The Solubility of Potassium Permanganate.

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Distributed Acoustic Sensing of Seismic Properties in a Borehole Drilled on a Fast‐Flowing Greenlandic Outlet Glacier

Abstract Distributed Acoustic Sensing (DAS) is a new technology in which seismic energy is detected, at high spatial and temporal resolution, using the propagation of laser pulses in a fiber‐optic cable. We show analyses from the first glaciological borehole DAS deployment to measure the englacial and subglacial seismic properties of Store Glacier, a fast‐flowing outlet of the Greenland Ice Sheet. We record compressional and shear waves in 1,043 m‐deep vertical seismic profiles, sampled at 10 m vertical resolution, and detect a transition from isotropic to anisotropic ice at 84% of ice thickness, consistent with the Holocene‐Wisconsin transition. We identify subglacial reflections originating from the base of a 20 m‐thick layer of consolidated sediment and, from attenuation measurements, interpret temperate ice in the lowermost 100 m of the glacier. Our findings highlight the promising potential of DAS technology to constrain the seismic properties of glaciers and ice sheets. Plain Language Summary Distributed Acoustic Sensing (DAS) is a new technology for seismic surveying in which the transmission of light through fiber‐optic cables is used to record seismic energy, with unprecedented spatial resolution compared to traditional techniques. Our paper presents data from the first borehole‐glaciological deployment of DAS, in which fiber‐optic cable was installed in a 1,043 m‐deep vertical borehole on Store Glacier, a fast‐flowing outlet of the Greenland Ice Sheet. The detailed seismic anatomy of the glacier that our survey provides—an independent measurement of the seismic response every 10 m—gives new insights about its internal flow regime and temperature and even allows us to detect layers of sediment underlying it. We predict that DAS surveying will play an increasingly large role in future glaciological investigations as the recognition of its promising potential grows

Flexure of cranial sutures

Beam samples containing cranial sutures were prepared from embalmed and unembalmed cranial bone and were tested to determine their flexural stiffness and strength. With the aid of layered beam theory, the flexural stiffnesses of beams containing cranial sutures were compared to hypothetical layered cranial bone beams which did not contain sutures. The bending stiffnesses and strengths of cranial sutures were found to be generally the same as comparable layered cranial bone structures. Embalmed samples were slightly stiffer and stronger in bending than unembalmed samples.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/33515/1/0000013.pd

Entry, Growth, and Survival in the Green Industry

Economists are interested in the factors that induce firm entry, lead to growth, and help firms succeed in various markets. Such information can be helpful to policymakers but, unfortunately, such patterns have not been considered for “green industries.” This paper takes advantage of a recent definition of green industries proposed by the Bureau of Labor Statistics to investigate patterns characterizing these industries within the State of Texas. Leveraging the differences between the five sub-categories within the BLS definition, this study attempts to identify the comparative advantage each county has within the green economy

Associations of functional connectivity and walking performance in multiple sclerosis

Background Persons with multiple sclerosis (MS) often demonstrate impaired walking performance, and neuroimaging methods such as resting state functional connectivity (RSFC) may support a link between central nervous system damage and disruptions in walking. Objectives This study examined associations between RSFC in cortical networks and walking performance in persons with MS. Methods 29 persons with MS underwent 3-T brain magnetic resonance imaging (MRI) and we computed RSFC among 68 Gy matter regions of interest in the brain. Participants completed the Timed 25-foot Walk as a measure of walking performance. We examined associations using partial Pearson product-moment correlation analyses (r), controlling for age. Results There were eight cortical brain regions that were significantly associated with the T25FW, including the left parahippocampal gyrus and transverse temporal gyrus, and the right fusiform gyrus, inferior temporal gyrus, lingual gyrus, pericalcarine cortex, superior temporal gyrus, and transverse temporal gyrus. Conclusions We provide novel evidence that RSFC can be a valuable tool to monitor the motor and non-motor networks impacted in MS that relate to declines in motor impairment. RSFC may identify critical nodes involved in a range of motor tasks such as walking that can be more sensitive to disruption by MS

Entry, growth, and survival in the green industry

Economists have, for some time, studied the factors that induce firm entry, lead to growth, and help firms succeed in various markets. Unfortunately, such patterns have not been considered for the so-called "green industries." Although policymakers might like to stimulate development of the green sectors in encouraging sustainable growth, one difficulty has been defining exactly what constitutes the green economy. We employ a recent, narrow definition proposed by the Bureau of Labor Statistics to investigate and identify important factors for the green industries within the State of Texas. We find some differences between the green industries and all other industries, but these effects are often small relative to other major explanatory factors like agglomeration. The definition also partitions the green industry into five subcategories and we leverage this feature to study the importance of these factors for the intra-green industries and to identify the comparative advantage each county has within the green economy

Entry, growth, and survival in the green industry

Economists have, for some time, studied the factors that induce firm entry, lead to growth, and help firms succeed in various markets. Unfortunately, such patterns have not been considered for the so-called "green industries." Although policymakers might like to stimulate development of the green sectors in encouraging sustainable growth, one difficulty has been defining exactly what constitutes the green economy. We employ a recent, narrow definition proposed by the Bureau of Labor Statistics to investigate and identify important factors for the green industries within the State of Texas. We find some differences between the green industries and all other industries, but these effects are often small relative to other major explanatory factors like agglomeration. The definition also partitions the green industry into five subcategories and we leverage this feature to study the importance of these factors for the intra-green industries and to identify the comparative advantage each county has within the green economy