scholarly journals Analysis of the influence of sparkout time on grinding using several lubrication/cooling methods

Author(s):  
José Augusto C. Alves ◽  
Ulysses de B. Fernandes ◽  
Anselmo Eduardo Diniz ◽  
Eduardo Carlos Bianchi ◽  
Paulo Roberto de Aguiar ◽  
...  
Keyword(s):  
Author(s):  
Rebecca Hirschhorn ◽  
Oluwagbemiga DadeMatthews ◽  
JoEllen Sefton

This study evaluated emergency medical services (EMS) providers’ knowledge of exertional heat stroke (EHS) and assessed current EMS capabilities for recognizing and managing EHS. EMS providers currently practicing in the United States were recruited to complete a 25-item questionnaire. There were 216 questionnaire responses (183 complete) representing 28 states. On average, respondents were 42.0 ± 13.0 years old, male (n = 163, 75.5%), and white (n = 176, 81.5%). Most respondents were Paramedics (n = 110, 50.9%) and had ≥16 years of experience (n = 109/214, 50.9%) working in EMS. Fifty-five percent (n = 99/180) of respondents had previously treated a patient with EHS. The average number of correct answers on the knowledge assessment was 2.6 ± 1.2 out of 7 (~37% correct). Temporal (n = 79), tympanic (n = 76), and oral (n = 68) thermometers were the most prevalent methods of temperature assessment available. Chemical cold packs (n = 164) and air conditioning (n = 134) were the most prevalent cooling methods available. Respondents demonstrated poor knowledge regarding EHS despite years of experience, and over half stating they had previously treated EHS in the field. Few EMS providers reported having access to an appropriate method of assessing or cooling a patient with EHS. Updated, evidence-based training needs to be provided and stakeholders should ensure their EMS providers have access to appropriate equipment.


2009 ◽  
Vol 416 ◽  
pp. 514-518 ◽  
Author(s):  
Qing Long An ◽  
Yu Can Fu ◽  
Jiu Hua Xu

Grinding, characterized by its high specific energy consumption, may generate high grinding zone temperature. These can cause thermal damage to the ground surface and poor surface integrity, especially in the grinding of difficult-to-machine materials. In this paper, experimental and fem study on grinding temperature during surface grinding of Ti-6Al-4V with different cooling methods. A comparison between the experimental and numerical results is made. It is indicated that the difference between experimental and numerical results is below 15% and the numerical results can be considered reliable. Grinding temperature can be more effectively reduced with CPMJ than that with cold air jet and flood cooling method.


2017 ◽  
Vol 112 ◽  
pp. 35-41 ◽  
Author(s):  
Ashok Buchiboyina ◽  
Eric Ma ◽  
Andrew Yip ◽  
Deepika Wagh ◽  
Jason Tan ◽  
...  

2013 ◽  
pp. 47-69
Author(s):  
Jun Dai ◽  
Michael M. Ohadi ◽  
Diganta Das ◽  
Michael G. Pecht
Keyword(s):  

Author(s):  
Sanjay ◽  
Onkar Singh ◽  
B. N. Prasad

This paper deals with comparative study of the influence of different methods of steam cooling on the performance of simple combined gas/steam cycle plants. The topping cycle chosen is simple gas turbine while the bottoming cycle is a triple-pressure reheat steam cycle. Steam has been chosen as the cooling medium to be studied, as it is the most promising medium. All possible open and closed loop cooling with steam as the cooling medium have been considered. The prediction is based on the modeling of various elements of simple combined gas/steam cycle considering the real situation. The study shows that closed loop steam cooling is superior as compared to other steam cooling methods. However even though other two methods are slightly inferior technologically, but they do not suffer from the chances of problems of cogging of coolant holes if the steam is not ultra pure.


Sign in / Sign up

Export Citation Format

Share Document