Exploring the Utility of Developer Exhaust.

Using machine learning to analyze data often results in - code, logs, or metadata that do not define the learning algorithm but are byproducts of the data analytics pipeline. We study how the rich information present in developer exhaust can be used to approximately solve otherwise complex tasks. Specifically, we focus on using log data associated with training deep learning models to perform model search by performance metrics for untrained models.

A Novel Mini-invasive Approach to the Treatment of Neuropathic Pain: The PENS Study.

Background: Peripheral neuromodulation is often used as chronic neuropathic pain treatment. Percutaneous electrical nerve stimulation (PENS) is generally utilized with several probes at the same time and repeated treatments.

Objectives: Evaluate the short- and long-term efficacy of a single probe and single shot PENS approach.

Guidelines for capillary extraction-capillary gas chromatography: preparation of extractors and analysis of aromatic compounds in water.

The benzene, toluene, ethylbenzene and xylenes system (BTEX) in clean water is studied to verify the performance of capillary extraction as an extraction-preconcentration technique well hyphenated with GC. The approach uses pieces of coated capillaries usually 5-30 cm long, trimmed from customary high-resolution GC columns but carrying glass press-fits at their ends. The preparation of these 'capillary extractors' is explained, and their performance is discussed providing guidelines for use.

In-tube solid-phase microextraction sampler for long-term storage.

Capillary extractors are proposed as samplers-preconcentrators to overcome losses of volatile organic compounds found using "classical" solid-phase microextraction fiber-holder samplers. A set of equal-size extractors was used to extract in-tube an aqueous solution of benzene, toluene, ethylbenzene and xylenes (BTEX) at 146 ppb. After storage for 6-30 days at 0-4 degrees C (or -15 degrees C) GC analyses were carried out to study BTEX recovery.

Capillary extractors for "negligible depletion" sampling of benzene, toluene, ethylbenzene and xylenes by in-tube solid-phase microextraction.

The suitability of "capillary extractors" is demonstrated for the "negligible depletion" extraction of benzene, toluene, ethylbenzene and xylenes in a clean-water matrix. Extraction set-up and major extractor parameters (length, internal diameter, and film thickness) are chosen to allow rugged analysis by GC with flame ionization detection. With the selected negligible extraction conditions, the efficiency for every consecutive extraction is about 2-3% of the dissolved amount.

Symmetrical (double-speed) static coating for high-resolution gas chromatography column preparation.

"Breakthrough" during static coating could be avoided using a new coating strategy: while filling the capillary support with coating solution, a short mercury plug was placed at the middle of the support length. Mercury was frozen by a cold source and vacuum was applied to both open ends. In this way static coating became symmetric and so evaporation rate was doubled, on a time base, and more than doubled on a coated length base.

New high-performance cryofocalizer injector for in-tube solid-phase microextraction and headspace capillary gas chromatographic applications.

The construction of a high-efficiency but cheap injector for volatile and very volatile compounds is shown. The device focuses the compounds in a fused-silica (FS) transfer capillary with the aid of liquid nitrogen. A 6.

Determination of siloxane-water partition coefficients by capillary extraction-high-resolution gas chromatography study of aromatic solvents.

Partition coefficients of benzene, toluene, ethylbenzene and xylenes (BTEX), between crosslinked polydimethylsiloxane and water, were determined at room temperature by capillary extraction (a form of in-tube solid-phase microextraction, SPME) coupled to open tubular gas chromatography (in-tube SPME-high-resolution GC). A series of 7-9 repetitive extractions, performed on a 1-ml volume of diluted aqueous BTEX sample by the double-syringe squeeze method, gave exponential regression curves which fit very well with those predicted by partition theory. From the equations of the curves of relative FID response vs.