The structure of the shower front of large extensive air showers

1968 ◽  
Vol 46 (10) ◽  
pp. S9-S12 ◽  
Author(s):  
A. J. Baxter ◽  
A. A. Watson ◽  
J. G. Wilson
Keyword(s):  
Experimental Study ◽  
Measurement Errors ◽  
Time Distribution ◽  
Finite Size ◽  
Extensive Air Showers ◽  
Time Of Arrival ◽  
Air Showers ◽  
The Mean ◽  
Mean Time ◽  
Theory And Experiment

Using a method described previously (Baxter et al. 1966), an experimental study has been made of the time distribution of energy from the shower front of large extensive air showers detected by the Haverah Park 500-m array. Data are given on the mean time of arrival of energy in showers at axial distances over the range 250–950 m for all zenith angles, while average time distributions of the energy in the shower front are presented for some typical distance and zenith angle intervals. Experimental observations are compared with a theoretical prediction; a real discrepancy appears to exist between theory and experiment since about 25% more energy is observed in the 25 ns after the first detectable signal than is predicted. The result suggests a higher or more concentrated origin for muons than normally assumed.Assessment of measurement errors, particularly those arising from the sampling of a diffuse shower front by detectors of finite size, suggests that no intrinsic differences in the properties of the majority of air showers have yet been detected by this method.

Abstract 29: A Neighborhood Local Volunteer Response Network Improves Response Time for Cardiac Arrest

Circulation ◽  
2018 ◽  
Vol 138 (Suppl_2) ◽  
Author(s):  
Karl B Kern ◽  
Carter Newton ◽  
Charles " Wunder ◽  
Thomas P Colberg ◽  
Marvin J Slepian
Keyword(s):  
Cardiac Arrest ◽  
Response Times ◽  
Retirement Community ◽  
Time Of Arrival ◽  
Time Saving ◽  
Response Network ◽  
Community Boundaries ◽  
The Mean ◽  
Mean Time ◽  
Hospital Cardiac Arrest

Background: Minutes are crucial in the treatment of out-of-hospital cardiac arrest (CA). Immediate chest compressions and early defibrillation are keys to good outcomes. Local neighborhood volunteer (vol) response programs may decrease delays to early CPR and AED use. We hypothesized that a coordinated effort of alerting trained neighborhood vols simultaneously with 911 activation of professional EMS providers would provide earlier CPR and defibrillation in such communities. Methods: We developed a program of simultaneously alerting CPR and AED trained neighborhood vols and the local EMS system for cardiac arrest events in a retirement community in Southern Arizona, encompassing approximately 17,300 homes and 21,500 residents. EMS services are provided by 5 stations within the community boundaries. Within a single housing development neighborhood, 9 vols and the closest EMS station were involved in 3 days of mock CA notifications (total of 12 different alerts at various times during daytime hours were sent). This provided a total of 120 response opportunities, 12 for EMS and 108 for vols. The distance to the mock event and the time from alert to arrival were recorded and compared. Results: In the selected 55+ neighborhood, the two groups differed significantly in both distance to the mock cardiac arrest event and in response times. The volunteers average 0.33±0.19 miles from the mock CA incidences while the closest EMS station was 3.3 miles from the tested neighborhood (p<0.0001). Response times (time from call to arrival) were also different. The earliest Vol arrived at 1min 30sec±48sec*, 2 Vols & AED at 1min 38 sec±53sec*, all arriving Vols at 3min 23 sec*, and EMS at 7min 20 sec±1min 13sec (*p<0.0001 vs EMS). Conclusion: When the neighborhood volunteers in this testing period were geographically closer to the mock CA event, they arrived significantly sooner to the scene than did the EMS service. The mean time of arrival for at least 2 vols with an AED was 5 min 42 sec faster than the professional rescuers. The implications for such a time saving could be as much as a 240% increase (25% to 85%) in survival for those with shockable rhythms.

scholarly journals Experimental Evaluation of Squeeze Film Supported Flexible Rotors

1982 ◽  
Author(s):  
M. D. Rabinowitz ◽  
E. J. Hahn
Keyword(s):  
Theoretical Model ◽  
Experimental Evaluation ◽  
Measurement Errors ◽  
Vibration Amplitude ◽  
Squeeze Film ◽  
Experimental Investigations ◽  
Flexible Rotors ◽  
The Mean ◽  
Lubricant Viscosity ◽  
Theory And Experiment

This paper describes the experimental investigations which were conducted to verify existing theoretical vibration amplitude predictions for centrally preloaded, squeeze film supported flexible rotors. The influence of measurement errors and operating condition uncertainties are quantified. The agreement between theory and experiment was excellent, and it is shown that any discrepancy can be explained in terms of errors in determining the mean lubricant viscosity and the orbit magnitudes. Hence, for the range of parameters investigated, the theoretical model and predictions therefrom are validated.

scholarly journals Mechanical comparative analysis of three different types of sutures in different dimensions tendons - experimental study

2002 ◽  
Vol 10 (3) ◽  
pp. 42-51
Author(s):  
Raimundo Nonato R. Medeiros ◽  
José Wilson Rodriguez ◽  
Roberto Basile Jr. ◽  
Clelgen Luis Bonetti ◽  
Carlos Alberto dos Santos ◽  
...  
Keyword(s):  
Experimental Study ◽  
Comparative Analysis ◽  
Iliac Bone Graft ◽  
Congenital Kyphosis ◽  
Different Types ◽  
Spinal Arthrodesis ◽  
Different Dimensions ◽  
The Mean ◽  
Mean Time

The authors present sixteen patients with congenital kyphosis treated by posterior spinal arthrodesis. A homologous or autogenous iliac bone graft was used. The patients walked with Risser-Cotrel body cast in the 6 months of postoperatory period. The mean time of follow-up was 58,25 months and the mean age of the patients at time of surgery was 9,3 years. The mean angular value of the congenital kyphosis before surgery was 50,44º Cobb and after ther surgery it was 46,94º Cobb. One of the patients who had curve of 69º Cobb, presented pseudoarthrosis. The final results were good in 10, regular in 4 and bad in 2 patients. The need of the diagnostic and precocious treatment is recommended by authors.

scholarly journals EFFECT OF HUSBAND'S SUPPORT IN THE IMPLEMENTATION OF OXYTOCIN MASSAGE BY MIDWIFE ON THE PRODUCTION AND TIME OF COLOSTRUM SECRETION AMONG POST C-SECTION DELIVERY WOMEN

2021 ◽  
Vol 1 (1) ◽  
pp. 31-36
Author(s):  
Novia Sari ◽  
Lucky Herawati ◽  
Agus K. Rubaya
Keyword(s):  
Experimental Study ◽  
P Value ◽  
Significance Level ◽  
Group Design ◽  
Post Test ◽  
Massage Group ◽  
Quasi Experimental ◽  
The Mean ◽  
Mean Time ◽  
Better Than

Objective: To determine the effect of husband's support in the implementation of oxytocin massage by midwife on the production and time of colostrum secretion among post C-Section delivery women.Methods: A quasi-experimental study with a post-test only group design at hospital in DIY in April-June 2020. The samples consisted of 32 respondents, 16 post C-Section delivery women with oxytocin massage who received husband's support and 16 respondents with oxytocin massage without husband’s support. The preparation of husband’s support was conducted through training by midwife to the husbands using a booklet for 80 minutes. Data analysis in this study used univariate, Independent t-test, and MANOVA with a significance level of 95%.Results: Evaluation showed that 68.75% of post C-Section delivery women received good husband’s support. The mean colostrum production in the oxytocin massage group by midwife with husband's support was 3.61 cc and the mean time of colostrum secretion was 4.13 hours better than oxytocin massage without husband's support.Conclusion: Husband's support in the implementation of oxytocin massage by midwife had an effect on the production and time of colostrum secretion among post C-Section delivery women with p-value <0.0001.

Depilatory Agents intoxication and factors contributing to its mortality: A 9-year review

2011 ◽  
Vol 30 (10) ◽  
pp. 1454-1457
Author(s):  
Esmaeil Farzaneh ◽  
Babak Mostafazadeh ◽  
Nasim Zamani ◽  
Armen Eskandari ◽  
Mohammadali Emamhadi
Keyword(s):  
Retrospective Study ◽  
Mortality Rate ◽  
Medical Records ◽  
Time Of Arrival ◽  
Emergency Ward ◽  
Western Countries ◽  
The Mean ◽  
Mean Time

Poisoning with depilatory agents is a rather uncommon entity in western countries. In this study, we describe poisoning with a corrosive arsenic-based depilatory agent (CABD) and factors related to its mortality in a poisoning center in Tehran. In a retrospective study, the medical records of all patients with CABD intoxication who attended the emergency ward of Loghman-Hakim hospital, the only poisoning center in Tehran, over a 9-year period between 2000 and 2009 were reviewed. The majority of patients were men (78.7%, n = 122 vs. women: 21.3%, n = 33). The mean age was 35.55 ± 16.68 years. Mean time of arrival to hospital was 3.63 hours (SD = 4.07). The mortality rate was 5.8% and increased significantly with higher amounts of ingestion and delay in arrival to hospital. CABD poisoning may be lethal if not treated promptly and correctly. Restriction or, if not practical, reduction of harmful components of this substance should be considered.

The arrival time distribution of muons in extensive air showers

1986 ◽  
Vol 12 (6) ◽  
pp. 547-560 ◽  
Author(s):  
E J de Villiers ◽  
D J van der Walt ◽  
P K F Grieder ◽  
G van Urk
Keyword(s):  
Time Distribution ◽  
Arrival Time ◽  
Extensive Air Showers ◽  
Arrival Time Distribution ◽  
Air Showers
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