Filters: Date: "2008-01-01" Collection: ir_uspace
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
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Gerig, Guido | A structural MRI study of human brain development from birth to two years | Brain development in the first 2 years after birth is extremely dynamic and likely plays an important role in neurodevelopmental disorders, including autism and schizophrenia. Knowledge regarding this period is currently quite limited. We studied structural brain development in healthy subjects from... | 2008-01-01 | |
| 2 |
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Simpson, Jamesina J. | ADE-FDTD scattered-field formulation for dispersive materials | This letter presents a scattered-field formulation for modeling dispersive media using the finite-difference time-domain (FDTD) method. Specifically, the auxiliary differential equation method is applied to Drude and Lorentz media for a scattered field FDTD model. The present technique can also be a... | 2008-01-01 | |
| 3 |
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Gerig, Guido | Assessment of reliability of multi-site neuroimaging via traveling phantom study | This paper describes a framework for quantitative analysis of neuroimaging data of traveling human phantoms used for cross-site validation. We focus on the analysis of magnetic resonance image data including intra- and intersite comparison. Locations and magnitude of geometric deformation is studied... | 2008-01-01 | |
| 4 |
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Gerig, Guido | Brain lesion segmentation through physical model estimation | Segmentations of brain lesions from Magnetic Resonance (MR) images is crucial for quantitative analysis of lesion populations in neuroimaging of neurological disorders. We propose a new method for segmenting lesions in brain MRI by inferring the underlying physical models for pathology. We use the r... | Magnetic resonance (MR) images; Neurological disorders; Diffusion tensor imaging (DTI). | 2008-01-01 |
| 5 |
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Miller, Jan D. | Chemical utilization of sequestered carbon dioxide as a booster of hydrogen economy | For many, hydrogen in a pure hydrogen economy would be like natural gas in today's energy economy. Unfortunately, hydrogen's physical properties are unsuited to the energy market's requirements in terms of packaging, storage, transfer, and delivery. In this paper, a hybrid energy economy that packag... | 2008-01-01 | |
| 6 |
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Harrison, Reid R. | Design of integrated circuits to observe brain activity | The ability to monitor the simultaneous electrical activity of multiple neurons in the brain enables a wide range of scientific and clinical endeavors. Recent efforts to merge miniature multielectrode neural recording arrays with integrated electronics have revealed significant circuit design chall... | Amplifiers; Analog integrated circuits; Biomedical signal processing; Low-power circuit design; Neural recording; Subthreshold circuit design; Neural signals; Brain activity | 2008-01-01 |
| 7 |
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Regehr, John | Edicts: implementing features with flexible binding times | In a software product line, the binding time of a feature is the time at which one decides to include or exclude a feature from a product. Typical binding site implementations are intended to support a single binding time only, e.g., compile time or run time. Sometimes, however, a product line must... | 2008-01-01 | |
| 8 |
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Gerig, Guido | Evaluation of brain MRI alignment with the Robust Hausdorff Distance Measures | We present a novel automated method for assessment of image alignment, applied to non-rigid registration of brain Magnetic Resonance Imaging data (MRI) for image-guided neurosurgery. We propose a number of robust modifications to the Hausdorff distance (HD) metric, and apply it to the edges recovere... | Magnetic resonance imaging (MRI) | 2008-01-01 |
| 9 |
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Gerig, Guido | Functional connectivity MR imaging reveals cortical functional connectivity in the developing brain | BACKGROUND AND PURPOSE: Unlike conventional functional MR imaging where external sensory/cognitive paradigms are needed to specifically activate different regions of the brain, resting functional connectivity MR imaging acquires images in the absence of cognitive demands (a resting condition) and de... | 2008-01-01 | |
| 10 |
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Khan, Faisal Habib | Generating isolated outputs in a multilevel modular capacitor clamped DC-DC converter (MMCCC) for hybrid electric and fuel cell vehicles | This paper presents a new technique to obtain isolated dc voltage outputs from a capacitor clamped dc-dc converter. The multilevel modular capacitor clamped converter (MMCCC) has several key features that make it possible to generate ac outputs (10 kHz) from a dc-dc converter circuit. Using those h... | 2008-01-01 | |
| 11 |
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Simpson, Jamesina J. | Global FDTD maxwell's equations modeling of elctromagnetic propagation from currents in the lithosphere | Electromagnetic wave propagation from electric currents within the Earth's crust is investigated using a three-dimensional finite-difference time-domain (FDTD) full-vector Maxwell's equations model of the global Earth-ionosphere cavity. The FDTD model employed extends from -100 km below sea level to... | 2008-01-01 | |
| 12 |
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Gerig, Guido | Group statistics of DTI fiber bundles using spatial functions of tensor measures | We present a framework for hypothesis testing of differences between groups of DTI ber tracts. An anatomical, tract-oriented coordinate system provides a basis for estimating the distribution of diffusion properties. The parametrization of sampled, smooth functions is normalized across a population ... | 2008-01-01 | |
| 13 |
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Couldwell, William T. | Hemorrhagic and nonhemorrhagic Rathke cleft cysts mimicking pituitary apoplexy | Object. Rathke cleft cysts (RCCs) are infrequently symptomatic, and apoplexy is one of the most unusual presentations. Only a few cases of apoplexy associated with RCCs have been reported, and their clinical, imaging, surgical, and pathological features are poorly understood. In the cases that have ... | 2008-01-01 | |
| 14 |
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Utz, Rebecca L.; Lund, Dale A.; Caserta, Michael | Humor, laughter, and happiness in the daily lives of recently bereaved spouses | The positive psychology movement has created more interest in examining the potential value of experiencing positive emotions (e.g., humor, laughter, and happiness) during the course of bereavement. This study of 292 recently widowed (5-24 weeks) men (39%) and women (61%) age 50 and over examined bo... | bereavement adjustment | 2008-01-01 |
| 15 |
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Harrison, Reid R. | Influence of system integration and packaging for a wireless neural interface on its wireless powering performance | In an integrated wireless neural interface based on the Utah electrode array, the implanted electronics is supplied with power through inductive coupling between two coils. This inductive power link would be affected by conductive and dielectric media surrounding the implant coil. In this study, th... | Implant coil; Wireless; Integrated Neural Interface; INI3; Utah Electrode Array | 2008-01-01 |
| 16 |
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Sekercioglu, Cagan | Landscape constraints on functional diversity of birds and insects in tropical agroecosystems | In this paper, we analyze databases on bird and insects to assess patterns of functional diversity in human-dominated landscapes in the tropics. Perspective from developed landscapes is essential for understanding remnant natural ecosystems, because most species experience their surroundings at spat... | 2008-01-01 | |
| 17 |
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Sekercioglu, Cagan | Measuring the meltdown: drivers of global amphibian extinction and decline | Habitat loss, climate change, over-exploitation, disease and other factors have been hypothesised in the global decline of amphibian biodiversity. However, the relative importance of and synergies among different drivers are still poorly understood. We present the largest global analysis of roughly ... | 2008-01-01 | |
| 18 |
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Couldwell, William T. | Metabolic syndrome: what neurosurgeons should know | The term metabolic syndrome, first introduced in 1988, has evolved in concept since that time. While the strict definition is subject to ongoing debate, the syndrome generally involves glucose intolerance, obesity, dyslipidemia and high blood pressure, which increase the risk of developing cardiovas... | 2008-01-01 | |
| 19 |
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Agarwal, Nivedita | Microstructural thalamic changes in schizophrenia: a combined anatomic and diffusion weighted magnetic resonance imaging study | Objective: Several magnetic resonance imaging (MRI) and postmortem studies have supported the role of the thalamus in the pathophysiology of schizophrenia. Interestingly, a recent small diffusion weighted imaging (DWI) study showed abnormal thalamic microstructure in patients with schizophrenia. The... | 2008-01-01 | |
| 20 |
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Schmidt, Meic H. | Minimally invasive thoracoscopic resection of paraspinal neurogenic tumors: technical case report | OBJECTIVE: The posterior mediastinum is a common location for benign neurogenic tumors. They are frequently asymptomatic but can present with local compressive or neurological symptoms. METHODS: Thoracoscopy is used increasingly over posterolateral thoracotomy for the removal of these lesions. RES... | 2008-01-01 | |
| 21 |
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Gerig, Guido | Minimum description length with local geometry | Establishing optimal correspondence across object populations is essential to statistical shape analysis. Minimizing the description length (MDL) is a popular method for finding correspondence. In this work, we extend the MDL method by incorporating various local curvature metrics. Using local curva... | 2008-01-01 | |
| 22 |
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Gerig, Guido | Multivariate longitudinal statistics for neonatal-pediatric brain tissue development | The topic of studying the growth of human brain development has become of increasing interest in the neuroimaging community. Cross-sectional studies may allow comparisons between means of different age groups, but they do not provide a growth model that integrates the continuum of time, nor do they ... | 2008-01-01 | |
| 23 |
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Couldwell, William T.; Gillespie, David L.; Jensen, Randy L. | Novel model of intracranial meningioma in mice using luciferase-expressing meningioma cells | Object. Meningioma research has been hindered by the inability to sequentially measure intracranial tumor growth in a cost-effective, efficient manner. Recently, the luciferase gene has been transfected into cancer lines to obtain cells that express the luciferase enzyme, which oxidizes luciferin in... | 2008-01-01 | |
| 24 |
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Couldwell, William T. | OR noise: the potential for hearing loss | With the use of the electric or air-powered drill in cranial or spinal procedures comes the potential for hearing loss among operating team members. Exposure to loud noise can result in sensorineural hearing loss, and this loss is a function of sound pressure levels and duration of exposure. Much r... | 2008-01-01 | |
| 25 |
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Sekercioglu, Cagan | People skills for the conservation professional | Conservation scientists are increasingly becoming aware of the importance of the human aspects of conservation, and in conservation circles, ‘‘social science'' is the word of the day. There is a rapidly growing social science working group in the Society for Conservation Biology and it is hard t... | 2008-01-01 |