Search results for "NAVIGATION"

Image guidance to improve reliability and data integrity of transcranial Doppler sonography.

2012

Abstract Background Principles and accuracy of image-guided transcranial Doppler (IG TCD) sonography have been published recently. However, it remains open whether combination of image guidance and TCD offers an additional clinical advantage. This study scores the accuracy of conventional TCD examinations and investigates the potential improvement of TCD data integrity and reliability regarding the additional use of IG. Methods Conventional TCD was performed by a group of experienced investigators, who were blinded to images of a navigation system tracking the Doppler probe, whereas an independent observer documented the TCD findings, acquired by the investigators, due to saving spatial dat…

Universally Designed Beacon-Assisted Indoor Navigation for Emergency Evacuations

2019

International audience; The United Nations (UN) Convention on the Rights of Persons with Disabilities (CRPD) obligates national governments to ensure the protection and safety of persons with disabilities in emergency situations. This article examines the application and accessibility of state-of-the-art ICT solutions in emergency situations. Research has indeed shown that the design and implementation of evacuation procedures in emergency situations play a critical role in ensuring personal safety and protection. While research has examined the experiences of persons including persons with disabilities in emergency situations, research has yet to examine fully the role that cutting-edge in…

Kuģa vraka aizvākšanas tiesības zemūdens kultūras mantojuma aizsardzības kontekstā

2017

Promocijas darbā tiek padziļināti pētīta kuģošanas tiesību nozare un tās vēsturiskā attīstība Latvijā, un kuģošanas tiesību galvenā objekta – kuģa un ar tā vraka aizvākšanu saistītās tiesības zemūdens kultūras mantojuma aizsardzības kontekstā, kā arī tiek pievērsta uzmanība vraku aizvākšanas tiesiskajam regulējumam attiecībā uz kuģošanas drošību un jūras vides aizsardzību. Tiek analizēts kuģu vraku tiesiskais regulējums Latvijas Republikas nacionālajos tiesību aktos, ārvalstu tiesībās un starptautiskajos līgumos ar mērķi pilnveidot kuģu vraku aizvākšanas normatīvi tiesisko regulējumu Latvijas Republikā, lai nodrošinātu drošu kuģošanu, jūras vides aizsardzību un zemūdens kultūras mantojuma a…

The "Laparoscopic Neuro-Navigation" -- LANN: from a functional cartography of the pelvic autonomous neurosystem to a new field of laparoscopic surgery

2006

It is the objective of this study to etablish the technique of laparoscopic exposure of all pelvic somatic and autonomous nerves. In all our patients who underwent a laparoscopic surgical approach of the retroperitoneum, exposure and assessment of the exposed nerves using laparoscopic neuro-navigation were performed. Laparoscopic surgery allows the surgical approach to all pelvic nerves, particularly to the sciatic nerve, the pudendal nerve and the splanchnic pelvic nerves. We describe a cartography of the functional anatomy of the pelvic plexus and elaborate on the concept of "laparoscopic pelvic functional surgery". © 2004 Taylor & Francis.

Optimizing the Sampling Area across an Old-Growth Forest via UAV-Borne Laser Scanning, GNSS, and Radial Surveying

2022

Aboveground biomass, volume, and basal area are among the most important structural attributes in forestry. Direct measurements are cost-intensive and time-consuming, especially for old-growth forests exhibiting a complex structure over a rugged topography. We defined a methodology to optimize the plot size and the (total) sampling area, allowing for structural attributes with a tolerable error to be estimated. The plot size was assessed by analyzing the semivariogram of a CHM model derived via UAV laser scanning, while the sampling area was based on the calculation of the absolute relative error as a function of allometric relationships. The allometric relationships allowed the structural …

The web-based Language and Style course, e-learning and stylistics

2006

Age differences in the role of the cannabinoid type 1 receptor on glutamatergic neurons in habituation and spatial memory acquisition

2015

Abstract Aims Aging is typically linked with a decline in memory performance and alterations in neural integrity. In pathological aging such as Alzheimer's disease, these effects are aggravated. Studies using cannabinoid CB1 receptor-deficient mice have shown a role of the endocannabinoid system in memory processing and neuroprotection. As the CB1 receptor is expressed in various neuronal populations, in this study, we aimed at investigating the consequences of CB1 receptor gene inactivation in cortical glutamatergic neurons in mice (Glu-CB1-KO) in regard to age-related alterations in spatial memory performance. Main methods Juvenile (5.5–7.5 weeks), adult (5.5–7 months), and old (11.5–14 m…

Alcohol preference, behavioural reactivity and cognitive functioning in female rats exposed to a three-bottle choice paradigm.

2012

Alcohol abuse is a substantial and growing health problem in Western societies. In the last years in vivo and in vitro studies have suggested that males and females display a different alcohol drinking behaviour, with swingeing differences not only in the propensity for alcohol use but also in the metabolic and behavioural consequences. In this study we investigated, in adult female rats, ethanol self-administration and preference pattern using a 3-bottle paradigm with water, 10% ethanol solution, and white wine (10%, v/v), along a four-week period. The influence of alcohol free-access on explorative behaviour in the open field (OF), and on spatial learning and reference memory in the Morri…

Assessing Reliability, Heritability and General Cognitive Ability in a Battery of Cognitive Tasks for Laboratory Mice

2005

This report includes the first sibling study of mouse behavior, and presents evidence for a heritable general cognitive ability (g) factor influencing cognitive batteries. Data from a population of male and female outbred mice (n = 84), and a replication study of male sibling pairs (n = 167) are reported. Arenas employed were the T-maze, the Morris water maze, the puzzle box, the Hebb-Williams maze, object exploration, a water plus-maze, and a second food-puzzle arena. The results show a factor structure consistent with the presence of g in mice. Employing one score per arena, this factor accounts for 41% of the variance in the first study (or 36% after sex regression) and 23% in the second…

Virtual temporal bone: an interactive 3-dimensional learning aid for cranial base surgery.

2009

OBJECTIVE: We have developed an interactive virtual model of the temporal bone for the training and teaching of cranial base surgery. METHODS: The virtual model was based on the tomographic data of the Visible Human Project. The male Visible Human's computed tomographic data were volumetrically reconstructed as virtual bone tissue, and the individual photographic slices provided the basis for segmentation of the middle and inner ear structures, cranial nerves, vessels, and brainstem. These structures were created by using outlining and tube editing tools, allowing structural modeling either directly on the basis of the photographic data or according to information from textbooks and cadaver…