A New Tightening Technique for Threaded Fasteners

1994 ◽  
Vol 116 (2) ◽  
pp. 64-69 ◽  
Author(s):  
M. Hagiwara ◽  
N. Ohashi
Keyword(s):  
Rotation Angle ◽  
High Accuracy ◽  
Experimental Results ◽  
New Technique ◽  
Relative Rotation ◽  
Threaded Fasteners ◽  
Accuracy And Precision ◽  
Different Types ◽  
A New Technique

A new technique for tightening threaded fasteners was proposed aiming to assure the quality and the reliability in the tightening operations. The technique is based on the torque difference and the relative rotation angle in tightening and loosening process, and no preliminary experiment is required. Repeated tightening (and loosening) experiments were performed for different types of lubricant to verify the applicability of this technique. Experimental results show that the preload provided to the joint can be estimated with high accuracy and precision by this technique, and the possibility to boost the reliability of tightening control is confirmed.

A Technique for the Laboratory Determination of Recirculation in Single Needle Dialysis

1993 ◽  
Vol 16 (2) ◽  
pp. 63-70 ◽  
Author(s):  
N.A. Hoenich ◽  
P.T. Smirthwaite ◽  
C. Woffindin ◽  
P. Lancaster ◽  
T.H. Frost ◽  
...  
Keyword(s):  
Experimental Data ◽  
Flow Rate ◽  
Experimental Results ◽  
New Technique ◽  
Treatment Efficiency ◽  
Single Lumen ◽  
Theoretical Predictions ◽  
Lumen Catheter ◽  
A New Technique

Recirculation is an important factor in single needle dialysis and, if high, can compromise treatment efficiency. To provide information regarding recirculation characteristics of access devices used in single needle dialysis, we have developed a new technique to characterise recirculation and have used this to measure the recirculation of a Terumo 15G fistula needle and a VasCath SC2300 single lumen catheter. The experimentally obtained results agreed well with those established clinically (8.5 ± 2.4% and 18.4 ± 3.4%). The experimental results have also demonstrated a dependence on access type, pump speeds and fistula flow rate. A comparison of experimental data with theoretical predictions showed that the latter exceeded those measured with the largest contribution being due to the experimental fistula.

scholarly journals The Abundance of the LMC Globular Cluster NGC 2213

1988 ◽  
Vol 126 ◽  
pp. 579-580
Author(s):  
Doug Geisler
Keyword(s):  
Globular Cluster ◽  
Main Sequence ◽  
High Accuracy ◽  
Magellanic Cloud ◽  
New Technique ◽  
Distance Modulus ◽  
Ccd Photometry ◽  
Cloud Clusters ◽  
A New Technique ◽  
Using Data

A new technique for determining accurate abundances in distant giants - Washington CCD photometry - has been applied to the intermediate-age LMC globular cluster NGC 2213. An abundance of −0.40 ± 0.15 was found from the analysis of 42 giants with V < 20, using data obtained with the 1.5 m telescope. Combined with published main-sequence photometry, the derived abundance indicates a true LMC distance modulus of 18.2 ± 0.2. A likely CN strong giant near the tip of the giant branch is identified. Abundances are also derived for a sample of 27 field giants. Results indicate that one could determine both the age and abundance of Magellanic Cloud clusters with high accuracy from Washington photometry using the 4 m in less than one hour of observing time per cluster.

scholarly journals An Approximate Analytical Approach for Systems of Fredholm Integro-Differential Equations of Fractional Order

2021 ◽  
Vol 15 ◽  
pp. 91-104
Author(s):  
Mudaffer Alnobani ◽  
Omar Abu Al Yaqin
Keyword(s):  
Differential Equations ◽  
High Accuracy ◽  
Ease Of Use ◽  
New Technique ◽  
Computational Time ◽  
Power Series Method ◽  
Residual Power Series Method ◽  
Residual Power Series ◽  
A New Technique ◽  
Residual Power

A new technique for solving a system of fractional Fredholm integro-differential equations (IDEs) is introduced in this manuscript. Furthermore, we present a review for the derivation of the residual power series method (RPSM) to solve fractional Fredholm IDEs in the paper done by Syam, as well as, corrections to the examples mentioned in that paper. The numerical results demonstrated the new technique’s applicability, efficacy, and high accuracy in dealing with these systems. On the other hand, a comparison has been done between the two schemes using the two corrected examples in addition to a problem that had been solved in many previous studies, and the results of these studies were compared with the new technique and RPSM. The comparison demonstrated clear superiority of our method over the RPSM for solving this class of equations. Moreover, they dispel the misconception that the RPSM works effectively on fractional Fredholm IDEs as mentioned in the paper done by Syam, whereas two problems solved by the RPSM produced an unaccepted error. Also, the comparison with the previous studies indicates the importance of the new method in dealing with the fractional Fredholm IDEs despite its simplicity, ease of use, and negligible computational time.

In-Process Measurement of Surface Roughness in Turning by Laser Beams

1981 ◽  
Vol 103 (2) ◽  
pp. 203-209 ◽  
Author(s):  
M. Shiraishi
Keyword(s):  
Surface Roughness ◽  
Optical Method ◽  
Experimental Results ◽  
Laser Beams ◽  
New Technique ◽  
Process Measurement ◽  
Feed Direction ◽  
A New Technique

A new technique for in-process measurement of surface roughness is introduced which employs an optical method by using double laser beams. This makes it possible to detect the surface roughness not only along the circumferential path but also along the feed direction even during machining. The experimental results show that the presence of chipping and chattering can be detected sensitively along both measurements directions and the maximum roughness value is always obtainable from the reading along the feed direction.

MolDock:  A New Technique for High-Accuracy Molecular Docking

2006 ◽  
Vol 49 (11) ◽  
pp. 3315-3321 ◽  
Author(s):  
René Thomsen ◽  
Mikael H. Christensen
Keyword(s):  
Molecular Docking ◽  
High Accuracy ◽  
New Technique ◽  
A New Technique

Performance Upgrade of Pantograph Using Variable Stiffness Device

2010 ◽  
Author(s):  
Yoshitaka Yamashita ◽  
Mitsuru Ikeda
Keyword(s):  
Numerical Simulation ◽  
Dynamic Characteristics ◽  
Variable Stiffness ◽  
Experimental Results ◽  
New Technique ◽  
Current Collection ◽  
Simulation Results ◽  
Basic Characteristics ◽  
A New Technique

This paper proposes a new technique to improve the current collection performance of pantographs. For this purpose, the pan springs, which are usually coil springs, are replaced with variable stiffness devices. The device described in this paper is comprised of two air springs facing each other. This paper firstly outlines the method for the improvement for current collection performance and exhibits some numerical simulation results, which supports the efficacy of the method. It then presents the prototype of the variable stiffness device and shows its basic characteristics. Finally, it shows the experimental results of the dynamic characteristics control of a pantograph using the variable stiffness devices.

scholarly journals The mortality of the haemolytic Streptococcus on the skin and on other surfaces

1938 ◽  
Vol 38 (5) ◽  
pp. 575-586 ◽  
Author(s):  
J. M. L. Burtenshaw
Keyword(s):  
Experimental Work ◽  
Experimental Results ◽  
New Technique ◽  
Haemolytic Streptococcus ◽  
School Of Medicine ◽  
National School ◽  
Technical Assistant ◽  
A New Technique

1. A new technique is described for recovering applied organisms from the skin and other surfaces.2. Experiments are analysed, in which staphylococci and streptococci are recovered by this technique from various areas of the skin and from glass and rubber.3. It is concluded that the surfaces examined can be arranged in a definite order of decreasing disinfectant power.4. The peculiar disinfectant power of rubber is considered.5. The deterioration in surface viability of streptococci still surviving in saline suspension is described.6. The experimental results are discussed in the light of previous investigations.My grateful thanks are due to Professor J. B. Duguid, Department of Pathology and Bacteriology, Welsh National School of Medicine, Cardiff, for his patient counsel and criticism, and to Mr J. P. Napper, Technical Assistant for his skill in making apparatus and his help in the experimental work.

Ultrasound-guided lumbar facet nerve block: high accuracy of a new technique confirmed by CT-scan control

2004 ◽  
Vol 21 (Supplement 32) ◽  
pp. 112
Author(s):  
M. Greher ◽  
L. Kirchmair ◽  
B. Enna ◽  
P. Kovacs ◽  
B. Gustorff ◽  
...  
Keyword(s):  
Ct Scan ◽  
Nerve Block ◽  
High Accuracy ◽  
New Technique ◽  
Ultrasound Guided ◽  
A New Technique ◽  
Lumbar Facet

scholarly journals Ultrasound Modulation of Diffusive Optical Waves for Medical Imaging

2000 ◽  
Author(s):  
Daniel J. Townsend ◽  
Jonathan J. Stott ◽  
Ronald A. Roy ◽  
Charles A. DiMarzio
Keyword(s):  
Medical Imaging ◽  
Focused Ultrasound ◽  
Optical Tomography ◽  
The Body ◽  
Experimental Results ◽  
New Technique ◽  
Physical Limitation ◽  
Tissue Phantoms ◽  
Ultrasound Modulation ◽  
A New Technique

Abstract Diffusive optical tomography [DOT] is a technique for imaging within the body. While DOT provides excellent results under good conditions, there are many situations (due to anatomy or other physical limitation) in which it suffers from a “limited view” problem. In this paper we discuss our work on a new technique for combining DOT with focused ultrasound to generate virtual sources of illumination. These virtual sources help overcome the limited view problem. We present our experimental results using laboratory tissue phantoms.

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