Fast processing of underwater polarization imagingbased on optical correlation

Background: One of the pivotal challenges in nowadays genomic research domain is the fast processing of voluminous data such as the ones engendered by high-throughput Next-Generation Sequencing technologies. On the other hand, BLAST (Basic Local Alignment Search Tool), a longestablished and renowned tool in Bioinformatics, has shown to be incredibly slow in this regard. Objective: To improve the performance of BLAST in the processing of voluminous data, we have applied a novel memory-aware technique to BLAST for faster parallel processing of voluminous data. Method: We have used a master-worker model for the processing of voluminous data alongside a memory-aware technique in which the master partitions the whole data in equal chunks, one chunk for each worker, and consequently each worker further splits and formats its allocated data chunk according to the size of its memory. Each worker searches every split data one-by-one through a list of queries. Results: We have chosen a list of queries with different lengths to run insensitive searches in a huge database called UniProtKB/TrEMBL. Our experiments show 20 percent improvement in performance when workers used our proposed memory-aware technique compared to when they were not memory aware. Comparatively, experiments show even higher performance improvement, approximately 50 percent, when we applied our memory-aware technique to mpiBLAST. Conclusion: We have shown that memory-awareness in formatting bulky database, when running BLAST, can improve performance significantly, while preventing unexpected crashes in low-memory environments. Even though distributed computing attempts to mitigate search time by partitioning and distributing database portions, our memory-aware technique alleviates negative effects of page-faults on performance.

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Optical correlation measurement of switching transients in high-speed semiconductor lasers

Electronics Letters ◽

10.1049/el:19860269 ◽

1986 ◽

Vol 22 (7) ◽

pp. 396 ◽

Cited By ~ 13

Author(s):

J.M. Wiesenfeld ◽

R.S. Tucker ◽

P.M. Downey ◽

J.E. Bowers

Keyword(s):

Semiconductor Lasers ◽

High Speed ◽

Correlation Measurement ◽

Optical Correlation

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Enhancement of Strain/Temperature Measurement Range and Spatial Resolution in Brillouin Optical Correlation Domain Analysis Based on Convexity Extraction Algorithm

IEEE Access ◽

10.1109/access.2019.2901799 ◽

2019 ◽

Vol 7 ◽

pp. 32128-32136 ◽

Cited By ~ 1

Author(s):

Bin Wang ◽

Xinyu Fan ◽

Yuanxiu Fu ◽

Zuyuan He

Keyword(s):

Temperature Measurement ◽

Spatial Resolution ◽

Domain Analysis ◽

Measurement Range ◽

Optical Correlation ◽

Extraction Algorithm

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Optical correlation devices for measuring randomly phased objects

Optical Engineering ◽

10.1117/12.142946 ◽

1993 ◽

Vol 32 (12) ◽

pp. 3235 ◽

Cited By ~ 4

Author(s):

Oleg V. Angelsky

Keyword(s):

Optical Correlation

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Exceptional Mechanical Properties and Heat Resistance of Photocurable Bismaleimide Ink for 3D Printing

Materials ◽

10.3390/ma14071708 ◽

2021 ◽

Vol 14 (7) ◽

pp. 1708

Author(s):

Wenqiang Hua ◽

Qilang Lin ◽

Bo Qu ◽

Yanyu Zheng ◽

Xiaoying Liu ◽

...

Keyword(s):

Mechanical Properties ◽

3D Printing ◽

Heat Resistance ◽

Three Dimensional ◽

Mechanical And Thermal Properties ◽

Amino Group ◽

Building Models ◽

Fast Processing ◽

Forming Precision ◽

Complex Structural

Photosensitive resins used in three-dimensional (3D) printing are characterized by high forming precision and fast processing speed; however, they often possess poor mechanical properties and heat resistance. In this study, we report a photocurable bismaleimide ink with excellent comprehensive performance for stereolithography (SLA) 3D printing. First, the main chain of bismaleimide with an amino group (BDM) was synthesized, and then, the glycidyl methacrylate was grafted to the amino group to obtain the bismaleimide oligomer with an unsaturated double bond. The oligomers were combined with reaction diluents and photo-initiators to form photocurable inks that can be used for SLA 3D printing. The viscosity and curing behavior of the inks were studied, and the mechanical properties and heat resistance were tested. The tensile strength of 3D-printed samples based on BDM inks could reach 72.6 MPa (166% of that of commercial inks), glass transition temperature could reach 155 °C (205% of that of commercial inks), and energy storage modulus was 3625 MPa at 35 °C (327% of that of commercial inks). The maximum values of T-5%, T-50%, and Tmax of the 3D samples printed by BDM inks reached 351.5, 449.6, and 451.9 °C, respectively. These photocured BDM inks can be used to produce complex structural components and models with excellent mechanical and thermal properties, such as car parts, building models, and pipes.

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