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1

Brain representations for acquiring and recalling visual-motor adaptations.  

PubMed

Humans readily learn and remember new motor skills, a process that likely underlies adaptation to changing environments. During adaptation, the brain develops new sensory-motor relationships, and if consolidation occurs, a memory of the adaptation can be retained for extended periods. Considerable evidence exists that multiple brain circuits participate in acquiring new sensory-motor memories, though the networks engaged in recalling these and whether the same brain circuits participate in their formation and recall have less clarity. To address these issues, we assessed brain activation with functional MRI while young healthy adults learned and recalled new sensory-motor skills by adapting to world-view rotations of visual feedback that guided hand movements. We found cerebellar activation related to adaptation rate, likely reflecting changes related to overall adjustments to the visual rotation. A set of parietal and frontal regions, including inferior and superior parietal lobules, premotor area, supplementary motor area and primary somatosensory cortex, exhibited non-linear learning-related activation that peaked in the middle of the adaptation phase. Activation in some of these areas, including the inferior parietal lobule, intra-parietal sulcus and somatosensory cortex, likely reflected actual learning, since the activation correlated with learning after-effects. Lastly, we identified several structures having recall-related activation, including the anterior cingulate and the posterior putamen, since the activation correlated with recall efficacy. These findings demonstrate dynamic aspects of brain activation patterns related to formation and recall of a sensory-motor skill, such that non-overlapping brain regions participate in distinctive behavioral events. PMID:25019676

Bédard, Patrick; Sanes, Jerome N

2014-11-01

2

Reliability of the Motor Learning Strategy Rating Instrument for Children and Youth with Acquired Brain Injury  

ERIC Educational Resources Information Center

Purpose: To evaluate reliability and feasibility of the Motor Learning Strategy Rating Instrument (MLSRI) in children with acquired brain injury (ABI). The MLSRI quantifies the extent to which motor learning strategies (MLS) are used within physiotherapy (PT) interventions. Methods: PT sessions conducted by ABI team physiotherapists with a…

Kamath, Trishna; Pfeifer, Megan; Banerjee-Guenette, Priyanka; Hunter, Theresa; Ito, Julia; Salbach, Nancy M.; Wright, Virginia; Levac, Danielle

2012-01-01

3

Non-Speech Oro-Motor Exercise Use in Acquired Dysarthria Management: Regimes and Rationales  

ERIC Educational Resources Information Center

Background: Non-speech oro-motor exercises (NSOMExs) are described in speech and language therapy manuals and are thought to be much used in acquired dysarthria intervention, though there is no robust evidence of an influence on speech outcome. Opinions differ as to whether, and for which dysarthria presentations, NSOMExs are appropriate. Aims:…

Mackenzie, Catherine; Muir, Margaret; Allen, Carolyn

2010-01-01

4

Action observation and acquired motor skills: an FMRI study with expert dancers.  

PubMed

When we observe someone performing an action, do our brains simulate making that action? Acquired motor skills offer a unique way to test this question, since people differ widely in the actions they have learned to perform. We used functional magnetic resonance imaging to study differences in brain activity between watching an action that one has learned to do and an action that one has not, in order to assess whether the brain processes of action observation are modulated by the expertise and motor repertoire of the observer. Experts in classical ballet, experts in capoeira and inexpert control subjects viewed videos of ballet or capoeira actions. Comparing the brain activity when dancers watched their own dance style versus the other style therefore reveals the influence of motor expertise on action observation. We found greater bilateral activations in premotor cortex and intraparietal sulcus, right superior parietal lobe and left posterior superior temporal sulcus when expert dancers viewed movements that they had been trained to perform compared to movements they had not. Our results show that this 'mirror system' integrates observed actions of others with an individual's personal motor repertoire, and suggest that the human brain understands actions by motor simulation. PMID:15616133

Calvo-Merino, B; Glaser, D E; Grèzes, J; Passingham, R E; Haggard, P

2005-08-01

5

Reduction of Stereotypic Motor Behavior in a Child with Acquired Brain Injury Through Contingent Instructional-Pacing  

Microsoft Academic Search

Contingent instructional-pacing was used successfully to reduce the frequency of stereotypic motor behavior displayed by a 15-year old boy with acquired brain injury. The intervention procedure consisted of presenting verbal instructions to the boy that required him to perform a simple motor response, for a two minute duration, each time stereotypy was demonstrated. During a treatment fading phase, the duration

Elizabeth Peck; Andrea Potoczny-Gray; James K. Luiselli

1999-01-01

6

Onset of acquired autoimmune hypothyroidism in infancy: a presentation of delayed gross-motor development and rhabdomyolysis  

Microsoft Academic Search

We report the case of a 23-month-old girl who presented with poor growth and delayed attainment of gross-motor milestones.\\u000a Elevated creatine phosphokinase (CPK) indicated rhabdomyolysis, ultimately attributed to severe, acquired autoimmune hypothyroidism.\\u000a Growth data and bone-age suggest the onset of hypothyroidism occurred at or before 12 months of age. Acquired hypothyroidism\\u000a is rare before age 3 years, and rhabdomyolysis due to hypothyroidism

Daniel F. Gunther; Harvey K. Chiu; Thomas E. Numrych; Gad B. Kletter

2006-01-01

7

The fusion of early endosomes induces molecular-motor-driven tubule formation and fission.  

PubMed

Organelles in the endocytic pathway interact and communicate through the crucial mechanisms of fusion and fission. However, any specific link between fusion and fission has not yet been determined. To study the endosomal interactions with high spatial and temporal resolution, we enlarged the endosomes by two mechanistically different methods: by expression of the MHC-class-II-associated chaperone invariant chain (Ii; or CD74) or Rab5, both of which increased the fusion rate of early endosomes and resulted in enlarged endosomes. Fast homotypic fusions were studied, and immediately after the fusion a highly active and specific tubule formation and fission was observed. These explosive tubule formations following fusion seemed to be a direct effect of fusion. The tubule formations were dependent on microtubule interactions, and specifically controlled by Kif16b and dynein. Our results show that fusion of endosomes is a rapid process that destabilizes the membrane and instantly induces molecular-motor-driven tubule formation and fission. PMID:22357949

Skjeldal, Frode M; Strunze, Sten; Bergeland, Trygve; Walseng, Even; Gregers, Tone F; Bakke, Oddmund

2012-04-15

8

Remote sensing of shorelines using data fusion of hyperspectral and multispectral imagery acquired from mobile and fixed platforms  

NASA Astrophysics Data System (ADS)

An optimized data fusion methodology is presented and makes use of airborne and vessel mounted hyperspectral and multispectral imagery acquired at littoral zones in Florida and the northern Gulf of Mexico. The results demonstrate the use of hyperspectral-multispectral data fusion anomaly detection along shorelines and in surface and subsurface waters. Hyperspectral imagery utilized in the data fusion analysis was collected using a 64-1024 channel, 1376 pixel swath width; temperature stabilized sensing system; an integrated inertial motion unit; and differential GPS. The imaging system is calibrated using dual 18 inch calibration spheres, spectral line sources, and custom line targets. Simultaneously collected multispectral three band imagery used in the data fusion analysis was derived either a 12 inch focal length large format camera using 9 inch high speed AGFA color negative film, a 12.3 megapixel digital camera or dual high speed full definition video cameras. Pushbroom sensor imagery is corrected using Kalman filtering and smoothing in order to correct images for airborne platform motions or motions of a small vessel. Custom software developed for the hyperspectral system and the optimized data fusion process allows for post processing using atmospherically corrected and georeferenced reflectance imagery. The optimized data fusion approach allows for detecting spectral anomalies in the resolution enhanced data cubes. Spectral-spatial anomaly detection is demonstrated using simulated embedded targets in actual imagery. The approach allows one to utilize spectral signature anomalies to identify features and targets that would otherwise not be possible. The optimized data fusion techniques and software has been developed in order to perform sensitivity analysis of the synthetic images in order to optimize the singular value decomposition model building process and the 2-D Butterworth cutoff frequency selection process, using the concept of user defined "feature areas". The data fusion "synthetic imagery" forms a basis for spectral-spatial resolution enhancement for optimal band selection and remote sensing algorithm development within "spectral anomaly areas". The methods are applied to imagery intended to support Deepwater Horizon oil spill remediation and recovery efforts. Sensitivity analysis demonstrates the data fusion methodology is most sensitive to (a) the pixels and features used in the SVD model building process and (b) the 2-D Butterworth cutoff frequency optimized by application of K-S nonparametric test. The optimized image fusion approach is transferable to sensor data acquired from other platforms, including autonomous underwater vehicles using near real time processing.

Bostater, Charles R.; Frystacky, Heather

2012-06-01

9

Acquired motor neuron loss causing severe pelvic limb contractures in a young cat  

Microsoft Academic Search

Presentation This report describes a kitten with paraplegia and extensor rigidity of the pelvic limbs associated with motor neuron loss and chronic denervation of skeletal muscle. Persistent skeletal muscle atrophy and degeneration had resulted in immobile stifle and hock joints and severe pelvic limb rigidity consistent with a neurogenic form of arthrogryposis. Both pelvic limbs were equally affected and the

Cecilia Rohdin; Erika Karlstam; Karin Hultin Jäderlund; G. Diane Shelton

2010-01-01

10

Acquiring a Novel Coordination Skill without Practicing the Correct Motor Commands  

Microsoft Academic Search

There is evidence that experience of the sensory consequences, in the absence of practice of the required motor commands, is sufficient to learn new bimanual coordination patterns. This was shown through improvements of an incongruent group who practiced a desired 30° phase offset between the limbs while 1 limb was weighted such that the desired phase relation was achieved when

Lieke Feijen; Nicola J. Hodges; Peter J. Beek

2010-01-01

11

Microglia in the giant cell encephalitis of acquired immune deficiency syndrome: proliferation, infection and fusion  

Microsoft Academic Search

The autopsied brains of three homosexual men with acquired immune deficiency syndrome (AIDS), progressive encephalopathy and widespread multinucleated giant cell encephalitis were investigated by lectin and immunohistochemical methods to ascertain the cellular distribution of a human immunodeficiency virus (HIV) core protein, p25. Abundant viral antigen was present in all brains, limited to perivascular macrophages, microglial and multinucleated cells, some bearing

J. Michaels; R. W. Price; M. K. Rosenblum

1988-01-01

12

Highly Efficient Retrograde Gene Transfer into Motor Neurons by a Lentiviral Vector Pseudotyped with Fusion Glycoprotein  

PubMed Central

The development of gene therapy techniques to introduce transgenes that promote neuronal survival and protection provides effective therapeutic approaches for neurological and neurodegenerative diseases. Intramuscular injection of adenoviral and adeno-associated viral vectors, as well as lentiviral vectors pseudotyped with rabies virus glycoprotein (RV-G), permits gene delivery into motor neurons in animal models for motor neuron diseases. Recently, we developed a vector with highly efficient retrograde gene transfer (HiRet) by pseudotyping a human immunodeficiency virus type 1 (HIV-1)-based vector with fusion glycoprotein B type (FuG-B) or a variant of FuG-B (FuG-B2), in which the cytoplasmic domain of RV-G was replaced by the corresponding part of vesicular stomatitis virus glycoprotein (VSV-G). We have also developed another vector showing neuron-specific retrograde gene transfer (NeuRet) with fusion glycoprotein C type, in which the short C-terminal segment of the extracellular domain and transmembrane/cytoplasmic domains of RV-G was substituted with the corresponding regions of VSV-G. These two vectors afford the high efficiency of retrograde gene transfer into different neuronal populations in the brain. Here we investigated the efficiency of the HiRet (with FuG-B2) and NeuRet vectors for retrograde gene transfer into motor neurons in the spinal cord and hindbrain in mice after intramuscular injection and compared it with the efficiency of the RV-G pseudotype of the HIV-1-based vector. The main highlight of our results is that the HiRet vector shows the most efficient retrograde gene transfer into both spinal cord and hindbrain motor neurons, offering its promising use as a gene therapeutic approach for the treatment of motor neuron diseases. PMID:24086660

Hirano, Miyabi; Kato, Shigeki; Kobayashi, Kenta; Okada, Tomoaki; Yaginuma, Hiroyuki; Kobayashi, Kazuto

2013-01-01

13

Fusion of real-time transrectal ultrasound with pre-acquired MRI for multi-modality prostate imaging  

NASA Astrophysics Data System (ADS)

A system for fusion of realtime transrectal ultrasound (TRUS) with pre-acquired 3D images of the prostate was designed and demonstrated in phantoms and volunteer patients. Biopsy guides for endocavity ultrasound transducers were equipped with customized 6 degree-of-freedom (DoF) electromagnetic (EM) tracking sensors, compatible with the Aurora EM tracking system (Northern Digital Inc, NDI, Waterloo, ON, Canada). The biopsy guides were attached to an ultrasound probe and calibrated to map tracking coordinates with ultrasound image coordinates. Six cylindrical gold seeds were placed in a prostate phantom to serve as fiducial markers. The fiducials were first identified manually in 3T magnetic resonance (MR) images collected with an endorectal coil. The phantom was then imaged with tracked realtime TRUS and the fiducial markers were identified in the live image using custom software. Rigid registrations between MR and ultrasound image space were computed and evaluated using subsets of the fiducial markers. Twelve patients were scanned with 3T MRI and TRUS for biopsy and seed placement. In ten patients, volumetric ultrasound images were reconstructed from 2D sweeps of the prostate and were manually registered with the MR. The rigid registrations were used to display live TRUS images fused with spatially corresponding realtime multiplanar reconstructions (MPRs) of the MR image volume. Registration accuracy was evaluated by segmenting the prostate in the MR and volumetric ultrasound and computing distance measures between the two segmentations. In the phantom experiments, registration accuracies of 2.2 to 2.3 mm were achieved. In the patient studies, the average root mean square distance between the MR and TRUS segmentations was 3.1 mm, the average Hausdorff distance was 9.8 mm. Deformation of the prostate during MR and TRUS scan was identified as the primary source of error. Realtime MR/TRUS image fusion is feasible and is a promising approach to improved target visualization during TRUS-guided biopsy or therapy procedures.

Krücker, Jochen; Xu, Sheng; Glossop, Neil; Guion, Peter; Choyke, Peter; Ocak, Iclal; Singh, Anurag K.; Wood, Bradford J.

2007-03-01

14

Promoting Adaptive Behavior in Persons with Acquired Brain Injury, Extensive Motor and Communication Disabilities, and Consciousness Disorders  

ERIC Educational Resources Information Center

These two studies extended the evidence on the use of technology-based intervention packages to promote adaptive behavior in persons with acquired brain injury and multiple disabilities. Study I involved five participants in a minimally conscious state who were provided with intervention packages based on specific arrangements of optic, tilt, or…

Lancioni, Giulio E.; Singh, Nirbhay N.; O'Reilly, Mark F.; Sigafoos, Jeff; Belardinelli, Marta Olivetti; Buonocunto, Francesca; Sacco, Valentina; Navarro, Jorge; Lanzilotti, Crocifissa; De Tommaso, Marina; Megna, Marisa; Badagliacca, Francesco

2012-01-01

15

Fusion of visuo-ocular and vestibular signals in arm motor control.  

PubMed

Keeping the finger pointing at an Earth-fixed object during body displacements can be achieved if compensatory arm movements counteract the effect of the rotation on the hand's position in space. Here we investigated the fusion of signals that originated from systems having different neurophysiological properties (i.e., the visuo-oculomotor and vestibular systems) in the production of such compensatory arm movements. To this end, we analyzed the subjects' performance in three conditions that differed according to the information they provided about relative target-body motion. This information originated either from the vestibular or visuo-oculomotor system, or from a combination of the two. To highlight the integration of visuo-oculomotor and vestibular signals, we compared the arm response to motion frequencies presumed to allow or not to allow optimal vestibular and oculomotor responses. When they could be used in isolation, the ocular signals allowed long-latency but precise kinematics control of the arm movement, whereas vestibular signals allowed accurate motor response early in the rotation but their contribution declined as body rotation developed. Optimal performance was obtained throughout the whole movement and for all rotation frequencies when the visuo-oculomotor and vestibular signals could be used together. This increase in hand-tracking performance could not be explained by a unimodal model or an additive model of vestibular and ocular cues, even when using weighted signals. Rather, the results supported a functional model in which vestibular and visuo-oculomotor signals have different influences on the temporal and spatial aspects of hand movement compensating for body motion. PMID:16221749

Guillaud, Etienne; Gauthier, Gabriel; Vercher, Jean-Louis; Blouin, Jean

2006-02-01

16

Human adipose tissue-derived mesenchymal stem cells acquire muscle identity only after spontaneous fusion with myoblasts  

E-print Network

1 Human adipose tissue-derived mesenchymal stem cells acquire muscle identity only after transplantation. Previously, mesenchymal stem cells derived from human adipose tissue (hMADS cells) have been, and skeletal muscle (1-5). From a cell therapy perspective adipose tissue presents several advantages

Paris-Sud XI, Université de

17

Acquired Brain Injury Program.  

ERIC Educational Resources Information Center

This paper reviews the Acquired Brain Injury (ABI) Program at Coastline Community College (California). The ABI Program is a two-year, for-credit educational curriculum designed to provide structured cognitive retraining for adults who have sustained an ABI due to traumatic (such as motor vehicle accident or fall) or non-traumatic(such as…

Schwartz, Stacey Hunter

18

Centrosome and spindle function of the Drosophila Ncd microtubule motor visualized in live embryos using Ncd-GFP fusion proteins  

Microsoft Academic Search

The Ncd microtubule motor protein is required for meiotic and early mitotic chromosome distribution in Drosophila. Null mutant females expressing the Ncd motor fused to the Aequorea victoria green fluorescent protein (GFP), regulated by the wild-type ncd promoter, are rescued for chromosome segregation and embryo viability. Analysis of mitosis in live embryos shows cell cycle-dependent localiza- tion of Ncd-GFP to

Sharyn A. Endow; Donald J. Komma

1996-01-01

19

Clinical Evaluation of Spatial Accuracy of a Fusion Imaging Technique Combining Previously Acquired Computed Tomography and Real-Time Ultrasound for Imaging of Liver Metastases  

SciTech Connect

Purpose: This study was designed to evaluate the spatial accuracy of matching volumetric computed tomography (CT) data of hepatic metastases with real-time ultrasound (US) using a fusion imaging system (VNav) according to different clinical settings. Methods: Twenty-four patients with one hepatic tumor identified on enhanced CT and US were prospectively enrolled. A set of three landmarks markers was chosen on CT and US for image registration. US and CT images were then superimposed using the fusion imaging display mode. The difference in spatial location between the tumor visible on the CT and the US on the overlay images (reviewer no. 1, comment no. 2) was measured in the lateral, anterior-posterior, and vertical axis. The maximum difference (Dmax) was evaluated for different predictive factors.CT performed 1-30 days before registration versus immediately before. Use of general anesthesia for CT and US versus no anesthesia.Anatomic landmarks versus landmarks that include at least one nonanatomic structure, such as a cyst or a calcificationResultsOverall, Dmax was 11.53 {+-} 8.38 mm. Dmax was 6.55 {+-} 7.31 mm with CT performed immediately before VNav versus 17.4 {+-} 5.18 with CT performed 1-30 days before (p < 0.0001). Dmax was 7.05 {+-} 6.95 under general anesthesia and 16.81 {+-} 6.77 without anesthesia (p < 0.0015). Landmarks including at least one nonanatomic structure increase Dmax of 5.2 mm (p < 0.0001). The lowest Dmax (1.9 {+-} 1.4 mm) was obtained when CT and VNav were performed under general anesthesia, one immediately after the other. Conclusions: VNav is accurate when adequate clinical setup is carefully selected. Only under these conditions (reviewer no. 2), liver tumors not identified on US can be accurately targeted for biopsy or radiofrequency ablation using fusion imaging.

Hakime, Antoine, E-mail: thakime@yahoo.com; Deschamps, Frederic; Garcia Marques de Carvalho, Enio; Teriitehau, Christophe; Auperin, Anne; De Baere, Thierry [Gustave Roussy Institute (France)

2011-04-15

20

Acquired hyperpigmentations.  

PubMed

Cutaneous hyperpigmentations are frequent complaints, motivating around 8.5% of all dermatological consultations in our country. They can be congenital, with different patterns of inheritance, or acquired in consequence of skin problems, systemic diseases or secondary to environmental factors. The vast majority of them are linked to alterations on the pigment melanin, induced by different mechanisms. This review will focus on the major acquired hyperpigmentations associated with increased melanin, reviewing their mechanisms of action and possible preventive measures. Particularly prominent aspects of diagnosis and therapy will be emphasized, with focus on melasma, post-inflammatory hyperpigmentation, periorbital pigmentation, dermatosis papulosa nigra, phytophotodermatoses, flagellate dermatosis, erythema dyschromicum perstans, cervical poikiloderma (Poikiloderma of Civatte), acanthosis nigricans, cutaneous amyloidosis and reticulated confluent dermatitis. PMID:24626644

Cestari, Tania Ferreira; Dantas, Lia Pinheiro; Boza, Juliana Catucci

2014-01-01

21

Hypothetical Explanations for Fusion Maldevelopment Nystagmus Syndrome and Infantile Nystagmus Syndrome using a Behavioral Ocular Motor System Model  

Microsoft Academic Search

For best possible vision, the ocular motor system (OMS) continually has to keep the eyes properly aimed and stable, despite challenges to this stability, whether external or internally generated, such as in the case of nystagmus. We have developed a behavioral model of the OMS that can simulate both normal operation as well as two forms of congenitally present nystagmus,

Jonathan B. JACOBS; Louis F. DELL' OSSO

22

A role for motor and somatosensory evoked potentials during anterior cervical discectomy and fusion for patients without myelopathy: Analysis of 57 consecutive cases  

PubMed Central

Background: Although the usage of combined motor and sensory intraoperative monitoring has been shown to improve the surgical outcome of patients with cervical myelopathy, the role of transcranial electric motor evoked potentials (tceMEP) used in conjunction with somatosensory evoked potentials (SSEP) in patients presenting with radiculopathy but without myelopathy has been less clear. Methods: We retrospectively reviewed all patients (n = 57) with radiculopathy but without myelopathy, undergoing anterior cervical decompression and fusion at a single institution over the past 3 years, who had intraoperative monitoring with both tceMEPs and SSEPs. Results: Fifty-seven (100%) patients presented with radiculopathy, 53 (93.0%) with mechanical neck pain, 35 (61.4%) with motor dysfunction, and 29 (50.9%) with sensory deficits. Intraoperatively, 3 (5.3%) patients experienced decreases in SSEP signal amplitudes and 4 (6.9%) had tceMEP signal changes. There were three instances where a change in neuromonitoring signal required intraoperative alteration of the surgical procedure: these were deemed clinically significant events/true positives. SSEP monitoring showed two false positives and two false negatives, whereas tceMEP monitoring only had one false positive and no false negatives. Thus, tceMEP monitoring exhibited higher sensitivity (33.3% vs. 100%), specificity (95.6% vs. 98.1%), positive predictive value (33.3% vs. 75.0%), negative predictive value (97.7% vs. 100%), and efficiency (91.7% vs. 98.2%) compared to SSEP monitoring alone. Conclusions: Here, we present a retrospective series of 57 patients where tceMEP/SSEP monitoring likely prevented irreversible neurologic damage. Though further prospective studies are needed, there may be a role for combined tceMEP/SSEP monitoring for patients undergoing anterior cervical decompression without myelopathy. PMID:22059128

Xu, Risheng; Ritzl, Eva K.; Sait, Mohammed; Sciubba, Daniel M.; Wolinsky, Jean-Paul; Witham, Timothy F.; Gokaslan, Ziya L.; Bydon, Ali

2011-01-01

23

[Acquired hypertriglyceridemia].  

PubMed

Hypertriglyceridemia is associated with an increase in very low density lipoprotein (VLDL), chylomicron, intermediate density lipoprotein(IDL). Acquired hyperlipidemia results from various disorders, such as obesity, diabetes mellitus, alcohol overuse, chronic kidney disease, hypothyroidism, and some drugs like thiazide, -blocker, estrogen, etc. It is important to identify secondary causes underlying hypertriglyceridemia before initiating pharmacotherapy, since management of the causative disorders is the first-line therapy. Even if hyperlipidemia is not controlled after treating the underlying disorders, specific lipid -lowering therapy may be required in addition to lifestyle modification. Fibrate, nicotinic acid and eicosapentaenoic acid are utilized to reduce triglyceride levels. Statin and ezetimibe are utilized if non-high density lipoprotein(HDL)-cholesterol is elevated. PMID:24205720

Takahashi, Manabu; Ishibashi, Shun

2013-09-01

24

Motor Dysfunction III: Concussion, Acquired Brain  

E-print Network

at risk ­Reported youth concussion, 2007-8, USA · Football - 70,000 (estimates up to 200,000) · Girls soccer - 24,000 · Boys soccer - 17,000 · Girls basketball - 7,000 Second Impact Syndrome · Caused condition = epilepsy · Estimated 3% will be diagnosed ­highest incidence, young children & elderly

Sergio, Lauren E.

25

Corticomotoneuronal function and hyperexcitability in acquired neuromyotonia.  

PubMed

Acquired neuromyotonia encompasses a group of inflammatory disorders characterized by symptoms reflecting peripheral nerve hyperexcitability, which may be clinically confused in the early stages with amyotrophic lateral sclerosis. Despite a clear peripheral nerve focus, it remains unclear whether the ectopic activity in acquired neuromyotonia receives a central contribution. To clarify whether cortical hyperexcitability contributes to development of clinical features of acquired neuromyotonia, the present study investigated whether threshold tracking transcranial magnetic stimulation could detect cortical hyperexcitability in acquired neuromyotonia, and whether this technique could differentiate acquired neuromyotonia from amyotrophic lateral sclerosis. Cortical excitability studies were undertaken in 18 patients with acquired neuromyotonia and 104 patients with amyotrophic lateral sclerosis, with results compared to 62 normal controls. Short-interval intracortical inhibition in patients with acquired neuromyotonia was significantly different when compared to patients with amyotrophic lateral sclerosis (averaged short interval intracortical inhibition acquired neuromyotonia 11.3 +/- 1.9%; amyotrophic lateral sclerosis 2.6 +/- 0.9%, P < 0.001). In addition, the motor evoked potential amplitudes (acquired neuromyotonia 21.0 +/- 3.1%; amyotrophic lateral sclerosis 38.1 +/- 2.2%, P < 0.0001), intracortical facilitation (acquired neuromyotonia -0.9 +/- 1.3%; amyotrophic lateral sclerosis -2.3 +/- 0.6%, P < 0.0001), resting motor thresholds (acquired neuromyotonia 62.2 +/- 1.6%; amyotrophic lateral sclerosis 57.2 +/- 0.9%, P < 0.05) and cortical silent period durations (acquired neuromyotonia 212.8 +/- 6.9 ms; amyotrophic lateral sclerosis 181.1 +/- 4.3 ms, P < 0.0001) were significantly different between patients with acquired neuromyotonia and amyotrophic lateral sclerosis. Threshold tracking transcranial magnetic stimulation established corticomotoneuronal integrity in acquired neuromyotonia, arguing against a contribution of central processes to the development of nerve hyperexcitability in acquired neuromyotonia. PMID:20736187

Vucic, Steve; Cheah, Benjamin C; Yiannikas, Con; Vincent, Angela; Kiernan, Matthew C

2010-09-01

26

Piezoceramic Ultrasonic Motor Technology  

SciTech Connect

The objective of this project was to team Aerotech and AlliedSignal FM and T (AS) to develop a cost-efficient process for small-batch, high performance PZT motor production. Aerotech would acquire the basic process expertise in motor fabrication, assembly, and testing from AS. Together, Aerotech and AS were to identify appropriate process improvements, focusing on raw material quality, manufacturing processes, and durability assessment. Aerotech would then design and build a motor in consultation with AS. Aerotech engineering observed motor manufacturing in the AS piezo lab and worked side by side with AS personnel to build and test a prototype motor to facilitate learning the technology. Using information from AS and hands-on experience with the AS motor drive system enabled Aerotech to design and build its own laboratory drive system to operate motors. The team compiled information to establish a potential piezo motor users' list, and an intellectual property search was conducted to understand current patent and IP (intellectual property) status of motor design. Work was initiated to identify and develop an American source for piezo motor elements; however, due to manpower restraints created by the resignation of the AS Ph.D. ceramist responsible for these tasks, the project schedule slipped. The project was subsequently terminated before significant activities were accomplished. AS did, however, provide Aerotech with contacts in Japanese industry that are willing and capable of supplying them with special design motor elements.

Burden, J.S.

1999-02-24

27

Spinal fusion  

MedlinePLUS

Vertebral interbody fusion; Posterior spinal fusion; Arthrodesis; Anterior spinal fusion; Spine surgery - spinal fusion ... Spinal fusion is most often done along with other surgical procedures of the spine. It may be done: With ...

28

[Acquired von Willebrand's disease].  

PubMed

We describe a patient with acquired von Willebrand's disease and Waldenström's macroglobulinemia. He suffered from an acquired tendency to bleed. The laboratory findings were identical to those of congenital von Willebrand's disease. The acquired form of this bleeding disorder is seen in association with immunologically active B cell lymphomas, certain other malignant tumours, and autoimmune diseases. The incidence and prevalence are unknown, but this disorder is probably uncommon. We discuss possible pathogenetic mechanisms. Acquired von Willebrand's disease should be considered in patients with an acquired tendency to bleed, especially if the patient also has a lymphoproliferative, neoplastic, or autoimmune disease. PMID:8332973

Berentsen, S; Hammerstrøm, J

1993-05-10

29

Motor Acquisition Rate in Brazilian Infants  

ERIC Educational Resources Information Center

This study used the Alberta Infant Motor Scale (AIMS) with the aim of characterizing motor acquisition rate in 70 healthy 0-6-month-old Brazilian infants, as well as comparing both emergence (initial age) and establishment (final age) of each skill between the study sample and the AIMS normative data. New motor skills were continuously acquired

Lopes, Virlaine Bardella; de Lima, Carolina Daniel; Tudella, Eloisa

2009-01-01

30

Laboratory?Acquired Infections  

Microsoft Academic Search

Laboratory-acquired infections due to a wide variety of bacteria, viruses, fungi, and parasites have been described. Although the precise risk of infection after an exposure remains poorly defined, surveys of laboratory-acquired infections suggest that Brucella species, Shigella species, Salmonella species, Mycobacterium tuberculosis, and Neisseria meningitidis are the most common causes. Infections due to the bloodborne pathogens (hepatitis B virus, hepatitis

Kamaljit Singh

2009-01-01

31

Motor Tutorials  

NSDL National Science Digital Library

This website provides tutorials with some animations on topics such as motor principles, phase angle control, pulse width modulation, and power topologies. Students can learn more about DC motors, stepper motors, brushless AC motors and more. These materials could be used as part of an in-class discussion or explored independently.

2013-06-13

32

Motor imagery facilitates force field learning.  

PubMed

Humans have the ability to produce an internal reproduction of a specific motor action without any overt motor output. Recent findings show that the processes underlying motor imagery are similar to those active during motor execution and both share common neural substrates. This suggests that the imagery of motor movements might play an important role in acquiring new motor skills. In this study we used haptic robot in conjunction with motor imagery technique to improve learning in a robot-based adaptation task. Two groups of subjects performed reaching movements with or without motor imagery in a velocity-dependent and position-dependent mixed force field. The groups performed movements with motor imagery produced higher after effects and decreased muscle co-contraction with respect to no-motor imagery group. These results showed a positive influence of motor imagery on acquiring new motor skill and suggest that motor learning can be facilitated by mental practice and could be used to increase the rate of adaptation. PMID:21555118

Anwar, Muhammad Nabeel; Tomi, Naoki; Ito, Koji

2011-06-13

33

[Acquired B antigen].  

PubMed

Many cases of acquired B antigens, always observed in group A subjects have been so far reported. Most of them were found in patients with digestive tract disease, essentially colonic cancer. An investigation on 200 patients in a gastroenterology department showed that this B-like antigen was quite frequent (10,6%); it occurred only in A1 individuals and was related to infectious syndrome. Immunological and serological studies of many cases had shown that this B-like antigen differs from that of normal B cells. Groupe A1 cells transfused to patients acquired B activity; on the contrary group A2 and O cells remained unchanged. Likewise, only A1 cell became active when incubated in vitro with C. Tertium A., known to contain a deacetylase. In 1970, we postulated that a deacetylase enzyme could be responsible for this B-like antigen: this enzyme could transform the N-acetylgalactosamine (A specific sugar) into galactosamine, which could cross react with anti-B sera. The relationship between the acquired B antigen and a deacetylase was recently confirmed: A1 acquired B cells, chemically acetylated lost their B reactivity and enhanced their A1 activity. A polyagglutinability, different from that associated with T, Tn, Cad, Hempas has been always found in acquired B cells; nervertheless, because of its weakness, it could sometimes be unnoticed. Besides, it disappeared prior to B reactivity in case of recovery. Like acquired B activity, it decreased in low pH medium of after acetylation of the cells. Nevertheless, this polyagglutinability appears, contrarly to acquired B antigen, in vitro, on all the cells, irrespective of their ABO phenotypes. A deacetylation of N-acetyl-neruaminic acid could explain such a phenomenon. PMID:61608

Gerbal, A; Ropars, C

1976-03-01

34

Acquired upper airway obstruction  

Microsoft Academic Search

Acquired upper airway obstruction is a common cause of respiratory emergencies in children. Most pathologic processes that result in upper airway compromise are a consequence of infection, trauma or aspiration. Today, many of the infectious causes of upper airway obstruction have lost their threat as a result of the progress made in preventing and treating these infections. Prompt recognition and

Jürg Hammer

2004-01-01

35

Community-acquired pneumonia  

Microsoft Academic Search

Community-acquired pneumonia (CAP) is a significant cause of morbidity and mortality in all age groups, especially the elderly, which is a patient population that continues to grow. Recently the spectrum and clinical picture of pneumonia has been changing as a reflection of this aging population; this requires a reassessment of and a new approach to the patient with pneumonia. Currently,

Michael S. Nieclerman

1998-01-01

36

Dysprosody following acquired neurogenic impairment.  

PubMed

Dysprosody is typically associated with the dysarthrias following acquired neurogenic disturbance but it has also been associated with impairment to the cortex of the right cerebral hemisphere (Behrens, 1985). Currently there is little agreement in the clinical literature as to the locus or nature of processes involved in production and reception of prosody. This paper investigates the usefulness of two psycholinguistic models of prosody--involving "abstract" and "concrete" processes (Ladd & Cutler, 1983)--in accounting for dysprosody following motor pathway as well as cortical lesions. Four groups of 10 adult patients each participated in the study; the first group had sustained a right cerebral hemisphere cortical stroke, the second group had hypokinetic dysarthria, the third group had ataxic dysarthria, and the fourth group was normal controls. Acoustic analysis using the Kay VisiPitch/PC was conducted on pairs of matched noun phrase and noun compounds (e.g., greenhouse, green house), interrogative and declarative versions of sentences, and sentences spoken in each of four different emotional tones. Right cerebral hemisphere damaged subjects produced shorter durations than the other groups for each stimulus class. However, all of the subjects were able to use duration to signal temporal information for the lexical distinction between noun compounds and noun phrases. The results are consistent with a model of prosodic control which involves both cortical as well as physiological control processes. Current treatment for dysprosody is discussed in light of this new emphasis on cognitive control processes. PMID:8353729

Hird, K; Kirsner, K

1993-07-01

37

Systemic Acquired Resistance  

PubMed Central

Upon infection with necrotizing pathogens many plants develop an enhanced resistance to further pathogen attack also in the uninoculated organs. This type of enhanced resistance is referred to as systemic acquired resistance (SAR). In the SAR state, plants are primed (sensitized) to more quickly and more effectively activate defense responses the second time they encounter pathogen attack. Since SAR depends on the ability to access past experience, acquired disease resistance is a paradigm for the existence of a form of “plant memory”. Although the phenomenon has been known since the beginning of the 20th century, major progress in the understanding of SAR was made over the past sixteen years. This review covers the current knowledge of molecular, biochemical and physiological mechanisms that are associated with SAR. PMID:19521483

2006-01-01

38

Subcortical infarction resulting in acquired stuttering  

PubMed Central

Stuttering is an uncommon presentation of acute stroke. Reported cases have often been associated with left sided cortical lesions, aphasia, and difficulties with other non-linguistic tests of rhythmic motor control. Three patients with subcortical lesions resulting in stuttering are discussed. In one patient the ability to perform time estimations with a computerised repetitive time estimation task was characterised.?One patient had a pontine infarct with clinical evidence of cerebellar dysfunction. A second patient had a left basal ganglionic infarct and a disruption of timing estimation. A third patient had a left subcortical infarct and a mild aphasia.?These findings expand the reported distribution of infarction that can result in acquired stuttering. Subcortical mechanisms of speech control and timing may contribute to the pathophysiology of acquired stuttering.?? PMID:10990523

Ciabarra, A.; Elkind, M.; Roberts, J.; Marshall, R.

2000-01-01

39

Rabs grab motors: defining the connections between Rab GTPases and motor proteins  

Microsoft Academic Search

Rab GTPases and their effectors regulate membrane traffic by determining, along with cognate SNAREs, the specificity of transport vesicle docking and fusion steps. Recent studies have also implicated Rabs in the movement of these transport vesicles from their site of formation to their site of fusion, and several Rabs have been linked to specific microtubule- or actin-based motor proteins. Analyses

John A. Hammer; Xufeng S. Wu

2002-01-01

40

Nuclear fusion  

Microsoft Academic Search

The advantages of nuclear fusion as an energy source and research progress in this area are summarized. The current state of the art is described. Laser fusion, inertial confinement fusion, and magnetic fusion (the tokamak) are explained, the latter in some detail. Remaining problems and planned future reactors are considered. They are the Compact Ignition Tokamak (CIT), the International Thermonuclear

T. K. Fowler

1989-01-01

41

Motor Starters  

NASA Technical Reports Server (NTRS)

The power factor controller (PFC) was invented by a NASA engineer. It matches voltage with a motor's actual need by sensing shifts in the relationship between voltage and current flow. With the device, power can be trimmed as much as 65%. Intellinet adopted this technology and designed "soft start" and "load-responsive" control modes to start engines gradually and recycle voltage without reducing motor speed. Other features are lower motor heat and faster fault identification.

1986-01-01

42

Acquired methemoglobinemia revisited.  

PubMed

Dentistry has two medications in its pain management armamentarium that may cause the potentially life-threatening disorder methemoglobinemia. The first medications are the topical local anesthetics benzocaine and prilocaine. The second medication is the injectable local anesthetic prilocaine. Acquired methemoglobinemia remains a source of morbidity and mortality in dental and medical patients despite the fact that it is better understood now than it was even a decade ago. It is in the interest of all dental patients that their treating dentists review this disorder. The safety of dental patients mandates professional awareness. PMID:20831930

Trapp, Larry; Will, John

2010-10-01

43

Fault classification for induction motor using Hilbert-based bispectral analysis and probabilistic neural networks  

Microsoft Academic Search

This paper addresses the development of a new sig- nal processing approach based on the fusion of Hilbert transform and bispectral analysis to extract features of defects in a number of induction motor conditions. The motor conditions considered are a normal motor and motors with outer, inner race and rotor faults. The signal processing techniques based on Hilbert transform have

D.-M. Yang

2011-01-01

44

Understanding task- and expertise-specific motor acquisition and motor memory formation and consolidation.  

PubMed

This study aimed to assess how the capacity to acquire, form and consolidate motor memories might vary across different tasks and different groups (with and without motor expertise). 20 athletes and 21 non-athletes were tested on five motor tasks: a motor sequence task, a reaction time task, two visuo-manual tasks, and a balance task. Performance was measured before training (T0), immediately after training (T1), and 24 hours after training (T2), to assess motor acquisition and motor memory formation and consolidation. T2 performance was higher in both groups, without additional training, on the motor sequence task, reaction time task and one of the visuo-manual tasks (Pouring Task). Athletes had better baseline performance at TO than non-athletes on these tasks. Findings suggest that differential formation and consolidation processes underlie different motor tasks. Although athletes did not outperform non-athletes on motor memory consolidation, they were more efficient in acquiring novel tasks, perhaps because the required motor schemas might have been based on previously acquired ones. PMID:24422343

Pereira, Tiago; Abreu, Ana Maria; Castro-Caldas, Alexandre

2013-08-01

45

Naturally acquired microchimerism  

PubMed Central

Bi-directional transplacental trafficking occurs routinely during the course of normal pregnancy, from fetus to mother and from mother to fetus. In addition to a variety of cell-free substances, it is now well recognized that some cells are also exchanged. Microchimerism refers to a small number of cells (or DNA) harbored by one individual that originated in a genetically different individual. While microchimerism can be the result of iatrogenic interventions such as transplantation or transfusion, by far the most common source is naturally acquired microchimerism from maternal-fetal trafficking during pregnancy. Microchimerism is a subject of much current interest for a number of reasons. During pregnancy, fetal microchimerism can be sought from the mother’s blood for the purpose of prenatal diagnosis. Moreover, studies of fetal microchimerism during pregnancy may offer insight into complications of pregnancy, such as preeclampsia, as well as insights into the pathogenesis of autoimmune diseases such as rheumatoid arthritis which usually ameliorates during pregnancy. Furthermore, it is now known that microchimerism persists decades later, both fetal microchimerism in women who have been pregnant and maternal microchimerism in her progeny. Investigation of the long-term consequences of fetal and maternal microchimerism is another exciting frontier of active study, with initial results pointing both to adverse and beneficial effects. This review will provide an overview of microchimerism during pregnancy and of current knowledge regarding long-term effects of naturally acquired fetal and maternal microchimerism. PMID:19924635

GAMMILL, HILARY S.; NELSON, J. LEE

2010-01-01

46

Motorized Car  

NSDL National Science Digital Library

In this design challenge activity, learners build a car that uses a battery-operated motor to "drive" at least ten feet. Educators can use this activity as a fun, hands-on way to introduce the design process as well as circuitry and motors to learners.

Wgbh

2010-01-01

47

Motor Bird  

NSDL National Science Digital Library

In this activity, learners build a bird that flies in place with help from a motor, wire, and some straws. This engineering activity introduces learners to circuits and motors, automata, and rotational motion. Note: a drill and drill bit are required for this project, but are not included in the cost of materials.

Workshop, Fresno C.

2011-01-01

48

AC Motors  

NSDL National Science Digital Library

All About Circuits is a website that âÂÂprovides a series of online textbooks covering electricity and electronics.â Written by Tony R. Kuphaldt, the textbooks available here are wonderful resources for students, teachers, and anyone who is interested in learning more about electronics. This specific section, AC Motors, is the thirteenth chapter in Volume II â Alternating Current. A few of the topics covered in this chapter include: Synchronous Motors, Tesla polyphase induction motors; Wound rotor induction motors; and Selsyn (synchro) motors. Diagrams and detailed descriptions of concepts are included throughout the chapter to provide users with a comprehensive lesson. Visitors to the site are also encouraged to discuss concepts and topics using the All About Circuits discussion forums (registration with the site is required to post materials).

Kuphaldt, Tony R.

2008-07-04

49

[Community-acquired pneumonia].  

PubMed

Community-acquired pneumonia (CAP) is the most common form of severe infectious disease in developed countries. The mortality is particularly high in elderly patients. For risk stratification simple clinical scores such as the CRB-65 (confusion, respiratory rate, blood pressure, age over 65 years) are recommended. The spectrum of pathogens is characterized by Pneumococcus and Haemophilus influenzae as well as atypical and viral pathogens. Resistance plays a subordinate role in Germany. In addition to the clinical symptoms an X-ray examination is also helpful to confirm the diagnosis and biomarkers can also be useful. Microbiological investigations are not necessary in practice. Particularly in cases of uncharacteristic clinical symptoms and therapy failure there are many differential diagnoses which can be hidden behind the clinical diagnosis of pneumonia. The calculated treatment of CAP should correspond to the current recommendations in national guidelines. The options for prevention by general measures and vaccinations should be applied consistently. PMID:21837506

Dalhoff, K

2011-09-01

50

A Total Variation Based Algorithm for Pixel Level Image Fusion  

E-print Network

1 A Total Variation Based Algorithm for Pixel Level Image Fusion Mrityunjay Kumar *, Student Member variation (TV) based approach is proposed for pixel level fusion to fuse images acquired using multiple of image fusion is to extract information from input images such that the fused image provides better

Dass, Sarat C.

51

Nuclear fusion  

SciTech Connect

The advantages of nuclear fusion as an energy source and research progress in this area are summarized. The current state of the art is described. Laser fusion, inertial confinement fusion, and magnetic fusion (the tokamak) are explained, the latter in some detail. Remaining problems and planned future reactors are considered. They are the compact ignition tokamak (CIT), the international thermonuclear experimental reactor (ITER), and TIBER II. The design of the latter is shown.

Fowler, T.K. (Dept. of Nuci. Eng., California Univ., Berkeley, CA (US))

1989-05-01

52

Expression of NR2B in Cerebellar Granule Cells Specifically Facilitates Effect of Motor Training on Motor Learning  

Microsoft Academic Search

It is believed that gene\\/environment interaction (GEI) plays a pivotal role in the development of motor skills, which are acquired via practicing or motor training. However, the underlying molecular\\/neuronal mechanisms are still unclear. Here, we reported that the expression of NR2B, a subunit of NMDA receptors, in cerebellar granule cells specifically enhanced the effect of voluntary motor training on motor

Jianwei Jiao; Akira Nakajima; William G. M. Janssen; Vytautas P. Bindokas; Xiaoli Xiong; John H. Morrison; James R. Brorson; Ya-Ping Tang; Martin Giurfa

2008-01-01

53

Fusion Basics  

NSDL National Science Digital Library

This website from the Princeton Plasma Physics Laboratory provides background information about fusion. Different sections cover fusion reactions, plasma heating, and how a fusion power plant would work. In addition, the site offers links to research projects at the Princeton Plasma Physics Laboratory.

2009-11-05

54

Stepper motor  

NASA Technical Reports Server (NTRS)

The purpose of this document is to describe the more commonly used permanent magnet stepper motors for spaceflight. It will discuss the mechanical and electrical aspects of the devices, their torque behavior, those parameters which need to be controlled and measured, and test methods to be employed. It will also discuss torque margins, compare these to the existing margin requirements, and determine the applicability of these requirements. Finally it will attempt to generate a set of requirements which will be used in any stepper motor procurement and will fully characterize the stepper motor behavior in a consistent and repeatable fashion.

Dekramer, Cornelis

1994-01-01

55

Motor Controller  

NASA Technical Reports Server (NTRS)

M.H. Marks Enterprises' Power Factor Controller (PFC) matches voltage with motor's actual need. Plugged into a motor, PFC continuously determines motor load by sensing shifts between voltage and current flow. When it senses a light load, it cuts voltage to the minimum needed. It offers potential energy savings ranging from eight percent up to 65 percent depending on the application. Myles Marks started out with the notion of writing an article for Popular Electronics magazine at the same time offering to furnish kits to readers interested in assembling PFC's. Within two weeks from publication he had orders for 500 kits and orders are still coming three years later.

1988-01-01

56

Molecular motors and their functions in plants  

NASA Technical Reports Server (NTRS)

Molecular motors that hydrolyze ATP and use the derived energy to generate force are involved in a variety of diverse cellular functions. Genetic, biochemical, and cellular localization data have implicated motors in a variety of functions such as vesicle and organelle transport, cytoskeleton dynamics, morphogenesis, polarized growth, cell movements, spindle formation, chromosome movement, nuclear fusion, and signal transduction. In non-plant systems three families of molecular motors (kinesins, dyneins, and myosins) have been well characterized. These motors use microtubules (in the case of kinesines and dyneins) or actin filaments (in the case of myosins) as tracks to transport cargo materials intracellularly. During the last decade tremendous progress has been made in understanding the structure and function of various motors in animals. These studies are yielding interesting insights into the functions of molecular motors and the origin of different families of motors. Furthermore, the paradigm that motors bind cargo and move along cytoskeletal tracks does not explain the functions of some of the motors. Relatively little is known about the molecular motors and their roles in plants. In recent years, by using biochemical, cell biological, molecular, and genetic approaches a few molecular motors have been isolated and characterized from plants. These studies indicate that some of the motors in plants have novel features and regulatory mechanisms. The role of molecular motors in plant cell division, cell expansion, cytoplasmic streaming, cell-to-cell communication, membrane trafficking, and morphogenesis is beginning to be understood. Analyses of the Arabidopsis genome sequence database (51% of genome) with conserved motor domains of kinesin and myosin families indicates the presence of a large number (about 40) of molecular motors and the functions of many of these motors remain to be discovered. It is likely that many more motors with novel regulatory mechanisms that perform plant-specific functions are yet to be discovered. Although the identification of motors in plants, especially in Arabidopsis, is progressing at a rapid pace because of the ongoing plant genome sequencing projects, only a few plant motors have been characterized in any detail. Elucidation of function and regulation of this multitude of motors in a given species is going to be a challenging and exciting area of research in plant cell biology. Structural features of some plant motors suggest calcium, through calmodulin, is likely to play a key role in regulating the function of both microtubule- and actin-based motors in plants.

Reddy, A. S.

2001-01-01

57

Developmental and acquired dyslexias.  

PubMed

Marshall (1984) highlighted potential parallels between children with developmental disorders of reading and adults who had acquired reading disorders. He advocated the use of a cognitive neuropsychological framework in the investigation of children with developmental abnormalities of cognition, including those with developmental dyslexias. Developmental phonological dyslexia has been extensively described and is a pervasive disorder. The relationship between reading difficulty and phonological difficulties evident in explicit oral phonological tasks continues to be a focus for debate. Clear cases of developmental deep dyslexia have now been described and the syndrome has also been described as characterising early reading development in Williams syndrome (WS), where there are also semantic errors in other domains, including naming and receptive vocabulary and there may be a generalised difficulty with the activation of fine grain semantic specifications. In the domain of number, highly selective reading disorders characterised by high rates of semantic errors have been documented, indicating that semantic reading errors can be domain-specific. They can occur to number words despite intact ability to read Arabic numbers and they can occur to Arabic numbers and number words despite intact ability to read words in other domains. Current models of reading written words do not allow for such material-specific dissociation. Developmental surface dyslexia has also been described in a range of countries, languages and orthographies. Descriptions of cases for whom there is no phonological impairment in reading have generated contrary evidence for theories suggesting that phonological impairment underlies all developmental dyslexia. As reading develops in Williams Syndrome, phonological reading skills may improve with over-reliance on these leading to surface dyslexia. Surface dyslexia has also been reported in cases of developmental amnesia in which there are semantic memory impairments. Hyperlexia can take several forms including broad hyperdevelopment with elevated phonological reading abilities, lexico-semantic reading abilities and reading comprehension as in Turner's syndrome (TS). This advantage has early onset in school-starters. These specific modular effects do not have pervasive impact across systems but demonstrate the limitations of functional plasticity in developmental and genetic disorders. The framework Marshall (1984) outlined has provided a foundation for the development of systematic investigation of developmental disorders. PMID:17131596

Temple, Christine M

2006-08-01

58

THE WIDOM-LARSEN THEORY OF COLD FUSION by Martin Bier  

E-print Network

, the nuclear fusion of a proton and a heavy metal nucleus could occur. The theory bombs and nuclear power plants. Newly acquired insights in the behavior and started to construct models to explain the alleged cold nuclear fusion

Bier, Martin

59

Fusion breeder  

SciTech Connect

The fusion breeder is a fusion reactor designed with special blankets to maximize the transmutation by 14 MeV neutrons of uranium-238 to plutonium or thorium to uranium-233 for use as a fuel for fission reactors. Breeding fissile fuels has not been a goal of the US fusion energy program. This paper suggests it is time for a policy change to make the fusion breeder a goal of the US fusion program and the US nuclear energy program. The purpose of this paper is to suggest this policy change be made and tell why it should be made, and to outline specific research and development goals so that the fusion breeder will be developed in time to meet fissile fuel needs.

Moir, R.W.

1982-04-20

60

Fusion breeder  

SciTech Connect

The fusion breeder is a fusion reactor designed with special blankets to maximize the transmutation by 14 MeV neutrons of uranium-238 to plutonium or thorium to uranium-233 for use as a fuel for fission reactors. Breeding fissile fuels has not been a goal of the US fusion energy program. This paper suggests it is time for a policy change to make the fusion breeder a goal of the US fusion program and the US nuclear energy program. The purpose of this paper is to suggest this policy change be made and tell why it should be made, and to outline specific research and development goals so that the fusion breeder will be developed in time to meet fissile fuel needs.

Moir, R.W.

1982-02-22

61

Motor assessment of developing common marmosets.  

PubMed

Motor development has been extensively studied in human infants and children, with several established scales for the evaluation of motor functions. However, the study of the neuronal mechanisms underlying human motor development is hampered by the lack of good animal models. The common marmoset (Callithrix jacchus), a small New World monkey, has recently attracted much attention as a potential nonhuman primate model for understanding human physiology and diseases. However, little is known about its gross motor development. In the present study, we found that marmosets have a critical period for motor development in postnatal weeks 2 to 5, and acquire most of their motor skills by 8 weeks of age. We also developed methods to assess their motor functions, which will be useful for the evaluation of motor performance in marmoset models of human diseases. In addition, we found that marmosets exhibit a "head-to-tail" sequence of motor development similar to that found in humans, further supporting the notion that they provide a good animal model for studying the neuronal mechanisms underlying human motor development. PMID:24395453

Wang, Yiwen; Fang, Qin; Gong, Neng

2014-06-01

62

Acquiring and Organizing Curriculum Materials.  

ERIC Educational Resources Information Center

This book addresses two areas of need in a curriculum materials center--where to find curriculum materials for acquisition and how to organize these materials for efficient and effective access once they are acquired. The book is arranged in two parts: "Acquiring and Organizing the Collection" and "Resources." The book brings together many…

Lare, Gary A.

63

HLA Profile in Acquired Hemophilia  

Microsoft Academic Search

The DR16 and DQB0502 alleles were more frequent in acquired hemophilia A than in the normal population. Although not statistically significant, the HLA profile in acquired hemophilia A gains importance because of its antipodal expression compared to inhibitors in inherited hemophilia A.

J. Oldenburg; A. Pavlova; J. Schröder; H. Brackmann; W. Effenberger; R. Zimmermann; A. Huth-Kühne; I. Scharrer; R. Grossmann; E. Seifried; C. Seidl

64

"Polarized" Fusion  

NASA Astrophysics Data System (ADS)

Increasing energy demand in view of limited supply, as well as environmental and nuclear-safety concerns leading to increased emphasis on renewable energy sources such as solar or wind energy are expected to focus public and scientific interest increasingly also on fusion energy. With the decision to build ITER (low-density magnetic confinement) and also continuing research on (high-density) inertial-confinement fusion (cf. the inauguration of the laser fusion facility at the Lawrence Livermore National Laboratory) prospects of fusion energy have probably entered a new era.

Schieck, Hans Paetz Gen.

65

Fusion Implementation  

SciTech Connect

If a fusion DEMO reactor can be brought into operation during the first half of this century, fusion power production can have a significant impact on carbon dioxide production during the latter half of the century. An assessment of fusion implementation scenarios shows that the resource demands and waste production associated with these scenarios are manageable factors. If fusion is implemented during the latter half of this century it will be one element of a portfolio of (hopefully) carbon dioxide limiting sources of electrical power. It is time to assess the regional implications of fusion power implementation. An important attribute of fusion power is the wide range of possible regions of the country, or countries in the world, where power plants can be located. Unlike most renewable energy options, fusion energy will function within a local distribution system and not require costly, and difficult, long distance transmission systems. For example, the East Coast of the United States is a prime candidate for fusion power deployment by virtue of its distance from renewable energy sources. As fossil fuels become less and less available as an energy option, the transmission of energy across bodies of water will become very expensive. On a global scale, fusion power will be particularly attractive for regions separated from sources of renewable energy by oceans.

J.A. Schmidt

2002-02-20

66

Motor Controllers  

NASA Technical Reports Server (NTRS)

Kollmorgen Corporation's Mermaid II two person submersible is propeller-driven by a system of five DC brushless motors with new electronic controllers that originated in work performed in a NASA/DOE project managed by Lewis Research Center. A key feature of the system is electric commutation rather than mechanical commutation for converting AC current to DC.

1984-01-01

67

Motor oil  

NSDL National Science Digital Library

Motor oil can be recycled and reused, cutting down on our foreign oil dependence. It can also contaminate drinking water and harm beach shore sand, as well as birds. Birds covered in oil cannot fly again until all the oil is washed off.

N/A N/A (None;)

2007-02-11

68

Premium Efficient Motors  

E-print Network

Premium efficient motors are available which convert electrical energy into mechanical energy with fewer losses than the more standard motors. The fewer losses in these motors are due to changes in the motor design and improved manufacturing methods...

Moser, P. R.

1984-01-01

69

Assisted fusion  

E-print Network

A model of nuclear fusion consisting of a wave packet impinging into a well located between square one dimensional barriers is treated analytically. The wave function inside the well is calculated exactly for the assisted tunneling induced by a perturbation mimicking a constant electric field with arbitrary time dependence. Conditions are found for the enhancement of fusion.

German Kälbermann

2009-10-19

70

Image fusion  

NASA Technical Reports Server (NTRS)

The topics covered include the following: a system overview of the basic components of a system designed to improve the ability of a pilot to fly through low-visibility conditions such as fog; the role of visual sciences; fusion issues; sensor characterization; sources of information; image processing; and image fusion.

Pavel, M.

1993-01-01

71

Hospital-acquired pneumonia (image)  

MedlinePLUS

Pneumonia acquired in the hospital is a very serious infection because the patient's defense mechanisms are often impaired by illness, and the infecting organisms are more dangerous than the ones generally encountered in the community.

72

Sequential neural changes during motor learning in schizophrenia  

Microsoft Academic Search

Positron emission tomography (PET) was used to investigate differences in neural plasticity associated with learning a unique motor task in patients with schizophrenia and healthy volunteers. Working with a robotic manipulandum, subjects learned reaching movements in a force field. Visual cues were provided to guide the reaching movements. PET rCBF measures were acquired while participants learned the motor skill over

Laura M. Rowland; Reza Shadmehr; Dwight Kravitz; Henry H. Holcomb

2008-01-01

73

Latent Structure of Motor Abilities in Pre-School Children  

ERIC Educational Resources Information Center

The theoretical and practical knowledge which have so far been acquired through work with pre-school children pointed to the conclusion that the structures of the latent dimensions of the motor abilities differ greatly from such a structure, in pre-school children and adults alike. Establishing the latent structure of the motor abilities in…

Vatroslav, Horvat

2011-01-01

74

Expression of NR2B in Cerebellar Granule Cells Specifically Facilitates Effect of Motor Training on Motor Learning  

PubMed Central

It is believed that gene/environment interaction (GEI) plays a pivotal role in the development of motor skills, which are acquired via practicing or motor training. However, the underlying molecular/neuronal mechanisms are still unclear. Here, we reported that the expression of NR2B, a subunit of NMDA receptors, in cerebellar granule cells specifically enhanced the effect of voluntary motor training on motor learning in the mouse. Moreover, this effect was characterized as motor learning-specific and developmental stage-dependent, because neither emotional/spatial memory was affected nor was the enhanced motor learning observed when the motor training was conducted starting at the age of 3 months old in these transgenic mice. These results indicate that changes in the expression of gene(s) that are involved in regulating synaptic plasticity in cerebellar granule cells may constitute a molecular basis for the cerebellum to be involved in the GEI by facilitating motor skill learning. PMID:18301761

Jiao, Jianwei; Nakajima, Akira; Janssen, William G. M.; Bindokas, Vytautas P.; Xiong, Xiaoli; Morrison, John H.; Brorson, James R.; Tang, Ya-Ping

2008-01-01

75

Gene Expression Changes in the Motor Cortex Mediating Motor Skill Learning  

PubMed Central

The primary motor cortex (M1) supports motor skill learning, yet little is known about the genes that contribute to motor cortical plasticity. Such knowledge could identify candidate molecules whose targeting might enable a new understanding of motor cortical functions, and provide new drug targets for the treatment of diseases which impair motor function, such as ischemic stroke. Here, we assess changes in the motor-cortical transcriptome across different stages of motor skill acquisition. Adult rats were trained on a gradually acquired appetitive reach and grasp task that required different strategies for successful pellet retrieval, or a sham version of the task in which the rats received pellet reward without needing to develop the reach and grasp skill. Tissue was harvested from the forelimb motor-cortical area either before training commenced, prior to the initial rise in task performance, or at peak performance. Differential classes of gene expression were observed at the time point immediately preceding motor task improvement. Functional clustering revealed that gene expression changes were related to the synapse, development, intracellular signaling, and the fibroblast growth factor (FGF) family, with many modulated genes known to regulate synaptic plasticity, synaptogenesis, and cytoskeletal dynamics. The modulated expression of synaptic genes likely reflects ongoing network reorganization from commencement of training till the point of task improvement, suggesting that motor performance improves only after sufficient modifications in the cortical circuitry have accumulated. The regulated FGF-related genes may together contribute to M1 remodeling through their roles in synaptic growth and maturation. PMID:23637843

Cheung, Vincent C. K.; DeBoer, Caroline; Hanson, Elizabeth; Tunesi, Marta; D'Onofrio, Mara; Arisi, Ivan; Brandi, Rossella; Cattaneo, Antonino; Goosens, Ki A.

2013-01-01

76

Fusion Simulation  

NSDL National Science Digital Library

In this activity, kids are able to see with their own eyes how fusion works. The simple experiment requires only Velcro and two strong magnets.The activity begins with a brief overview that introduces students to the science they are about to see. Then, the procedure is laid out in simple step-by-step directions. The activity ends with an explanation that gives students a deeper understanding of how what they've just witnessed relates to fusion.

77

Motor Effect  

NSDL National Science Digital Library

In this activity about electricity and magnetism, learners examine what happens when a magnet exerts a force on a current-carrying wire. Using a simple device, learners discover that when an electrical current flows through a magnetic field, a force is exerted on the current and this force can be used to make an electric motor. Learners will experiment to find out what happens when they reverse the direction of current flow. They will also discover a mathematical tool called the "right-hand rule."

Exploratorium, The

2012-06-26

78

Stuttering Following Acquired Brain Damage: A Review of the Literature  

PubMed Central

Communication problems resulting from acquired brain damage are most frequently manifested as motor speech disorders such as dysarthria, syndromes of aphasia, and impairments of pragmatics. A much less common phenomenon is the onset of stuttering in adults who sustain a stroke, traumatic brain injury, or other neurologic events. When stuttering occurs in association with neuropathology, precise characterization and explanation of observed behaviors is often difficult. Among the clinical challenges presented by acquired stuttering are the problem of distinguishing this form of dysfluency from those associated with dysarthria and aphasia, and identifying the neuropathological condition(s) and brain lesion site(s) giving rise to this speech disorder. Another challenge to the precise characterization of acquired stuttering is the fact that some cases of acquired stuttering apparently have a psychological or neuropsychiatric genesis rather than a neuropathological one. In this paper we provide a review of the literature pertaining to the complicated phenomenon of acquired stuttering in adults and draw some tentative explanatory conclusions regarding this disorder. PMID:20628582

Lundgren, Kristine; Helm-Estabrooks, Nancy; Klein, Reva

2009-01-01

79

The neural correlates of learned motor acuity.  

PubMed

We recently defined a component of motor skill learning as "motor acuity," quantified as a shift in the speed-accuracy trade-off function for a task. These shifts are primarily driven by reductions in movement variability. To determine the neural correlates of improvement in motor acuity, we devised a motor task compatible with magnetic resonance brain imaging that required subjects to make finely controlled wrist movements under visual guidance. Subjects were imaged on day 1 and day 5 while they performed this task and were trained outside the scanner on intervening days 2, 3, and 4. The potential confound of performance changes between days 1 and 5 was avoided by constraining movement time to a fixed duration. After training, subjects showed a marked increase in success rate and a reduction in trial-by-trial variability for the trained task but not for an untrained control task, without changes in mean trajectory. The decrease in variability for the trained task was associated with increased activation in contralateral primary motor and premotor cortical areas and in ipsilateral cerebellum. A global nonlocalizing multivariate analysis confirmed that learning was associated with increased overall brain activation. We suggest that motor acuity is acquired through increases in the number of neurons recruited in contralateral motor cortical areas and in ipsilateral cerebellum, which could reflect increased signal-to-noise ratio in motor output and improved state estimation for feedback corrections, respectively. PMID:24848466

Shmuelof, Lior; Yang, Juemin; Caffo, Brian; Mazzoni, Pietro; Krakauer, John W

2014-08-15

80

Implementing Motor Decision Plans  

E-print Network

The first step to reducing energy costs and increasing reliability in motors is to establish a motor plan. A motor plan allows decisions to be made in advance of motor failure, and increases the options available. By contrast, most motor decisions...

Elliott, R. N.

81

RSNA 2002: Image Fusion Image Fusion  

E-print Network

RSNA 2002: Image Fusion Image Fusion: Introduction to the Technology Charles A. Pelizzari, Ph.D. Department of Radiation and Cellular Oncology The University of Chicago #12;RSNA 2002: Image Fusion "Fusion and limitations) ·Where do we need to go? (future directions) #12;RSNA 2002: Image Fusion Terminology

Pelizzari, Charles A.

82

Fracto-fusion. Mechanism of cold fusion  

Microsoft Academic Search

As a cold fusion mechanism, a fracto-fusion was investigated by which reacting particles are accelerated by the electric field generated between the crack surfaces in a crystal and the beam fusion occurs. By assuming the possible magnitude of the potential difference the fusion rate and energy multiplication factor were calculated. These results are consistent with cold fusion experiments. On the

Tatsuoki Takeda; Tomonori Takizuka

1989-01-01

83

Phylogenetically Acquired Representations and Hybrid Evolutionary Algorithms  

E-print Network

information by introducing inheritance of acquired traits and Horizontal Gene Transfer, a good tool for handlePhylogenetically Acquired Representations and Hybrid Evolutionary Algorithms Adrianna Wozniak to avoid the Symbol Grounding Problem. We give a definition of Phylogenetically Acquired Representations

Paris-Sud XI, Université de

84

Diagnosis and treatment of chronic acquired demyelinating polyneuropathies.  

PubMed

Chronic neuropathies are operationally classified as primarily demyelinating or axonal, on the basis of electrodiagnostic or pathological criteria. Demyelinating neuropathies are further classified as hereditary or acquired-this distinction is important, because the acquired neuropathies are immune-mediated and, thus, amenable to treatment. The acquired chronic demyelinating neuropathies include chronic inflammatory demyelinating polyneuropathy (CIDP), neuropathy associated with monoclonal IgM antibodies to myelin-associated glycoprotein (MAG; anti-MAG neuropathy), multifocal motor neuropathy (MMN), and POEMS syndrome. They have characteristic--though overlapping--clinical presentations, are mediated by distinct immune mechanisms, and respond to different therapies. CIDP is the default diagnosis if the neuropathy is demyelinating and no other cause is found. Anti-MAG neuropathy is diagnosed on the basis of the presence of anti-MAG antibodies, MMN is characterized by multifocal weakness and motor conduction blocks, and POEMS syndrome is associated with IgG or IgA ?-type monoclonal gammopathy and osteosclerotic myeloma. The correct diagnosis, however, can be difficult to make in patients with atypical or overlapping presentations, or nondefinitive laboratory studies. First-line treatments include intravenous immunoglobulin (IVIg), corticosteroids or plasmapheresis for CIDP; IVIg for MMN; rituximab for anti-MAG neuropathy; and irradiation or chemotherapy for POEMS syndrome. A correct diagnosis is required for choosing the appropriate treatment, with the aim of preventing progressive neuropathy. PMID:24980070

Latov, Norman

2014-08-01

85

Myopathy in acquired partial lipodystrophy  

Microsoft Academic Search

We describe two women with acquired partial lipodystrophy, one with significant myopathic symptoms and signs. Muscle biopsy of deltoid and quadriceps was performed in each case. The light microscopy findings were of type 1 and type 2 fibre hypertrophy, with an increase in intracytoplasmic fat in both cases. Electron microscopy showed normal fibres, with accumulations of electron-lucent fat droplets between

Richard W. Orrell; Richard C. Peatfield; Carole E. Collins; David F. Woodrow; Jill Moss

1995-01-01

86

Acquired Equivalence Changes Stimulus Representations  

ERIC Educational Resources Information Center

Acquired equivalence is a paradigm in which generalization is increased between two superficially dissimilar stimuli (or antecedents) that have previously been associated with similar outcomes (or consequents). Several possible mechanisms have been proposed, including changes in stimulus representations, either in the form of added associations or…

Meeter, M.; Shohamy, D.; Myers, C. E.

2009-01-01

87

Biometric liveness detection based on cross modal fusion  

Microsoft Academic Search

In this paper we propose liveness checking technique for multimodal biometric authentication systems based on audio-visual cross-modal fusion. Liveness checking ensures that biometric cues are acquired from a live person who is actually present at the time of capture for authenticating the identity. The liveness check based on mutual dependency models is performed by fusion of acoustic and visual speech

Girija Chetty

2009-01-01

88

Data fusion for the detection of buried land mines  

SciTech Connect

The authors conducted experiments to demonstrate the enhanced delectability of buried land mines using sensor fusion techniques. Multiple sensors, including imagery, infrared imagery, and ground penetrating radar, have been used to acquire data on a number of buried mines and mine surrogates. The authors present this data along with a discussion of the application of sensor fusion techniques for this particular detection problem. The authors describe the data fusion architecture and discuss some relevant results of these classification methods.

Clark, G.A.; Sengupta, S.K.; Schaich, P.C.; Sherwood, R.J.; Buhl, M.R.; Hernandez, J.E.; Kane, R.J.; Barth, M.J.; Fields, D.J.; Carter, M.R.

1993-10-01

89

Gross motor control  

MedlinePLUS

Gross motor control is the ability to make large, general movements (such as waving an arm or lifting a ... Gross motor control is a milestone in the development of an infant. Infants develop gross motor control before they ...

90

Multifocal Motor Neuropathy  

MedlinePLUS

... Enhancing Diversity Find People About NINDS NINDS Multifocal Motor Neuropathy Information Page Table of Contents (click to ... being done? Clinical Trials Organizations What is Multifocal Motor Neuropathy? Multifocal motor neuropathy is a progressive muscle ...

91

Cold fusion: Alchemist's dream  

Microsoft Academic Search

In this report the following topics relating to cold fusion are discussed: muon catalyzed cold fusion; piezonuclear fusion; sundry explanations pertaining to cold fusion; cosmic ray muon catalyzed cold fusion; vibrational mechanisms in excited states of D2 molecules; barrier penetration probabilities within the hydrogenated metal lattice\\/piezonuclear fusion; branching ratios of D2 fusion at low energies; fusion of deuterons into He-4;

E. D. Clayton

1989-01-01

92

Energy Efficient Motors  

E-print Network

on the selection and use of motors. These publications [1,2J are recommended reading for those interested in under standing motor selection. I will limit my discus sion to induction motors, although much of what I say also pertains to synchronous motors or DC... on the selection and use of motors. These publications [1,2J are recommended reading for those interested in under standing motor selection. I will limit my discus sion to induction motors, although much of what I say also pertains to synchronous motors or DC...

Hoffmeyer, W.

1982-01-01

93

Hippocampal contribution to early and later stages of implicit motor sequence learning  

Microsoft Academic Search

Implicit motor sequence learning refers to an important human ability to acquire new motor skills through the repeated performance\\u000a of a motor sequence. This learning process is characterized by slow, incremental gains of motor performance. The present fMRI\\u000a study was developed to better delineate the areas supporting these temporal dynamics of learning. By using the serial color\\u000a matching paradigm, our

Freja Gheysen; Filip Van Opstal; Chantal Roggeman; Hilde Van Waelvelde; Wim Fias

2010-01-01

94

The inhibition of acquired fear  

Microsoft Academic Search

A conditioned stimulus (CS) associated with a fearsome unconditioned stimulus (US) generates learned fear. Acquired fear is\\u000a at the root of a variety of disorders, among which are phobias, generalized anxiety, and the posttraumatic stress disorder\\u000a (PTSD). The simplest way to inhibit learned fear is to extinguish it, which is usually done by repeatedly presenting the CS\\u000a alone, so that

Iván Izquierdo; Martín Cammarota; Mónica R. M. Vianna; Lía R. M. Bevilaqua

2004-01-01

95

Engelhard acquires German catalyst maker  

SciTech Connect

Engelhard will acquire the precious- and base-metal catalyst businesses of Doduco GmbH & Co. (Pforzheim, Germany), a privately held supplier of catalysts to the chemical and pharmaceutical industries. {open_quotes}This is an excellent product expansion for us, one that we believe can be leveraged throughout Europe and, later, globally,{close_quotes} says James A. Martin, group v.p., president, and general manager of Engelhard`s chemical catalysts group.

NONE

1996-10-16

96

Hereditary and acquired amyloid neuropathies  

Microsoft Academic Search

Amyloid neuropathies occur in a context of hereditary (FAP) or acquired amyloidosis. They present usually as severe and progressive\\u000a polyneuropathy and carry a poor prognosis. Most FAP are associated with endoneurial deposits of variant transthyretin (TTR)\\u000a with substitution of one aminoacid and are secondary to a point mutation of the TTR gene. Portugal is the main endemic area\\u000a of TTR-FAP,

David Adams

2001-01-01

97

Cold fusion, Alchemist's dream  

SciTech Connect

In this report the following topics relating to cold fusion are discussed: muon catalysed cold fusion; piezonuclear fusion; sundry explanations pertaining to cold fusion; cosmic ray muon catalysed cold fusion; vibrational mechanisms in excited states of D{sub 2} molecules; barrier penetration probabilities within the hydrogenated metal lattice/piezonuclear fusion; branching ratios of D{sub 2} fusion at low energies; fusion of deuterons into {sup 4}He; secondary D+T fusion within the hydrogenated metal lattice; {sup 3}He to {sup 4}He ratio within the metal lattice; shock induced fusion; and anomalously high isotopic ratios of {sup 3}He/{sup 4}He.

Clayton, E.D.

1989-09-01

98

Gross Motor Development.  

ERIC Educational Resources Information Center

The document is designed to help teachers identify and remediate gross motor development deficits in elementary school students. A definition of gross motor development and a checklist of gross motor skills are provided. Sections cover the following topics: successful teaching techniques; activities for perceptual-motor training; activities for…

Florida Learning Resources System/CROWN, Jacksonville.

99

Investigating motors and magnetism.  

NSDL National Science Digital Library

This activity is an activity where students build a motor, learn motor operation and theory, interpret their understanding through troubleshooting, and develop a new, experimental question related to the motor. One follow-up activity would be coupling their motor to a fan blade or other axle to convert electrical energy to magnetic energy into mechanical motion for real world application.

Reierson, David

100

Cold fusion: muon-catalysed fusion  

Microsoft Academic Search

The authors put into perspective and further develop their recent work in muon catalysed fusion, with the objective of identifying the key physical processes in the t(d,n) alpha fusion cycle relevant to energy related applications. They begin by discussing the fusion cycle and point out the importance of direct nuclear reactions in the catalysed fusion processes. This is followed by

H. E. Rafelski; D. Harley; G. R. Shin; J. Rafelski

1991-01-01

101

Exploring the Use of Cognitive Intervention for Children with Acquired Brain Injury  

ERIC Educational Resources Information Center

Introduction: Children with acquired brain injury (ABI) often experience cognitive, motor, and psychosocial deficits that affect participation in everyday activities. Cognitive Orientation to Daily Occupational Performance (CO-OP) is an individualized treatment that teaches cognitive strategies necessary to support successful performance.…

Missiuna, Cheryl; DeMatteo, Carol; Hanna, Steven; Mandich, Angela; Law, Mary; Mahoney, William; Scott, Louise

2010-01-01

102

Infrared and color visible image fusion system based on luminance-contrast transfer technique  

NASA Astrophysics Data System (ADS)

In this paper, an infrared and color image fusion algorithm based on luminance-contrast transfer technique is presented. This algorithm shall operate YCbCr transform on color visible image, and obtain the luminance component. Then, the grey-scale image fusion methods are utilized to fuse the luminance component of visible and infrared images to acquire grey-scale fusion image. After that, the grey-scale fusion image and visible image are fused to form color fusion image based on inversed YCbCr transform. To acquire better details appearance, a natural-sense color transfer fusion algorithm based on reference image is proposed. Furthermore, a real-time infrared/visible image fusion system based on FPGA is realized. Finally, this design and achievement is verified experimentally, and the experimental results show that the system can produce a color fusion image with good image quality and real-time performance.

Wang, Bo; Gong, Wenfeng; Wang, Chensheng

2012-12-01

103

Nuclear Fusion  

NSDL National Science Digital Library

This simple and engaging astronomy activity explains nuclear fusion and how radiation is generated by stars, using marshmallows as a model. Learners will explore what cosmic radiation is and where it comes from, and how the elements in the universe are generated. The PDF contains step-by-step instructions, photos, presentation tips, links to background information, and a printable Periodic Table of the Elements.

Pacific, Astronomical S.

2008-01-01

104

Pruritic acquired nevus of Ota.  

PubMed

Nevus of Ota is a unilateral, asymptomatic cutaneous and mucosal hyperpigmentation of the face that is congenital or may appear during childhood. We present a case of symptomatic acquired nevus of Ota in an adult, associated with intense pruritus, not described in the literature so far. A 32-year-old woman presented with brownish mottled macules which appeared on her face progressively over 8 days, following the distribution of the first and second divisions of the left trigeminal nerve and partially covering the iris and sclera of the left eye. She reported an intense pruritus in this area. We performed a biopsy on the left forehead, which confirmed the diagnosis of nevus of Ota. Specific stains and immunohistochemistry revealed increased numbers of mast cells. Ophthalmological tests showed acute acquired melanocytosis of the left iris and sclera. The origin of the nevus is still unclear. Several hypotheses suggest a reactivation of melanocytes during their migration from the neural crest. The pruritus reported in our patient may be explained by the increased quantity of mast cells observed in the lesion and/or neuronal stimulation of the ophthalmic and maxillary divisions of the fifth cranial nerve. PMID:24060704

Quenan, S; Strueven, V; Saxer, N; Laffitte, E; Kaya, G; Krischer, J; Hafezi, F; Le Gal, F-A

2013-01-01

105

Foodborne listeriosis acquired in hospitals.  

PubMed

Listeriosis is characterized by bacteremia or meningitis. We searched for listeriosis case series and outbreak investigations published in English by 2013, and assessed the strength of evidence for foodborne acquisition among patients who ate hospital food. We identified 30 reports from 13 countries. Among the case series, the median proportion of cases considered to be hospital-acquired was 25% (range, 9%-67%). The median number of outbreak-related illnesses considered to be hospital-acquired was 4.0 (range, 2-16). All patients were immunosuppressed in 18 of 24 (75%) reports with available data. Eight outbreak reports with strong evidence for foodborne acquisition in a hospital implicated sandwiches (3 reports), butter, precut celery, Camembert cheese, sausage, and tuna salad (1 report each). Foodborne acquisition of listeriosis among hospitalized patients is well documented internationally. The number of listeriosis cases could be reduced substantially by establishing hospital policies for safe food preparation for immunocompromised patients and by not serving them higher-risk foods. PMID:24846635

Silk, Benjamin J; McCoy, Morgan H; Iwamoto, Martha; Griffin, Patricia M

2014-08-15

106

Two cases of acquired methemoglobinemia.  

PubMed

Methemoglobinemia is a rare pathology that results from the oxidation of iron in the hemoglobin molecule. Oxidation of iron switches it from the ferrous to the ferric state, and impedes the ability of hemoglobin to carry oxygen. Hence, methemoglobinemia often results in hypoxemia. The disease can be hereditary or acquired, and its diagnosis can be challenging. This rare condition may often be missed by clinicians, since information on oxygen saturation provided by standard pulse oximeters is unreliable. We here present two cases of acquired methemoglobinemia. The first one is a 24-year old woman, who received dapsone as an alternative antibiotic therapy because of known allergies to a series of other antibiotics and who could not get weaned from mechanical ventilation despite minimal ventilator support. The second case describes a 49-year old man who developed respiratory insufficiency following the use of 'poppers' containing alkyl nitrites. Following treatment of both patients using the antidote methylene blue, they could be successfully weaned from mechanical ventilation. PMID:23136811

Hall, A; Stessel, B; Bergmans, D; Schnabel, R

2012-01-01

107

Acquired duodenal obstruction in children.  

PubMed

Traumatic intramural hematoma of the duodenum is a rare cause of acquired duodenal obstruction in children, and a high degree of suspicion is therefore required to make an early and accurate diagnosis. We report a 6-year-old boy whose epigastrium was impacted by the handlebar of his bicycle during a traffic accident. The boy then experienced epigastralgia. Six days later, progressive bilious vomiting suggestive of gastrointestinal obstruction was noted. Imaging studies revealed a large hematoma extending from the fourth portion of the duodenum to the jejunum. Conservative methods of treatment failed to manage his condition. He underwent laparoscopic surgery to evacuate the hematoma. We also report a case of duodenal obstruction in a previously healthy 2-year-old girl who presented for the first time with acute symptoms of proximal intestinal obstruction. Contrast examinations showed apparent barium retention over the stomach and proximal duodenum. She underwent surgery due to persistent obstruction, and a mushroom-like foreign body was detected embedded in the orifice of the windsock duodenal web. After duodenoduodenostomy and removal of the bezoar, she had a smooth recovery and tolerated feeding well. We conclude that blunt abdominal trauma and incomplete duodenal obstruction, such as that caused by duodenal web, should be considered as possible causes of acquired proximal gastrointestinal obstruction in previously healthy children, despite their rarity. PMID:19133572

Chien, Jen-Hung; Ho, Tsyr-Yuh; Shih-Peng, Lin; Lee, Chi-Ling; Ou, Shan-Fu

2008-10-01

108

7 CFR 926.10 - Acquire.  

Code of Federal Regulations, 2010 CFR

...COLLECTION, REPORTING AND RECORDKEEPING REQUIREMENTS APPLICABLE TO CRANBERRIES NOT SUBJECT TO THE CRANBERRY MARKETING ORDER § 926.10 Acquire. Acquire means to obtain cranberries by any means whatsoever for the purpose of handling...

2010-01-01

109

Homopolar motors and generators. (Latest citations from the INSPEC database). Published Search  

SciTech Connect

The bibliography contains citations concerning design, analysis, construction, testing, and applications of homopolar motors and generators. Energy storage for nuclear fusion and industrial welding facilities is discussed. Applications of homopolar motors in transportation are presented. Topics also include magnetic circuit analysis, superconducting windings, and environmental testing. (Contains a minimum of 58 citations and includes a subject term index and title list.)

Not Available

1994-02-01

110

MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division  

E-print Network

MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division Fusion Magnets Peer Technology & Engineering Division Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10 Science and Fusion Center Fusion Technology & Engineering Division Fusion Magnets Peer Review, MIT Plasma

111

Childhood-onset multifocal motor neuropathy with conduction blocks.  

PubMed

Multifocal motor neuropathy (MMN) is an acquired disorder with onset in adulthood. The authors describe a patient with a slowly progressing distal upper limb motor neuropathy since age 6 years, in whom definite conduction blocks in upper limbs, outside common entrapment sites, and no sensory involvement were consistent with MMN. IV immunoglobulin treatment produced marked muscle strength improvement and conduction block disappearance. MMN diagnosis should also be considered in childhood. PMID:16567714

Moroni, I; Bugiani, M; Ciano, C; Bono, R; Pareyson, D

2006-03-28

112

Cortical Plasticity and Behavioral Recovery Following Focal Lesion to Primary Motor Cortex in Adult Rats  

E-print Network

Acquired brain injuries, such as ischemic stroke and traumatic brain injury, are the leading causes of physical disabilities. Previously, scientists have shown that damage of the primary motor cortex induced neural plasticity in the premotor area...

Nishibe, Mariko

2012-05-31

113

data fusion 15 June 2012  

E-print Network

real world data fusion Fred Daum 15 June 2012 data fusion Copyright © 2012 Raytheon Company. All fusion fusion of measurements performance fusion of tracks interesting parameter 3 #12;real world multi-sensor data fusion fusion of tracks performance fusion of measurements interesting parameter 4 #12;real world

Dobigeon, Nicolas

114

Smart motor technology  

NASA Technical Reports Server (NTRS)

Current spacecraft design relies upon microprocessor control; however, motors usually require extensive additional electronic circuitry to interface with these microprocessor controls. An improved control technique that allows a smart brushless motor to connect directly to a microprocessor control system is described. An actuator with smart motors receives a spacecraft command directly and responds in a closed loop control mode. In fact, two or more smart motors can be controlled for synchronous operation.

Packard, D.; Schmitt, D.

1984-01-01

115

Acquired immunodeficiency syndrome in Romania.  

PubMed

After the initial description of acquired immunodeficiency syndrome (AIDS) in Romania in late 1989, national AIDS case surveillance was established with a modified version of the World Health Organisation (WHO) clinical case definition. This modified case definition requires that AIDS cases have both clinical and serological evidence of human immunodeficiency virus (HIV) infection. Before December, 1989, Romania had reported 13 AIDS cases to WHO. By Dec 31, 1990, 1168 AIDS cases were reported to Romania's Ministry of Health, of which 1094 (93.7%) occurred in children less than 13 years of age at diagnosis. Of these, 1086 (99.3%) were in infants and children less than 4 years of age, and 683 (62.4%) in abandoned children living in public institutions at the time of diagnosis. By Dec 31, 1990, 493 (45.1%) mothers of children with AIDS had been located and tested, and 37 (7.5%) were positive for HIV; 423 (38.7%) cases were in children who had received transfusions of unscreened blood, and 6 (0.5%) were in children with clotting disorders. HIV transmission through the improper use of needles and syringes is strongly suspected in most of the remaining 628 (57.4%) children with AIDS, most of whom had received multiple therapeutic injections. This outbreak demonstrates the serious potential for HIV transmission in medical facilities that intensively and improperly use parenteral therapy and have poor sterilisation technique. PMID:1679471

Hersh, B S; Popovici, F; Apetrei, R C; Zolotusca, L; Beldescu, N; Calomfirescu, A; Jezek, Z; Oxtoby, M J; Gromyko, A; Heymann, D L

1991-09-14

116

Homopolar motor technology development  

Microsoft Academic Search

Homopolar motors are compact and, therefore, are attractive for use in a direct electric drive for a ship. The critical components for the motor are the brushes, the superconducting coils, and the power conversion system to produce the high current, low voltage DC required for the motor. A program is underway at General Atomics for the Office of Naval Research

R. J. Thome; W. Creedon; M. Reed; E. Bowles; K. Schaubel

2002-01-01

117

Understanding motor resonance  

Microsoft Academic Search

The discovery of mirror neurons in monkeys, and the finding of motor activity during action observation in humans are generally regarded to support motor theories of action understanding. These theories take motor resonance to be essential in the understanding of observed actions and the inference of action goals. However, the notions of “resonance,” “action understanding,” and “action goal” appear to

Sebo Uithol; Iris van Rooij; Harold Bekkering; Pim Haselager

2011-01-01

118

Skill acquisition Motor learning  

E-print Network

control #12;·6 3 stages of motor learning, continued ­ autonomous stage -- this stage involves motor at this stage · Role of feedback in the autonomous stage of learning ­ feedback necessary during learning·1 Skill acquisition · Motor learning theories ­ closed loop theory ­ schema theory ­ hierarchical

Sergio, Lauren E.

119

Teaching specific motor skills for conducting to young music students.  

PubMed

This report describes a specific technique which enables young music students to acquire basic motor skills essential for conducting. 18 adolescents ranging in age from 10 to 17 yr. were trained for one school year (about 9 months) to improve their manual motor performance. The systematic training, entitled preconducting, consisted of performing various repetitive combinations of certain continuous and punctuated, circular and linear movements, with the aim of making these skills as automatic as possible. The motor achievements were analyzed qualitatively and success depended more on motivation and daily practice than on age, sex, or handedness. PMID:2748301

Neiman, Z

1989-06-01

120

Surface Sampler Arm Acquiring Sample  

NASA Technical Reports Server (NTRS)

Operation of the surface sampler in obtaining Martian soil for Viking 2's molecular analysis experiment last Saturday (September 25) was closely monitored by one of the Lander cameras because of the precision required in trenching the small area--8 by 9 inches-surrounded by rocks. Dubbed 'Bonneville Salt Flats,' the exposure of thin crust appeared unique in contrast with surrounding materials and became a prime target for organic analysis in spite of potential hazards. Large rock in foreground is 8 inches high. At left, the sampler scoop has touched the surface, missing the rock at upper left by a comfortable 6 inches, and the backhoe has penetrated the surface about one-half inch. The scoop was then pulled back to sample the desired point and (second photo) the backhoe furrowed the surface pulling a piece of thin crust toward the spacecraft. The initial touchdown and retraction sequence was used to avoid a collision between a rock in the shadow of the arm and a plate joining the arm and scoop. The rock was cleared by 2 to 3 inches. The third picture was taken 8 minutes after the scoop touched the surface and shows that the collector head has acquired a quantity of soil. With surface sampler withdrawn (right), the foot-long trench is seen between the rocks. The trench is three inches wide and about 1 1/2 to 2 inches deep. The scoop reached to within 3 inches of the rock at far end of trench. Penetration appears to have left a cavernous opening roofed by the crust and only about one inch of undisturbed crust separates the deformed surface and the rock.

1976-01-01

121

Motor/generator  

DOEpatents

A motor/generator is provided for connecting between a transmission input shaft and an output shaft of a prime mover. The motor/generator may include a motor/generator housing, a stator mounted to the motor/generator housing, a rotor mounted at least partially within the motor/generator housing and rotatable about a rotor rotation axis, and a transmission-shaft coupler drivingly coupled to the rotor. The transmission-shaft coupler may include a clamp, which may include a base attached to the rotor and a plurality of adjustable jaws.

Hickam, Christopher Dale (Glasford, IL)

2008-05-13

122

Imitating Chemical Motors with Optimal Information Motors  

NASA Astrophysics Data System (ADS)

To induce transport, detailed balance must be broken. A common mechanism is to bias the dynamics with a thermodynamic fuel, such as chemical energy. An intriguing, alternative strategy is for a Maxwell demon to effect the bias using feedback. We demonstrate that these two different mechanisms lead to distinct thermodynamics by contrasting a chemical motor and information motor with identical dynamics. To clarify this difference, we study both models within one unified framework, highlighting the role of the interaction between the demon and the motor. This analysis elucidates the manner in which information is incorporated into a physical system.

Horowitz, Jordan M.; Sagawa, Takahiro; Parrondo, Juan M. R.

2013-07-01

123

Imitating chemical motors with optimal information motors.  

PubMed

To induce transport, detailed balance must be broken. A common mechanism is to bias the dynamics with a thermodynamic fuel, such as chemical energy. An intriguing, alternative strategy is for a Maxwell demon to effect the bias using feedback. We demonstrate that these two different mechanisms lead to distinct thermodynamics by contrasting a chemical motor and information motor with identical dynamics. To clarify this difference, we study both models within one unified framework, highlighting the role of the interaction between the demon and the motor. This analysis elucidates the manner in which information is incorporated into a physical system. PMID:23862988

Horowitz, Jordan M; Sagawa, Takahiro; Parrondo, Juan M R

2013-07-01

124

Fusion Plasmas Martin Greenwald  

E-print Network

of controlled fusion energy into a practical reality (1-3). In fusion reactions, nuclei of light elements join to form heavier elements releasing enormous quantities of energy. Nuclear fusion powers the sun and other of protons and neutrons. The advantages of fusion energy seem clear enough; it offers the prospect

Greenwald, Martin

125

Developing Language in a Developing Body: The Relationship between Motor Development and Language Development  

ERIC Educational Resources Information Center

During the first eighteen months of life, infants acquire and refine a whole set of new motor skills that significantly change the ways in which the body moves in and interacts with the environment. In this review article, I argue that motor acquisitions provide infants with an opportunity to practice skills relevant to language acquisition before…

Iverson, Jana M.

2010-01-01

126

Divergent Development of Gross Motor Skills in Children Who Are Blind or Sighted  

ERIC Educational Resources Information Center

This empirical study compared the average ages at which four congenitally blind children acquired 29 gross motor skills with age norms for sighted children. The results indicated distinct developmental delays in the acquisition of motor skills and a high degree of variability in developmental delays within and across the six subdomains that were…

Brambring, Michael

2006-01-01

127

Rotary DNA motors.  

PubMed Central

Many molecular motors move unidirectionally along a DNA strand powered by nucleotide hydrolysis. These motors are multimeric ATPases with more than one hydrolysis site. We present here a model for how these motors generate the requisite force to process along their DNA track. This novel mechanism for force generation is based on a fluctuating electrostatic field driven by nucleotide hydrolysis. We apply the principle to explain the motion of certain DNA helicases and the portal protein, the motor that bacteriophages use to pump the genome into their capsids. The motor can reverse its direction without reversing the polarity of its electrostatic field, that is, without major structural modifications of the protein. We also show that the motor can be driven by an ion gradient; thus the mechanism may apply as well to the bacterial flagellar motor and to ATP synthase. Images FIGURE 1 FIGURE 2 FIGURE 4 FIGURE 5 FIGURE 7 PMID:8599633

Doering, C; Ermentrout, B; Oster, G

1995-01-01

128

Motorized support jack  

DOEpatents

A compact, vacuum compatible motorized jack for supporting heavy loads and adjusting their positions is provided. The motorized jack includes: (a) a housing having a base; (b) a first roller device that provides a first slidable surface and that is secured to the base; (c) a second roller device that provides a second slidable surface and that has an upper surface; (d) a wedge that is slidably positioned between the first roller device and the second roller device so that the wedge is in contact with the first slidable surface and the second slidable surface; (e) a motor; and (d) a drive mechanism that connects the motor and the wedge to cause the motor to controllably move the wedge forwards or backwards. Individual motorized jacks can support and lift of an object at an angle. Two or more motorized jacks can provide tip, tilt and vertical position adjustment capabilities.

Haney, Steven J. (Tracey, CA); Herron, Donald Joe (Manteca, CA)

2001-01-01

129

Acquired stuttering due to recurrent anaplastic astrocytoma.  

PubMed

Acquired (neurogenic) stuttering is a rare phenomenon seen after cerebral infarction or brain injury. Aetiology of this symptom is unclear, but recent evidence supports that it is a disturbance in the left hemispheric neural network involving the interplay between the cortex and basal ganglia. We present the case of a patient who develops acquired stuttering after a recurrence of a right temporoparietal anaplastic astrocytoma (WHO grade III). We also review other cases of acquired stuttering and known anatomical correlates. PMID:24252834

Peters, Katherine B; Turner, Scott

2013-01-01

130

Metastasis: inherent vs. acquired phenotype.  

PubMed

The problem how tumor cells get the metastatic ability is still a hot debate. Based on the premise that the default state of normal cells is quiescent rather than mobile, the classic progression and early metastasis model suggested that tumor metastasis should be an acquired trait contributed by the late or early gene mutations during carcinogenesis. Here, an inherent metastasis model is proposed that the metastatic ability of the tumor cells is one of the constitutive features of the normal cells of tumor origin. The idea is based on two facts. One is that tumor arises from stem or progenitor cells and in turn are driven by tumor stem cells. The other is that emerging evidence showing that a small population of stem or progenitor cells has the inherent migration capacity in normal development and adulthood. This inherent metastatic model has some implications. First, metastatic dissemination should occur continually throughout the course of primary tumor development and generate a diverse spectrum of disseminated cells. Second, most of the disseminated tumor cells should have the stem cell like features. Third, migration of stem cells and cancer cells should invoke similar molecular processes involving metastasis. Fourth, genomic alterations that primarily promote the production of tumor cells with stem cell traits, i.e., tumor stem cell, exacerbate tumor progression and metastasis. Finally, overt metastatic production is primarily determined by whether the disseminated tumor cells can survive and grow into overt metastatic foci at the ectopic sites, instead of that whether the tumor cells can leave the primary sites and travel to other sites. All these predictions have gotten increasing supporting evidences. Yet, to confirm whether the new paradigm is true or false, it needs carefully examine whether normal stem or progenitor cells of various tissues have the potential to traveling and arriving at the ectopic sites. Furthermore, exploiting the mechanisms for regulating normal stem or progenitor cells migration may provide more critical results for our deeply understanding the secrets of tumor metastasis and offer new methods for preventing and treating tumor metastasis. PMID:20006450

Zhang, Li-jun; Li, Hang; Zhang, Li-ying; Gu, Yu; Song, Yue; Li, Fanfan; Jiang, Li-na; Li, Qing; Zhang, Hui-zhong; Zhang, Feng

2010-05-01

131

41 CFR 102-34.85 - What motor vehicles require motor vehicle identification?  

... What motor vehicles require motor vehicle identification? 102-34...REGULATION PERSONAL PROPERTY 34-MOTOR VEHICLE MANAGEMENT Identifying and Registering Motor Vehicles Motor Vehicle Identification §...

2014-01-01

132

The role of working memory in motor learning and performance  

Microsoft Academic Search

Three experiments explore the role of working memory in motor skill acquisition and performance. Traditional theories postulate that skill acquisition proceeds through stages of knowing, which are initially declarative but later procedural. The reported experiments challenge that view and support an independent, parallel processing model, which predicts that procedural and declarative knowledge can be acquired separately and that the former

J. P. Maxwell; R. S. W. Masters; F. F. Evesb

2003-01-01

133

Pilot study: Computer-based virtual anatomical interactivity for rehabilitation of individuals with chronic acquired brain injury.  

PubMed

Deficiencies in upper-limb motor function and executive functioning can compromise an affected individual's ability to complete everyday activities. Impaired motor and executive functioning therefore pose a risk to increasing numbers of veterans who have been diagnosed with acquired brain injury. This article reports on changes in upper-limb motor function and executive functioning of 12 adult participants with chronic acquired brain injury using a novel, computer-based, motor and cognitive rehabilitation program called PreMotor Exercise Games (PEGs). Manual muscle, goniometric range of motion, and dynamometer assessments were used to determine motor functioning while the Executive Function Performance Test measured cognitive functioning. A three-level repeated measures design was conducted to determine changes pre- and postintervention. Participants demonstrated significant improvement in shoulder (p = 0.01) and wrist (p = 0.01) range of motion and clinically relevant improvement for elbow range of motion. Participants demonstrated clinically relevant improvement in shoulder, elbow, and wrist strength. Finally, participants demonstrated significant improvement in executive functioning (p < 0.05). Using PEGs as a modality for both motor and cognitive intervention is a potentially beneficial adjunct to rehabilitation and warrants further study. PMID:25019661

Simmons, C Douglas; Arthanat, Sajay; Macri, Vincent J

2014-01-01

134

A case of acquired Zinc deficiency.  

PubMed

We report a case of adult-onset acquired zinc deficiency after bariatric surgery. Zinc deficiency may be inherited in the form of acrodermatitis enteropathica or acquired by low nutritional intake, malabsorption, excessive loss of zinc, or a combination of these factors. PMID:22630571

Bae-Harboe, Yoon-Soo Cindy; Solky, Ana; Masterpol, Katherine Szyfelbein

2012-05-01

135

Cost of Hospital-Acquired Infection  

Microsoft Academic Search

The authors assessed the costs of hospital-acquired infections using rigorous econometric methods on publicly available data, controlling for the interdependency of length of stay and the incidence of hospital acquired infection, and estimated the cost shares of different payers. They developed a system of equations involving length of stay, incidence of infection, and the total hospital care cost to be

Mahmud Hassan; Howard P. Tuckman; Robert H. Patrick; David S. Kountz; Jennifer L. Kohn

2010-01-01

136

Hospital-acquired infection in elderly patients  

Microsoft Academic Search

Increasing numbers of elderly people are being treated in hospitals and are at particular risk of acquiring infections. The incidence, risk factors and types of hospital-acquired infection (HAI) in the elderly are reviewed. Special reference is made to urinary tract infections, respiratory tract infections, gastrointestinal infections including Clostridium difficile, bacteraemia, skin and soft tissue infections and infections with antibiotic-resistant organisms.

M. E. Taylor; B. A. Oppenheim

1998-01-01

137

Acquired Surface Dyslexia: The Evidence from Hebrew.  

ERIC Educational Resources Information Center

Investigates the symptoms of acquired surface dyslexia in Hebrew. Four acquired surface dyslexic adults were compared with eight normal second graders in terms of reading strategy. Homophones and homographs were a major source of difficulty for native Hebrew surface dyslexic readers; the normal second graders used a non-lexical strategy. (45…

Birnboim, Smadar

1995-01-01

138

Bemerkungen zur "kalten Fusion"  

E-print Network

Steven Jones et al. reported to have observed nuclear fusion at room temperature. They observed this "cold fusion" by electrolyzing heavy water. Later experiments confirmed these observations. These experiments confirmed the generation of strong electric fields within the deuterided metals. These electric fields accelerate the deuterons to keV energies and allow the observed nuclear fusion. Roman Sioda and I suggested a theoretical description of this nuclear fusion. Our "extended micro hot fusion" scenario explains how nuclear fusion can be generated over a long time within deuterided metals. Moreover we predicted the explosion of large pieces of deuterided metals. This article reviews the "cold fusion" work of Steven Jones et al. and discusses the fracto-fusion scenario. I show that the extended micro hot fusion scenario can explain the observed neutron emissions, neutron bursts, and heat bursts.

Rainer W. Kuehne

2006-04-14

139

Bemerkungen zur "kalten Fusion"  

E-print Network

Steven Jones et al. reported to have observed nuclear fusion at room temperature. They observed this "cold fusion" by electrolyzing heavy water. Later experiments confirmed these observations. These experiments confirmed the generation of strong electric fields within the deuterided metals. These electric fields accelerate the deuterons to keV energies and allow the observed nuclear fusion. Roman Sioda and I suggested a theoretical description of this nuclear fusion. Our "extended micro hot fusion" scenario explains how nuclear fusion can be generated over a long time within deuterided metals. Moreover we predicted the explosion of large pieces of deuterided metals. This article reviews the "cold fusion" work of Steven Jones et al. and discusses the fracto-fusion scenario. I show that the extended micro hot fusion scenario can explain the observed neutron emissions, neutron bursts, and heat bursts.

Kuehne, R W

2006-01-01

140

Exchange of rotor components in functioning bacterial flagellar motor  

SciTech Connect

The bacterial flagellar motor is a rotary motor driven by the electrochemical potential of a coupling ion. The interaction between a rotor and stator units is thought to generate torque. The overall structure of flagellar motor has been thought to be static, however, it was recently proved that stators are exchanged in a rotating motor. Understanding the dynamics of rotor components in functioning motor is important for the clarifying of working mechanism of bacterial flagellar motor. In this study, we focused on the dynamics and the turnover of rotor components in a functioning flagellar motor. Expression systems for GFP-FliN, FliM-GFP, and GFP-FliG were constructed, and each GFP-fusion was functionally incorporated into the flagellar motor. To investigate whether the rotor components are exchanged in a rotating motor, we performed fluorescence recovery after photobleaching experiments using total internal reflection fluorescence microscopy. After photobleaching, in a tethered cell producing GFP-FliN or FliM-GFP, the recovery of fluorescence at the rotational center was observed. However, in a cell producing GFP-FliG, no recovery of fluorescence was observed. The transition phase of fluorescence intensity after full or partially photobleaching allowed the turnover of FliN subunits to be calculated as 0.0007 s{sup -1}, meaning that FliN would be exchanged in tens of minutes. These novel findings indicate that a bacterial flagellar motor is not a static structure even in functioning state. This is the first report for the exchange of rotor components in a functioning bacterial flagellar motor.

Fukuoka, Hajime; Inoue, Yuichi [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577 (Japan) [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577 (Japan); Graduate School of Life Sciences, Tohoku University, Aoba-ku, Sendai 980-8577 (Japan); Terasawa, Shun [Graduate School of Life Sciences, Tohoku University, Aoba-ku, Sendai 980-8577 (Japan)] [Graduate School of Life Sciences, Tohoku University, Aoba-ku, Sendai 980-8577 (Japan); Takahashi, Hiroto [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577 (Japan)] [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577 (Japan); Ishijima, Akihiko, E-mail: ishijima@tagen.tohoku.ac.jp [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577 (Japan) [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577 (Japan); Graduate School of Life Sciences, Tohoku University, Aoba-ku, Sendai 980-8577 (Japan)

2010-03-26

141

Parametric electric motor study  

SciTech Connect

Technology for the axial gap motor was developed by DOE with an investment of approximately $15 million. This development effort is for motor technologies of high power density and high efficiency. Such motors that are also small and light-weight are not available on the commercial market because high-power motors have typically been used in large industrial applications where small size and light weight are not requirements. AC Delco has been developing motors since 1918 and is interested in leveraging its research and development dollars to produce an array of motor systems for vehicles and to develop a future line of propulsion products. The DOE focus of the study was applied to machining applications. The most attractive feature of this motor is the axial air gap, which may make possible the removal of the motor`s stationary component from a total enclosure of the remainder of the machine if the power characteristics are adequate. The objectives of this project were to evaluate alternative electric drive systems for machine tools and automotive electric drive systems and to select a best machine type for each of those applications. A major challenge of this project was to produce a small, light-weight, highly efficient motor at a cost-effective price. The project developed machine and machine drive systems and design criteria for the range of applications. The final results included the creation of a baseline for developing electric vehicle powertrain system designs, conventional vehicle engine support system designs, and advanced machine tool configurations. In addition, an axial gap permanent magnet motor was built and tested, and gave, said one engineer involved, a sterling performance. This effort will commercialize advanced motor technology and extend knowledge and design capability in the most efficient electric machine design known today.

Adams, D. [Lockheed Martin Energy Systems, Inc., Oak Ridge, TN (United States); Stahura, D. [GM-AC Delco Systems, Indianapolis, IN (United States)

1995-04-30

142

[Development and training of monocular motor control].  

PubMed

Misalignment of the visual axes of the eyes observed in strabismus may result from sensory, motor, and/or central nervous system disorders. The functional properties of a technique designed to increase, through training, the monocular motor control of normal human subjects was evaluated, the ultimate goal being obviously to apply the technique to cases of minor strabismus. The subject is seated in front of a television screen. A diaphragm extending from the subject's head to the screen divides the picture into two visually separated half fields. A micro-computer was programmed to project two patterns on the screen, made up of vertical green and grey bars (spatial frequency, 3 deg.). Displacement of the two visually superposable half fields could be independently achieved. The subject's task was to fixate, with one eye, the corresponding half field maintained stationary and track, with the other eye, the motion of the second half field. Perfect fusion of the two half fields has to be preserved during movements of the mobile half field over 2 to 6 degrees at a frequency of 0.4 Hz. The results show that after a few training sessions, subjects developed a high gain monocular motor control. This observation suggests that the method may be used as therapy to correct minor strabismus with or without anomalous retinal correspondence, and offers the possibility to study static and dynamic characteristics of Panum's areas and particularly their modifications as a function of training of monocular motor control. PMID:6663031

Gauthier, G M; Marchetti, E; Piron, J P; Vercher, J L

1983-01-01

143

17 CFR 210.3-05 - Financial statements of businesses acquired or to be acquired.  

Code of Federal Regulations, 2010 CFR

... (iii) Separate financial statements of the acquired...presented once the operating results of the acquired business...audited consolidated financial statements of the registrant...understand the historical financial results of the...

2010-04-01

144

Review of fusion synfuels  

SciTech Connect

Thermonuclear fusion offers an inexhaustible source of energy for the production of hydrogen from water. Depending on design, electric generation efficiencies of approx. 40 to 60% and hydrogen production efficiencies by high-temperature electrolysis of approx. 50 to 65% are projected for fusion reactors using high-temperatures blankets. Fusion/coal symbiotic systems appear economically promising for the first generation of commercial fusion synfuels plants. Coal production requirements and the environmental effects of large-scale coal usage would be greatly reduced by a fusion/coal system. In the long term, there could be a gradual transition to an inexhaustible energy system based solely on fusion.

Fillo, J.A.

1980-01-01

145

A variable torque motor compatible with magnetic resonance imaging  

NASA Astrophysics Data System (ADS)

High magnetic fields used in magnetic resonance imaging (MRI) do not allow the employment of conventional motors due to various incompatibility issues. This paper reports on a new motor that can operate in or near high field magnets used for MRI. The motor was designed to be operational with the MRI equipment and could be used in a rotating imaging gantry inside the magnet designed for dual modality imaging. Furthermore, it could also be used for image guided robotic interventional procedures inside a MRI system if so desired. The prototype motor was developed using magnetic resonance (MR) compatible materials, and its functionality with MR imaging was evaluated experimentally by measuring the performance of the motor and its effect on the MR image quality. Since in our application, namely, single photon emission tomography, the motor has to perform precise stepping of the gantry in small angular steps the most important parameter is the start-up torque. The experimental results showed that the motor has a start-up torque up to 1.37 Nm and rotates at 196 rpm when a constant voltage difference of 12 V is applied at a magnetic field strength of 1 T. The MR image quality was quantified by measuring the signal-to-noise of images acquired under different conditions. The results presented here indicate that the motor is MR compatible and could be used for rotating an imaging gantry or a surgical device inside the magnet.

Roeck, W. W.; Ha, S.-H.; Farmaka, S.; Nalcioglu, O.

2009-04-01

146

Fusion of range and visual data for the extraction of scene structure information Haris Baltzakis  

E-print Network

Fusion of range and visual data for the extraction of scene structure information Haris Baltzakis data is proposed. Data fusion is achieved by validating assumptions formed according to 2D range scans measurements in large angular fields and at very fast rates. The acquired range information is compact enough

Argyros, Antonis

147

Real-time 3D Reconstruction in Dynamic Scenes using Point-based Fusion Maik Keller  

E-print Network

is to acquire depth measurements either using sequences of regular 2D images (e.g. [19]), or with active sensors, and fusion is performed using a simple weighted average. For active sensors, this method produces veryReal-time 3D Reconstruction in Dynamic Scenes using Point-based Fusion Maik Keller pmdtechnologies

Weyrich, Tim

148

Adjacent Lumbar Disc Herniation after Lumbar Short Spinal Fusion  

PubMed Central

A 70-year-old outpatient presented with a chief complaint of sudden left leg motor weakness and sensory disturbance. He had undergone L4/5 posterior interbody fusion with L3–5 posterior fusions for spondylolisthesis 3 years prior, and the screws were removed 1 year later. He has been followed up for 3 years, and there had been no adjacent segment problems before this presentation. Lumbar magnetic resonance imaging (MRI) showed a large L2/3 disc hernia descending to the L3/4 level. Compared to the initial MRI, this hernia occurred in an “intact” disc among multilevel severely degenerated discs. Right leg paresis and bladder dysfunction appeared a few days after admission. Microscopic lumbar disc herniotomy was performed. The right leg motor weakness improved just after the operation, but the moderate left leg motor weakness and difficulty in urination persisted. PMID:25276453

Iwatsuki, Koichi; Ohnishi, Yu-ichiro; Yoshimine, Toshiki

2014-01-01

149

Homopolar motors and generators. (Latest citations from the INSPEC: Information Services for the Physics and Engineering Communities database). Published Search  

SciTech Connect

The bibliography contains citations concerning design, analysis, construction, testing, and applications of homopolar motors and generators. Energy storage for nuclear fusion and industrial welding facilities is discussed. Applications of homopolar motors in transportation are presented. Topics also include magnetic circuit analysis, superconducting windings, and environmental testing. (Contains a minimum of 54 citations and includes a subject term index and title list.)

Not Available

1992-12-01

150

Fusion Power Associates, 2012 Annual Meeting 1 General Fusion  

E-print Network

Fusion Power Associates, 2012 Annual Meeting 1 General Fusion #12;Fusion Power Associates, 2012 Annual Meeting 2 General Fusion Making affordable fusion power a reality. · Founded in 2002, based to demonstrate the first fusion system capable of "net gain" 3 years after proof · Validated by leading experts

151

Fusion Power Associates, 2011 Annual Meeting 1 General Fusion  

E-print Network

Fusion Power Associates, 2011 Annual Meeting 1 General Fusion #12;Fusion Power Associates, 2011 Annual Meeting 2 General Fusion Making commercially viable fusion power a reality. · Founded in 2002, based in Vancouver, Canada · Plan to demonstrate a fusion system capable of "net gain" within 3 years

152

MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division  

E-print Network

MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division J.H. Schultz M Point Studies #12;MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division A New on assumed p*/E #12;MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division Calibration

153

MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division  

E-print Network

MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division J.H. Schultz, P close #12;MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division Dimensionally No , Yes No #12;MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division Ip

154

Acquired reactive perforating collagenosis: current status.  

PubMed

Acquired reactive perforating collagenosis is a unique perforating dermatosis, characterized clinically by umbilicated hyperkeratotic papules or nodules and histologically by a focal hyperkeratosis in direct contact with transepidermal perforating dermal collagen. Several inflammatory or malignant systemic diseases may coexist with acquired reactive perforating collagenosis. The possible biochemical or immunological mechanisms of the systemic diseases, potentially responsible for the development and appearance of acquired reactive perforating collagenosis, are still under investigation. Several topical treatments, ultraviolet B phototherapy and allopurinol p.o. administration may be effective. PMID:20629824

Karpouzis, Anthony; Giatromanolaki, Alexandra; Sivridis, Efthimios; Kouskoukis, Constantin

2010-07-01

155

Motor Vehicle Record Procedure Objective  

E-print Network

Motor Vehicle Record Procedure Objective Outline the procedure for obtaining motor vehicle record (MVR) through Fleet Services. Vehicle Operator Policy 3. Operators with 7 or more points on their motor vehicle record

Kirschner, Denise

156

Ontario Hydro Motor Efficiency Study  

E-print Network

Electric motors consume more than one-half of the electrical energy produced by Ontario Hydro. In the residential sector, the major motor load is for refrigerators and freezers while packaged equipment dominate the motor load in the commercial...

Dautovich, D. R.

1980-01-01

157

Redundant Motor Drive System.  

National Technical Information Service (NTIS)

Two separate gear trains, each including a motor adapted to perform a driving function without backdriving the other, are included in a redundant motor drive system. A base supports parallel pillars which in turn supports a shaft having a worm gear affixe...

J. A. Calvert

1978-01-01

158

Stepping motor controller  

DOEpatents

A stepping motor is microprocessingly controlled by digital circuitry which monitors the output of a shaft encoder adjustably secured to the stepping motor and generates a subsequent stepping pulse only after the preceding step has occurred and a fixed delay has expired. The fixed delay is variable on a real-time basis to provide for smooth and controlled deceleration.

Bourret, Steven C. (Los Alamos, NM); Swansen, James E. (Los Alamos, NM)

1984-01-01

159

Stepping motor controller  

DOEpatents

A stepping motor is microprocessor controlled by digital circuitry which monitors the output of a shaft encoder adjustably secured to the stepping motor and generates a subsequent stepping pulse only after the preceding step has occurred and a fixed delay has expired. The fixed delay is variable on a real-time basis to provide for smooth and controlled deceleration.

Bourret, S.C.; Swansen, J.E.

1982-07-02

160

Sensorless, Online Motor Diagnostics  

E-print Network

for other control or protection functions. Thus, only intelligence, in the form of a microcomputer, need computer-based electronic motor protection relay platform, such as one shown in Figure 1, for beta-effective, microprocessor-based, protective-relay platforms to monitor motors for a variety of abnormali- ties in addition

Yazici, Birsen

161

Non-pollution motor  

Microsoft Academic Search

A non-pollution motor powered from a source of a low pressure liquified cryogenic is disclosed. A means for converting, upon demand, a quantity of the cryogenic into a high pressure gas is connected between a gas expander and a storage volume tank. The high pressure gas stored in the volume tank is used to power a gas turbine motor. The

T. R. Hencey; W. J. Murphy

1982-01-01

162

HTS ship propulsion motors  

Microsoft Academic Search

In many modern ships, propulsion systems are so large and heavy that they force the rest of the ship to be constructed around them. Large ship propulsion motors could be made more compact and lighter by application of high temperature superconductor (HTS) technology, thus providing relief from this constraint. HTS ship propulsion motors are more compact, lighter weight, more efficient,

S. S. Kalsi

2004-01-01

163

A Novel Approach to Determining Motor Load  

E-print Network

by properly sizing of motors. MOTOR EFFICIENCY Motor efficiency is influenced by a number of factors, the salient ones being motor design, motor size, and motor load. Simply stated, motor efficiency is the ratio between the output shaft power generated.... Motor Load A final faclar that influences motor efficiency is the oper-ating load. Molar efficiency decreases markedly when the load falls below some critical level. The critical load varies depend-ing on motor size, the larger the motor the lower...

Brown, M.

164

Fusion Energy Sciences Program Mission  

E-print Network

Fusion Energy Sciences Program Mission The Fusion Energy Sciences (FES) program leads the national research effort to advance plasma science, fusion science, and fusion technology--the knowledge base needed for an economically and environmentally attractive fusion energy source. The National Energy Policy states that fusion

165

Induction motor control  

NASA Technical Reports Server (NTRS)

Electromechanical actuators developed to date have commonly ultilized permanent magnet (PM) synchronous motors. More recently switched reluctance (SR) motors have been advocated due to their robust characteristics. Implications of work which utilized induction motors and advanced control techniques are discussed. When induction motors are operated from an energy source capable of controlling voltages and frequencies independently, drive characteristics are obtained which are superior to either PM or SR motors. By synthesizing the machine frequency from a high-frequency carrier (nominally 20 kHz), high efficiencies, low distortion, and rapid torque response are available. At this time multiple horsepower machine drives were demonstrated, and work is on-going to develop a 20 hp average, 40 hp peak class of aerospace actuators. This effort is based upon high-frequency power distribution and management techniques developed by NASA for Space Station Freedom.

Hansen, Irving G.

1990-01-01

166

Induction motor control  

NASA Technical Reports Server (NTRS)

Electromechanical actuators developed to date have commonly utilized permanent magnet (PM) synchronous motors. More recently switched reluctance (SR) motors have been advocated due to their robust characteristics. Implications of work which utilizes induction motors and advanced control techniques are discussed. When induction motors are operated from an energy source capable of controlling voltages and frequencies independently, drive characteristics are obtained which are superior to either PM or SR motors. By synthesizing the machine frequency from a high frequency carrier (nominally 20 kHz), high efficiencies, low distortion, and rapid torque response are available. At this time multiple horsepower machine drives were demonstrated, and work is on-going to develop a 20 hp average, 40 hp peak class of aerospace actuators. This effort is based upon high frequency power distribution and management techniques developed by NASA for Space Station Freedom.

Hansen, Irving G.

1990-01-01

167

Towards cognitive image fusion  

Microsoft Academic Search

The increasing availability and deployment of imaging sensors operating in multiple spectral bands has led to a large research effort in image fusion, resulting in a plethora of pixel-level image fusion algorithms. However, the cognitive aspects of multisensor image fusion have not received much attention in the development of these methods. In this study we investigate how humans interpret visual

Alexander Toet; Maarten A. Hogervorst; Stavri G. Nikolov; John J. Lewis; Timothy D. Dixon; David R. Bull; Cedric Nishan Canagarajah

2010-01-01

168

Investigations of image fusion  

Microsoft Academic Search

The objective of image fusion is to combine information from multiple images of the same scene. The result of image fusion is a single image which is more suitable for the purpose of human visual perception or further image processing tasks. In this thesis, a region-based fusion algorithm using the wavelet transform is proposed. The identification of important features in

Zhong Zhang

1999-01-01

169

About sponsorship Fusion power  

E-print Network

project to build a nuclear-fusion reactor came a step closer to reality when politicians agreed it should proving step before a commercial fusion reactor is built. It would demonstrate that power can be generated into those alternatives. ITER Part of the reason why commercial fusion reactors have always been 30 years

170

Controlled nuclear fusion apparatus  

Microsoft Academic Search

A fusion power generating device is disclosed having a relatively small and inexpensive core region which may be contained within an energy absorbing blanket region. The fusion power core region contains apparatus of the toroidal type for confining a high density plasma. The fusion power core is removable from the blanket region and may be disposed and\\/or recycled for subsequent

R. W. Bussard; B. Coppi

1982-01-01

171

Asymmetric acquired demyelinating polyneuropathies: MMN and MADSAM  

Microsoft Academic Search

Opinion statement  More than a half a century after Austin’s initial description of chronic inflammatory demyelinating polyradiculoneuropathy\\u000a (CIDP), the clinical spectrum of chronic acquired demyelinating polyneuropathies has expanded. Currently there are a number\\u000a of entities that can be put under the heading of chronic acquired demyelinating neuropathy (CADP) based on differing clinical\\u000a presentations. In this scheme, CIDP is used only to

Jonathan S. Katz; David S. Saperstein

2001-01-01

172

Economic aspects of hospital acquired infection  

Microsoft Academic Search

Despite the decline in rates of hospital acquired infections (HAI) since the 1950s, the level remains high and a significant proportion of them are unavoidable. International studies show that between 5.9 and 13.5 patients in every hundred are affected by hospital acquired infections, most frequently of the urinary tract, of the lower respiratory tract and in surgical wounds. The evidence

Elizabeth Currie; ALan Maynard

1989-01-01

173

Multisensor Fusion for Decision-based Control Cues  

Microsoft Academic Search

Data acquired from multiple sensors provides a means fo r defining a knowledge base and a current situation scenario. The data is accepted and integrated as intelligence with the use of signal - and symbol-level fusion to translate the raw data into intelligence information that can be used to baseline the know ledge of a control system. An application of

L. A. Gee; M. A. Abidi

174

Magnetized target fusion and fusion propulsion.  

SciTech Connect

Magnetized target fusion (MTF) is a thermonuclear fusion concept that is intermediate between the two mainline approaches, magnetic confinement and inertial confinement fusion (MCF and ICF). MTF incorporates some aspects of each and offers advantages over each of the mainline approaches. First, it provides a means of reducing the driver power requirements, thereby admitting a wider range of drivers than ICF. Second, the magnetic field is only used for insulation, not confinement, and the plasma is wall confined, so that plasma instabilities are traded in for hydrodynamic instabilities. However, the degree of compression required to reach fusion conditions is lower than for ICF, so that hydrodynamic instabilities are much less threatening. The standoff driver innovation proposes to dynamically form the target plasma and a gaseous shell that compresses and confines the target plasma. Therefore, fusion target fabrication is traded in for a multiplicity of plasma guns, which must work in synchrony. The standoff driver embodiment of MTF leads to a fusion propulsion system concept that is potentially compact and lightweight. We will discuss the underlying physics of MTF and some of the details of the fusion propulsion concept using the standoff driver approach. We discuss here the optimization of an MTF target design for space propulsion.

Kirkpatrick, R. C. (Ronald C.)

2001-01-01

175

BIOCHEMISTRY: Processive Motor Movement  

NSDL National Science Digital Library

Access to the article is free, however registration and sign-in are required. Permeating throughout a eukaryotic cell is a lattice of filamentous tracks called microtubules, upon which molecular motors travel, moving cargo about. In this transport system, the molecular motor kinesin-1 carries relatively large loads (molecular complexes, membranous vesicles, and organelles), its motion powered by the energy liberated from hydrolyzing adenosine triphosphate (ATP) (1). A mechanism that controls the stepwise movement of the molecular motor along a filamentous microtubule track in the cell does not seem to require the track itself.

David D. Hackney (Carnegie Mellon University;Department of Biological Science)

2007-04-06

176

Electric 'LEGO' Motor II  

NSDL National Science Digital Library

This website, presented by Jose Pino, is a guide of how to build a motor with Legos. The Legos will house the motor and allow you to connect the power to something like a wheel. This is a great class projects; it opens up students to new ideas about electronics in an easily accessible format. Pino provides a step by step process with text, and also images, to guide the process. Additionally, there is a video posted at the end of the page that presents a working Lego motor.

Pino, Jose

2008-11-17

177

RPM of AC Motors  

NSDL National Science Digital Library

This interactive presentation, created by Terry Bartelt for the Electromechanical Digital Library, discusses the rotations per minute (RPM) of AC motors. Bartelt begins with a discussion of the magnetism that allows most of these motors to function. The author addresses such factors as the frequency of the applied voltage and also the number of stator poles located in the magnetic field. Two and four pole motors are then discussed and compared to each other. Bartelt explains each using helpful interactive flash animations. These are not only useful in explanation, but they allow the student to more fully engage with the topic. The author concludes the presentation with a brief series of questions.

Bartelt, Terry L.

2009-04-14

178

Hydraulic core cutting motor  

SciTech Connect

This patent describes an apparatus for drilling core cutting from the sidewall of a drill hole wherein the apparatus comprises an elongated housing with a hydraulic operated back-up shoe mounted within the housing for wedging the housing at a selected location in the drill hole and a hydraulic motor with a drilling bit connected thereto for rotation by the hydraulic motor and hydraulic means mounted within the housing and connected to the hydraulic motor for moving the bit into drilling engagement with the sidewall of the drill hole.

Kilmer, L.G.; Carter, J.W.

1987-11-24

179

Piezoelectric Rotary Tube Motor  

NASA Technical Reports Server (NTRS)

A custom rotary SQUIGGLE(Registered TradeMark) motor has been developed that sets new benchmarks for small motor size, high position resolution, and high torque without gear reduction. Its capabilities cannot be achieved with conventional electromagnetic motors. It consists of piezoelectric plates mounted on a square flexible tube. The plates are actuated via voltage waveforms 90 out of phase at the resonant frequency of the device to create rotary motion. The motors were incorporated into a two-axis postioner that was designed for fiber-fed spectroscopy for ground-based and space-based projects. The positioner enables large-scale celestial object surveys to take place in a practical amount of time.

Fisher, Charles D.; Badescu, Mircea; Braun, David F.; Culhane, Robert

2011-01-01

180

Linear Motor Powered Transportation  

E-print Network

This special issue on linear-motor powered transportation covers both supporting technologies and innovative transport systems in various parts of the World, as this technology moves from the lab to commercial operations. ...

Thornton, Richard D.

181

MotorWeek  

SciTech Connect

In 2008, PBS's MotorWeek, television's original automotive magazine, visited Argonne's Transportation Technology R&D Center "to learn what it really takes to make clean power sources a viable reality."

None

2009-01-01

182

MotorWeek  

ScienceCinema

In 2008, PBS's MotorWeek, television's original automotive magazine, visited Argonne's Transportation Technology R&D Center "to learn what it really takes to make clean power sources a viable reality."

None

2013-04-19

183

Prediction of infant's motor development  

Microsoft Academic Search

The aim of the study was to predict motor development using indicators from infant's early motor performance. A group of 46 infants were tested with Alberta Infant Motor Scale and were divided in two groups according to the interval time of assessment (2 and 6 months). The results for the first group revealed that supine position could predict infant's motor

Sophia Charitou; Katerina Asonitou; Dimitra Koutsouki

2010-01-01

184

The Motor Learning of Children.  

ERIC Educational Resources Information Center

This study presents some highlights of what research tells the practitioner about the motor learning of children. Major emphasis is on motor learning in relation to the physical and motor characteristics of the child's maturation and development. In the first three sections of the study, general ideas concerning motor learning are discussed.…

Christina, Robert W.

185

Justification for Energy Efficient Motors  

E-print Network

This paper presents the results of a study of Energy Efficient (or EE) motors in NEMA frame sizes, (1-200 HP). It examines the economics of using EE motors for new motor requirements, as replacements for motors - instead of rewinding...

Buschart, R. J.

1981-01-01

186

Implementing Motor Management  

E-print Network

manufacturer along, with the DOE's Independent Performance Validation (IPV) team, assembled a partnership team. After further evaluation, it was determined that not only was a more efficient motor needed, but that the use of an adjustable speed drive (ASD... manufacturer along, with the DOE's Independent Performance Validation (IPV) team, assembled a partnership team. After further evaluation, it was determined that not only was a more efficient motor needed, but that the use of an adjustable speed drive (ASD...

Colip, R. L.

187

Investigation into Fusion Feasibility of a Magnetized Target Fusion Reactor  

E-print Network

Investigation into Fusion Feasibility of a Magnetized Target Fusion Reactor Michael Lindstrom fusion en- ergy known as a magnetized target fusion reactor, in which an intense pressure wave the fusion reactor design we have chosen to model. In section 2, we present a simplified model and set

Wetton, Brian

188

Electric vehicle motors and controllers  

NASA Technical Reports Server (NTRS)

Improved and advanced components being developed include electronically commutated permanent magnet motors of both drum and disk configuration, an unconventional brush commutated motor, and ac induction motors and various controllers. Test results on developmental motors, controllers, and combinations thereof indicate that efficiencies of 90% and higher for individual components, and 80% to 90% for motor/controller combinations can be obtained at rated power. The simplicity of the developmental motors and the potential for ultimately low cost electronics indicate that one or more of these approaches to electric vehicle propulsion may eventually displace presently used controllers and brush commutated dc motors.

Secunde, R. R.

1981-01-01

189

Magnetic resonance imaging of acquired cardiac disease.  

PubMed Central

Over the last 15 years, advances in magnetic resonance imaging techniques have increased the accuracy and applicability of cardiovascular magnetic resonance imaging. These advances have improved the utility of magnetic resonance imaging in evaluating cardiac morphology, blood flow, and myocardial contractility, all significant diagnostic features in the evaluation of the patient with acquired heart disease. Utilization of cardiovascular magnetic resonance imaging has been limited, primarily due to clinical reliance upon nuclear scintigraphy and echocardiography. Recent developments in fast and ultrafast imaging should continue to enhance the significance of magnetic resonance imaging in this field. Widespread use of magnetic resonance imaging in the evaluation of the cardiovascular system will ultimately depend upon its maturation into a comprehensive, noninvasive imaging technique for the varying manifestations of acquired heart disease, including cardiomyopathy, ischemic heart disease, and acquired valvular disease. Images PMID:8792545

Carrol, C L; Higgins, C B; Caputo, G R

1996-01-01

190

Structure of plasticity in human sensory and motor networks due to perceptual learning.  

PubMed

As we begin to acquire a new motor skill, we face the dual challenge of determining and refining the somatosensory goals of our movements and establishing the best motor commands to achieve our ends. The two typically proceed in parallel, and accordingly it is unclear how much of skill acquisition is a reflection of changes in sensory systems and how much reflects changes in the brain's motor areas. Here we have intentionally separated perceptual and motor learning in time so that we can assess functional changes to human sensory and motor networks as a result of perceptual learning. Our subjects underwent fMRI scans of the resting brain before and after a somatosensory discrimination task. We identified changes in functional connectivity that were due to the effects of perceptual learning on movement. For this purpose, we used a neural model of the transmission of sensory signals from perceptual decision making through to motor action. We used this model in combination with a partial correlation technique to parcel out those changes in connectivity observed in motor systems that could be attributed to activity in sensory brain regions. We found that, after removing effects that are linearly correlated with somatosensory activity, perceptual learning results in changes to frontal motor areas that are related to the effects of this training on motor behavior and learning. This suggests that perceptual learning produces changes to frontal motor areas of the brain and may thus contribute directly to motor learning. PMID:24523536

Vahdat, Shahabeddin; Darainy, Mohammad; Ostry, David J

2014-02-12

191

Interactive exploration of acquired 3D data  

NASA Astrophysics Data System (ADS)

The goal of our image-based rendering group is to accurately render scenes acquired from the real world. To achieve this goal, we capture scene data by taking 3D panoramic photographs from multiple locations and merge the acquired data into a single model from which real-time 3D rendering can be performed. In this paper, we describe our acquisition hardware and rendering system that seeks to achieve this goal, with particular emphasis on the techniques used to support interactive exploration.

Nyland, Lars S.; McAllister, David K.; Popescu, Voicu; McCue, Chris; Lastra, Anselmo A.

2000-05-01

192

Fusion Energy Education  

NSDL National Science Digital Library

The basics of fusion are deceptively simple: the process powers the sun and other stars, and it all takes place when atomic nuclei collide at high speed. But many questions remain. How can humans develop and exploit fusion energy? Is there a way to convert it more efficiently into useful mechanical, electrical, or thermal energy? This intriguing site, created by the Lawrence Livermore National Laboratory and the Princeton Plasma Physics Laboratory, presents an online fusion course designed to teach students and others about how fusion works and how it might be harnessed in the future. Visitors can try out The Guided Tour to get started, or they can click on one of the Main Topics. These include Energy Sources and Conversions, Two Key Fusion Reactions, and Creating the Conditions for Fusion. Each section contains graphics, explanatory text, and various diagrams. The site also includes charts which can be printed out for classroom use.

193

A New Type of Motor: Pneumatic Step Motor.  

PubMed

This paper presents a new type of pneumatic motor, a pneumatic step motor (PneuStep). Directional rotary motion of discrete displacement is achieved by sequentially pressurizing the three ports of the motor. Pulsed pressure waves are generated by a remote pneumatic distributor. The motor assembly includes a motor, gearhead, and incremental position encoder in a compact, central bore construction. A special electronic driver is used to control the new motor with electric stepper indexers and standard motion control cards. The motor accepts open-loop step operation as well as closed-loop control with position feedback from the enclosed sensor. A special control feature is implemented to adapt classic control algorithms to the new motor, and is experimentally validated. The speed performance of the motor degrades with the length of the pneumatic hoses between the distributor and motor. Experimental results are presented to reveal this behavior and set the expectation level. Nevertheless, the stepper achieves easily controllable precise motion unlike other pneumatic motors. The motor was designed to be compatible with magnetic resonance medical imaging equipment, for actuating an image-guided intervention robot, for medical applications. For this reason, the motors were entirely made of nonmagnetic and dielectric materials such as plastics, ceramics, and rubbers. Encoding was performed with fiber optics, so that the motors are electricity free, exclusively using pressure and light. PneuStep is readily applicable to other pneumatic or hydraulic precision-motion applications. PMID:21528106

Stoianovici, Dan; Patriciu, Alexandru; Petrisor, Doru; Mazilu, Dumitru; Kavoussi, Louis

2007-02-01

194

A New Type of Motor: Pneumatic Step Motor  

PubMed Central

This paper presents a new type of pneumatic motor, a pneumatic step motor (PneuStep). Directional rotary motion of discrete displacement is achieved by sequentially pressurizing the three ports of the motor. Pulsed pressure waves are generated by a remote pneumatic distributor. The motor assembly includes a motor, gearhead, and incremental position encoder in a compact, central bore construction. A special electronic driver is used to control the new motor with electric stepper indexers and standard motion control cards. The motor accepts open-loop step operation as well as closed-loop control with position feedback from the enclosed sensor. A special control feature is implemented to adapt classic control algorithms to the new motor, and is experimentally validated. The speed performance of the motor degrades with the length of the pneumatic hoses between the distributor and motor. Experimental results are presented to reveal this behavior and set the expectation level. Nevertheless, the stepper achieves easily controllable precise motion unlike other pneumatic motors. The motor was designed to be compatible with magnetic resonance medical imaging equipment, for actuating an image-guided intervention robot, for medical applications. For this reason, the motors were entirely made of nonmagnetic and dielectric materials such as plastics, ceramics, and rubbers. Encoding was performed with fiber optics, so that the motors are electricity free, exclusively using pressure and light. PneuStep is readily applicable to other pneumatic or hydraulic precision-motion applications. PMID:21528106

Stoianovici, Dan; Patriciu, Alexandru; Petrisor, Doru; Mazilu, Dumitru; Kavoussi, Louis

2011-01-01

195

Viral membrane fusion  

Microsoft Academic Search

Infection by viruses having lipid-bilayer envelopes proceeds through fusion of the viral membrane with a membrane of the target cell. Viral 'fusion proteins' facilitate this process. They vary greatly in structure, but all seem to have a common mechanism of action, in which a ligand-triggered, large-scale conformational change in the fusion protein is coupled to apposition and merger of the

Stephen C Harrison

2008-01-01

196

Fusion facility siting considerations  

SciTech Connect

Inherent in the fusion program's transition from hydrogen devices to commercial power machines is a general increase in the size and scope of succeeding projects. This growth will lead to increased emphasis on safety, environmental impact, and the external effects of fusion in general, and of each new device in particular. A critically important consideration in this regard is site selection. The purpose of this paper is to examine major siting issues that may affect the economics, safety, and environmental impact of fusion.

Bussell, G.T.

1985-01-01

197

The fusion breeder  

Microsoft Academic Search

The fusion breeder is a fusion reactor designed with special blankets to maximize the transmutation by 14 MeV neutrons of uranium-238 to plutonium or thorium to uranium-233 for use as a fuel for fission reactors. Breeding fissile fuels has not been a goal of the U.S. fusion energy program. This paper suggests it is time for a policy change to

Ralph W. Moir

1982-01-01

198

Rehabilitation of motor neuron disease.  

PubMed

Amyotrophic lateral sclerosis (ALS), the most common adult motor neuron disease, is an acquired disorder that results in loss of function in multiple domains. Although there is no treatment that can halt or reverse this progressive condition, there are many opportunities for interventions that can lead to improved quality of life for the patient and caregiver. Physical and occupational therapy can assist with mobility and activities of daily living. Interventions by speech pathology can optimize nutrition and communication. Respiratory function can be managed noninvasively or invasively. Depression, hopelessness, anxiety, and other mental health issues can and should be aggressively addressed and treated. Many symptoms such as pseudobulbar affect, sialorrhea, constipation, spasticity, and cramps can be treated effectively with medications. Spirituality and religion are important issues to address, as are end-of-life concerns, including advance directives, hospice, and the dying process. In contrast to the discouraging view that "there is nothing we can do," a broad approach to management, through collaboration with a multidisciplinary team, will permit the ALS physician to make a meaningful difference in the lives of individuals living with ALS. PMID:23312666

Simmons, Zachary

2013-01-01

199

Does acquirer cash level predict post-acquisition returns?  

Microsoft Academic Search

This paper investigates whether an acquirer’s pre-announcement cash level can predict post-acquisition returns. Harford (1999, Journal of Finance, 54, 1969–1997) shows that some cash-rich acquirers have lower announcement period returns than other acquirers, suggesting the\\u000a market partially anticipates poor future performance. This paper shows that the acquirer’s cash level is also strongly and\\u000a negatively predictive of post-acquisition returns, indicating that

Derek K. Oler

2008-01-01

200

Chronic Acquired Demyelinating Polyneuropathy following Renal Transplantation  

PubMed Central

The clinical, laboratory, and treatment findings of a patient with chronic acquired demyelinating polyneuropathy (CADP) in association with renal transplantation are described. Like the present case, many such patients have been described under the rubric of chronic inflammatory demyelinating polyradiculoneuropathy (CIDP). PMID:24363943

Younger, D. S.; Orsher, Stuart

2013-01-01

201

Can English Language Learners Acquire Academic English?  

ERIC Educational Resources Information Center

The learners of English language are taught the art of communication by assisting them to read, express ideas and opinions and using strategies skillfully. These learners can acquire academic English if they recognize that the best instructional practices for English as Secondary Language (ESL) students are best practices for all students.

Cruz, Mary Carmen

2004-01-01

202

Acquiring CSR practices: from deception to authenticity  

Microsoft Academic Search

Purpose – This paper seeks to focus on CSR manifested regarding two points, namely CSR insincerity and authenticity from the point of view of pragmatist and care ethics principles. Its purpose is to evaluate critically the genuineness of the early stages in acquiring CSR practices, and to advance the notion of authenticity in its mature development stage. The analyses seek

Jelena Debeljak; Kristijan Krka?; Ivana Bušljeta Banks

2011-01-01

203

Acquiring Observation Models through Reverse Plan Monitoring  

E-print Network

. We present a general-purpose framework for updating a robot's observation model within the context of scripted actions. The automati- cally acquired observation models allow the robot to adapt to changes in the environment and robustly execute arbitrary plans. We have fully implemented the method in our AIBO robots

Veloso, Manuela M.

204

Interviewing Children with Acquired Brain Injury (ABI)  

ERIC Educational Resources Information Center

Research into the lives of children with acquired brain injury (ABI) often neglects to incorporate children as participants, preferring to obtain the opinions of the adult carer (e.g. McKinlay et al., 2002). There has been a concerted attempt to move away from this position by those working in children's research with current etiquette…

Boylan, Anne-Marie; Linden, Mark; Alderdice, Fiona

2009-01-01

205

How did Light Acquire a Velocity?  

NASA Astrophysics Data System (ADS)

We discuss how light acquired a velocity through history, from the ancient Greeks to the early modern era. Combining abstract debates, models of light, practical needs, planned research and chance, this history illustrates several key points that should be brought out in science education.

Lauginie, Pierre

2013-06-01

206

Losing innovativeness: the challenge of being acquired  

Microsoft Academic Search

Purpose – The aim of the paper is to explore how innovativeness and creativity in a small technology company changes after the company is acquired by a larger company. Design\\/methodology\\/approach – The empirical part of the article is based on interview and questionnaire data, with a focus on employees' perception of innovativeness and creativity, including their own innovativeness in relation

Karina Skovvang Christensen

2006-01-01

207

Acquired double pylorus: a case report.  

PubMed

Double pylorus is one of the rare anomalies of the gastrointestinal tract, it can be congenital or acquired. In this case we report a case of double pylorus because of chronic peptic ulcer. Upper GI endoscopy revealed gastroduodenal fistula located on the lesser curve of the antrum, the patient's symptoms were improved rapidly by intensive antiulcer treatment. PMID:22575987

Chen, Qing-Yu; Chen, Yan; Liang; Wang, Jing; Du, Qin; Cai, Jian-Ting; Chen, Jia-Min

2012-06-01

208

Neuroepidemiology of Acquired Immune Deficiency Syndrome  

Microsoft Academic Search

Neuroepidemiology is that branch of chronic disease epidemiology dealing with disorders that affect the nervous system. The potential for neurological involvement in the diagnosis and pathogenesis of Acquired Immune Deficiency Syndrome (AIDS) has recently been noted. The following review outlines the spectrum of neurological conditions seen in AIDS patients to date. These conditions include: (1) infectious central nervous system complications

Chester Nakamura; Craig A. Molgaard

1986-01-01

209

Pleural disease and acquired immune deficiency syndrome  

Microsoft Academic Search

Patients with acquired immune deficiency syndrome (AIDS) do not frequently have pleural complications. However, pneumothorax is a troublesome complication of patients with AIDS. At some medical centres, more than 50% of patients with spontaneous pneumothorax have AIDS. Most patients with sponta- neous pneumothorax and AIDS have Pneumocystis carinii infection and necrotic subpleural blebs. The pneumothoraces in these patients usually cannot

R. W. Light; H. Hamm

1997-01-01

210

Brucella abortus Infection Acquired in Microbiology Laboratories  

Microsoft Academic Search

We report an outbreak of laboratory-acquired Brucella abortus infection originating in the accidental breakage of a centrifuge tube. A total of 12 laboratory workers were infected (attack rate of 31%), with an incubation time ranging from 6 weeks to 5 months. Antibody titers were evaluated weekly in all personnel exposed, allowing the diagnosis of the infection in most cases before

PIER LUIGI FIORI; SCILLA MASTRANDREA; PAOLA RAPPELLI; PIERO CAPPUCCINELLI

2006-01-01

211

An Acquired Deficit of Audiovisual Speech Processing  

ERIC Educational Resources Information Center

We report a 53-year-old patient (AWF) who has an acquired deficit of audiovisual speech integration, characterized by a perceived temporal mismatch between speech sounds and the sight of moving lips. AWF was less accurate on an auditory digit span task with vision of a speaker's face as compared to a condition in which no visual information from…

Hamilton, Roy H.; Shenton, Jeffrey T.; Coslett, H. Branch

2006-01-01

212

A Systematic Method for Acquiring Regulatory Requirements  

E-print Network

(FAA, FCC, FDA, HHS, etc.) develop regulations Industry creates standards that support regulations with regulations (2) regulatory compliance with statutes (3) statutory compliance with the Constitution ©T.D. Breaux 2007 5 Challenges to Compliance Industry, auditors and regulators need methods to: Acquire

Breaux, Travis D.

213

Estimating the costs of Hospital Acquired Infection  

Microsoft Academic Search

Hospital acquired infections (HAI) are a largely avoidable and costly burden on public health systems. Accurate estimates of the costs of HAI are necessary to gauge the cost efficiency of alternative infection control measures, but are traditionally very difficult to compute. In particular, existing studies of the costs of HAI do not take into account the possible endogeneity bias between

Nicholas Graves; Diana Weinhold

214

Plasmodium ovale Malaria Acquired in Central Spain  

PubMed Central

We describe a case of locally acquired Plasmodium ovale malaria in Spain. The patient was a Spanish woman who had never traveled out of Spain and had no other risk factors for malaria. Because patients with malaria may never have visited endemic areas, occasional transmission of malaria to European hosts is a diagnostic and clinical challenge. PMID:12498674

Calvente, Maria Jose; Benito, Agustin; Arevalo, Juan; Calero, Maria Angeles; Segura, Javier; Rubio, Jose Miguel

2002-01-01

215

Support Network Responses to Acquired Brain Injury  

ERIC Educational Resources Information Center

Acquired brain injury (ABI) affects social relationships; however, the ways social and support networks change and evolve as a result of brain injury is not well understood. This study explored ways in which survivors of ABI and members of their support networks perceive relationship changes as recovery extends into the long-term stage. Two…

Chleboun, Steffany; Hux, Karen

2011-01-01

216

How Did Light Acquire a Velocity?  

ERIC Educational Resources Information Center

We discuss how light acquired a velocity through history, from the ancient Greeks to the early modern era. Combining abstract debates, models of light, practical needs, planned research and chance, this history illustrates several key points that should be brought out in science education.

Lauginie, Pierre

2013-01-01

217

Magnetic fusion reactor economics  

SciTech Connect

An almost primordial trend in the conversion and use of energy is an increased complexity and cost of conversion systems designed to utilize cheaper and more-abundant fuels; this trend is exemplified by the progression fossil fission {yields} fusion. The present projections of the latter indicate that capital costs of the fusion ``burner`` far exceed any commensurate savings associated with the cheapest and most-abundant of fuels. These projections suggest competitive fusion power only if internal costs associate with the use of fossil or fission fuels emerge to make them either uneconomic, unacceptable, or both with respect to expensive fusion systems. This ``implementation-by-default`` plan for fusion is re-examined by identifying in general terms fusion power-plant embodiments that might compete favorably under conditions where internal costs (both economic and environmental) of fossil and/or fission are not as great as is needed to justify the contemporary vision for fusion power. Competitive fusion power in this context will require a significant broadening of an overly focused program to explore the physics and simbiotic technologies leading to more compact, simplified, and efficient plasma-confinement configurations that reside at the heart of an attractive fusion power plant.

Krakowski, R.A.

1995-12-01

218

Oral cancer/endothelial cell fusion experiences nuclear fusion and acquisition of enhanced survival potential.  

PubMed

Most previous studies have linked cancer-macrophage fusion with tumor progression and metastasis. However, the characteristics of hybrid cells derived from oral cancer and endothelial cells and their involvement in cancer remained unknown. Double-immunofluorescent staining and fluorescent in situ hybridization (FISH) were performed to confirm spontaneous cell fusion between eGFP-labeled human umbilical vein endothelial cells (HUVECs) and RFP-labeled SCC9, and to detect the expression of vementin and cytokeratin 18 in the hybrids. The property of chemo-resistance of such hybrids was examined by TUNEL assay. The hybrid cells in xenografted tumor were identified by FISH and GFP/RFP dual-immunofluoresence staining. We showed that SCC9 cells spontaneously fused with cocultured endothelial cells, and the resultant hybrid cells maintained the division and proliferation activity after re-plating and thawing. Such hybrids expressed markers of both parental cells and became more resistant to chemotherapeutic drug cisplatin as compared to the parental SCC9 cells. Our in vivo data indicated that the hybrid cells contributed to tumor composition by using of immunostaining and FISH analysis, even though the hybrid cells and SCC9 cells were mixed with 1:10,000, according to the FACS data. Our study suggested that the fusion events between oral cancer and endothelial cells undergo nuclear fusion and acquire a new property of drug resistance and consequently enhanced survival potential. These experimental findings provide further supportive evidence for the theory that cell fusion is involved in cancer progression. PMID:25016285

Song, Kai; Song, Yong; Zhao, Xiao-Ping; Shen, Hui; Wang, Meng; Yan, Ting-Lin; Liu, Ke; Shang, Zheng-Jun

2014-10-15

219

A versatile stepping motor controller for systems with many motors  

SciTech Connect

A versatile system for controlling beamlines or complex experimental setups is described. The system as currently configured can control up to 32 motors, with all motors capable of full speed operation concurrently. There are 2 limit switch inputs for each motor, and a further input to accept a reference position marker. The motors can be controlled via a front panel keyboard with display, or by a host computer over an IEEE-488 interface. Both methods can be used together if required. There is an emergency stop'' key on the front panel keyboard to stop the motion of all motors without losing track of the motors' position. 3 refs., 4 figs., 1 tab.

Feng, S.K.; Siddons, D.P.

1989-01-01

220

Inheritance of acquired traits in plants  

PubMed Central

Since Lamarck proposed the idea of inheritance of acquired traits 200 years ago, much has been said for and against it, but the theory was finally declined after the 1930s. Despite of the negative opinions of the majority of geneticists, botanists and plant breeders have long recognized that altered properties during the growth were occasionally transmitted to the offspring. This was also the case with artificially altered properties such as dwarfism, flowering timing and plant stature, which were induced by a non-mutagenic chemical, 5-azacytidine and its derivatives. As these drugs are powerful inhibitors of DNA methylation in vivo, a close correlation between methylation and phenotypic expression was suggested. Subsequent studies showed that rice plants acquired disease resistance upon demethylation of the corresponding resistant gene, and that both resistant trait and hypomethylated status were inherited by the progeny up to nine generations. Whether or not the methylation pattern changes under natural condition was then questioned, and recent studies have indicated that it indeed naturally changes in response to environmental stresses. Whether or not the altered methylation pattern during the vegetative growth is heritable was also questioned, and studies on toadflax and rice affirmed the question, showing stable maintenance of hypermethylation in the former and hypomethylation in the latter for 250 and 10 years, respectively. The observation strongly suggested that acquired traits can be heritable as far as the acquired methylation pattern is stably transmitted. This concept is consistent with the Lamarck's theory of the inheritance of acquired traits, which therefore should be carefully reevaluated to reestablish his impaired reputation. PMID:20118668

2010-01-01

221

Progress on statistical learning systems as data mining tools for the creation of automatic databases in Fusion environments  

Microsoft Academic Search

Nowadays, processing all information of a fusion database is a much more important issue than acquiring more data. Although typically fusion devices produce tens of thousands of discharges, specialized databases for physics studies are normally limited to a few tens of shots. This is due to the fact that these databases are almost always generated manually, which is a very

J. Vega; A. Murari; G. A. Rattá; S. González; S. Dormido-Canto

2010-01-01

222

Critical Review of Complex Plasma (Dusty Plasma) Diagnostics and Manipulation Techniques for the Fusion Community and Others  

Microsoft Academic Search

This paper surveys the present state of the art of diagnostics and removal techniques for particles suspended in plasma. Research on ldquodusty plasmasrdquo is necessary for ITER and fusion reactors of the future. The aim is to transfer the knowledge acquired in complex (dusty) plasma research and low temperature plasma community to the broad fusion community, which is being mobilized

Beatrice Maria Annaratone; Wolfgang Jacob; CÉcile Arnas; Gregor Eugen Morfill

2009-01-01

223

The functional alterations associated with motor imagery training: a comparison between motor execution and motor imagery of sequential finger tapping  

NASA Astrophysics Data System (ADS)

Motor imagery training, as an effective strategy, has been more and more applied to mental disorders rehabilitation and motor skill learning. Studies on the neural mechanism underlying motor imagery have suggested that such effectiveness may be related to the functional congruence between motor execution and motor imagery. However, as compared to the studies on motor imagery, the studies on motor imagery training are much fewer. The functional alterations associated with motor imagery training and the effectiveness of motor imagery training on motor performance improvement still needs further investigation. Using fMRI, we employed a sequential finger tapping paradigm to explore the functional alterations associated with motor imagery training in both motor execution and motor imagery task. We hypothesized through 14 consecutive days motor imagery training, the motor performance could be improved and the functional congruence between motor execution and motor imagery would be sustained form pre-training phase to post-training phase. Our results confirmed the effectiveness of motor imagery training in improving motor performance and demonstrated in both pre and post-training phases, motor imagery and motor execution consistently sustained the congruence in functional neuroanatomy, including SMA (supplementary motor cortex), PMA (premotor area); M1( primary motor cortex) and cerebellum. Moreover, for both execution and imagery tasks, a similar functional alteration was observed in fusiform through motor imagery training. These findings provided an insight into the effectiveness of motor imagery training and suggested its potential therapeutic value in motor rehabilitation.

Zhang, Hang; Yao, Li; Long, Zhiying

2011-03-01

224

Bent shaft motor  

DOEpatents

A nonelectromagnetic motor comprising a base, a bent shaft which is rotable relative to the base wherein the bent shaft comprises a straight portion aligned with a main axis and an offset portion that is offset with respect to the main axis; and a drive means for driving the offset portion of the bent shaft along a generally circular path in a plane perpendicular to the main axis to rotate the bent shaft. The bent shaft and drive means for driving the bent shaft can be selected from piezoelectric, magnetostrictive, rheological and shape memory alloys. The drive means of the nonelectromagnetic motor can additionally comprise a shell which shell surrounds and houses the bent shaft and precesses or gyrates which in turn causes the bent drive shaft to rotate. The nonelectromagnetic motor does not rely on friction for the application of torque upon a rotor.

Benavides, Gilbert L. (Albuquerque, NM)

1998-01-01

225

Bent shaft motor  

DOEpatents

A nonelectromagnetic motor comprising a base, a bent shaft which is rotatable relative to the base wherein the bent shaft comprises a straight portion aligned with a main axis and an offset portion that is offset with respect to the main axis; and a drive means for driving the offset portion of the bent shaft along a generally circular path in a plane perpendicular to the main axis to rotate the bent shaft. The bent shaft and drive means for driving the bent shaft can be selected from piezoelectric, magnetostrictive, rheological and shape memory alloys. The drive means of the nonelectromagnetic motor can additionally comprise a shell which shell surrounds and houses the bent shaft and precesses or gyrates which in turn causes the bent drive shaft to rotate. The nonelectromagnetic motor does not rely on friction for the application of torque upon a rotor. 11 figs.

Benavides, G.L.

1998-05-05

226

Basics of AC Motors  

NSDL National Science Digital Library

This course is one of the quickStep series offered by Siemens in AC Motors. These are FREE on-line industrial knowledge building tutorials. quickSTEPs are a great start for industry novices moving into technical jobs or staff in operational support rolls. They can also be very effectively used as out of class assignments for review or to build fundamental skills. Each course includes: an online tutorial organized as a number of units, lessons with self check quiz questions, a glossary of terms, a self-check final exam with scoring, an extensive downloadable PDF study guide. This course covers: motor basics, NEMA motors, Siemens motorr, final exam, a glossary, plus a 116 page study guide.

2008-11-26

227

Homopolar motors and generators. January 1975-September 1988 (Citations from the INSPEC: Information Services for the Physics and Engineering Communities data base). Report for January 1975-September 1988  

SciTech Connect

This bibliography contains citations concerning design, analysis, construction, testing, and applications of homopolar motors and generators. Energy storage for nuclear fusion and industrial welding facilities are discussed. Applications of homopolar motors in transportation are presented. Topics also include magnetic circuit analysis, superconducting windings, and environmental testing. (This updated bibliography contains 213 citations, 47 of which are new entries to the previous edition.)

Not Available

1988-10-01

228

Homopolar motors and generators. January 1975-November 1989 (Citations from the INSPEC: Information Services for the Physics and Engineering Communities data base). Report for January 1975-November 1989  

SciTech Connect

This bibliography contains citations concerning design, analysis, construction, testing, and applications of homopolar motors and generators. Energy storage for nuclear fusion and industrial welding facilities are discussed. Applications of homopolar motors in transportation are presented. Topics also include magnetic circuit analysis, superconducting windings, and environmental testing. (This updated bibliography contains 271 citations, 58 of which are new entries to the previous edition.)

Not Available

1989-11-01

229

Design and prototyping methods for brushless motors and motor control  

E-print Network

In this report, simple, low-cost design and prototyping methods for custom brushless permanent magnet synchronous motors are explored. Three case-study motors are used to develop, illustrate and validate the methods. Two ...

Colton, Shane W. (Shane William)

2010-01-01

230

Motor current signature analysis method for diagnosing motor operated devices  

DOEpatents

A motor current noise signature analysis method and apparatus for remotely monitoring the operating characteristics of an electric motor-operated device such as a motor-operated valve. Frequency domain signal analysis techniques are applied to a conditioned motor current signal to distinctly identify various operating parameters of the motor driven device from the motor current signature. The signature may be recorded and compared with subsequent signatures to detect operating abnormalities and degradation of the device. This diagnostic method does not require special equipment to be installed on the motor-operated device, and the current sensing may be performed at remote control locations, e.g., where the motor-operated devices are used in accessible or hostile environments.

Haynes, Howard D. (Kingston, TN); Eissenberg, David M. (Oak Ridge, TN)

1990-01-01

231

Fusion Science Education Outreach  

NASA Astrophysics Data System (ADS)

This presentation will focus on education outreach activities at General Atomics that have been expanded to include the general population on science education with a focus on fusion energy. Outreach materials are distributed upon request both nationally and internationally. These materials include a notebook containing copies of DIII--D tour panels, fusion poster, new fusion energy video, new fusion energy brochure, and the electromagnetic spectrum curriculum. The 1996 Fusion Forum (held in the House Caucus Room) included a student/ teacher lunch with Energy Secretary Hazel O'Leary and a private visit to the Forum exhibits. The continuing partnership with Kearny High School includes lectures, job shadowing, internship, equipment donations and an award-winning electric car-racing program. Development of distribution by CD of the existing interactive fusion energy kiosk and a virtual reality tour of the DIII--D facility are underway. The DIII--D fusion education WWW site includes e-mail addresses to ``Ask the Wizard,'' and/or receive GA's outreach materials. Steve Rodecker, a local science teacher, aided by DIII--D fusion staff, won his second Tapestry Award; he also was named the ``1995 National Science Teacher of the Year'' and will be present to share his experiences with the DIII--D educational outreach program.

Danielson, C. A.; DIII-D Education Group

1996-11-01

232

Fusion in the Sun!  

NSDL National Science Digital Library

This simulation illustrates the general conditions necessary to begin fusion in the sun and other stars. You can vary the amount of hydrogen and the temperature in order to start a reaction. Click the "Instructions" button in the top right hand corner for more information on fusion and what the simulation shows. Java is required to use this applet.

Scharein, Rob

2010-03-31

233

Image fusion across bands  

Microsoft Academic Search

The goal of image fusion is to integrate complementary information from multisensor data such that the new image is more suitable for the purpose of human perception and computer processing tasks such as segmentation, feature extraction and object recognition. In this paper, we present an image fusion technique using the concept of information across the bands. This algorithm is relevant

Mohd. Shahid; S. Gupta

2005-01-01

234

Fusion Power Deployment  

SciTech Connect

Fusion power plants could be part of a future portfolio of non-carbon dioxide producing energy supplies such as wind, solar, biomass, advanced fission power, and fossil energy with carbon dioxide sequestration. In this paper, we discuss key issues that could impact fusion energy deployment during the last half of this century. These include geographic issues such as resource availability, scale issues, energy storage requirements, and waste issues. The resource needs and waste production associated with fusion deployment in the U.S. should not pose serious problems. One important feature of fusion power is the fact that a fusion power plant should be locatable within most local or regional electrical distribution systems. For this reason, fusion power plants should not increase the burden of long distance power transmission to our distribution system. In contrast to fusion power, regional factors could play an important role in the deployment of renewable resources such as wind, solar and biomass or fossil energy with CO2 sequestration. We examine the role of these regional factors and their implications for fusion power deployment.

J.A. Schmidt; J.M. Ogden

2002-02-06

235

Status of Fusion Technology.  

National Technical Information Service (NTIS)

The current status of fusion technology is surveyed. Limited reserves of fossil fuel and dangers of proliferation from nuclear reactors have brought into focus the need to develop an optional energy source. Fusion is being looked upon as an optional energ...

A. Mohan

1978-01-01

236

Cognitive motor processes: the role of motor imagery in the study of motor representations.  

PubMed

Motor imagery is viewed as a window to cognitive motor processes and particularly to motor control. Mental simulation theory [Jeannerod, M., 2001. Neural simulation of action: a unifying mechanism for motor cognition. NeuroImage 14, 103-109] stresses that cognitive motor processes such as motor imagery and action observation share the same representations as motor execution. This article presents an overview of motor imagery studies in cognitive psychology and neuroscience that support and extend predictions from mental simulation theory. In general, behavioral data as well as fMRI and TMS data demonstrate that motor areas in the brain play an important role in motor imagery. After discussing results on a close overlap between mental and actual performance durations, the review focuses specifically on studies reporting an activation of primary motor cortex during motor imagery. This focus is extended to studies on motor imagery in patients. Motor imagery is also analyzed in more applied fields such as mental training procedures in patients and athletes. These findings support the notion that mental training procedures can be applied as a therapeutic tool in rehabilitation and in applications for power training. PMID:19167426

Munzert, Jörn; Lorey, Britta; Zentgraf, Karen

2009-05-01

237

ac bidirectional motor controller  

NASA Astrophysics Data System (ADS)

Test data are presented and the design of a high-efficiency motor/generator controller at NASA-Lewis for use with the Space Station power system testbed is described. The bidirectional motor driver is a 20 kHz to variable frequency three-phase ac converter that operates from the high-frequency ac bus being designed for the Space Station. A zero-voltage-switching pulse-density-modulation technique is used in the converter to shape the low-frequency output waveform.

Schreiner, K.

238

ac bidirectional motor controller  

NASA Technical Reports Server (NTRS)

Test data are presented and the design of a high-efficiency motor/generator controller at NASA-Lewis for use with the Space Station power system testbed is described. The bidirectional motor driver is a 20 kHz to variable frequency three-phase ac converter that operates from the high-frequency ac bus being designed for the Space Station. A zero-voltage-switching pulse-density-modulation technique is used in the converter to shape the low-frequency output waveform.

Schreiner, K.

1988-01-01

239

Monitoring thermal impact resulting from solid rocket motor test operations  

NASA Technical Reports Server (NTRS)

The use of remote sensing is discussed with respect to determining the thermal conditions and the immediate environmental effects of large-scale rocket propulsion tests. Data acquired during a test firing of a solid rocket motor are presented including thermal data and surface temperatures from before, during, and after the firing. Thermal impact directly behind the nozzle is assessed, temperature values within the plume are determined, and data are generated for use in an environmental monitoring system which can analyze and forecast impact. The airborne multispectral scanner and thermocouples behind the solid rocket motor discerned that radiant temperatures are higher than predictions indicate and that the testing affects 34 acres of ground. The results are of use in determining the design and area required for developing testing facilities for rocket motors.

Davis, Bruce A.; Thurman, Charles; Carr, Hugh V.

1990-01-01

240

Fusion excitation function revisited  

E-print Network

We report on a comprehensive systematics of fusion-evaporation and/or fusion-fission cross sections for a very large variety of systems over an energy range 4-155 A.MeV. Scaled by the reaction cross sections, fusion cross sections do not show a universal behavior valid for all systems although a high degree of correlation is present when data are ordered by the system mass asymmetry.For the rather light and close to mass-symmetric systems the main characteristics of the complete and incomplete fusion excitation functions can be precisely determined. Despite an evident lack of data above 15A.MeV for all heavy systems the available data suggests that geometrical effects could explain the persistence of incomplete fusion at incident energies as high as 155A.MeV.

Ph. Eudes; Z. Basrak; F. Sébille; V. de la Mota; G. Royer; M. Zori?

2012-09-07

241

Intrinsic and acquired resistance mechanisms in enterococcus  

PubMed Central

Enterococci have the potential for resistance to virtually all clinically useful antibiotics. Their emergence as important nosocomial pathogens has coincided with increased expression of antimicrobial resistance by members of the genus. The mechanisms underlying antibiotic resistance in enterococci may be intrinsic to the species or acquired through mutation of intrinsic genes or horizontal exchange of genetic material encoding resistance determinants. This paper reviews the antibiotic resistance mechanisms in Enterococcus faecium and Enterococcus faecalis and discusses treatment options. PMID:23076243

Hollenbeck, Brian L.; Rice, Louis B.

2012-01-01

242

Immune reconstitution of acquired immune deficiency syndrome  

Microsoft Academic Search

Acquired immune deficiency syndrome (AIDS) is a chronic infectious disease, which the patients are infected with human immunodeficiency\\u000a virus (HIV). HIV damages the human’s immune function and causes CD4 cell decline in the number and function. Immune reconstitution\\u000a is an important treatment to AIDS. Bone marrow transplantation, adoptive immune cell therapy and cytokines infusion can all\\u000a assist the immune reconstitution;

Jie Wang; Hong-sheng Lin; Meng-yu Liu; Yong Li

2010-01-01

243

Treatment of the acquired immune deficiency syndrome  

Microsoft Academic Search

The acquired immune deficiency syndrome (AIDS) and AIDS-related complex (ARC) are sequelae of immune system injury initiated by a novel human retrovirus [human T-lymphotrophic virus strain III\\/lymphadenopathy-associated virus (HTLV III\\/LAV)]. The resulting spectrum of immune deficiency sets the stage for opportunistic infection and malignancy. In this review, we consider progress made in the treatment and prevention of AIDS and HTLV

Sudhir Gupta; Michael S. Gottlieb

1986-01-01

244

Domestically Acquired Fascioliasis in Northern California  

PubMed Central

Two cases of domestically acquired fascioliasis are reported. Patient One was a 63-year-old male who developed a febrile illness 2 months after eating watercress in Marin County. Patient Two was a 38-year-old male who had eaten watercress with Patient One, and also developed a febrile illness. Both patients had eosinophilia and liver lesions on imaging. Diagnosis was made by serology and treatment was with triclabendazole. PMID:23836562

Weisenberg, Scott A.; Perlada, David E.

2013-01-01

245

Fusion Plasma Performance Required for Fusion Power The performance achieved on MFE and IFE fusion experiments using DT fuel is compared with the fusion performance  

E-print Network

Fusion Plasma Performance Required for Fusion Power The performance achieved on MFE and IFE fusion experiments using DT fuel is compared with the fusion performance required for a Fusion Power Plant. Const. Cost $B Date

246

Investigations of image fusion  

NASA Astrophysics Data System (ADS)

The objective of image fusion is to combine information from multiple images of the same scene. The result of image fusion is a single image which is more suitable for the purpose of human visual perception or further image processing tasks. In this thesis, a region-based fusion algorithm using the wavelet transform is proposed. The identification of important features in each image, such as edges and regions of interest, are used to guide the fusion process. The idea of multiscale grouping is also introduced and a generic image fusion framework based on multiscale decomposition is studied. The framework includes all of the existing multiscale-decomposition- based fusion approaches we found in the literature which did not assume a statistical model for the source images. Comparisons indicate that our framework includes some new approaches which outperform the existing approaches for the cases we consider. Registration must precede our fusion algorithms. So we proposed a hybrid scheme which uses both feature-based and intensity-based methods. The idea of robust estimation of optical flow from time- varying images is employed with a coarse-to-fine multi- resolution approach and feature-based registration to overcome some of the limitations of the intensity-based schemes. Experiments show that this approach is robust and efficient. Assessing image fusion performance in a real application is a complicated issue. In this dissertation, a mixture probability density function model is used in conjunction with the Expectation- Maximization algorithm to model histograms of edge intensity. Some new techniques are proposed for estimating the quality of a noisy image of a natural scene. Such quality measures can be used to guide the fusion. Finally, we study fusion of images obtained from several copies of a new type of camera developed for video surveillance. Our techniques increase the capability and reliability of the surveillance system and provide an easy way to obtain 3-D information of objects in the space monitored by the system.

Zhang, Zhong

1999-12-01

247

Method for assessing motor insulation on operating motors  

DOEpatents

A method for monitoring the condition of electrical-motor-driven devices is disclosed. The method is achieved by monitoring electrical variables associated with the functioning of an operating motor, applying these electrical variables to a three phase equivalent circuit and determining non-symmetrical faults in the operating motor based upon symmetrical components analysis techniques. 15 figs.

Kueck, J.D.; Otaduy, P.J.

1997-03-18

248

MOTOR BIKES, MOPEDS, AND MOTOR SCOOTERS Registration and Operation  

E-print Network

://www.ct.gov/dot/LIB/dot/documents/dbikes/14-286.pdf Motorcycle - Motorcycle means a motor vehicle, with or without a side car, having not more equipment such as brakes, lights, horn and mirrors. Motorcycle class motor scooters are motor vehicles which in areas designated for larger vehicles including, but not limited to, cars, trucks, construction vehicles

Lozano-Robledo, Alvaro

249

On fusion of heart and brain signals for hybrid BCI  

Microsoft Academic Search

This paper investigates the fusion of ECG with EEG in devising a hybrid brain-computer interface (hBCI). Effortful motor imagery (MI) based BCI experiments were arranged with a twelve seconds of cue-based MI paradigm on six healthy individuals over two sessions of 160 trials, while ECG and EEG signals were simultaneously recorded. The proposed hBCI uses bispectrum based features from EEG

Shahjahan Shahid; Girijesh Prasad; Rakesh Kumar Sinha

2011-01-01

250

Cryptococcal meningitis and cerebral toxoplasmosis in a patient with acquired immune deficiency syndrome.  

PubMed Central

A 34-year-old homosexual male developed cryptococcal meningitis as the initial manifestation of Acquired Immune Deficiency Syndrome (AIDS). With antifungal therapy he improved. Six weeks later he developed focal motor seizures and progressive hemiplegia. Computer assisted tomography revealed multiple, ring-enhancing, low density lesions. The patient expired and at necropsy he was found to have multiple toxoplasma brain abscesses as well as chronic cryptococcal meningitis. This case demonstrates that in a patient with AIDS with pre-existing central nervous system infection who develops new neurological symptoms the possibility of a second and potentially treatable infection must be considered and its diagnosis pursued vigorously. Images PMID:3958746

Bahls, F; Sumi, S M

1986-01-01

251

Hybrid fusion and demosaicing algorithm with near-infrared image  

NASA Astrophysics Data System (ADS)

In this paper, we propose a unified framework for color filter array (CFA) interpolation and visible/NIR image combination. The proposed method aims to reconstruct a high quality image from raw CFA data and the corresponding NIR image, similar to a multi-spectral fusion of color and NIR images. Based on NIR image, we impose a sparse constraint of gradient difference to modify the traditional color interpolation. The experiments indicate the effectiveness of our hybrid scheme to acquire joint color and NIR information in real-time, and show that this hybrid process can generate a better color image when compared with treating interpolation and fusion separately.

Luo, X. Y.; Zhang, J.; Dai, Q. H.

2014-05-01

252

Electric motor model repair specifications  

SciTech Connect

These model repair specifications list the minimum requirements for repair and overhaul of polyphase AC squireel cage induction motors. All power ranges, voltages, and speeds of squirrel cage motors are covered.

NONE

1995-08-01

253

Mechanical solar motor: A concept  

NASA Technical Reports Server (NTRS)

Motor is proposed to convert radiation from sun directly into mechanical energy. Motor utilizes thermal expansion of liquid, heated by sun, as driving force. Unlike most thermally powered systems, it does not require that liquid be converted into vapor.

Hein, L. A.; Myers, W. N.

1975-01-01

254

Community-acquired and hospital-acquired candiduria: comparison of prevalence and clinical characteristics  

Microsoft Academic Search

Hospital-acquired candiduria (HAC) is a well-known finding, related to severely ill patients, prolonged antibiotic treatment,\\u000a use of catheters, and invasive procedures. However, the risk factors and clinical significance of community-acquired candiduria\\u000a (CAC) has not yet been described. In this study, the prevalence and clinical characteristics of CAC and HAC were compared.\\u000a Demographic and clinical data from all patients with positive

R. Colodner; Y. Nuri; B. Chazan; R. Raz

2008-01-01

255

Perceptual-Motor Dysfunction.  

ERIC Educational Resources Information Center

Discussed are theoretical and treatment aspects of perceptual motor dysfunction and rehabilitation in 4- to 12-year-old academically failing children involved in a 3-year investigation at the University of Kansas. The program is said to stress increasing the amount of stimulation received by sensory receptors of the vestibular, reflex, and haptic…

Pyfer, Jean L.

256

Solid Rocket Motor Test  

NASA Technical Reports Server (NTRS)

Shown is a test of the TEM-13 solid rocket motor at the ATK test facility in Utah in support of the Ares/CLV first stage. This image is extracted from high definition video and is the highest resolution available.

2008-01-01

257

Solid Rocket Motor Test  

NASA Technical Reports Server (NTRS)

Shown is a test of the TEM-13 Solid Rocket Motor in support of the Ares/CLV first stage at ATK, Utah . Constellation/Ares project. This image is extracted from a high definition video file and is the highest resolution available.

2008-01-01

258

Solid Rocket Motor Test  

NASA Technical Reports Server (NTRS)

Shown is a test of the TEM-13 Solid Rocket Motor in support of the Ares/CLV first stage at ATK, Utah . Constellaton/Ares project. This image is extracted from a high definition video file and is the highest resolution available.

2008-01-01

259

Gas-operated motor systems  

SciTech Connect

A gas-operated motor system of the stored energy type-as disclosed in U.S. Pat. No. 4,092,830-in which the gas exhausted from the motor is ducted to a chamber during operation of the motor and thereafter compressed back into the gas reservoir vessel. Recompression may be achieved, e.g., by providing the exhaust gas chamber with a movable piston, or by running the motor in the reverse mode as a compressor.

Rilett, J.W.

1980-09-30

260

Load-Responsive Motor Controller  

NASA Technical Reports Server (NTRS)

New circuit controls voltage applied to a three-phase induction motor in response to magnitude of current, so as to reduce power consumption when the motor is idling or operating at less than full load. Control circuit decreases rms applied voltage to match decreases in motor load over entire torque range. This considerably decreases power consumption in motors operating at a fraction of their rated torques.

Edge, T. M.

1982-01-01

261

Commercial Motor Vehicle Brake Assessment Tools  

E-print Network

Commercial Motor Vehicle Brake Assessment Tools Commercial Motor Vehicle Roadside Technology Corridor Safety Technology Showcase October 14, 2010 Commercial Motor Vehicle Roadside Technology Corridor #12;Overview · Commercial Motor Vehicle (CMV) Air Brake System · North American Standard Level-1

262

Clinical Outcome and Fusion Rates after the First 30 Extreme Lateral Interbody Fusions  

PubMed Central

Introduction. The lateral transpsoas approach for lumbar interbody fusion (XLIF) is gaining popularity. Studies examining a surgeon's early experience are rare. We aim to report treatment, complication, clinical, and radiographic outcomes in an early series of patients. Methods. Prospective data from the first thirty patients treated with XLIF by a single surgeon was reviewed. Outcome measures included pain, disability, and quality of life assessment. Radiographic assessment of fusion was performed by computed tomography. Results. Average follow-up was 11.5 months, operative time was 60 minutes per level and blood loss was 50?mL. Complications were observed: clinical subsidence, cage breakage upon insertion, new postoperative motor deficit and bowel injury. Approach side-effects were radiographic subsidence and anterior thigh sensory changes. Two patients required reoperation; microforaminotomy and pedicle screw fixation respectively. VAS back and leg pain decreased 63% and 56%, respectively. ODI improved 41.2% with 51.3% and 8.1% improvements in PCS and MCS. Complete fusion (last follow-up) was observed in 85%. Conclusion. The XLIF approach provides superior treatment, clinical outcomes and fusion rates compared to conventional surgical approaches with lowered complication rates. Mentor supervision for early cases and strict adherence to the surgical technique including neuromonitoring is essential. PMID:23213282

Malham, Gregory M.; Ellis, Ngaire J.; Parker, Rhiannon M.; Seex, Kevin A.

2012-01-01

263

Culham Centre for Fusion Energy Fusion -A clean future  

E-print Network

of producing our energy. Fossil fuels bring atmospheric pollution and the prospect of climate change-term energy source, to complement other low-carbon options such as fission, wind, solar and hydro. FusionCulham Centre for Fusion Energy Fusion - A clean future FUSION REACTION CPS13.755 Designed

264

Up-Fusion: An Evolving Multimedia Decision Fusion Xiangyu Wang  

E-print Network

Up-Fusion: An Evolving Multimedia Decision Fusion Method Xiangyu Wang National Univ. of Singapore multimedia's nature of hav- ing multiple information sources, fusion methods are criti- cal for its data analysis and understanding. However, most of the traditional fusion methods are static with respect to time

Rui, Yong

265

Alperin's Fusion Theorem and Fusion Systems David A. Craven  

E-print Network

Alperin's Fusion Theorem and Fusion Systems David A. Craven September 2010 Abstract This short note provides a new and straightforward proof of the original fusion theorem of Alperin, then considers so-called domestic intersections, which are special types of tame intersections that should play a role in fusion

Craven, David A.

266

Fusion-Fission Hybrids Driven By Heavy Ion Inertial Fusion  

Microsoft Academic Search

There is a desire to resolve fuel cycle issues for increasing the role of nuclear energy. The recent Laser Inertial Fusion-Fission Energy (LIFE) initiative that builds upon NIF ignition, is likely to rekindle national interest in developing intense, high power ion beam accelerators for fusion energy production and for fusion-fission hybrid concepts that combine an ion beam driven fusion neutron

P. A. Seidl

267

Motor Education: Educational Development Programs.  

ERIC Educational Resources Information Center

This booklet presents educational programs and activities focusing on motor skills for 5- to 9-year-old children and older children with learning problems. The premise of the activities is that the acquisition of motor skills is essential to basic learning. The role of language as a mediator and controller of motor development is emphasized. The…

Tansley, A. E.

268

Speed control for synchronous motors  

NASA Technical Reports Server (NTRS)

Feedback circuit controls fluctuations in speed of synchronous ac motor. Voltage proportional to phase angle is developed by phase detector, rectified, amplified, compared to threshold, and reapplied positively or negatively to motor excitation circuit. Speed control reduces wow and flutter of audio turntables and tape recorders, and enhances hunting in gyroscope motors.

Packard, H.; Schott, J.

1981-01-01

269

INSPECTION MEANS FOR INDUCTION MOTORS  

Microsoft Academic Search

an appartus is descripbe for inspcting electric motors and more ; expecially an appartus for detecting falty end rings inn suqirrel cage inductio ; motors while the motor is running. In its broua aspects, the mer would around ; ce of reference tedtor means also itons in the phase ition of the An electronic ; circuit for conversion of excess-3

1959-01-01

270

Spherical torus fusion reactor  

DOEpatents

The object of this invention is to provide a compact torus fusion reactor with dramatic simplification of plasma confinement design. Another object of this invention is to provide a compact torus fusion reactor with low magnetic field and small aspect ratio stable plasma confinement. In accordance with the principles of this invention there is provided a compact toroidal-type plasma confinement fusion reactor in which only the indispensable components inboard of a tokamak type of plasma confinement region, mainly a current conducting medium which carries electrical current for producing a toroidal magnet confinement field about the toroidal plasma region, are retained.

Martin Peng, Y.K.M.

1985-10-03

271

Nonelectric Applications of Fusion  

NASA Astrophysics Data System (ADS)

This is the final report of a panel set up by the U.S. Department of Energy (DOE) Fusion Energy Sciences Advisory Committee (FESAC) in response to a charge letter from Dr. James Decker, Acting Director of the DOE Office of Science. In that letter, Dr. Decker asked FESAC to consider "whether the Fusion Energy Sciences program should broaden its scope and activities to include non-electric applications of intermediate-term fusion devices." This report, submitted to FESAC July 31, 2003, and subsequently approved by them (Appendix B), presents FESAC's response to that charge.

McCarthy, Kathryn; Baker, Charles; Cheng, Edward; Kulcinski, Gerald; Logan, Grant; Miley, George; Perkins, John; Petti, Dave; Sheffield, John; Steiner, Don; Stacey, Weston; Waganer, Lester

2002-12-01

272

Fusion research activities in China  

Microsoft Academic Search

The fusion program in China has been executed in most areas of magnetic confinement fusion for more than 30 years. Basing on the situation of the power supply requirements of China, the fusion program is becoming an important and vital component of the nuclear power program in China. This paper reviews the status of fusion research and next step plans

Xiwen Deng

1998-01-01

273

Fusion Ignition Research Experiment Highlights  

E-print Network

Fusion Ignition Research Experiment Highlights FY 2004 Fusion Ignition Research Experiment #12;Need is critically needed to advance fusion science," and recommended that: "The United States should participate in the U.S. fusion program. The scientific and technological case for adding a burning plasma experiment

274

Network Fusion Pascal Fradet1  

E-print Network

Network Fusion Pascal Fradet1 and St´ephane Hong Tuan Ha2 1 INRIA Rh^one-Alpes 655, av. de l composition method which strives to reconcile modularity and efficiency. Our technique, network fusion fusion. Fusion allows to replace internal commu- nications by assignments and alleviates most time

Paris-Sud XI, Université de

275

Cold Fusion, A Journalistic Investigation  

Microsoft Academic Search

Author of the recent book, The Rebirth of Cold Fusion, and founder of New Energy Times, Steven B. Krivit presents a summary of cold fusion's, past, present and possible future. This talk will briefly review five highlights of the recent New Energy Times investigation into cold fusion research:1. Analysis of early studies that supposedly disproved cold fusion.2. Key early corroborations

Steven B. Krivit

2005-01-01

276

Motor technology for mining applications advances  

SciTech Connect

AC motors are steadily replacing DC motors in mining and mineral processing equipment, requiring less maintenance. The permanent magnet rotor, or the synchronous motor, has enabled Blador to introduce a line of cooling tower motors. Synchronous motors are soon likely to take over from the induction motor. 1 photo.

Fiscor, S.

2009-08-15

277

Energy Efficiency and Electric Motors  

NSDL National Science Digital Library

Electric motors account for about half of all energy consumption in the US. They can be found just about everywhere; in fact, motors control the majority of moving parts in machines. Being so widespread, it is possible to see substantial energy savings with just a small improvement in efficiency.A very comprehensive overview of electric motors can be found on the Machine Design Web site (1). It describes five common types of motors and how they operate. Some material is fairly technically oriented. For a more basic introduction, the Western Electric company (2) discusses the underlying theory and construction of electric motors. This is more suited for early high school students and above. The Department of Energy's Office of Industrial Technologies (3) provides many documents related to best practices for motor systems. Many energy saving techniques are outlined in these tip sheets and technical publications. Similar information is contained in this Australian Web site (4). Specific issues, such as motor rewinding, are discussed to correct many common mistakes made when conducting maintenance and repairs. Some interesting facts about general motor use and the "Premium-Efficiency Motor Initiative" are given on this Web site (5). The short article demonstrates that industry and government organizations realize the importance of improving motor efficiency. Along these same lines, a project is underway that hopes to make copper motor rotors economically feasible (6). Current rotors are made with aluminum, but switching to copper would help make motors more energy efficient. The Web site has many documents on the status of the project. The University of Missouri at Rolla has a research group investigating piezoelectric motors (7). Some details of piezoelectric motor design and manufacturing are given. A news article from March 2002 (8) tells of a revolutionary new kind of electric motor. This breakthrough could make electric cars cheaper than gasoline fueled vehicles.

Leske, Cavin.

2002-01-01

278

Fusion for Space Propulsion  

NASA Technical Reports Server (NTRS)

There is little doubt that humans will attempt to explore and develop the solar system in this century. A large amount of energy will be required for accomplishing this. The need for fusion propulsion is discussed. For a propulsion system, there are three important thermodynamical attributes: (1) The absolute amount of energy available, (2) the propellant exhaust velocity, and (3) the jet power per unit mass of the propulsion system (specific power). For human exploration and development of the solar system, propellant exhaust velocity in excess of 100 km/s and specific power in excess of 10 kW/kg are required. Chemical combustion can produce exhaust velocity up to about 5 km/s. Nuclear fission processes typically result in producing energy in the form of heat that needs to be manipulated at temperatures limited by materials to about 2,800 K. Using the energy to heat a hydrogen propellant increases the exhaust velocity by only a factor of about two. Alternatively the energy can be converted into electricity which is then used to accelerate particles to high exhaust velocity. The necessary power conversion and conditioning equipment, however, increases the mass of the propulsion system for the same jet power by more than two orders of magnitude over chemical system, thus greatly limits the thrust-to-weight ratio attainable. The principal advantage of the fission process is that its development is relatively mature and is available right now. If fusion can be developed, fusion appears to have the best of all worlds in terms of propulsion - it can provide the absolute amount, the propellant exhaust velocity, and the high specific jet power. An intermediate step towards pure fusion propulsion is a bimodal system in which a fission reactor is used to provide some of the energy to drive a fusion propulsion unit. The technical issues related to fusion for space propulsion are discussed. The technical priorities for developing and applying fusion for propulsion are somewhat different from those for terrestrial electrical power generation. Thus fusion schemes that are initially attractive for electrical power generation might not necessarily be attractive also for propulsion and vice versa, though the underlying fusion science and engineering enjoy much overlap. Parallel efforts to develop these qualitatively differently fusion schemes for the two applications could benefit greatly from each other due to the synergy in the underlying physics and engineering. Pulsed approaches to fusion have not been explored to the same degree as steady-state or long-pulse approaches to fusion in the fusion power research program. The concerns early on were several. One was that the pulsed power components might not have the service lifetimes meeting the requirements of a practical power generating plant. Another was that, for many pulsed fusion schemes, it was not clear whether the destruction of hardware per pulse could be minimized or eliminated or recycled to such an extent as to make economical electrical power generation feasible, Significant development of the underlying pulsed power component technologies have occurred in the last two decades because of defense and other energy requirements. The state of development of the pulsed power technologies are sufficiently advanced now to make it compelling to visit or re-visit pulsed fusion approaches for application to propulsion where the cost of energy is not so demanding a factor as in the case of terrestrial power application. For propulsion application, the overall mass of the fusion system is the critical factor. Producing fusion reactions require extreme states of matter. Conceptually, these extreme states of matter are more readily realizable in the pulsed states, at least within appropriate bounds, than in the steady states. Significant saving in system mass may result in such systems. Magnetic fields are effective in confining plasma energy, whereas inertial compression is an effective way of heating and containing the plasma. Intensive research in developing magnetic energy containme

Thio, Y. C. Francis; Schafer, Charles (Technical Monitor)

2001-01-01

279

Differential recruitment of the sensorimotor putamen and frontoparietal cortex during motor chunking in humans.  

PubMed

Motor chunking facilitates movement production by combining motor elements into integrated units of behavior. Previous research suggests that chunking involves two processes: concatenation, aimed at the formation of motor-motor associations between elements or sets of elements, and segmentation, aimed at the parsing of multiple contiguous elements into shorter action sets. We used fMRI to measure the trial-wise recruitment of brain regions associated with these chunking processes as healthy subjects performed a cued-sequence production task. A dynamic network analysis identified chunking structure for a set of motor sequences acquired during fMRI and collected over 3 days of training. Activity in the bilateral sensorimotor putamen positively correlated with chunk concatenation, whereas a left-hemisphere frontoparietal network was correlated with chunk segmentation. Across subjects, there was an aggregate increase in chunk strength (concatenation) with training, suggesting that subcortical circuits play a direct role in the creation of fluid transitions across chunks. PMID:22681696

Wymbs, Nicholas F; Bassett, Danielle S; Mucha, Peter J; Porter, Mason A; Grafton, Scott T

2012-06-01

280

Big Savings from Smart Motors  

NASA Technical Reports Server (NTRS)

Chesebrough-Pond's operates 32 plants across the nation and in those plants are more than 10,000 electric motors. In an effort to cut down on waste of electrical power used by these motors, Chesebrough organized a Corporate Advanced Technology Group to devise ways of improving productivity and cut manufacturing costs. Chesebrough used NASA's Marshall Space Flight Center's Power Factor Controller technology as a departure point for development of their own computerized motor controller that enables motors to operate at maximum efficiency regardless of the motor's applications or operating condition.

1984-01-01

281

Acquired plate-like osteoma cutis.  

PubMed

Plate-like osteoma cutis is a rare disorder that has been historically classified as a congenital syndrome. It has a possible relationship to a mutation in the gene (GNAS1) that encodes the ?-subunit of the stimulatory G protein, which regulates adenyl cyclase activity. We report a case of extensive plaque-like masses on the scalp and face with no abnormalities in calcium or phosphate metabolism and no preceding inflammatory cutaneous conditions. With less than ten reported cases, to our knowledge, this is one the few cases of acquired plate-like osteoma cutis described in the literature. PMID:22031627

Vashi, Neelam; Chu, Julie; Patel, Rishi

2011-01-01

282

Retinal arterial plaques in acquired immunodeficiency syndrome  

PubMed Central

The authors report the unusual observation discrete plaque like excrescencies along the retinal arterial wall in a young patient with acquired immunodeficiency syndrome. Though bilateral, in the right eye there was severe arteriolar narrowing and so these plaques were less identifiable. Fluorescein angiography did not reveal any arteriolar occlusion or areas of capillary occlusion in both eyes. There were no other signs of HIV associated microangiopathy and the patient did not have any concurrent cardiovascular or hematological abnormality. The cause of these plaques remains unexplained and we conjecture that they could represent macro immune-complex deposition along the arteriolar walls. PMID:24765430

Venkatesh, Pradeep; Pathak, Harish; Garg, Satpal

2012-01-01

283

Acquired universal melanosis (carbon baby syndrome).  

PubMed

Generalized pigmentation in a child may be attributed to a wide range of disorders. Acquired universal melanosis (AUM), also known as carbon baby syndrome, is one such rare condition, characterized by progressive hyperpigmentation of the skin since infancy with histopathologic features of heavy melanization of the entire epidermis. Since its initial description, only a few cases of AUM have been described in the English-language literature. We describe here a case of a young child with AUM for its rarity and a few unusual features. PMID:23331086

Ghosh, Sudip K; Ghoshal, Loknath; Bhunia, Deblina; Ghoshal, Astik M

2014-01-01

284

Origins of species: acquired genomes and individuality  

NASA Technical Reports Server (NTRS)

Entire genomes with their accompanying protein synthetic systems are transferred throughout the biosphere primarily as bacteria and protists which become symbionts as they irreversibly integrate into pre-existing organisms to form more complex individuals. Individualization is stabilized by simultaneous transmission of once-separate heterologous genetic systems. The origin of new species is hypothesized to correlate with the acquisition, integration and subsequent inheritance of such acquired microbial genomes. These processes were recognized by Mereschkovsky ("Symbiogenesis" in Russian, 1909) and by Wallin ("Symbionticism", see p. 181, this issue).

Margulis, L.

1993-01-01

285

Chronic acquired dyskeratotic papulosis of the face.  

PubMed

A Vietnam veteran who had been exposed to Agent Orange presented with a 28-year history of a papulonodular disease mainly affecting the face. Over those years, pin-sized papules had developed into dark nodules. Multiple biopsies of both fresh and mature papulonodules had been performed for routine histopathology and electron microscopy. Results had been positive for spongiosis with exocytosis, acanthosis, dyskeratotic keratinocytes, and marked incontinence of pigment, which together are suggestive of a previously unreported clinical entity that we term chronic acquired dyskeratotic papulosis. PMID:12078850

Ehrlich, Alison; Ma, Alice S R; Dixon, Anita; Topalovski, Margarita; Belsito, Donald V

2002-06-01

286

Triple arthrodesis for adult acquired flatfoot.  

PubMed

The primary goal of triple arthrodesis for stage III and IV adult acquired flatfoot is to obtain a well-aligned plantigrade foot that will support the ankle in optimal alignment. Ancillary procedures including posterior muscle group lengthening, medial displacement calcaneal osteotomy, medial column stabilization, peroneus brevis tenotomy, or transfer and harvest of regional bone graft are often necessary to achieve adequate realignment. Image intensification is helpful in confirming optimal realignment before fixation. Results of triple arthrodesis are enhanced with adequate preparation of joint surfaces, bone graft/orthobiologics, 2-point fixation of all 3 tritarsal joints, and a vertical heel position. PMID:24980931

Catanzariti, Alan R; Dix, Brian T; Richardson, Phillip E; Mendicino, Robert W

2014-07-01

287

Spectral Label Fusion  

E-print Network

We present a new segmentation approach that combines the strengths of label fusion and spectral clustering. The result is an atlas-based segmentation method guided by contour and texture cues in the test image. This offers ...

Wachinger, Christian

288

Fusion-breeder program  

SciTech Connect

The various approaches to a combined fusion-fission reactor for the purpose of breeding /sup 239/Pu and /sup 233/U are described. Design aspects and cost estimates for fuel production and electricity generation are discussed. (MOW)

Moir, R.W.

1982-11-19

289

Fusion: The Hydrogen Bomb  

NSDL National Science Digital Library

Just after World War II, nuclear scientists turned their attention from fission to fusion. This video segment adapted from AMERICAN EXPERIENCE looks at the beginnings of thermonuclear power generation.

Foundation, Wgbh E.

2004-02-20

290

Presented by Information Fusion  

E-print Network

of light-water reactors � Fusion of ultrasonic and infra-red sensors for robotics applications, Forecasting: Bates and Granger showed better forecasts can be made by combining different forecast methods

291

Fusion Energy Sciences  

NSDL National Science Digital Library

As part of the US Department of Energy, the Office of Science contains the Fusion Energy Sciences program, whose mission is to advance plasma science and fusion science technology. The program "supports research to understand the physics of plasmas; to identify and explore innovative and cost-effective development paths to fusion energy; and as a partner in international efforts, to advance the science and technology of energy-producing plasmas." Visitors to the Fusion Energy Sciences Web site will find current news related to the program, a program highlights document, several informative published papers, additional links, and more. If you're interested in energy, physics, or other related sciences, you'll definitely enjoy learning about the cutting edge science being undertaken within the department.

1969-12-31

292

Laser-Driven Fusion.  

ERIC Educational Resources Information Center

Discusses the present status and future prospects of laser-driven fusion. Current research (which is classified under three main headings: laser-matter interaction processes, compression, and laser development) is also presented. (HM)

Gibson, A. F.

1980-01-01

293

Description of the motor development of 3–12 month old infants with Down syndrome: The influence of the postural body position  

Microsoft Academic Search

The purpose of the present study was to describe the rate of motor development in infants with Down syndrome in the age range of 3–12 months and identify the difficulties both in performance and acquiring motor skills in prone, supine, sitting and standing positions. Nineteen infants with Down syndrome and 25 healthy full term typical infants were assessed using the

Eloisa Tudella; Karina Pereira; Renata Pedrolongo Basso; Geert J. P. Savelsbergh

2011-01-01

294

Description of the Motor Development of 3-12 Month Old Infants with Down Syndrome: The Influence of the Postural Body Position  

ERIC Educational Resources Information Center

The purpose of the present study was to describe the rate of motor development in infants with Down syndrome in the age range of 3-12 months and identify the difficulties both in performance and acquiring motor skills in prone, supine, sitting and standing positions. Nineteen infants with Down syndrome and 25 healthy full term typical infants were…

Tudella, Eloisa; Pereira, Karina; Basso, Renata Pedrolongo; Savelsbergh, Geert J. P.

2011-01-01

295

Fusion product spectra  

SciTech Connect

Accurate fusion product data is required for most fusion plasma simulations. The energy broadening of reaction products is demonstrated to be more complicated than the usual Gaussian broadening. The accurate integrals are performed to obtain , , and for all binary reactions in the four- and five-nucleon systems. Reaction cross sections were developed using R-Matrix models that include most recent measurements.

Talley, T.L.; Hale, G.M.

1988-01-01

296

Cold nuclear fusion  

Microsoft Academic Search

The possibility that negative muons could catalyze nuclear fusion was suggested on theoretical grounds by F.C. Frank and A.D. Sakharov in the late 1940s; the first experimental observations of the process followed serendipitously a decade later, in experiments at Berkeley by L.W. Alvarez. The fastest mechanism for muon-catalyzed, or 'cold' fusion, was suggested by Vesman (1967); it depends on a

Johann Rafelski; Steven E. Jones

1987-01-01

297

Fusion ignition research experiment  

SciTech Connect

Understanding the properties of high gain (alpha-dominated) fusion plasmas in an advanced toroidal configuration is the largest remaining open issue that must be addressed to provide the scientific foundation for an attractive magnetic fusion reactor. The critical parts of this science can be obtained in a compact high field tokamak which is also likely to provide the fastest and least expensive path to understanding alpha-dominated plasmas in advanced toroidal systems.

Dale Meade

2000-07-18

298

Glossary of fusion energy  

SciTech Connect

The Glossary of Fusion Energy is an attempt to present a concise, yet comprehensive collection of terms that may be beneficial to scientists and laymen who are directly or tangentially concerned with this burgeoning energy enterprise. Included are definitions of terms in theoretical plasma physics, controlled thermonuclear fusion, and some related physics concepts. Also, short descriptions of some of the major thermonuclear experiments currently under way in the world today are included.

Whitson, M.O. (ed.)

1985-02-01

299

Fusion power development pathways  

Microsoft Academic Search

During the national fusion program Technical Planning Activity (TPA) led by Argonne National Laboratory, it was proposed that a systematic activity be initiated called Development Pathways Analysis. This activity was defined as {open_quotes}developing and applying methodologies for assessing the cost, risk, and schedule impacts of differing approaches to fusion development.{close_quotes} The TPA report states that an {open_quotes}important objective is to

Stephen O. Dean

1993-01-01

300

Solar Fusion Cross Sections  

E-print Network

We review and analyze the available information for nuclear fusion cross sections that are most important for solar energy generation and solar neutrino production. We provide best values for the low-energy cross-section factors and, wherever possible, estimates of the uncertainties. We also describe the most important experiments and calculations that are required in order to improve our knowledge of solar fusion rates.

E. Adelberger; S. Austin; J. Bahcall; A. Balantekin; G. Bogaert; L. Brown; L. Buchmann; F. Cecil; A. Champagne; L. de Braeckeleer; C. Duba; S. Elliott; S. Freedman; M. Gai; G. Goldring; C. Gould; A. Gruzinov; W. Haxton; K. Heeger; E. Henley; C. Johnson; M. Kamionkowski; R. Kavanagh; S. Koonin; K. Kubodera; K. Langanke; T. Motobayashi; V. Pandharipande; P. Parker; R. Robertson; C. Rolfs; R. Sawyer; N. Shaviv; T. Shoppa; K. Snover; E. Swanson; R. Tribble; S. Turck-Chieze; J. Wilkerson

1998-05-12

301

Cold nuclear fusion  

SciTech Connect

Recent accelerator experiments on fusion of various elements have clearly demonstrated that the effective cross-sections of these reactions depend on what material the target particle is placed in. In these experiments, there was a significant increase in the probability of interaction when target nuclei are imbedded in a conducting crystal or are a part of it. These experiments open a new perspective on the problem of so-called cold nuclear fusion.

Tsyganov, E. N., E-mail: edward.tsyganov@utsouthwestern.edu [University of Texas Southwestern Medical Center at Dallas (United States)

2012-02-15

302

Acquired aplastic anaemia: still a serious disease.  

PubMed Central

Over 15 years, 42 children aged 2-14 years were diagnosed as having acquired aplastic anaemia. Adequate clinical details were available for 38 children who were categorised as very severe (n = 13), severe (n = 16), or nonsevere (n = 9) by the modified Camitta criteria. Treatment varied over the study period. Seven children received a bone marrow allograft from a full match family donor and three a matched unrelated donor transplant after failed treatment with antilymphocyte globulin. The remainder were treated with antilymphocyte globulin (n = 11), antilymphocyte globulin and oxymetholone (n = 4), oxymetholone with or without prednisolone (n = 12), or supportive treatment alone (n = 1). With a minimum follow up of one year since treatment, the five year survival was 70% for bone marrow transplantation with a family donor, 30% for antilymphocyte globulin, and 25% for oxymetholone. All three children with a matched unrelated donor transplant died. The prognosis of acquired aplastic anaemia remains poor for most children and new approaches to treatment are urgently required. PMID:1863100

Webb, D K; Hann, I M; Chessells, J M

1991-01-01

303

Case report Acquired immune deficiency syndrome in  

E-print Network

The first descriptions of the acquired immune deficiency syndrome (AIDS) were from the USA in 19811-3 although it is probable the first cases occurred in 1979.2 In Great Britain the first case occurred in 1981.4 In both countries there has been an exponential rise in the numbers of cases. The syndrome is defined by the Center for Diseases Control, Atlanta, Georgia, as characterised by opportunistic infections and malignant diseases in patients without a known cause for immunodeficiency.5 There is now little doubt that the disease is caused by a human T cell lymphotrophic virus type III passed by sexual transmission or parenteral infusion of infected blood products.6 The major groups known to be at risk of acquiring the disease in the western world are homosexuals, intravenous drug abusers, haemophiliacs, Haitians, transfusion recipients of infected blood, female sexual partners of affected males and infants of affected mothers.7 The full syndrome is often preceded by a prodromal illness described as the 'AIDS-related complex ' consisting of fatigue, anorexia, weight loss, night sweats and diarrhoea. Examination reveals

Northern Ireland; W W Dinsmore; L Kennedy; D R Mccluskey; G Dalzell; R D Maw

1986-01-01

304

Understanding social motor coordination.  

PubMed

Recently there has been much interest in social coordination of motor movements, or as it is referred to by some researchers, joint action. This paper reviews the cognitive perspective's common coding/mirror neuron theory of joint action, describes some of its limitations and then presents the behavioral dynamics perspective as an alternative way of understanding social motor coordination. In particular, behavioral dynamics' ability to explain the temporal coordination of interacting individuals is detailed. Two experiments are then described that demonstrate how dynamical processes of synchronization are apparent in the coordination underlying everyday joint actions such as martial art exercises, hand-clapping games, and conversations. The import of this evidence is that emergent dynamic patterns such as synchronization are the behavioral order that any neural substrate supporting joint action (e.g., mirror systems) would have to sustain. PMID:20817320

Schmidt, R C; Fitzpatrick, Paula; Caron, Robert; Mergeche, Joanna

2011-10-01

305

Advanced Motor Drives Studies  

NASA Technical Reports Server (NTRS)

This report presents an evaluation of advanced motor drive systems as a replacement for the hydrazine fueled APU units. The replacement technology must meet several requirements which are particular to the space applications and the Orbiter in general. Some of these requirements are high efficiency, small size, high power density. In the first part of the study several motors are compared, based on their characteristics and in light of the Orbiter requirements. The best candidate, the brushless DC is chosen because of its particularly good performance with regards to efficiency. Several power electronics drive technologies including the conventional three-phase hard switched and several soft-switched inverters are then presented. In the last part of the study, a soft-switched inverter is analyzed and compared to its conventional hard-switched counterpart. Optimal efficiency is a basic requirement for space applications and the soft-switched technology represents an unavoidable trend for the future.

Ehsani, M.; Tchamdjou, A.

1997-01-01

306

Ironless armature torque motor  

NASA Technical Reports Server (NTRS)

Four iron-less armature torque motors, four Hall device position sensor assemblies, and two test fixtures were fabricated. The design approach utilized samarium cobalt permanent magnets, a large airgap, and a three-phase winding in a stationary ironless armature. Hall devices were employed to sense rotor position. An ironless armature torque motor having an outer diameter of 4.25 inches was developed to produce a torque constant of 65 ounce-inches per ampere with a resistance of 20.5 ohms. The total weight, including structural elements, was 1.58 pounds. Test results indicated that all specifications were met except for generated voltage waveform. It is recommended that investigations be made concerning the generated voltage waveform to determine if it may be improved.

Fisher, R. L.

1972-01-01

307

Motor neurone disease  

PubMed Central

Motor neurone disease (MND), or amyotrophic lateral sclerosis (ALS), is a neurodegenerative disorder of unknown aetiology. Progressive motor weakness and bulbar dysfunction lead to premature death, usually from respiratory failure. Confirming the diagnosis may initially be difficult until the full clinical features are manifest. For all forms of the disease there is a significant differential diagnosis to consider, including treatable conditions, and therefore specialist neurological opinion should always be sought. Clear genetic inheritance has been demonstrated in a minority of patients with familial ALS but elucidation of the biological basis of genetic subtypes is also providing important information which may lead to treatments for sporadic forms of the disease. In the absence of curative or disease modifying therapy, management is supportive and requires a multidisciplinary approach. If, as seems likely, complex inherited and environmental factors contribute to the pathogenesis of MND, future treatment may involve a combination of molecular based treatments or restoration of cellular integrity using stem cell grafts. PMID:12357010

Talbot, K

2002-01-01

308

ITER Fusion Energy  

ScienceCinema

ITER (in Latin ?the way?) is designed to demonstrate the scientific and technological feasibility of fusion energy. Fusion is the process by which two light atomic nuclei combine to form a heavier over one and thus release energy. In the fusion process two isotopes of hydrogen ? deuterium and tritium ? fuse together to form a helium atom and a neutron. Thus fusion could provide large scale energy production without greenhouse effects; essentially limitless fuel would be available all over the world. The principal goals of ITER are to generate 500 megawatts of fusion power for periods of 300 to 500 seconds with a fusion power multiplication factor, Q, of at least 10. Q ? 10 (input power 50 MW / output power 500 MW). The ITER Organization was officially established in Cadarache, France, on 24 October 2007. The seven members engaged in the project ? China, the European Union, India, Japan, Korea, Russia and the United States ? represent more than half the world?s population. The costs for ITER are shared by the seven members. The cost for the construction will be approximately 5.5 billion Euros, a similar amount is foreseen for the twenty-year phase of operation and the subsequent decommissioning.

Dr. Norbert Holtkamp

2010-01-08

309

Magnetized Target Fusion  

NASA Technical Reports Server (NTRS)

Magnetized target fusion (MTF) is under consideration as a means of building a low mass, high specific impulse, and high thrust propulsion system for interplanetary travel. This unique combination is the result of the generation of a high temperature plasma by the nuclear fusion process. This plasma can then be deflected by magnetic fields to provide thrust. Fusion is initiated by a small traction of the energy generated in the magnetic coils due to the plasma's compression of the magnetic field. The power gain from a fusion reaction is such that inefficiencies due to thermal neutrons and coil losses can be overcome. Since the fusion reaction products are directly used for propulsion and the power to initiate the reaction is directly obtained from the thrust generation, no massive power supply for energy conversion is required. The result should be a low engine mass, high specific impulse and high thrust system. The key is to successfully initiate fusion as a proof-of-principle for this application. Currently MSFC is implementing MTF proof-of-principle experiments. This involves many technical details and ancillary investigations. Of these, selected pertinent issues include the properties, orientation and timing of the plasma guns and the convergence and interface development of the "pusher" plasma. Computer simulations of the target plasma's behavior under compression and the convergence and mixing of the gun plasma are under investigation. This work is to focus on the gun characterization and development as it relates to plasma initiation and repeatability.

Griffin, Steven T.

2002-01-01

310

Motors and Movement  

Microsoft Academic Search

\\u000a Your 3D printer is now ready for the motors that will control movement and allow the Plastic Extruder to “print” on the tabletop.\\u000a There are three axes of movement: X, Y, and Z. The X-axis consists of the Table that will move forwards and backwards (front\\u000a to back), the Y-axis will move the Extruder left and right, and the Z-axis

Patrick Hood-Daniel; James Floyd Kelly

311

Libert-E Motor  

ERIC Educational Resources Information Center

Kei Yun Wong has big dreams. She has been entrusted with the United States launch of Libert-E Motor, a new line of Chinese-manufactured electric scooters. With only $750,000 of her original budget of $3 million left, she needs to make sure that the launch succeeds, as it represents the initial step in her desire to create the first Chinese global…

Sieloff, Susan F.; Kinnunen, Raymond; Chevarley, Joseph

2011-01-01

312

and OSM-3 motors  

Microsoft Academic Search

he assembly and function of cilia on Caenorhabditis elegans neurons depends on the action of two kinesin-2 motors, heterotrimeric kinesin-II and homo- dimeric OSM-3-kinesin, which cooperate to move the same intrafl agellar transport (IFT) particles along microtu- bule (MT) doublets. Using competitive in vitro MT gliding assays, we show that purifi ed kinesin-II and OSM-3 co- operate to generate movement

Xiaoyu Pan; Guangshuo Ou; Gul Civelekoglu-Scholey; Oliver E. Blacque; Nicholas F. Endres; Li Tao; Alex Mogilner; Michel R. Leroux; Ronald D. Vale; Jonathan M. Scholey

313

Magnetostrictive direct drive motor  

Microsoft Academic Search

Highly magnetostrictive materials such as Tb.3Dy.7Feâ, commercially known as TERFENOL-D, have been used to date in a variety of devices such as high power actuators and linear motors. The larger magnetostriction available in twinned single crystal TERFENOL-D, approx. 2000 ppm at moderate magnetic field strengths, makes possible a new generation of magnetomechanical devices. NASA researchers are studying the potential of

D. Naik; P. H. Dehoff

1991-01-01

314

Stabilizer for motor vehicle  

SciTech Connect

This patent describes a stabilizer for a motor vehicle comprising: a rod-shaped torsion section extending in the transverse direction of a motor vehicle; a pair of arm sections continuous with both ends of the torsion section and extending in the longitudinal direction of the motor vehicle; a first member attached to the torsion section or at least one of the arm sections and formed with an axially penetrating cylindrical bore; a columnar second member inserted in the bore of the first member; at least one coil spring disposed between the inner peripheral surface of the bore of the first member and the outer peripheral surface of the second member and wound around the second member, at least one end of the coil spring being a free end; an operating member connected to the free end of the coil spring, at least a part of the operating member being located outside the first member; and drive means coupled to the operating member and adapted to apply a force in a direction such that the diameter of the coil spring is increased or reduced.

Takadera, I.; Kuroda, S.

1986-11-11

315

50 CFR 35.5 - Commercial enterprises, roads, motor vehicles, motorized equipment, motorboats, aircraft...  

Code of Federal Regulations, 2011 CFR

...motorized equipment, motorboats, aircraft, mechanical transport, structures, and installations...motorized equipment, motorboats, aircraft, mechanical transport, structures, and installations...conditions under which motorized equipment, mechanical transport, aircraft,...

2011-10-01

316

50 CFR 35.5 - Commercial enterprises, roads, motor vehicles, motorized equipment, motorboats, aircraft...  

Code of Federal Regulations, 2012 CFR

...motorized equipment, motorboats, aircraft, mechanical transport, structures, and installations...motorized equipment, motorboats, aircraft, mechanical transport, structures, and installations...conditions under which motorized equipment, mechanical transport, aircraft,...

2012-10-01

317

50 CFR 35.5 - Commercial enterprises, roads, motor vehicles, motorized equipment, motorboats, aircraft...  

Code of Federal Regulations, 2010 CFR

...motorized equipment, motorboats, aircraft, mechanical transport, structures, and installations...motorized equipment, motorboats, aircraft, mechanical transport, structures, and installations...conditions under which motorized equipment, mechanical transport, aircraft,...

2010-10-01

318

Wind motor applications for transportation  

SciTech Connect

Motion equation for a vehicle equipped with a wind motor allows, taking into account the drag coefficients, to determine the optimal wind drag velocity in the wind motor`s plane, and hence, obtain all the necessary data for the wind wheel blades geometrical parameters definition. This optimal drag velocity significantly differs from the flow drag velocity which determines the maximum wind motor power. Solution of the motion equation with low drag coefficients indicates that the vehicle speed against the wind may be twice as the wind speed. One of possible transportation wind motor applications is its use on various ships. A ship with such a wind motor may be substantially easier to steer, and if certain devices are available, may proceed in autonomous control mode. Besides, it is capable of moving within narrow fairways. The cruise speed of a sailing boat and wind-motored ship were compared provided that the wind velocity direction changes along a harmonic law with regard to the motion direction. Mean dimensionless speed of the wind-motored ship appears to be by 20--25% higher than that of a sailing boat. There was analyzed a possibility of using the wind motors on planet rovers in Mars or Venus atmospheric conditions. A Mars rover power and motor system has been assessed for the power level of 3 kW.

Lysenko, G.P.; Grigoriev, B.V.; Karpin, K.B. [Moscow Aviation Inst. (Russian Federation)

1996-12-31

319

Transcriptional repression coordinates the temporal switch from motor to serotonergic neurogenesis  

Microsoft Academic Search

In many regions of the developing CNS, distinct cell types are born at different times. The means by which discrete and stereotyped temporal switches in cellular identities are acquired remains poorly understood. To address this, we have examined how visceral motor neurons (VMNs) and serotonergic neurons, two neuronal subtypes, are sequentially generated from a common progenitor pool in the vertebrate

John Jacob; Anna L Ferri; Christopher Milton; Fabrice Prin; Patrick Pla; Wei Lin; Anthony Gavalas; Siew-Lan Ang; James Briscoe

2007-01-01

320

An Extended Motor Network Generates Beta and Gamma Oscillatory Perturbations during Development  

ERIC Educational Resources Information Center

This study examines the time course and neural generators of oscillatory beta and gamma motor responses in typically-developing children. Participants completed a unilateral flexion-extension task using each index finger as whole-head magnetoencephalography (MEG) data were acquired. These MEG data were imaged in the frequency-domain using spatial…

Wilson, Tony W.; Slason, Erin; Asherin, Ryan; Kronberg, Eugene; Reite, Martin L.; Teale, Peter D.; Rojas, Donald C.

2010-01-01

321

An Internet-Based Telerehabilitation System for the Assessment of Motor Speech Disorders: A Pilot Study  

ERIC Educational Resources Information Center

Purpose: This pilot study explored the feasibility and effectiveness of an Internet-based telerehabilitation application for the assessment of motor speech disorders in adults with acquired neurological impairment. Method: Using a counterbalanced, repeated measures research design, 2 speech-language pathologists assessed 19 speakers with…

Hill, Anne J.; Theodoros, Deborah G.; Russell, Trevor G.; Cahill, Louise M.; Ward, Elizabeth C.; Clark, Kathy M.

2006-01-01

322

Motor Coordination Dynamics Underlying Graphic Motion in 7- to 11-Year-Old Children  

ERIC Educational Resources Information Center

Using concepts and tools of a dynamical system approach in order to understand motor coordination underlying graphomotor skills, the aim of the current study was to establish whether the basic coordination dynamics found in adults is already established in children at elementary school, when handwriting is trained and eventually acquired. In the…

Danna, Jeremy; Enderli, Fabienne; Athenes, Sylvie; Zanone, Pier-Giorgio

2012-01-01

323

Acquiring ownership and the attribution of responsibility.  

PubMed

How is ownership established over non-owned things? We suggest that people may view ownership as a kind of credit given to agents responsible for making possession of a non-owned object possible. On this view, judgments about the establishment of ownership depend on attributions of responsibility. We report three experiments showing that people's judgments about the establishment of ownership are influenced by an agent's intent and control in bringing about an outcome, factors that also affect attributions of responsibility. These findings demonstrate that people do not just consider who was first to possess an object in judging who owns it, and are broadly consistent with the view that ownership is acquired through labor. The findings also suggest that rather than exclusively being the product of social conventions, judgments about the establishment of ownership over non-owned things also depend on the psychological processes underlying the attribution of responsibility. PMID:22591710

Palamar, Max; Le, Doan T; Friedman, Ori

2012-08-01

324

[Merits of acquiring ISO15189 accreditation].  

PubMed

In Japan, an ISO15189 accreditation system was started in 2005. To date, 47 hospitals have been accredited. In this session, I will present the merits of acquiring accreditation regarding ISO15189 based on our experience. Our hospital has 263 beds. The Clinical Examination Section consists of 12 staff (including 5 part-time workers): 7 in change of sample examination and 5 in charge of physiological examination. The annual number of samples is approximately 150,000. Samples collected on health checkups account for 90%. To improve the quality and service, assessment by third persons has been positively utilized in our hospital. Accreditation regarding ISO9001, ISO14001, ISO27001, privacy mark, hospital function assessment, the functional assessment of "ningen-dock"/health checkup hospitals, labor/hygiene service function assessment, and ISO15189 has been acquired. Patients may not recognize ISO. So, it must be utilized, considering that the acquisition of accreditation is not a goal but a starting point. Furthermore, cost-performance should be improved to achieve utilization-related merits. It is important to not only acquire accreditation but also help clinical staff and patients become aware of some changes/merits. Patients may consult a hospital for the following reasons: confidence in the hospital, and the staffs kind/polite attitudes. Long-term management strategies should be established without pursuing only short-term profits. I will introduce several merits of acquiring accreditation regarding ISO15189. Initially, incidental conditions for bids and appeal points include accreditation regarding ISO15189. Our corporation has participated in some competitive bids regarding health checkup business. In some companies, the bid conditions included ISO acquisition. In our hospital, clinical trials have been positively carried out. For participation in trials, hospitals must pass an institutional examination. However, ISO acquisition facilitates the preparation of documents, leading to successful results. The staffs consciousness has also change. I feel that they try to manage samples from blood collection until reporting laboratory data and interpret laboratory findings strictly. With ISO9001 and ISO14001 activities in our corporation, improvements in consciousness and service have increased the number of patients. Although items other than ISO also improved, ISO played an important role. We could participate in an international collaborative study, "Regional Difference in Laboratory Data and Establishment of Common Reference Ranges", which was mainly designed by Prof. Ichihara, Medical Research Department, Yamaguchi University Graduate School. This also resulted from ISO15189 acquisition. Furthermore, the Japanese Society of "Ningen-Dock" selected Dr. Yoshida, the chairman of the board of directors in our corporation, as a chairman of a meeting that will be held by this society in Asahikawa in 2010 as a result of ISO15189 acquisition by the Clinical Examination Section of our hospital, that is, high-level consciousness. It may be the first case for a middle-/small-scale general hospital to lead a meeting held by such a prestigious society. Thus, I have introduced the merits of ISO15189 acquisition. I hope that our experience will contribute to future ISO activities. PMID:20169948

Kitagawa, Masami

2010-01-01

325

Processed pseudogenes acquired somatically during cancer development  

PubMed Central

Cancer evolves by mutation, with somatic reactivation of retrotransposons being one such mutational process. Germline retrotransposition can cause processed pseudogenes, but whether this occurs somatically has not been evaluated. Here we screen sequencing data from 660 cancer samples for somatically acquired pseudogenes. We find 42 events in 17 samples, especially non-small cell lung cancer (5/27) and colorectal cancer (2/11). Genomic features mirror those of germline LINE element retrotranspositions, with frequent target-site duplications (67%), consensus TTTTAA sites at insertion points, inverted rearrangements (21%), 5? truncation (74%) and polyA tails (88%). Transcriptional consequences include expression of pseudogenes from UTRs or introns of target genes. In addition, a somatic pseudogene that integrated into the promoter and first exon of the tumour suppressor gene, MGA, abrogated expression from that allele. Thus, formation of processed pseudogenes represents a new class of mutation occurring during cancer development, with potentially diverse functional consequences depending on genomic context. PMID:24714652

Cooke, Susanna L.; Shlien, Adam; Marshall, John; Pipinikas, Christodoulos P.; Martincorena, Inigo; Tubio, Jose M.C.; Li, Yilong; Menzies, Andrew; Mudie, Laura; Ramakrishna, Manasa; Yates, Lucy; Davies, Helen; Bolli, Niccolo; Bignell, Graham R.; Tarpey, Patrick S.; Behjati, Sam; Nik-Zainal, Serena; Papaemmanuil, Elli; Teixeira, Vitor H.; Raine, Keiran; O'Meara, Sarah; Dodoran, Maryam S.; Teague, Jon W.; Butler, Adam P.; Iacobuzio-Donahue, Christine; Santarius, Thomas; Grundy, Richard G.; Malkin, David; Greaves, Mel; Munshi, Nikhil; Flanagan, Adrienne M.; Bowtell, David; Martin, Sancha; Larsimont, Denis; Reis-Filho, Jorge S.; Boussioutas, Alex; Taylor, Jack A.; Hayes, Neil D.; Janes, Sam M.; Futreal, P. Andrew; Stratton, Michael R.; McDermott, Ultan; Campbell, Peter J.; Provenzano, Elena; van de Vijver, Marc; Richardson, Andrea L.; Purdie, Colin; Pinder, Sarah; Mac Grogan, Gaetan; Vincent-Salomon, Anne; Larsimont, Denis; Grabau, Dorthe; Sauer, Torill; Garred, Øystein; Ehinger, Anna; Van den Eynden, Gert G.; van Deurzen, C.H.M; Salgado, Roberto; Brock, Jane E.; Lakhani, Sunil R.; Giri, Dilip D.; Arnould, Laurent; Jacquemier, Jocelyne; Treilleux, Isabelle; Caldas, Carlos; Chin, Suet-Feung; Fatima, Aquila; Thompson, Alastair M.; Stenhouse, Alasdair; Foekens, John; Martens, John; Sieuwerts, Anieta; Brinkman, Arjen; Stunnenberg, Henk; Span, Paul N.; Sweep, Fred; Desmedt, Christine; Sotiriou, Christos; Thomas, Gilles; Broeks, Annegein; Langerod, Anita; Aparicio, Samuel; Simpson, Peter T.; van ’t Veer, Laura; Erla Eyfjörd, Jórunn; Hilmarsdottir, Holmfridur; Jonasson, Jon G.; Børresen-Dale, Anne-Lise; Lee, Ming Ta Michael; Wong, Bernice Huimin; Tan, Benita Kiat Tee; Hooijer, Gerrit K.J.

2014-01-01

326

Dendritic ion channelopathy in acquired epilepsy  

PubMed Central

Summary Ion channel dysfunction or “channelopathy” is a proven cause of epilepsy in the relatively uncommon genetic epilepsies with Mendelian inheritance. But numerous examples of acquired channelopathy in experimental animal models of epilepsy following brain injury have also been demonstrated. Our understanding of channelopathy has grown due to advances in electrophysiology techniques that have allowed the study of ion channels in the dendrites of pyramidal neurons in cortex and hippocampus. The apical dendrites of pyramidal neurons comprise the vast majority of neuronal surface membrane area, and thus the majority of the neuronal ion channel population. Investigation of dendritic ion channels has demonstrated remarkable plasticity in ion channel localization and biophysical properties in epilepsy, many of which produce hyperexcitability and may contribute to the development and maintenance of the epileptic state. Here we review recent advances in dendritic physiology and cell biology, and their relevance to epilepsy. PMID:23216577

Poolos, Nicholas P.; Johnston, Daniel

2012-01-01

327

Acquiring case adaptation knowledge: A hybrid approach  

SciTech Connect

The ability of case-based reasoning (CBR) systems to apply cases to novel situations depends on their case adaptation knowledge. However, endowing CBR systems with adequate adaptation knowledge has proven to be a very difficult task. This paper describes a hybrid method for performing case adaptation, using a combination of rule-based and case-based reasoning. It shows how this approach provides a framework for acquiring flexible adaptation knowledge from experiences with autonomous adaptation and suggests its potential as a basis for acquisition of adaptation knowledge from interactive user guidance. It also presents initial experimental results examining the benefits of the approach and comparing the relative contributions of case learning and adaptation learning to reasoning performance.

Leake, D.B.; Kinley, A.; Wilson, D. [Indiana Univ., Bloomington, IN (United States)

1996-12-31

328

The acquired immunodeficiency syndrome in gay men.  

PubMed

The acquired immunodeficiency syndrome (AIDS) is a major health problem for gay men in the United States. About three fourths of all reported cases have occurred in this population, and the number is projected to double in the next year. In Manhattan and San Francisco, AIDS is now the leading cause of premature mortality in men aged 25 to 44 years who have never married. In a sample of a cohort of gay men enrolled in a San Francisco clinic, 2.7% of the men had the syndrome and 26% had related conditions in 1984. Antibody to human T-lymphotropic virus, type III/lymphadenopathy-associated virus was found in sera from 67% of the men, including 58% of asymptomatic men. Behavioral factors associated with an increased risk of AIDS include large numbers of sexual partners, receptive anal intercourse, and "fisting." The adoption of safer lifestyles is currently the basis of attempts to control the syndrome in gay men. PMID:2996396

Jaffe, H W; Hardy, A M; Morgan, W M; Darrow, W W

1985-11-01

329

Guidelines for prevention of hospital acquired infections.  

PubMed

These guidelines, written for clinicians, contains evidence-based recommendations for the prevention of hospital acquired infections Hospital acquired infections are a major cause of mortality and morbidity and provide challenge to clinicians. Measures of infection control include identifying patients at risk of nosocomial infections, observing hand hygiene, following standard precautions to reduce transmission and strategies to reduce VAP, CR-BSI, CAUTI. Environmental factors and architectural lay out also need to be emphasized upon. Infection prevention in special subsets of patients - burns patients, include identifying sources of organism, identification of organisms, isolation if required, antibiotic prophylaxis to be used selectively, early removal of necrotic tissue, prevention of tetanus, early nutrition and surveillance. Immunodeficient and Transplant recipients are at a higher risk of opportunistic infections. The post tranplant timetable is divided into three time periods for determining risk of infections. Room ventilation, cleaning and decontamination, protective clothing with care regarding food requires special consideration. Monitoring and Surveillance are prioritized depending upon the needs. Designated infection control teams should supervise the process and help in collection and compilation of data. Antibiotic Stewardship Recommendations include constituting a team, close coordination between teams, audit, formulary restriction, de-escalation, optimizing dosing, active use of information technology among other measure. The recommendations in these guidelines are intended to support, and not replace, good clinical judgment. The recommendations are rated by a letter that indicates the strength of the recommendation and a Roman numeral that indicates the quality of evidence supporting the recommendation, so that readers can ascertain how best to apply the recommendations in their practice environments. PMID:24701065

Mehta, Yatin; Gupta, Abhinav; Todi, Subhash; Myatra, Sn; Samaddar, D P; Patil, Vijaya; Bhattacharya, Pradip Kumar; Ramasubban, Suresh

2014-03-01

330

Identification of acquired antimicrobial resistance genes  

PubMed Central

Objectives Identification of antimicrobial resistance genes is important for understanding the underlying mechanisms and the epidemiology of antimicrobial resistance. As the costs of whole-genome sequencing (WGS) continue to decline, it becomes increasingly available in routine diagnostic laboratories and is anticipated to substitute traditional methods for resistance gene identification. Thus, the current challenge is to extract the relevant information from the large amount of generated data. Methods We developed a web-based method, ResFinder that uses BLAST for identification of acquired antimicrobial resistance genes in whole-genome data. As input, the method can use both pre-assembled, complete or partial genomes, and short sequence reads from four different sequencing platforms. The method was evaluated on 1862 GenBank files containing 1411 different resistance genes, as well as on 23 de-novo-sequenced isolates. Results When testing the 1862 GenBank files, the method identified the resistance genes with an ID?=?100% (100% identity) to the genes in ResFinder. Agreement between in silico predictions and phenotypic testing was found when the method was further tested on 23 isolates of five different bacterial species, with available phenotypes. Furthermore, ResFinder was evaluated on WGS chromosomes and plasmids of 30 isolates. Seven of these isolates were annotated to have antimicrobial resistance, and in all cases, annotations were compatible with the ResFinder results. Conclusions A web server providing a convenient way of identifying acquired antimicrobial resistance genes in completely sequenced isolates was created. ResFinder can be accessed at www.genomicepidemiology.org. ResFinder will continuously be updated as new resistance genes are identified. PMID:22782487

Zankari, Ea; Hasman, Henrik; Cosentino, Salvatore; Vestergaard, Martin; Rasmussen, Simon; Lund, Ole; Aarestrup, Frank M.; Larsen, Mette Voldby

2012-01-01

331

Preschoolers Acquire General Knowledge by Sharing in Pretense  

ERIC Educational Resources Information Center

Children acquire general knowledge about many kinds of things, but there are few known means by which this knowledge is acquired. In this article, it is proposed that children acquire generic knowledge by sharing in pretend play. In Experiment 1, twenty-two 3- to 4-year-olds watched pretense in which a puppet represented a "nerp" (an unfamiliar…

Sutherland, Shelbie L.; Friedman, Ori

2012-01-01

332

Assessing the Risk of Laboratory-Acquired Meningococcal Disease  

Microsoft Academic Search

Neisseria meningitidis is infrequently reported as a laboratory-acquired infection. Prompted by two cases in the United States in 2000, we assessed this risk among laboratorians. We identified cases of meningococcal disease that were possibly acquired or suspected of being acquired in a laboratory by placing an information request on e-mail discussion groups of infectious disease, microbiology, and infection control professional

James J. Sejvar; David Johnson; Tanja Popovic; J. Michael Miller; Frances Downes; Patricia Somsel; Robbin Weyant; David S. Stephens; Bradley A. Perkins; Nancy E. Rosenstein

2005-01-01

333

RESEARCH ARTICLE Open Access Severe community-acquired Enterobacter  

E-print Network

RESEARCH ARTICLE Open Access Severe community-acquired Enterobacter pneumonia: a plea for greater,3 and Didier Gruson1 Abstract Background: Patients with Enterobacter community-acquired pneumonia (EnCAP) were: health-care-associated pneumonia community-acquired pneumonia, Enterobacter cloacae, Enterobacter

Paris-Sud XI, Université de

334

Sport expert's motor imagery: functional imaging of professional motor skills and simple motor skills.  

PubMed

Numerous studies provide evidence that motor skill acquisition is associated with dynamic changes in cortical and subcortical regions. Athletes are a professional population who are engaged in extensive motor training for long periods. However, the neural substrates of extreme level motor performance have not been clarified. We used kinesthetic imagery task to induce the mental representation of sport expert's extraordinary performance in view of the shared substrates of executing movement and motor imagery. For the first time, we compared, through functional magnetic resonance imaging (fMRI), the pattern of cerebral activations in 12 professional divers and 12 normal people without extensive training, during imagery of professional skills and imagery of simple motor skills. The sport experts showed significant activation in the parahippocampus during imagery of professional skills relative to the novices, which might reflect the representation adapted to experience-related motor tasks. No significant difference was found between experts and novices when they imagined simple motor skills. These results indicated the experts might utilize their kinesthetic imagery more efficiently than novices, but only for the activity in which they had expertise. The sport experts also demonstrated more focused activation patterns in prefrontal areas in both of imagery tasks, which may be relevant to higher order of motor control during motor imagery. Moreover, this study suggested that the brains of sport experts could be regarded as the ideal subjects to explore the relationship between cerebral plasticity and learning of complex motor skills. PMID:19686705

Wei, Gaoxia; Luo, Jing

2010-06-23

335

Fusion, magnetic confinement  

SciTech Connect

An overview is presented of the principles of magnetic confinement of plasmas for the purpose of achieving controlled fusion conditions. Sec. 1 discusses the different nuclear fusion reactions which can be exploited in prospective fusion reactors and explains why special technologies need to be developed for the supply of tritium or {sup 3}He, the probable fuels. In Sec. 2 the Lawson condition, a criterion that is a measure of the quality of confinement relative to achieving fusion conditions, is explained. In Sec. 3 fluid equations are used to describe plasma confinement. Specific confinement configurations are considered. In Sec. 4 the orbits of particle sin magneti and electric fields are discussed. In Sec. 5 stability considerations are discussed. It is noted that confinement systems usually need to satisfy stability constraints imposed by ideal magnetohydrodynamic (MHD) theory. The paper culminates with a summary of experimental progress in magnetic confinement. Present experiments in tokamaks have reached the point that the conditions necessary to achieve fusion are being satisfied.

Berk, H.L.

1992-08-06

336

Myoblast fusion in Drosophila  

SciTech Connect

The body wall musculature of a Drosophila larva is composed of an intricate pattern of 30 segmentally repeated muscle fibers in each abdominal hemisegment. Each muscle fiber has unique spatial and behavioral characteristics that include its location, orientation, epidermal attachment, size and pattern of innervation. Many, if not all, of these properties are dictated by founder cells, which determine the muscle pattern and seed the fusion process. Myofibers are then derived from fusion between a specific founder cell and several fusion competent myoblasts (FCMs) fusing with as few as 3-5 FCMs in the small muscles on the most ventral side of the embryo and as many as 30 FCMs in the larger muscles on the dorsal side of the embryo. The focus of the present review is the formation of the larval muscles in the developing embryo, summarizing the major issues and players in this process. We have attempted to emphasize experimentally-validated details of the mechanism of myoblast fusion and distinguish these from the theoretically possible details that have not yet been confirmed experimentally. We also direct the interested reader to other recent reviews that discuss myoblast fusion in Drosophila, each with their own perspective on the process . With apologies, we use gene nomenclature as specified by Flybase (http://flybase.org) but provide Table 1 with alternative names and references.

Haralalka, Shruti [Stowers Institute for Medical Research, Kansas City, MO 64110 (United States)] [Stowers Institute for Medical Research, Kansas City, MO 64110 (United States); Abmayr, Susan M., E-mail: sma@stowers.org [Stowers Institute for Medical Research, Kansas City, MO 64110 (United States); Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, MO 66160 (United States)

2010-11-01

337

Crystal structure of the Candida albicans Kar3 kinesin motor domain fused to maltose-binding protein  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer The Candida albicans Kar3 motor domain structure was solved as a maltose-binding protein fusion. Black-Right-Pointing-Pointer The electrostatic surface and part of the ATPase pocket of the motor domain differs markedly from other kinesins. Black-Right-Pointing-Pointer The MBP-Kar3 interface highlights a new site for intramolecular or intermolecular interactions. -- Abstract: In the human fungal pathogen Candida albicans, the Kinesin-14 motor protein Kar3 (CaKar3) is critical for normal mitotic division, nuclear fusion during mating, and morphogenic transition from the commensal yeast form to the virulent hyphal form. As a first step towards detailed characterization of this motor of potential medical significance, we have crystallized and determined the X-ray structure of the motor domain of CaKar3 as a maltose-binding protein (MBP) fusion. The structure shows strong conservation of overall motor domain topology to other Kar3 kinesins, but with some prominent differences in one of the motifs that compose the nucleotide-binding pocket and the surface charge distribution. The MBP and Kar3 modules are arranged such that MBP interacts with the Kar3 motor domain core at the same site where the neck linker of conventional kinesins docks during the 'ATP state' of the mechanochemical cycle. This site differs from the Kar3 neck-core interface in the recent structure of the ScKar3Vik1 heterodimer. The position of MBP is also completely distinct from the Vik1 subunit in this complex. This may suggest that the site of MBP interaction on the CaKar3 motor domain provides an interface for the neck, or perhaps a partner subunit, at an intermediate state of its motile cycle that has not yet been observed for Kinesin-14 motors.

Delorme, Caroline; Joshi, Monika [Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada K7L 3N6 (Canada)] [Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada K7L 3N6 (Canada); Allingham, John S., E-mail: allinghj@queensu.ca [Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada K7L 3N6 (Canada)

2012-11-30

338

Fusion ProgramFusion Program Overview at Los Alamos  

E-print Network

) Facilities: ·Magnetized Target Fusion FRX-L plasma ·Inertial Electrostatic Confinement IEC POPs plasma: ·General information on Fusion Energy Sciences Program at LANL ·HighlightsHighlights ·Magneto Inertial

339

Evaluation of synthetic linear motor-molecule actuation energetics  

PubMed Central

By applying atomic force microscope (AFM)-based force spectroscopy together with computational modeling in the form of molecular force-field simulations, we have determined quantitatively the actuation energetics of a synthetic motor-molecule. This multidisciplinary approach was performed on specifically designed, bistable, redox-controllable [2]rotaxanes to probe the steric and electrostatic interactions that dictate their mechanical switching at the single-molecule level. The fusion of experimental force spectroscopy and theoretical computational modeling has revealed that the repulsive electrostatic interaction, which is responsible for the molecular actuation, is as high as 65 kcal·mol?1, a result that is supported by ab initio calculations. PMID:16735470

Brough, Branden; Northrop, Brian H.; Schmidt, Jacob J.; Tseng, Hsian-Rong; Houk, Kendall N.; Stoddart, J. Fraser; Ho, Chih-Ming

2006-01-01

340

Bearingless switched reluctance motor  

NASA Technical Reports Server (NTRS)

A switched reluctance motor has a stator with a first set of poles directed toward levitating a rotor horizontally within the stator. A disc shaped portion of a hybrid rotor is affected by the change in flux relative to the current provided at these levitation poles. A processor senses the position of the rotor and changes the flux to move the rotor toward center of the stator. A second set of poles of the stator are utilized to impart torque upon a second portion of the rotor. These second set of poles are driven in a traditional switched reluctance manner by the processor.

Morrison, Carlos R. (Inventor)

2004-01-01

341

Redundant motor drive system  

NASA Technical Reports Server (NTRS)

A drive system characterized by a base supporting a pair of pillars arranged in spaced parallelism, a shaft extended between and supported by the pillars for rotation about the longitudinal axis thereof, a worm gear affixed to the shaft and supported in coaxial relation therewith is described. A bearing housing of a sleeve like configuration is concentrically related to the shaft and is supported thereby for free rotation. A first and a second quiescent drive train, alternatively activatable, is provided for imparting rotation into said bearing housing. Each of the drive trains is characterized by a selectively energizable motor connected to a spur gear.

Calvert, J. A. (inventor)

1980-01-01

342

Ceramics for fusion applications  

SciTech Connect

Ceramics are required for a variety of uses in both near-term fusion devices and in commercial powerplants. These materials must retain adequate structural and electrical properties under conditions of neutron, particle, and ionizing irradiation; thermal and applied stresses; and physical and chemical sputtering. Ceramics such as Al/sub 2/O/sub 3/, MgAl/sub 2/O/sub 4/, BeO, Si/sub 3/N/sub 4/ and SiC are currently under study for fusion applications, and results to date show widely-varying response to the fusion environment. Materials can be identified today which will meet initial operating requirements, but improvements in physical properties are needed to achieve satisfactory lifetimes for critical applications.

Clinard, F.W. Jr.

1986-01-01

343

Heavy ion inertial fusion  

NASA Astrophysics Data System (ADS)

Inertial fusion has not yet been as well explored as magnetic fusion but can offer certain advantages as an alternative source of electric energy for the future. Present experiments use high-power beams from lasers and light-ion diodes to compress the deuterium-tritium (D-T) pellets but these will probably be unsuitable for a power plant. A more promising method is to use intense heavy-ion beams from accelerator systems similar to those used for nuclear and high-energy physics. The very high beam power needed poses new design questions, from the ion source through the accelerating system, the beam transport system, to the final focus. These problems will require extensive study, both theoretically and experimentally, over the next several years before an optimum design for an inertial fusion driver can be arrived at.

Keefe, D.; Sessler, A. M.

1980-07-01

344

CRYOGENICS FOR FUSION  

SciTech Connect

Fusion of Hydrogen to produce energy is one of the technologies under study to meet the mankind raising need in energy and as a substitute to fossil fuels for the future. This technology is under investigation for more than 30 years already, with, for example, the former construction of the experimental reactors Tore Supra, DIII-D and JET. With the construction of ITER to start, the next step to 'fusion for energy' will be done. In these projects, an extensive use of cryogenic systems is requested. Air Liquide has been involved as cryogenic partner in most of former and presently constructed fusion reactors. In the present paper, a review of the cryogenic systems we delivered to Tore Supra, JET, IPR and KSTAR will be presented.

Dauguet, P.; Bonneton, M.; Fauve, E.; Bernhardt, J. M.; Beauvisage, J.; Andrieu, F. [Air Liquide Advanced Technology Division BP15, ZI Les Engenieres, 38360 Sassenage (France); Gistau-Baguer, G. M.; Boissin, J. C. [Consultants, Grenoble (France)

2008-03-16

345

HEAVY ION INERTIAL FUSION  

SciTech Connect

Inertial fusion has not yet been as well explored as magnetic fusion but can offer certain advantages as an alternative source of electric energy for the future. Present experiments use high-power beams from lasers and light-ion diodes to compress the deuterium-tritium (D-T) pellets but these will probably be unsuitable for a power plant. A more promising method is to use intense heavy-ion beams from accelerator systems similar to those used for nuclear and high-energy physics; the present paper addresses itself to this alternative. As will be demonstrated the very high beam power needed poses new design questions, from the ion source through the accelerating system, the beam transport system, to the final focus. These problems will require extensive study, both theoretically and experimentally, over the next several years before an optimum design for an inertial fusion driver can be arrived at.

Keefe, D.; Sessler, A.M.

1980-07-01

346

Simulation of Fusion Plasmas  

ScienceCinema

The upcoming ITER experiment (www.iter.org) represents the next major milestone in realizing the promise of using nuclear fusion as a commercial energy source, by moving into the ?burning plasma? regime where the dominant heat source is the internal fusion reactions. As part of its support for the ITER mission, the US fusion community is actively developing validated predictive models of the behavior of magnetically confined plasmas. In this talk, I will describe how the plasma community is using the latest high performance computing facilities to develop and refine our models of the nonlinear, multiscale plasma dynamics, and how recent advances in experimental diagnostics are allowing us to directly test and validate these models at an unprecedented level.

Chris Holland

2010-01-08

347

Development of homopolar type bearingless motors  

Microsoft Academic Search

The authors have proposed bearingless motors, that is, magnetic bearings combined with motors in the same stator. It is possible to reduce their shaft length compared with a conventional motor with magnetic bearings, and achieve higher rotational speed. Bearingless motors generate radial force by adding n±2-pole flux on n-pole motor flux to make the flux distribution unbalanced. Several types of

Osaniu Ichikawa; Akira Chiba; Tadashi Fukao

1999-01-01

348

U.S. Fusion Energy Sciences Program Fusion Program Leaders  

E-print Network

.......................................................................................................................................266,947 287,644 318,950 +31,306 Science Laboratories InfrastructureU.S. Fusion Energy Sciences Program Fusion Program Leaders Conference Call February 6, 2006.ofes.fusion.doe.gov #12;Office of Science FY 2007 Congressional Budget Request FY 2005 Approp. FY 2006 Approp. FY 2007

349

Osteoclast fusion is based on heterogeneity between fusion partners.  

PubMed

Bone-resorbing osteoclasts are formed through fusion of mononucleated precursors. Their choice of partners during the fusion process remains unclear. We hypothesized that osteoclasts are selective in their choice of fusion partner and that this selectivity is based on heterogeneity among the cells with respect to their maturation stage and their expression and cellular organization of fusion factors. Support for this hypothesis was found from immunofluorescence staining of the osteoclast fusion factors CD47, dendritic cell-specific transmembrane protein (DC-STAMP), and syncytin-1. These stainings revealed heterogeneous localization patterns of all three factors within a given culture of osteoclasts. CD47 was found to be localized primarily in small osteoclasts and preosteoclasts, which were also positive for DC-STAMP but negative for cathepsin K expression. A role of CD47 in the early osteoclast fusion steps was also suggested from experiments with a CD47 blocking antibody, which resulted in an inhibition of the fusion of small osteoclasts. Conversely, blocking of connexin 43 affected the fusion of larger osteoclasts with four or more nuclei. The suggestion that different fusion factors function at different stages of osteoclast fusion supports the idea of heterogeneity in the osteoclast population; our results suggest that osteoclast fusion is indeed based on heterogeneity. Considering the in vivo environment in which osteoclasts develop and fuse, our findings seem very applicable and provide novel, important insight into key issues in bone and fusion research. PMID:24862648

Hobolt-Pedersen, Anne-Sofie; Delaissé, Jean-Marie; Søe, Kent

2014-07-01

350

FUSION SIMULATION PROJECT Integrated Simulation & Optimization of Fusion Systems  

E-print Network

#12;FUSION SIMULATION PROJECT Integrated Simulation & Optimization of Fusion Systems Final report of the FESAC ISOFS Subcommittee ISOFS (Integrated Simulation & Optimization of Fusion Systems) Subcommittee plasmas and increases in the scope and reliability of feasible simulations have been enabled by increased

351

Fusion Electricity A roadmap to the realisation of fusion energy  

E-print Network

Fusion Electricity A roadmap to the realisation of fusion energy #12;28 European countries signed Physique des Plasmas SWITZERLAND Dutch Institute for Fundamental Energy Research THE NETHERLANDS UNITED. China, for example, is launching an aggressive programme aimed at fusion electricity production well

352

Fusion project decision delayed ITER -NUCLEAR FUSION PROJECT  

E-print Network

-free energy - but the reactor will take 10 years to build. Pros and cons Member countries of the InternationalFusion project decision delayed ITER - NUCLEAR FUSION PROJECT The project is estimated to cost $5bn before a commercial reactor is built A decision on where to site the world's first big nuclear fusion

353

Fusion cross-sections for inertial fusion energy  

Microsoft Academic Search

The application of selective resonant tunneling model is extended from d 1 t fusion to other light nucleus fusion reactions, such as d 1 d fusion and d 1 3 He. In contrast to traditional formulas, the new formula for the cross-section needs only a few parameters to fit the experimental data in the energy range of interest. The features

XING ZHONG LI; BIN LIU; SI CHEN; QING MING WEI; HEINRICH HORA

2004-01-01

354

New developments in transplant-acquired allergies.  

PubMed

Transplant-acquired allergy (TAA) was firstly described as transplant-acquired food allergy (TAFA) after bone marrow transplantations and mostly observed in a transient form. The picture is complicated by numerous case reports of TAFA after the receipt of liver grafts from donors with no documented history of food allergy. The estimated prevalence of TAFA among young children in the literature has been documented in various studies ranging from 6% to 57%. Although TAA is mostly found to be associated with liver transplantation; it has been recently reported to be related with heart, intestinal, lung and even renal transplantations in adults. Previous reviews of published cases of liver TAA misleadingly emphasized the predominance of children and the absence of TAA in cardiac, pulmonary, and renal transplant recipients. In different studies, the male/female ratio is equal. Literature data suggest that children with TAFA typically present within the first year after surgery and are typically allergic to multiple foods. The pathogenesis of TAA is not still completely understood. Most of the studies support the concept that the functioning liver itself, and not only tacrolimus immunosuppression, is one of the main contributors to TAA in these patients. In the light of recent findings, other possible mechanisms can be summarized as following: (1) the recovery of delayed type hypersensitivity; (2) late manifestation of food allergy; (3) intestinal injury as well as inhibition of cellular energy production by tacrolimus; and (4) transfer of food-specific IgE or lymphocytes. Thus, interplay between hematopoietic cells from the transplanted organ and recipient specific factors (e.g., younger age and atopic background) seem to underlie the development of TAA. Most patients will have symptomatic improvement following reduced immunosuppression and an appropriately restricted diet. Nevertheless, some studies suggest that atopic diseases occur in some of pediatric liver transplant recipients, with manifestations including food allergy, eczema, allergic rhinitis, and asthma. More studies would be needed including greater number of patients to determine whether TAA is transient or not in pediatric/adult solid organ recipients. PMID:24255880

Ozdemir, Oner

2013-09-24

355

Intense fusion neutron sources  

NASA Astrophysics Data System (ADS)

The review describes physical principles underlying efficient production of free neutrons, up-to-date possibilities and prospects of creating fission and fusion neutron sources with intensities of 1015-1021 neutrons/s, and schemes of production and application of neutrons in fusion-fission hybrid systems. The physical processes and parameters of high-temperature plasmas are considered at which optimal conditions for producing the largest number of fusion neutrons in systems with magnetic and inertial plasma confinement are achieved. The proposed plasma methods for neutron production are compared with other methods based on fusion reactions in nonplasma media, fission reactions, spallation, and muon catalysis. At present, intense neutron fluxes are mainly used in nanotechnology, biotechnology, material science, and military and fundamental research. In the near future (10-20 years), it will be possible to apply high-power neutron sources in fusion-fission hybrid systems for producing hydrogen, electric power, and technological heat, as well as for manufacturing synthetic nuclear fuel and closing the nuclear fuel cycle. Neutron sources with intensities approaching 1020 neutrons/s may radically change the structure of power industry and considerably influence the fundamental and applied science and innovation technologies. Along with utilizing the energy produced in fusion reactions, the achievement of such high neutron intensities may stimulate wide application of subcritical fast nuclear reactors controlled by neutron sources. Superpower neutron sources will allow one to solve many problems of neutron diagnostics, monitor nano-and biological objects, and carry out radiation testing and modification of volumetric properties of materials at the industrial level. Such sources will considerably (up to 100 times) improve the accuracy of neutron physics experiments and will provide a better understanding of the structure of matter, including that of the neutron itself.

Kuteev, B. V.; Goncharov, P. R.; Sergeev, V. Yu.; Khripunov, V. I.

2010-04-01

356

Motor-operated valve (MOV) actuator motor and gearbox testing  

SciTech Connect

Researchers at the Idaho National Engineering and Environmental Laboratory tested the performance of electric motors and actuator gearboxes typical of the equipment installed on motor-operated valves used in nuclear power plants. Using a test stand that simulates valve closure loads against flow and pressure, the authors tested five electric motors (four ac and one dc) and three gearboxes at conditions a motor might experience in a power plant, including such off-normal conditions as operation at high temperature and reduced voltage. They also monitored the efficiency of the actuator gearbox. All five motors operated at or above their rated starting torque during tests at normal voltages and temperatures. For all five motors, actual torque losses due to voltage degradation were greater than the losses calculated by methods typically used for predicting motor torque at degraded voltage conditions. For the dc motor the actual torque losses due to elevated operating temperatures were greater than the losses calculated by the typical predictive method. The actual efficiencies of the actuator gearboxes were generally lower than the running efficiencies published by the manufacturer and were generally nearer the published pull-out efficiencies. Operation of the gearbox at elevated temperature did not affect the operating efficiency.

DeWall, K.; Watkins, J.C.; Bramwell, D. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States)

1997-07-01

357

Motor power control circuit for ac induction motors  

NASA Astrophysics Data System (ADS)

A motor power control of the type which functions by controlling the power factor wherein one of the parameters of power factor current on time is determined by the on time of a triac through which current is supplied to the motor. By means of a positive feedback circuit, a wider range of control is effected.

Nola, F. J.

1983-03-01

358

Motor power control circuit for ac induction motors  

NASA Technical Reports Server (NTRS)

A motor power control of the type which functions by controlling the power factor wherein one of the parameters of power factor current on time is determined by the on time of a triac through which current is supplied to the motor. By means of a positive feedback circuit, a wider range of control is effected.

Nola, F. J. (inventor)

1983-01-01

359

27. View, looking north, of motor house; the electric motor ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

27. View, looking north, of motor house; the electric motor and electric-powered winch are housed in section of building to the left. Photo by Jet Lowe, HAER, 1989. - Puget Sound Power & Light Company, White River Hydroelectric Project, 600 North River Avenue, Dieringer, Pierce County, WA

360

Fusion technology status and requirements  

SciTech Connect

This paper summarizes the status of fusion technology and discusses the requirements to be met in order to build a demonstration fusion plant. Strategies and programmatic considerations in pursuing engineering feasibility are also outlined.

Thomassen, K.I.

1982-01-26

361

Multisensor data fusion algorithm development  

SciTech Connect

This report presents a two-year LDRD research effort into multisensor data fusion. We approached the problem by addressing the available types of data, preprocessing that data, and developing fusion algorithms using that data. The report reflects these three distinct areas. First, the possible data sets for fusion are identified. Second, automated registration techniques for imagery data are analyzed. Third, two fusion techniques are presented. The first fusion algorithm is based on the two-dimensional discrete wavelet transform. Using test images, the wavelet algorithm is compared against intensity modulation and intensity-hue-saturation image fusion algorithms that are available in commercial software. The wavelet approach outperforms the other two fusion techniques by preserving spectral/spatial information more precisely. The wavelet fusion algorithm was also applied to Landsat Thematic Mapper and SPOT panchromatic imagery data. The second algorithm is based on a linear-regression technique. We analyzed the technique using the same Landsat and SPOT data.

Yocky, D.A.; Chadwick, M.D.; Goudy, S.P.; Johnson, D.K.

1995-12-01

362

Fusion Energy Educational Web Site  

NSDL National Science Digital Library

This site is a collection of resources about nuclear fusion. It provides a large set of definitions for the terms most commonly used in fusion research, and a course developed in conjunction with the Contemporary Physics Education Project.

Laboratory, Princeton P.; Laboratory, Lawrence L.

2003-10-10

363

Fusion welding process  

DOEpatents

A process for the fusion welding of nickel alloy steel members wherein a ferrite containing pellet is inserted into a cavity in one member and melted by a welding torch. The resulting weld nugget, a fusion of the nickel containing alloy from the members to be welded and the pellet, has a composition which is sufficiently low in nickel content such that ferrite phases occur within the weld nugget, resulting in improved weld properties. The steel alloys encompassed also include alloys containing carbon and manganese, considered nickel equivalents.

Thomas, Kenneth C. (Export, PA); Jones, Eric D. (Salem, PA); McBride, Marvin A. (Hempfield Township, Westmoreland County, PA)

1983-01-01

364

Fusion for Space Propulsion  

NASA Technical Reports Server (NTRS)

The need for fusion propulsion for interplanetary flights is discussed. For a propulsion system, there are three important system attributes: (1) The absolute amount of energy available, (2) the propellant exhaust velocity, and (3) the jet power per unit mass of the propulsion system (specific power). For efficient and affordable human exploration of the solar system, propellant exhaust velocity in excess of 100 km/s and specific power in excess of 10 kW/kg are required. Chemical combustion obviously cannot meet the requirement in propellant exhaust velocity. Nuclear fission processes typically result in producing energy in the form of heat that needs to be manipulated at temperatures limited by materials to about 2,800 K. Using the fission energy to heat a low atomic weight propellant produces propellant velocity of the order of 10 kinds. Alternatively the fission energy can be converted into electricity that is used to accelerate particles to high exhaust velocity. However, the necessary power conversion and conditioning equipment greatly increases the mass of the propulsion system. Fundamental considerations in waste heat rejection and power conditioning in a fission electric propulsion system place a limit on its jet specific power to the order of about 0.2 kW/kg. If fusion can be developed for propulsion, it appears to have the best of all worlds - it can provide the largest absolute amount of energy, the propellant exhaust velocity (> 100 km/s), and the high specific jet power (> 10 kW/kg). An intermediate step towards fusion propulsion might be a bimodal system in which a fission reactor is used to provide some of the energy to drive a fusion propulsion unit. There are similarities as well as differences between applying fusion to propulsion and to terrestrial electrical power generation. The similarities are the underlying plasma and fusion physics, the enabling component technologies, the computational and the diagnostics capabilities. These physics and engineering capabilities have been demonstrated for a fusion reactor gain (Q) of the order of unity (TFTR: 0.25, JET: 0.65, JT-60: Q(sub eq) approx. 1.25). These technological advances made it compelling for considering fusion for propulsion.

Thio, Y. C. Francis; Schmidt, George R.; Santarius, John F.; Turchi, Peter J.; Siemon, Richard E.; Rodgers, Stephen L. (Technical Monitor)

2002-01-01

365

Magnetically Catalyzed Fusion  

E-print Network

We calculate the reaction cross-sections for the fusion of hydrogen and deuterium in strong magnetic fields as are believed to exist in the atmospheres of neutron stars. We find that in the presence of a strong magnetic field ($B \\gsim 10^{12}$G), the reaction rates are many orders of magnitude higher than in the unmagnetized case. The fusion of both protons and deuterons are important over a neutron star's lifetime for ultrastrong magnetic fields ($B \\sim 10^{16}$G). The enhancement may have dramatic effects on thermonuclear runaways and bursts on the surfaces of neutron stars.

Jeremy S. Heyl; Lars Hernquist

1996-08-25

366

41 CFR 102-34.95 - What motor vehicle identification must the Department of Defense (DOD) display on motor vehicles...  

... 2014-01-01 false What motor vehicle identification must the Department...REGULATION PERSONAL PROPERTY 34-MOTOR VEHICLE MANAGEMENT Identifying and Registering Motor Vehicles Motor Vehicle Identification §...

2014-01-01

367

41 CFR 102-34.90 - What motor vehicle identification must we display on Government motor vehicles?  

... 2014-01-01 false What motor vehicle identification must we display...REGULATION PERSONAL PROPERTY 34-MOTOR VEHICLE MANAGEMENT Identifying and Registering Motor Vehicles Motor Vehicle Identification §...

2014-01-01

368

Cell Fusion and Stem Cells  

Microsoft Academic Search

\\u000a Differentiation, self-renewal and the ability to readily undergo cell fusion are properties of adult and embryonic stem cells.\\u000a Spontaneous fusion between stem cells, and fusion of stem cells with various differentiated cell types, has been observed\\u000a in many in vitro and in vivo contexts. Stem cell fusion is implicated in many crucial functions during normal development\\u000a and is increasingly being

Alain Silk; Anne E. Powell; Paige S. Davies; Melissa H. Wong

369

Community-acquired pneumonia in children.  

PubMed

Community-acquired pneumonia (CAP) remains a frequent cause of morbidity and mortality worldwide even in industrialised countries, and its incidence is highest among children aged <5 years. Over the last two years, three international guidelines have been updated with new evidence concerning the incidence, aetiology and management of childhood CAP, but there are still some major problems in standardisation. The main aim of this review is to consider the available data concerning the aetiology, diagnosis, evaluation of severity, and treatment of paediatric CAP. Analysis of the literature shows that there are a number of unanswered questions concerning the management of CAP, including its definition, the absence of a paediatric CAP severity score, the difficulty of identifying its aetiology, the emergence of resistance of the most frequent respiratory pathogens to the most widely used anti-infectious agents, and the lack of information concerning the changes in CAP epidemiology following the introduction of vaccines against respiratory pathogens. More research is clearly required in various areas, and further efforts are needed to increase vaccination coverage with the already available vaccines in order to reduce the occurrence of the disease. PMID:23962481

Cardinale, Fabio; Cappiello, Anna Rita; Mastrototaro, Maria Felicia; Pignatelli, Mariacristina; Esposito, Susanna

2013-10-01

370

[Acquired and congenital heart diseases during pregancy].  

PubMed

Heart diseases are the leading cause of maternal morbidity and mortality. The number of patients with congenital heart diseases reaching childbearing age, as well as the proportion of women with acquired conditions, such as ischemic heart disease, becoming pregnant is constantly increasing. All women with known heart disease should have pre-pregnancy counseling, to assess maternal and fetal risk. Women at moderate or high risk should be under the care of a specialist prenatal team with experience in managing women with heart disease during pregnancy. Conditions that are considered at particularly high risk (mortality >10%) include Marfan syndrome with dilated aortic root, severe left ventricular dysfunction, severe left heart obstructive lesions, and pulmonary hypertension. Peripartum cardiomyopathy is a rare and potentially fatal disease related to pregnancy and the postnatal period that presents with symptoms of congestion and/or hypoperfusion and may rapidly progress to acute and life-threatening heart failure. However, the majority of women with heart disease can tolerate pregnancy; therefore an adequate multidisciplinary approach with the gynecologist, anesthesiologist and cardiologist should be advocated in order to reduce maternal and fetal risks associated with pregnancy. PMID:23678534

De Feo, Stefania; Iacovoni, Attilio; Faggiano, Pompilio

2012-05-01

371

The Fusion Machine (extended abstract)  

E-print Network

The Fusion Machine (extended abstract) Philippa Gardner Cosimo Laneve Lucian Wischik March 27, 2002. In particular, we describe a dis- tributed abstract machine called the fusion machine. In it, only channels exist at runtime. It uses a form of concurrent constraints called fusions--equations on channel names

Gardner, Philippa

372

Physics in Action: Fusion Machines  

NSDL National Science Digital Library

This article from Physics Central provides a description of fusion machines and plasma power. The process and challenges to producing a sustained fusion reaction that could lead to electric power generation are explained. Current research being conducted with fusion machines is also presented along with links to additional information.

2007-04-26

373

Human-Centered Fusion Framework  

SciTech Connect

In recent years the benefits of fusing signatures extracted from large amounts of distributed and/or heterogeneous data sources have been largely documented in various problems ranging from biological protein function prediction to cyberspace monitoring. In spite of significant progress in information fusion research, there is still no formal theoretical framework for defining various types of information fusion systems, defining and analyzing relations among such types, and designing information fusion systems using a formal method approach. Consequently, fusion systems are often poorly understood, are less than optimal, and/or do not suit user needs. To start addressing these issues, we outline a formal humancentered fusion framework for reasoning about fusion strategies. Our approach relies on a new taxonomy for fusion strategies, an alternative definition of information fusion in terms of parameterized paths in signature related spaces, an algorithmic formalization of fusion strategies and a library of numeric and dynamic visual tools measuring the impact as well as the impact behavior of fusion strategies. Using a real case of intelligence analysis we demonstrate that the proposed framework enables end users to rapidly 1) develop and implement alternative fusion strategies, 2) understand the impact of each strategy, 3) compare the various strategies, and 4) perform the above steps without having to know the mathematical foundations of the framework. We also demonstrate that the human impact on a fusion system is critical in the sense that small changes in strategies do not necessarily correspond to small changes in results.

Posse, Christian; White, Amanda M.; Beagley, Nathaniel

2007-05-16

374

Objective image fusion performance measure  

Microsoft Academic Search

A measure for objectively assessing the pixel level fusion performance is defined. The proposed metric reflects the quality of visual information obtained from the fusion of input images and can be used to compare the performance of different image fusion algorithms. Experimental results clearly indicate that this metric is perceptually meaningful

C. S. Xydeas; V. Petrovic

2000-01-01

375

Image fusion using complex wavelets  

Microsoft Academic Search

The fusion of images is the process of combining two or more images into a single image retaining important features from each. Fusion is an impor- tant technique within many disparate fields such as remote sensing, robotics and medical applications. Wavelet based fusion techniques have been rea- sonably effective in combining perceptually important image features. Shift invariance of the wavelet

Paul R. Hill; Nishan Canagarajah; David R. Bull

2002-01-01

376

Inertial Confinement Fusion Experiments & Modeling  

E-print Network

Spectroscopy Ablator Characterization #12;What is Fusion? Fusion is the joining together of small, light nuclei-drive ICF delivers the energy of a laser (or ion beam) not directly to the fuel capsule, but ratherInertial Confinement Fusion Experiments & Modeling Using X-ray Absorption Spectroscopy of Thin

Cohen, David

377

Physics (selected articles). [Nuclear fusion  

Microsoft Academic Search

Controlled nuclear fusion as a new energy source was investigated. It will be possible in the 1980's to obtain thermal nuclear ignition, and in the early 2000's nuclear fusion may be used to supplement the energy shortage. It is predicted that in the 2000's nuclear fusion will occupy an important position as a global source of energy.

Z. Shiyao; C. Zesheng; X. Xiaolung; H. Qiang

1982-01-01

378

Cryogenic engineering and fusion power  

Microsoft Academic Search

In order to reduce the consumption of power for the magnets of a fusion power plant to acceptable proportions, it is necessary that fusion reactors must use either cryogenically cooled or superconducting coils. The cryogenic aspects of reactor design are discussed. It is found that the most difficult cryogenic engineering problems of fusion reactors are mainly those caused by the

C. E. Taylor

1974-01-01

379

Fusion power plant availability study  

Microsoft Academic Search

The consideration of fusion as an alternative energy source will need to demonstrate that Fusion Power Plant (FPP) design, operating and maintenance characteristics meet the electrical market requirements forecast for the second half of this century. Until now, fusion has been developed in the framework of research and development programmes following natural technological trends. To bring a greater sense of

D. Ladra; G. P. Sanguinetti; E. Stube

2001-01-01

380

U. S. Fusion Energy Future  

Microsoft Academic Search

Fusion implementation scenarios for the US have been developed. The dependence of these scenarios on both the fusion development and implementation paths has been assessed. A range of implementation paths has been studied. The deployment of CANDU fission reactors in Canada and the deployment of fission reactors in France have been assessed as possible models for US fusion deployment. The

John A. Schmidt; Dan Jassby; Scott Larson; Maria Pueyo; Paul H. Rutherford

2000-01-01

381

Riccardo Betti Fusion Science Center  

E-print Network

iP n T nT nT= + 3.5MeV Fusion reactivity ion particle density Energy confinement time Plasma that the alpha-particle heating of the hot spot exceeds all the energy losses FSC #12;Fusion reactivityRiccardo Betti Fusion Science Center Laboratory for Laser Energetics, University of Rochester

382

Industrial motor repair in the United States  

SciTech Connect

This report characterizes the motor repair industry in the United States; summarizes current motor repair and testing practice; and identifies barriers to energy motor repair practice and recommends strategies for overcoming those barriers.

Schueler, V.; Leistner, P.; Douglass, J.

1994-09-01

383

30 CFR 18.34 - Motors.  

Code of Federal Regulations, 2010 CFR

...may be shimmed as necessary. (c) Alternating-current motors. Stator laminations that form a...rings and laminations. (d) Small motors (alternating- and direct-current). Motors having internal free volume not...

2010-07-01

384

COMMERICAL MOTOR VEHICLE OPERATOR EMPLOYMENT APPLICATION SUPPLEMENT  

E-print Network

COMMERICAL MOTOR VEHICLE OPERATOR EMPLOYMENT APPLICATION SUPPLEMENT _________________________________________________________ Applicants for positions involving the operation of a commercial motor vehicle must comply with Title 49 CFR: _______________ Please list the following information for each unexpired commercial motor vehicle operator license

Pilyugin, Sergei S.

385

Developing a Motor Management Policy at BASF  

E-print Network

In early 1998 Thomas R. Theising, BASF Corporate Engineering initiated the formation of a motor management team. The goal of the team was to develop a Motor Management Guideline to better manage the purchase and repair of motors used throughout...

Zickefoose, B.; Theising, T. R.

386

Power control for ac motor  

NASA Technical Reports Server (NTRS)

A motor controller employing a triac through which power is supplied to a motor is described. The open circuit voltage appearing across the triac controls the operation of a timing circuit. This timing circuit triggers on the triac at a time following turn off which varies inversely as a function of the amplitude of the open circuit voltage of the triac.

Dabney, R. W. (inventor)

1984-01-01

387

Motor Coordination and Executive Functions  

ERIC Educational Resources Information Center

Since Piaget, the view that motor and cognitive development are interrelated has gained wide acceptance. However, empirical research on this issue is still rare. Few studies show a correlation of performance in cognitive and motor tasks in typically developing children. More specifically, Diamond A. (2000) hypothesizes an involvement of executive…

Michel, Eva

2012-01-01

388

Determinants of molecular motor directionality  

Microsoft Academic Search

Work over the past two years has led to a breakthrough in our understanding of the molecular basis of the directionality of the kinesin motor proteins. This breakthrough has come first from the reversal of directionality of the kinesin-related motor Ncd, followed closely by the reversal of kinesin’s directionality and the finding that the Ncd ‘neck’ can convert Ncd or

Sharyn A. Endow

1999-01-01

389

Individualized Motor-Perceptual Study.  

ERIC Educational Resources Information Center

This guide is being used in the Individualized Motor-Perceptual Study to determine whether working directly with kindergarten children to improve performance on motor-perceptual tasks will affect reading ability at the end of grades one, two, and three. The 5-year project involves six schools. In this guide, there are tips for teaching, suggested…

Portland Public Schools, OR.

390

Aluminum frame motors: Environmental testing  

Microsoft Academic Search

The Civil Engineering Laboratory has conducted environmental tests to determine if aluminum frame motors instead of cast iron frame motors would be suitable for use in salt fog environments similar to those experienced at Naval Shore Facilities. The aluminum frame in the salt fog environment had minimal corrosion, indicating it is superior to cast iron for these applications. During the

D. E. Weems

1976-01-01

391

Conical Bearingless Motor/Generators  

NASA Technical Reports Server (NTRS)

Motor/generators based on conical magnetic bearings have been invented as an improved alternative to prior such machines based, variously, on radial and/or axial magnetic bearings. Both the present and prior machines are members of the class of so-called bearingless or self bearing (in the sense of not containing mechanical bearings) rotary machines. Each motor/generator provides both a torque and force allowing it to either function as a motor and magnetic bearing or a generator and magnetic bearing concurrently. Because they are not subject to mechanical bearing wear, these machines have potentially long operational lives and can function without lubrication and over wide ranges of speed and temperature that include conditions under which lubricants would become depleted, degraded, or ineffective and mechanical bearings would fail. The figure shows three typical configurations of conical bearingless motor/generators. The main elements of each motor/generator are concentric rotor and stator portions having conically tapered surfaces facing each other across a gap. Because a conical motor/generator imposes both radial and axial magnetic forces, it acts, in effect, as a combination of an axial and a radial magnetic bearing. Therefore, only two conical motor/generators - one at each end of a rotor - are needed to effect complete magnetic leviation of the rotor, whereas previously, it was necessary to use a combination of an axial and a radial magnetic bearing at each end of the rotor to achieve complete magnetic levitation and a separate motor to provide torque.

Kascak, P.; Jansen, R.; Dever, T.

2008-01-01

392

Power control for ac motor  

NASA Astrophysics Data System (ADS)

A motor controller employing a triac through which power is supplied to a motor is described. The open circuit voltage appearing across the triac controls the operation of a timing circuit. This timing circuit triggers on the triac at a time following turn off which varies inversely as a function of the amplitude of the open circuit voltage of the triac.

Dabney, R. W.

1984-12-01

393

Cognitive control in motor expertise  

Microsoft Academic Search

This article examines cognitive control in motor expertise. Extensive research in sport domains has shown that adult experts exhibit superior response selection performance (tactical decision making) as well as superior motor skill execution. Two mechanisms that contribute to expert performance are problem representations and gaze behavior strategies. These mechanisms are reviewed in terms of their development and role in expert

Sue L. McPherson; Joan N. Vickers

2004-01-01

394

Motor program switching in Pleurobranchaea  

Microsoft Academic Search

1.Three distinct motor programs, namely ingestion, egestion and a third slower rhythm, have been identified in the buccal musculature of intact specimens of the gastropod molluscPleurobranchaea (Croll and Davis 1981). In the present study we have elicited each of these motor programs and characterized them in greater detail utilizing the technically more amenable reduced preparation, consisting of mouth, buccal mass,

Roger P. Croll; W. J. Davis

1982-01-01

395

Verification of Motor Repair Quality  

E-print Network

Motor testing at Advanced Energy has shown that a motor that has not suffered irreparable damage as a result of failure can be repaired to perform as well as before the failure. But the only way to achieve the performance level of an energy...

Butler, K.

396

The Mechanochemistry of Molecular Motors  

Microsoft Academic Search

A theory of molecular motors is presented that explains how the energy released in single chemical reactions can generate mechanical motion and force. In the simplest case the fluctuating movements of a motor enzyme are well described by a diffusion process on a two-dimensional potential energy surface, where one dimension is a chemical reaction coordinate and the other is the

David Keller; Carlos Bustamante

2000-01-01

397

Forgetting motor programmes: Retrieval dynamics in procedural memory.  

PubMed

When motor sequences are stored in memory in a categorised manner, selective retrieval of some sequences can induce forgetting of the non-retrieved sequences. We show that such retrieval-induced forgetting (RIF) occurs not only in cued recall but also in a test assessing memory indirectly by providing novel test cues without involving recall of items. Participants learned several sequential finger movements (SFMs), each consisting of the movement of two fingers of either the left or the right hand. Subsequently, they performed retrieval practice on half of the sequences of one hand. A final task then required participants to enter letter dyads. A subset of these dyads corresponded to the previously learned sequences. RIF was present in the response times during the entering of the dyads. The finding of RIF in the slowed-down execution of motor programmes overlapping with initially trained motor sequences suggests that inhibition resolved interference between procedural representations of the acquired motor sequences of one hand during retrieval practice. PMID:24417204

Tempel, Tobias; Frings, Christian

2014-11-01

398

Speckled microtubules improve tracking in motor-protein gliding assays  

NASA Astrophysics Data System (ADS)

Gliding assays of motor proteins such as kinesin, dynein and myosin are commonly carried out with fluorescently labeled microtubules or filamentous actin. In this paper, we show that speckled microtubules (MTs), prepared by copolymerizing 98% unlabeled tubulin with 2% rhodamine-labeled tubulin, can be localized to ±7.4 nm (24 measurements) in images acquired every 125 ms. If the speckled MTs move at about 800 nm s-1, ten images are sufficient to determine their velocity to a precision of ±6.8 nm s-1 (6 microtubules, 24 measurements). This velocity precision is four-fold better than manual methods for measuring the gliding velocity of uniformly labeled MTs by end-point localization. The improved velocity precision will permit the determination of velocity-force curves when one, two and three kinesin motors pull a single load in vitro.

Chisena, Ernest N.; Wall, R. Andrew; Macosko, Jed C.; Holzwarth, George

2007-03-01

399

Fusion of Angiography and Intravascular Ultrasound In-Vivo: Establishing the Absolute 3-D Frame Orientation  

E-print Network

) facilitates geometrically correct reconstruc- tion of coronary vessels. The locations of IVUS frames along orientation. The fusion method was applied to data acquired in patients undergoing routine coronary For the assessment of atherosclerotic disease, two major imaging modalities are commonly utilized. Quantitative Coro

Wahle, Andreas

400

Wavelets and image fusion  

Microsoft Academic Search

This paper describes an approach to image fusion using the wavelet transform. When images are merged in wavelet space, we can process different frequency ranges differently. For example, high frequency information from one image can be combined with lower frequency information from another, for performing edge enhancement. We have built a prototype system that allows experimentation with various wavelet array

Laure J. Chipman; Timothy M Orr; Lewis N. Graham

1995-01-01

401

Hierarchical image fusion  

Microsoft Academic Search

A hierarchical image fusion scheme is presented that preserves those details from the input images that are most relevant to visual perception. Results show that fused images present a more detailed representation of the scene and provide information that cannot be obtained by viewing the input images separately. Detection, recognition, and search tasks may therefore benefit from this fused image

Alexander Toet

1989-01-01

402

Fusion Energy Workshop  

NASA Astrophysics Data System (ADS)

Technology and public policy related to magnetic fusion research and development in the United States are discussed. Physics issues which must be addressed are identified and examined. International cooperation and the types of reactors being developed in other countries are considered as well as program characteristics, risk levels, and management approaches in the United States.

403

Mars manned fusion spaceship  

NASA Technical Reports Server (NTRS)

Fusion Propulsion has an enormous potential for space exploration in the near future. In the twenty-first century, a usable and efficient fusion rocket will be developed and in use. Because of the great distance between other planets and Earth, efficient use of time, fuel, and payload is essential. A nuclear spaceship would provide greater fuel efficiency, less travel time, and a larger payload. Extended missions would give more time for research, experiments, and data acquisition. With the extended mission time, a need for an artificial environment exists. The topics of magnetic fusion propulsion, living modules, artificial gravity, mass distribution, space connection, and orbital transfer to Mars are discussed. The propulsion system is a magnetic fusion reactor based on a tandem mirror design. This allows a faster, shorter trip time and a large thrust to weight ratio. The fuel proposed is a mixture of deuterium and helium-3. Helium-3 can be obtained from lunar mining. There will be minimal external radiation from the reactor resulting in a safe, efficient propulsion system.

Hedrick, James; Buchholtz, Brent; Ward, Paul; Freuh, Jim; Jensen, Eric

1991-01-01

404

Compact fusion reactors  

SciTech Connect

Compact, high-power-density approaches to fusion power are proposed to improve economic viability through the use of less-advanced technology in systems of considerably reduced scale. The rationale for and the means by which these systems can be achieved are discussed, as are unique technological problems.

Krakowski, R.A.; Hafenson, R.L.

1983-09-01

405

Bubble fusion: Preliminary estimates  

SciTech Connect

The collapse of a gas-filled bubble in disequilibrium (i.e., internal pressure {much_lt} external pressure) can occur with a significant focusing of energy onto the entrapped gas in the form of pressure-volume work and/or acoustical shocks; the resulting heating can be sufficient to cause ionization and the emission of atomic radiations. The suggestion that extreme conditions necessary for thermonuclear fusion to occur may be possible has been examined parametrically in terms of the ratio of initial bubble pressure relative to that required for equilibrium. In this sense, the disequilibrium bubble is viewed as a three-dimensional ``sling shot`` that is ``loaded`` to an extent allowed by the maximum level of disequilibrium that can stably be achieved. Values of this disequilibrium ratio in the range 10{sup {minus}5}--10{sup {minus}6} are predicted by an idealized bubble-dynamics model as necessary to achieve conditions where nuclear fusion of deuterium-tritium might be observed. Harmonic and aharmonic pressurizations/decompressions are examined as means to achieve the required levels of disequilibrium required to create fusion conditions. A number of phenomena not included in the analysis reported herein could enhance or reduce the small levels of nuclear fusions predicted.

Krakowski, R.A.

1995-02-01

406

Compact fusion reactors  

SciTech Connect

Compact, high-power-density approaches to fusion power are proposed to improve economic viability through the use of less-advanced technology in systems of considerably reduced scale. The rationale for and the means by which these systems can be achieved are discussed, as are unique technological problems.

Krakowski, R.A.; Hagenson, R.L.

1983-01-01

407

Motor-operator gearbox efficiency  

SciTech Connect

Researchers at the Idaho National Engineering Laboratory recently conducted tests investigating the operating efficiency of the power train (gearbox) in motor-operators typically used in nuclear power plants to power motor-operated valves. Actual efficiency ratios were determined from in-line measurements of electric motor torque (input to the operator gearbox) and valve stem torque (output from the gearbox) while the operators were subjected to gradually increasing loads until the electric motor stalled. The testing included parametric studies under reduced voltage and elevated temperature conditions. As part of the analysis of the results, we compared efficiency values determined from testing to the values published by the operator manufacturer and typically used by the industry in calculations for estimating motor-operator capabilities. The operators we tested under load ran at efficiencies lower than the running efficiency (typically 50%) published by the operator manufacturer.

DeWall, K.G.; Watkins, J.C.; Bramwell, D.

1996-06-01

408

Control of Fusion and Solubility in Fusion Systems David A. Craven  

E-print Network

Control of Fusion and Solubility in Fusion Systems David A. Craven March 2009 Abstract In this article, we consider control of fusion, quotients, and p-soluble fusion systems. For control of fusion, we for fusion systems. We move on to p-soluble fusion systems, and prove that they are constrained, allowing us

Craven, David A.

409

Reprogramming of plants during systemic acquired resistance  

PubMed Central

Genome-wide microarray analyses revealed that during biological activation of systemic acquired resistance (SAR) in Arabidopsis, the transcript levels of several hundred plant genes were consistently up- (SAR+ genes) or down-regulated (SAR? genes) in systemic, non-inoculated leaf tissue. This transcriptional reprogramming fully depended on the SAR regulator FLAVIN-DEPENDENT MONOOXYGENASE1 (FMO1). Functional gene categorization showed that genes associated with salicylic acid (SA)-associated defenses, signal transduction, transport, and the secretory machinery are overrepresented in the group of SAR+ genes, and that the group of SAR? genes is enriched in genes activated via the jasmonate (JA)/ethylene (ET)-defense pathway, as well as in genes associated with cell wall remodeling and biosynthesis of constitutively produced secondary metabolites. This suggests that SAR-induced plants reallocate part of their physiological activity from vegetative growth towards SA-related defense activation. Alignment of the SAR expression data with other microarray information allowed us to define three clusters of SAR+ genes. Cluster I consists of genes tightly regulated by SA. Cluster II genes can be expressed independently of SA, and this group is moderately enriched in H2O2- and abscisic acid (ABA)-responsive genes. The expression of the cluster III SAR+ genes is partly SA-dependent. We propose that SA-independent signaling events in early stages of SAR activation enable the biosynthesis of SA and thus initiate SA-dependent SAR signaling. Both SA-independent and SA-dependent events tightly co-operate to realize SAR. SAR+ genes function in the establishment of diverse resistance layers, in the direct execution of resistance against different (hemi-)biotrophic pathogen types, in suppression of the JA- and ABA-signaling pathways, in redox homeostasis, and in the containment of defense response activation. Our data further indicated that SAR-associated defense priming can be realized by partial pre-activation of particular defense pathways. PMID:23874348

Gruner, Katrin; Griebel, Thomas; Navarova, Hana; Attaran, Elham; Zeier, Jurgen

2013-01-01

410

Impact of lactobacilli on orally acquired listeriosis  

PubMed Central

Listeria monocytogenes is a foodborne pathogen that crosses the intestinal barrier and disseminates within the host. Here, we report a unique comprehensive analysis of the impact of two Lactobacillus species, Lactobacillus paracasei CNCM I-3689 and Lactobacillus casei BL23, on L. monocytogenes and orally acquired listeriosis in a gnotobiotic humanized mouse model. We first assessed the effect of treatment with each Lactobacillus on L. monocytogenes counts in host tissues and showed that each decreases L. monocytogenes systemic dissemination in orally inoculated mice. A whole genome intestinal transcriptomic analysis revealed that each Lactobacillus changes expression of a specific subset of genes during infection, with IFN-stimulated genes (ISGs) being the most affected by both lactobacilli. We also examined microRNA (miR) expression and showed that three miRs (miR-192, miR-200b, and miR-215) are repressed during L. monocytogenes infection. Treatment with each Lactobacillus increased miR-192 expression, whereas only L. casei association increased miR-200b and miR-215 expression. Finally, we showed that treatment with each Lactobacillus significantly reshaped the L. monocytogenes transcriptome and up-regulated transcription of L. monocytogenes genes encoding enzymes allowing utilization of intestinal carbon and nitrogen sources in particular genes involved in propanediol and ethanolamine catabolism and cobalamin biosynthesis. Altogether, these data reveal that the modulation of L. monocytogenes infection by treatment with lactobacilli correlates with a decrease in host gene expression, in particular ISGs, miR regulation, and a dramatic reshaping of L. monocytogenes transcriptome. PMID:23012479

Archambaud, Cristel; Nahori, Marie-Anne; Soubigou, Guillaume; Becavin, Christophe; Laval, Laure; Lechat, Pierre; Smokvina, Tamara; Langella, Philippe; Lecuit, Marc; Cossart, Pascale

2012-01-01

411

System and method for motor fault detection using stator current noise cancellation  

DOEpatents

A system and method for detecting incipient mechanical motor faults by way of current noise cancellation is disclosed. The system includes a controller configured to detect indicia of incipient mechanical motor faults. The controller further includes a processor programmed to receive a baseline set of current data from an operating motor and define a noise component in the baseline set of current data. The processor is also programmed to acquire at least on additional set of real-time operating current data from the motor during operation, redefine the noise component present in each additional set of real-time operating current data, and remove the noise component from the operating current data in real-time to isolate any fault components present in the operating current data. The processor is then programmed to generate a fault index for the operating current data based on any isolated fault components.

Zhou, Wei (Los Angeles, CA); Lu, Bin (Kenosha, WI); Nowak, Michael P. (Menomonee Falls, WI); Dimino, Steven A. (Wauwatosa, WI)

2010-12-07

412

Multifocal motor neuropathy with conduction block with sensory fibre involvement in a diabetic patient. Case report.  

PubMed

Multifocal motor neuropathy with conduction block (MMNcb) is a relatively rare disease characterized clinically by asymmetric limb weakness with spared sensation and electrophysiologically by persistent focal motor conduction block. We present the case of a 40-year-old male patient with six-year history of progressive, asymmetric weakness of upper and lower extremities without sensory symptoms. Electroneurography revealed definite or probable motor conduction block in several nerves. However, features of axonal lesion of sensory fibres were also found. Laboratory studies were unremarkable apart from an abnormal glucose tolerance test, and type 2 diabetes was diagnosed. In the presented case the differential diagnosis should take into consideration MMNcb with coexisting diabetic sensory polyneuropathy and multifocal acquired demyelinating sensory and motor neuropathy (MADSAM). PMID:18651334

Fila, Micha?; Szadkowska, Iwona; Hasiec, Tomasz; Bogucki, Andrzej

2008-01-01

413

Piezoelectric wave motor  

DOEpatents

A piezoelectric motor having a stator in which piezoelectric elements are contained in slots formed in the stator transverse to the desired wave motion. When an electric field is imposed on the elements, deformation of the elements imposes a force perpendicular to the sides of the slot, deforming the stator. Appropriate frequency and phase-shifting of the electric field will produce a wave in the stator and motion in a rotor. In a preferred aspect, the piezoelectric elements are configured so that deformation of the elements in the direction of an imposed electric field, generally referred to as the d.sub.33 direction, is utilized to produce wave motion in the stator. In a further aspect, the elements are compressed into the slots so as to minimize tensile stresses on the elements in use.

Yerganian, Simon Scott (Lee's Summit, MO)

2003-02-11

414

Piezoelectric wave motor  

DOEpatents

A piezoelectric motor having a stator in which piezoelectric elements are contained in slots formed in the stator transverse to the desired wave motion. When an electric field is imposed on the elements, deformation of the elements imposes a force perpendicular to the sides of the slot, deforming the stator. Appropriate frequency and phase shifting of the electric field will produce a wave in the stator and motion in a rotor. In a preferred aspect, the piezoelectric elements are configured so that deformation of the elements in direction of an imposed electric field, generally referred to as the d.sub.33 direction, is utilized to produce wave motion in the stator. In a further aspect, the elements are compressed into the slots so as to minimize tensile stresses on the elements in use.

Yerganian, Simon Scott (Lee's Summit, MO)

2001-07-17

415

Stau-catalyzed Nuclear Fusion  

E-print Network

We point out that the stau may play a role of a catalyst for nuclear fusions if the stau is a long-lived particle as in the scenario of gravitino dark matter. In this letter, we consider d d fusion under the influence of stau where the fusion is enhanced because of a short distance between the two deuterons. We find that one chain of the d d fusion may release an energy of O(10) GeV per stau. We discuss problems of making the stau-catalyzed nuclear fusion of practical use with the present technology of producing stau.

K. Hamaguchi; T. Hatsuda; T. T. Yanagida

2006-07-24

416

Enhanced image capture through fusion  

NASA Technical Reports Server (NTRS)

Image fusion may be used to combine images from different sensors, such as IR and visible cameras, to obtain a single composite with extended information content. Fusion may also be used to combine multiple images from a given sensor to form a composite image in which information of interest is enhanced. We present a general method for performing image fusion and show that this method is effective for diverse fusion applications. We suggest that fusion may provide a powerful tool for enhanced image capture with broad utility in image processing and computer vision.

Burt, Peter J.; Hanna, Keith; Kolczynski, Raymond J.

1993-01-01

417

Fusion Ignition Research Experiment (FIRE)  

NSDL National Science Digital Library

A division of the Princeton Plasma Research Laboratory (described in the July 1, 1994 Scout Report for Science & Engineering), the Fusion Ignition Research Experiment (FIRE) aims "to attain, explore, understand and optimize alpha-dominated plasmas to provide knowledge for the design of attractive Magnetic Fusion systems." Up-to-date, downloadable reports (.pdf and MS Word formats) contain background information and reviews of US fusion policy, Snowmass Fusion Summer Study working group summaries, FIRE reports on physics and engineering design considerations, and an engineering appendix. Clearly displayed, this site harbors a wealth of dense information for researchers interested in the design of magnetic fusion systems.

418

Directions for improved fusion reactors  

SciTech Connect

Conceptual fusion reactor studies over the past 10 to 15 years have projected systems that may be too large, complex, and costly to be of commercial interest. One main direction for improved fusion reactors points towards smaller, higher-power-density approaches. First-order economic issues (i.e., unit direct cost and cost of electricity) are used to support the need for more compact fusion reactors. A generic fusion physics/engineering/costing model is used to provide a quantiative basis for these arguments for specific fusion concepts.

Krakowski, R.A.; Miller, R.L.; Delene, J.G.

1986-01-01

419

Fluid Gravity Engineering Rocket motor flow analysis  

E-print Network

Fluid Gravity Engineering Capability · Rocket motor flow analysis -Internal (performance) -External response · Rocket motor plume IR assessments -Plume extent, composition and temperature -Radiation

Anand, Mahesh

420

ASRM subscale plume deflector testing. [advanced solid rocket motor  

NASA Technical Reports Server (NTRS)

This paper reports the results of the scale model (1/22) testing of candidate refractory materials to be used as surface coatings for a solid rocket motor plume deflector structure. Five ROM tests were conducted to acquire data to support the selection, thickness determination, and placement of the materials. All data acquisition was achieved through nonintrusive methods. The tests demonstrated that little or no reductions in performance of the full-scale deflector would be experienced if the most economical materials were selected for construction.

Douglas, Freddie, III; Dawson, Michael C.; Orlin, Peter A.

1992-01-01

421

Research on fusion neutron sources  

NASA Astrophysics Data System (ADS)

The use of fusion devices as powerful neutron sources has been discussed for decades. Whereas the successful route to a commercial fusion power reactor demands steady state stable operation combined with the high efficiency required to make electricity production economic, the alternative approach to advancing the use of fusion is free of many of complications connected with the requirements for economic power generation and uses the already achieved knowledge of Fusion physics and developed Fusion technologies. "Fusion for Neutrons" (F4N), has now been re-visited, inspired by recent progress achieved on comparably compact fusion devices, based on the Spherical Tokamak (ST) concept. Freed from the requirement to produce much more electricity than used to drive it, a fusion neutron source could be efficiently used for many commercial applications, and also to support the goal of producing energy by nuclear power. The possibility to use a small or medium size ST as a powerful or intense steady-state fusion neutron source (FNS) is discussed in this paper in comparison with the use of traditional high aspect ratio tokamaks. An overview of various conceptual designs of compact fusion neutron sources based on the ST concept is given and they are compared with a recently proposed Super Compact Fusion Neutron Source (SCFNS), with major radius as low as 0.5 metres but still able to produce several MW of neutrons in a steady-state regime.

Gryaznevich, M. P.

2012-06-01

422

Research on fusion neutron sources  

SciTech Connect

The use of fusion devices as powerful neutron sources has been discussed for decades. Whereas the successful route to a commercial fusion power reactor demands steady state stable operation combined with the high efficiency required to make electricity production economic, the alternative approach to advancing the use of fusion is free of many of complications connected with the requirements for economic power generation and uses the already achieved knowledge of Fusion physics and developed Fusion technologies. 'Fusion for Neutrons' (F4N), has now been re-visited, inspired by recent progress achieved on comparably compact fusion devices, based on the Spherical Tokamak (ST) concept. Freed from the requirement to produce much more electricity than used to drive it, a fusion neutron source could be efficiently used for many commercial applications, and also to support the goal of producing energy by nuclear power. The possibility to use a small or medium size ST as a powerful or intense steady-state fusion neutron source (FNS) is discussed in this paper in comparison with the use of traditional high aspect ratio tokamaks. An overview of various conceptual designs of compact fusion neutron sources based on the ST concept is given and they are compared with a recently proposed Super Compact Fusion Neutron Source (SCFNS), with major radius as low as 0.5 metres but still able to produce several MW of neutrons in a steady-state regime.

Gryaznevich, M. P. [Tokamak Solutions UK, Culham Science Centre, Abingdon, OXON, OX133DB (United Kingdom)

2012-06-19

423

The path to fusion power.  

PubMed

Fusion is potentially an environmentally responsible and intrinsically safe source of essentially limitless power. It should be possible to build viable fusion power stations, and it looks as if the cost of fusion power will be reasonable. But time is needed to further develop the technology and to test in power station conditions the materials that would be used in their construction. Assuming no major adverse surprises, an orderly fusion development programme could lead to a prototype fusion power station putting electricity into the grid within 30 years, with commercial fusion power following some 10 or more years later. In the second half of the century, fusion could therefore be an important part of the portfolio of measures that are needed to cope with rising demand for energy in an environmentally responsible manner. In this paper, we describe the basics of fusion, its potential attractions, the status of fusion R&D, the remaining challenges and how they will be tackled at the International Tokamak Experimental Reactor and the proposed International Fusion Materials Irradiation Facility, and the timetable for the subsequent commercialization of fusion power. PMID:17272246

Llewellyn Smith, Chris; Ward, David

2007-04-15

424

The Need for Fusion Propulsion  

NASA Technical Reports Server (NTRS)

Fusion propulsion is inevitable if the human race remains dedicated to exploration of the solar system. There are fundamental reasons why fusion surpasses more traditional approaches to routine crewed missions to Mars, crewed missions to the outer planets, and deep space high speed robotic missions, assuming that reduced trip times, increased payloads, and higher available power are desired. A recent series of informal discussions were held among members from government, academia, and industry concerning fusion propulsion. We compiled a sufficient set of arguments for utilizing fusion in space. If the U.S. is to lead the effort and produce a working system in a reasonable amount of time, NASA must take the initiative, relying on, but not waiting for, DOE guidance. In this talk those arguments for fusion propulsion are presented, along with fusion enabled mission examples, fusion technology trade space, and a proposed outline for future efforts.

Cassibry, Jason

2005-01-01

425

Community-Acquired Methicillin-Resistant Staphylococcus aureus, Finland  

Microsoft Academic Search

Methicillin-resistant Staphylococcus aureus (MRSA) is no longer only hospital acquired. MRSA is defined as community acquired if the MRSA-positive specimen was obtained outside hospital settings or within 2 days of hospital admission, and if it was from a person who had not been hospitalized within 2 years before the date of MRSA isolation. To estimate the proportion of community-acquired MRSA,

Saara Salmenlinna; Outi Lyytikäinen; Jaana Vuopio-Varkila

2002-01-01

426

Hospital acquired rotavirus infections: burden in Canadian paediatric hospitals  

Microsoft Academic Search

Rotavirus infections are one of the most common hospital acquired infections in pediatric hospitals. Laboratory confirmed hospital acquired rotavirus infections from 12 pediatric hospitals in Canada were documented for a 3 year period, 2005-7. Overall, hospital acquired infections represented one quarter of all rotavirus hospitalizations for an annual rate of 0.45 per 1000 hospital days with a peak of 0.68

Nicole Le Saux; Julie Bettinger; Scott Halperin; Wendy Vaudry; David Scheifele

2011-01-01

427

Hospital-acquired infections: are prevention strategies matching incidence rates?  

Microsoft Academic Search

The threat of hospital-acquired infections, although known, continues to rise. Are hospitals setting guidelines in order to prevent hospital infections? If so, arethe setguidelines effective? A study conducted across three hospitals showed asignificant drop in the rates of surgical site infections (SSI) and hospital-acquired urinary tract infection (UTI) by increasing the awareness of hospital-acquired infections among healthcare workers. An education

Joyce B. Suchitra; Nanjaiah Lakshmidevi

2009-01-01

428

How do galaxies acquire their mass?  

NASA Astrophysics Data System (ADS)

We study the growth of galaxy masses, via gas accretion and galaxy mergers. We introduce a toy model that describes (in a single equation) how much baryonic mass is accreted and retained into galaxies as a function of halo mass and redshift. In our model, the evolution of the baryons differs from that of the dark matter because 1) gravitational shock heating and AGN jets suppress gas accretion mainly above a critical halo mass of Mshock ~ 1012 M?; 2) the intergalactic medium after reionisation is too hot for accretion onto haloes with circular velocities vcirc ? 40 km s-1; 3) stellar feedback drives gas out of haloes, mainly those with vcirc ? 120 km s-1. We run our model on the merger trees of the haloes and sub-haloes of a high-resolution dark matter cosmological simulation. The galaxy mass is taken as the maximum between the mass given by the toy model and the sum of the masses of its progenitors (reduced by tidal stripping). Designed to reproduce the present-day stellar mass function of galaxies, our model matches fairly well the evolution of the cosmic stellar density. It leads to the same z = 0 relation between central galaxy stellar and halo mass as the one found by abundance matching and also as that previously measured at high mass on SDSS centrals. Our model also predicts a bimodal distribution (centrals and satellites) of stellar masses for given halo mass, in very good agreement with SDSS observations. The relative importance of mergers depends strongly on stellar mass (more than on halo mass). Massive galaxies with mstars > mcrit ~ ?b/?mMshock ~ 1011 M? acquire most of their final mass through mergers (mostly major and gas-poor), as expected from our model's shutdown of gas accretion at high halo masses. However, although our mass resolution should see the effects of mergers down to mstars ? 1010.6 h-1 M?, we find that mergers are rare for mstars ? 1011 h-1 M?. This is a consequence of the curvature of the stellar vs. halo mass relation set by the physical processes of our toy model and found with abundance matching. So gas accretion must be the dominant growth mechanism for intermediate and low mass galaxies, including dwarf ellipticals in clusters. The contribution of galaxy mergers terminating in haloes with mass Mhalo < Mshock (thus presumably gas-rich) to the mass buildup of galaxies is small at all masses, but accounts for the bulk of the growth of ellipticals of intermediate mass (~1010.5 h-1 M?), which we predict must be the typical mass of ULIRGs.

Cattaneo, A.; Mamon, G. A.; Warnick, K.; Knebe, A.

2011-09-01

429

Development of oral motor behavior related to the skill assisted spoon feeding.  

PubMed

Milestones in the typical development of eating skills are considered to be nippling (breast or bottle), eating from a spoon, drinking from a cup, biting and chewing. The purpose of this research was to study the development and consolidation of oral motor behavior related to the skill assisted spoon feeding in young infants. The present study longitudinally investigated the development of this skill in 39 healthy children from the start of spoon feeding until the skill was acquired. The Observation List Spoon Feeding with 7 observation items for oral motor behavior and 6 items for abnormal behavior was used. Results showed that infants between 4 and 8 months of age needed 5.7 weeks (SD 2.1), with a range of 8 weeks (from 2 to 10 weeks) to acquire this skill. No significant correlation (p=.109) between age at start spoon feeding and weeks needed to develop the skill was found. During this period oral motor behavior consolidated and abnormal behavior diminished. With this study it is shown that the period in weeks needed to acquire the oral motor behavior for the skill assisted spoon feeding is important in case of feeding problems. PMID:24571957

van den Engel-Hoek, Lenie; van Hulst, Karen C M; van Gerven, Marjo H J C; van Haaften, Leenke; de Groot, Sandra A F

2014-05-01

430

Submersible canned motor mixer pump  

DOEpatents

A mixer pump used in a waste tank for mobilizing high-level radioactive liquid waste having a column assembly containing power cables, a motor housing with electric motor means which includes a stator can of a stator assembly and a rotor can of a rotor assembly, and an impeller assembly with an impeller connected to a shaft of the rotor assembly. The column assembly locates the motor housing with the electric motor means adjacent to the impeller which creates an hydraulic head, and which forces the liquid waste into the motor housing to cool the electric motor means and to lubricate radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the impeller and electric motor means act to grind down large particles in the liquid waste flow. These larger particles are received in slots in the static bearing members of the radial bearing assemblies. Only solid waste particles smaller than the clearances in the system can pass therethrough, thereby resisting damage to and the interruption of the operation of the mixer pump.

Guardiani, Richard F. (Ohio Township, PA); Pollick, Richard D. (Sarver, PA)

1997-01-01

431

Submersible canned motor mixer pump  

DOEpatents

A mixer pump is described used in a waste tank for mobilizing high-level radioactive liquid waste having a column assembly containing power cables, a motor housing with electric motor means which includes a stator can of a stator assembly and a rotor can of a rotor assembly, and an impeller assembly with an impeller connected to a shaft of the rotor assembly. The column assembly locates the motor housing with the electric motor means adjacent to the impeller which creates an hydraulic head, and which forces the liquid waste into the motor housing to cool the electric motor means and to lubricate radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the impeller and electric motor means act to grind down large particles in the liquid waste flow. These larger particles are received in slots in the static bearing members of the radial bearing assemblies. Only solid waste particles smaller than the clearances in the system can pass there through, thereby resisting damage to and the interruption of the operation of the mixer pump. 10 figs.

Guardiani, R.F.; Pollick, R.D.

1997-10-07

432

Submersible canned motor transfer pump  

DOEpatents

A transfer pump used in a waste tank for transferring high-level radioactive liquid waste from a waste tank and having a column assembly, a canned electric motor means, and an impeller assembly with an upper impeller and a lower impeller connected to a shaft of a rotor assembly. The column assembly locates a motor housing with the electric motor means adjacent to the impeller assembly which creates an hydraulic head, and which forces the liquid waste, into the motor housing to cool the electric motor means and to cool and/or lubricate the radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the upper impeller and electric motor means grind large particles in the liquid waste flow. Slots in the static bearing member of the radial bearing assemblies further grind down the solid waste particles so that only particles smaller than the clearances in the system can pass therethrough, thereby resisting damage to and the interruption of the operation of the transfer pump. The column assembly is modular so that sections can be easily assembled, disassembled and/or removed. A second embodiment employs a stator jacket which provides an alternate means for cooling the electric motor means and lubricating and/or cooling the bearing assemblies, and a third embodiment employs a variable level suction device which allows liquid waste to be drawn into the transfer pump from varying and discrete levels in the waste tank.

Guardiani, Richard F. (Ohio Township, Allegheny County, PA); Pollick, Richard D. (Sarver, PA); Nyilas, Charles P. (Monroeville, PA); Denmeade, Timothy J. (Lower Burrell, PA)

1997-01-01

433

Filament depolymerisation by motor proteins  

NASA Astrophysics Data System (ADS)

Many active processes in cells are driven by highly specialized motor proteins, which interact with filaments of the cytoskeleton. Members of the Kin-13 kinesin subfamily are able to interact specifically with filament ends and induce depolymerisation of the filaments ends. Recent in vitro assays and single molecule studies have shown, that MCAK accumulates at both ends of stabilized microtubules and induces depolymerisation while at the same time MCAK molecules do not generate directed motion along the microtubules [1]. We analyse both, a stochastic model and a generic mean-field description of this process. We discuss conditions under which motors dynamically accumulate at the filament end. Such a dynamic accumulation occurs for processive cutting, which implies, that the motor can remain attached to the shrinking edge after subunit removal. For processive cutting, the depolymerisation speed as a function of the bulk motor concentration can exhibit a maximum for intermediate motor concentration. For high motor processivity a dynamic instability can occur. We discuss our results in relation to recent experiments on Kin-13 motor proteins [2]. [1] A.W. Hunter, et al., Mol. Cell 11, 445 (2003) [2] G.Klein, et al., submitted

Klein, Gernot

2005-03-01

434

An Information Fusion Framework for Threat Assessment  

SciTech Connect

Modern enterprises are becoming increasingly sensitive to the potential destructive power of small groups or individuals with malicious intent. In response, significant investments are being made in developing a means to assess the likelihood of certain threats to their enterprises. Threat assessment needs are typically focused in very specific application areas where current processes rely heavily on human analysis to both combine any available data and draw conclusions about the probability of a threat. A generic approach to threat assessment is proposed, including a threat taxonomy and decision-level information fusion framework, that provides a computational means for merging multi-modal data for the purpose of assessing the presence of a threat. The framework is designed for flexibility, and intentionally accounts for the accuracy of each data source, given the environmental conditions, in order to manage the uncertainty associated with any acquired data. The taxonomy and information fusion framework is described, and discussed in the context of real-world applications such as shipping container security and cyber security.

Beaver, Justin M [ORNL; Kerekes, Ryan A [ORNL; Treadwell, Jim N [ORNL

2009-01-01

435

Terminal Decline in Motor Function  

PubMed Central

The study aim was to test the hypothesis that motor function undergoes accelerated decline proximate to death. As part of a longitudinal clinical-pathologic study, 124 older Catholic nuns, priests, and monks completed at least 7 annual clinical evaluations, died, and underwent brain autopsy and uniform neuropathologic examination. Each evaluation included administration of 11 motor tests and 19 cognitive tests from which global measures of motor and cognitive function were derived. The global motor measure (baseline mean = 0.82, SD=0.21) declined a mean 0.024-unit per year (95% confidence interval [CI]: ?0.032, ?0.016) until a mean of 2.46 years (95% CI: ?2,870, ?2.108) before death when rate of decline increased nearly 5-fold to ?0.117-unit per year (95% CI: ?0.140, ?097). The global cognitive measure (baseline mean =0.07, SD =0.45) declined a mean of 0.027-unit per year (95% CI: ?0.041, ?0.014) until a mean of 2.76 years (95% CI: ?3.157, ?2.372) before death when rate of decline increased more than 13-fold to ?0.371-unit per year (95% CI: ?0.443, ?0.306). Onset of terminal motor decline was highly correlated with onset of terminal cognitive decline (r=0.94, 95% CI: 0.81, 0.99), but rates of motor and cognitive change were not strongly correlated (preterminal r = 0.20, 95% CI: ?0.05, 0.38; terminal r = 0.34, 95% CI: 0.03, 0.62). Higher level of plaques and tangles was associated with earlier onset of terminal decline in motor function, but no pathologic measures were associated with rate of preterminal or terminal motor decline. The results demonstrate that motor and cognitive function both undergo a period of accelerated decline in the last few years of life. PMID:22612603

Wilson, Robert S.; Segawa, Eisuke; Buchman, Aron S.; Boyle, Patricia A.; Hizel, Loren P.; Bennett, David A.

2012-01-01

436

Preserved motor learning after stroke is related to the degree of proprioceptive deficit  

PubMed Central

Background Most motor learning theories posit that proprioceptive sensation serves an important role in acquiring and performing movement patterns. However, we recently demonstrated that experimental disruption of proprioception peripherally altered motor performance but not motor learning in humans. Little work has considered humans with central nervous system damage. The purpose of the present study was to specifically consider the relationship between proprioception and motor learning at the level of the central nervous system in humans. Methods Individuals with chronic (> 6mo) stroke and similarly aged healthy participants performed a continuous tracking task with an embedded repeating segment over two days and returned on a third day for retention testing. A limb-position matching task was used to quantify proprioception. Results Individuals with chronic stroke demonstrated the ability to learn to track a repeating segment; however, the magnitude of behavioral change associated with repeated segment-specific learning was directly related to the integrity of central proprioceptive processing as indexed by our limb-position matching task. Conclusion These results support the importance of central sensory processing for motor learning. The confirmation of central sensory processing dependent motor learning in humans is discussed in the context of our prior report of preserved motor learning when sensation is disrupted peripherally. PMID:19715593

Vidoni, Eric D; Boyd, Lara A

2009-01-01

437

Efficient, Inexpensive Motors: A New Trend in The Motors Market  

E-print Network

meeting CEE criteria ABB 0 100Baldor GE 50 83 Part of Marathon Grainger!Dayton Leeson Lincoln 81 67 46 78 12 24 51 60 67 62 54 Magnetek Marathon Reliance Siemens Sterling Tatung Teco/Westinghouse Toshiba U.S. Motors WEG Table 3... Efficiency List 1 US Motors 86.5 $300 1 Davton 86.5 $300 1 Toshiba 85.5 $286 I Avg. EPACT $303 1.5 US Motors 86.5 $315 1.5 Toshiba 86.5 $315 1.5 AVf!.. EPACT $320 2 Sterling 86.5 $330 2 Toshiba 86.5 $342 2 US Motors 86.5 $342 2 Av/!.. EPACT $352 3...

Wroblewksi, R. G.

438

Usual and virtual reality video game-based physiotherapy for children and youth with acquired brain injuries.  

PubMed

Little is known about how therapists promote learning of functional motor skills for children with acquired brain injuries. This study explores physiotherapists' description of these interventions in comparison to virtual reality (VR) video game-based therapy. Six physiotherapists employed at a children's rehabilitation center participated in semi-structured interviews, which were transcribed and analyzed using thematic analysis. Physiotherapists describe using interventions that motivate children to challenge performance quality and optimize real-life functioning. Intervention strategies are influenced by characteristics of the child, parent availability to practice skills outside therapy, and therapist experience. VR use motivates children to participate, but can influence therapist use of verbal strategies and complicate interventions. Physiotherapists consider unique characteristics of this population when providing interventions that promote learning of motor skills. The VR technology has advantageous features but its use with this population can be challenging; further research is recommended. PMID:21942894

Levac, Danielle; Miller, Patricia; Missiuna, Cheryl

2012-05-01

439

State observer for synchronous motors  

DOEpatents

A state observer driven by measurements of phase voltages and currents for estimating the angular orientation of a rotor of a synchronous motor such as a variable reluctance motor (VRM). Phase voltages and currents are detected and serve as inputs to a state observer. The state observer includes a mathematical model of the electromechanical operation of the synchronous motor. The characteristics of the state observer are selected so that the observer estimates converge to the actual rotor angular orientation and velocity, winding phase flux linkages or currents.

Lang, Jeffrey H. (Waltham, MA)

1994-03-22

440

76 FR 17577 - Increased Scope of Coverage for Electric Motors  

Federal Register 2010, 2011, 2012, 2013

...cover squirrel- Motors. cage induction motors, and therefore, DOE believes...standards only cover squirrel- cage induction motors, and therefore, DOE believes...cover squirrel- Motors. cage induction motors, and therefore, DOE...

2011-03-30

441

26. View, looking east, of motor house; the electric motor ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

26. View, looking east, of motor house; the electric motor and electric-powered winch are housed in section of building to the left. The U-bolt and concrete deadman which anchors the cable of the tramway is to the right. Photo by Jet Lowe, HAER, 1989. - Puget Sound Power & Light Company, White River Hydroelectric Project, 600 North River Avenue, Dieringer, Pierce County, WA

442

Fusion pumped laser  

DOEpatents

The apparatus of this invention may comprise a system for generating laser radiation from a high-energy neutron source. The neutron source is a tokamak fusion reactor generating a long pulse of high-energy neutrons and having a temperature and magnetic field effective to generate a neutron flux of at least 10/sup 15/ neutrons/cm/sup 2//center dot/s. Conversion means are provided adjacent the fusion reactor at a location operable for converting the high-energy neutrons to an energy source with an intensity and energy effective to excite a preselected lasing medium. A lasing medium is spaced about and responsive to the energy source to generate a population inversion effective to support laser oscillations for generating output radiation. 2 figs., 2 tabs.

Pappas, D.S.

1987-07-31

443

Experiments in cold fusion  

SciTech Connect

The work of Steve Jones and others in muon-catalyzed cold fusion of deuterium and hydrogen suggests the possibility of such fusion catalyzed by ions, or combinations of atoms, or more-or-less free electrons in solid and liquid materials. A hint that this might occur naturally comes from the heat generated in volcanic action in subduction zones on the earth. It is questionable whether the potential energy of material raised to the height of a midocean ridge and falling to the depth of an ocean trench can produce the geothermal effects seen in the volcanoes of subduction zones. If the ridge, the trench, the plates, and the asthenosphere are merely visible effects of deeper density-gradient driven circulations, it is still uncertain that observed energy-concentration effects fit the models.

Palmer, E.P.

1986-03-28

444

Community-acquired pneumonia and nursing home-acquired pneumonia in the very elderly patients.  

PubMed

The rapid increase in the elderly population is leading to a corresponding increase in the number of people requiring medical care. To date no comparative study between community-acquired pneumonia (CAP) and nursing home-acquired pneumonia (NHAP) has been reported in the very elderly non-intubated patients. The present study was undertaken to compare the clinical characteristics and microbial etiology between CAP and NHAP in elderly patients >/=85-years old. There were 54 patients with NHAP and 47 with CAP. Performance status was significantly worse in the NHAP than in the CAP group. Among all patients, the most frequent pathogens were Chlamydophilia pneumoniae followed by Streptococcus pneumoniae, Mycoplasma pneumoniae influenza virus and Staphylococcus aureus. The frequency of S. peumoniae was significantly higher in NHAP patients than in CAP patients after adjusting for age and sex. Physical activity, nutrition status and dehydration were significant prognostic factors of pneumonia among all patients. In-hospital mortality was significantly higher in NHAP than in CAP after adjusting for age and sex. This study demonstrated that the etiology and clinical outcome differ between CAP and NHAP patients in the very elderly non-intubated population. PMID:20060700

Maruyama, Takaya; Gabazza, Esteban C; Morser, John; Takagi, Takehiro; D'Alessandro-Gabazza, Corina; Hirohata, Shizu; Nakayama, Sei; Ramirez, Alexis Y; Fujiwara, Atsushi; Naito, Masahiro; Nishikubo, Kimiaki; Yuda, Hisamichi; Yoshida, Masamichi; Takei, Yoshiyuki; Taguchi, Osamu

2010-04-01

445

Solar fusion cross sections  

Microsoft Academic Search

We review and analyze the available information on the nuclear-fusion cross sections that are most important for solar energy generation and solar neutrino production. We provide best values for the low-energy cross-section factors and, wherever possible, estimates of the uncertainties. We also describe the most important experiments and calculations that are required in order to improve our knowledge of solar

Eric G. Adelberger; Sam M. Austin; John N. Bahcall; A. B. Balantekin; Gilles Bogaert; Lowell S. Brown; Lothar Buchmann; F. Edward Cecil; Arthur E. Champagne; Ludwig de Braeckeleer; Charles A. Duba; Steven R. Elliott; Stuart J. Freedman; Moshe Gai; G. Goldring; Christopher R. Gould; Andrei Gruzinov; Wick C. Haxton; Karsten M. Heeger; Ernest Henley; Calvin W. Johnson; Marc Kamionkowski; Ralph W. Kavanagh; Steven E. Koonin; Kuniharu Kubodera; Karlheinz Langanke; Tohru Motobayashi; Vijay Pandharipande; Peter Parker; R. G. Robertson; Claus Rolfs; R. F. Sawyer; N. Shaviv; T. D. Shoppa; K. A. Snover; Erik Swanson; Robert E. Tribble; Sylvaine Turck-Chièze; John F. Wilkerson

1998-01-01

446

Teachers Debate Cold Fusion  

NASA Astrophysics Data System (ADS)

What follows is a collection of messages about cold fusion from teachers. The messages were posted on the internet discussion list, Phys-L, or were sent to me in private. They illustrate a wide range of opinion. Phys-L is a list dedicated to learning and teaching physics with 700 subscribers from over 35 countries, the majority of whom are physics educators. <>.

Kowalski, Ludwik

2005-12-01

447

Inertial Confinement fusion targets  

NASA Technical Reports Server (NTRS)

Inertial confinement fusion (ICF) targets are made as simple flat discs, as hollow shells or as complicated multilayer structures. Many techniques were devised for producing the targets. Glass and metal shells are made by using drop and bubble techniques. Solid hydrogen shells are also produced by adapting old methods to the solution of modern problems. Some of these techniques, problems, and solutions are discussed. In addition, the applications of many of the techniques to fabrication of ICF targets is presented.

Hendricks, C. D.

1982-01-01

448

Fusion development and technology  

SciTech Connect

This report discusses the following: superconducting magnet technology; high field superconductors; advanced magnetic system and divertor development; poloidal field coils; gyrotron development; commercial reactor studies--aries; ITER physics: alpha physics and alcator R D for ITER; lower hybrid current drive and heating in the ITER device; ITER superconducting PF scenario and magnet analysis; ITER systems studies; and safety, environmental and economic factors in fusion development.

Montgomery, D.B.

1992-01-01

449

(Fusion energy research)  

SciTech Connect

This report discusses the following topics: principal parameters achieved in experimental devices (FY88); tokamak fusion test reactor; Princeton beta Experiment-Modification; S-1 Spheromak; current drive experiment; x-ray laser studies; spacecraft glow experiment; plasma deposition and etching of thin films; theoretical plasma; tokamak modeling; compact ignition tokamak; international thermonuclear experimental reactor; Engineering Department; Project Planning and Safety Office; quality assurance and reliability; and technology transfer.

Phillips, C.A. (ed.)

1988-01-01

450

Pulsed nuclear fusion reactor  

Microsoft Academic Search

This invention relates to a nuclear fusion power plant for producing useful electrical energy by nuclear combustion of deuterium and lithium to helium. A large concentric plate capacitor is discharged rapidly through a mass of molten lid1-xtx (O

1980-01-01

451

Cold fusion prospects  

Microsoft Academic Search

The requirements for cold fusion may include, but are not limited to the following: a nuclear mass-energy resonance with an excitation level in the compound nucleus or in two output nuclei; very high density; a large neutron capture cross-section isotope and a neutron-rich isotope; overlapping de Broglie interaction wavelengths; nuclear spin and polarizability compatibility; and\\/or catalytic action by a passing

1989-01-01

452

Primary motor cortex disinhibition during motor skill learning.  

PubMed

Motor learning requires practice over a period of time and depends on brain plasticity, yet even for relatively simple movements, there are multiple practice strategies that can be used for skill acquisition. We investigated the role of intracortical inhibition in the primary motor cortex (M1) during motor skill learning. Event-related transcranial magnetic stimulation (TMS) was used to assess corticomotor excitability and inhibition thought to involve synaptic and extrasynaptic ?-aminobutyric acid (GABA). Short intracortical inhibition (SICI) was assessed using 1- and 2.5-ms interstimulus intervals (ISIs). Participants learned a novel, sequential pinch-grip task on a computer in either a repetitive or interleaved practice structure. Both practice structures showed equivalent levels of motor performance at the end of acquisition and at retention 1 wk later. There was a novel task-related modulation of 1-ms SICI. Repetitive practice elicited a greater reduction of 1- and 2.5-ms SICI, i.e., disinhibition, between rest and task acquisition, compared with interleaved practice. These novel findings support the use of a repetitive practice structure for motor learning because the associated effects within M1 have relevance for motor rehabilitation. PMID:24717346

Coxon, James P; Peat, Nicola M; Byblow, Winston D

2014-07-01

453

[Venous thromboembolic pathology. New acquired risk factors or new data on acquired risk factors].  

PubMed

Many acquired risk factors may be identified to avoid the scholarly nature of these interminable lists, they may be reclassified with respect to their originality or their mechanism of action and those of current interest, whose data is still often hypothetical but recent, can be underlined. The following order may be proposed: risk factors which cannot be changed: age (which remains the principal factor) and gender (women being at higher risk than men); true acquired risk factors such as cancer, dysimmune conditions (more specifically, the antiphospholipid syndrome) and hormone replacement therapy (oestroprogestative contraception which has been updated by the debate about "third generation pills" and the risk related to progesterone-like substances themselves; hormone replacement therapy of the menopause which still has no clinical trials to assess "our" forms with natural hormones administered transdermally or transmucosally). Smoking has also been accused of being a risk factor for venous thrombosis in the latest clinical trials. Metabolic factors increase the risk of thrombosis: this is established for obesity, still suspected for hyperhomocystonaemia, the abnormalities being the result of complex gene-environment interactions. Other dysmetabolic conditions (diabetes, hypercholesterolaemia, hypertriglyceridaemia), responsible for arterial complications, are not clearly related to increased venous thromboembolic risk although a preventive effect of statins (yet another I) has just been reported. Similarly to these metabolic factors, the origin of which, genetic or environmental, is difficult to establish, interest has recently been shown in quantitative and functional changes in blood clotting factors. This has been established for arterial disease for fibrinogen but, in addition to this factor which slightly increases the risk of venous thrombosis, increases of factor VIII independent of inflammatory conditions, of blood group and Von Willebrand factor, which all influence the level of factor VIII, an increase by 150% of the normal increases the risk of venous thromboembolic disease by 3 or 4 times. As for factor VIII, increases in factor IX, factor XI, and resistance to activated C protein (independently of the Leiden mutation on the gene for factor V), are also associated in increased venous thromboembolic risk. Without knowing into which category to classify them, previous personal and family history of thromboembolic disease, in the absence of the already mentioned hereditary risk factors, must be noted. Finally, amongst the acquired risk factors, the authors also list conditions of blood stasis and vascular lesions with or without hypercoagulability (surgery, prolonged hospital stays, cardiac failure, paralysis, pregnancy...). Of these acquired conditions which increase the risk of thrombotic complications, particular attention has been given over the last few years to forced immobilisation in uncomfortable positions as in certain forms of transport. Although clinical reports have discordant results, it would seem that the risk is increased and the benefits of supportive elastic stockings have been confirmed. If the acquired risk is identified and quantified for a patient, it allows evaluation of global risk and the installation of appropriate therapeutic measures. PMID:11794976

Drouet, L

2001-11-01

454

Cluster-impact fusion: Bridge between hot and cold fusion?  

Microsoft Academic Search

Beams of D2O clusters with 10~1000 eV per deuterium yield unexpectly high fusion rates. This is an energy range intermediate between hot and cold fusion, and as such may serve as a link bridgin the two regimes. We present a theoretical model capable of explaining apparently conflicting experimental results with beams of D2O clusters in which fusion rates higher than

M. Rabinowitz; Y. E. Kim; R. A. Rice; G. S. Chulick

1991-01-01

455

Foxp2 Mutations Impair Auditory-Motor Association Learning  

PubMed Central

Heterozygous mutations of the human FOXP2 transcription factor gene cause the best-described examples of monogenic speech and language disorders. Acquisition of proficient spoken language involves auditory-guided vocal learning, a specialized form of sensory-motor association learning. The impact of etiological Foxp2 mutations on learning of auditory-motor associations in mammals has not been determined yet. Here, we directly assess this type of learning using a newly developed conditioned avoidance paradigm in a shuttle-box for mice. We show striking deficits in mice heterozygous for either of two different Foxp2 mutations previously implicated in human speech disorders. Both mutations cause delays in acquiring new motor skills. The magnitude of impairments in association learning, however, depends on the nature of the mutation. Mice with a missense mutation in the DNA-binding domain are able to learn, but at a much slower rate than wild type animals, while mice carrying an early nonsense mutation learn very little. These results are consistent with expression of Foxp2 in distributed circuits of the cortex, striatum and cerebellum that are known to play key roles in acquisition of motor skills and sensory-motor association learning, and suggest differing in vivo effects for distinct variants of the Foxp2 protein. Given the importance of such networks for the acquisition of human spoken language, and the fact that similar mutations in human FOXP2 cause problems with speech development, this work opens up a new perspective on the use of mouse models for understanding pathways underlying speech and language disorders. PMID:22412993

Kurt, Simone; Fisher, Simon E.; Ehret, Gunter

2012-01-01

456

Extraocular Motoneuron Stimulation Frequency Effects on Motor Unit Tension in Cat  

Microsoft Academic Search

The contractile characteristics of 47 twitch and 3 nontwitch lateral rectus motor units in 11 cats were examined using two different stimulation paradigms derived from observed motoneuron firing frequencies in alert animals. The twitch units showed an average twitch tension (46.0 ± 8.1 mg), contraction time (6.15 ± 0.26 ms) and median fusion frequency (170 Hz) consistent with previous studies,

M. S. Shall; K. E. Wilson; S. J. Goldberg

1996-01-01

457

Mechanical thermal motor  

NASA Technical Reports Server (NTRS)

An apparatus is described for converting thermal energy such as solar energy into mechanical motion for driving fluid pumps and similar equipment. The thermal motor comprises an inner concentric cylinder carried by a stationary core member. The core member has a cylindrical disc plate fixed adjacent to a lower portion and extending radially from it. An outer concentric cylinder rotatably carried on the disc plate defining a space between the inner and outer concentric cylinders. A spiral tubular member encircles the inner concentric cylinder and is contained within the space between the inner and outer cylinders. One portion is connected to the inner concentric cylinder and a second portion connected to the outer concentric cylinder. A heated fluid is conveyed through the tubular member and is periodically cooled causing the tubular member to expand and contract. This causes the outer concentric cylinder to reciprocally rotate on the base plate accordingly. The reciprocating motion of the outer concentric cylinder is then utilized to drive a pump member in a pump chamber.

Hein, L. A.; Myers, W. N. (inventors)

1976-01-01

458

Plasma motor generator system  

NASA Technical Reports Server (NTRS)

The significant potential advantages of a plasma motor generator system over conventional systems for the generation of electrical power and propulsion for spacecraft in low Earth orbits warrants its further investigation. The two main components of such a system are a long insulated wire and the plasma generating hollow cathodes needed to maintain electrical contact with the ionosphere. Results of preliminary theoretical and experimental investigations of this system are presented. The theoretical work involved the equilibrium configurations of the wire and the nature of small oscillation about these equilibrium positions. A particularly interesting result was that two different configurations are allowed when the current is above a critical value. Experimental investigations were made of the optimal starting and running conditions for the proposed, low current hollow cathodes. Although optimal ranges of temperature, argon pressure and discharge voltage were identified, start up became progressively more difficult. This supposed depletion or contamination of the emissive surface could be countered by the addition of new emissive material.

Hite, Gerald E.

1987-01-01

459

Recover Power with Hydraulic Motors  

E-print Network

Anywhere liquid pressure is reduced across a throttling device, there is a potential application for a hydraulic power recovery motor (HPRM). Cost of power makes HPRM's attractive with recoveries as small as 25 hp on a continuous basis. When...

Brennan, J. R.

1982-01-01

460

Small Solid Rocket Motor Test  

NASA Video Gallery

It was three-two-one to brilliant fire as NASA's Marshall Space Flight Center tested a small solid rocket motor designed to mimic NASA's Space Launch System booster. The Mar. 14 test provides a qui...

461

Prognosis of motor development and joint hypermobility  

Microsoft Academic Search

In a study of 59 infants aged 18 months there were 20 with joint hypermobility and delayed motor development, 19 with joint hypermobility and normal motor development, and 20 normal controls. They were reassessed for motor function 3.5 years later at the age of 5 years. Both gross and fine motor performance were significantly delayed in the group of children

E Tirosh; M Jaffe; R Marmur; Y Taub; Z Rosenberg

1991-01-01

462

Forward Models for Physiological Motor Control  

Microsoft Academic Search

Based on theoretical and computational studies it has been suggested that the central nervous system (CNS) internally simulates the behaviour of the motor system in planning, control and learning. Such an internal “forward” model is a representation of the motor system that uses the current state of the motor system and motor command to predict the next state. We will

R. C. Miall; Daniel M. Wolpert

1996-01-01

463

Microcomputer Control for Sensorless Brushless Motor  

Microsoft Academic Search

The microcomputer control of a brushless motor without a shaft position sensor is studied. A method which permits the determination of the permanent magnet rotor position by the back electromotive force (EMF) induced in the stator windings and the starting technique which uses the motor as a synchronous motor at standstill are explained. The motor voltage is chopped by commutator

Kenichi Iizuka; Hideo Uzuhashi; Minoru Kano; Tsunehiro Endo; Katsuo Mohri

1985-01-01

464

Assessment of motor recovery and decline  

Microsoft Academic Search

Assessment of motor disorders forms an important ingredient of neurology, rehabilitation medicine and orthopaedics. Until now, however, many of the employed assessment tools are derived from empirical knowledge. Almost no relation exists with modern theoretical notions about motor control. In the present article, motor control theory is reviewed in the light of its potential contribution to understanding motor recovery. An

Theo Mulder; Wiebren Zijlstra; Alexander Geurts

2002-01-01

465

Motor Development: From Classroom to Playground.  

ERIC Educational Resources Information Center

Intended for the educator and recreator working with normal and exceptional children, the book provides an overview of perceptual motor terminology, development, and resources in addition to a state of the art paper. Presented are definitions of such terms as motor development, sensory motor development, and perceptual motor development.…

Fain, Gerald S., Ed.; Burkhart, Ernie, Ed.

466

Proprioception and Motor Control in Parkinson's Disease  

Microsoft Academic Search

Parkinson's disease (PD) is a neurodegenerative disorder that leads to a progressive decline in motor function. Growing evidence indicates that PD patients also experience an array of sensory problems that negatively impact motor function. This is especially true for proprioceptive deficits, which profoundly degrade motor performance. This review specifically address the relation between proprioception and motor impairments in PD. It

Jürgen Konczak; Daniel M. Corcos; Fay Horak; Howard Poizner; Mark Shapiro; Paul Tuite; Jens Volkmann; Matthias Maschke

2009-01-01

467

Modeling of permanent magnet motor drives  

Microsoft Academic Search

Research has indicated that the permanent magnet motor drives, which include the permanent magnet synchronous motor (PMSM) and the brushless DC motor (BDCM) could become serious competitors to the induction motor for servo applications. The PMSM has a sinusoidal back EMF and requires sinusoidal stator currents to produce constant torque while the BDCM has a trapezoidal back EMF and requires

PRAGASAN PILLAY; R. Krishnan

1988-01-01

468

Increased Fibroblast Elastase Activity in Acquired Cutis laxa  

Microsoft Academic Search

Background: Acquired cutis laxa is a rare disease characterized by sagging skin, premature wrinkling and reduced skin elasticity. Observation: We report a 21-year-old woman, who presented with acquired cutis laxa on the face and the ear lobes. Urticarial papules had preceded for 6 years. There was no systemic involvement. Skin specimens were obtained from lax skin and urticarial papules, and

A. Bouloc; G. Godeau; J. Zeller; J. Wechsler; J. Revuz; A. Cosnes

1999-01-01

469

Acquired hypothyroidism due to iodine deficiency in an American child.  

PubMed

Abstract Acquired hypothyroidism secondary to iodine deficiency is rarely reported in iodine-replete environments. The case of a 9-year-old patient with severe acquired hypothyroidism due to iodine deficiency is presented. His deficiency occurred because of a restrictive diet used to control eosinophilic esophagitis. Hypothyroidism and iodine deficiency were quickly corrected with a kelp supplement. PMID:25003378

Brooks, Merrian J; Post, Ernest M

2014-11-01

470

Acquiring Mobile Robot Behaviors by Learning Trajectory Velocities  

E-print Network

Acquiring Mobile Robot Behaviors by Learning Trajectory Velocities KOREN WARD School of Information describes a robot learning method which enables a mobile robot to simultaneously acquire the ability problem. We provide experimental results to verify our robot learning method by using a mobile robot

Ward, Koren

471

Performance of serial acquirers: toward an acquisition program perspective  

Microsoft Academic Search

Based on an analysis of the most active acquirers in seven industry sectors in the United States in the 1990s, we find that both a high rate of acquisitions and a high variability of the rate are negatively related to performance. An acquirer's size, the scope of its acquisition program, and acquisition experience moderate the relationship by weakening the negative

Tomi Laamanen; Thomas Keil

2008-01-01

472

Appropriateness of Hospitalization of Patients With Community-Acquired Pneumonia  

Microsoft Academic Search

Study objective: To investigate the association between the appropriateness of hospitalization and the course of hospitalization in patients with community-acquired pneumonia (CAP). Methods: We carried out a prospective study of 346 adult patients hospitalized with community-acquired pneumonia (CAP). Appropriateness of hospitalization was assessed with a modified appropriateness evaluation protocol (AEP) based on vital signs and laboratory tests. Hospitalizations that ended

Avi Porath; Fransisc Schlaeffer; David Lieberman

1996-01-01

473

A hospital study of community acquired pneumonia in the elderly  

Microsoft Academic Search

Studies on community acquired pneumonia in the United States in patients over the age of 65 years have shown that Gram negative bacilli account for an appreciable proportion of cases, in addition to usual pathogens such as Streptococcus pneumoniae and Haemophilus influenzae. There have been no reports of community acquired pneumonia in the elderly in the United Kingdom. We undertook

P Venkatesan; J Gladman; J T Macfarlane; D Barer; P Berman; W Kinnear; R G Finch

1990-01-01

474

Building and Acquiring Resources for Biomedical Language Processing  

E-print Network

Building and Acquiring Resources for Biomedical Language Processing Pierre Zweigenbaum LIMSI, CNRS (Orsay, France) http://www.limsi.fr/~pz/ Second Workshop on Building and Evaluating Resources for Biomedical Text Mining LREC 2010, Valetta, 18 May 2010 Pierre Zweigenbaum, LIMSI, CNRS Acquiring Resources

Zweigenbaum, Pierre

475

Acquiring Knowledge of Derived Nominals and Derived Adjectives in Context  

ERIC Educational Resources Information Center

Purpose: This research investigated children's ability to acquire semantic and syntactic knowledge of derived nominals and derived adjectives in the context of short passages. The study also investigated the relation of morphological awareness and the ability to acquire knowledge of derived words in context. Method: A total of 106 children in…

Marinellie, Sally A.; Kneile, Lynn A.

2012-01-01

476

A linear induction motor conveyer  

E-print Network

magnetic waves, One wave is created by three phase current flowing through the coils, and the other wave results from a current induced in the parts, Such a conveyer is constructed and then studied with respect to efficiency and f'easibil ity... List of Figures Chapter I. INTRODUCTION II. LITERATURE SURVEY Material Handling: State of the Art History of I inear Induction Motors Uses of Linear Motors III. THEORY: PART I A Look at Transverse Waves Magnetic Fields IV. THEORY: PART II...

Solinsky, Kenneth Sheldon

2012-06-07

477

Meissner-Effect Stepping Motor  

NASA Technical Reports Server (NTRS)

Proposed stepping motor derives torque from diamagnetic repulsion produced by Meissner effect - exclusion of magnetic field from interior of superconductor. Design of motor takes advantage of silver-doped YB2Cu3O and other compounds superconductive at temperatures as high as that of liquid nitrogen. Skin of rotor cooled below its superconducting-transition temperature by liquid nitrogen. O-rings prevent leaks of liquid nitrogen from rotor. Weight, cost, and maintenance reduced.

Robertson, Glen A.

1991-01-01

478

Direct drive field actuator motors  

SciTech Connect

A positive-drive field actuator motor is described which includes a stator carrying at least one field actuator which changes in dimension responsive to application of an energy field, and at least one drive shoe movable by the dimensional changes of the field actuator to contact and move a rotor element with respect to the stator. Various embodiments of the motor are disclosed, and the rotor element may be moved linearly or arcuately. 62 figs.

Grahn, A.R.

1998-03-10

479

Direct drive field actuator motors  

DOEpatents

A positive-drive field actuator motor including a stator carrying at least one field actuator which changes in dimension responsive to application of an energy field, and at least one drive shoe movable by the dimensional changes of the field actuator to contact and move a rotor element with respect to the stator. Various embodiments of the motor are disclosed, and the rotor element may be moved linearly or arcuately.

Grahn, Allen R. (Salt Lake City, UT)

1998-01-01

480

Segmented rail linear induction motor  

SciTech Connect

A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces.

Cowan, Jr., Maynard (1107 Stagecoach Rd. SE., Albuquerque, NM 87123); Marder, Barry M. (1412 Pinnacle View Dr. NE., Albuquerque, NM 87123)

1996-01-01

481

Segmented rail linear induction motor  

DOEpatents

A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces. 6 figs.

Cowan, M. Jr.; Marder, B.M.

1996-09-03

482

Fusion Policy Advisory Committee FINAL REPORT  

E-print Network

Fusion Policy Advisory Committee (FPAC) FINAL REPORT September 1990 Report of the Technical Panel on Magnetic Fusion of the Energy Research Advisory Board Washington, D .C. 20585 #12;#12;Fusion Policy of your Fusion Policy Advisory Committee. It presents a fusion policy that the Committee believes

483

MMMMaaaaggggnnnneeeettttiiiicccc FFFFuuuussssiiiioooonnnn EEEEnnnneeeerrrrggggyyyy MAGNETIC FUSION ENERGY  

E-print Network

FusionPlasma ScienceandTechnology Attractive Fusion Energy Previous Strategy Basic Plasma Science Innovative Concepts Science of Magnetic Fusion · The Magnetic Fusion Energy Portfolio · Science and Technology Spin Advanced Tokamaks Tokamaks NEW FUSION PROGRAM STRATEGY Portfolio of innovative concepts, including inertial

484

Supplementary motor area (SMA) volume is associated with psychotic aberrant motor behaviour of patients with schizophrenia.  

PubMed

We aimed to investigate whether aberrant motor behavior in schizophrenia was associated with structural alterations in the motor system. Whole brain voxel based morphometry of patients with different severity of motor symptoms identified altered gray matter volume in the supplementary motor area (SMA), a key region of the motor system. PMID:24853647

Stegmayer, Katharina; Horn, Helge; Federspiel, Andrea; Razavi, Nadja; Bracht, Tobias; Laimböck, Karin; Strik, Werner; Dierks, Thomas; Wiest, Roland; Müller, Thomas J; Walther, Sebastian

2014-07-30

485

The Infant Motor Profile: A Standardized and Qualitative Method to Assess Motor Behaviour in Infancy  

ERIC Educational Resources Information Center

A reliable and valid instrument to assess neuromotor condition in infancy is a prerequisite for early detection of developmental motor disorders. We developed a video-based assessment of motor behaviour, the Infant Motor Profile (IMP), to evaluate motor abilities, movement variability, ability to select motor strategies, movement symmetry, and…

Heineman, Kirsten R.; Bos, Arend F.; Hadders-Algra, Mijna

2008-01-01

486

Motor skills and motor learning in Lurcher mutant mice during aging  

Microsoft Academic Search

Motor learning abilities on the rotorod and motor skills (muscular strength, motor coordination, static and dynamic equilibrium) were investigated in three-, nine-, 15- and 21-month-old Lurcher and control mice. Animals were subjected to motor training on the rotorod before being subjected to motor skills tests. The results showed that control mice exhibited decrease of muscular strength and specific equilibrium impairments

P Hilber; J Caston

2001-01-01

487

Sensor fusion for synthetic vision  

NASA Technical Reports Server (NTRS)

Display methodologies are explored for fusing images gathered by millimeter wave sensors with images rendered from an on-board terrain data base to facilitate visually guided flight and ground operations in low visibility conditions. An approach to fusion based on multiresolution image representation and processing is described which facilitates fusion of images differing in resolution within and between images. To investigate possible fusion methods, a workstation-based simulation environment is being developed.

Pavel, M.; Larimer, J.; Ahumada, A.

1991-01-01

488

Performance Assessment of Image Fusion  

Microsoft Academic Search

\\u000a Performances evaluation method that can compare and analyze different fusion techniques is an essential part of image fusion\\u000a techniques. In this paper we propose a performance assessment method for image fusion techniques based on accurate measurement\\u000a of general relationship among a image set. Numerical verifications, using data constructed from four kinds of typical relations\\u000a and multi-variable time series generated from

Qiang Wang; Yi Shen

2006-01-01

489

More searches for cold fusion  

Microsoft Academic Search

Following the announcement of cold nuclear fusion being observed in electrochemical cells by Fleischmann and Pons1 and by Jones,2 we have searched for the characteristic radiations of thed+d andp+d fusion reactions in cells similar to those described in Refs. 1 and 2. No fusion product neutrons or gamma rays have been observed from either palladium or titanium cathodes. From measured

R. A. Henderson; K. R. Czerwinski; H. L. Hall; K. T. Lesko; E. B. Norman; B. Sur; D. C. Hoffman

1990-01-01

490

Paroxysmal sympathetic hyperactivity after acquired brain injury: consensus on conceptual definition, nomenclature, and diagnostic criteria.  

PubMed

A syndrome of paroxysmal, episodic sympathetic hyperactivity after acquired brain injury has been recognized for almost 60 years. This project sought to simplify the confused nomenclature for the condition (>31 eponyms) and simplify the nine overlapping sets of diagnostic criteria. A consensus-developed questionnaire based on a systematic review of the literature was circulated to a widely representative, international expert group utilizing a Delphi approach. Diagnostic criteria were dropped if group consensus failed to agree on their relative importance, with a goal of reaching a Cronbach ? of 0.8 (suitable for research purposes). The resulting criteria were combined into an assessment measure for clinical and research settings. The consensus group recommend that the term "paroxysmal sympathetic hyperactivity" replace previous terms to describe the "syndrome, recognised in a subgroup of survivors of severe acquired brain injury, of simultaneous, paroxysmal transient increases in sympathetic [elevated heart rate, blood pressure, respiratory rate, temperature, sweating] and motor [posturing] activity." An 11 point probabilistic diagnostic scale was developed with reference to published criteria, yielding an acceptable Cronbach ? of 0.8. These 11 items were proceduralized and combined with a symptom severity index to produce a diagnostic tool for use with adults (the paroxysmal sympathetic hyperactivity assessment measure [PSH-AM]). Development of a pediatric version of the scale and further research into the validity of the PSH-AM is recommended. The consensus position builds on previous literature to establish diagnostic definitions and criteria, an important move to standardize research and management of this condition. PMID:24731076

Baguley, Ian J; Perkes, Iain E; Fernandez-Ortega, Juan-Francisco; Rabinstein, Alejandro A; Dolce, Giuliano; Hendricks, Henk T

2014-09-01

491

Why are Korean tense stops acquired so early: The role of acoustic properties  

PubMed Central

Transcription-based studies have shown that tense stops appear before aspirated or lax stops in most Korean-acquiring children's speech. This order of mastery is predicted by the short lag Voice Onset Time (VOT) values of Korean tense stops, as this is the earliest acquired phonation type across languages. However, the tense stop also has greater motor demands than the other two phonation types, given its pressed voice quality (negative H1-H2) and its relatively high f0 value at vowel onset, word-initially. In order to explain the observed order of mastery of Korean stops, we need a more sensitive quantitative model of the role of multiple acoustic parameters in production and perception. This study explores the relationship between native speakers' transcriptions/categorizations of children's stop productions and three acoustic characteristics (VOT, H1-H2 and f0). The results showed that the primary acoustic parameter that adult listeners used to differentiate tense vs. non-tense stops was VOT. Listeners used VOT and the additional acoustic parameter of f0 to differentiate lax vs. aspirated stops. Thus, the early acquisition of tense stops is explained both by their short-lag VOT values and the fact that children need to learn to control only a single acoustic parameter to produce them. PMID:21643475

Kong, Eun Jong; Beckman, Mary E.; Edwards, Jan

2011-01-01

492

Registration and Fusion of Multiple Source Remotely Sensed Image Data  

NASA Technical Reports Server (NTRS)

Earth and Space Science often involve the comparison, fusion, and integration of multiple types of remotely sensed data at various temporal, radiometric, and spatial resolutions. Results of this integration may be utilized for global change analysis, global coverage of an area at multiple resolutions, map updating or validation of new instruments, as well as integration of data provided by multiple instruments carried on multiple platforms, e.g. in spacecraft constellations or fleets of planetary rovers. Our focus is on developing methods to perform fast, accurate and automatic image registration and fusion. General methods for automatic image registration are being reviewed and evaluated. Various choices for feature extraction, feature matching and similarity measurements are being compared, including wavelet-based algorithms, mutual information and statistically robust techniques. Our work also involves studies related to image fusion and investigates dimension reduction and co-kriging for application-dependent fusion. All methods are being tested using several multi-sensor datasets, acquired at EOS Core Sites, and including multiple sensors such as IKONOS, Landsat-7/ETM+, EO1/ALI and Hyperion, MODIS, and SeaWIFS instruments. Issues related to the coregistration of data from the same platform (i.e., AIRS and MODIS from Aqua) or from several platforms of the A-train (i.e., MLS, HIRDLS, OMI from Aura with AIRS and MODIS from Terra and Aqua) will also be considered.

LeMoigne, Jacqueline

2004-01-01