scholarly journals The improvement of an elastic hinge-type torque standard machine in NIMT

ACTA IMEKO ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 36
Author(s):  
Nattapon Saenkhum ◽  
Tassanai Sanponpute
Keyword(s):  
Bending Moment ◽  
Measurement Range ◽  
Metal Plate ◽  
Centre Of Gravity ◽  
Calibration And Measurement Capabilities ◽  
Torque Measurements ◽  
Low Torque ◽  
The Right ◽  
Transducer Calibration ◽  
Better Than

<p class="Abstract" align="left">The National Institute of Metrology of Thailand’s (NIMT) strain-controlled elastic hinge-type torque standard machine was designed to cover a measuring range of 1 N·m to 1 kN·m. The elastic hinge was used both at the fulcrum and the hanger of the lever arms. The designed elastic hinge’s thickness, 0.50 mm, caused a higher stiffness than a sheet metal plate of other types of torque machines. The bending moment of all elastic hinges affected the sum of the torque signal on the lever arm that was used to observe the balancing of the lever. The residual torque sensitivity, which was no better than 0.20 mN·m, significantly affected the uncertainty of the low-range torque realisation.</p><p class="Abstract">The calibration and measurement capabilities of the machine were 0.010 % (<em>k</em> = 2) in the measurement range of 10 N·m to 1 kN·m and 0.030 % (<em>k</em> = 2) in the measurement range of 1 N·m to 10 N·m. In the transducer calibration, the influence of the random bending moment of the elastic hinge affected the repeatability, reproducibility, and linearity of the low torque measurements. The cause of the bending moment of the elastic hinges was a result of the deviation of the centre of gravity (CG) of the weight on the pan from the reference line. To improve CMCs, separate signal calibrations were selected for this experiment i.e. the left hinge, the right hinge, and the fulcrum. The torque in each signal calibration was combined by software and was used to correct the calibration value of the torque.</p>

Finding the Right Problems: Some HREM Applications to Interfaces

1984 ◽  
Vol 42 ◽  
pp. 376-379
Author(s):  
D. Cherns
Keyword(s):  
Grain Boundaries ◽  
High Resolution Electron Microscopy ◽  
Boundary Structure ◽  
Atomic Structures ◽  
Grain Boundary Structure ◽  
Resolution Electron ◽  
Point To Point ◽  
The Right ◽  
New Generation ◽  
Better Than

The use of high resolution electron microscopy (HREM) to determine the atomic structure of grain boundaries and interfaces is a topic of great current interest. Grain boundary structure has been considered for many years as central to an understanding of the mechanical and transport properties of materials. Some more recent attention has focussed on the atomic structures of metalsemiconductor interfaces which are believed to control electrical properties of contacts. The atomic structures of interfaces in semiconductor or metal multilayers is an area of growing interest for understanding the unusual electrical or mechanical properties which these new materials possess. However, although the point-to-point resolutions of currently available HREMs, ∼2-3Å, appear sufficient to solve many of these problems, few atomic models of grain boundaries and interfaces have been derived. Moreover, with a new generation of 300-400kV instruments promising resolutions in the 1.6-2.0 Å range, and resolutions better than 1.5Å expected from specialist instruments, it is an appropriate time to consider the usefulness of HREM for interface studies.

Biomechanical characteristics of allogeneic cortical bone pins designed for fracture fixation

2008 ◽  
Vol 21 (02) ◽  
pp. 140-146
Author(s):  
M. R. Edwards ◽  
S. P. James ◽  
W. S. Dernell ◽  
R. J. Scott ◽  
A. M. Bachand ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Cortical Bone ◽  
Fracture Fixation ◽  
Impact Testing ◽  
Left Tibia ◽  
Four Point Bending ◽  
And Gender ◽  
The Right ◽  
Biomechanical Comparison ◽  
Better Than

SummaryThe biomechanical characteristics of 1.2 mm diameter allogeneic cortical bone pins harvested from the canine tibia were evaluated and compared to 1.1 mm diameter stainless steel pins and 1.3 mm diameter polydioxanone (PDS) pins using impact testing and four-point bending. The biomechanical performance of allogeneic cortical bone pins using impact testing was uniform with no significant differences between sites, side, and gender. In four-point bending, cortical bone pins harvested from the left tibia (204.8 ± 77.4 N/mm) were significantly stiffer than the right tibia (123.7 ± 54.4 N/mm, P=0.0001). The site of bone pin harvest also had a significant effect on stiffness, but this was dependent on interactions with gender and side. Site C in male dogs had the highest mean stiffness in the left tibia (224.4 ± 40.4 N/mm), but lowest stiffness in the right tibia (84.9 ± 24.2 N/mm). Site A in female dogs had the highest mean stiffness in the left tibia (344.9 ± 117.4 N/mm), but lowest stiffness in the right tibia (60.8 ± 3.7 N/mm). The raw and adjusted bending properties of 1.2 mm cortical bone pins were significantly better than 1.3 mm PDS pins, but significantly worse than 1.1 mm stainless steel pins (P<0.0001). In conclusion, cortical bone pins may be suitable as an implant for fracture fixation based on initial biomechanical comparison to stainless steel and PDS pins used in clinical practice.

scholarly journals Skill and strategic control

Synthese ◽  
2021 ◽  
Author(s):  
Ellen Fridland
Keyword(s):  
Decision Making ◽  
Empirical Evidence ◽  
Mental Imagery ◽  
Sports Psychology ◽  
Mental Practice ◽  
Strategic Control ◽  
Cognitive Representations ◽  
Personal Level ◽  
The Right ◽  
Better Than

AbstractThis paper provides an account of the strategic control involved in skilled action. When I discuss strategic control, I have in mind the practical goals, plans, and strategies that skilled agents use in order to specify, structure, and organize their skilled actions, which they have learned through practice. The idea is that skilled agents are better than novices not only at implementing the intentions that they have but also at forming the right intentions. More specifically, skilled agents are able formulate and modify, adjust and adapt their practical intentions in ways that are appropriate, effective, and flexible given their overall goals. Further, to specify the kind of action plans that are involved in strategic control, I’ll rely on empirical evidence concerning mental practice and mental imagery from sports psychology as well as evidence highlighting the systematic differences in the cognitive representations of skills between experts and non-experts. I’ll claim that, together, this evidence suggests that the intentions that structure skilled actions are practical and not theoretical, that is, that they are perceptual and motor and not abstract, amodal, or linguistic. Importantly, despite their grounded nature, these plans are still personal-level, deliberate, rational states. That is, the practical intentions used to specify and structure skilled actions are best conceived of as higher-order, motor-modal structures, which can be manipulated and used by the agent for the purpose of reasoning, deliberation, decision-making and, of course, the actual online structuring and organizing of action.

The Right to Be Right: Civil-Military Relations and the Iraq Surge Decision

2011 ◽  
Vol 35 (4) ◽  
pp. 87-125 ◽  
Author(s):  
Peter D. Feaver
Keyword(s):  
Hybrid Approach ◽  
Interesting Case ◽  
Civil Military Relations ◽  
Military Commanders ◽  
The Right ◽  
Military Relations ◽  
The Military ◽  
President Bush ◽  
Primary Problem ◽  
Better Than

President George W. Bush's Iraq surge decision in late 2006 is an interesting case for civil-military relations theory, in particular, the debate between professional supremacists and civilian supremacists over how much to defer to the military on decisions during war. The professional supremacists argue that the primary problem for civil-military relations during war is ensuring the military an adequate voice and keeping civilians from micromanaging and mismanaging matters. Civilian supremacists, in contrast, argue that the primary problem is ensuring that well-informed civilian strategic guidance is authoritatively directing key decisions, even when the military disagrees with that direction. A close reading of the available evidence—both in published accounts and in new, not-for-attribution interviews with the key players—shows that the surge decision vindicates neither camp. If President Bush had followed the professional supremacists, there would have been no surge because his key military commanders were recommending against that option. If Bush had followed the civilian supremacists to the letter, however, there might have been a revolt of the generals, causing the domestic political props under the surge to collapse. Instead, Bush's hybrid approach worked better than either ideal type would have.

scholarly journals When brain damage “improves” perception: neglect patients can localize motion-shifted probes better than controls

2015 ◽  
Vol 114 (6) ◽  
pp. 3351-3358 ◽  
Author(s):  
Stefania de Vito ◽  
Marine Lunven ◽  
Clémence Bourlon ◽  
Christophe Duret ◽  
Patrick Cavanagh ◽  
...  
Keyword(s):  
Right Hemisphere ◽  
Visual Fields ◽  
Critical Factor ◽  
Significant Shift ◽  
Stimulus Motion ◽  
Attentional Processes ◽  
Position Shift ◽  
The Right ◽  
High Level ◽  
Better Than

When we look at bars flashed against a moving background, we see them displaced in the direction of the upcoming motion (flash-grab illusion). It is still debated whether these motion-induced position shifts are low-level, reflexive consequences of stimulus motion or high-level compensation engaged only when the stimulus is tracked with attention. To investigate whether attention is a causal factor for this striking illusory position shift, we evaluated the flash-grab illusion in six patients with damaged attentional networks in the right hemisphere and signs of left visual neglect and six age-matched controls. With stimuli in the top, right, and bottom visual fields, neglect patients experienced the same amount of illusion as controls. However, patients showed no significant shift when the test was presented in their left hemifield, despite having equally precise judgments. Thus, paradoxically, neglect patients perceived the position of the flash more veridically in their neglected hemifield. These results suggest that impaired attentional processes can reduce the interaction between a moving background and a superimposed stationary flash, and indicate that attention is a critical factor in generating the illusory motion-induced shifts of location.

Fully Plastic Failure Stresses and Allowable Crack Sizes for Circumferentially Surface Cracked Pipes Subjected to Tensile Loading

2021 ◽  
Author(s):  
Kunio Hasegawa ◽  
David Dvorak ◽  
Vratislav Mares ◽  
Bohumir Strnadel ◽  
Yinsheng Li
Keyword(s):  
Experimental Data ◽  
Bending Moment ◽  
Limit Load ◽  
Tensile Loading ◽  
Crack Size ◽  
Plastic Failure ◽  
Circumferential Crack ◽  
Asme Code ◽  
American Society ◽  
Better Than

Abstract Fully plastic failure stresses for circumferentially surface cracked pipes subjected to tensile loading can be estimated by means of limit load criteria based on the net-section stress approach. Limit load criteria of the first type (labelled LLC-1) were derived from the balance of uniaxial forces. Limit load criteria of the second type are given in Section XI of the ASME (American Society of Mechanical Engineering) Code, and were derived from the balance of bending moment and axial force. These are labelled LLC-2. Fully plastic failure stresses estimated by using LLC-1 and LLC-2 were compared. The stresses estimated by LLC-1 are always larger than those estimated by LLC-2. From the literature survey of experimental data, failure stresses obtained by both types of LLC were compared with the experimental data. It can be stated that failure stresses calculated by LLC-1 are better than those calculated by LLC-2 for shallow cracks. On the contrary, for deep cracks, LLC-2 predictions of failure stresses are fairly close to the experimental data. Furthermore, allowable circumferential crack sizes obtained by LLC-1 were compared with the sizes given in Section XI of the ASME Code. The allowable crack sizes obtained by LLC-1 are larger than those obtained by LLC-2. It can be stated that the allowable crack size for tensile stress depends on the condition of constraint of the pipe, and the allowable cracks given in Section XI of the ASME Code are conservative.

Research on Safety Vehicle Distance Recognition Based on Stereo Vision and DSP

2013 ◽  
Vol 333-335 ◽  
pp. 805-810 ◽  
Author(s):  
Rong Bao Chen ◽  
Ning Li ◽  
Hua Feng Xiao ◽  
Wei Hou
Keyword(s):  
Stereo Vision ◽  
Traffic Safety ◽  
Traffic Accidents ◽  
Intelligent Transportation ◽  
Research Area ◽  
Measurement Range ◽  
Vehicle Speed ◽  
Target Vehicle ◽  
Operation Rate ◽  
The Right

With the development of economy, there are an increasing number of cars as well as traffic accidents, thus intensifying the need to take measures to reduce traffic accidents and protect the safety of life and property. Vehicle distance is one of the most important indexes of traffic safety. The measurement of safety vehicle distance has become an increasingly hot research area of intelligent transportation. Through analyzing the basic principle of stereo vision and calibrating the parameters of the CCD sensors both inside and outside, this paper comes up with a method to measure the former vehicle distance based on stereo vision and DSP. Once the vehicle speed and distance form a non-security association, it will give a warning, and upload data or force speed-limiting. According to the different coordinates of the obtained images of the target vehicle from the left and the right sensor, this method can identify feature points, calculate distance to the target vehicle, and analyze the security of vehicle distance. The experimental results show that this method has wide measurement range, high measurement accuracy, and fast operation rate, thus it can meet the actual needs of the measurement of safe vehicle distance in intelligent transportation.

scholarly journals The Prospects for Diversification of Slovak Export to Asia

2015 ◽  
Vol 2 (2) ◽  
pp. 14-22
Author(s):  
Radomír Boháč
Keyword(s):  
Trade Balance ◽  
Professional Experience ◽  
Economic Downturn ◽  
State Control ◽  
Global Level ◽  
Working Population ◽  
Centre Of Gravity ◽  
The Right ◽  
Global Growth ◽  
The Eu

The centre of gravity of international trade has been shifting eastwards; 2 of 3 largest economies come from Asia. It witnessed 6.9% growth in 2014, much above the 2.6% on the global level. Credit goes in full to continent’s hard working population. It is presumed that 90% of the global growth within the next 10 – 15 years will be generated outside Europe; the majority of it in Asia. By 2050 a half of the global GDP will be generated there. Asia represents the global model in promoting R&D and innovations; it has become the key trading partner of the EU, with strategic partners in China, India, Japan, and South Korea. Numerous EU´s FTAs are being negotiated, hopefully eliminating remaining barriers to trade. The contribution focuses on prospects which are emanating for Slovakia and the Western liberal economic model vis-a-vis state control. It discusses the China’s economic downturn as a risk but also as a new opportunity. Slovak prosperity is vitally interlinked with the performance of export. It disproportionately depends on the EU. Out of the first eight countries within Slovakia‘s negative trade balance statistics, six come from Asia. Thus Asia should imperatively facilitate diversification of Slovak economy. The paper attempts to establish a frank and open picture of the state of the game, with the right balance between theory and authentic professional experience of the author. It assesses key Slovak strengths and weaknesses, identifies opportunities and offers a “food for thought”.

scholarly journals 2D IPO's for Constant Speed Lines, Curves, NURBS

2019 ◽  
Author(s):  
Valere Huypens
Keyword(s):  
Major Axis ◽  
Pulse Method ◽  
Constant Speed ◽  
Sampled Data ◽  
Reference Pulse ◽  
Production Manager ◽  
Definition Of ◽  
The Right ◽  
2D And 3D ◽  
Better Than

<div>Current constant speed IPO's, usually, use Sampled-data IPO's and constant speed lines use the </div><div>wrong initialized software DDA-ipo's, which make these IPO's unusable. The Bresenham- and </div><div>midpoint IPO's are non-constant speed reference pulse IPO's with bounded inaccuracy.</div><div>By adding an ultra-fast 3-lines algorithm "PRM-cs" to the actual midpoint or Bresenham algorithms, </div><div>we convert these midpoint-ipo's to very fast, constant speed, reference pulse IPO's. </div><div>This applies to 2D-lines, 3D-lines, 2D-curves and 2D-NURBS.</div><div>The PRM-cs measures, in real-time, the length of the discrete curve and the PRM-cs is completely new. </div><div>We define the best IPO, the major axis principle and the LSD-priority. </div><div>The major axis principle holds for the actual 3D-line IPO's. These IPO's are, generally, inaccurate, </div><div>but they can be updated to constant speed 3D-line IPO's, when the production manager agrees.</div><div>The Digital Geometric Geometry (DAG) defines the discrete lines globally, but this global </div><div>definition of a discrete 3D-line, gives discrete 3D-lines whose accuracy is much less than the </div><div>accuracy of the best discrete 3D-lines (e.g. 37% worse).</div><div>We describe the three causes of the inaccurate (imperfect) discrete 3D-lines. </div><div>All existing pulse-rate or PRM-ipo's use a wrong initialization, which deteriorates the accuracy. </div><div>We determine the right initialization for the new PRM-cs and the updated PRM-ipo. </div><div>We propose the benchmark-ipo "listSIM-ipo". This constant speed IPO can, also, be used in real-</div><div>time for every 2D- and 3D-curve. </div><div>The 3rd-degree Trident NURB shows that the constant speed reference pulse method is much </div><div>better than the existing sampled-data methods.</div>

scholarly journals RESPONS NAPHTHALEN ACETIC ACID DAN UNSUR MIKRO MIKOMBI SUPER TERHADAP CHERELLE WILT PADA TANAMAN KAKAO

EUGENIA ◽  
2012 ◽  
Vol 21 (3) ◽  
Author(s):  
Stanley A.F. Walingkas ◽  
Meity Rantung
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Nutrient Elements ◽  
The Third ◽  
Significant Difference ◽  
Treatment Factor ◽  
The Right ◽  
Micro Elements ◽  
Better Than

ABSTRACT This study aims to determine the effect of plant growth regulators and micro elements to cherelle wilt in cacao plants as well as finding the right business in tackling cherelle wilt in cacao plants. The research was carried out in the garden village folk Eris Eris Minahasa district for 8 months from January to August 2009. Spraying micro-nutrient elements is necessary to reduce cherelle wilt because the various treatments for the first observation is not significantly different, but the observations into two to seven observations to indicate a significant difference between treatments (percentage cherelle wilt on treatment without nutrient elements higher than sprayed). While spraying the treatment factor of plant growth regulators (NAA) is not necessary because the first observation and the two had no significant effect on the percentage of cherelle wilt affected only the third observation and further observations to a fourth, fifth, sixth and seventh again no effect. So is the treatment for fruit length and diameter showed that administration of the micro nutrients necessary for sprayed with micro nutrients result 22.10 cm higher than that is not sprayed is 19.43 cm. As for the diameter of the fruit is affected by plant growth regulators. Treatment is better than 200 ppm 100 ppm and 0 ppm (control). Keywords: NAA, cocoa, mikombi     ABSTRAK   Penelitian ini bertujuan mengetahui pengaruh pemberian zat pengatur tumbuh dan unsur mikro terhadap cherelle wilt pada tanaman kakao serta menemukan usaha yang tepat dalam menanggulangi cherelle wilt pada tanaman kakao. Penelitian ini dilaksanakan di kebun rakyat Desa Eris Kecamatan Eris Kabupaten Minahasa selama 8 bulan sejak Januari – Agustus 2009. Penyemprotan unsur hara mikro perlu dilakukan untuk mengurangi cherelle wilt sebab pada berbagai perlakuan untuk pengamatan pertama tidak berbeda nyata namun pada pengamatan ke dua sampai pengamatan ke tujuh menunjukkan adanya perbedaan nyata antar perlakuan (prosentase cherelle wilt pada perlakuan tanpa unsure hara lebih tinggi dari yang disemprot). Sementara faktor penyemprotan dengan perlakuan zat pengatur tumbuh (NAA) tidak perlu dilakukan sebab pengamatan pertama dan ke dua tidak berpengaruh nyata pada persentase cherelle wilt hanya berpengaruh pada pengamatan ke tiga dan selanjutnya pengamatan ke empat, ke lima, ke enam dan ke tujuh kembali tidak berpengaruh. Begitu juga perlakuan untuk panjang dan diameter buah menunjukkan bahwa pemberian unsur hara mikro perlu dilakukan sebab yang disemprot dengan unsur hara mikro hasilnya 22,10 cm lebih tinggi dari yang tidak disemprot yaitu 19,43 cm. Sementara untuk diameter buah dipengaruhi oleh zat pengatur tumbuh. Perlakuan 200 ppm lebih baik dari 100 ppm dan 0 ppm (kontrol). Eugenia Volume 18 No. 2  Agustus 2012 Kata kunci : NAA, kakao, mikombi

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