The representation of navigable space, consisting of multiple interconnected spaces, yet is not well understood. We examined different levels of integration within memory (local, regional, global). Participants learned two distinctive regions of a virtual environment that converged at a common transition-point. Subsequently, we tested their memory with a pointing task, varying body alignment du...

BACKGROUND The objective was to determine the influence of gestational age, maternal, and neonatal variables on reference intervals for cord blood bone minerals (calcium, phosphate, magnesium) and related laboratory tests (alkaline phosphatase, and albumin-adjusted calcium), and to develop gestational age specific reference intervals based on infants without influential pathological conditions....

In addition to reference measurement procedures and reference materials, reference or calibration laboratories play an integral role in the implementation of measurement traceability in routine laboratories. They provide results of measurements using higher-order methods, e.g. isotope dilution mass spectrometry and may assign values to materials to be used for external quality assessment progra...

The biochemical changes which have been reported during and after hypothermia for cardiac surgery, and on which the literature is now considerable, are similar in man to those already found in animals. However, there are comparatively few references in the literature to investigations carried out in neurosurgical units, those of Gunton, Scott, Lougheed, and Botterell (1956) and Gray (1957) bein...

We describe the results of a comparison of reference standards between the National Institute of Standards and Technology (NIST-USA) and Korea Research Institute of Standards and Science (KRISS-R.O. Korea) for optical fiber-based power measurements at wavelengths of 1302 nm and 1546 nm. We compare the laboratories' reference standards by means of a temperature-controlled optical trap detector. ...

A pathologist may practice telepathology in another room from the original slide using the hospital intranet, he/she may practice it if a CD-ROM is reviewed with a "virtual histologic image" or digital slide. As pathology becomes increasingly subspecialized, and pathologists are progressively more engaged in practices situations where they may not be in a centralized laboratory location, use of...

In this review we discuss the progress of the past decade in testing for a possible temporal variation of the fine structure constant α. Advances in atomic sample preparation, laser spectroscopy and optical frequency measurements led to rapid reduction of measurement uncertainties. Eventually laboratory tests became the most sensitive tool to detect a possible variation of α at the present epoc...

The turbidimetric methods in routine use at two laboratories for the microbiological assay of vitamin B12 have been compared. Attempts were made to standardize some major parts of the method, i.e., assay design, test strain (Lactobacillus leichmannii), test medium, and reference standard. The laboratories used different approaches to achieve efficient assay procedures. During a 6-year period fo...

ORGANIC ANALYTICAL REAGENTS By JOHN H. YOE, Professor of Chemistry, University of Virginia, and LANDON A. BARVER, Director of Research, American Viscose Corporation. A comprehensive treatise on organic analytical reagents. It represents probably the first attempt to collect in one volume the data hitherto scattered throughout the literature. A glossary of reagents is included, and a bibliograph...