Observation of terahertz electric pulses generated by nearly filled-gap nonuniform illumination excitation

2000 ◽  
Vol 77 (24) ◽  
pp. 3896-3898 ◽  
Author(s):  
Shi-Hsiang Lu ◽  
Jun-Liang Li ◽  
Jian-Shen Yu ◽  
Sheng-Fu Horng ◽  
C. C. Chi
Keyword(s):  
Electric Pulses ◽  
Nonuniform Illumination

Intense electric pulses with 187-fs FWHM generated by near-filled-gap nonuniform illumination excitation

1999 ◽  
Author(s):  
Sheng-fu Horng ◽  
Shi-Hsiang Lu ◽  
Jun-Liang Li ◽  
Jian-Shen Yu ◽  
Tsong-Ru Tsai ◽  
...  
Keyword(s):  
Electric Pulses ◽  
Nonuniform Illumination

scholarly journals Using electrodermal activity to validate multilevel pain stimulation in healthy volunteers evoked by thermal grills

2020 ◽  
Vol 319 (3) ◽  
pp. R366-R375
Author(s):  
Hugo F. Posada-Quintero ◽  
Youngsun Kong ◽  
Kimberly Nguyen ◽  
Cara Tran ◽  
Luke Beardslee ◽  
...  
Keyword(s):  
Tissue Injury ◽  
Electrodermal Activity ◽  
Pain Scale ◽  
Potential Harm ◽  
Electric Pulses ◽  
Stimulation Level ◽  
Highly Correlated ◽  
The Brain ◽  
Different Levels ◽  
Assessment Research

We have tested the feasibility of thermal grills, a harmless method to induce pain. The thermal grills consist of interlaced tubes that are set at cool or warm temperatures, creating a painful “illusion” (no tissue injury is caused) in the brain when the cool and warm stimuli are presented collectively. Advancement in objective pain assessment research is limited because the gold standard, the self-reporting pain scale, is highly subjective and only works for alert and cooperative patients. However, the main difficulty for pain studies is the potential harm caused to participants. We have recruited 23 subjects in whom we induced electric pulses and thermal grill (TG) stimulation. The TG effectively induced three different levels of pain, as evidenced by the visual analog scale (VAS) provided by the subjects after each stimulus. Furthermore, objective physiological measurements based on electrodermal activity showed a significant increase in levels as stimulation level increased. We found that VAS was highly correlated with the TG stimulation level. The TG stimulation safely elicited pain levels up to 9 out of 10. The TG stimulation allows for extending studies of pain to ranges of pain in which other stimuli are harmful.

Calcium bursts induced by nanosecond electric pulses

2003 ◽  
Vol 310 (2) ◽  
pp. 286-295 ◽  
Author(s):  
P.Thomas Vernier ◽  
Yinghua Sun ◽  
Laura Marcu ◽  
Sarah Salemi ◽  
Cheryl M Craft ◽  
...  
Keyword(s):  
Electric Pulses ◽  
Nanosecond Electric Pulses

Electrochemotherapy with cisplatin: potentiation of local cisplatin antitumour effectiveness by application of electric pulses in cancer patients

1998 ◽  
Vol 34 (8) ◽  
pp. 1213-1218 ◽  
Author(s):  
G Serša ◽  
B Štabuc ◽  
M Čemažar ◽  
B Jančar ◽  
D Miklavčič ◽  
...  
Keyword(s):  
Cancer Patients ◽  
Electric Pulses

Design of diffractive beam-shaping elements for nonuniform illumination waves

1998 ◽  
Author(s):  
Andreas Hermerschmidt ◽  
Hans J. Eichler ◽  
Stephan Teiwes ◽  
Joerg Schwartz
Keyword(s):  
Beam Shaping ◽  
Nonuniform Illumination

scholarly journals Selective cytotoxicity of intense nanosecond-duration electric pulses in mammalian cells

2010 ◽  
Vol 1800 (11) ◽  
pp. 1210-1219 ◽  
Author(s):  
Bennett L. Ibey ◽  
Andrei G. Pakhomov ◽  
Betsy W. Gregory ◽  
Vera A. Khorokhorina ◽  
Caleb C. Roth ◽  
...  
Keyword(s):  
Mammalian Cells ◽  
Nanosecond Duration ◽  
Selective Cytotoxicity ◽  
Electric Pulses

scholarly journals Rapid changes in flagellar rotation induced by external electric pulses

1991 ◽  
Vol 60 (6) ◽  
pp. 1350-1355 ◽  
Author(s):  
N. Kami-ike ◽  
S. Kudo ◽  
H. Hotani
Keyword(s):  
Electric Pulses ◽  
Rapid Changes ◽  
Flagellar Rotation

Categorisation of Interpulse Intervals and Stochastic Analysis of Discharge Patterns in Resting Weak-Electric Mormyrid Fish (Gnathonemus Petersii)

Behaviour ◽  
1987 ◽  
Vol 102 (3-4) ◽  
pp. 264-282 ◽  
Author(s):  
Claudine TEYSSÈDRE ◽  
Michel Boudinot ◽  
Catherine Minisclou
Keyword(s):  
Individual Differences ◽  
Stochastic Analysis ◽  
Electric Organ Discharge ◽  
Electric Organ ◽  
Electric Pulses ◽  
Oscillating Systems ◽  
Mormyrid Fish ◽  
Discharge Patterns ◽  
Gnathonemus Petersii ◽  
Criterion Method

AbstractInter-individual similarities in the electric organ discharge activity of immobile, isolated and undisturbed mormyrid fish were investigated. Two types of analysis were performed on the discharge patterns of 10 Gnathonemus petersii: (1) The Bout Interval Criterion method was used to categorise the intervals between consecutive electric pulses; (2) an analysis of sequences of acts was performed to study the serial ordering of the interpulse intervals. Interpulse intervals were demonstrated to belong to distinct classes, having similar limits for most animals. Most fish show five classes of interpulse intervals (23 to 68 ms; 69 to 108 ms; 109 to 170 ms; 171 to 212 ms; >212 ms), to which a sixth class (<23 ms) is added in some cases. Each class contains a similar number of intervals in all individuals. Particular associations were found between the occurrences of interpulse intervals belonging to different classes. Some of these associations (for example BB and EC) are displayed by most fish, whereas others express individual differences in the patterns of discharge. The discharge of immobile, undisturbed, isolated mormyrid fish is thus shown to present many similarities among individuals. Inter-individual differences exist only in the serial ordering of the intervals, where they arc best regarded as variations around a same theme. The absence of overlapping between the two main categories of interpulse intervals (category I: 69 to 108 ms; category II: 171 to 212 ms), as well as the constancy of their baselines, suggest that two oscillating systems participate to the electromotor command. The stochastic analysis of the serial ordering of the interpulse intervals suggest in addition that these two oscillators do not function independently. Momentaneous modifications of the activity of these two oscillators would provide an economical explanation for the various changes in the types of interpulse intervals associated with behavioural state or social interactions.

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