the measurement again using the scale of anti-corruption perception. The results of the second data collection were analysed with Paired Samples Test and obtained the value of 0.623 sign meaning p> 0.05 or no significant difference between post test data with follow-up data so that the hypothesis of this study was rejected.

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