Episode 8 – Trap Door (Week 7)

2021 ◽  
pp. 367-368
Author(s):  
Lee Sheldon
Keyword(s):  
Trap Door

Numerical analysis of trajectories in a Cassinian ion trap of second order with trap door ion inlet

2021 ◽  
Vol 27 (1) ◽  
pp. 3-12
Author(s):  
Bjoern Raupers ◽  
Hana Medhat ◽  
Juergen Grotemeyer ◽  
Frank Gunzer
Keyword(s):  
Ion Trap ◽  
Ion Traps ◽  
Second Order ◽  
Resolving Power ◽  
Periodic Pattern ◽  
Ion Motion ◽  
Trap Door ◽  
Mass Resolving Power ◽  
Long Time ◽  
The Fourier Transform

Ion traps like the Orbitrap are well known mass analyzers with very high resolving power. This resolving power is achieved with help of ions orbiting around an inner electrode for long time, in general up to a few seconds, since the mass signal is obtained by calculating the Fourier Transform of the induced signal caused by the ion motion. A similar principle is applied in the Cassinian Ion Trap of second order, where the ions move in a periodic pattern in-between two inner electrodes. The Cassinian ion trap has the potential to offer mass resolving power comparable to the Orbitrap with advantages regarding the experimental implementation. In this paper we have investigated the details of the ion motion analyzing experimental data and the results of different numerical methods, with focus on increasing the resolving power by increasing the oscillation frequency for ions in a high field ion trap. In this context the influence of the trap door, a tunnel through which the ions are injected into the trap, on the ion velocity becomes especially important.

Chemical characterization of acylpolyamine toxins from venom of a trap-door spider and two tarantulas

Toxicon ◽  
1990 ◽  
Vol 28 (5) ◽  
pp. 541-546 ◽  
Author(s):  
Wayne S. Skinner ◽  
Paula A. Dennis ◽  
Alfred Lui ◽  
Robert L. Carney ◽  
Gary B. Quistad
Keyword(s):  
Chemical Characterization ◽  
Trap Door

„Trap-Door”-Frakturen des Orbitabodens

1999 ◽  
Vol 171 (Bd.2/3) ◽  
pp. 258-267
Author(s):  
J. Hoffmann ◽  
Chr. Pfannenberg ◽  
F. Dammann ◽  
A. M. Grün ◽  
M. Krimmel
Keyword(s):  
Trap Door

scholarly journals Reliability and effective use of electronic trap monitoring systems based on cellular networks

2021 ◽  
Author(s):  
Anthony R. Martin
Keyword(s):  
Cellular Networks ◽  
Electronic Monitoring ◽  
Monitoring Systems ◽  
Trap Door ◽  
Invasive Species Control ◽  
Large Numbers ◽  
Mobile Phone Networks ◽  
Effective Use ◽  
Cellular Mobile ◽  
Monitoring Devices

AbstractThe deployment of cage traps rather than kill traps can greatly reduce non-target mortality in an invasive species control/eradication operation, but their use is normally constrained by the need for them to be checked frequently on animal welfare grounds. This paper examines the reliability of electronic monitoring devices that use cellular (mobile phone) networks to alert the operator when a trap door closes, and also discusses the management network that is needed to convert an alarm into a timely trap visit without fail. The two monitoring systems tested were 100% reliable in notifying the operator when a trap door closed, and their use reduced the burden of trap visits by 98% compared to the standard protocol of daily checks. As such, these systems can be of great value to campaigns operating large numbers of traps, especially when capture rates are low.

Trap-door medicine

The Lancet ◽  
2000 ◽  
Vol 355 (9201) ◽  
pp. 414
Author(s):  
Michael Katzenstein
Keyword(s):  
Trap Door

Autistic Disruptions, Trans Temporalities

2021 ◽  
Vol 120 (2) ◽  
pp. 343-361
Author(s):  
Jake Pyne
Keyword(s):  
Life Writing ◽  
Gender Nonconformity ◽  
Trap Door ◽  
And Gender

The desire for transgender futures has grown exponentially in recent years, but many of these futures are traps, concealing a demand to assume normative and neoliberal priorities in exchange for citizenship and belonging. This article argues that some of these traps might be undone through autistic disruption. Dwelling with the life writing and memoir of individuals both autistic and trans, it suggests that, by choice or by circumstance, autistic-trans narratives defy the chrononormative mandate of the able-minded future. By claiming autism and gender nonconformity as mutually inclusive, foregrounding alternative sensorealities, and interrupting the incitement to get better, this article argues that cripping trans time through autistic disruption offers what Gossett, Stanley, and Burton call a “trap door”: a route of escape from the normate trans future and a way for autistic life to insist on its own continuation and survivance.

The Time of the Trap Door

Killing Times ◽  
2019 ◽  
pp. 54-86
Author(s):  
David Wills
Keyword(s):  
Eighteenth Century ◽  
Seventeenth Century ◽  
Supreme Court ◽  
French Revolution ◽  
Death Penalty ◽  
Islamic State ◽  
Trap Door ◽  
Late Eighteenth Century ◽  
Time Period ◽  
Late Eighteenth

This chapter offers an examination of the refining of the instant of execution that takes place with the introduction of trap door gallows in the seventeenth century and, more spectacularly and explicitly, in the late eighteenth century with the French Revolution and the guillotine. The death penalty is thereby distinguished from torture and a post-Enlightenment conception of punishment is introduced, lasting to the present. But the guillotine is bloody, and that underscores a complex visuality of the death penalty that also obtains during the same time period, playing out across diverse genres such as the execution sermon, political and scientific discourses relating to the guillotine, Supreme Court descriptions of crimes, and practices of an entity such as the Islamic State. What develops concurrent with the guillotine—yet remains constant through all those examples--is a form of realist photographic visuality.

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