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"Butler, William"
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The Irish amateur military tradition in the British Army, 1854-1992
Examines the framework in which Irish auxiliary forces, part-time soldiers of the British Army, have existed alongside their regular army counterparts and how they have interacted with wider society.
Book
Remembered reward locations restructure entorhinal spatial maps
Ethologically relevant navigational strategies often incorporate remembered reward locations. Although neurons in the medial entorhinal cortex provide a maplike representation of the external spatial world, whether this map integrates information regarding learned reward locations remains unknown. We compared entorhinal coding in rats during a free-foraging task and a spatial memory task. Entorhinal spatial maps restructured to incorporate a learned reward location, which in turn improved positional decoding near this location. This finding indicates that different navigational strategies drive the emergence of discrete entorhinal maps of space and points to a role for entorhinal codes in a diverse range of navigational behaviors.
Journal Article
Laminectomy plus Fusion versus Laminectomy Alone for Lumbar Spondylolisthesis
Among patients with spondylolisthesis and lumbar spinal stenosis, laminectomy with fusion was associated with modestly greater improvement in physical health–related quality of life than laminectomy alone but not with significantly greater reduction in disability related to back pain.
The increased use of the lumbar spinal fusion procedure in the United States, along with the wide variation in practice, is attracting interest from multiple stakeholders, including patients, physicians, payers, and policymakers. In a report published in 2014, spinal fusion (465,000 hospital-based procedures in 2011) accounted for the highest aggregate hospital costs ($12.8 billion in 2011) of any surgical procedure performed in U.S. hospitals.
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The randomized, controlled Spine Patient Outcomes Research Trial (SPORT) showed that surgery was superior to nonoperative care for the management of lumbar degenerative spondylolisthesis.
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In SPORT, most patients in the surgical group were treated by means . . .
Journal Article
Wavelet brain angiography suggests arteriovenous pulse wave phase locking
When a stroke volume of arterial blood arrives to the brain, the total blood volume in the bony cranium must remain constant as the proportions of arterial and venous blood vary, and by the end of the cardiac cycle an equivalent volume of venous blood must have been ejected. I hypothesize the brain to support this process by an extraluminally mediated exchange of information between its arterial and venous circulations. To test this I introduce wavelet angiography methods to resolve single moving vascular pulse waves (PWs) in the brain while simultaneously measuring brain pulse motion. The wavelet methods require angiographic data acquired at significantly faster rate than cardiac frequency. I obtained these data in humans from brain surface optical angiograms at craniotomy and in piglets from ultrasound angiograms via cranial window. I exploit angiographic time of flight to resolve arterial from venous circulation. Initial wavelet reconstruction proved unsatisfactory because of angiographic motion alias from brain pulse motion. Testing with numerically simulated cerebral angiograms enabled the development of a vascular PW cine imaging method based on cross-correlated wavelets of mixed high frequency and high temporal resolution respectively to attenuate frequency and motion alias. Applied to the human and piglet data, the method resolves individual arterial and venous PWs and finds them to be phase locked each with separate phase relations to brain pulse motion. This is consistent with arterial and venous PW coordination mediated by pulse motion and points to a testable hypothesis of a function of cerebrospinal fluid in the ventricles of the brain.
Journal Article
At the hawk's well ; and, The cat and the moon : manuscript materials
\"Both At the Hawk's Well (1917) and The Cat and the Moon (1924) dramatize their characters' journeys of the soul to sacred wells. In At the Hawk's Well, the characters believe the miraculous well is a source of eternal life, but neither benefits from it. The play portrays the failure of its hero's quest in the Irish heroic age and makes clear W. B. Yeats's own preoccupation with aging, marriage, and perhaps waning inspiration. In The Cat and the Moon, the characters again put their faith in a sacred well and the saint who guards it, and both are rewarded with miracles: it is a parodic repetition of the earlier play but with a happy ending. The characters are satirical portraits of actual people, yet they are subject to the lunar cycles of personal and historical change.\" \"The Cornell Yeats edition of these two plays presents photographs and transcriptions of the typescripts that the author prepared and revised, along with images of Lennox Robinson's musical settings for the songs in the 1931 performances of The Cat and the Moon. Andrew Parkin prefaces the texts with a census of manuscripts, an introduction discussing the content of the plays, the history of their composition and performance, and a chronology of their composition. In both plays, Yeats drew on the conventions of Noh theater, and he suggested that they be performed in a single evening (along with The Dreaming of the Bones).\"--BOOK JACKET.
Book
Collaborative Implementation for Ecological Restoration on US Public Lands: Implications for Legal Context, Accountability, and Adaptive Management
The Collaborative Forest Landscape Restoration Program (CFLRP), established in 2009, encourages collaborative landscape scale ecosystem restoration efforts on United States Forest Service (USFS) lands. Although the USFS employees have experience engaging in collaborative planning, CFLRP requires collaboration in implementation, a domain where little prior experience can be drawn on for guidance. The purpose of this research is to identify the ways in which CFLRP’s collaborative participants and agency personnel conceptualize how stakeholders can contribute to implementation on landscape scale restoration projects, and to build theory on dynamics of collaborative implementation in environmental management. This research uses a grounded theory methodology to explore collaborative implementation from the perspectives and experiences of participants in landscapes selected as part of the CFLRP in 2010. Interviewees characterized collaborative implementation as encompassing three different types of activities: prioritization, enhancing treatments, and multiparty monitoring. The paper describes examples of activities in each of these categories and then identifies ways in which collaborative implementation in the context of CFLRP (1) is both hindered and enabled by overlapping legal mandates about agency collaboration, (2) creates opportunities for expanded accountability through informal and relational means, and, (3) creates feedback loops at multiple temporal and spatial scales through which monitoring information, prioritization, and implementation actions shape restoration work both within and across projects throughout the landscape creating more robust opportunities for adaptive management.
Journal Article
CSF in the ventricles of the brain behaves as a relay medium for arteriovenous pulse wave phase coupling
The ventricles of the brain remain perhaps the largest anatomic structure in the human body without established primary purpose, even though their existence has been known at least since described by Aristotle. We hypothesize that the ventricles help match a stroke volume of arterial blood that arrives into the rigid cranium with an equivalent volume of ejected venous blood by spatially configuring cerebrospinal fluid (CSF) to act as a low viscosity relay medium for arteriovenous pulse wave (PW) phase coupling. We probe the hypothesis by comparing the spatiotemporal behavior of vascular PW about the ventricular surfaces in piglets to internal observations of ventricle wall motions and adjacent CSF pressure variations in humans. With wavelet brain angiography data obtained from piglets, we map the travel relative to brain pulse motion of arterial and venous PWs over the ventricle surfaces. We find that arterial PWs differ in CF phase from venous PWs over the surfaces of the ventricles consistent with arteriovenous PW phase coupling. We find a spatiotemporal difference in vascular PW phase between the ventral and dorsal ventricular surfaces, with the PWs arriving slightly sooner to the ventral surfaces. In humans undergoing neuroendoscopic surgery for hydrocephalus, we measure directly ventricle wall motions and the adjacent internal CSF pressure variations. We find that CSF pressure peaks slightly earlier in the ventral Third Ventricle than the dorsal Lateral Ventricle. When matched anatomically, the peri-ventricular vascular PW phase distribution in piglets complements the endo-ventricular CSF PW phase distribution in humans. This is consistent with a role for the ventricles in arteriovenous PW coupling and may add a framework for understanding hydrocephalus and other disturbances of intracranial pressure.
Journal Article