DETERMINATION OF THE MINIMAL REFLECTING SURFACE POINTS NUMBER REQUIRED FOR ASSESSMENT OF LARGE-SIZE TRAN SFORMABLE ANTENNA PATTERN DEVIATION

2018 ◽  
Vol 19 (1) ◽  
pp. 66-75
Author(s):  
G.I. Kalabegashvili ◽  
◽  
E.V. Bikeev ◽  
M.G. Mathylenko ◽  
◽  
...  
Keyword(s):  
Antenna Pattern ◽  
Large Size ◽  
Pattern Deviation ◽  
Reflecting Surface

scholarly journals The determination of wormwheel toothing surface

2018 ◽  
Vol 157 ◽  
pp. 01013 ◽  
Author(s):  
Tadeusz Nieszporek ◽  
Rafał Gołębski ◽  
Piotr Boral
Keyword(s):  
Numerical Methods ◽  
Helical Surface ◽  
Heavy Industry ◽  
Manufacturing Costs ◽  
Rotary Tool ◽  
Large Size ◽  
Envelope Method ◽  
Worm Gears ◽  
Very High

In heavy industry (metallurgy, mining), large-size worm gears designed to carry large loads are often used. However, their technology is very difficult and their manufacturing costs are very high. In practice, cone-derivative worm gears are most often used, which are machined by the envelope method using a rotary tool. The literature has given much coverage to the determination of the worm helical surface. The surface of wormwheel teeth is much less commonly described. Therefore, this paper presents an analytical and a numerical methods for generating the wormwheel toothing by the tangential and radial methods with a special cutter and with a modular hob.

Determine the Outcome of Traumatic Extradural Hematoma and to Compare the Outcome of Small and Large Size Extradural Hematoma

2021 ◽  
Vol 15 (10) ◽  
pp. 3363-3365
Author(s):  
Muhammad Pervez Khan ◽  
Muhammad Anwar
Keyword(s):  
Glasgow Outcome Score ◽  
Extradural Hematoma ◽  
Hematoma Volume ◽  
Common Cause ◽  
Descriptive Case Study ◽  
Large Size ◽  
Outcome Score ◽  
Male Patients

Objective: The aim of this study is to determine the outcome of traumatic extradural hematoma and to compare the outcome of small and large size extradural hematoma. Study Design: Descriptive case study Place and Duration: Study was conducted at the department of Neurosurgery, Saidu Teaching Hospital, Saidu Sharif, Swat for duration of two years from January 2016 to December 2017. Methods: Total one hundred and forty patients of both genders with ages 2-70 years were presented. Patients had traumatic extradural hematoma within duration first 24 hours were included and admitted through the emergency department. Detailed demographics of enrolled cases age, sex, GCS on arrival and cause of injury were recorded after taking informed written consent. CT scan of all the patients was done for diagnosis. Glasgow Outcome Score (GOS) was used for determination of outcomes. SPSS 23.0 version was used to analyze the data. Results: There were 110 (78.6%) male patients and 30 (21.4%) patients were females. Mean age of the patients was 32.78±10.43 years. RTA was the most common cause found in 84 (60%) followed by falling 29 (20.7%) and assault in 27 (19.3%). Small size hematoma volume among 100 (71.4%) cases and large size was in 40 (28.6%) patients. According to Glasgow outcome score, 24 (17.1%) cases had 1-3 score and 116 (82.9%) cases had 4-5 score. Mean GOS was 4.01±1.12. We found successful outcomes among 116 (82.9%) cases in which majority of the patients were from small size extradural hematoma. Conclusion: We concluded in this study that a significant relationship exists between the volume of extradural hematoma and both the clinical and functional outcome. Prognosis becomes increasingly worse with rising extradural hematoma size. Keywords: Traumatic Brain Injury, Extradural Hematoma, Glasgow Outcome Score

Borrowing external information to estimate angler size selectivity: model development and application to Murray cod

2020 ◽  
Vol 77 (2) ◽  
pp. 425-437
Author(s):  
Daniel C. Gwinn ◽  
Gavin Butler ◽  
Brett Ingram ◽  
Scott Raymond ◽  
Mark Lintermans ◽  
...  
Keyword(s):  
Model Development ◽  
External Information ◽  
Size Selectivity ◽  
Large Size ◽  
Data Limitations ◽  
Vulnerability Model ◽  
Selectivity Model ◽  
Murray Cod ◽  
Modelling Approach

Estimating the size selectivity of fishery users and sampling methods can be difficult to achieve due to data limitations. However, these limitations can be moderated by borrowed information from other sources such as other systems, times, and species. Here we develop a model that integrates an externally sourced boat electrofishing length–vulnerability model with internally sourced boat electrofishing and angling catch data to estimate length-dependent vulnerability of fish to angling in a data-limited situation. We apply the model to Murray cod (Maccullochella peelii) as an example and show that angling for Murray cod selectively captures a narrow range of sizes that includes medium to large size fish. Although boat electrofishing also followed a similar pattern, the range of fish sizes vulnerable to capture was much broader, including a more uniform vulnerability of all size classes evaluated. Understanding the length selectivity to capture has key implications for effective determination of fisheries regulations, as well as interpreting monitoring data. Thus, we see this modelling approach as a good option when more informative data are not available to support the estimation process.

New Theoretical Approach of the Fracture Ductility of Steels and its Relation with the Microscopy Structural Characterization

2010 ◽  
Vol 449 ◽  
pp. 96-103
Author(s):  
Viacheslav A. Yermishkin ◽  
Pedro A. Tamayo Meza ◽  
N. Muñoz Aguirre ◽  
M. Mendez Arait ◽  
D. Vilchis Leonardo
Keyword(s):  
Mechanical Characteristics ◽  
Theoretical Determination ◽  
Large Size ◽  
Fracture Ductility ◽  
Mechanical Methods ◽  
New Material ◽  
Dislocational Structure ◽  
First Time ◽  
Microscopy Images

It is well known that the formation of a highly hardening state of the standard steels is related with the improvement of its mechanical characteristics, which means an increment in the ductility of the fracture. Commonly, the ductility of the fracture is measured by means of mechanical methods involving large size and geometrical special shape of the sample. Satisfy these requirements in the initial steps of the development of a new material, or during the treatment for improving the hardness, is a dif ficult task. The present work shows the theoretical determination of the ductility of the fracture when the researchers have a small piece of the sample. Also, from the analysis of microscopy images, by the first time, it is demonstrated that an ultra-hardening state of the steel corresponds to a nano-fragmented dislocational structure in accordance to the theory.

scholarly journals The dynamics of low pay employment in Australia

2015 ◽  
Vol 36 (7) ◽  
pp. 1095-1123 ◽  
Author(s):  
Lixin Cai
Keyword(s):  
Hazard Rate ◽  
Early Stage ◽  
Descriptive Analysis ◽  
Content Type ◽  
Large Size ◽  
Information Gap ◽  
English Speaking ◽  
Low Pay ◽  
Pay Duration

Purpose – The purpose of this paper is to enhance understanding low pay dynamics of Australian employees, with a focus on the determination of low pay duration. Design/methodology/approach – The study draws on a representative longitudinal survey of Australian households to provide empirical findings from both descriptive analysis and econometric modelling. Findings – The results show that workers who have entered low pay from higher pay also have a higher hazard rate of transitioning to higher pay; and those who have entered low pay from non-employment are more likely to return to non-employment. Union members, public sector jobs and working in medium to large size firms tend to increase the hazard rate of transitioning to higher pay, while immigrants from non-English speaking countries and workers with health problems have a lower hazard rate of moving into higher pay. There is some evidence that the longer a worker is on low pay, the less likely he or she is to transition to higher pay. Originality/value – This study addresses an information gap regarding the determination of low pay duration. The findings help identify workers who are at high risk of staying on low pay or transitioning into non-employment and are therefore informative for developing targeted policy to help the low paid maintain employment and/or move up the earnings ladder. The results also suggest that policy intervention should take place at an early stage of a low pay spell.

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