Albedo and constant source problems for extremely anisotropic scattering

Kerntechnik ◽  
2013 ◽  
Vol 78 (3) ◽  
pp. 245-249
Author(s):  
M. A. Koçmen ◽  
A. Teğmen ◽  
D. Türeci ◽  
M. Ç. Güleçyüz ◽  
R. G. Türeci
Keyword(s):  
Anisotropic Scattering ◽  
Constant Source

Scattering Rings in Birefringent Porous Silicon

2003 ◽  
Vol 762 ◽  
Author(s):  
Claudio J. Oton ◽  
Zeno Gaburro ◽  
Mher Ghulinyan ◽  
Nicola Daldosso ◽  
Lucio Pancheri ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Light Scattering ◽  
Porous Silicon ◽  
Direct Measurement ◽  
Optical Anisotropy ◽  
Oblique Incidence ◽  
Laser Light ◽  
Anisotropic Scattering ◽  
Scattering Measurements

AbstractWe report the observation of strongly anisotropic scattering of laser light at oblique incidence on (100)-oriented porous silicon layers. We performed angle-resolved light scattering measurements and three concentric rings were observed. Modeling porous silicon by means of nanometric columnar air pores and an effective anisotropic uniaxial dielectric constant explains the observed phenomenon, and besides, the observation of the angle aperture of these rings allows a direct measurement of relative birefringence. We finally study the changes of optical anisotropy after different modifications of the structure.

Religious Uses of Licit and Illicit Psychoactive Substances in a Branch of the Santo Daime Religion

2008 ◽  
Vol 2 (3) ◽  
pp. 393-414 ◽  
Author(s):  
Edward MacRae
Keyword(s):  
Substance Use ◽  
Psychoactive Substance ◽  
Psychoactive Substances ◽  
Religious Groups ◽  
Santo Daime ◽  
Brazilian Society ◽  
Psychoactive Substance Use ◽  
Constant Source

The article deals with the different effects of tolerant and prohibitionist policies associated with psychoactive substance use in Brazil. Whereas the licit use of ayahuasca has been successfully incorporated into mainstream Brazilian society, the ritual use of cannabis by one of the Santo Daime religious groups has never been fully accepted and remains a constant source of problems for the ayahuasca churches, their followers and society at large.

Reality brings excitement to engineering education

1998 ◽  
Vol 12 (1) ◽  
pp. 83-86
Author(s):  
LARRY LEIFER ◽  
SHERI SHEPPARD
Keyword(s):  
Engineering Education ◽  
Social Activity ◽  
Thinking Skills ◽  
Engineering Practice ◽  
Engineering Science ◽  
Science And Engineering ◽  
Engineering Product ◽  
Intellectual Content ◽  
Versus Communication ◽  
Constant Source

The intellectual content and social activity of engineering product development are a constant source of surprise, excitement, and challenge for engineers. When our students experience product-based-learning (PBL), they experience this excitement (Brereton et al., 1995). They also have fun and perform beyond the limits required for simple grades. We, their teachers, experience these things too. Why, then, are so few students and faculty getting the PBL message? How, then, can we put the excitement back in engineering education? In part, we think this is because of three persistent mistakes in engineering education:1. We focus on individual students.2. We focus on engineering analysis versus communication between engineers.3. We fail to integrate thinking skills in engineering science and engineering practice.

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