Spark Gap Breakdown at EMP Threat Level Rates of Voltage Rise

1979 ◽  
Vol 26 (6) ◽  
pp. 4959-4963
Author(s):  
P. R. Trybus ◽  
A. M. Chodorow ◽  
D. L. Endsley ◽  
J. E. Bridge
Keyword(s):  
Voltage Rise ◽  
Spark Gap ◽  
Threat Level

An efficient and simple spark-gap design for gas lasers

1994 ◽  
Vol 4 (12) ◽  
pp. 2609-2616 ◽  
Author(s):  
M. Diniz Santa Marinha ◽  
L. Marinho Soares ◽  
A. Dias Tavares ◽  
C. E. Fellows ◽  
C. A. Massone
Keyword(s):  
Gas Lasers ◽  
Spark Gap

Power through Intersubjectivity: Representing the Resilient Child in Urban Survival Narratives

2009 ◽  
Vol 2 (1) ◽  
pp. 65-80
Author(s):  
Yvonne Hammer
Keyword(s):  
Social Discourse ◽  
Individual Agency ◽  
Liminal Spaces ◽  
Young Readers ◽  
Problematic Relationship ◽  
Narrative Representations ◽  
Spark Gap ◽  
Urban Survival ◽  
Resilient Child

The problematic relationship between urban dislocation, the proscribed spaces of urban childhood, child marginnalisation and the societal invisibility of under-age citizens is widely thematised in contemporary children's literature. This article examines how childhood agency, as a form of power, becomes aligned with resilience through intersubjectivity in the narrative representations of marginalised child subjects in Virginia Hamilton's The Planet of Junior Brown (1987) and Julie Bertagna's The Spark Gap ( 1996 ). Depictions of child homelessness, which construct resilience in the determination to survive experiences of marginalisation, dislocation and loss, offer an opportunity to examine representations of child subjectivity. This discussion centres on the role of intersubjectivity as an alternative construction to some humanistic frames that privilege the notion of an individual agency divested of childhood's limitations. It identifies the experiential codes which more accurately reflect the choices available to young readers, where liminal spaces of homelessness that first establish social and cultural dependencies are re-interpreted through depictions of relational connection among displaced child subjects. The discussion suggests that these multifocal novels construct dialogic representations of social discourse that affirm intersubjectivity as a form of agency.

Subjective Fear Dilutes as Group Size Increases

2020 ◽  
Author(s):  
dean mobbs ◽  
Ellen Tedeschi ◽  
Anastasia Buyalskaya ◽  
Brian Silston
Keyword(s):  
Group Size ◽  
Real World ◽  
Survival Benefit ◽  
Group Living ◽  
External Factors ◽  
Threat Perception ◽  
Perception Of Threat ◽  
Threat Level ◽  
Internal States ◽  
Risk Dilution

According to Hamilton’s Selfish Herd Theory, a crucial survival benefit of group living is that it provides a ‘risk dilution’ function against predation. Despite a large literature on group living benefits in animals, few studies have been conducted on how group size alters subjective fear or threat perception in humans, and on what factors drive preferences for being in groups when facing threats. We conducted seven experiments (N=3,838) to test (A) if the presence of others decreases perception of threat under a variety of conditions. In studies 1 to 3, we experimentally manipulated group size in hypothetical and real-world situations, to show that fear responses decreased as group size increased. In studies 4 to 7 we again used a combination of hypothetical, virtual and real-world decisions to test (B) how internal states (e.g. anxiety) and external factors (e.g. threat level, availability of help) affected participants’ preference for groups. Participants consistently chose larger groups when threat and anxiety were high. Overall, our findings show that group size provides a salient signal of protection and safety.

Spark Gap Electrode Erosion

1984 ◽  
Author(s):  
H. Krompholz ◽  
M. Kristiansen
Keyword(s):  
Electrode Erosion ◽  
Spark Gap

scholarly journals Voltage rise anemometry in turbulent flows applied to internal combustion engines

2021 ◽  
Vol 62 (6) ◽  
Author(s):  
Michael Wörner ◽  
Gregor Rottenkolber
Keyword(s):  
Turbulent Flows ◽  
Internal Combustion Engines ◽  
Clear Correlation ◽  
Combustion Engines ◽  
Mean Flow ◽  
Voltage Rise ◽  
Mathematical Correlation ◽  
Thermodynamic Conditions ◽  
Secondary Voltage ◽  
Cylinder Flow

AbstractIn an experimental procedure, a voltage rise anemometry is developed as a measurement technique for turbulent flows. Initially, fundamental investigations on a specific wind tunnel were performed for basic understanding and calibration purpose. Thus, a mathematical correlation is derived for calculating flow from measured secondary voltage of an ignition system under different thermodynamic conditions. Subsequently, the derived method was applied on a spark-ignited engine to measure in-cylinder flow. Therefore, no changes on combustion chamber were necessary avoiding any interferences of the examined flow field. Comparing four different engine configurations, a study of mean flow and turbulence was performed. Moreover, the results show a clear correlation between measured turbulence and analysed combustion parameters. Graphic abstract

Design and test of high-voltage, high-repetition rotary trigger double spark gap switch

2021 ◽  
Vol 92 (1) ◽  
pp. 014702
Author(s):  
Chuhyun Cho ◽  
Seong-Tae Han ◽  
Yun-Sik Jin
Keyword(s):  
High Voltage ◽  
High Repetition ◽  
Spark Gap ◽  
Spark Gap Switch

scholarly journals 304. Predictors of mortality in carbapenem-resistant Enterobacteriales bacteremia

2020 ◽  
Vol 7 (Supplement_1) ◽  
pp. S150-S150
Author(s):  
Michael R Hovan ◽  
Vanessa Cedarbaum ◽  
Thomas Kirn ◽  
Thomas Kirn
Keyword(s):  
Mortality Rate ◽  
Healthcare Facility ◽  
Antibiotic Use ◽  
The United States ◽  
Empiric Therapy ◽  
Carbapenem Resistant ◽  
Increased Risk ◽  
Threat Level ◽  
Infection Source ◽  
Microbiological Data

Abstract Background Carbapenem-Resistant Enterobacteriales (CRE) bacteremia is associated with significant morbidity and mortality. CRE were assigned a threat level of “urgent” in the 2019 CDC report on antibiotic resistance in the United States. We attempted to identify predictors of 30-day mortality in patients with CRE bacteremia. Methods We performed a chart review of 146 patients with CRE bacteremia from January 2010 - July 2019. CRE was defined using the current CDC definition. Electronic medical records were reviewed to obtain clinical characteristics and outcomes including prior antibiotic use, comorbidities, prior location, treatment, hospital course, microbiological data and outcomes including in-hospital mortality. Results Of 146 patients included for analysis, the overall 30-day mortality rate was 36.3%. Patients admitted from a healthcare facility including outside hospitals, rehab, nursing homes, and LTACs had a 49.1% (29/59) 30-day mortality rate compared to 27.5% (24/87) for those admitted from home (RR=1.78, 95% CI 1.16–2.73, p=.0082). Patients with a Pitt bacteremia score ≥ 4 had a greater 30-day mortality rate (42.6%, 26/61) compared to those with a Pitt bacteremia score < 4 (17.6%, 15/85) (RR=2.92, 95% CI 1.40–4.16, p=.0015). Patients that received inactive empiric therapy had a 30-day mortality rate of 36% (36/100) compared to 36.9% (17/46) in those that received active empiric therapy (RR=.9741, 95% CI .6155-1.59, p=.9109). Patients with isolates determined to have a meropenem MIC ≥ 4 had a 30-day mortality rate of 40.2% (37/92) while those with an MIC < 4 had a 30-day mortality rate of 30.2% (16/53) (RR=1.33, 95% CI .8250–2.1513, p=.2408). A pulmonary source of bacteremia was associated with an increased risk of 30-day mortality (64.3%, 9/14) compared to all other sources of bacteremia (34.8%, 31/89) (RR=1.85, 95% CI 1.39–2.99, p=.0129). No other infection source was associated with an increased 30-day mortality rate. Conclusion Admission from a healthcare facility, Pitt bacteremia score ≥ 4, and pulmonary source of bacteremia were associated with increased risk of 30-day mortality. Interestingly, administration of active empiric therapy was not associated with a decreased mortality risk. Meropenem MIC was not predictive of 30-day mortality. Disclosures All Authors: No reported disclosures

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