Conceptual and test phase of optical design of seeker in missile applications

2019 ◽  
Author(s):  
Dogan Ugur Sakarya ◽  
Hüseyin Sari
Keyword(s):  
Optical Design ◽  
Test Phase

Use of the Magnetostatic Analogue In Electromagnetic Lens Engineering

1970 ◽  
Vol 28 ◽  
pp. 360-361
Author(s):  
John W. Coleman
Keyword(s):  
Boundary Conditions ◽  
High Performance ◽  
Force Fields ◽  
Optical Design ◽  
Direct Conversion ◽  
Design Engineering ◽  
Design Data ◽  
Scalar Potentials ◽  
Geometric Elements ◽  
At Will

In the design engineering of high performance electromagnetic lenses, the direct conversion of electron optical design data into drawings for reliable hardware is oftentimes difficult, especially in terms of how to mount parts to each other, how to tolerance dimensions, and how to specify finishes. An answer to this is in the use of magnetostatic analytics, corresponding to boundary conditions for the optical design. With such models, the magnetostatic force on a test pole along the axis may be examined, and in this way one may obtain priority listings for holding dimensions, relieving stresses, etc..The development of magnetostatic models most easily proceeds from the derivation of scalar potentials of separate geometric elements. These potentials can then be conbined at will because of the superposition characteristic of conservative force fields.

Suppressed, but Not Forgotten

2011 ◽  
Vol 70 (1) ◽  
pp. 5-11 ◽  
Author(s):  
Beat Meier ◽  
Anja König ◽  
Samuel Parak ◽  
Katharina Henke
Keyword(s):  
Memory Trace ◽  
Thought Suppression ◽  
Test Phase ◽  
Indirect Test ◽  
Final Test ◽  
Test Experiment ◽  
And Control ◽  
Cue Words ◽  
The Impact

This study investigates the impact of thought suppression over a 1-week interval. In two experiments with 80 university students each, we used the think/no-think paradigm in which participants initially learn a list of word pairs (cue-target associations). Then they were presented with some of the cue words again and should either respond with the target word or avoid thinking about it. In the final test phase, their memory for the initially learned cue-target pairs was tested. In Experiment 1, type of memory test was manipulated (i.e., direct vs. indirect). In Experiment 2, type of no-think instructions was manipulated (i.e., suppress vs. substitute). Overall, our results showed poorer memory for no-think and control items compared to think items across all experiments and conditions. Critically, however, more no-think than control items were remembered after the 1-week interval in the direct, but not in the indirect test (Experiment 1) and with thought suppression, but not thought substitution instructions (Experiment 2). We suggest that during thought suppression a brief reactivation of the learned association may lead to reconsolidation of the memory trace and hence to better retrieval of suppressed than control items in the long term.

Acquisition and Use of Mental Operators: Effects of Type of Practice

2002 ◽  
Vol 49 (2) ◽  
pp. 141-152 ◽  
Author(s):  
Burkhard Müller ◽  
Jürgen Gehrke
Keyword(s):  
Mental Models ◽  
Test Performance ◽  
Physical World ◽  
Test Phase ◽  
Acquisition Phase ◽  
Practice Test ◽  
Subsequent Test ◽  
Use Of Knowledge

Abstract. Planning interactions with the physical world requires knowledge about operations; in short, mental operators. Abstractness of content and directionality of access are two important properties to characterize the representational units of this kind of knowledge. Combining these properties allows four classes of knowledge units to be distinguished that can be found in the literature: (a) rules, (b) mental models or schemata, (c) instances, and (d) episodes or chunks. The influence of practicing alphabet-arithmetic operators in a prognostic, diagnostic, or retrognostic way (A + 2 = ?, A? = C, or ? + 2 = C, respectively) on the use of that knowledge in a subsequent test was used to assess the importance of these dimensions. At the beginning, the retrognostic use of knowledge was worse than the prognostic use, although identical operations were involved (A + 2 = ? vs. ? - 2 = A). This disadvantage was reduced with increased practice. Test performance was best if the task and the letter pairs were the same as in the acquisition phase. Overall, the findings support theories proposing multiple representational units of mental operators. The disadvantage for the retrognosis task was recovered in the test phase, and may be evidence for the importance of the order of events independent of the order of experience.

Optical design to boost the performance of perovskite based tandem solar cells

2018 ◽  
Author(s):  
Miguel Anaya ◽  
Gabriel Lozano ◽  
Mauricio Calvo ◽  
Hernán Míguez
Keyword(s):  
Solar Cells ◽  
Optical Design ◽  
Tandem Solar Cells

Automatic Encoding of Gender by Three-Year-Old Children

2017 ◽  
Author(s):  
Gina T Bednarek ◽  
Kristin Shutts
Keyword(s):  
Test Phase ◽  
Older Children ◽  
Memory Errors ◽  
Automatic Encoding ◽  
Target Children

The present research tested whether three-year-old children – like older children and adults – automatically encode other people’s gender. Three-year-old participants (N = 24) learned facts about unfamiliar target children who varied in gender and were asked to remember facts about the targets during a test phase. At test, children made more within-category memory errors (e.g., misattributing a fact associated with one girl to another girl) than between-category errors (e.g., misattributing a fact associated with a girl to a boy). The findings suggest that at least as early as three years of age, children automatically encode whether someone is a boy or a girl upon first meeting them. The results have implications for our understanding of the automaticity and emergence of stereotyping processes.

Lossless Photon management – Optical design for manufacture at different length scales - NOLOSS - H2020

Impact ◽  
2018 ◽  
Vol 2018 (1) ◽  
pp. 48-50
Author(s):  
Toralf Scharf ◽  
Paul Urbach ◽  
Carsten Rockstuhl ◽  
Frank Setzpfand
Keyword(s):  
Optical Design ◽  
Length Scales ◽  
Design For Manufacture ◽  
Photon Management
Sign in / Sign up

Export Citation Format

Share Document