V. D. L. Adult psychomotor test series for the measurement of manual ability and V. D. L. Psychomotor test series for children for the measurement of manual ability.

1950 ◽  
Vol 34 (5) ◽  
pp. 371-372
Author(s):  
Robert H. Seashore
Keyword(s):  
2005 ◽  
Author(s):  
Daniel A. Steinhurst ◽  
James A. Lynch ◽  
Daniel T. Gottuk ◽  
Jeffrey C. Owrutsky ◽  
Herbert H. Nelson ◽  
...  

2005 ◽  
Author(s):  
James A. Lynch ◽  
Daniel T. Gottuk ◽  
Jeffrey C. Owrutsky ◽  
Daniel A. Steinhurst ◽  
Christian P. Minor ◽  
...  

2012 ◽  
Vol 3 (3) ◽  
pp. 243-250
Author(s):  
A. Loosveld ◽  
W. De Waele ◽  
K. Faes ◽  
O. Zaitov

The goal of this master thesis is to realize and investigate leak tightness of joints produced by theelectromagnetic pulse (EMP) crimping process. This way of joining metals has gained more attention lately.With EMP welding, leak tight joints can already be achieved. However, the crimping process has somemajor advantages over EMP welding like the fact that more material combinations are possible and itrequires less energy. To realize the leak tightness, two kinds of sealing materials are used: O-rings andadhesives. The workpieces consist of an aluminium or stainless steel tube which is crimped on a solidaluminium mandrel with circumferential grooves in it. First, some preliminary tests are performed todetermine how much the tubes deform in the grooves. This deformation mainly depends on the appliedcharging voltage and the geometry of the groove. With this information, it is possible to estimate the amountof compression an O-ring would undergo when placed inside this groove. On other workpieces, adhesiveswill be applied. Several test procedures can be conducted on the parts to investigate leak tightness. Theresults of a helium test and a pressure burst test on the first test series conducted at the Walloon researchcentre CEWAC already showed that the use of O-rings can be effective.


2020 ◽  
Vol 93 (2) ◽  
pp. 326-330 ◽  
Author(s):  
Ute Hoyer-Tomiczek ◽  
Gernot Hoch

Abstract Early detection of infestation by the emerald ash borer (EAB), Agrilus planipennis is extremely difficult; hence developing additional methods is desirable. We built on the successful use of canine scent detection for the invasive long-horned beetles Anoplophora glabripennis and Anoplophora chinensis and trained six dogs in detection of EAB. A first test series was performed to evaluate detection accuracy of five of these dogs. Seven different experimental settings were tested under single blind conditions: (1) forest nursery, (2) piles of firewood, (3) firewood on the ground, (4) ash logs on the ground, (5) old urban ash trees, (6) urban forest with ash trees and (7) natural forest with ash trees. In total, 214 positive samples were presented to the dogs, out of which 20 remained undetected. The experiments ascertained sensitivity (correct positives of all positives) ranging from 73.3 to 100 percent and specificity (correct negatives of all negatives) from 88.9 to 99.8 percent in the tested settings. This initial study demonstrates that trained dogs are able to detect EAB scent from sources such as larval galleries in bark/wood, frass, living or dead larvae or dead dry beetles. The numbers of tested dogs and test series were limited, and further studies are needed to confirm the initial results. However, the preliminary findings demonstrate the potential of the method particularly for inspection of wood or plants at entry points.


CONDITIONS OF ODOR THRESHOLD DETERMINATION 2.1 Requirements for the test area Olfactonetric measurement should be undertaken in a roan or area which is kept free frcm odors. There should be an atmosphere of ccmfort and relaxation in the test chamber, which will encourage panel members to concentrate on the testing task and not to be distracted by external sti­ muli. The test should be carried out at roan temperature and normal humi­ dity. 2.2 General conditions for test procedure Odor measurements must be carried out with the help of a team leader, who instructs the panelists and operates the measuring equipment. Ccmnu-nication between the team leader and the panel has to be kept to an abso­ lute minimum. Because of fatigue, the duration of a test series as well as the time of the whole session should be limited. Breaks of at least the same duration as the proceeding test period should be provided. Germany France Nether­ United lands Kingdcm Panel leader yes yes yes yes duration of 15-30 min 20 min 15 min test series duration of breaks 15-30 min 20 min ? 5 min 30 min 2 test 2 hours time of a test 300 tests/ series of period day 20 tests Table 1: General conditions 3. DETECTION METHODS 3.1 Presentation of odor stimulus 3.1.1 Method of limits The most used method for establishing an absolute threshold in en­ vironmental studies is the Method of Limits. In its classical form, the stimuli are presented in alternating ascending and descending series, starting at different points to avoid having the subject fall into a rou­ tine. During this procedure there is a chance that adaptation phenomena may develop. An effort to minimize these effects is for example to use only an ascending series of stimuli. The threshold value for each sepa­ rate test series is defined as a point in-between the last undetected and the first detected point in the stimulus continuum. A modification of the method of limits is the "up and down" method. A stimulus is presented: if the response is positive, the next lower sti­ mulus is presented, if it is negative, the next higher is presented and so on. The primary advantage is, that it automatically concentrates near the mean and a considerable number of observations can be saved.


1978 ◽  
Author(s):  
D. W. Croucher ◽  
T. R. Yackle ◽  
C. M. Allison ◽  
S. A. Ploger

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