NSTL国家科技图书文献中心

1. New Standard on Macro-Particles and Visible Particles in Cleanrooms-ISO 14644-17, Particle deposition rate applications NSTL国家科技图书文献中心

Koos Agricola - 《Journal of the IEST》 - 2023,66(1) - 101～105 - 共5页

摘要：ISO TC 209 has developed a series of standards | for cleanrooms and associated controlled | environments. To date, 19 ISO 14644 and 14698 standards have | been published. With respect to particles, the focus | has been on airborne particles up to 5 micrometers

关键词： ISO | TC 209 | 14644 | cleanroom | particle deposition rate | contamination control

2. Progression of Cleanroom Standards Development, 1959-1970s NSTL国家科技图书文献中心

Clifford “Bud” Frith - 《Journal of the IEST》 - 2023,66(1) - 81～100 - 共20页

摘要：It is my privilege to recognize all the | thousands of experienced people who, during the past 60 | years, developed the technical documents, trained new | generations of specialists, and provided the best solutions | for environmentally-controlled facilities and

关键词： white room | clean room | cleanroom | environmentally controlled spaces | processes | standards | history

3. Initial Development of a High-Power Solid-State Solar Simulator NSTL国家科技图书文献中心

Wyatt Felt | Kevin Marriott ... - 《Journal of the IEST》 - 2023,66(1) - 19～38 - 共20页

摘要：Our team has developed and tested a solid | -state solar simulating lamp for use with space | simulation vacuum chambers. Unlike traditional lamps, our | system uses solid-state light-emitting diodes (LEDs) to | generate the light. The emission wavelengths of the LEDs

关键词： Environmental testing | orbital environment | solar simulation | thermal management | LED arrays | ultraviolet light

4. Evaluation of Copper and Gold Wire Bonds in PEM Devices NSTL国家科技图书文献中心

Brian Myer | Eric Gallardo ... - 《Journal of the IEST》 - 2023,66(1) - 71～80 - 共10页

摘要：The shift from gold to copper wire bonds used | in plastic encapsulated microcircuits (PEMs) has | been gradual for the last few years. Many agencies | and critics question the long-term robustness and | reliability of copper wire bonds; however, PEM manufacturers

关键词： Copper | gold | wire bond | PEM reliability | decapsulation | environmental stress | wire pull

5. A New Method Using Pseudovelocity-Based Fatigue Analysis to Determine the Effectiveness of Acoustic Fields Used for Acoustic Testing NSTL国家科技图书文献中心

Marcos A. Underwood | Marc D. Lamparelli - 《Journal of the IEST》 - 2023,66(1) - 39～70 - 共32页

摘要：This paper summarizes results from the use of | advanced adaptive multiple-input, multiple-output(i.e | ., MIMO) control for direct field acoustic testing to | excite an aluminum-honeycombed 1.22 m x 2.44 m(4 ft x 8 | ft) test panel with MSI-DFAT’s near-diffuse

关键词： 1/3 octave | SPL spectrum | OASPL | pseudovelocity | MIMO control | near-diffuse acoustic field

6. Influence of Windowing and Overlapping on Kurtosis Value of Non-Gaussian IFFT Signals Generated by Shaker Controllers NSTL国家科技图书文献中心

Alexander Steinwolf - 《Journal of the IEST》 - 2023,66(1) - 1～18 - 共18页

摘要：This paper concerns random vibration testing | on electrodynamic shakers, which is specified | byprescribing the power spectral density (PSD) of the | generated excitation and its kurtosis if the latterneeds | to be higher or lower than that provided by the PSD

关键词： kurtosis | windowing | overlapping | IFFT signal generation | shaker testing

7. Comparisons between Spectral Density Matrix Based Six-Degree-of-Freedom and Traditional One-Degree-of-Freedom Vibration Specification Development for a Common Large Cargo Truck Bed EI 工程索引 NSTL国家科技图书文献中心

Michael T. Hale | William Barber ... - 《Journal of the IEST》 - 2022,65(1) - 1～20 - 共20页

摘要：As multiple degree-of-freedom excitation | systems continue to evolve and become standard hardware | in many dynamic test facilities, there continues to | be a lag in the development of associated spectral | density based vibration specifications. The following

关键词： vibration specification development | acceleration transformation | coordinate frame | spectral density matrix | motion space | measurement space | 6-DOF | MDOF | SDOF

8. Considerations Toward Optimal, Meaningful Sample Collection and Data Evaluation in Pharmaceutical Environmental Monitoring Programs EI 工程索引 NSTL国家科技图书文献中心

Omar Cruz Martinez - 《Journal of the IEST》 - 2022,65(1) - 51～63 - 共13页

摘要：This Tech Talk article presents real-life | environmental monitoring (EM) scenarios evaluated as business | cases occurring in the context of a typical EM program | lifecycle span. In doing so, the intention is to benefit | the many roles responsible for the design

关键词： Environmental monitoring | environmental monitoring program | cleanrooms | microbiology

9. Designing Electronic Card Packages Against Shipping Shock EI 工程索引 SCOPUS Scopus数据库 NSTL国家科技图书文献中心

Christine Taylor | Budy Notohardjono ... - 《Journal of the IEST》 - 2021,64(1) - 42～49 - 共8页

摘要：In optimizing packaging design, the product’s | fragility is qualified by a protype undergoing | quantitative and qualitative tests that rely heavily on past | knowledge and experiments. By the addition of finite | element analysis (FEA), the product’s fragility can be

关键词： Packaging | drop | shipping | testing | foam | analysis

10. Modernization of NASA Johnson Space Center’s Chamber A to support Cryogenic Vacuum Optical Testing of the James Webb Space Telescope (JWST) EI 工程索引 SCOPUS Scopus数据库 NSTL国家科技图书文献中心

Mary Cerimele | Jonathan Homan ... - 《Journal of the IEST》 - 2021,64(1) - 30～41 - 共12页

摘要：NASA is the mission lead for the James Webb | Space Telescope (JWST), the next of the “Great | Observatories,” scheduled for launch in 2021. NASA is directly | responsible for the integration and test (I&T) program that | culminated in an end-to-end cryo vacuum optical test of the