Small lens testing method using phase shift shearing interferometer

2009 ◽  
Author(s):  
Ryohei Hanayama ◽  
Katsuhiro Ishii ◽  
Kiyofumi Matsuda
Keyword(s):  
Phase Shift ◽  
Testing Method ◽  
Lens Testing

A New Design of Signal Source for Crosstalk Test of Multi-Channel Data Acquisition System

2012 ◽  
Vol 246-247 ◽  
pp. 1012-1016 ◽  
Author(s):  
Yan Hu Shan ◽  
Yong Feng Ren ◽  
Guo Yong Zhen ◽  
Xin Quan Jiao
Keyword(s):  
Phase Shift ◽  
Data Acquisition ◽  
Low Frequency ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Signal Source ◽  
Testing Method ◽  
System A ◽  
Rectangular Waveform ◽  
Effective Channel

For the multi-channel data acquisition system, crosstalk significantly affects the sample accuracy. Through analyzing the mode of multiplexer and the sampling timing sequence, we demonstrated that crosstalk effect mainly results from the switch of multiplexer for the low- frequency multi-channel data acquisition system. A new crosstalk testing method based on phase-shift rectangular waveform for the multi-channel data acquisition system was proposed. The phase-shift rectangular waveform was designed. Experiments were conducted to test crosstalk effect of the multi-channel data acquisition system. The experimental results were demonstrated that the proposed approach based on the phase-shift rectangular waveform exhibits a distinct feature in effective channel crosstalk testing, compared with waveforms of other types. Thus, the proposed method is effective to detect crosstalk of the multi-channel data acquisition system.

Lens Testing Method Based On The Boiling Phenomenon Of Laser Speckle

1985 ◽  
Author(s):  
Shin-ichi Komatsu ◽  
Toshio Morioka ◽  
Hitoshi Ohzu
Keyword(s):  
Laser Speckle ◽  
Testing Method ◽  
Lens Testing

Object Wave Determination by Single-Sideband Methods

1973 ◽  
Vol 31 ◽  
pp. 266-267
Author(s):  
Kenneth H. Downing ◽  
Benjamin M. Siegel
Keyword(s):  
Phase Shift ◽  
Carbon Films ◽  
Object Wave ◽  
Electron Wave ◽  
Phase Object ◽  
Heavy Atoms ◽  
Single Sideband ◽  
Thin Carbon ◽  
Additional Phase Shift ◽  
Additional Phase

Under the “weak phase object” approximation, the component of the electron wave scattered by an object is phase shifted by π/2 with respect to the unscattered component. This phase shift has been confirmed for thin carbon films by many experiments dealing with image contrast and the contrast transfer theory. There is also an additional phase shift which is a function of the atomic number of the scattering atom. This shift is negligible for light atoms such as carbon, but becomes significant for heavy atoms as used for stains for biological specimens. The light elements are imaged as phase objects, while those atoms scattering with a larger phase shift may be imaged as amplitude objects. There is a great deal of interest in determining the complete object wave, i.e., both the phase and amplitude components of the electron wave leaving the object.

A Many-Beam Technique for Enhanced Resolution of Partial Dislocations

1972 ◽  
Vol 30 ◽  
pp. 646-647
Author(s):  
J. M. Oblak ◽  
B. H. Kear
Keyword(s):  
Phase Shift ◽  
Field Method ◽  
Dark Field ◽  
Bright Field ◽  
Field Technique ◽  
Weak Beam ◽  
Partial Dislocations ◽  
Enhanced Resolution ◽  
Nickel Base ◽  
Beam Technique

The “weak-beam” and systematic many-beam techniques are the currently available methods for resolution of closely spaced dislocations or other inhomogeneities imaged through strain contrast. The former is a dark field technique and image intensities are usually very weak. The latter is a bright field technique, but generally use of a high voltage instrument is required. In what follows a bright field method for obtaining enhanced resolution of partial dislocations at 100 KV accelerating potential will be described.A brief discussion of an application will first be given. A study of intermediate temperature creep processes in commercial nickel-base alloys strengthened by the Ll2 Ni3 Al γ precipitate has suggested that partial dislocations such as those labelled 1 and 2 in Fig. 1(a) are in reality composed of two closely spaced a/6 <112> Shockley partials. Stacking fault contrast, when present, tends to obscure resolution of the partials; thus, conditions for resolution must be chosen such that the phase shift at the fault is 0 or a multiple of 2π.

Observation of surface morphology by reflection electron holography

1989 ◽  
Vol 47 ◽  
pp. 536-537
Author(s):  
N. Osakabe ◽  
J. Endo ◽  
T. Matsuda ◽  
A. Tonomura
Keyword(s):  
Phase Shift ◽  
Surface Morphology ◽  
High Sensitivity ◽  
High Energy ◽  
Path Difference ◽  
Transmission Mode ◽  
Electron Holography ◽  
Dynamical Process ◽  
High Vertical Resolution ◽  
Amplification Technique

Progress in microscopy such as STM and TEM-TED has revealed surface structures in atomic dimension. REM has been used for the observation of surface dynamical process and surface morphology. Recently developed reflection electron holography, which employes REM optics to measure the phase shift of reflected electron, has been proved to be effective for the observation of surface morphology in high vertical resolution ≃ 0.01 Å.The key to the high sensitivity of the method is best shown by comparing the phase shift generation by surface topography with that in transmission mode. Difference in refractive index between vacuum and material Vo/2E≃10-4 owes the phase shift in transmission mode as shownn Fig. 1( a). While geometrical path difference is created in reflection mode( Fig. 1(b) ), which is measured interferometrically using high energy electron beam of wavelength ≃0.01 Å. Together with the phase amplification technique , the vertivcal resolution is expected to be ≤0.01 Å in an ideal case.

Inelastic mean free path and phase-shift determinations in NiO, using EXELFS

1993 ◽  
Vol 3 (7) ◽  
pp. 1649-1659
Author(s):  
Mohammad A. Tafreshi ◽  
Stefan Csillag ◽  
Zou Wei Yuan ◽  
Christian Bohm ◽  
Elisabeth Lefèvre ◽  
...  
Keyword(s):  
Phase Shift ◽  
Free Path ◽  
Mean Free Path ◽  
Inelastic Mean Free Path

The present state of aspirin and clopidogrel resistance

2009 ◽  
Vol 29 (03) ◽  
pp. 285-290 ◽  
Author(s):  
K. E. Guyer
Keyword(s):  
Diagnostic Tests ◽  
Arterial Thrombosis ◽  
Cardiovascular Events ◽  
Treatment Success ◽  
Antiplatelet Agents ◽  
Antiplatelet Drug ◽  
Coronary Syndrome ◽  
Testing Method ◽  
Pharmacological Response ◽  
Platelet Physiology

SummaryAntiplatelet therapy has demonstrated significant clinical benefit in the treatment of acute coronary syndrome. However, as with any treatment strategy it has been unable to prevent all cardiovascular events. This is far from surprising when considering the complexity of arterial thrombosis and more specifically platelet physiology. This lack of treatment success has provoked the introduction of various diagnostic tests and testing platforms with the intent of guiding and optimizing clinical treatment. Such tests have resulted in the generation of clinical data that suggest suboptimal response to antiplatelet agents such as aspirin and clopidogrel.In the case of both aspirin and clopidogrel, this suboptimal response has been termed resistance. Drug resistance would imply a lack of pharmacological response that has not been specifically investigated in many of the clinical studies performed to date. Rather, the term resistance has been used to describe various facets of platelet activation and aggregation relative to the testing method. Many of these measured parameters are not addressed in the therapeutic intent of the antiplatelet drug in question.

Pengujian pada Aplikasi Penggajian Pegawai dengan menggunakan Metode Blackbox

2020 ◽  
Vol 5 (1) ◽  
pp. 61
Author(s):  
Vadlan Febrian ◽  
Muhamad Rizki Ramadhan ◽  
Muhammad Faisal ◽  
Aries Saifudin
Keyword(s):  
Data Entry ◽  
Black Box ◽  
Application Form ◽  
Value Analysis ◽  
Test Function ◽  
Testing Method ◽  
Black Box Testing ◽  
Sample Testing ◽  
Testing Techniques ◽  
Program Error

In this employee payroll application, if there is an error program there will be a loss for employees and the company. Losses for employees, if this application program error occurs then the salary reduction will experience delays due to the difficulty in the process of calculating employee salaries and employees will be late in receiving salaries. Losses for the company, if there is an error program in this application, the company will suffer losses if the employee wants a salary reduction quickly but the company cannot calculate quickly and accurately. In solving this problem, the authors use the black box testing method. Black box testing method is a test that sees the results of execution through test data and ensures the function of the software. Black box testing method has several testing techniques, namely Sample Testing, Boundary Value Analysis, Equivalence Partitions and others. From the testing techniques that have been mentioned, we use the Equivalence Partitions testing technique. Equivalence Partitions are tests that refer to data entry on the employee payroll application form, input will be tested and then put together based on the test function, both valid and invalid values. The expected results of this test are a payroll system for employees who are computerized, have standard rules in the process of developing the program so that it is easy to develop and maintain, and can minimize errors in processing salary calculations for employees.

Analisis Kesalahan Penggunaan Jinyici dalam Membuat Kalimat Bahasa Mandarin pada Mahasiswa Semester VI Angkatan 2014 Prodi Pendidikan Bahasa Mandarin Universitas Negeri Semarang

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Siti Soleha ◽  
Fansi Onita Santoso ◽  
Zaim Elmubarok
Keyword(s):  
Language Education ◽  
Quantitative Approach ◽  
Education Department ◽  
Testing Method ◽  
Mandarin Language

Penelitian ini bertujuan untuk mengetahui besar persentase kesalahan penggunaan (jìnyìcí), mengetahui kesalahan apa saja yang dilakukan mahasiswa, menentukan cara untuk membedakan penggunaan (jìnyìcí) dan merumuskan solusi yang dapat dilakukan untuk mengurangi kesalahan penggunaan (jìnyìcí) tersebut. Pendekatan penelitian yang dilakukan adalah deskriptif kuantitatif. Populasi dan sampel pada penelitian ini adalah mahasiswa semester VI angkatan 2014 Prodi Pendidikan Bahasa Mandarin Universitas Negeri Semarang sebanyak 25 mahasiswa. Teknik pengumpulan data dilakukan dengan metode dokumentasi dan metode tes. Berdasarkan hasil penelitian diketahui persentase kesalahan penggunaan (jìnyìcí) adalah sebesar 28,4%. Kesalahan tersebut tergolong pada tingkat rendah, namun ada beberapa kesalahan yang perlu lebih diperhatikan yaitu kesalahan dalam penggunaan fungsi tata bahasa dan kesalahan dalam memahami makna. Cara membedakan penggunaan (jìnyìcí) dapat dilakukan mahasiswa dengan mempelajari fungsi tata bahasa kosakata (jìnyìcí) dan memahami makna kosakata (jìnyìcí). Solusi yang dapat dilakukan adalah mempelajari fungsi tata bahasa kosakata (jìnyìcí) secara keseluruhan dengan benar, memahami makna kosakata (jìnyìcí) secara spesifik, dan memperbanyak latihan membuat kalimat menggunakan kosakata (jìnyìcí).This study aims to identify mistake percentage in using (jìnyìcí), identify what mistakes conducted by students, determine how to differentiate the usage of (jìnyìcí), and formulate solution to reduce mistake in using (jìnyìcí). This study uses descriptive-quantitative approach. There are 25 sixth students of Mandarin Language Education Department in Universitas Negeri Semarang as population and sample. In addition, data is collected by documentation and testing method. Based on the analysis, there is 28,4% of mistake in using (jìnyìcí). This finding is categorized as low. However, there are some mistakes that need to be noted. For instance, mistake in using grammar and interpreting meaning. Furthermore, (jìnyìcí) can be differentiate by studying grammar of (jìnyìcí) and understand the meaning of (jìnyìcí). Finally, it is recommended to study the grammar of (jìnyìcí), specifically understand the meaning of (jìnyìcí) and increase the exercise to make sentences using (jìnyìcí).

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