Challenges in the Design of Propulsion Shafting

2021 ◽  
Author(s):  
John Kokarakis
Keyword(s):  
Sea Water ◽  
Weak Links ◽  
Critical Component ◽  
Lubrication Oil ◽  
Three Components

Shafting system in a ship is probably its most critical component. Problems in the propulsion shafting, connecting engine with propeller may let the vessel dead in the water. This study focuses on three components of the shafting system which are well known to cause problems. These are the aft stern tube bearing, the coupling bolts and the sealing arrangement which prevents the ingress of sea water or the leakage of lubrication oil to the sea. A variety of issues related to these “weak” links of the shafting system is analyzed, based on actual cases of damage.

scholarly journals Science and data science

2017 ◽  
Vol 114 (33) ◽  
pp. 8689-8692 ◽  
Author(s):  
David M. Blei ◽  
Padhraic Smyth
Keyword(s):  
Data Science ◽  
Critical Component ◽  
Effective Combination ◽  
Three Components

Data science has attracted a lot of attention, promising to turn vast amounts of data into useful predictions and insights. In this article, we ask why scientists should care about data science. To answer, we discuss data science from three perspectives: statistical, computational, and human. Although each of the three is a critical component of data science, we argue that the effective combination of all three components is the essence of what data science is about.

The Jovian ring

1984 ◽  
Vol 75 ◽  
pp. 203-209
Author(s):  
Joseph A. Burns
Keyword(s):  
Equatorial Plane ◽  
Charged Particles ◽  
Dynamical Evolution ◽  
Main Band ◽  
Small Grains ◽  
Three Components

ABSTRACTLying in Jupiter's equatorial plane is a diaphanous ring having little substructure within its three components (main band, faint disk, and halo). Micron-sized grains account for much of the visible ring, but particles of centimeter sizes and larger must also be present to absorb charged particles. Since dynamical evolution times and survival life times are quite short (≲102-3yr) for small grains, the Jovian ring is being continually replenished; probably most of the visible ring is generated by micrometeoroids colliding into unseen parent bodies that reside in the main band.

A new type of defect structure in 124-superconducting oxide revealed by HREM

1991 ◽  
Vol 49 ◽  
pp. 1092-1093
Author(s):  
R. Sharma ◽  
B.L. Ramakrishna ◽  
N.N. Thadhani ◽  
D. Hianes ◽  
Z. Iqbal
Keyword(s):  
Shock Wave ◽  
Defect Structure ◽  
Neutron Radiation ◽  
Weak Links ◽  
Defect Structures ◽  
New Materials ◽  
New Type ◽  
Current Densities ◽  
Processing Techniques ◽  
Microstructural Studies

After materials with superconducting temperatures higher than liquid nitrogen have been prepared, more emphasis has been on increasing the current densities (Jc) of high Tc superconductors than finding new materials with higher transition temperatures. Different processing techniques i.e thin films, shock wave processing, neutron radiation etc. have been applied in order to increase Jc. Microstructural studies of compounds thus prepared have shown either a decrease in gram boundaries that act as weak-links or increase in defect structure that act as flux-pinning centers. We have studied shock wave synthesized Tl-Ba-Cu-O and shock wave processed Y-123 superconductors with somewhat different properties compared to those prepared by solid-state reaction. Here we report the defect structures observed in the shock-processed Y-124 superconductors.

The Unique Contribution of Positive Orientation to Optimal Functioning

2012 ◽  
Vol 17 (1) ◽  
pp. 44-54 ◽  
Author(s):  
Guido Alessandri ◽  
Gian Vittorio Caprara ◽  
John Tisak
Keyword(s):  
Psychological Functioning ◽  
Well Being ◽  
Unique Contribution ◽  
Critical Component ◽  
Positive Orientation ◽  
Cross Sectional ◽  
Common Mode ◽  
Optimal Functioning

Literature documents that the judgments people hold about themselves, their life, and their future are important ingredients of their psychological functioning and well-being, and are commonly related to each other. In this paper, results from a large cross-sectional sample (N = 1,331, 48% males) are presented attesting to the hypothesis that evaluations about oneself, one’s life, and one’s future rest on a common mode of viewing experiences named “Positive Orientation.” These results corroborate the utility of the new construct as a critical component of individuals’ well functioning.

Conscious and Unconscious Reward Cues Can Affect a Critical Component of Executive Control

2011 ◽  
Vol 58 (5) ◽  
pp. 370-375 ◽  
Author(s):  
Rémi L. Capa ◽  
Gaëlle M. Bustin ◽  
Axel Cleeremans ◽  
Michel Hansenne
Keyword(s):  
Correct Response ◽  
Executive Control ◽  
Critical Component ◽  
Arithmetic Operations ◽  
Component Process

The present study investigates whether updating an important function of executive control can be driven by unconscious reward cues. Participants had to memorize several numbers and update those numbers independently according to a sequence of arithmetic operations. At the beginning of each trial, a reward (1 euro or 5 cents) was presented, either subliminally or supraliminally. Participants could earn the reward if they found the correct response on the updating task. Results showed better performance when a high (conscious or unconscious) reward was at stake compared to a low reward. This suggests that subliminal information can influence a component process of executive control traditionally thought to require consciousness.

The client-coach relationship: Examining a critical component of successful coaching

2009 ◽  
Author(s):  
Lisa A. Boyce ◽  
Gina R. Hernez-Broome ◽  
Stephen J. Zaccaro
Keyword(s):  
Critical Component
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