scholarly journals Interference-contrast optical activity: a new technique for probing the chirality of anisotropic samples and more

2020 ◽  
Vol 7 (5) ◽  
pp. 192201 ◽  
Author(s):  
R. P. Cameron ◽  
U. Vogl ◽  
N. Trautmann
Keyword(s):  
Pharmaceutical Industry ◽  
Optical Activity ◽  
Optical Rotation ◽  
New Technique ◽  
Future Research ◽  
Linear Birefringence ◽  
New Class ◽  
Potential Applications ◽  
A New Technique ◽  
Chiral Crystals

We introduce interference-contrast optical activity (ICOA) as a new technique for probing the chirality of anisotropic samples and more. ICOA could underpin a new class of ‘chiral microscopes’, with potential applications spanning the range of chirality and beyond. Two possible versions of ICOA are described explicitly; one designed to probe the optical rotation of a transparent sample regardless of the sample’s linear birefringence (ICOA-OR) and another designed to probe gradients in the optical rotation of a transparent sample (ICOA-GOR). Simulated results for α -quartz lead us to suggest that ICOA-GOR might be applied to help monitor the growth of chiral crystals in the pharmaceutical industry. Possible directions for future research are highlighted.

Pressure-Controlled Palpation: A New Technique Which Increases the Reliability of Manual Palpation

Cephalalgia ◽  
1995 ◽  
Vol 15 (3) ◽  
pp. 205-210 ◽  
Author(s):  
L Bendtsen ◽  
R Jensen ◽  
NK Jensen ◽  
J Olesen
Keyword(s):  
Pain Intensity ◽  
Myofascial Pain ◽  
Tension Type Headache ◽  
New Technique ◽  
Future Research ◽  
Manual Palpation ◽  
A New Technique ◽  
Type Headache ◽  
First Time ◽  
Pressure Controlled

The objective of the present study was to investigate whether the reliability of tenderness evaluation can be increased by using a new technique called “pressure-controlled palpation” (pcp). The technique has been made possible by a newly invented piece of equipment called a palpometer, with which a pressure-sensitive plastic film attached to the index finger records the pressure exerted. In 15 patients with chronic tension-type headache and in 15 healthy volunteers, 2 investigators studied myofascial tenderness using conventional palpation and pressure-controlled palpation. Tenderness was scored on a 4–point scale in each of the examined pericranial regions. The sum of tenderness scores recorded by two observers using conventional palpation differed significantly ( p = 0.0003), while results did not differ between observers using pressure-controlled palpation ( p = 0.89). During palpation with seven different pressure intensities a positive and linear relation between pressure and pain intensity was found ( p = 0.00006). Pain intensity reported by the subjects correlated highly with tenderness scored by the observer (rs = 0.95, p < 0.0001). These results demonstrate for the first time that tenderness scores can be compared between observers if palpation pressure is controlled. Pressure-controlled palpation represents a major improvement on current palpation techniques and should be standard in future research on myofascial pain disorders.

Noticing Aloud: Uncovering Mathematics Teacher Noticing in the Moment

2020 ◽  
Vol 8 (2) ◽  
pp. 25-36
Author(s):  
Jen Munson
Keyword(s):  
Cognitive Processes ◽  
Mathematics Teacher ◽  
New Technique ◽  
Future Research ◽  
Teacher Noticing ◽  
Student Work ◽  
Growing Body ◽  
A New Technique ◽  
The Moment

Understanding mathematics teacher noticing has been the focus of a growing body of research, in which student work and classroom videos are often used as artifacts for surfacing teachers’ cognitive processes. However, what teachers notice through reflecting on artifacts of teaching may not be parallel to what they notice in the complex and demanding environment of the classroom. This article used a new technique, side-by-side coaching, to uncover teacher noticing in the moment of instruction. There were 21 instances of noticing aloud during side by side coaching which were analyzed and classified, yielding 6 types of teacher noticing aloud, including instances in which teachers expressed confidence, struggle, and wonder. Implications for coaching and future research on teacher noticing are discussed.

scholarly journals Ordering of Transformed Recorded Electroencephalography (EEG) Signals by a Novel Precede Operator

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Amirul Aizad Ahmad Fuad ◽  
Tahir Ahmad
Keyword(s):  
Prime Numbers ◽  
New Technique ◽  
Brain Disorders ◽  
Eeg Signals ◽  
Mathematical Methods ◽  
New Approach ◽  
Brain Functions ◽  
Electrical Potentials ◽  
Potential Applications ◽  
A New Technique

Recorded electroencephalography (EEG) signals can be represented as square matrices, which have been extensively analyzed using mathematical methods to extract invaluable information concerning brain functions in terms of observed electrical potentials; such information is critical for diagnosing brain disorders. Several studies have revealed that certain such square matrices—in particular, those related to so-called “elementary EEG signals”—exhibit properties similar to those of prime numbers in which every square EEG matrix can be regarded as a composite of these signals. A new approach to ordering square matrices is pivotal to extending the idea of square matrices as composite numbers. In this paper, several ordering concepts are investigated and a new technique for ordering matrices is introduced. Finally, some properties of this matrix order are presented, and the potential applications of this technique to analyzing EEG signals are discussed.

A new technique for the mapping of oxygen tension on the brain surface

2005 ◽  
Vol 25 (1_suppl) ◽  
pp. S543-S543
Author(s):  
Satoshi Kimura ◽  
Keigo Matsumoto ◽  
Yoshio Imahori ◽  
Katsuyoshi Mineura ◽  
Toshiyuki Itoh
Keyword(s):  
Oxygen Tension ◽  
New Technique ◽  
Brain Surface ◽  
A New Technique ◽  
The Brain
Sign in / Sign up

Export Citation Format

Share Document