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Serial snapshot crystallography for materials science with SwissFEL
New opportunities for studying (sub)microcrystalline materials with small unit cells, both organic and inorganic, will open up when the X-ray free electron laser (XFEL) presently being constructed in Switzerland (SwissFEL) comes online in 2017. Our synchrotron-based experiments mimicking the 4%-energy-bandpass mode of the SwissFEL beam show that it will be possible to record a diffraction pattern of up to 10 randomly oriented crystals in a single snapshot, to index the resulting reflections, and to extract their intensities reliably. The crystals are destroyed with each XFEL pulse, but by combining snapshots from several sets of crystals, a complete set of data can be assembled, and crystal structures of materials that are difficult to analyze otherwise will become accessible. Even with a single shot, at least a partial analysis of the crystal structure will be possible, and with 10–50 femtosecond pulses, this offers tantalizing possibilities for time-resolved studies.
Towards time-resolved serial crystallography in a microfluidic device
Abstract not provided
A Framework for Compressing Unstructured Scientific Data via Serialization
We present a general framework for compressing unstructured scientific data with known local connectivity. A common application is simulation data defined on arbitrary finite element meshes. The framework employs a greedy topology preserving reordering of original nodes which allows for seamless integration into existing data processing pipelines. This reordering process depends solely on mesh connectivity and can be performed offline for optimal efficiency. However, the algorithm’s greedy nature also supports on-the-fly implementation. The proposed method is compatible with any compression algorithm that leverages spatial correlations within the data. The effectiveness of this approach is demonstrated on a large-scale real dataset using several compression methods, including MGARD, SZ, and ZFP.
Constrained Run-to-Run Control for Precision Serial Sectioning.
Abstract not provided.
Characterization and correction of serial deferred charge in LSST camera ITL CCDs
Not Available
SU-E-J-263: Repeatability of SUV and Texture Parameters in Serial PET Studies
Purpose: Standardized uptake values (SUV) are standard quantitative PET measures of FDG tumor uptake used,and are used as a tool to monitor response to therapy. Textural analysis is emerging as a new tool for assessing intratumoral heterogeneity which may allow better tissue characterization and improved prediction of response and survival rate.Understanding what variations may be expected in these parameters is key in order to make decisions based on how the change throughout the course of treatment. The aim of this study was to assess repeatability in SUV measures and texture parameters,and establish criteria that differentiate changes associated with treatment rather than statistical variability. Methods: Eighty patients,167 random lesions total,were scanned in a GE Discovery STE PET/CT Scanner. One field-of-view was chosen centered on the largest lesion observed in a clinical whole-body FDG PET.Immediately following,a gated 9 min scan was acquired in list mode,without changing the patient’s position between any scans. Data was replayed into 3 time bins,3 min each,in order to insure equivalent noise characteristics in each replicate.Data was reconstructed into 128×128×47 square matrices.One VOI was drawn over each lesion for each patient and used to segment all 3 replicates. The mean.max and peak SUV were calculated for each VOI and replicate. First-order textural features were also calculated (skewness and kurtosis). Repeatability was calculated as the average standard deviation over the mean for the 3 repeated measurements for each lesion. Results: The average percent error in the SUV max,peak and mean were 3.4%(0– 12.9%),1.9% (0–7.5%),2.8% (0–12.2%),respectively.For skewness and kurtosis they were 10.9% and 17.8%. Conclusion: We have shown that there is a large variation in %error in SUV measures across patients. SUVpeak is the least variable and kurtosis and skewness parameters are less reliable thatn SUVs.Higher order textures are be.
Robust error calibration for serial crystallography
See `README.md` for more information.
Robust error calibration for serial crystallography
See `README.md` for more information.
Compact tape-driven sample delivery system for serial femtosecond crystallography
Please check the README file for more details about the data
Conformational flexibility of soybean lipoxygenase is coupled to crystal solvent content in serial crystallography
XFEL diffraction frames from batch-crystallized Soybean Lipoxygenase-1 (SLO-1), revealing two crystal polymorphs arising from differential hydration during sample delivery
Conversion Helper 4 Easy Serialization Of Exi (ch4ese)
CH4ESE is an EXI conversion tool developed in Python3 that utilizes the open-source EXIficient implementation of the W3C EXI format specification. CH4ESE can be used to translate to and from EXI format using the command line with input data or using the web server for live-translation.
Kinematic Design of Serial Link Manipulators From Task Specifications
The Reconfigurable Modular Manipulator System (RMMS) consists of modular links and joints that can be assembled into many manipulator configurations. This capability allows the RMMS to be rapidly reconfigured to custom tailor it to specific tasks. An important issue related to the RMMS is the determination of the optimal manipulator configuration for a specific task. This article addresses the problem of mapping kinematic task specifications into a kinematic manipulator configuration. For the design of two-degrees-of-freedom (2- DOF) planar manipulators, an analytical solution is derived. Because analytical solutions become impractical for problems with more than two design parameters, we have also developed a numerical approach for the design of 6-DOF manipulators. The numerical procedure determines the Denavit-Hartenberg (D-H) parameters of a nonredundant manipulator with joint limits that can reach a set of specified positions/orientations in an environment that may include parallelepiped-shaped obstacles. Finally, this approach is demonstrated with a three- dimensional example for a 6-DOF manipulator.
Changes in trachoma indicators in Kiribati with two rounds of azithromycin mass drug administration, measured in serial population-based surveys
Baseline mapping in the two major population centers of Kiribati showed that trachoma was a public health problem in need of programmatic interventions. After conducting two annual rounds of antibiotic mass drug administration (MDA), Kiribati undertook trachoma impact surveys in 2019, using standardized two-stage cluster surveys in the evaluation units of Kiritimati Island and Tarawa. In Kiritimati, 516 households were visited and in Tarawa, 772 households were visited. Nearly all households had a drinking water source and access to an improved latrine. The prevalence of trachomatous trichiasis remained above the elimination threshold (0.2% in ≥15-year-olds) and was virtually unchanged from baseline. The prevalence of trachomatous inflammation—follicular (TF) in 1–9-year-olds decreased by approximately 40% from baseline in both evaluation units but remained above the 5% TF prevalence threshold for stopping MDA. TF prevalence at impact survey was 11.5% in Kiritimati and 17.9% in Tarawa. Infection prevalence in 1–9-year-olds by PCR was 0.96% in Kiritimati and 3.3% in Tarawa. Using a multiplex bead assay to measure antibodies to the C. trachomatis antigen Pgp3, seroprevalence in 1–9-year-olds was 30.2% in Kiritimati and 31.4% in Tarawa. The seroconversion rate, in seroconversion events/100 children/year, was 9.0 in Kiritimati and 9.2 in Tarawa. Seroprevalence and seroconversion rates were both assessed by four different assays, with strong agreement between tests. These results show that, despite decreases in indicators associated with infection at impact survey, trachoma remains a public health problem in Kiribati, and provide additional information about changes in serological indicators after MDA.
Validation and Verification of the Correct Operation of the Savannah River National Laboratories, Model SRNL-Rev. 2, Serial # SRNL-003 Coulometer.
In August of 2011, C-AAC successfully installed a new coulometer. This system was only the third ever built of a newly redesigned system that SRNL had completed. The other two new systems reside at the IAEA in Vienna and at SRNL in South Carolina. The new system will replace an old PAR173 system that had been the workhorse of the Plutonium Assay team since the early 1970s. This 40+ year old system was not computer compatible and no longer had available spare parts. Upon the request of the IAEA and C-AAC personnel, the SRNL team undertook a project to modernize their systems and completely revamped the electronics and data acquisition system of their coulometry models (designed and built in the early 1990’s) by combining all electronics on a single, multilayer printed circuit board with individual isolated ground and power planes.
Acceptance Test Report IdentiFinder 2 Serial Number 910532-78 (14 May 2014)
This report documents the initial testing of the subject IdentiFinder 2. The testing was performed by Philip Hypes, Scientist 3, at technical area 35 of Los Alamos National Laboratory on 14 May 2014. It appeared that these tests constituted the first use of the instrument, as the software asked for verification of the date/time immediately after the instrument was turned on. Except for the final self-calibration (noted below), all of the testing was performed with the instrument attached to AC power, as the battery was not charged.
Acceptance Test Report IdentiFinder 2 Serial Number 910532-77 (14 May 2014)
This report documents the initial testing of the subject IdentiFinder 2. The testing was performed by Philip Hypes, Scientist 3, at technical area 35 of Los Alamos National Laboratory on 14 May 2014. It appeared that these tests constituted the first use of the instrument, as the software asked for verification of the date/time immediately after the instrument was turned on. Except for the final self-calibration (noted below), all of the testing was performed with the instrument attached to AC power, as the battery was not charged.