Sample records for lateral durante atividades

  1. Influência da utilização da órtese de tornozelo durante atividades do voleibol: avaliação eletromiográfica

    Microsoft Academic Search

    Jefferson Rosa Cardoso; Christiane de Souza Macedo Guerino; Marcelo Bannwart Santos; Thiago André Del Arco Mustafá; Anália Rosário Lopes; Marcelo Costa de Paula

    2005-01-01

    RESUMO Entorse de tornozelo é a lesão aguda mais freqüentemente en- contrada no voleibol. Com o intuito de prevenir a ocorrência de lesões de tornozelos, foram desenvolvidos equipamentos profilá- ticos, como as órteses. O objetivo deste estudo foi avaliar o de- sempenho dos músculos do tornozelo (tibial anterior, fibular longo e gastrocnêmio - porção medial e lateral) por meio da

  2. Will Durant Foundation

    NSDL National Science Digital Library

    2001-01-01

    While Will Durant is most well-known for his massive 11 volume Story of Civilization, the Will Durant Foundation Web site tells visitors about some of his other projects and life achievements, along with those of his wife, Ariel Durant. The site begins with a short essay offering a brief synopsis of Durant's life, including his relationship with his wife and the publishing icons Dick Simon and Max Schuster. The site contains articles written by Will Durant on a variety of subjects ranging from ancient Greece to the nature of civilization. For those interested in asking questions about Durant and his work, there is also an open and moderated discussion forum, along with a place for interested visitors to purchase any number of volumes authored by Mr. Durant and his wife.

  3. Cuidados paliativos durante el cáncer

    Cancer.gov

    Hoja informativa que describe la función de los cuidados paliativos, los cuales son los cuidados que se brindan a pacientes que tienen una enfermedad grave o potencialmente letal, como el cáncer, desde el momento del diagnóstico y durante todo el curso de la enfermedad.

  4. Pathways of Lateral Spreading

    Microsoft Academic Search

    U. Jacobi; S. Schanzer; H.-J. Weigmann; A. Patzelt; T. Vergou; W. Sterry; J. Lademann

    2011-01-01

    In the case of topically applied substances, usually both lateral spreading and competitive penetration into the skin occur in parallel. In the present study, the pathways of lateral spreading were studied quantitatively and visually. The local distribution and lateral spreading of the UV filter substance butyl methoxydibenzoylmethane applied in an o\\/w emulsion was studied on the forearm and the back.

  5. Lateral superlattice solar cells

    Microsoft Academic Search

    A. Mascarenhas; Yong Zhang; J. Mirecki Millunchick; R. D. Twesten; E. D. Jones

    1997-01-01

    A novel structure which comprises of a lateral superlattice as the active layer of a solar cell is proposed. If the alternating regions A and B of a lateral superlattice ABABAB... are chosen to have a Type-II band offset, it is shown that the performance of the active absorbing region of the solar cell is optimized. In essence, the Type-II

  6. Lateral subtalar dislocation.

    PubMed

    Sharda, Praveen; DuFosse, Julian

    2008-07-01

    Subtalar dislocations are rare in routine orthopedic practice. While many of these dislocations are a result of high-energy injuries such as fall from a height or traffic accidents, it is not uncommon for patients to present after slipping down a few stairs. Two types of dislocation have been described, medial and lateral. The type of dislocation is described according to the position of the foot. In lateral subtalar dislocation the head of talus is found medially and the calcaneus is dislocated laterally. The navicular may lie dorsolateral to the talus. The reverse is true of lateral dislocation. Medial dislocation has been referred to as "basketball foot" due to its preponderance in basketball players.4 The deciding factor is the inverted or everted position of the foot when the force is dissipated through the weak talonavicular and talocalcaneal ligaments. This article presents a case of an adult with lateral subtalar dislocation following a fall. PMID:19292363

  7. Lateral superlattice solar cells

    SciTech Connect

    Mascarenhas, A.; Zhang, Y. [National Renewable Energy Laboratory, Golden, Colorado 80401 (United States); Millunchick, J.M.; Twesten, R.D.; Jones, E.D. [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

    1997-04-01

    A novel structure which comprises of a lateral superlattice as the active layer of a solar cell is proposed. If the alternating regions A and B of a lateral superlattice ABABAB{hor_ellipsis} are chosen to have a Type-II band offset, it is shown that the performance of the active absorbing region of the solar cell is optimized. In essence, the Type-II lateral superlattice region can satisfy the material requirements for an ideal solar cells active absorbing region, i.e. simultaneously having a very high transition probability for photogeneration and a very long minority carrier recombination lifetime. {copyright} {ital 1997 American Institute of Physics.}

  8. Lateral superlattice solar cells

    SciTech Connect

    Mascarenhas, A.; Zhang, Y. [National Renewable Energy Lab., Golden, CO (United States); Millunchick, J.M.; Twesten, R.D.; Jones, E.D. [Sandia National Labs., Albuquerque, NM (United States)

    1997-10-01

    A novel structure which comprises of a lateral superlattice as the active layer of a solar cell is proposed. If the alternating regions A and B of a lateral superlattice ABABAB... are chosen to have a Type-II band offset, it is shown that the performance of the active absorbing region of the solar cell is optimized. In essence, the Type-II lateral superlattice region can satisfy the material requirements for an ideal solar cells active absorbing region, i.e. simultaneously having a very high transition probability for photogeneration and a very long minority carrier recombination lifetime.

  9. Lateral Failure of Spars

    NASA Technical Reports Server (NTRS)

    Bromley, Stevens; Robison, William H , Jr

    1926-01-01

    It was concluded that after the critical span or depth-breadth ratio has been reached, the modulus of rupture varies approximately inversely as the first power of the span and of the depth-breadth ratio. The direction of the lateral deflection is alternate between successive supports. For this reason, we believe that rib spacing along the spar is more important in reducing lateral deflection than the distance between supports at the strut points. Furthermore, we believe that, within the limits of modern design, any increase in distance between strut points can well be compensated for by spacing the ribs closer together, providing the ribs do furnish lateral support.

  10. Primary Lateral Sclerosis

    MedlinePLUS

    ... Sclerosis? Primary lateral sclerosis (PLS) is a rare neuromuscular disease with slowly progressive weakness in voluntary muscle ... NINDS conducts a broad range of research on neuromuscular disorders such as PLS. This research is aimed ...

  11. Amyotrophic Lateral Sclerosis

    MedlinePLUS

    Amyotrophic lateral sclerosis (ALS) is a nervous system disease that attacks nerve cells called neurons in your ... people with ALS die from respiratory failure. The disease usually strikes between age 40 and 60. More ...

  12. Tennis Elbow (Lateral Epicondylitis)

    MedlinePLUS

    ... technique and improper equipment may be risk factors. Unknown Lateral epicondylitis can occur without any recognized repetitive ... This occurence is called “insidious” or of an unknown cause. Symptoms The symptoms of tennis elbow develop ...

  13. Lateral superlattice solar cells

    Microsoft Academic Search

    A. Mascarenhas; Yong Zhang; J. Mirecki Millunchick; R. D. Twesten; E. D. Jones

    1997-01-01

    A novel structure which comprises of a lateral superlattice as the active layer of a solar cell is proposed. If the alternating regions A and B of a lateral superlattice ABABAB&ellip; are chosen to have a Type-II band offset, it is shown that the performance of the active absorbing region of the solar cell is optimized. In essence, the Type-II

  14. Preventing errors in laterality.

    PubMed

    Landau, Elliot; Hirschorn, David; Koutras, Iakovos; Malek, Alexander; Demissie, Seleshie

    2015-04-01

    An error in laterality is the reporting of a finding that is present on the right side as on the left or vice versa. While different medical and surgical specialties have implemented protocols to help prevent such errors, very few studies have been published that describe these errors in radiology reports and ways to prevent them. We devised a system that allows the radiologist to view reports in a separate window, displayed in a simple font and with all terms of laterality highlighted in separate colors. This allows the radiologist to correlate all detected laterality terms of the report with the images open in PACS and correct them before the report is finalized. The system is monitored every time an error in laterality was detected. The system detected 32 errors in laterality over a 7-month period (rate of 0.0007 %), with CT containing the highest error detection rate of all modalities. Significantly, more errors were detected in male patients compared with female patients. In conclusion, our study demonstrated that with our system, laterality errors can be detected and corrected prior to finalizing reports. PMID:25273506

  15. The lateral bending sign.

    PubMed

    Weitz, E M

    1981-01-01

    In lumbar disc herniations, musculoskeletal findings usually predominate at the outset. There is often an acute list or impaired lateral mobility to one side or the other. This finding represents a protective mechanism to splint the affected disc space in the position where the disc prolapse exerts the least possible pressure on the affected nerve root. An attempt was therefore made to determine whether the relationship of the disc herniation to the nerve root could be delineated by having the patient bend maximally to each side. Three hundred patients who would normally be candidates for routine (static) x-ray study of the lumbar spine had lateral bending (dynamic) films instead. These were then correlated with myelograms and/or surgery, when performed. Lateral bending roentgenograms can often pinpoint the level of lumbar disc herniation. PMID:7280828

  16. Lateral Skull Base Surgery

    PubMed Central

    Manolidis, Spiros; Jackson, C. Gary; Von Doersten, Peter G.; Pappas, Dennis; Glasscock, Michael E.

    1997-01-01

    Lateral skull base surgery has remained the surgical frontier of new developments in the treatment of lesions heretofore difficult to access. Examination of surgical results stimulates technical innovation and provides an intervention risk-benefit ratio assessment for particular lesions useful in management planning. With this in mind, we report the updated collective experience with lateral skull base surgery at the Otology Group over the past 20 years. Two hundred ninety-eight patients underwent surgical intervention for lateral skull base lesions. In 81 patients these lesions were malignant; in 217, benign. Of the benign lesions, 165 were glomus tumors: 139 glomus jugulare, 19 glomus vagale, and 7 glomus tympanicum. The remainder comprised 21 menigniomas, 14 neuromas, two neurofibromas, and a small group of much rarer entities. The philosophy of surgical approach, results, and follow-up are discussed. PMID:17171022

  17. Lateral IMPATT diodes

    Microsoft Academic Search

    P. J. Stabile; B. Lalevic

    1989-01-01

    Conventional IMPATT diodes are the highest-power microwave semiconductor devices, but they are difficult to couple light into, challenging to integrate into monolithic circuits, to incorporate a third terminal, or to series combine. The lateral IMPATT diode is proposed as a solution to these problems. This device is planar and features contact and drift regions that are all adjacent to the

  18. Stamina in later life.

    PubMed

    Colerick, E J

    1985-01-01

    Patterns of aging raise a number of important questions concerning the paths to successful adaptation. What gives some older individuals their staying power in the face of misfortune? What causes others to function less effectively when stressed, to resist change? Clearly, the margin of safety, the degree of elasticity and resilience varies across individuals in the later years. This study focuses on event histories and current behavior of 62 elderly men and women (Phase I) and reports by their confidants (N = 62; Phase II). A central proposition, that stamina in later life depends, in part, on the appraisal of previous events involving loss is investigated using a model that incorporates aspects of earlier life, cognitive appraisal and clinically judged dimensions of stamina in old age. Multivariate (particularly path analytic) techniques are used to test the links between variable foci. Results suggest that antecedents of stamina involve the interaction of social resources and cognitive orientations. Specifically, stamina in later life is contingent, for the most part, on a triumphant, positive outlook during periods of adversity. Elderly so oriented are also those with robust health histories and marked educational accomplishments. Conversely, persons who view situations involving loss as threatening, overwhelming and potentially defeating experience no such outcome; low levels of stamina mark their later years. Interestingly, quality childhood ties matter for stamina in old age only by increasing the likelihood of perceptions of a supportive environment during hard times. The findings corroborate the general pattern of research documenting the importance of cognitive orientations in adaptive processes. PMID:4081826

  19. Padrão da prescrição de atividade física realizada por médicos ortopedistas brasileiros

    Microsoft Academic Search

    Alexandre Mader Seixas; Sandra M. M. Matsudo; Victor K. R. Matsudo; Erinaldo L. Andrade; Glaucia F. Braggion

    Objetivo: avaliar a prescrição de atividade física realizada por ortopedistas brasileiros. Metodologia: 521 ortopedistas responderam um questionário sobre prescrição de atividade física. Os parâmetros prescritos de freqüência, duração e intensidade considerados corretos foram: realizar pelo menos 30 minutos contínuos ou acumulados de atividade moderada na maioria dos dias da semana. Utilizada análise estatística descritiva. Resultados: 86,4% prescrevem atividade física para

  20. Amyotrophic lateral sclerosis.

    PubMed

    Mitchell, J D; Borasio, G D

    2007-06-16

    Amyotrophic lateral sclerosis (known in the UK as motor neuron disease) is a devastating illness with uncertain pathogenesis. In this Seminar, we review its natural history, clinical features, diagnostic criteria, variant and mimic syndromes, genetic forms, and epidemiology. Several hypotheses about causes of the disorder are discussed, such as excitotoxicity and oxidant stress, and we review past and present putative disease-modifying treatments. Disease-management strategies, from telling the patient about their illness to end-of-life decisions and palliative care, are presented. We review options for control of the main symptoms of amyotrophic lateral sclerosis--including dysphagia, dysarthria, respiratory distress, pain, and psychological disorders--and care in the terminal phase. The need for good psychosocial and spiritual care of patients and families is emphasised. We conclude with an overview of some current major issues and future prospects, ranging from the search for disease markers to challenging developments such as stem-cell and gene therapy. PMID:17574095

  1. Lateral MEMS microcontact considerations

    Microsoft Academic Search

    Ezekiel J. J. Kruglick; Kristofer S. J. Pister

    1999-01-01

    A lateral switching relay structure has been developed which provides a double gold contact with as low as 70-m? measured contact resistance, 0.45-A current-carrying ability at MEMS compatible force levels, TTL compatible actuation, and air gap isolation when open. The die area used for the relay mechanism itself (distinct from the actuation) is approximately 75 ?m by 100 ?m and

  2. Amyotrophic lateral sclerosis

    Microsoft Academic Search

    Lokesh C Wijesekera; P Nigel Leigh

    2009-01-01

    Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterised by progressive muscular paralysis reflecting degeneration of motor neurones in the primary motor cortex, corticospinal tracts, brainstem and spinal cord. Incidence (average 1.89 per 100,000\\/year) and prevalence (average 5.2 per100,000) are relatively uniform in Western countries, although foci of higher frequency occur in the Western Pacific. The mean age of onset

  3. Lateral transperitoneal laparoscopic adrenalectomy

    Microsoft Academic Search

    Steven J. Shichman; C. D. Anthony Herndon; R. Ernest Sosa; Giles F. Whalen; Dougald C. MacGillivray; Carl D. Malchoff; E. Darracott Vaughan

    1999-01-01

    Several laparoscopic approaches to the adrenal gland have been described. The lateral transperitoneal approach has several\\u000a distinct advantages when contrasted with other techniques for laparoscopic adrenalectomy (LA). We present our technique and\\u000a results obtained in 50 consecutive transperitoneal LAs. We review 50 consecutive laparoscopic adrenalectomies (28 female,\\u000a 19 male) performed from 1993 to 1998. S.J. Shichman or R.E. Sosa was

  4. Start School Later

    NSDL National Science Digital Library

    Last month, Pediatrics, the official journal of the American Academy of Pediatrics (AAP), issued a formal policy statement concerning School Start Times for Adolescents (http://pediatrics.aappublications.org/content/early/2014/08/19/peds.2014-1697.abstract?sid=3f739b0e-a552-4a4a-bd0a-907809e20255). In essence, the AAP called for schools to start later, citing sleep deprivation among teenagers as â??an important public health issue.â? This site from Start School Later, a group advocating for â??health, safety and equity in education,â? provides good, if somewhat one-sided, information on the topic. If youâ??re unfamiliar, start with Research & Info, which provides links to a number of informative sites about adolescent sleep needs and the impact of early school start times. Success Stories takes readers to schools around the country that have experimented with, and benefited from, later start times. If you're inspired, you can also Get Involved. Whatever your position on the issue, this is an informative and interesting site.

  5. Creativity in later life.

    PubMed

    Price, K A; Tinker, A M

    2014-08-01

    The ageing population presents significant challenges for the provision of social and health services. Strategies are needed to enable older people to cope within a society ill prepared for the impacts of these demographic changes. The ability to be creative may be one such strategy. This review outlines the relevant literature and examines current public health policy related to creativity in old age with the aim of highlighting some important issues. As well as looking at the benefits and negative aspects of creative activity in later life they are considered in the context of the theory of "successful ageing". Creative activity plays an important role in the lives of older people promoting social interaction, providing cognitive stimulation and giving a sense of self-worth. Furthermore, it is shown to be useful as a tool in the multi-disciplinary treatment of health problems common in later life such as depression and dementia. There are a number of initiatives to encourage older people to participate in creative activities such as arts-based projects which may range from visual arts to dance to music to intergenerational initiatives. However, participation shows geographical variation and often the responsibility of provision falls to voluntary organisations. Overall, the literature presented suggests that creative activity could be a useful tool for individuals and society. However, further research is needed to establish the key factors which contribute to patterns of improved health and well-being, as well as to explore ways to improve access to services. PMID:24974278

  6. Computer Engineering Curriculum Guidelines Eric Durant (Moderator)

    E-print Network

    Thornton, Mitchell

    Computer Engineering Curriculum Guidelines Eric Durant (Moderator) Electrical Engineering.Impagliazzo@Hofstra.edu Susan Conry Department of Electrical and Computer Engineering Clarkson University Potsdam, New York, USA about the development of computer engineering curricula reports. They will also learn about the revision

  7. Laterally oscillating nitinol engine

    SciTech Connect

    Banks, R.

    1987-09-08

    This patent describes a laterally oscillating nitinol engine comprising: a first L-shaped drive member journalled for pivoting horizontal oscillation about the juncture of the legs of the L-shaped member, a second drive member journalled for pivoting about a point proximate the outboard end of the shorter leg of the L-shaped member at a distance from the pivot journal of the L-shaped member, a bearing block secured to the end of longer leg of the L-shaped and having a guide hole. The second member extending through the guide hole and arranged to reciprocate therein, a shape memory alloy power element disposed in flexure secured at its ends to the bearing block and to the second member intermediate the sliding connection with the bearing block and the pivotal connection of the second member, means for disposing different temperature baths below the element whereby as the drive members oscillate about their journals the element alternately dips into one bath and then the other, and means for absorbing a portion of the energy developed by the engine and moving the power element from the cold bath to the hot bath.

  8. Arthroscopic release for lateral epicondylitis

    Microsoft Academic Search

    Brett D. Owens; Kevin P. Murphy; Timothy R. Kuklo

    2001-01-01

    Purpose: This study was performed to review the results of our early experience with recalcitrant lateral epicondylitis treated arthroscopically. Type of Study: This study is a case series consisting of consecutive patients with lateral epicondylitis treated arthroscopically by 1 surgeon. Methods: Patients failing a minimum of 6 months of conservative treatment underwent arthroscopic release of the extensor carpi radialis brevis

  9. CT navigated lateral interbody fusion.

    PubMed

    Drazin, Doniel; Liu, John C; Acosta, Frank L

    2013-10-01

    Lateral interbody fusion techniques are heavily reliant on fluoroscopy for retractor docking and graft placement, which expose both the patient and surgeon to high doses of radiation. Use of image-guided technologies with CT-based images, however, can eliminate this radiation exposure for the surgeon. We describe the surgical technique of performing lateral lumbar interbody fusion using CT navigation. PMID:23931938

  10. Network Science, A Decade Later.

    ERIC Educational Resources Information Center

    Feldman, Alan; Konold, Cliff; Coulter, Bob

    1999-01-01

    Presents an excerpt from "Network Science, A Decade Later: The Internet and Classroom Learning", a publication based on four years of research that examines the role of technology in fostering inquiry-based approaches to learning. (Author/NB)

  11. Genetics Home Reference: Juvenile primary lateral sclerosis

    MedlinePLUS

    ... PubMed Recent literature OMIM Genetic disorder catalog Conditions > Juvenile primary lateral sclerosis On this page: Description Genetic ... names Glossary definitions Reviewed July 2013 What is juvenile primary lateral sclerosis? Juvenile primary lateral sclerosis is ...

  12. Bilateral Multiple Level Lateral Meningocoele

    PubMed Central

    Kumar, B. E. Panil; Hegde, Kishor V.; Kumari, G. Lalitha; Agrawal, Amit

    2013-01-01

    Lateral meningocoele is a very rare disorder characterized by extensions of the dura and arachnoid through an enlarged neural foramen. We report a case of a 23-year-old female with deformity of spine who presented with low back pain and no neurological deficits. A whole spine magnetic resonance imaging showed multiple well-defined cystic masses involving dorsal, lumbar, and sacral spinal levels bilaterally, with dural ectasia and neural foraminal widening suggestive of bilateral multiple level lateral meningocoele. The patient is being managed conservatively and is on regular follow-up. PMID:23607071

  13. Observation of lateral vehicle dynamics

    Microsoft Academic Search

    U. Kiencke; A. Daiß

    1997-01-01

    By observation of lateral vehicle dynamics the detection of critical driving situations is made possible, as well as the estimation of adhesion characteristics during cornering. This paper presents a comparison of a linear and a nonlinear observer for the vehicle and tyre side-slip angles. The modelling, especially the model reduction and simplification, is shown.

  14. Laterality of Basic Auditory Perception

    PubMed Central

    Sininger, Yvonne S.; Bhatara, Anjali

    2010-01-01

    Laterality (left-right ear differences) of auditory processing was assessed using basic auditory skills: 1) gap detection 2) frequency discrimination and 3) intensity discrimination. Stimuli included tones (500, 1000 and 4000 Hz) and wide-band noise presented monaurally to each ear of typical adult listeners. The hypothesis tested was: processing of tonal stimuli would be enhanced by left ear (LE) stimulation and noise by right ear (RE) presentations. To investigate the limits of laterality by 1) spectral width, a narrow band noise (NBN) of 450 Hz bandwidth was evaluated using intensity discrimination and 2) stimulus duration, 200, 500 and 1000 ms duration tones were evaluated using frequency discrimination. Results A left ear advantage (LEA) was demonstrated with tonal stimuli in all experiments but an expected REA for noise stimuli was not found. The NBN stimulus demonstrated no LEA and was characterized as a noise. No change in laterality was found with changes in stimulus durations. The LEA for tonal stimuli is felt to be due to more direct connections between the left ear and the right auditory cortex which has been shown to be primary for spectral analysis and tonal processing. The lack of a REA for noise stimuli is unexplained. Sex differences in laterality for noise stimuli were noted but were not statistically significant. This study did establish a subtle but clear pattern of LEA for processing of tonal stimuli. PMID:22385138

  15. Laterality of basic auditory perception.

    PubMed

    Sininger, Yvonne S; Bhatara, Anjali

    2012-01-01

    Laterality (left-right ear differences) of auditory processing was assessed using basic auditory skills: (1) gap detection, (2) frequency discrimination, and (3) intensity discrimination. Stimuli included tones (500, 1000, and 4000 Hz) and wide-band noise presented monaurally to each ear of typical adult listeners. The hypothesis tested was that processing of tonal stimuli would be enhanced by left ear (LE) stimulation and noise by right ear (RE) presentations. To investigate the limits of laterality by (1) spectral width, a narrow-band noise (NBN) of 450-Hz bandwidth was evaluated using intensity discrimination, and (2) stimulus duration, 200, 500, and 1000 ms duration tones were evaluated using frequency discrimination. A left ear advantage (LEA) was demonstrated with tonal stimuli in all experiments, but an expected REA for noise stimuli was not found. The NBN stimulus demonstrated no LEA and was characterised as a noise. No change in laterality was found with changes in stimulus durations. The LEA for tonal stimuli is felt to be due to more direct connections between the left ear and the right auditory cortex, which has been shown to be primary for spectral analysis and tonal processing. The lack of a REA for noise stimuli is unexplained. Sex differences in laterality for noise stimuli were noted but were not statistically significant. This study did establish a subtle but clear pattern of LEA for processing of tonal stimuli. PMID:22385138

  16. Functional Lateralization of the Brain.

    ERIC Educational Resources Information Center

    Dean, Raymond S.

    1984-01-01

    Research concerning lateralization of human brain functions is examined in light of the recent publication of the Kaufman Assessment Battery for Children. Following a review of research methodologies and functions ascribed to the hemispheres of the brain, differences are portrayed as complementary and coexisting modes of cognitive processing.…

  17. School Readiness and Later Achievement

    Microsoft Academic Search

    Greg J. Duncan; Chantelle J. Dowsett; Amy Claessens; Katherine Magnuson; Aletha C. Huston; Pamela Klebanov; Linda S. Pagani; Leon Feinstein; Mimi Engel; Jeanne Brooks-Gunn; Holly Sexton; Kathryn Duckworth; Crista Japel

    2007-01-01

    Using 6 longitudinal data sets, the authors estimate links between three key elements of school readiness—school-entry academic, attention, and socioemotional skills—and later school reading and math achievement. In an effort to isolate the effects of these school-entry skills, the authors ensured that most of their regression models control for cognitive, attention, and socioemotional skills measured prior to school entry, as

  18. Sistema integrado de avaliação de impacto ambiental aplicado a atividades do Novo Rural

    Microsoft Academic Search

    Geraldo Stachetti Rodrigues; Clayton Campanhola

    2003-01-01

    (2) Resumo - O objetivo deste trabalho foi apresentar o sistema de Avaliação Ponderada de Impacto Ambiental de Atividades do Novo Rural (APOIA-NovoRural), que consiste de um conjunto de planilhas eletrônicas (plataforma MS-Excel) que integram 62 indicadores da performance ambiental de uma atividade econômica em um estabelecimento rural. Cinco dimensões de avaliação foram consideradas: ecologia da paisagem, qualidade ambiental (atmosfera,

  19. Laterally proximized aluminum tunnel junctions

    NASA Astrophysics Data System (ADS)

    Koski, J. V.; Peltonen, J. T.; Meschke, M.; Pekola, J. P.

    2011-05-01

    This letter presents experiments on junctions fabricated by a technique that enables the use of high-quality aluminum oxide tunnel barriers with normal metal electrodes at low temperatures. Inverse proximity effect is applied to diminish the superconductivity of an aluminum dot through a clean lateral connection to a normal metal electrode. To demonstrate the effectiveness of this method, fully normal-state single electron transistors (SETs) and normal metal-insulator-superconductor (NIS) junctions applying proximized Al junctions were fabricated. The transport characteristics of the junctions were similar to those obtained from standard theoretical models of regular SETs and NIS junctions.

  20. Lateral organic bilayer heterojunction photoconductors

    Microsoft Academic Search

    John C. Ho; Alexi Arango; Vladimir Bulovic

    2008-01-01

    We demonstrate a two-terminal, lateral organic bilayer photoconductor that generates an external quantum efficiency of (12+\\/-1)%, with an internal quantum efficiency of (140+\\/-2)% indicative of photon-to-electron conversion gain. The photoconductor incorporates a heterojunction between N,N'-bis(3-methylphenyl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine (TPD) and 3,4,9,10-perylenetetracarboxylic bisbenzimidazole (PTCBI). Excitons generated with photoexcitation of PTCBI dissociate at the PTCBI\\/TPD interface and raise the charge carrier concentration in TPD, increasing

  1. Kepler: 400 years later Jonas Karlsson

    E-print Network

    Weinberger, Hans

    Kepler: 400 years later #12;Outline Kepler's laws Proof that closed orbits are ellipses The hydrogen atom Geodesic ow and the Kepler manifold Jonas Karlsson Kepler: 400 years later #12;Kepler's laws Johannes Kepler (1571 - 1630) Jonas Karlsson Kepler: 400 years later #12;Kepler's laws First law (1609

  2. Lateral epicondylosis: emerging management options.

    PubMed

    Thompson, Carolyn; Visco, Christopher

    2015-01-01

    Lateral epicondylosis is one of the most prevalent disorders of the arm and results in significantly decreased function among the workforce and athletes. Historically, the disorder has been diagnosed clinically and treated as an inflammatory entity. Management strategies have included anti-inflammatory medications and techniques, including oral nonsteroidal anti-inflammatories, injected corticosteroid, and physical therapy with modalities. More recent literature postulates a degenerative or compressive etiology, directing some clinicians to try new, more regenerative management strategies such as platelet-rich plasma and stem cell injections. To date, literature evaluating these new treatment methods has shown positive results, although no definitive conclusions can be drawn. More research is needed to evaluate these new treatment methods, and a new look at the diagnosis of the disorder with ultrasound imaging may be reasonable to consider. PMID:25968855

  3. Breve panorama del teatro en Ecuador durante los años 80

    E-print Network

    Almeida Naveda, Eduardo

    1992-04-01

    SPRING 1992 87 Breve panorama del teatro en Ecuador durante los años 80 Eduardo Almeida Naveda Las condiciones socio-económicas y la ausencia de políticas culturales firmemente estructuradas en el país no han permitido una permanente actividad...

  4. Eccentricity effects on lateral interactions.

    PubMed

    Shani, Revital; Sagi, Dov

    2005-07-01

    We attempted to resolve an apparent conflict between the lack of psychophysical evidence of collinear facilitation at the near-periphery and physiological evidence from the monkey showing collinear effects extra-fovealy. We compared collinear and orthogonal configurations to discount facilitation due to reduced positional uncertainty. Detection thresholds were measured for Gabor targets at eccentricities of 0 degrees - 4 degrees, flanked by collinear or orthogonal flankers. Like in previous reports in the literature, results varied among subjects when the stimulus position was off-fixation. We found reduced facilitation at eccentricities as small as 1 degrees - 2 degrees. Moreover, facilitation did not increase when the stimuli were M-scaled or when observers received more practice. However, a larger proportion of subjects showed collinear facilitation when attention was directed to the tested configurations. The results suggest that differences in allocation of attention along the visual field may affect the underlying lateral interactions, consequently resulting in eccentricity effects as well as inter-observer variability. PMID:15820518

  5. [Genetics of amyotrophic lateral sclerosis].

    PubMed

    Corcia, Philippe; Blasco, Hélène; Camu, William

    2014-05-01

    Although the pathophysiology of amyotrophic lateral sclerosis remains currently unknown, involvement of genetic factors is worldwide accepted as a key clue in the motor neuron death. Since 1993 and the discovery of mutation in the SOD1 gene, number of genes linked to or promoting ALS had always growing. Among them, only four (SOD1, TARDBP, FUS and C9ORF72 genes) are unanimously recognized as convincing causative genetic factors for more than 60% of familial and probably 10% of sporadic ALS cases. Geographic origin of the studied populations tends to become one of the major items in the gene-ALS relationship: this was extremely stressed for C9ORF72. Concerning susceptibility genes factors, an increase of the risk of ALS is clearly shown for SMN1 and ATXN2 genes and accepted for some VEGF haplotypes. Finally, some modulating effects might also exist as underline for the relationships between ApoE and ALS that differ between European and North American studies. In inherited ALS, The European Federation of Neurological Societies (EFNS) edited rules that gave a legal frame to situations for which research of mutations were justified. Progress in the field of genetic raises major questions concerning the relevance of genetic studies from asymptomatic relatives. This first implies that the mutation identified in the proband case is perfectly characterized as a pathogenic mutation. PMID:24703222

  6. Lateral interface anisotropy in nanomagnets

    NASA Astrophysics Data System (ADS)

    Cowburn, R. P.; Koltsov, D. K.; Adeyeye, A. O.; Welland, M. E.

    2000-05-01

    The results are presented of a study into the magnetic properties of deep submicron elliptical nanomagnets. Small arrays of 2:1 aspect ratio ellipses of major axis size 500-100 nm and of thickness 5-10 nm have been fabricated out of supermalloy. A high sensitivity magneto-optical method has then been used to measure the hysteresis loops of each array. From these measurements the effective shape anisotropy in the elongated elements can be accurately determined. The measured shape anisotropy is found to be significantly smaller (approximately 50%) than that which would be expected from standard magnetostatic calculations. It is shown experimentally and theoretically that lateral interface (i.e., edge) roughness of only a few nanometers, which is present in any real nanomagnet, leads to the appearance of a powerful anisotropy of magnetostatic origin which competes strongly with the in-plane shape anisotropy, thus accounting for the anomalously low experimental values. The significance of this for data stability in magnetic random access memory is discussed.

  7. Summary of lateral-control research

    NASA Technical Reports Server (NTRS)

    Toll, Thomas A

    1947-01-01

    A summary has been made of the available information on lateral control. A discussion is given of the criterions used in lateral-control specifications, of the factors involved in obtaining satisfactory lateral control, and of the methods employed in making lateral-control investigations in flight and in wind tunnels. The available data on conventional flap-type ailerons having various types of aerodynamic balance are presented in a form convenient for use in design. The characteristics of spoiler devices and booster mechanisms are discussed. The effects of Mach number, boundary layer, and distortion of the wing or of the lateral-control system are considered insofar as the available information permits. An example is included to illustrate the use of the design data. The limitations of the available information and some of the lateral-control problems that remain to be solved are indicated.

  8. Retroviruses and amyotrophic lateral sclerosis.

    PubMed

    Alfahad, Tariq; Nath, Avindra

    2013-08-01

    Amyotrophic lateral sclerosis (ALS) is a progressive, invariably fatal neurologic disorder resulting from upper and lower motor neuron degeneration, which typically develops during the sixth or seventh decade of life, and is diagnosed based on standard clinical criteria. Its underlying cause remains undetermined. The disease may occur with increased frequency within certain families, often in association with specific genomic mutations, while some sporadic cases have been linked to environmental toxins or trauma. Another possibility, first proposed in the 1970s, is that retroviruses play a role in pathogenesis. In this paper, we review the published literature for evidence that ALS is associated either with infection by an exogenous retrovirus or with the expression of human endogenous retroviral (HERV) sequences in cells of the central nervous system. A small percentage of persons infected with the human immunodeficiency virus-1 (HIV-1) or human T cell leukemia virus-1 (HTLV-1) develop ALS-like syndromes. While HTLV-1 associated ALS-like syndrome has several features that may distinguish it from classical ALS, HIV-infected patients may develop neurological manifestations that resemble classical ALS although it occurs at a younger age and they may show a dramatic improvement following the initiation of antiretroviral therapy. However, most patients with probable or definite ALS show no evidence of HIV-1 or HTLV-1 infection. In contrast, recent reports have shown a stronger association with HERV, as analysis of serum samples, and postmortem brain tissue from a number of patients with a classical ALS has revealed significantly increased expression of HERV-K, compared to controls. These findings suggest that endogenous retroviral elements are involved in the pathophysiology of ALS, but there is no evidence that they are the primary cause of the syndrome. PMID:23707220

  9. Retroviruses and amyotrophic lateral sclerosis

    PubMed Central

    Alfahad, Tariq; Nath, Avindra

    2013-01-01

    Amyotrophic lateral sclerosis (ALS) is a progressive, invariably fatal neurologic disorder resulting from upper and lower motor neuron degeneration, which typically develops during the sixth or seventh decade of life, and is diagnosed based on standard clinical criteria. Its underlying cause remains undetermined. The disease may occur with increased frequency within certain families, often in association with specific genomic mutations, while some sporadic cases have been linked to environmental toxins or trauma. Another possibility, first proposed in the 1970s, is that retroviruses play a role in pathogenesis. In this paper, we review the published literature for evidence that ALS is associated either with infection by an exogenous retrovirus or with the expression of human endogenous retroviral (HERV) sequences in cells of the central nervous system. A small percentage of persons infected with the human immunodeficiency virus-1 (HIV-1) or human T cell leukemia virus-1 (HTLV-1) develop ALS-like syndromes. While HTLV-1 associated ALS-like syndrome has several features that may distinguish it from classical ALS, HIV-infected patients may develop neurological manifestations that resemble classical ALS although it occurs at a younger age and they may show a dramatic improvement following the initiation of antiretroviral therapy. However, most patients with probable or definite ALS show no evidence of HIV-1 or HTLV-1 infection. In contrast, recent reports have shown a stronger association with HERV, as analysis of serum samples, and postmortem brain tissue from a number of patients with a classical ALS has revealed significantly increased expression of HERV-K, compared to controls. These findings suggest that endogenous retroviral elements are involved in the pathophysiology of ALS, but there is no evidence that they are the primary cause of the syndrome. PMID:23707220

  10. Absence of lateral palpebral raphe in Caucasians.

    PubMed

    Goold, Lucy; Kakizaki, Hirohiko; Malhotra, Raman; Selva, Dinesh

    2009-01-01

    Classical anatomical teaching reports the presence of the lateral palpebral raphe formed at the union in the preseptal and orbital parts of the orbicularis oculi muscle, or by the tendon adhering these to the underlying zygomatic bone. The lateral palpebral raphe has been shown to be absent in Asian cadavers. The current study uses both evidence from the anatomical dissection of five eyelids from three Caucasian cadavers, and histological assessment of the lateral canthus of 13 eyelids from seven Caucasian cadavers to illustrate the absence of the lateral palpebral raphe in Caucasian population. PMID:19684845

  11. Vehicle Lateral Control for Highway Automation

    Microsoft Academic Search

    Huei Peng; Masayoshi Tomizuka

    1990-01-01

    The objectives of lateral control for highway automation are to let vehicles track the center of a lane with small error and to maintain good ride quality under different vehicle speeds, loads, wind gust disturbances, and road conditions. In this paper, the lateral feedback and feedforward controllers are designed to satisfy these objectives by utilizing the frequency-shaped linear quadratic (FSLQ)

  12. Aeromonas hydrophila Lateral Flagellar Gene Transcriptional Hierarchy

    PubMed Central

    Wilhelms, Markus; Gonzalez, Victor; Merino, Susana

    2013-01-01

    Aeromonas hydrophila AH-3 lateral flagella are not assembled when bacteria grow in liquid media; however, lateral flagellar genes are transcribed. Our results indicate that A. hydrophila lateral flagellar genes are transcribed at three levels (class I to III genes) and share some similarities with, but have many important differences from, genes of Vibrio parahaemolyticus. A. hydrophila lateral flagellum class I gene transcription is ?70 dependent, which is consistent with the fact that lateral flagellum is constitutively transcribed, in contrast to the characteristics of V. parahaemolyticus. The fact that multiple genes are included in class I highlights that lateral flagellar genes are less hierarchically transcribed than polar flagellum genes. The A. hydrophila lafK-fliEJL gene cluster (where the subscript L distinguishes genes for lateral flagella from those for polar flagella) is exclusively from class I and is in V. parahaemolyticus class I and II. Furthermore, the A. hydrophila flgAMNL cluster is not transcribed from the ?54/LafK-dependent promoter and does not contain class II genes. Here, we propose a gene transcriptional hierarchy for the A. hydrophila lateral flagella. PMID:23335410

  13. Later Life: A Time to Learn

    ERIC Educational Resources Information Center

    Russell, Helen

    2008-01-01

    In this article, an emerging framework for investigating and interpreting the experiences of learning in later life is presented. This framework is contextualized by a study in which the lived experiences of later-life computer learners were investigated. Significant ontological and existential interpretations from the study provided insights into…

  14. Diagnosing Dyslexia: The Screening of Auditory Laterality.

    ERIC Educational Resources Information Center

    Johansen, Kjeld

    A study investigated whether a correlation exists between the degree and nature of left-brain laterality and specific reading and spelling difficulties. Subjects, 50 normal readers and 50 reading disabled persons native to the island of Bornholm, had their auditory laterality screened using pure-tone audiometry and dichotic listening. Results…

  15. 49 CFR 229.63 - Lateral motion.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...229.63 Lateral motion. (a) Except as provided in paragraph (b), the total uncontrolled lateral motion between the hubs of the wheels and boxes, between boxes and pedestals or both, on any pair of wheels may not exceed 1 inch on...

  16. Is the Lateral Lymph Node Compartment Relevant?

    Microsoft Academic Search

    Moritz Koch; Peter Kienle; Dalibor Antolovic; Markus W. Büchler; Jürgen Weitz

    Lateral pelvic lymphadenectomy is routinely performed in advanced lower rectal cancers by Japanese surgeons, whereas in the western world it has not progressed to a frequently performed technique. Claimed benefit for this extensive surgery is an improved locoregional control; on the other hand, low positive lateral lymph node yields, questionable prognostic significance, and high morbidity (urinary and sexual dysfunction) are

  17. Does lateral gas diffusion in leaves matter?

    Microsoft Academic Search

    JAMES I. L. MORISON; TRACY LAWSON

    2007-01-01

    Photosynthesis depends on the diffusion of gaseous CO2 inside the leaf spaces from the stomatal entry point to the mesophyll cell walls. Although most research considers only the vertical diffusion from stomata on upper and\\/or leaf lower surfaces, some of the gas will diffuse in the lateral (paradermal) direction. The importance of lateral CO2 dif- fusion is reviewed, and the

  18. Task-specific initial impact phase adjustments in lateral jumps and lateral landings

    Microsoft Academic Search

    Jana Fleischmann; Dominic Gehring; Guillaume Mornieux; Albert Gollhofer

    Load-dependant adjustments in lateral jumps are thought to rely on foot placement and on upper leg’s kinematic and neuromuscular\\u000a adaptations. The aim of this study was to elucidate task-specific adjustments during the initial impact phase under varying\\u000a stretch-loads by the comparison of lateral jumps and lateral landings. Ten subjects performed lateral jumps and landings from\\u000a four distances. Electromyographic (EMG) data

  19. Vannevar Bush: Fifty Years Later

    NASA Astrophysics Data System (ADS)

    Lagowski, J. J.

    1995-12-01

    It is ironic that the 50th anniversary year of Vannevar Bush's Report to President Truman entitled "Science the Endless Frontier", which put into motion the eminently successful current system of education of scientists in this country occurs at a time when serious questions are being asked about the usefulness of that very system. Bush viewed his proposal to establish a national research foundation (later to be called the National Science Foundation) as a "social compact." Judgment of scientific merit would be delegated to expert peers in return for scientific progress, which would ultimately benefit the nation in terms of scientific needs--military security, economic productivity, and enhanced quality of life. Bush wanted the funding of basic research intertwined with training, and preferred to use universities for this purpose rather than industrial or national labs. Bush viewed college and university scientists as teachers and investigators. He believed university-based research would uniquely encourage and engage the next generation of scientists as no other institutional arrangement could. Bush did not trust industry's commitment to basic research, an instinct that proved prophetic. The academic reserve of scientists (PhD's in training and postdoctoral students) that existed before World War II, and upon which the United States could draw for its needs, which were primarily associated with defense efforts, was probably one of the defining factors in Bush's suggested strategy. Currently, that reserve of talent has gotten so large that it is the obvious throttle in the pipeline slowing the continued development of the university research enterprise. Since 1977, the rate at which we have trained new scientists exceeds an average of 4% annually. Since 1987, the "science work force"--PhD's--has grown at three times the rate of the general labor supply. Temporary positions for postdoctoral scientists have grown even faster (over 5% per year since 1989). To compound the problem, the 1990 Immigration Reform Act resulted in a tripling of job-based visas, with scientists representing nearly one-third of the total. In 1979, two of every three postdoctoral scientists were U.S.-born; in 1992, the ratio was about one to one. Over that period, the cohort of postdoctoral scientists grew from 18,000 to 33,000. Adding to the coincidence of events that have compounded one another is the admission of 20,000 Chinese scientists in a ten-year period, the sudden and unexpected availability of Russian scientists, the elimination of many industrial laboratories as a result of downsizing, changes in the mandatory retirement age for faculty, and the disappearance of the Cold War, which all but eliminated the need for scientists for national security purposes. Is it any wonder that postdoctoral scientists have been called the migrant workers of today's high-tech society? What once was a reservoir of enthusiastic talent is becoming a dumping ground for credentialed and capable scientists exiled from the main stream of their disciplines. From a broader point of view, the problems facing U.S. science are those of our society: an imposing deficit that is shrinking discretionary funding; the end of the Cold War, which has refocused spending for national security; and a robust science work force that can no longer expand. The business world's response to these societal problems is, basically, downsizing, which often means the elimination of large segments of the work force, usually at the middle-management level. The initial academic response to these same problems is either to insist on more resources being made available, usually through federal agencies, in an attempt to maintain the status quo, or to engage in some form of "academic birth control." The former strategy is unrealistic because it just perpetuates the problem; there will never be enough research professorships in the academic world for every aspiring PhD produced in a discipline. The latter strategy will invariably decrease the flow of truly n

  20. Lateralized suckling in domestic horses (Equus caballus).

    PubMed

    Komárková, Martina; Bartošová, Jitka

    2013-05-01

    Brain lateralization enables preferential processing of certain stimuli and more effective utilization of these stimuli in either the left or the right cerebral hemisphere. Horses show both motor and sensory lateralization patterns. Our aim was to determine whether a lateralized response could be detected in foals during the naturally side-biased behaviour, suckling. The foals' preferred suckling side could be the effect of either visual or motor lateralization. In the case of a visual lateralized response, foals are expected to suck more often from the mother's right side, so potential danger can be detected by the better adapted right hemisphere (i.e. left eye). Motor lateralization can be identified when a foal will suck predominantly from one side, either left or right. We found no population trend in the preferred suckling side, but we detected significant differences amongst individual foals. One-third (35.4 %) of 79 foals showed a strong, either right or left side preference which increased with age. The mothers did not influence the foals' suckling side preferences either by side-biased rejection or termination of suckling. According to our findings, a general pattern of sucking with the left eye open for better danger detection and recognition is unlikely in foals up to 7 months old. Foals of this age are probably young or fully focused on suckling and rely on their mothers' vigilance. Individual side preferences amongst foals are suggested to be based on motor lateralization. PMID:23117229

  1. Twenty years later Jean-Pierre Jouannaud

    E-print Network

    Jouannaud, Jean-Pierre

    Twenty years later Jean-Pierre Jouannaud LIX, ´Ecole Polytechnique 91400 Palaiseau, France Email: jouannaud@lix.polytechnique.fr http://www.lix.polytechnique.fr/Labo/jouannaud Abstract. The first RTA

  2. Pancreatic function in amyotrophic lateral sclerosis 1

    PubMed Central

    Utterback, Robert A.; Cummins, Alvin J.; Cape, Charles A.; Goldenberg, Julio

    1970-01-01

    No abnormality of exocrine function of the pancreas was found in 10 patients with amyotrophic lateral sclerosis. Eight patients showed abnormal glucose metabolism, attributed to the effects of age, malnutrition, diminished physical activity, and decreased muscle mass. PMID:5505684

  3. Lateral Transpsoas Fusion: Indications and Outcomes

    PubMed Central

    Patel, Vishal C.; Park, Daniel K.; Herkowitz, Harry N.

    2012-01-01

    Spinal fusion historically has been used extensively, and, recently, the lateral transpsoas approach to the thoracic and lumbar spine has become an increasingly common method to achieve fusion. Recent literature on this approach has elucidated its advantage over more traditional anterior and posterior approaches, which include a smaller tissue dissection, potentially lower blood loss, no need for an access surgeon, and a shorter hospital stay. Indications for the procedure have now expanded to include degenerative disc disease, spinal stenosis, degenerative scoliosis, nonunion, trauma, infection, and low-grade spondylolisthesis. Lateral interbody fusion has a similar if not lower rate of complications compared to traditional anterior and posterior approaches to interbody fusion. However, lateral interbody fusion has unique complications that include transient neurologic symptoms, motor deficits, and neural injuries that range from 1 to 60% in the literature. Additional studies are required to further evaluate and monitor the short- and long-term safety, efficacy, outcomes, and complications of lateral transpsoas procedures. PMID:23213303

  4. Managing Complications of Diabetes in Later Life

    MedlinePLUS

    ... previous page Related Topics Diabetes Related Documents PDF Living with Diabetes Download PDF Managing Complications of Diabetes in Later Life Download Join our e-newsletter! Resources Managing Complications ...

  5. Alcohol Problems in lAter life

    E-print Network

    Tullos, Desiree

    Alcohol Problems in lAter life A Pacific Northwest Extension Publication Oregon State University When alcohol use becomes a problem ................. 4 How an alcohol problem develops ....................... 6 Recognizing an alcohol problem .......................... 8 Guidelines for family and friends

  6. Temporal Integration in Nasal Lateralization of Ethanol

    Microsoft Academic Search

    Paul M. Wise; Thomas M. Canty; Charles J. Wysocki

    2006-01-01

    Two experiments examined the trade-off between concentration and stimulus duration in nasal lateralization of n-ethyl alcohol. In nasal lateralization, a common measure of irritation threshold, subjects receive chemical vapor in one nostril and clean air in the other. Subjects try to determine which nostril received the chemical. Within experimental runs, subjects received fixed concen- trations (1650-5000 ppm) of ethanol, and

  7. Lateral field emission diodes using SIMOX wafer

    Microsoft Academic Search

    Jung-Hyeon Park; Hyung-Il Lee; Heung-Sik Tae; Jeung-Soo Huh; Jung-Hee Lee

    1997-01-01

    Lateral field emission diodes were fabricated by using separation by implantation of oxygen (SIMOX) wafer and their current-voltage characteristics (I-V) were analyzed. Applying conventional photolithography and local oxidation of silicon (LOGOS) process, we fabricated single-crystalline lateral silicon field emitters with very sharp cathode and anode tips and very short cathode to anode spacing ranging from 0.3 to 0.8 ?m as

  8. Listeners' impressions of speakers with lateral lisps.

    PubMed

    Silverman, E M

    1976-11-01

    This paper reports research conducted to determine whether the lateral lisp is a speech defect. The specific purpose of this research was to determine whether the lateral lisp calls adverse attention to the speaker. Two groups of broadcast communication students rates the concept "The Person Speaking" on a 49-scale semantic differential. One group performed the task after listening to a tape recording of a young woman reading contextual material with a simulated lateral lisp. The other group performed the task after listening to a recording of the same woman reading the material in a normal manner. Analyses of the scale values computed for the two conditions indicated that the lateral lisp called adverse attention to the speaker. A systematic replication was undertaken to assess the generality of this finding. The procedures of the original investigation were followed except that business administration students served as judges. The results replicated those of the original investigation. These data indicate that the lateral lisp is probably a speech defect and suggest that the practice of eliminating school speech services for children whose only speech difference is a lateral lisp should be reconsidered. PMID:994486

  9. Lateral decubitus positioning stereotactic vacuum-assisted breast biopsy with true lateral mammography.

    PubMed

    Jung, Youn Joo; Bae, Young Tae; Lee, Jee Yeon; Seo, Hyung-Il; Kim, Jee Yeon; Choo, Ki Seok

    2011-03-01

    Stereotactic vacuum-assisted breast biopsy (VAB) has been used to evaluate microcalcifications or non-palpable breast lesions on mammography. Although stereotactic VAB is usually performed in a prone or upright position, an expensive prone table is necessary and vasovagal reactions often occur during the procedure. For these reasons, the lateral decubitus position can be applied for stereotactic VAB, and true lateral mammography can be used to detect the lesion. We report on 15 cases of lateral decubitus positioning for stereotactic VAB with true lateral mammography for non-palpable breast lesions or microcalcifications. The mean procedure time was approximately 30.1 minutes, and no complications occurred during the procedures. Fourteen cases had benign breast lesions and one case had a ductal carcinoma in situ. The lateral decubitus stereotactic VAB with true lateral mammography can be applied for microcalcifications or non-palpable breast lesions and helps to minimize anxiety and vasovagal reactions in patients. PMID:21847397

  10. Lateralization of cognitive processes in the brain.

    PubMed

    Hugdahl, K

    2000-12-01

    The lateralization of cognitive processes in the brain is discussed. The traditional view of a language-visuo/spatial dichotomy of function between the hemispheres has been replaced by more subtle distinctions. The use of magnetic resonance imaging (MRI) to study brain morphology has resulted in a renewed focus on the relationship between structural and functional asymmetry. Focus has been on the role played by the planum temporale area in the posterior part of the superior temporal gyrus for language asymmetry, and the possible significance of the larger left planum. The dichotic listening technique is used to illustrate the difference between bottom-up, or stimulus-driven laterality versus top-down, or instruction-driven laterality. It is suggested that the hemispheric dominance observed at any time is the sum result of the dynamic interaction between bottom-up and top-down processing tendencies. Stimulus-driven laterality dominance is always monitored and modulated through top-down cognitive processes, like shifting of attention and changes in arousal. A model of top-down modulation of bottom-up laterality is presented with special reference to the understanding of psychiatric disorders. PMID:11194413

  11. Spatial phase-shifting lateral shearing interferometer

    NASA Astrophysics Data System (ADS)

    Guo, Xiaoxian; Zeng, Aijun; Huang, Huijie

    2008-12-01

    The phase-shifting lateral shearing interferometer is widely adopted for wavefront measurement with high accuracy. For real-time wavefront measurement, a spatial phase-shifting lateral shearing interferometer is proposed. The interferometer includes a polarization lateral shearing module, a spatial phase-shifting module and an imaging module. The polarization lateral shearing module consists of a Savart polariscope. The spatial phase-shifting module is component of a non-polarization beam splitter, a polarization beam splitter, two rectangular prisms and a half wave-plate. The imaging module includes an imaging system and a CCD. The measured wavefront is sheared by the polarization lateral shearing module. The polarization directions of the two shearing beams are perpendicular to each other. The two shearing beams are split into four groups of beams by the spatial phase-shifting module to form four interferograms in a 2x2 matrix. The phase step of the four interferograms is 90 degrees. The four interferograms are captured in a single frame image by the imaging module. In experiments, a spherical wavefront with large radius of curvature was measured. Four spatial phase-shifting interferograms of the wavefront was obtained simultaneously. The usefulness of the interferometer is verified.

  12. Lateral restraint assembly for reactor core

    DOEpatents

    Gorholt, Wilhelm (San Diego, CA); Luci, Raymond K. (Del Mar, CA)

    1986-01-01

    A restraint assembly for use in restraining lateral movement of a reactor core relative to a reactor vessel wherein a plurality of restraint assemblies are interposed between the reactor core and the reactor vessel in circumferentially spaced relation about the core. Each lateral restraint assembly includes a face plate urged against the outer periphery of the core by a plurality of compression springs which enable radial preloading of outer reflector blocks about the core and resist low-level lateral motion of the core. A fixed radial key member cooperates with each face plate in a manner enabling vertical movement of the face plate relative to the key member but restraining movement of the face plate transverse to the key member in a plane transverse to the center axis of the core. In this manner, the key members which have their axes transverse to or subtending acute angles with the direction of a high energy force tending to move the core laterally relative to the reactor vessel restrain such lateral movement.

  13. Language lateralization shifts with learning by adults.

    PubMed

    Plante, Elena; Almryde, Kyle; Patterson, Dianne K; Vance, Christopher J; Asbjørnsen, Arve E

    2015-05-01

    For the majority of the population, language is a left-hemisphere lateralized function. During childhood, a pattern of increasing left lateralization for language has been described in brain imaging studies, suggesting that this trait develops. This development could reflect change due to brain maturation or change due to skill acquisition, given that children acquire and refine language skills as they mature. We test the possibility that skill acquisition, independent of age-associated maturation can result in shifts in language lateralization in classic language cortex. We imaged adults exposed to an unfamiliar language during three successive fMRI scans. Participants were then asked to identify specific words embedded in Norwegian sentences. Exposure to these sentences, relative to complex tones, resulted in consistent activation in the left and right superior temporal gyrus. Activation in this region became increasingly left-lateralized with repeated exposure to the unfamiliar language. These results demonstrate that shifts in lateralization can be produced in the short term within a learning context, independent of maturation. PMID:25285756

  14. Lateral unicompartmental replacement: a road less traveled.

    PubMed

    Scott, Richard D

    2005-09-01

    Lateral unicompartmental replacement is performed less frequently than medial replacement and is technically more difficult. The ratio of medial to lateral arthroplasties is approximately 10:1. Differences in technique include the following: The patella is more vulnerable to impingement on the leading edge of the femoral component and must be carefully recessed. Because the wear pattern in lateral disease is more posterior than in medial disease, there often is residual cartilage on the distal femoral condyle. This is also the case when UKA is performed for the sequella of a lateral plateau fracture. To avoid this impingement, residual cartilage should probably be removed from the distal condyle before its resection and the femoral component should be undersized anteriorly. Initial tibial resection should be very conservative to avoid the need for very thick tibial components to restore alignment and stability. Err toward shifting the femoral component laterally and the tibial component medially to maximize mediolateral congruency. Consider a medial parapatellar approach (avoiding the anterior horn of the medial meniscus) to facilitate visibility and component alignment. Avoid excessive posterior tibial slope. PMID:16190078

  15. Lateral stress evolution in Chromium Sulfide

    NASA Astrophysics Data System (ADS)

    Petel, Oren; Appleby-Thomas, Gareth; Hameed, Amer; Capozzi, Alexander; Frost, David; Hazell, Paul

    2013-06-01

    In this paper the shock response of chromium sulfide, a cermet of potential interest as a matrix material for ballistic applications, has been investigated. Compacts with a Chromium:Sulfur ratio of 1.15:1 were investigated via the plate-impact technique. These experiments allowed the material to be loaded under a one-dimensional state of strain. Embedded manganin stress gauges were employed to monitor the temporal evolution of longitudinal and lateral components of stress. Comparison of these two components has allowed assessment of the variation of material shear strength both with impact pressure/strain-rate and time. Interestingly tentative evidence of what appeared to be an elastic-plastic transition was noted on the lateral traces, despite the absence of a lateral shock.

  16. Lateral step initiation behavior in older adults.

    PubMed

    Sparto, Patrick J; Jennings, J Richard; Furman, Joseph M; Redfern, Mark S

    2014-02-01

    Older adults have varied postural responses during induced and voluntary lateral stepping. The purpose of the research was to quantify the occurrence of different stepping strategies during lateral step initiation in older adults and to relate the stepping responses to retrospective history of falls. Seventy community-ambulating older adults (mean age 76 y, range 70-94 y) performed voluntary lateral steps as quickly as possible to the right or left in response to a visual cue, in a blocked design. Vertical ground reaction forces were measured using a forceplate, and the number and latency of postural adjustments were quantified. Subjects were assigned to groups based on their stepping strategy. The frequency of trials with one or two postural adjustments was compared with data from 20 younger adults (mean age 38 y, range 21-58 y). Logistic regression was used to relate presence of a fall in the previous year with the number and latency of postural adjustments. In comparison with younger adults, who almost always demonstrated one postural adjustment when stepping laterally, older adults constituted a continuous distribution in the percentage of step trials made with one postural adjustment (from 0% to 100% of trials). Latencies of the initial postural adjustment and foot liftoff varied depending on the number of postural adjustments made. A history of falls was associated a larger percentage of two postural adjustments, and a longer latency of foot liftoff. In conclusion, the number and latency of postural adjustments made during voluntary lateral stepping provides additional evidence that lateral control of posture may be a critical indicator of aging. PMID:24295896

  17. Demonstration of the Lateral Casimir Force

    E-print Network

    F. Chen; U. Mohideen; G. L. Klimchitskaya; V. M. Mostepanenko

    2002-01-19

    The lateral Casimir force between a sinusoidally corrugated gold coated plate and large sphere was measured for surface separations between 0.2 $\\mu$m to 0.3 $\\mu$m using an atomic force microscope. The measured force shows the required periodicity corresponding to the corrugations. It also exhibits the necessary inverse fourth power distance dependence. The obtained results are shown to be in good agreement with a complete theory taking into account the imperfectness of the boundary metal. This demonstration opens new opportunities for the use of the Casimir effect for lateral translation in microelectromechanical systems.

  18. Biphasic cell responses on laterally mobile films

    NASA Astrophysics Data System (ADS)

    Kourouklis, Andreas; Lerum, Ronald; Bermudez, Harry

    2013-03-01

    The engineering of polymer surfaces or matrices that are capable of controlling cell adhesion has been widely explored. In nearly all of these works, the polymer chains (and ligands) are chemically attached to the underlying substrate, and therefore these systems are inherently static. By contrast, cellular environments such as the extracellular matrix (ECM) are dynamic and remodeled by biochemical reactions and biophysical forces. Borrowing this concept from Nature, we created polymer films by an interfacial self-assembly process, whereby individual chains can exhibit lateral mobility (in-plane diffusive motion). NIH 3T3 fibroblasts seeded on such RGD-presenting polymer films show biphasic responses in spreading and adhesion strength to lateral mobility, with a minimal response for intermediate mobility values. Futhermore, preliminary immuno-staining experiments reveal that the total area of focal adhesions demonstrates a similar biphasic trend to the cellular-scale behaviors. In contrast, actin filaments or stress fibers appear to be unaffected by the substrate lateral mobility. These results show that lateral mobility is an important, although not fully explored aspect of mechano-sensing by cells, and can potentially give new perspectives on cell-ECM interactions. The engineering of polymer surfaces or matrices that are capable of controlling cell adhesion has been widely explored. In nearly all of these works, the polymer chains (and ligands) are chemically attached to the underlying substrate, and therefore these systems are inherently static. By contrast, cellular environments such as the extracellular matrix (ECM) are dynamic and remodeled by biochemical reactions and biophysical forces. Borrowing this concept from Nature, we created polymer films by an interfacial self-assembly process, whereby individual chains can exhibit lateral mobility (in-plane diffusive motion). NIH 3T3 fibroblasts seeded on such RGD-presenting polymer films show biphasic responses in spreading and adhesion strength to lateral mobility, with a minimal response for intermediate mobility values. Futhermore, preliminary immuno-staining experiments reveal that the total area of focal adhesions demonstrates a similar biphasic trend to the cellular-scale behaviors. In contrast, actin filaments or stress fibers appear to be unaffected by the substrate lateral mobility. These results show that lateral mobility is an important, although not fully explored aspect of mechano-sensing by cells, and can potentially give new perspectives on cell-ECM interactions. National Science Foundation

  19. Becas para la realizacin de estudios universitarios durante el curso acadmico

    E-print Network

    Escolano, Francisco

    Becas para la realización de estudios universitarios durante el curso académico 2013-2014 en las primera vez. ¿Qué incluye la beca? Becas para la realización de estudios universitarios durante el curso Becas para la realización de estudios universitarios durante el curso académico 2013-2014 en las

  20. Microscopic histopathology of chronic refractory lateral epicondylitis

    Microsoft Academic Search

    William Regan; Lester E. Wold; Ralph Coonrad; Bernard F. Morrey

    1992-01-01

    The histopathologic features from 11 patients who were treated surgically for lateral epicondylitis were graded and compared to similar tissue from 12 cadaveric spec imens. All studies were done by a single pathologist who had no knowledge of the origin of the specimen. The surgical specimens were interpreted as abnormal in all 11 specimens, and all 12 of the control

  1. Later?life satisfaction: Does leisure contribute?

    Microsoft Academic Search

    John R. Kelly; Marjorie W. Steinkamp; Janice R. Kelly

    1987-01-01

    “Activity theories”; of aging as well as the common wisdom in recreation presume that greater activity leads to greater satisfaction with life in later years. Research, however, has produced conflicting results. Review and meta?analysis of previous research on the contribution of leisure and social activity to subjective well?being has produced a sequence of questions: (1) Do frequency and breadth of

  2. Lateral transmission system for buried instrumentation

    Microsoft Academic Search

    T. W. H. Caffey; D. E. Barnes; C. R. Nidever; J. E. Baughman

    1980-01-01

    A telemetry system that measures temperatures within a burning coal seam from beneath the seam is described. The temperature data are laterally transmitted through the earth to a receiver outside the high-temperature zone and then sent to the surface by wire. The system has a range of 46 m, battery capacity for 6-months operation, and performs 12 external measurements each

  3. Oxidative Pathology in Amyotrophic Lateral Sclerosis

    Microsoft Academic Search

    Robert H. Brown

    1. CLINICAL INTRODUCTION Amyotrophic lateral sclerosis (ALS) is a devastating neurological disease caused by death of motor neurons in the brain and spinal cord. Its essential clinical aspect is unrelenting paralysis that usually begins focally and then spreads. Most cases of ALS reveal evidence of concurrent corticospinal (upper) and spinal (lower) motor neuron death. The mean age of onset in

  4. Establishment of polarity in angiosperm lateral organs

    Microsoft Academic Search

    John L. Bowman; Yuval Eshed; Stuart F. Baum

    2002-01-01

    In seed plants, lateral organs such as leaves and floral organs are formed from the flanks of apical meristems. Therefore, they have an inherent positional relationship: organ primordia have an adaxial side next to the meristem, and an abaxial one away from the meristem. Surgical and genetic studies suggest that a morphogenetic gradient, which originates in the meristem, converts the

  5. Psychotherapists and the clergy: Fifty years later

    Microsoft Academic Search

    J. Marvin Spiegelman

    1984-01-01

    Jung's two powerful articles on psychotherapy and the clergy, written in 1928 and 1932. are looked at from the vantage point of fifty years later and the author's experience in conducting analysis with many people from both vocations. He notes that relatively few people achieve the kind of integration of the ego that Jung writes about-an essentially religious experience-wherein the

  6. Profiling 1366 Technologies: One Year Later

    SciTech Connect

    Van Mierlo, Frank; Sachs, Ely

    2011-01-01

    Last January, we took a look at how ARPA-E performer, 1366 Technologies is working to dramatically reduce the cost of solar energy. A year later, we revisited their headquarters in Lexington, MA to see the progress they've made.

  7. Control augmentation for lateral control wheel steering

    NASA Technical Reports Server (NTRS)

    Foulkes, R. H., Jr.

    1981-01-01

    Flight control system design for lateral control wheel steering is discussed. Two alternate designs are presented. The first design is a roll-rate command, bank-angle hold system with a wings-level track-hold submode. The second is a curved-track-hold system. Design details and real-time flight simulator results are included.

  8. Cooling Therapy Helps Newborns Years Later

    MedlinePLUS

    ... newborns on a special blanket with cool circulating water. The study showed that treated babies had a lower risk of death and disability nearly 2 years later. The therapy is now used in many neonatal intensive care units. In the new study, scientists looked to see if the benefits ...

  9. Motor laterality in 4 breeds of dog

    Microsoft Academic Search

    Paul D. McGreevy; Alex Brueckner; Peter C. Thomson; Nicholas J. Branson

    2010-01-01

    The aim of the current study was designed to explore possible breed differences in a basic behavioral phenotype in dogs. It measured paw use during food-retrieval from a cylindrical, hollow, rubber toy to assess motor laterality (pawedness) in 4 breeds of dogs selected for their morphological differences: 45 greyhounds (males n = 23\\/females n = 22), 47 whippets (15\\/32), 46

  10. F35% Revisited Ten Years Later

    Microsoft Academic Search

    William G. Clark

    2002-01-01

    This paper reviews the original derivation of the F35% (later F40%) harvest strategy, which consists of fishing at a rate that reduces spawning biomass per recruit to 35% (or 40%) of the unfished value, and investigates its applicability to long-lived stocks with low resiliency, such as some of the Pacific Coast rockfishes Sebastes spp. The life history parameters are unimportant

  11. Profiling 1366 Technologies: One Year Later

    ScienceCinema

    Van Mierlo, Frank; Sachs, Ely;

    2013-05-29

    Last January, we took a look at how ARPA-E performer, 1366 Technologies is working to dramatically reduce the cost of solar energy. A year later, we revisited their headquarters in Lexington, MA to see the progress they've made.

  12. Lateral capacity of helical piles in clays

    SciTech Connect

    Prasad, Y.V.S.N. [Memorial Univ. of Newfoundland, St. John`s, Newfoundland (Canada). Faculty of Engineering and Applied Science] [Memorial Univ. of Newfoundland, St. John`s, Newfoundland (Canada). Faculty of Engineering and Applied Science

    1996-11-01

    Helical piles, also known as screw anchors, consist of one or more helical-shaped circular plates welded to a central steel shaft at a specified spacing. Currently, helical piles are being used as tower foundations on land and in offshore areas to secure moorings, cables, and sea-bed pipelines to the sea bed. In this paper, the behavior of helical piles under lateral loads in clayey soils is examined through an experimental investigation on model piles. Tests were conducted on rigid helical piles with different numbers of plates. Model anchors were made of 13.8 mm diameter mild steel shafts to which mild steel plates of 33 mm diameter were welded. For comparison, a single straight shaft with a diameter of 13.8 mm was also tested. Test results revealed that the lateral capacity of helical piles is greater than that of straight shaft piles. A simple theoretical model is suggested to estimate the lateral capacity of rigid helical piles. The theoretical model suggested incorporates lateral resistance of the soil on the shaft, bearing resistance on the bottom of the helical plate, uplift resistance on the top of the helical plate, and frictional resistance on the surface of the helical plate. The validity of this model is examined.

  13. Artificial lateral line design for robotic fish

    Microsoft Academic Search

    Tsung-Ying Hsieh; Sheng-Wei Huang; Ling-Ji Mu; Edward Chen; Jenhwa Guo

    2011-01-01

    Fishes can avoid colliding with obstacles and track baits depending on the lateral distributed sense nodes which can sense the pressure variances of the surrounding flow field. Moreover, the interacted acoustic pressure field between the tail and the wall can provide useful information of the fish location by extracting the physical meaning of the sense node's measurement. Therefore, this study

  14. Stem cell treatment in Amyotrophic Lateral Sclerosis

    Microsoft Academic Search

    Letizia Mazzini; Katia Mareschi; Ivana Ferrero; Elena Vassallo; Giuseppe Oliveri; Nicola Nasuelli; Gaia Donata Oggioni; Lucia Testa; Franca Fagioli

    2007-01-01

    Amyotrophic Lateral Sclerosis is a progressive fatal neurodegenerative disease that targets motor neurons. Its origin is unknown but a main role of reactive astrogliosis and microglia activation in the pathogenesis has been recently demonstrated. Surrounding neurons with healthy adjoining cells completely stops motor neuron death in some cases. Hence stem cell transplantation might represent a promising therapeutic strategy. In this

  15. Simulation of lateral flow with SWAT

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Calibration of the SWAT model for the Goodwater Creek Experimental Watershed (GCEW) showed that percolation through the restrictive claypan layer, lateral flow above that layer, and redistribution of excess moisture up to the ground surface were not correctly simulated. In addition, surface runoff a...

  16. CORTICAL CELL DEATH DURING LATERAL ROOT FORMATION

    Microsoft Academic Search

    HOWARD T. BONNETT

    1969-01-01

    Root segments of Convolvulus arvensis, the field bindweed, were examined with the electron microscope to make possible a description of the fine structural correlates of lateral root protrusion through cortical parenchyma. Particular attention was directed to the outermost primordium cells, derived by meristematic activity from the endodermis, and to the con- tiguous cortical parenchyma cells. By following the fate of

  17. Lateral Hip Pain in an Athletic Population

    PubMed Central

    Grumet, Robert C.; Frank, Rachel M.; Slabaugh, Mark A.; Virkus, Walter W.; Bush-Joseph, Charles A.; Nho, Shane J.

    2010-01-01

    Context: Historically, the term greater trochanteric pain syndrome has been used to describe a spectrum of conditions that cause lateral-sided hip pain, including greater trochanteric bursitis, snapping iliotibial band, and/or strains or tendinopathy of the abductor mechanism. Diagnosis of these conditions may be difficult because clinical presentations are variable and sometimes inconclusive. Especially difficult is differentiating intrinsic pain from pain referred to the greater trochanteric region. The purposes of this article are to review the relevant anatomy and pathophysiology of the lateral hip. Evidence Acquisition: Data were collected through a thorough review of the literature conducted through a MEDLINE search of all relevant papers between 1980 and January 2010. Results: Recent advances in imaging and an improved understanding of pathomechanics have helped to guide the evaluation, diagnosis, and appropriate treatment for patients presenting with lateral hip pain. Conclusion: Various diagnostic tools and treatment modalities can be used to effectively manage the athletic patient presenting with lateral hip pain. PMID:23015937

  18. Posterior Fossa Lateral Ependymoma in Childhood

    Microsoft Academic Search

    Mahmoud G. Nagib; Therese O’Fallon

    1996-01-01

    Over a period extending from 1984 to 1993, 16 children ranging in ages from 2 months to 12 years with posterior fossa ependymoma were treated. Four of these tumors were classified as lateral ependymomas because of their configuration and suspected site of origin. These 4 patients’ ages ranged from

  19. One hand clapping: lateralization of motor control

    PubMed Central

    Welniarz, Quentin; Dusart, Isabelle; Gallea, Cécile; Roze, Emmanuel

    2015-01-01

    Lateralization of motor control refers to the ability to produce pure unilateral or asymmetric movements. It is required for a variety of coordinated activities, including skilled bimanual tasks and locomotion. Here we discuss the neuroanatomical substrates and pathophysiological underpinnings of lateralized motor outputs. Significant breakthroughs have been made in the past few years by studying the two known conditions characterized by the inability to properly produce unilateral or asymmetric movements, namely human patients with congenital “mirror movements” and model rodents with a “hopping gait”. Whereas mirror movements are associated with altered interhemispheric connectivity and abnormal corticospinal projections, abnormal spinal cord interneurons trajectory is responsible for the “hopping gait”. Proper commissural axon guidance is a critical requirement for these mechanisms. Interestingly, the analysis of these two conditions reveals that the production of asymmetric movements involves similar anatomical and functional requirements but in two different structures: (i) lateralized activation of the brain or spinal cord through contralateral silencing by cross-midline inhibition; and (ii) unilateral transmission of this activation, resulting in lateralized motor output.

  20. Is migraine a lateralization defect? Jani Kaaroa

    E-print Network

    Hadjikhani, Nouchine

    .We measured the absolute displacement of a midline structure, the pineal gland, on brain scans of 39 migraineurs and 26 controls. We found a signi¢cant asymmetry of the pineal gland in migraineurs compared, lateralization, migraine, pineal gland, serotonin Introduction Migraine is a disabling neurological disease

  1. Measuring acetabular component position on lateral radiographs - ischio-lateral method.

    PubMed

    Pulos, Nicholas; Tiberi Iii, John V; Schmalzried, Thomas P

    2011-01-01

    The standard method for the evaluation of arthritis and postoperative assessment of arthroplasty treatment is observation and measurement from plain films, using the flm edge for orientation. A more recent employment of an anatomical landmark, the ischial tuberosity, has come into use as orientation for evaluation and is called the ischio-lateral method. In this study, the use of this method was evaluated as a first report to the literature on acetabular component measurement using a skeletal reference with lateral radiographs. Postoperative radiographs of 52 hips, with at least three true lateral radiographs taken at different time periods, were analyzed. Component position was measured with the historical method (using the flm edge for orientation) and with the new method using the ischio-lateral method. The mean standard deviation (SD) for the historical approach was 3.7° and for the ischio-lateral method, 2.2° (p < 0.001). With the historical method, 19 (36.5%) hips had a SD greater than ± 4°, compared to six hips (11.5%) with the ischio-lateral method. By using a skeletal reference, the ischio-lateral method provides a more consistent measurement of acetabular component position. The high intra-class correlation coefficients for both intra- and inter-observer reliability indicate that the angle measured with this simple method, which employs no further technology, increased time, or cost, is consistent and reproducible for multiple observers. PMID:22035491

  2. White matter alterations differ in primary lateral sclerosis and amyotrophic lateral sclerosis

    PubMed Central

    Iwata, Nobue K.; Kwan, Justin Y.; Danielian, Laura E.; Butman, John A.; Tovar-Moll, Fernanda; Bayat, Elham

    2011-01-01

    Primary lateral sclerosis is a sporadic disorder characterized by slowly progressive corticospinal dysfunction. Primary lateral sclerosis differs from amyotrophic lateral sclerosis by its lack of lower motor neuron signs and long survival. Few pathological studies have been carried out on patients with primary lateral sclerosis, and the relationship between primary lateral sclerosis and amyotrophic lateral sclerosis remains uncertain. To detect in vivo structural differences between the two disorders, diffusion tensor imaging of white matter tracts was carried out in 19 patients with primary lateral sclerosis, 18 patients with amyotrophic lateral sclerosis and 19 age-matched controls. Fibre tracking was used to reconstruct the intracranial portion of the corticospinal tract and three regions of the corpus callosum: the genu, splenium and callosal fibres connecting the motor cortices. Both patient groups had reduced fractional anisotropy, a measure associated with axonal organization, and increased mean diffusivity of the reconstructed corticospinal and callosal motor fibres compared with controls, without changes in the genu or splenium. Voxelwise comparison of the whole brain white matter using tract-based spatial statistics confirmed the differences between patients and controls in the diffusion properties of the corticospinal tracts and motor fibres of the callosum. This analysis further revealed differences in the regional distribution of white matter alterations between the patient groups. In patients with amyotrophic lateral sclerosis, the greatest reduction in fractional anisotropy occurred in the distal portions of the intracranial corticospinal tract, consistent with a distal axonal degeneration. In patients with primary lateral sclerosis, the greatest loss of fractional anisotropy and mean diffusivity occurred in the subcortical white matter underlying the motor cortex, with reduced volume, suggesting tissue loss. Clinical measures of upper motor neuron dysfunction correlated with reductions in fractional anisotropy in the corticospinal tract in patients with amyotrophic lateral sclerosis and increased mean diffusivity and volume loss of the corticospinal tract in patients with primary lateral sclerosis. Changes in the diffusion properties of the motor fibres of the corpus callosum were strongly correlated with changes in corticospinal fibres in patients, but not in controls. These findings indicate that degeneration is not selective for corticospinal neurons, but affects callosal neurons within the motor cortex in motor neuron disorders. PMID:21798965

  3. An In Vitro Model to Investigate Filling of Lateral Canals

    Microsoft Academic Search

    Mauro Venturi; Carlo Prati; Lorenzo Breschi

    Aims of this work were to examine lateral canals in extracted teeth, to propose a new technique to produce artificial lateral canals, and to compare two obturation techniques. Cleared roots were examined to record measure and shape of lateral canals. Artificial lateral canals were prepared on human demineralized teeth before final clearing. Specimens were divided in two groups: canals of

  4. A rare nonincisional lateral abdominal wall hernia

    PubMed Central

    Kim, Dong-Ju

    2015-01-01

    A 68-year-old woman presented a rare lateral abdominal wall hernia. Three month before admission to Chungbuk National University Hospital, she found a large protruding mass measuring 8 cm in diameter in the midaxillary line just below the costal margin upon heavy coughing. She had no history of abdominal trauma, infection, or operation previously. The mass was easily reduced manually or by position change to left lateral decubitus. CT scan showed a defect of the right transversus abdominis muscle and internal oblique muscle at the right flank with omental herniation. Its location is different from that of spigelian hernia or lumbar hernia. The peritoneal lining of the hernia sac was smooth and there was no evidence of inflammation or adhesion. The hernia was successfully repaired laparoscopically using Parietex composite mesh with an intraperitoneal onlay mesh technique. The patient was discharged uneventfully and did not show any evidence of recurrence at follow-up visits. PMID:25692123

  5. Nanoparticle-based lateral flow biosensors.

    PubMed

    Quesada-González, Daniel; Merkoçi, Arben

    2015-11-15

    Lateral flow biosensors (LFBs) are paper-based devices which permit the performance of low-cost and fast diagnostics with good robustness, specificity, sensitivity and low limits of detection. The use of nanoparticles (NPs) as labels play an important role in the design and fabrication of a lateral flow strip (LFS). The choice of NPs and the corresponding detection method directly affect the performance of these devices. This review discusses aspects related to the application of different nanomaterials (e.g. gold nanoparticles, carbon nanotubes, quantum dots, up-converting phosphor technologies, and latex beads, between others) in LFBs. Moreover, different detection methods (colorimetric, fluorescent, electrochemical, magnetic, etc.) and signal enhancement strategies (affording secondary reactions or modifying the architecture of the LFS) as well as the use of devices such as smartphones to mediate the response of LFSs will be analyzed. PMID:26043315

  6. Establishment of polarity in angiosperm lateral organs.

    PubMed

    Bowman, John L; Eshed, Yuval; Baum, Stuart F

    2002-03-01

    In seed plants, lateral organs such as leaves and floral organs are formed from the flanks of apical meristems. Therefore, they have an inherent positional relationship: organ primordia have an adaxial side next to the meristem, and an abaxial one away from the meristem. Surgical and genetic studies suggest that a morphogenetic gradient, which originates in the meristem, converts the inherent polarity into a functional one. Once an adaxial-abaxial axis of polarity is established within organ primordia, it provides cues for proper lamina growth and asymmetrical development. Several key participants in this process have been identified, and analyses of these genes support and refine our views of axis formation in plants. The complex relationships between and within various members of these plant-specific gene families (class III HD-ZIPs, YABBYs and KANADIs) might account for a substantial part of the morphological variation in lateral organs of seed plants. PMID:11858837

  7. Polarization phase shifting lateral shearing interferometer

    NASA Astrophysics Data System (ADS)

    Liu, Lei; Zeng, Aijun; Zhu, Linglin; Song, Qiang; Huang, Huijie

    2013-08-01

    A polarization phase shifting lateral shearing interferometer based on a polarization beam splitting plate(PBSP) is proposed. The front surface of the PBSP is coated with polarization beam splitting film and its back surface is coated with total reflection film. The beam to be tested is split by the PBSP with an incidence angle of 45° and divided into two mutually perpendicular linearly polarization beams. Phase shifting can be introduced to the interferometer when the PBSP is combined with a polarzation temporal or spatial phase shifter. A polarizaiton temporal phase shifting lateral shearing interferometer system is built up both with the ASAP software and the experiments. The usefulness of the interferometer is verified.

  8. Mesoscopic Lateral Diffusion in Lipid Bilayers

    PubMed Central

    Ayton, Gary S.; Voth, Gregory A.

    2004-01-01

    The lateral diffusion in bilayers is modeled with a multiscale mesoscopic simulation. The methodology consists of two simulations, where the first employs atomistic models to obtain exact results for the mesoscopic model. The second simulation takes the results obtained from the first to parameterize an effective force field that is employed in a new coarse-grained model. The multiscale aspect of this scheme occurs at the point where the microscopic time-averaged results of the first simulation are employed to parameterize the second simulation that operates in a higher spatial and temporal domain. The results of both simulation schemes give quantitative information on the details associated with lipid lateral diffusion. PMID:15339807

  9. Lateral prefrontal cortex contributes to maladaptive decisions

    PubMed Central

    Xue, Gui; Juan, Chi-Hung; Chang, Chi-Fu; Lu, Zhong-Lin; Dong, Qi

    2012-01-01

    Humans consistently make suboptimal decisions involving random events, yet the underlying neural mechanisms remain elusive. Using functional MRI and a matching pennies game that captured subjects’ increasing tendency to predict the break of a streak as it continued [i.e., the “gambler's fallacy” (GF)], we found that a strong blood oxygen level-dependent response in the left lateral prefrontal cortex (LPFC) to the current outcome preceded the use of the GF strategy 10 s later. Furthermore, anodal transcranial direct current stimulation over the left LPFC, which enhances neuronal firing rates and cerebral excitability, increased the use of the GF strategy, and made the decisions more “sticky.” These results reveal a causal role of the LPFC in implementing suboptimal decision strategy guided by false world models, especially when such strategy requires great resources for cognitive control. PMID:22393013

  10. Robust lateral control of highway vehicles

    SciTech Connect

    Byrne, R.H. [Sandia National Labs., Albuquerque, NM (United States); Abdallah, C. [New Mexico Univ., Albuquerque, NM (United States). EECE Dept.

    1994-08-01

    Vehicle lateral dynamics are affected by vehicle mass, longitudinal velocity, vehicle inertia, and the cornering stiffness of the tires. All of these parameters are subject to variation, even over the course of a single trip. Therefore, a practical lateral control system must guarantee stability, and hopefully ride comfort, over a wide range of parameter changes. This paper describes a robust controller which theoretically guarantees stability over a wide range of parameter changes. The robust controller is designed using a frequency domain transfer function approach. An uncertainty band in the frequency domain is determined using simulations over the range of expected parameter variations. Based on this bound, a robust controller is designed by solving the Nevanlinna-Pick interpolation problem. The performance of the robust controller is then evaluated over the range of parameter variations through simulations.

  11. Lateral IMPATT diodes in standard CMOS technology

    Microsoft Academic Search

    T. Al-Attar; M. D. Mulligan; T. H. Lee

    2004-01-01

    We investigate the use of a lateral IMPATT diode built in 0.25?m CMOS technology as a high frequency power source. These diodes are monolithically integrated in coplanar waveguides and characterized by S-parameter measurements from 40 MHz to 110 GHz. These measurements show excellent agreement with predictions of theoretical models. To our knowledge, this is the first such structure built in

  12. Micromachining technology for lateral field emission devices

    Microsoft Academic Search

    Veljko Milanovic ´; Lance Doherty; Dana A. Teasdale; Siavash Parsa; Kristofer S. J. Pister

    2001-01-01

    We demonstrate a range of novel applications of micromachining and microelectromechanical systems (MEMS) for achieving efficient and tunable field emission devices (FEDs). Arrays of lateral field emission tips are fabricated with submicron spacing utilizing deep reactive ion etch (DRIE). Current densities above 150 A\\/cm2 are achieved with over 150·106 tips\\/cm2. With sacrificial sidewall spacing, electrodes can be placed at arbitrarily

  13. Kainji resettlement housing: 40 years later

    Microsoft Academic Search

    Ruth Shinenge Gyuse; Timothy Terver Gyuse

    2008-01-01

    Nigeria's Kainji Dam, completed in 1968, displaced 44,000 people from 239 settlements. Three housing forms were designed to provide for urban, semi?urban, and rural settings, respectively. Forty years later, the urban and semi?urban forms are integrated into the community while the rural form, modeled after a grain storage structure (rumbu) has been less successful. Five lessons are derived from this

  14. Lateral resolution of digital holographic system

    Microsoft Academic Search

    Huaying Wang; Hongjun Wei; Yi Wang; Jie Zhao; Dayong Wang

    2008-01-01

    Based on Fresnel diffraction theory, the point spread function (PSF) of the off-axis lensless Fourier transform digital holographic system with pre-magnification is deduced for the first time to the best of our knowledge. The limited lateral resolutions of the digital holographic systems with and without pre-magnification are analyzed in detail. For lensless Fourier digital holography, the expression of the limit

  15. Unicompartmental knee arthroplasty for lateral gonarthrosis

    Microsoft Academic Search

    Toshihiro Ohdera; Junichi Tokunaga; Akira Kobayashi

    2001-01-01

    Thirty-eight lateral compartment arthroplasties were performed in 22 years. Eighteen joints in 17 patients with an average age of 64.5 years were evaluated with minimum 5-year follow-up. Using the Hospital for Special Surgery knee score, 16 of 18 joints had satisfactory results in terms of function and pain relief. The average preoperative alignment on standing was 14.9° of valgus angulation,

  16. F 35% Revisited Ten Years Later

    Microsoft Academic Search

    William G. Clark

    2002-01-01

    This paper reviews the original derivation of the F35% (later F40%) harvest strategy, which consists of fishing at a rate that reduces spawning biomass per recruit to 35% (or 40%) of the unfished value, and investigates its applicability to long-lived stocks with low resiliency, such as some of the Pacific Coast rockfishesSebastes spp. The life history parameters are unimportant (at

  17. Palliative care in amyotrophic lateral sclerosis

    Microsoft Academic Search

    Gian Domenico Borasio; Raymond Voltz

    1997-01-01

    The poor prognosis of amyotrophic lateral sclerosis (ALS) makes palliative care a challenge for the neurologist. Most disabilities\\u000a associated with progressive disease can be ameliorated by symptomatic treatment. Prognosis and treatment options should be\\u000a openly discussed with the patient and his\\/her relatives. Nutritional deficiency due to pronounced dysphagia can be efficiently\\u000a relieved by a percutaneous enterogastrostomy. Respiratory insufficiency can be

  18. Quantifiable Lateral Flow Assay Test Strips

    NASA Technical Reports Server (NTRS)

    2003-01-01

    As easy to read as a home pregnancy test, three Quantifiable Lateral Flow Assay (QLFA) strips used to test water for E. coli show different results. The brightly glowing control line on the far right of each strip indicates that all three tests ran successfully. But the glowing test line on the middle left and bottom strips reveal their samples were contaminated with E. coli bacteria at two different concentrations. The color intensity correlates with concentration of contamination.

  19. Lateral Spine Densitometry in Obese Women

    Microsoft Academic Search

    E. R. Brooks; D. Heltz; P. Wozniak; C. Partington; J. C. Lovejoy

    1998-01-01

    .   The lateral (LAT) spine scan has been suggested as a more sensitive measure than posterior-anterior (PA) scanning for assessing\\u000a age-related bone loss in normal-weight postmenopausal women. The measurement error of PA and LAT bone mineral density (BMD)\\u000a using dual energy X-ray absorptiometry (DXA) has also been shown to rise with incremental increases in fat and from large\\u000a variance in

  20. Lateral jet injection into typical combustor flowfields

    NASA Technical Reports Server (NTRS)

    Lilley, D. G.

    1986-01-01

    The experimental problem of lateral jet injection into typical flow fields in the absence of combustion was studied. All flow fields being investigated have no expansion of the crossflow (the test section to swirler diameter ratio D/d = 1), after its passage through an optional swirler (with swirl vane angle phi = 0 (swirler removed), 45, and 70 degree). The lateral jet(s) is(are) located one test-section diameter downstream of the test-section inlet (x/D = 1). The lateral jets have round-sectioned nozzles, each of which has an area of 1/100th of the cross sectional area of the crossflow (A sub j/A sub c = 1/100). Jet-to-crossflow velocity ratios of R = v sub j/u sub o = 2, 4, and 6 were investigated. Helium-bubble low visualization, five-hole pitot probe time-mean velocity measurements, and single-wire time-mean velocity and normal and shear stress turbulence data were obtained in the research program.

  1. Lateral thermal damage along pulsed laser incisions.

    PubMed

    Zweig, A D; Meierhofer, B; Müller, O M; Mischler, C; Romano, V; Frenz, M; Weber, H P

    1990-01-01

    The damage adjacent to incisions created in dorsal mouse skin by overlapping Er3+ and CO2 laser pulses of a duration of 250 microseconds is investigated histologically. It is compared to injuries induced by long-term heating. We demonstrate how the lateral thermal damage near the laser cuts can be explained by heat conduction. We show that it is necessary to introduce as a heat reservoir a layer of tissue that has been liquified during the cutting process. The width of the thermally damaged region depends mainly on the extension of the liquid material that remains in the cut after the laser-tissue interaction. PMID:2345475

  2. Psychotherapists and the clergy: Fifty years later.

    PubMed

    Spiegelman, J M

    1984-03-01

    Jung's two powerful articles on psychotherapy and the clergy, written in 1928 and 1932. are looked at from the vantage point of fifty years later and the author's experience in conducting analysis with many people from both vocations. He notes that relatively few people achieve the kind of integration of the ego that Jung writes about-an essentially religious experience-wherein the center of their existence now gravitates about the Self. Yet Jung's work and views have had a profound effect on spiritually inclined people of all ages. The predictions of Jung's articles, regarding therapy, the dissemination of pyschology to the masses, and other issues are examined. PMID:24306937

  3. Responsiveness-to-Intervention: A Decade Later

    PubMed Central

    Fuchs, Lynn S.; Vaughn, Sharon

    2012-01-01

    In this introduction to this special issue, “A Decade Later,” we provide an overview of the accomplishments as well as the persistent questions surrounding RTI. We organize this discussion within 3 categories: assessment, instruction, and policy. Within each of these sections, we also highlight how the articles in the present special issue expand upon the key issues. Developed initially for the early grades (kindergarten through third grade) and primarily in the area of reading, many-although not all-of these issues speak to the expansion of RTI to address a broader set of academic content areas and the full range of grade levels. PMID:22539056

  4. Towards reproducible, scalable lateral molecular electronic devices

    NASA Astrophysics Data System (ADS)

    Durkan, Colm; Zhang, Qian

    2014-08-01

    An approach to reproducibly fabricate molecular electronic devices is presented. Lateral nanometer-scale gaps with high yield are formed in Au/Pd nanowires by a combination of electromigration and Joule-heating-induced thermomechanical stress. The resulting nanogap devices are used to measure the electrical properties of small numbers of two different molecular species with different end-groups, namely 1,4-butane dithiol and 1,5-diamino-2-methylpentane. Fluctuations in the current reveal that in the case of the dithiol molecule devices, individual molecules conduct intermittently, with the fluctuations becoming more pronounced at larger biases.

  5. Uniform lateral load capacity of infilled frames

    SciTech Connect

    Flanagan, R.D. [Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States). Engineering Division; Bennett, R.M. [Tennessee Univ., Knoxville, TN (United States). Dept. of Civil Engineering

    1993-11-11

    Three tests were conducted on 2.4 meter by 2.4 meter steel frames infilled with structural clay tile to determine the behavior and capacity when subjected to uniform lateral loads. An air bag was used to apply the out-of-plane loads. The walls were subjected to increasing load-unload cycles until virtual destruction of the infill. Cracking in the mortar joints occurred early in the tests, and then the primary load resisting mechanism was arching of the infilled panel. Typically, vertical arching occurred until failure of the top and bottom course tiles. Following failure of these courses, horizontal arching developed enabling the walls to maintain stability.

  6. Photolithography using lateral surface of nanofibers

    NASA Astrophysics Data System (ADS)

    Wei, Zhen; Bai, Jian; Wang, Chen; Hu, Neibin; Xu, Jianfeng; Yao, Yuan; Liang, Yiyong; Wang, Kaiwei; Hou, Changlun; Yang, Guoguang

    2015-05-01

    To enhance the resolution of photolithography, we demonstrate a technique that confines the exposure area by using lateral surface of nanofibers. Due to evanescent wave and optical tunneling effect, the interaction area of optical energy and the photoresist layer is confined into sub-wavelength dimension. Illuminated by a He-Cd laser device with a 442 nm wavelength, exposed lines with sub-wavelength width were obtained by using a nanofiber with a 247 nm diameter. Furthermore, curve lines and annular lines were obtained by manipulating the shape of nanofibers on the photoresist layer.

  7. Subtle retinal pathology in amyotrophic lateral sclerosis

    PubMed Central

    Ringelstein, Marius; Albrecht, Philipp; Südmeyer, Martin; Harmel, Jens; Müller, Ann-Kristin; Keser, Nazmiye; Finis, David; Ferrea, Stefano; Guthoff, Rainer; Schnitzler, Alfons; Hartung, Hans-Peter; Methner, Axel; Aktas, Orhan

    2014-01-01

    Amyotrophic lateral sclerosis (ALS) is characterized by neuro-ophthalmological abnormalities beyond disturbed oculomotor control such as decreased visual acuity and disturbed visual evoked potentials. Here we report retinal alterations in a cohort of 24 patients with clinically definite (n = 20) or probable (n = 4) ALS as compared to matched controls. High-resolution spectral domain optical coherence tomography with retinal segmentation revealed a subtle reduction in the macular thickness and the retinal nerve fiber layer (RNFL) as well as a marked thinning of the inner nuclear layer (INL). Our data indicate an unprecedented retinal damage pattern and suggest neurodegeneration beyond the motor system in this disease. PMID:25590041

  8. Lateral stress evolution in Chromium Sulfide

    NASA Astrophysics Data System (ADS)

    Petel, O. E.; Appleby-Thomas, G. J.; Hameed, A.; Capozzi, A.; Goroshin, S.; Frost, D. L.; Hazell, P. J.

    2014-05-01

    In this paper the shock response of CrS, a cermet of potential interest as a matrix material for ballistic applications, has been investigated. Compacts with a Chromium: Sulfur ratio of 1.15:1 were investigated via the plate-impact technique. These experiments allowed the material to be loaded under a one-dimensional state of strain. Embedded manganin stress gauges were employed to monitor the temporal evolution of longitudinal and lateral components of stress. Comparison of these two components has allowed assessment of the variation of material shear strength both with impact pressure/strain-rate and time.

  9. Sonographic diagnosis of talar lateral process fracture.

    PubMed

    Copercini, Michele; Bonvin, Florent; Martinoli, Carlo; Bianchi, Stefano

    2003-06-01

    The frequency of fractures of the lateral process of the talus (LPT) has markedly increased because of the expansion of snowboard activity. These lesions are difficult to diagnose, because they have aspecific signs, and standard radiographs do not show the fractures in 50% of cases. Sonography is used more and more in the assessment of ankle trauma, but it is rarely performed for detection of bone fractures. We report a case of a patient in which sonography directly showed an LPT fracture. PMID:12795560

  10. Lateral Pectoral Nerve Injury Mimicking Cervical Radiculopathy.

    PubMed

    Aktas, Ilknur; Palamar, Deniz; Akgun, Kenan

    2015-07-01

    The lateral pectoral nerve (LPN) is commonly injured along with the brachial plexus, but its isolated lesions are rare. Here, we present a case of an isolated LPN lesion confused with cervical radiculopathy. A 41-year-old man was admitted to our clinic because of weakness in his right arm. Previous magnetic resonance imaging (MRI) examination revealed right posterolateral protrusion at the C6-7 level. At the initial assessment, atrophy of the right pectoralis major muscle was evident, and mild weakness of the right shoulder adductor, internal rotator, and flexor muscles was observed. Therefore, electrodiagnostic evaluation was performed, and a diagnosis of isolated LPN injury was made. Nerve injury was thought to have been caused by weightlifting exercises and traction injury. Lateral pectoral nerve injury can mimic cervical radiculopathy, and MRI examination alone may lead to misdiagnosis. Repeated physical examinations during the evaluation and treatment phase will identify the muscle atrophy that occurs 1 or more months after the injury. PMID:25290103

  11. Religious Attendance and Loneliness in Later Life

    PubMed Central

    Rote, Sunshine; Hill, Terrence D.; Ellison, Christopher G.

    2013-01-01

    Purpose of the Study: ?Studies show that loneliness is a major risk factor for health issues in later life. Although research suggests that religious involvement can protect against loneliness, explanations for this general pattern are underdeveloped and undertested. In this paper, we propose and test a theoretical model, which suggests that social integration and social support are key mechanisms that link religious attendance and loneliness. Design and Methods: ?To formally test our theoretical model, we use data from the National Social Life Health and Aging Project (2005/2006), a large national probability sample of older adults aged 57–85 years. Results: ?We find that religious attendance is associated with higher levels of social integration and social support and that social integration and social support are associated with lower levels of loneliness. A series of mediation tests confirm our theoretical model. Implications: ?Taken together, our results suggest that involvement in religious institutions may protect against loneliness in later life by integrating older adults into larger and more supportive social networks. Future research should test whether these processes are valid across theoretically relevant subgroups. PMID:22555887

  12. Dual-domain lateral shearing interferometer

    DOEpatents

    Naulleau, Patrick P.; Goldberg, Kenneth Alan

    2004-03-16

    The phase-shifting point diffraction interferometer (PS/PDI) was developed to address the problem of at-wavelength metrology of extreme ultraviolet (EUV) optical systems. Although extremely accurate, the fact that the PS/PDI is limited to use with coherent EUV sources, such as undulator radiation, is a drawback for its widespread use. An alternative to the PS/PDI, with relaxed coherence requirements, is lateral shearing interferometry (LSI). The use of a cross-grating, carrier-frequency configuration to characterize a large-field 4.times.-reduction EUV lithography optic is demonstrated. The results obtained are directly compared with PS/PDI measurements. A defocused implementation of the lateral shearing interferometer in which an image-plane filter allows both phase-shifting and Fourier wavefront recovery. The two wavefront recovery methods can be combined in a dual-domain technique providing suppression of noise added by self-interference of high-frequency components in the test-optic wavefront.

  13. Prototype cantilevers for quantitative lateral force microscopy

    SciTech Connect

    Reitsma, Mark G.; Gates, Richard S.; Friedman, Lawrence H.; Cook, Robert F. [Nanomechanical Properties Group, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)

    2011-09-15

    Prototype cantilevers are presented that enable quantitative surface force measurements using contact-mode atomic force microscopy (AFM). The ''hammerhead'' cantilevers facilitate precise optical lever system calibrations for cantilever flexure and torsion, enabling quantifiable adhesion measurements and friction measurements by lateral force microscopy (LFM). Critically, a single hammerhead cantilever of known flexural stiffness and probe length dimension can be used to perform both a system calibration as well as surface force measurements in situ, which greatly increases force measurement precision and accuracy. During LFM calibration mode, a hammerhead cantilever allows an optical lever ''torque sensitivity'' to be generated for the quantification of LFM friction forces. Precise calibrations were performed on two different AFM instruments, in which torque sensitivity values were specified with sub-percent relative uncertainty. To examine the potential for accurate lateral force measurements using the prototype cantilevers, finite element analysis predicted measurement errors of a few percent or less, which could be reduced via refinement of calibration methodology or cantilever design. The cantilevers are compatible with commercial AFM instrumentation and can be used for other AFM techniques such as contact imaging and dynamic mode measurements.

  14. Lateral Distribution Functions of Extensive Air Showers

    NASA Astrophysics Data System (ADS)

    Geranios, A.; Fokitis, E.; Maltezos, S.; et al.

    The energy is among the characteristics of Ultra High Energy Cosmic Rays (E>5 x 1019 eV) which could be estimated experimentally. The following paper attempts to estimate the energy of an UHECR proton by applying a Monte Carlo simulation code. A number of extensive air showers, vertical and inclined, is simulated to derive the Lateral Distribution Functions of the shower muons. The scenario of simulations is adopted to the Cerenkov surface detector of the P. AUGER Observatory. Due to the fact that the Lateral Distribution Functions show minimal fluctuations of the muon density at a distance larger than 800 m from the core of the showers, and due to the fact that at a distance of 900 m the distribution functions for inclined showers coincide (which means that it does not change with the zenith angle of the showers), we select the muon density at 900 m to derive the energy of the primary protons. (The project is co-funded by the European Social Fund and National Resources (EPEAEK II) PYTHAGORAS II.)

  15. Captura de satélites durante a formação de Júpiter

    NASA Astrophysics Data System (ADS)

    Winter, O. C.; Vieira Neto, E.; Yokoyama, T.

    2003-08-01

    O planeta Jupiter apresenta um grande número de satélites irregulares. As características das órbitas destes objetos indicam que os mesmos não teriam se formado ao redor do planeta que se encontram. As teorias existentes são de que estes objetos teriam se formado em uma região distante do planeta e sua evolução dinâmica os teria levado a uma captura gravitacional pelo planeta. Tendo em vista que o processo de captura gravitacional sem efeitos dissipativos não produz uma captura permanente, estudamos o processo de captura durante o estágio de formação do planeta. Realizamos simulações numéricas para os casos de satélites prógrados e retrógrados que inicialmente se encontram ao redor de Jupiter com sua massa atual e então, evoluimos a integração voltando no tempo de modo que o planeta sofra uma redução em sua massa (de 100% para 10% de sua massa atual) e verificamos o instante em que o satélites escapa do planeta (quando sua energia do problema de dois corpos se torna positiva). Assim, analisando o problema inverso no tempo, obtivemos em qual estágio de formação de Jupiter aquele hipotético satélite teria sido capturado. Os resultados mostram que os satélites retrógrados são capturados assim que entram na região delimitada pela esfera de Hill do planeta, enquanto que os satélites prógrados só são capturados quando entram numa região bem mais próxima ao planeta, uma fração da esfera de Hill.

  16. Bioenergetic markers in skin fibroblasts of sporadic amyotrophic lateral sclerosis and progressive lateral sclerosis patients.

    PubMed

    Kirk, Kathryne; Gennings, Chris; Hupf, Jonathan C; Tadesse, Saba; D'Aurelio, Marilena; Kawamata, Hibiki; Valsecchi, Federica; Mitsumoto, Hiroshi; Manfredi, Giovanni

    2014-10-01

    Energy metabolism could influence amyotrophic lateral sclerosis (ALS) and progressive lateral sclerosis (PLS) pathogenesis and the response to therapy. We developed a novel assay to simultaneously assess mitochondrial content and membrane potential in patients' skin fibroblasts. In ALS and PLS fibroblasts, membrane potential was increased and mitochondrial content decreased, relative to healthy controls. In ALS higher mitochondrial membrane potential correlated with age at diagnosis, and in PLS it correlated with disease severity. These unprecedented findings in ALS and PLS fibroblasts could shed new light onto disease pathogenesis and help in developing biomarkers to predict disease evolution and the individual response to therapy in motor neuron diseases. PMID:25090982

  17. Macroscopic Lateral Heterogeneity Observed in a Laterally-Mobile Immiscible Mixed Polyelectrolyte/Neutral Polymer Brush

    PubMed Central

    Lee, Hoyoung; Tsouris, Vasilios; Lim, Yunho; Mustafa, Rafid; Choi, Je; Choi, Yun Hwa; Park, Hae-Woong; Meron, Mati; Lin, Binhua; Won, You-Yeon

    2015-01-01

    We studied mixed poly(ethylene oxide) (PEO) and poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brushes. The question we attempted to answer was: When the chain grafting points are laterally mobile, how will this lateral mobility influence the structure and phase behavior of the mixed brush? Three different model mixed PEO/PDMAEMA brush systems were prepared: (1) a laterally-mobile mixed brush by spreading onto the air-water interface a mixture of poly(ethylene oxide)-poly(n-butyl acrylate) (PEO-PnBA) and poly(2-(dimethylamino)ethyl methacrylate)-poly(n-butyl acrylate) (PDMAEMA-PnBA) diblock copolymers (the specific diblock copolymers used will be denoted as PEO113-PnBA100 and PDMAEMA118-PnBA100, where the subscripts refer to the number-average degrees of polymerization of the individual blocks), (2) a mobility-restricted (inseparable) version of the above mixed brush prepared using a PEO-PnBA-PDMAEMA triblock copolymer (denoted as PEO113-PnBA89-PDMAEMA120) having respective brush molecular weights matched to those of the diblock copolymers, and (3) a different laterally-mobile mixed PEO and PDMAEMA brush prepared from a PEO113-PnBA100 and PDMAEMA200-PnBA103 diblock copolymer combination, which represents a further more height-mismatched mixed brush situation than described in (1). These three mixed brush systems were investigated by surface pressure-area isotherm and X-ray (XR) reflectivity measurements. These experimental data were analyzed within the theoretical framework of a continuum self-consistent field (SCF) polymer brush model. The combined experimental and theoretical results suggest that the mobile mixed brush derived using the PEO113-PnBA100 and PDMAEMA118-PnBA100 combination (i.e., Mixed Brush System #1) undergoes a lateral macroscopic phase separation at high chain grafting densities, whereas the more height-mismatched system (System #3) is only microscopically phase separated under comparable brush density conditions even though the lateral mobility of the grafted chains is unrestricted. The macroscopic phase separation observed in the laterally-mobile mixed brush system is in contrast to the microphase separation behavior commonly observed in two-dimensional laterally-mobile charged small molecule mixtures. Further study is needed to determine the detailed morphologies of the macro and microphase-separated mixed PEO/PDMAEMA brushes. PMID:24695635

  18. Diagnosis and Treatment of Lateral Patellar Compression Syndrome

    PubMed Central

    Saper, Michael G.; Shneider, David A.

    2014-01-01

    Chronic anterior knee pain with a stable patella is often associated with overload and increased pressure on the lateral facet due to pathologic lateral soft-tissue restraints. “Lateral pressure in flexion” is a term describing the pathologic process of increasing contact pressure over the lateral patellar facet as knee flexion progresses. This report describes a surgical technique developed in response to lateral pressure in flexion and the shortcomings of traditional arthroscopic lateral release procedures. The technique is performed open with the knee in flexion, and the lateral release is repaired with a rotation flap of iliotibial band to close the defect and prevent patellar subluxation. The technique effectively decreases lateral patellar pressure and centers the patella correctly in the trochlear groove with minimal risk of iatrogenic patellar instability. PMID:25473620

  19. Lesional location of lateral medullary infarction presenting hiccups (singultus)

    PubMed Central

    Park, M; Kim, B; Koh, S; Park, M; Park, K; Lee, D

    2005-01-01

    Background: Hiccups are an infrequent result of lateral medullary infarction. Their importance may be underestimated and they can cause distress, exhaustion, and aspiration. Hiccups in lateral medullary infarction remain poorly understood Objective: To evaluate the relation between the lesional loci of lateral medullary infarction and hiccups. Methods: 51 patients with lateral medullary infarction were investigated by magnetic resonance imaging within three days of the onset of infarction. Seven of the 51 patients developed hiccup. Results: All patients with hiccups had middle level lateral medullary lesions, including two with lower level lesions and four with upper level lesions. In the middle level lateral medullary lesions, dorsolateral lesions were most often involved. All patients with lateral medullary infarction presenting with hiccups also had vertigo, dizziness, nausea, vomiting, and dysphagia. Conclusions: The observations suggest that middle level and dorsolateral lesion locations in lateral medullary infarction frequently induce hiccups. PMID:15608002

  20. 14 CFR 25.177 - Static lateral-directional stability.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...Aeronautics and Space 1 2010-01-01 2010-01-01 false Static lateral-directional stability. 25.177 Section 25...TRANSPORT CATEGORY AIRPLANES Flight Stability § 25.177 Static lateral-directional stability. (a)-(b)...

  1. Pseudoaneurysm of the lateral plantar artery after foot laceration

    Microsoft Academic Search

    Brian P. Thornton; David J. Minion; Rhonda Quick; Henry C. Vasconez; Eric D. Endean

    2003-01-01

    Two children with lateral plantar artery pseudoaneurysms are presented. Both cases were associated with a plantar laceration and were successfully treated with ligation. Only one other report of a lateral plantar artery pseudoaneurysm was found in the literature; no reports involving the medial plantar artery have been reported. A cadaver dissection supports the hypothesis that the lateral plantar artery is

  2. Lateralized eye use in Octopus vulgaris shows antisymmetrical distribution

    Microsoft Academic Search

    Ruth A. Byrne; Michael J. Kuba; Daniela V. Meisel

    2004-01-01

    Behavioural lateralization has been demonstrated in many species of vertebrates, but there has been scarce evidence for it in invertebrates. We have previously documented lateral asymmetry of eye use in individual octopuses. In the present study we investigated lateralization at the population level. Octopus eyes are on the sides of the head, and these animals prefer monocular to binocular vision.

  3. Effective use of botox for lateral canthal rhytids

    Microsoft Academic Search

    Alan Matarasso; Michael Glassman

    2001-01-01

    The authors discuss why Botox is their preferred nonsurgical treatment for lateral canthal rhytids, or crow's-feet. Three or 4 injections are spaced at 1.0- to 1.5-cm intervals beginning immediately beneath the lateral edge of the eyebrow and extending down to the lateral infraorbital rim. Complications are infrequent and can usually be avoided with the injection techniques described.

  4. 10 CFR 600.251 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Later disallowances and adjustments. 600...Post-Award Requirements § 600.251 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  5. 29 CFR 97.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 true Later disallowances and adjustments. 97...After-The-Grant Requirements § 97.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  6. 13 CFR 143.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Later disallowances and adjustments. 143...After-the-Grant Requirements § 143.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  7. 21 CFR 1403.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Later disallowances and adjustments. 1403...After-The-Grant Requirements § 1403.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  8. 32 CFR 33.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Later disallowances and adjustments. 33...After-The-Grant Requirements § 33.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  9. 29 CFR 1470.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Later disallowances and adjustments. 1470...After-The-Grant Requirements § 1470.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  10. 40 CFR 31.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Later disallowances and adjustments. 31...After-the-Grant Requirements § 31.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  11. 20 CFR 437.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Later disallowances and adjustments. 437...After-the-Grant Requirements § 437.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  12. 49 CFR 18.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Later disallowances and adjustments. 18...After-The-Grant Requirements § 18.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  13. 38 CFR 43.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Later disallowances and adjustments. 43...After-The-Grant Requirements § 43.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  14. 45 CFR 1157.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Later disallowances and adjustments. 1157...After-the-Grant Requirements § 1157.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  15. 34 CFR 80.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Later disallowances and adjustments. 80...After-the-Grant Requirements § 80.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  16. 41 CFR 105-71.151 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Later disallowances and adjustments. 105-71...15-After-the-Grant Requirements § 105-71.151 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  17. 45 CFR 602.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Later disallowances and adjustments. 602...After-the-Grant Requirements § 602.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  18. 22 CFR 135.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Later disallowances and adjustments. 135...After-The-Grant Requirements § 135.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  19. 14 CFR 1273.51 - Later disallowances and adjustments.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Later disallowances and adjustments. 1273...After-the-Grant Requirements § 1273.51 Later disallowances and adjustments. The...costs and recover funds on the basis of a later audit or other review; (b) The...

  20. Predicting Later-Life Outcomes of Early-Life Exposures

    EPA Science Inventory

    Background: In utero exposure of the fetus to a stressor can lead to disease in later life. Epigenetic mechanisms are likely mediators of later-life expression of early-life events.Objectives: We examined the current state of understanding of later-life diseases resulting from ea...

  1. The Lateral Dynamical Analysis of the Magnetic Levitation System

    Microsoft Academic Search

    Hongpo Wang; Jie Li; Kun Zhang

    2007-01-01

    The lateral dynamic character of the maglev system is investigated by constructing the model of it with the lateral tie. To analyze the relationship between vertical stability and lateral displacement of the electromagnet, the dynamic model is linearized at the equilibrium. Runge-Kutta numerical method is employed to obtain the numerical solution of the differential equations. The boundary curves are drawn,

  2. ELECTRICAL RESPONSES FROM LATERAL-LINE NERVES OF FISHES. III

    PubMed Central

    Hoagland, Hudson

    1933-01-01

    Evidence indicates that lateral-line fibers, other than those mediating the "spontaneous" activity of the lateral-line receptors, are brought into play in response to pressure stimuli in catfish and in trout. The distribution and mode of stimulation of mechanoreceptors along the lateral-lines of trout and catfish are discussed in relation to the natural activities of these forms. PMID:19872765

  3. Coverage of Exposed Bone of the Lateral Malleolus With a Proximally Based Lateral Malleolar Perforator Flap.

    PubMed

    van der Zee, Caroline W; Moerman, Esther; Haverlag, Robert; Schepers, Tim

    2015-01-01

    The treatment of soft tissue defects of the ankle, combined with an implant-related infection, remains a challenge. The present case report illustrates the use of a pedicled perforator flap for soft tissue reconstruction to cover a postoperative defect at the lateral malleolus after an ankle fracture. PMID:25154652

  4. Large-scale lateral nanowire arrays nanogenerators

    DOEpatents

    Wang, Zhong L; Xu, Chen; Qin, Yong; Zhu, Guang; Yang, Rusen; Hu, Youfan; Zhang, Yan

    2014-01-07

    In a method of making a generating device, a plurality of spaced apart elongated seen members are deposited onto a surface of a flexible non-conductive substrate. An elongated conductive layer is applied to a top surface and a first side of each seed member, thereby leaving an exposed second side opposite the first side. A plurality of elongated piezoelectric nanostructures is grown laterally from the second side of each seed layer. A second conductive material is deposited onto the substrate adjacent each elongated first conductive layer so as to be soupled the distal end of each of the plurality of elongated piezoelectric nanostructures. The second conductive material is selected so as to form a Schottky barrier between the second conductive material and the distal end of each of the plurality of elongated piezoelectric nanostructures and so as to form an electrical contact with the first conductive layer.

  5. [Dysphagia with lateral medullary infarction (Wallenberg's syndrome)].

    PubMed

    Oshima, Fumiko

    2011-11-01

    Dysphagia after lateral medullary infarction (LMI) is common. The dysphagia of LMI is dynamically characterized by a failure in triggering of the pharyngeal-phase swallowing movements, reduced output, and lack of coordination (swallowing pattern abnormality). Based on accurate evaluation, we can select suitable rehabilitative approaches for individual patients, including respiratory therapy, food modification, postural changes, and oral care. We focused on the absence of upper esophageal sphincter (UES) opening of the unaffected side of the medullae. The movement pattern was defined as failure of bolus passage through the intact side of the UES, occurring at least once during the videofluorographic evaluation of each individual. Three abnormal patterns of UES opening were classified. The passage pattern abnormality shows the failure of the stereotyped motor sequence. For severe cases, it is necessary to consider long-term treatment, including botulinum toxin injection or surgery to prevent aspiration and adequate nutritional management. PMID:22277480

  6. Genetics of amyotrophic lateral sclerosis: an update

    PubMed Central

    2013-01-01

    Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disorder involving both upper motor neurons (UMN) and lower motor neurons (LMN). Enormous research has been done in the past few decades in unveiling the genetics of ALS, successfully identifying at least fifteen candidate genes associated with familial and sporadic ALS. Numerous studies attempting to define the pathogenesis of ALS have identified several plausible determinants and molecular pathways leading to motor neuron degeneration, which include oxidative stress, glutamate excitotoxicity, apoptosis, abnormal neurofilament function, protein misfolding and subsequent aggregation, impairment of RNA processing, defects in axonal transport, changes in endosomal trafficking, increased inflammation, and mitochondrial dysfunction. This review is to update the recent discoveries in genetics of ALS, which may provide insight information to help us better understanding of the disease neuropathogenesis. PMID:23941283

  7. Catalytic antioxidants to treat amyotropic lateral sclerosis

    PubMed Central

    Crow, John P

    2010-01-01

    Catalytic antioxidants are comprised of specialised classes of organometallic complexes that can catalyse the decomposition of injurious biological oxidants. These complexes have been shown to prevent the formation of several oxidative markers in spinal cord of G93A amyotropic lateral sclerosis mice and markedly extend survival, even when administered at symptom onset; however, it is now clear that some complexes lacking in antioxidant activity are also protective. New proteomics data suggest that these complexes also induce a broad spectrum of endogenous cellular defense mechanisms. The combination of antioxidant and adaptive resistance effects may explain the remarkable potency of these compounds and may also suggest wide applicability for them in a number of neurodegenerative diseases. PMID:17040198

  8. Analysis of flexible structures under lateral impact

    SciTech Connect

    Ramirez, D. F. [Paul C. Kizzo and Associates Inc., Seismic Structural Group, Oakland, CA 94612 (United States); Razavi, H. [AREVA Inc., Civil Seismic Group, San Jose, CA 95119 (United States)

    2012-07-01

    Three methods for analysis of flexible structures under lateral impact are presented. The first proposed method (Method A) consists of: (1) modifying an available deceleration on a rigid target with conservation principles to account for structural flexibility; and (2) transient nonlinear analysis of the structure with the corrected forcing function. The second proposed method (Method B) is similar to Method A in obtaining the forcing function but it solves the equations of motion of an idealized two-degree-of-freedom system instead of directly using conservation principles. The last method simply provides the maximum force in the structure using the conservation of energy and linear momentum. A coupled simulation is also performed in LS-DYNA and compared against the proposed methods. A case study is presented to illustrate the applicability of all three methods and the LS-DYNA simulation. (authors)

  9. [An unusual lateral cervico-facial fistula].

    PubMed

    Skevas, A; Bliouras, K; Papadopoulos, N; Tsoulias, T

    1989-08-01

    Lateral cervical sinuses of fistula are usually derivatives of the branchial clefts and pouches and have a more or less typical course in the neck. We present a patient with an extremely long sinus extending from the left supraclavicular area, via the cheek up to the left infraorbital rim. We could not find a similar report in literature. The diagnostic evaluation as well as the successful surgical removal of the malformation through a skin incision in the neck and a second incision in the sulcus gingivobucalis are described. On the basis of a brief review in the embryology of the congenital anomalies of the neck and face some considerations about the possible origin of the cervico-facial sinuses are discussed. PMID:2789577

  10. Nanoindentation of laterally overgrown epitaxial gallium nitride

    NASA Astrophysics Data System (ADS)

    Martyniuk, M.; Parish, G.; Marchand, H.; Fini, P. T.; DenBaars, S. P.; Faraone, L.

    2012-04-01

    Nanoindentation has been used to investigate and compare the mechanical properties of GaN grown by the lateral epitaxial overgrowth (LEO) method and the defective seed region prepared by metalorganic chemical vapour deposition. Common modulus of elasticity values (˜230 GPa) and hardness values (˜19 GPa) were found for both materials. The GaN response to nanoindentation was found to be purely elastic for low indentation loads with the onset of plasticity being marked by discontinuities or "pop-in" events in the indenter load-penetration curves. The maximum shear stress under the indenter at pop-in events for LEO GaN corresponds well with the critical shear stress necessary for homogeneous dislocation nucleation, indicating that the defects in this region are too sparse and do not aid in dislocation nucleation.

  11. ARTE ACTIVISTA EN BRASIL DURANTE EL AI-5 (1968-1979) Mara IIGO

    E-print Network

    Paris-Sud XI, Université de

    1 ARTE ACTIVISTA EN BRASIL DURANTE EL AI-5 (1968-1979) Yayo AZNAR María IÑIGO Universidad Nacional obras de arte producidas en Brasil durante el AI-5, el Estado de Excepción que se extendió desde 1968 trabajados toman posición crítica a través de sus obras. Palabras clave: Brasil, Arte, Dictadura, Represión

  12. Surgical endodontic management of infected lateral canals of maxillary incisors

    PubMed Central

    2015-01-01

    This case report presents surgical endodontic management outcomes of maxillary incisors that were infected via the lateral canals. Two cases are presented in which endodontically-treated maxillary central incisors had sustained lateral canal infections. A surgical endodontic treatment was performed on both teeth. Flap elevation revealed vertical bone destruction along the root surface and infected lateral canals, and microscopy revealed that the lateral canals were the origin of the lesions. After the infected lateral canals were surgically managed, both teeth were asymptomatic and labial fistulas were resolved. There were no clinical or radiographic signs of surgical endodontic management failure at follow-up visits. This case report highlights the clinical significance and surgical endodontic management of infected lateral canal of maxillary incisor. It is important to be aware of root canal anatomy variability in maxillary incisors. Maxillary central incisors infected via the lateral canal can be successfully managed by surgical endodontic treatment. PMID:25671217

  13. Does cerebral lateralization develop? A study using functional transcranial Doppler ultrasound assessing lateralization for language production and visuospatial memory

    PubMed Central

    Groen, Margriet A; Whitehouse, Andrew J O; Badcock, Nicholas A; Bishop, Dorothy V M

    2012-01-01

    In the majority of people, language production is lateralized to the left cerebral hemisphere and visuospatial skills to the right. However, questions remain as to when, how, and why humans arrive at this division of labor. In this study, we assessed cerebral lateralization for language production and for visuospatial memory using functional transcranial Doppler ultrasound in a group of 60 typically developing children between the ages of six and 16 years. The typical pattern of left-lateralized activation for language production and right-lateralized activation for visuospatial memory was found in the majority of the children (58%). No age-related change in direction or strength of lateralization was found for language production. In contrast, the strength of lateralization (independent of direction) for visuospatial memory function continued to increase with age. In addition, boys showed a trend for stronger right-hemisphere lateralization for visuospatial memory than girls, but there was no gender effect on language laterality. We tested whether having language and visuospatial functions in the same hemisphere was associated with poor cognitive performance and found no evidence for this “functional crowding” hypothesis. We did, however, find that children with left-lateralized language production had higher vocabulary and nonword reading age-adjusted standard scores than other children, regardless of the laterality of visuospatial memory. Thus, a link between language function and left-hemisphere lateralization exists, and cannot be explained in terms of maturational change. PMID:22741100

  14. Determination of lateral-stability derivatives and transfer-function coefficients from frequency-response data for lateral motions

    NASA Technical Reports Server (NTRS)

    Donegan, James J; Robinson, Samuel W , Jr; Gates, Ordway, B , jr

    1955-01-01

    A method is presented for determining the lateral-stability derivatives, transfer-function coefficients, and the modes for lateral motion from frequency-response data for a rigid aircraft. The method is based on the application of the vector technique to the equations of lateral motion, so that the three equations of lateral motion can be separated into six equations. The method of least squares is then applied to the data for each of these equations to yield the coefficients of the equations of lateral motion from which the lateral-stability derivatives and lateral transfer-function coefficients are computed. Two numerical examples are given to demonstrate the use of the method.

  15. Miro1 deficiency in amyotrophic lateral sclerosis

    PubMed Central

    Zhang, Fan; Wang, Wenzhang; Siedlak, Sandra L.; Liu, Yingchao; Liu, Jun; Jiang, Keji; Perry, George; Zhu, Xiongwei; Wang, Xinglong

    2015-01-01

    Proper transportation of mitochondria to sites with high energy demands is critical for neuronal function and survival. Impaired mitochondrial movement has been repeatedly reported in motor neurons of amyotrophic lateral sclerosis (ALS) patients and indicated as an important mechanism contributing to motor neuron degeneration in ALS. Miro1, a RhoGTPase also referred to as Rhot1, is a key regulator of mitochondrial movement linking mitochondria and motor proteins. In this study, we investigated whether the expression of Miro1 was altered in ALS patients and ALS animal models. Immunoblot analysis revealed that Miro1 was significantly reduced in the spinal cord tissue of ALS patients. Consistently, the decreased expression of Miro1 was also noted only in the spinal cord, and not in the brain tissue of transgenic mice expressing ALS-associated SOD1 G93A or TDP-43 M337V. Glutamate excitotoxicity is one of the major pathophysiological mechanisms implicated in the pathogenesis of ALS, and we found that excessive glutamate challenge lead to significant reduction of Miro1 expression in spinal cord motor neurons both in vitro and in mice. Taken together, these findings show Miro1 deficiency in ALS patients and ALS animal models and suggest glutamate excitotoxicity as a likely cause of Miro1 deficiency.

  16. Redox Regulation in Amyotrophic Lateral Sclerosis

    PubMed Central

    Parakh, Sonam; Spencer, Damian M.; Halloran, Mark A.; Soo, Kai Y.; Atkin, Julie D.

    2013-01-01

    Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease that results from the death of upper and lower motor neurons. Due to a lack of effective treatment, it is imperative to understand the underlying mechanisms and processes involved in disease progression. Regulations in cellular reduction/oxidation (redox) processes are being increasingly implicated in disease. Here we discuss the possible involvement of redox dysregulation in the pathophysiology of ALS, either as a cause of cellular abnormalities or a consequence. We focus on its possible role in oxidative stress, protein misfolding, glutamate excitotoxicity, lipid peroxidation and cholesterol esterification, mitochondrial dysfunction, impaired axonal transport and neurofilament aggregation, autophagic stress, and endoplasmic reticulum (ER) stress. We also speculate that an ER chaperone protein disulphide isomerase (PDI) could play a key role in this dysregulation. PDI is essential for normal protein folding by oxidation and reduction of disulphide bonds, and hence any disruption to this process may have consequences for motor neurons. Addressing the mechanism underlying redox regulation and dysregulation may therefore help to unravel the molecular mechanism involved in ALS. PMID:23533690

  17. Laterally graded multilayer double-monochromator.

    SciTech Connect

    Als-Nielsen, J.; Erdmann, J.; Gaarde, P.; Krasnicki, S.; Liu, C.; Macrander, A. T.; Maj, J.; Mancini, D.

    1999-09-01

    The authors describe a tunable multilayer monochromator with an adjustable bandpass to be used for reflectivity and grazing incidence diffraction studies on surfaces at energies near 10 keV. Multilayers have a bandpass typically 100 times larger than the Si(111) reflection, and by using multilayers an experimenter can significantly increase data collection rates over those available with a Si monochromator. The transmission through 1 and 2 laterally graded multilayer (LGML) reflections was recorded versus photon energy. The identical LGMLs were comprised of 60 bilayers of W and C on 100 x 25 x 3 mm float glass with a bilayer spacing varying from 35 to 60 {angstrom}. The average gradient was 0.27 {angstrom}/mm along the long dimension. The rms deviation of the data for the bilayer spacing from a linear fit was 0.36 {angstrom}. Data were obtained for a nondispersive ({+-}) double-multilayer arrangement. The relative bandpass width (FWHM) when the two multilayers exposed the same bilayer spacing was measured to be 2.2% with a transmission of 78.7 {+-} 1.6%. This value is consistent with the transmission of 88.9% that they also measured for a single LGML at HASYLAB beamline D4. The bandpass was tunable in the range 1.1% to 2.2%.

  18. Aeroservoelastic tailoring for lateral control enhancement

    NASA Technical Reports Server (NTRS)

    Weisshaar, Terrence A.; Changho, Nam

    1989-01-01

    The need for effective aileron power for aircraft lateral control and turning maneuvers dates back to the Wright Brothers and their wing warping concept for active stabilization of their aircraft. Early researchers in Great Britain, Japan, Germany and the United States explored ways to increase the effectiveness of control aileron to generate a roll moment. The basic problem of aileron effectiveness and the interrelationship between structural distortion and the loads applied by the control surface is illustrated. A rigid wing/aileron surface will develop the capability to generate increased roll rates as airspeed increases. A flexible surface will become less effective as airspeed increases because of the twisting distortion created by the aft-mounted control surface. This tendency is further worsened by bending distortion of an aft swept wing. This study focuses its attention on the ability of a combined effort between structural redesign of a wing and sizing and placement of a control surface to create specified roll performance with a minimum hinge moment. This design optimization problem indicates the advantages of simultaneous consideration of structural design and control design.

  19. Field-effect-tuned lateral organic diodes

    PubMed Central

    Dhar, Bal Mukund; Kini, Geetha S.; Xia, Guoqiang; Jung, Byung Jun; Markovic, Nina; Katz, Howard E.

    2010-01-01

    The operation of organic diodes in solar cells and light-emitting displays strongly depends on the properties of the interfaces between hole- and electron-carrying organic semiconductors. Such interfaces are difficult to characterize, as they are usually buried under the surface or exist as an irregular “bulk heterojunction.” Using a unique fluorinated barrier layer-based lithographic technique, we fabricated a lateral organic p-n junction, allowing the first observation of the potential at an organic p-n interface simultaneously with the charge transport measurements. We find that the diode characteristics of the device (current output and rectification ratio) are consistent with the changes in the surface potentials near the junction, and the current-voltage curves and junction potentials are strongly and self-consistently modulated by a third, gate electrode. The generality of our technique makes this an attractive method to investigate the physics of organic semiconductor junctions. The lithographic technique is applicable to a wide variety of soft material patterns. The observation of built-in potentials makes an important connection between organic junctions and textbook descriptions of inorganic devices. Finally, these kinds of potentials may prove to be controlling factors in charge separation efficiency in organic photovoltaics. PMID:20160116

  20. Implicit Recognition Based on Lateralized Perceptual Fluency

    PubMed Central

    Vargas, Iliana M.; Voss, Joel L.; Paller, Ken A.

    2012-01-01

    In some circumstances, accurate recognition of repeated images in an explicit memory test is driven by implicit memory. We propose that this “implicit recognition” results from perceptual fluency that influences responding without awareness of memory retrieval. Here we examined whether recognition would vary if images appeared in the same or different visual hemifield during learning and testing. Kaleidoscope images were briefly presented left or right of fixation during divided-attention encoding. Presentation in the same visual hemifield at test produced higher recognition accuracy than presentation in the opposite visual hemifield, but only for guess responses. These correct guesses likely reflect a contribution from implicit recognition, given that when the stimulated visual hemifield was the same at study and test, recognition accuracy was higher for guess responses than for responses with any level of confidence. The dramatic difference in guessing accuracy as a function of lateralized perceptual overlap between study and test suggests that implicit recognition arises from memory storage in visual cortical networks that mediate repetition-induced fluency increments. PMID:24962684

  1. Lateral canal paroxysmal positional vertigo revisited.

    PubMed

    Nuti, Daniele; Mandalà, Marco; Salerni, Lorenzo

    2009-05-01

    The first reports of an involvement of the lateral canal (LC) in paroxysmal positional vertigo (PPV), were published in 1985, by Luciano Cipparrone et al., from Italy and Joseph McClure from Canada. The increasing interest of otolaryngologists and neurologists has led to a progressive advance in the knowledge of this labyrinthine disorder regarding its epidemiological, physiopathological, clinical, and therapeutic aspects. According to the most recent data, LC-benign PPV accounts for 17% of all PPV patients, regardless of gender and between the two labyrinths. The LC-PPV syndrome is characterized by intense positional vertigo and direction-changing geotropic horizontal nystagmus, both caused by rotation of the head in the supine position. Less frequently, it presents with apogeotropic nystagmus. In some patients nystagmus is also detectable in the sitting position, mimicking a spontaneous nystagmus. In most cases nystagmus is caused by displaced otoconia floating in the semicircular canal. The pathological side, which must be identified for successful treatment, is usually indicated by nystagmus intensity: the more intense positional nystagmus beats toward the affected ear. In a few cases, where there is no difference in nystgmus intensity, other indicators are necessary to determine the pathological side. Vestibular neuritis and posterior fossa lesions should be considered in the differential diagnosis. Treatment of LC-PPV relies on some physical maneuvers, the objective of which is to allow the otoconial debris to exit from the LC by centrifugal inertia and/or by gravitation. PMID:19645918

  2. Altered cortical communication in amyotrophic lateral sclerosis.

    PubMed

    Blain-Moraes, Stefanie; Mashour, George A; Lee, Heonsoo; Huggins, Jane E; Lee, Uncheol

    2013-05-24

    Amyotrophic lateral sclerosis (ALS) is a disorder associated primarily with the degeneration of the motor system. More recently, functional connectivity studies have demonstrated potentially adaptive changes in ALS brain organization, but disease-related changes in cortical communication remain unknown. We recruited individuals with ALS and age-matched controls to operate a brain-computer interface while electroencephalography was recorded over three sessions. Using normalized symbolic transfer entropy, we measured directed functional connectivity from frontal to parietal (feedback connectivity) and parietal to frontal (feedforward connectivity) regions. Feedback connectivity was not significantly different between groups, but feedforward connectivity was significantly higher in individuals with ALS. This result was consistent across a broad electroencephalographic spectrum (4-35 Hz), and in theta, alpha and beta frequency bands. Feedback connectivity has been associated with conscious state and was found to be independent of ALS symptom severity in this study, which may have significant implications for the detection of consciousness in individuals with advanced ALS. We suggest that increases in feedforward connectivity represent a compensatory response to the ALS-related loss of input such that sensory stimuli have sufficient strength to cross the threshold necessary for conscious processing in the global neuronal workspace. PMID:23567743

  3. Retinoid signaling alterations in amyotrophic lateral sclerosis

    PubMed Central

    Kolarcik, Christi L; Bowser, Robert

    2012-01-01

    Amyotrophic lateral sclerosis (ALS) is a fatal neuromuscular disease for which effective therapeutic interventions and an understanding of underlying disease mechanism are lacking. A variety of biochemical pathways are believed to contribute to the pathophysiology of ALS that are common to both sporadic and familial forms of the disease. Evidence from both human and animal studies indicates that expression of retinoid signaling genes is altered in ALS and may contribute to motor neuron loss. Our goals were to examine the expression and distribution of proteins of the retinoid signaling pathway in spinal cord samples from patients with sporadic and familial ALS and to evaluate the role of these proteins in motor neuron cell survival. In sporadic ALS, the cytoplasmic binding protein that facilitates nuclear translocation of retinoic acid, cellular retinoic acid binding protein-II (CRABP-II), was localized to the nucleus and retinoic acid receptor ? (RAR?) was significantly increased in motor neuron nuclei when compared to either familial ALS patients or non-neurologic disease controls. Motor neurons with increased nuclear RAR? were negative for markers of apoptosis. Pre-treatment of primary motor neuron-enriched cultures with a pan-RAR or RAR?-specific agonist decreased motor neuron cell death associated with oxidative injury/stress while a RAR?-specific antagonist enhanced cell death. Our data suggest retinoid signaling is altered in ALS and increased nuclear RAR? occurs in motor neurons of sporadic ALS patients. Activation of RAR? protects motor neurons from oxidative-induced cell death. PMID:23383387

  4. Possession divestment by sales in later life.

    PubMed

    Ekerdt, David J; Addington, Aislinn

    2015-08-01

    Residential relocation in later life is almost always a downsizing, with many possessions to be divested in a short period of time. This article examines older movers' capacities for selling things, and ways that selling attenuates people's ties to those things, thus accomplishing the human dis-possession of the material convoy. In qualitative interviews in 79 households in the Midwestern United States, older adults reported their experience with possession sales associated with residential relocation. Among this group, three-quarters of the households downsized by selling some belongings. Informal sales seemed the least fraught of all strategies, estate sales had mixed reviews, and garage sales were recalled as laborious. Sellers' efforts were eased by social relations and social networks as helpers and buyers came forward. As selling proceeded, sentiment about possessions waned as their materiality and economic value came to the fore, easing their detachment from the household. Possession selling is challenging because older adults are limited in the knowledge, skills, and efforts that they can apply to the recommodification of their belongings. Selling can nonetheless be encouraged as a divestment strategy as long as the frustrations and drawbacks are transparent, and the goal of ridding is kept in view. PMID:26162722

  5. Alcoholic Marriage: Later Start, Sooner End

    PubMed Central

    Waldron, Mary; Heath, Andrew C.; Lynskey, Michael T.; Bucholz, Kathleen K.; Madden, Pamela A. F.; Martin, Nicholas G.

    2010-01-01

    Background Although associations between drinking behavior and marital status are well documented, timing of marital transitions as a function of alcohol use or disorder has received limited empirical attention. Methods We examine the relationship between lifetime history of alcohol dependence (AD) and timing and survival of first marriages in a sample of 3575 female and 1845 male adult Australian twins born mostly between 1940 and 1964. Survival analyses were conducted using Cox proportional hazards regression models. Results Results indicate moderate delays in marriage associated with AD for both women and men. Among ever married respondents, AD was strongly predictive of early separation, with similar effects observed for women and men. Heritable sources of covariation were also documented. For women, genetic influences shared between early-onset AD and marital timing were found. Genetic influences shared between AD and marital survival were observed for women without regard to onset and for men with later-onset AD. Conclusions Results confirm the importance of AD as a predictor of both timing and survival of first marriages, with genetic influences contributing to observed associations. PMID:21244438

  6. Altered Cortical Communication in Amyotrophic Lateral Sclerosis

    PubMed Central

    Blain-Moraes, Stefanie; Mashour, George A.; Lee, Heonsoo; Huggins, Jane E.; Lee, UnCheol

    2013-01-01

    Amyotrophic lateral sclerosis (ALS) is a disorder associated primarily with the degeneration of the motor system. More recently, functional connectivity studies have demonstrated potentially adaptive changes in ALS brain organization, but disease-related changes in cortical communication remain unknown. We recruited individuals with ALS and age-matched controls to operate a brain-computer interface while electroencephalography was recorded over three sessions. Using normalized symbolic transfer entropy, we measured directed functional connectivity from frontal to parietal (feedback connectivity) and parietal to frontal (feedforward connectivity) regions. Feedback connectivity was not significantly different between groups, but feedforward connectivity was significantly higher in individuals with ALS. This result was consistent across a broad electroencephalographic spectrum (4 – 35 Hz), and in theta, alpha and beta frequency bands. Feedback connectivity has been associated with conscious state and was found to be independent of ALS symptom severity in this study, which may have significant implications for the detection of consciousness in individuals with advanced ALS. We suggest that increases in feedforward connectivity represent a compensatory response to the ALS-related loss of input such that sensory stimuli have sufficient strength to cross the threshold necessary for conscious processing in the global neuronal workspace. PMID:23567743

  7. Genetic epidemiology of amyotrophic lateral sclerosis.

    PubMed

    Majoor-Krakauer, D; Willems, P J; Hofman, A

    2003-02-01

    Amyotrophic lateral sclerosis (ALS) is a late onset, rapidly progressive and ultimately fatal neurological disorder, caused by the loss of motor neurons in the brain and spinal cord. Familial aggregation of ALS, with an age-dependent but high penetrance, is a major risk factor for ALS. Familial ALS (FALS) is clinically and genetically heterogeneous. Three genes and linkage to four additional gene loci have been identified so far and may either predominantly lead to ALS (ALSI-ALS6) or cause multisystem neurodegeneration with ALS as an occasional symptom (tauopathies, ALS-dementia complex). This review presents a tentative classification of the "major" ALS genes and ALS "susceptibility" genes, that may act as susceptibility factors for neurodegeneration in interaction with other genetic or environmental risk factors. Considering that mutations in ALS genes explain approximately 10% of familial as well as sporadic ALS, and most remaining cases of the discase are thought to result form the interaction of several genes and environmental factors, ALS is a paradigm for multifactorial discases. PMID:12630951

  8. Lateral position detection and control for friction stir systems

    DOEpatents

    Fleming, Paul; Lammlein, David H.; Cook, George E.; Wilkes, Don Mitchell; Strauss, Alvin M.; Delapp, David R.; Hartman, Daniel A.

    2012-06-05

    An apparatus and computer program are disclosed for processing at least one workpiece using a rotary tool with rotating member for contacting and processing the workpiece. The methods include oscillating the rotary tool laterally with respect to a selected propagation path for the rotating member with respect to the workpiece to define an oscillation path for the rotating member. The methods further include obtaining force signals or parameters related to the force experienced by the rotary tool at least while the rotating member is disposed at the extremes of the oscillation. The force signals or parameters associated with the extremes can then be analyzed to determine a lateral position of the selected path with respect to a target path and a lateral offset value can be determined based on the lateral position. The lateral distance between the selected path and the target path can be decreased based on the lateral offset value.

  9. Lateral position detection and control for friction stir systems

    DOEpatents

    Fleming, Paul (Boulder, CO); Lammlein, David H. (Houston, TX); Cook, George E. (Brentwood, TN); Wilkes, Don Mitchell (Nashville, TN); Strauss, Alvin M. (Nashville, TN); Delapp, David R. (Ashland City, TN); Hartman, Daniel A. (Fairhope, AL)

    2011-11-08

    Friction stir methods are disclosed for processing at least one workpiece using a rotary tool with rotating member for contacting and processing the workpiece. The methods include oscillating the rotary tool laterally with respect to a selected propagation path for the rotating member with respect to the workpiece to define an oscillation path for the rotating member. The methods further include obtaining force signals or parameters related to the force experienced by the rotary tool at least while the rotating member is disposed at the extremes of the oscillation. The force signals or parameters associated with the extremes can then be analyzed to determine a lateral position of the selected path with respect to a target path and a lateral offset value can be determined based on the lateral position. The lateral distance between the selected path and the target path can be decreased based on the lateral offset value.

  10. Differential bilingual laterality: mythical monster found in Wales.

    PubMed

    Evans, Judith; Workman, Lance; Mayer, Peter; Crowley, Kevin

    2002-11-01

    Paradis (1992) likens studies of bilingual laterality to reported sightings of the Loch Ness Monster, in that although some studies claim differential laterality much conflicting research evidence does not-and like the mythical Scottish monster, what reason have we to suspect that any such phenomenon might exist? This study reexamines differential bilingual laterality using four groups of English-Welsh bilinguals which differ in their age of acquisition and in their environment of acquisition. Using a split visual field paradigm we present evidence which, supports the notion of greater right hemisphere processing in a later learned language. Our findings also suggest the pattern of lateralization in bilinguals is strongly affected by the specific language environment during development such that the shift toward greater right hemisphere involvement for the later learned language will be more pronounced in individuals which are brought up in areas where that language is not regularly heard. PMID:12387799

  11. Lateral Shock of the R Aquarii Jet

    NASA Technical Reports Server (NTRS)

    Hollis, J. M.; Pedelty, J. A.; Kafatos, M.

    1997-01-01

    The R Aqr jet was observed with the VLA B-configuration at two epochs separated by approximately 13.2 yr. Comparison of the resulting 6 cm continuum images show that the radio jet has undergone a lateral counterclockwise rotation of approximately 6 deg-12 deg on the plane of the sky. The model of jet parcels on independent trajectories is difficult to reconcile with these observations and leads us to consider a path-oriented jet (i.e., younger parcels follow the same path as older parcels). Comparison of the most recent radio image with a nearly contemporaneous HST/FOC ultraviolet image at approximately 2330 Angstroms suggests that the ultraviolet emission lies along the leading side of the rotating radio jet. In conjunction with a proper motion analysis of the jet material that yields empirical space-velocity and resulting acceleration-magnitude relationships as a function of distance from the central source, we evaluate the observational results in terms of a schematic model in which the jet emission consists of plane-parallel isothermal shocks along the leading edge of rotation. In such a radiating shock, the ultraviolet-emitting region is consistent with the adiabatic region in the form of a high-temperature, low-density sheath that surrounds the cooled postshock radio-emitting region. Within the context of the schematic model, we obtain the temperatures, densities, and pressures within the preshock, adiabatic, and postshock regions as a function of distance from the central source; the physical parameters so derived compare favorably to previously published estimates. We obtain a total jet mass of 3.1 x 10(exp -5) solar mass and an age of approximately 115 yr. We evaluate the model in the context of its density-boundary condition, its applicability to an episodic or quasi-continuous jet, and angular momentum considerations.

  12. 7. SEGMENT OF LATERAL WITH YUCCA ALONG BANKS, SOUTH OF ...

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

    7. SEGMENT OF LATERAL WITH YUCCA ALONG BANKS, SOUTH OF 6TH AVENUE (SECTION 10). - Highline Canal, Sand Creek Lateral, Beginning at intersection of Peoria Street & Highline Canal in Arapahoe County (City of Aurora), Sand Creek lateral Extends 15 miles Northerly through Araphoe County, City & County of Denver, & Adams County to its end point, approximately 1/4 mile Southest of intersectioin of D Street & Ninth Avenue in Adams County (Rocky Mountain Arsenal, Commerce City Vicinity), Commerce City, Adams County, CO

  13. 13. TREES ALONG LATERAL SEGMENT AT THE NORTHERN END OF ...

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

    13. TREES ALONG LATERAL SEGMENT AT THE NORTHERN END OF LAKE LADORA. - Highline Canal, Sand Creek Lateral, Beginning at intersection of Peoria Street & Highline Canal in Arapahoe County (City of Aurora), Sand Creek lateral Extends 15 miles Northerly through Araphoe County, City & County of Denver, & Adams County to its end point, approximately 1/4 mile Southest of intersectioin of D Street & Ninth Avenue in Adams County (Rocky Mountain Arsenal, Commerce City Vicinity), Commerce City, Adams County, CO

  14. 8. GENERAL VIEW OF LARGE DIVERSION STRUCTURE ON LATERAL WEST ...

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

    8. GENERAL VIEW OF LARGE DIVERSION STRUCTURE ON LATERAL WEST OF LOWER DERBY LAKE (SECTION 2). - Highline Canal, Sand Creek Lateral, Beginning at intersection of Peoria Street & Highline Canal in Arapahoe County (City of Aurora), Sand Creek lateral Extends 15 miles Northerly through Araphoe County, City & County of Denver, & Adams County to its end point, approximately 1/4 mile Southest of intersectioin of D Street & Ninth Avenue in Adams County (Rocky Mountain Arsenal, Commerce City Vicinity), Commerce City, Adams County, CO

  15. 4. SEGMENT OF LATERAL WEST OF C STREET (SECTION 10) ...

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

    4. SEGMENT OF LATERAL WEST OF C STREET (SECTION 10) ON THE ROCKY MOUNTAIN ARSENAL (RMA). - Highline Canal, Sand Creek Lateral, Beginning at intersection of Peoria Street & Highline Canal in Arapahoe County (City of Aurora), Sand Creek lateral Extends 15 miles Northerly through Araphoe County, City & County of Denver, & Adams County to its end point, approximately 1/4 mile Southest of intersectioin of D Street & Ninth Avenue in Adams County (Rocky Mountain Arsenal, Commerce City Vicinity), Commerce City, Adams County, CO

  16. 24. CULVERT WITH CONCRETE HEADWALL AND SIDEWALLS CARRYING THE LATERAL ...

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

    24. CULVERT WITH CONCRETE HEADWALL AND SIDEWALLS CARRYING THE LATERAL UNDER 8TH AVENUE. - Highline Canal, Sand Creek Lateral, Beginning at intersection of Peoria Street & Highline Canal in Arapahoe County (City of Aurora), Sand Creek lateral Extends 15 miles Northerly through Araphoe County, City & County of Denver, & Adams County to its end point, approximately 1/4 mile Southest of intersectioin of D Street & Ninth Avenue in Adams County (Rocky Mountain Arsenal, Commerce City Vicinity), Commerce City, Adams County, CO

  17. 2. COURSE OF THE LATERAL THROUGH DEL NORTHWEST MAR PARK. ...

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

    2. COURSE OF THE LATERAL THROUGH DEL NORTHWEST MAR PARK. - Highline Canal, Sand Creek Lateral, Beginning at intersection of Peoria Street & Highline Canal in Arapahoe County (City of Aurora), Sand Creek lateral Extends 15 miles Northerly through Araphoe County, City & County of Denver, & Adams County to its end point, approximately 1/4 mile Southest of intersectioin of D Street & Ninth Avenue in Adams County (Rocky Mountain Arsenal, Commerce City Vicinity), Commerce City, Adams County, CO

  18. Modified obtuse-angled lateral exposure of the calcaneum

    Microsoft Academic Search

    Tarek Hussain; Husain Al-Mutairi; Sabrine Al-Zamel; Waleed Al-Tunaib

    2004-01-01

    Objective: The objective of this study is to compare the incidence of post-operative skin healing problems between the classic extensile lateral calcaneal approach and a modified obtuse-angle lateral exposure during the period 1994–2003.Methods: The classic extensile lateral calcaneal approach as described in the literature was (used in 55 cases of calcaneal fractures), while the obtuse-angled approach (used in other 39

  19. Development of the lateral line system in the shovelnose sturgeon.

    PubMed

    Gibbs, Melissa A; Northcutt, R Glenn

    2004-01-01

    The lateral line systems of aquatic amphibians and all chondrichthyan and osteichthyan fish present a similar array of mechanoreceptors. However, electroreceptors, the second major component of the lateral line system, have clearly undergone more significant evolutionary change. Chondrichthyans and non-neopterygian fish possess primitive ampullary organ electroreceptors, whereas significantly different 'new' ampullary organs and tuberous electroreceptors are found in a few groups of teleosts (mormyrids, gymnotids and some catfish). The pairing of mechano- and electroreceptors in the lateral line system, as well as the morphologically and physiologically distinct electroreceptors of teleosts have inspired several recent studies on the origin and evolution of the lateral line receptors. We described the development of the lateral line system in sturgeon (Scaphirhynchus platorynchus) as part of an outgroup analysis of lateral line development in three taxa: vertebrates that have both mechanoreceptive neuromasts and primitive electroreceptors; neopterygian fish that only have mechanoreceptors; and teleosts that have re-evolved new electroreceptors. Development in Scaphirhynchus was consistent with previously studied taxa in that the lateral line system developed from a series of six dorsolateral placodes. Interestingly, we found that the octaval placode was bound rostrally and caudally by large placodal fields, out of which the six lateral line placodes arose. This finding supports recent suggestions for a common placodal primordium for all placodes. Each of the six placodes gave rise to the lateral line nerves before elongating into sensory ridges, which contained neuromast primordia. The ampullary organ fields of Scaphirhynchus arose from the lateral zones of the anterodorsal, anteroventral, otic and supratemporal sensory ridges, which is also consistent with recently studied taxa. Comparisons of the lateral line system of Scaphirhynchus and close relatives, Acipenser and Polyodon, indicate that variation in some aspects of lateral line receptor numbers and distribution are related to changes in head morphology and feeding strategy, whereas other changes, such as a reduction in receptor number without a change in placode field size, indicate changes in placode development. PMID:15205543

  20. Review of common and unusual causes of lateral ankle pain

    Microsoft Academic Search

    Surabhi Choudhary; Eugene McNally

    Lateral ankle pain is a common clinical presentation having several important causes, including lateral ligament injury, peroneal\\u000a tendon injury, sinus tarsi syndrome, and nerve entrapments. However, other causes should be kept in mind in patients with\\u000a unusual patterns of pain or intractable symptoms. We present a review of common and some unusual causes of lateral ankle pain\\u000a including a review

  1. Lateral Patellotibial Ligament Reconstruction for Medial Patellar Instability

    PubMed Central

    Sawyer, Gregory A.; Cram, Tyler; LaPrade, Robert F.

    2014-01-01

    Medial patellar instability, though infrequently recognized, can be a disabling complication of a lateral retinacular release. Patients with persistent anterior knee pain and instability after lateral release should be evaluated closely. If evidence of increased medial patellar translation is identified on physical examination, a trial of reverse McConnell taping should be prescribed. If there is noted improvement in symptoms after this taping trial, reconstruction of the lateral patellotibial ligament should be considered. This article details our technique for lateral patellotibial ligament reconstruction using iliotibial band and patellar tendon autografts. PMID:25473603

  2. Lateral Patellofemoral Ligament Reconstruction Using a Quadriceps Tendon Graft

    PubMed Central

    Saper, Michael G.; Shneider, David A.

    2014-01-01

    Medial patellar subluxation (MPS) is normally described after a lateral retinacular release. However, isolated MPS in the absence of a previous lateral release does occur. This type of patellar instability is often overlooked, and a high index of suspicion is needed for appropriate diagnosis and treatment. This report describes a technique developed in response to episodes of isolated MPS. The technique uses a partial-thickness graft from the quadriceps tendon to reconstruct the lateral patellofemoral ligament and provide stability to the lateral side of the patella. PMID:25264506

  3. Gene for a protein capable of enhancing lateral root formation.

    PubMed

    Mikami, Y; Horiike, G; Kuroyanagi, M; Noguchi, H; Shimizu, M; Niwa, Y; Kobayashi, H

    1999-05-14

    Analysis of genes preferentially expressed in hairy roots caused by infection with Agrobacterium rhizogenes has provided insights into the regulation of lateral root formation. A hairy root preferential cDNA, HR7, has been cloned from hairy roots of Hyoscyamus niger. HR7 encodes a novel protein partially homologous to a metallocarboxypeptidase inhibitor and is expressed exclusively in the primordium and base of lateral roots in hairy roots. Overexpression of HR7 in transgenic roots of H. niger dramatically enhances the frequency of lateral root formation. The results of this study indicate that expression of HR7 plays a critical role in initiating lateral root formation. PMID:10356981

  4. FILM OPTION CURRICULUM (FOR STUDENTS ENTERING FALL, 2011 OR LATER)

    E-print Network

    Lawrence, Rick L.

    FILM OPTION CURRICULUM (FOR STUDENTS ENTERING FALL, 2011 OR LATER) NOTE ON REVERSE. GATE REQUIREMENTS FOR FILM OPTION: FILM 100IH ­ Introduction to Film & Photography ...................................................................... 3

  5. 19. DETAIL VIEW OF LATERAL BRACING, NORTH ELEVATION, LOOKING NORTHWEST ...

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

    19. DETAIL VIEW OF LATERAL BRACING, NORTH ELEVATION, LOOKING NORTHWEST - Mystic River Drawbridge No. 7, Spanning Mystic River at Boston & Maine Railroad Eastern Route, Somerville, Middlesex County, MA

  6. 23. VIEW SHOWING SALT RIVER PROJECT CREWS SLIPFORMING LATERAL DURING ...

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

    23. VIEW SHOWING SALT RIVER PROJECT CREWS SLIPFORMING LATERAL DURING REHABILITATION AND BETTERMENT PROGRAM Photographer: unknown. April 1968 - Arizona Canal, North of Salt River, Phoenix, Maricopa County, AZ

  7. Computer Engineering Review Task Force Report John Impagliazzo (Moderator) Susan Conry Eric Durant

    E-print Network

    Thornton, Mitchell

    Computer Engineering Review Task Force Report John Impagliazzo (Moderator) Susan Conry Eric Durant "Curriculum Guidelines for Undergraduate Degree Programs in Computer Engineering," produced 2004 December 12 topics that appeared to be waning from the curricular mainstream of computer engineering. Additionally

  8. Serotonergic mechanisms in amyotrophic lateral sclerosis.

    PubMed

    Sandyk, Reuven

    2006-07-01

    Serotonin (5-HT) has been intimately linked with global regulation of motor behavior, local control of motoneuron excitability, functional recovery of spinal motoneurons as well as neuronal maturation and aging. Selective degeneration of motoneurons is the pathological hallmark of amyotrophic lateral sclerosis (ALS). Motoneurons that are preferentially affected in ALS are also densely innervated by 5-HT neurons (e.g., trigeminal, facial, ambiguus, and hypoglossal brainstem nuclei as well as ventral horn and motor cortex). Conversely, motoneuron groups that appear more resistant to the process of neurodegeneration in ALS (e.g., oculomotor, trochlear, and abducens nuclei) as well as the cerebellum receive only sparse 5-HT input. The glutamate excitotoxicity theory maintains that in ALS degeneration of motoneurons is caused by excessive glutamate neurotransmission, which is neurotoxic. Because of its facilitatory effects on glutaminergic motoneuron excitation, 5-HT may be pivotal to the pathogenesis and therapy of ALS. 5-HT levels as well as the concentrations 5-hydroxyindole acetic acid (5-HIAA), the major metabolite of 5-HT, are reduced in postmortem spinal cord tissue of ALS patients indicating decreased 5-HT release. Furthermore, cerebrospinal fluid levels of tryptophan, a precursor of 5-HT, are decreased in patients with ALS and plasma concentrations of tryptophan are also decreased with the lowest levels found in the most severely affected patients. In ALS progressive degeneration of 5-HT neurons would result in a compensatory increase in glutamate excitation of motoneurons. Additionally, because 5-HT, acting through presynaptic 5-HT1B receptors, inhibits glutamatergic synaptic transmission, lowered 5-HT activity would lead to increased synaptic glutamate release. Furthermore, 5-HT is a precursor of melatonin, which inhibits glutamate release and glutamate-induced neurotoxicity. Thus, progressive degeneration of 5-HT neurons affecting motoneuron activity constitutes the prime mover of the disease and its progression and treatment of ALS needs to be focused primarily on boosting 5-HT functions (e.g., pharmacologically via its precursors, reuptake inhibitors, selective 5-HT1A receptor agonists/5-HT2 receptor antagonists, and electrically through transcranial administration of AC pulsed picotesla electromagnetic fields) to prevent excessive glutamate activity in the motoneurons. In fact, 5HT1A and 5HT2 receptor agonists have been shown to prevent glutamate-induced neurotoxicity in primary cortical cell cultures and the 5-HT precursor 5-hydroxytryptophan (5-HTP) improved locomotor function and survival of transgenic SOD1 G93A mice, an animal model of ALS. PMID:16861147

  9. Laterality of a second player position affects lateral deviation of basketball shooting.

    PubMed

    Viggiano, Andrea; Chieffi, Sergio; Tafuri, Domenico; Messina, Giovanni; Monda, Marcellino; De Luca, Bruno

    2014-01-01

    Asymmetrically placed visual distractors are known to cause a lateral bias in the execution of a movement directed toward a target. The aim of the present experiment was to verify if the trajectory of the ball and the trajectory of the jump for a basket-shot can be affected by the sole position of a second player, who stays in front of the shooting player in one of three possible positions (centre, left or right) but too far to physically interfere with the shot. Young basketball players were asked to perform 60 shots at 6.25 m from a regular basket, with or without a second player staying in front of them in, alternately, a centre, left or right position. A computerised system measured the angular deviation of the jump direction from the vertical direction and the lateral deviation of the ball trajectory from the midline. The results showed that both the jump direction and the entry position of the ball deviated toward the opposite side from the second player's side; however, these effects were too small to significantly affect the mean goal percentage. This result confirms that some placements of the players can have an effect as visual distractors. Further studies are necessary to find what game conditions can make such distractors harmful for the athletic performance. PMID:23876006

  10. Orienting asymmetries and lateralized processing of sounds in humans

    Microsoft Academic Search

    Julia Fischer; Christoph Teufel; Matthis Drolet; Annika Patzelt; Rudolf Rübsamen; D Yves von Cramon; Ricarda I Schubotz

    2009-01-01

    BACKGROUND: Lateralized processing of speech is a well studied phenomenon in humans. Both anatomical and neurophysiological studies support the view that nonhuman primates and other animal species also reveal hemispheric differences in areas involved in sound processing. In recent years, an increasing number of studies on a range of taxa have employed an orienting paradigm to investigate lateralized acoustic processing.

  11. Study of design directions for lateral vehicle control

    Microsoft Academic Search

    Jurgen Guldner; Han-Shue Tan; Satyajit Patwardhan

    1997-01-01

    Lateral vehicle control for passenger cars, a vital control subsystem of automated highway systems (AHS), has been studied for several decades. Different reference systems have been examined for detecting the lateral vehicle displacement from the lane center. Implementations of `look-down' reference systems, however, encountered practical constraints, limiting driving speed to approximately 20 m\\/s under realistic conditions. This paper presents new

  12. Lateral asymmetry of eye use in Octopus vulgaris

    Microsoft Academic Search

    Ruth A. Byrne; Michael Kuba; Ulrike Griebel

    2002-01-01

    The lateralization of sensory and motor functions has been recently demonstrated in various groups of vertebrates. We examined lateral asymmetry of eye use in Octopus vulgaris by behavioural methods. Octopus vulgaris uses monocular vision almost exclusively and can move its eyes independently. The amount of binocular vision is small because the eyes are on the sides of the head. We

  13. Early teaching of Chinese literacy skills and later literacy outcomes

    Microsoft Academic Search

    Hui Li; Loraine F. Corrie; Betty Kit Mei Wong

    2008-01-01

    This study followed 88 children in Beijing and Hong Kong for three years to investigate the relationships between the early teaching of literacy skills and later literacy outcomes. The children were administered the Preschool and Primary Chinese Literacy Scale at the age of five years, and three years later. Their parents and teachers reported on their involvement in literacy teaching,

  14. Phosphorus lateral movement through subsoil to subsurface tile drains

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Vertical subsurface P transport to tile drains is well documented, however little research has focused on lateral P transport. A replicated field study investigated the lateral movement of P through 3.0 m of typical Iowa subsoil (sandy loam texture, pH 7.7, 2 mg kg-1 Olsen P) between a 1.2-m deep tr...

  15. Semiconductor alloy nanoribbon lateral heterostructures for high-performance photodetectors.

    PubMed

    Guo, Pengfei; Hu, Wei; Zhang, Qinglin; Zhuang, Xiujuan; Zhu, Xiaoli; Zhou, Hong; Shan, Zhengping; Xu, Jinyou; Pan, Anlian

    2014-05-01

    High-performance visible-light photodetectors are achieved based on single nanoribbon lateral heterostructures composed of two different semiconductor alloys epitaxially grown in the lateral direction. They reveal superior spectral response range, responsivity, Ion/Ioff ratio, and external quantum efficiency, relative to devices based on single composition structures. PMID:24677130

  16. Evidence for Presynaptic Inhibition in the Lateral Geniculate Body

    Microsoft Academic Search

    A. Angel; F. Magni; P. Strata

    1965-01-01

    SZENTÀGOTHAI1 reported the presence of axo-axonic endings on fibres entering the lateral geniculate body from the retina. Bizzi and Brooks2 have shown that in the unanaesthetized, unrestrained cat irregular groups of waves could be recorded simultaneously from the pontine reticular formation and the lateral geniculate body during the desynchronized phase of sleep. The latter waves could no longer be recorded

  17. Lateralization of magnetic compass orientation in a migratory bird

    Microsoft Academic Search

    Wolfgang Wiltschko; Joachim Traudt; Onur Güntürkün; Helmut Prior; Roswitha Wiltschko

    2002-01-01

    Lateralization of brain functions, once believed to be a human characteristic, has now been found to be widespread among vertebrates. In birds, asymmetries of visual functions are well studied, with each hemisphere being specialized for different tasks. Here we report lateralized functions of the birds' visual system associated with magnetoperception, resulting in an extreme asymmetry of sensing the direction of

  18. CEE 812 Structural Engineering Seminar Series Approximate Lateral Analysis

    E-print Network

    Kamat, Vineet R.

    CEE 812 ­ Structural Engineering Seminar Series Approximate Lateral Analysis of Steel Moment of analysis and design of steel moment frame structures under lateral load and defining a quick analysis Frame Structures by John McCarthy, SE, PE Structural Engineer, Black & Veatch Corporation Ann Arbor

  19. Cognitive Impairment in the Lateralized Phenotype of Corticobasal Degeneration

    Microsoft Academic Search

    Rita Moretti; Paola Torre; Rodolfo M. Antonello; Tatiana Cattaruzza; Giuseppe Cazzato

    2005-01-01

    Corticobasal degeneration (CBD) is a rare disorder, which normally includes a combination of neurobehavioural features, movement disorders and other manifestations. It is now recognized that CBD patients usually present with two phenotypes: the lateralized phenotype and the dementia phenotype. The aim of our work was to determine the nature and the progression of cognitive and behavioural impairment in 10 lateralized

  20. Learning Objectives: Frontal Lisp, Lateral List, Distorted R

    E-print Network

    Elsherbeni, Atef Z.

    Learning Objectives: Frontal Lisp, Lateral List, Distorted R · Diagnosis · Create central groove the consonantal & vocalic "R" · Design appropriate homework for the lisps & "R" Carryover in Articulation Therapy-SLP Frontal Lisp, Lateral Lisp, Distorted R Developing Carryover in Articulation Therapy Sponsored by: UM

  1. Tidal variability of lateral advection in a coastal plain estuary

    NASA Astrophysics Data System (ADS)

    Basdurak, N. B.; Valle-Levinson, A.

    2013-07-01

    Tidal variability of lateral advection of momentum (vuy, where u and v are along-estuary and lateral flows, respectively, and the subindex indicates differentiation with respect to the cross-estuary direction) was investigated in a coastal plain estuary with observations at Hampton Roads, which is the transition between the James River and Chesapeake Bay. Towed current velocity profiles and hydrographic profiles were captured during 9 expeditions in 2004 and 2005, to determine the intratidal and spatial changes in lateral advection of momentum and its contribution to along-channel flow. Curvature effects and lateral density gradients were important in driving lateral circulation and in modifying intratidal lateral advection of momentum. Lateral advection had the same order of magnitude as the baroclinic pressure gradient. Its contribution to the along-channel momentum balance was greatest during or just after peak flood and weakest at the end of ebb. During peak flood and peak ebb, the spatial distribution of vuy was seaward at the southern (left) side near surface and at the northern side (right) near bed (looking up-estuary), and landward in the rest of the channel. During slack periods the vuy structures were mostly landward. Observations were in good agreement with analytical model results during peak ebb and flood, but inconsistent during slack periods. The discrepancies between model results and field measurements can be attributed to bathymetry-density gradient interactions, which enhanced ebb-to-flood asymmetries in the along-channel and lateral flow.

  2. Pattern formation in the lateral line of zebrash Nicolas Gompela

    E-print Network

    Montpellier II, Université

    . The major branch of the PLL, called the lateral or midbody branch (L-PLL), runs from head to tail along each that heterogeneities within the migrating primordium pre®gure neuromast formation. q 2001 Elsevier Science Ireland Ltd comprises two major components: the anterior lateral line (ALL) which includes the neuromasts present

  3. River Elongation as a Proxy for Lateral Channel Activity

    Microsoft Academic Search

    J. W. Lauer

    2009-01-01

    Lateral channel movement is a process that is tightly linked to both channel hydraulics and sediment transport, strongly influences floodplain ecology, and also has great relevance for banktop property owners. The correlation between channel migration rate and channel curvature usually causes meandering river channels to elongate as they migrate laterally. Over the long term, the increase in sinuosity is compensated

  4. LATERAL GENE TRANSFER IN MYCOBACTERIUM AVIUM SUBSPECIES PARATUBERCULOSIS

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Lateral gene transfer is an integral part of genome evolution in most bacteria. Bacteria can readily change the contents of their genomes in order to increase adaptability to ever changing surroundings and to generate evolutionary novelty. Here, we report instances of lateral gene transfer in M. avi...

  5. Children's Rorschach Scores as Predictors of Later Adjustment.

    ERIC Educational Resources Information Center

    Tuber, Steven B.

    1983-01-01

    Tested the hypothesis that Rorschach measures of object relations and thought organization could help predict later adjustment. Former patients (N=70) at a child residential treatment center were followed up as adults. Object relations measures were found to be effective discriminators and predictors of later rehospitalization for boys. (JAC)

  6. Development of the Lateral Line System in the Shovelnose Sturgeon

    Microsoft Academic Search

    Melissa A. Gibbs; R. Glenn Northcutt

    2004-01-01

    The lateral line systems of aquatic amphibians and all chondrichthyan and osteichthyan fish present a similar array of mechanoreceptors. However, electroreceptors, the second major component of the lateral line system, have clearly undergone more significant evolutionary change. Chondrichthyans and non-neopterygian fish possess primitive ampullary organ electroreceptors, whereas significantly different ‘new’ ampullary organs and tuberous electroreceptors are found in a few

  7. On the Relationship Between Lateralized Brain Function and Orienting Asymmetries

    E-print Network

    Ghazanfar, Asif

    areas of the brain (Broca, 1861; Wernicke, 1874). The loci of brain lesions detected by postmortemOn the Relationship Between Lateralized Brain Function and Orienting Asymmetries Christoph Teufel will require a much better understanding of how lateralized brain functions interact with overt behaviors

  8. Non-spatially lateralized mechanisms in hemispatial neglect

    Microsoft Academic Search

    Masud Husain; Chris Rorden

    2003-01-01

    Hemispatial neglect is a common, disabling disorder that results from brain damage, most frequently stroke. Research on patients with neglect has provided important insights into normal brain mechanisms involved in directing attention, representing space and controlling movement. Although much work has focused on the lateralized components of neglect, recent investigations have also revealed deficits that are not spatially lateralized, consistent

  9. Long-term results of the lateral tunnel Fontan operation

    Microsoft Academic Search

    Christof Stamm; Ingeborg Friehs; John E. Mayer; David Zurakowski; John K. Triedman; Adrian M. Moran; Edward P. Walsh; James E. Lock; Richard A. Jonas; Pedro J. del Nido

    2001-01-01

    Objectives: Completion of a total cavopulmonary anastomosis with an intra-atrial lateral tunnel is known to yield good early and midterm results. In this study, we sought to determine the long-term outcome (10 years) after a lateral tunnel Fontan procedure. Methods: Between October 1987 and December 1991, 220 patients (aged 11 months to 32 years) with a wide range of underlying

  10. Lateral Preference and Cognitive Skills: An Indirect Test.

    ERIC Educational Resources Information Center

    Coren, Stanley; Porac, Clare

    1982-01-01

    Lateral preferences as manifest in handedness, footedness, eyedness, and earedness were assessed in college students. Consistent right-handedness was most prevalent in language and literature majors. No relationships between major and other indexes of lateral preference were found. (Author/RD)

  11. Semiconductor Lateral Surface Superlattice Devices Fabricated by Electron Beam Lithography

    Microsoft Academic Search

    Jun Ma

    1990-01-01

    The advent of nanofabrication technology has led to the fabrication of ultra-small semiconductor devices and structures with lateral dimensions down to tens of nanometers. In this dissertation research, experimental studies on a more complicated nanostructure, the semiconductor lateral surface superlattice (LSSL), in which novel quantum interference effects are observable due to the small feature sizes of the device, have been

  12. Otitis Media in Early Childhood and Later Language.

    ERIC Educational Resources Information Center

    Roberts, Joanne E.; And Others

    1991-01-01

    The relationship between early otitis media with effusion (OME) and later language development was examined in a prospective cohort of 30 children from middle class families and 33 children from low income families. Findings suggested no reliable relationship between early OME experience and later language development. (Author/DB)

  13. Two distinct forms of functional lateralization in the human brain

    PubMed Central

    Gotts, Stephen J.; Jo, Hang Joon; Wallace, Gregory L.; Saad, Ziad S.; Cox, Robert W.; Martin, Alex

    2013-01-01

    The hemispheric lateralization of certain faculties in the human brain has long been held to be beneficial for functioning. However, quantitative relationships between the degree of lateralization in particular brain regions and the level of functioning have yet to be established. Here we demonstrate that two distinct forms of functional lateralization are present in the left vs. the right cerebral hemisphere, with the left hemisphere showing a preference to interact more exclusively with itself, particularly for cortical regions involved in language and fine motor coordination. In contrast, right-hemisphere cortical regions involved in visuospatial and attentional processing interact in a more integrative fashion with both hemispheres. The degree of lateralization present in these distinct systems selectively predicted behavioral measures of verbal and visuospatial ability, providing direct evidence that lateralization is associated with enhanced cognitive ability. PMID:23959883

  14. Centrifuge Modeling of Piles Subjected to Lateral Loads

    NASA Astrophysics Data System (ADS)

    Brant, Logan; Ling, Hoe I.

    There are many applications where piles are employed to absorb and deflect lateral impact loads. Structural elements of this type are used to protect infrastructure and are commonly found at marine sites. A series of model tests have been conducted using Columbia University's centrifuge facility to better understand the performance of piles subjected to these loading conditions. A device was designed to install and laterally load single model piles during centrifuge flight. This device uniquely contains two lateral loading systems, one which allows static testing and another appropriate for dynamic tests. This research examines the behavior of tubular steel piles embedded within dry or saturated soil and subjected to varied rates of lateral loading. This investigation provides insight on the contribution of lateral loading rates to the behavior of piles.

  15. ELECTRICAL RESPONSES FROM THE LATERAL-LINE NERVES OF FISHES

    PubMed Central

    Hoagland, Hudson

    1934-01-01

    Records of spontaneous discharge of nerve impulses, similar to that previously described in catfish and in trout, have been obtained from lateral-line nerves of goldfish and perch, by the use of concentric micro electrodes slipped under the nerve in situ. These impulses have been followed into the central nervous system. They enter the tuberculum acusticum and thence apparently spread diffusely through the cerebellum. Cutting the lateral-line nerve on one side silences the ipsilateral tuberculum acusticum, but only reduces the intensity of ipsilateral cerebellar activity. Cutting the remaining lateral-line nerve silences activity throughout the tuberculum acusticum and the cerebellum. The maintenance of tonic activity in the tuberculum acusticum by way of lateral-line discharge may account for the inhibitory effects of the lateral-line system on auditory responses. PMID:19872827

  16. Syndesmosis and lateral ankle sprains in the National Football League.

    PubMed

    Osbahr, Daryl C; Drakos, Mark C; O'Loughlin, Padhraig F; Lyman, Stephen; Barnes, Ronnie P; Kennedy, John G; Warren, Russell F

    2013-11-01

    Syndesmosis sprains in the National Football League (NFL) can be a persistent source of disability, especially compared with lateral ankle injuries. This study evaluated syndesmosis and lateral ankle sprains in NFL players to allow for better identification and management of these injuries. Syndesmosis and lateral ankle sprains from a single NFL team database were reviewed over a 15-year period, and 32 NFL team physicians completed a questionnaire detailing their management approach. A comparative analysis was performed analyzing several variables, including diagnosis, treatment methods, and time lost from sports participation. Thirty-six syndesmosis and 53 lateral ankle sprains occurred in the cohort of NFL players. The injury mechanism typically resulted from direct impact in the syndesmosis and torsion in the lateral ankle sprain group (P=.034). All players were managed nonoperatively. The mean time lost from participation was 15.4 days in the syndesmosis and 6.5 days in the lateral ankle sprain groups (P?.001). National Football League team physicians varied treatment for syndesmosis sprains depending on the category of diastasis but recommended nonoperative management for lateral ankle sprains. Syndesmosis sprains in the NFL can be a source of significant disability compared with lateral ankle sprains. Successful return to play with nonoperative management is frequently achieved for syndesmosis and lateral ankle sprains depending on injury severity. With modern treatment algorithms for syndesmosis sprains, more aggressive nonoperative treatment is advocated. Although the current study shows that syndesmosis injuries require longer rehabilitation periods when compared with lateral ankle sprains, the time lost from participation may not be as prolonged as previously reported. PMID:24200441

  17. Effect of midbrain raphe and lateral mesencephalic stimulation on spontaneous and evoked activity in the lateral geniculate of the cat

    Microsoft Academic Search

    Warren E. Foote; Raymond J. Maciewicz; John P. Mordes

    1974-01-01

    Summary  Single shock stimulation of the midbrain raphe and lateral reticular formation altered the spontaneous and evoked activity of single cells in the dorsal lateral geniculate of the cat. The effect of stimulation was to produce a facilitation of 64 units with a latency of 15 msec or greater and an inhibition of 30 units with a latency of 7 to

  18. Imaging Findings Associated with Cognitive Performance in Primary Lateral Sclerosis and Amyotrophic Lateral Sclerosis

    PubMed Central

    Meoded, Avner; Kwan, Justin Y.; Peters, Tracy L.; Huey, Edward D.; Danielian, Laura E.; Wiggs, Edythe; Morrissette, Arthur; Wu, Tianxia; Russell, James W.; Bayat, Elham; Grafman, Jordan; Floeter, Mary Kay

    2013-01-01

    Introduction Executive dysfunction occurs in many patients with amyotrophic lateral sclerosis (ALS), but it has not been well studied in primary lateral sclerosis (PLS). The aims of this study were to (1) compare cognitive function in PLS to that in ALS patients, (2) explore the relationship between performance on specific cognitive tests and diffusion tensor imaging (DTI) metrics of white matter tracts and gray matter volumes, and (3) compare DTI metrics in patients with and without cognitive and behavioral changes. Methods The Delis-Kaplan Executive Function System (D-KEFS), the Mattis Dementia Rating Scale (DRS-2), and other behavior and mood scales were administered to 25 ALS patients and 25 PLS patients. Seventeen of the PLS patients, 13 of the ALS patients, and 17 healthy controls underwent structural magnetic resonance imaging (MRI) and DTI. Atlas-based analysis using MRI Studio software was used to measure fractional anisotropy, and axial and radial diffusivity of selected white matter tracts. Voxel-based morphometry was used to assess gray matter volumes. The relationship between diffusion properties of selected association and commissural white matter and performance on executive function and memory tests was explored using a linear regression model. Results More ALS than PLS patients had abnormal scores on the DRS-2. DRS-2 and D-KEFS scores were related to DTI metrics in several long association tracts and the callosum. Reduced gray matter volumes in motor and perirolandic areas were not associated with cognitive scores. Conclusion The changes in diffusion metrics of white matter long association tracts suggest that the loss of integrity of the networks connecting fronto-temporal areas to parietal and occipital areas contributes to cognitive impairment. PMID:24052798

  19. Deep transverse friction massage for treating lateral elbow or lateral knee tendinitis.

    PubMed

    Loew, Laurianne M; Brosseau, Lucie; Tugwell, Peter; Wells, George A; Welch, Vivian; Shea, Beverley; Poitras, Stephane; De Angelis, Gino; Rahman, Prinon

    2014-01-01

    Background Deep transverse friction massage, one of several physical therapy interventions suggested for the management of tendinitis pain, was first demonstrated in the 1930s by Dr James Cyriax, a renowned orthopedic surgeon in England. Its goal is to prevent abnormal fibrous adhesions and abnormal scarring. This is an update of a Cochrane review first published in 2001.Objectives To assess the benefits and harms of deep transverse friction massage for treating lateral elbow or lateral knee tendinitis.Search methods We searched the following electronic databases: the specialized central registry of the Cochrane Field of Physical and Related Therapies,the Cochrane Central Register of Controlled Trials (CENTRAL),MEDLINE, EMBASE, the Cumulative Index to Nursing and Allied Health Literature (CINAHL), Clinicaltrials.gov, and the Physiotherapy Evidence Database (PEDro), up until July 2014. The reference lists of these trials were consulted for additional studies.Selection criteria All randomized controlled trials (RCTs) and controlled clinical trials (CCTs) comparing deep transverse friction massage with control or other active interventions for study participants with two eligible types of tendinitis (ie, extensor carpi radialis tendinitis (lateral elbow tendinitis, tennis elbow or lateral epicondylitis or lateralis epicondylitis humeri) and iliotibial band friction syndrome (lateral knee tendinitis)) were selected. Only studies published in English and French languages were included.Data collection and analysis Two review authors independently assessed the studies on the basis of inclusion and exclusion criteria. Results of individual trials were extracted from the included study using extraction forms prepared by two independent review authors before the review was begun.Data were cross-checked by a third review author. Risk of bias of the included studies was assessed using the "Risk of bias"tool of The Cochrane Collaboration. A pooled analysis was performed using mean difference (MD) for continuous outcomes and risk ratio (RR)for dichotomous outcomes with 95% confidence intervals (CIs).Main results Two RCTs (no new additional studies in this update) with 57 participants met the inclusion criteria. These studies demonstrated high risk of performance and detection bias, and the risk of selection, attrition, and reporting bias was unclear.The first study included 40 participants with lateral elbow tendinitis and compared (1) deep transverse friction massage combined with therapeutic ultrasound and placebo ointment (n = 11) versus therapeutic ultrasound and placebo ointment only (n = 9) and (2)deep transverse friction massage combined with phonophoresis (n = 10) versus phonophoresis only (n = 10). No statistically significant differences were reported within five weeks for mean change in pain on a 0 to 100 visual analog scale (VAS) (MD -6.60, 95%CI -28.60 to 15.40; 7% absolute improvement), grip strength measured in kilograms of force (MD 0.10, 95% CI -0.16 to 0.36) and function ona 0 to 100 VAS (MD -1.80, 95% CI -0.18.64 to 15.04; 2% improvement), pain-free function index measured as the number of painfree items (MD 1.10, 95% CI -1.00 to 3.20) and functional status (RR 3.3, 95% CI 0.4 to 24.3) for deep transverse friction massage,and therapeutic ultrasound and placebo ointment compared with therapeutic ultrasound and placebo ointment only. Likewise for deep transverse friction massage and phonophoresis compared with phonophoresis alone, no statistically significant differences were found for pain (MD -1.2, 95% CI -20.24 to 17.84; 1% improvement), grip strength (MD -0.20, 95% CI -0.46 to 0.06) and function (MD3.70, 95% CI -14.13 to 21.53; 4% improvement). In addition, the GRADE (Grades of Recommendation, Assessment, Development and Evaluation) approach was used to evaluate the quality of evidence for the pain outcome, which received a score of "very low".Pain relief of 30% or greater, quality of life, patient global assessment, adverse events, and withdrawals due to adverse events were not assessed or rep

  20. Epigenesis of behavioural lateralization in humans and other animals

    PubMed Central

    Schaafsma, S.M.; Riedstra, B.J.; Pfannkuche, K.A.; Bouma, A.; Groothuis, T.G.G.

    2008-01-01

    Despite several decades of research, the epigenesis of behavioural and brain lateralization is still elusive, although its knowledge is important in understanding developmental plasticity, function and evolution of lateralization, and its relationship with developmental disorders. Over the last decades, it has become clear that behavioural lateralization is not restricted to humans, but a fundamental principle in the organization of behaviour in vertebrates. This has opened the possibility of extending descriptive studies on human lateralization with descriptive and experimental studies on other vertebrate species. In this review, we therefore explore the evidence for the role of genes and environment on behavioural lateralization in humans and other animals. First, we discuss the predominant genetic models for human handedness, and conclude that their explanatory power alone is not sufficient, leaving, together with ambiguous results from adoption studies and selection experiments in animals, ample opportunity for a role of environmental factors. Next, we discuss the potential influence of such factors, including perinatal asymmetrical perception induced by asymmetrical head position or parental care, and social modulation, both in humans and other vertebrates, presenting some evidence from our own work on the domestic chick. We conclude that both perinatal asymmetrical perception and later social modulation are likely candidates in influencing the degree or strength of lateralization in both humans and other vertebrates. However, in most cases unequivocal evidence for this is lacking and we will point out further avenues for research. PMID:19064352

  1. Resume and analysis of NACA lateral control research

    NASA Technical Reports Server (NTRS)

    Weick, F. E.; Jones, R. T.

    1976-01-01

    An analysis of the principal results of recent lateral control research is made. Two things are considered of primary importance in judging the effectiveness of different control devices: The (calculated) banking and yawing motion of a typical small airplane caused by a deflection of the control, and the stick force required to produce this deflection. The report includes a table in which a number of different lateral control devices are compared on these bases. Test flights demonstrated that satisfactory lateral control at high angles of attack depends as much on the retention of stability as on aileron effectiveness.

  2. Lateral Mass Fixation in the Subaxial Cervical Spine.

    PubMed

    Kurd, Mark F; Millhouse, Paul W; Schroeder, Gregory D; Kepler, Christopher K; Vaccaro, Alexander R

    2015-08-01

    The use of lateral mass screws and rods in the subaxial spine has become the standard method of fixation for posterior cervical spine fusions. Multiple techniques have been described for the placement of lateral mass screws, including the Magerl, the Anderson, and the An techniques. While these techniques are all slightly different, the overall goal is to obtain solid bony fixation while avoiding the neurovascular structures. The use of lateral mass screws has been shown to be a safe and effective technique for achieving a posterior cervical fusion. PMID:26049972

  3. 11. CONTINUATION OF LATERAL LEAVING THE DIVERSION STRUCTURE WEST OF ...

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

    11. CONTINUATION OF LATERAL LEAVING THE DIVERSION STRUCTURE WEST OF LOWER DERBY LAKE (SECTION 2), SHOWING MEASURING GAUGE. - Highline Canal, Sand Creek Lateral, Beginning at intersection of Peoria Street & Highline Canal in Arapahoe County (City of Aurora), Sand Creek lateral Extends 15 miles Northerly through Araphoe County, City & County of Denver, & Adams County to its end point, approximately 1/4 mile Southest of intersectioin of D Street & Ninth Avenue in Adams County (Rocky Mountain Arsenal, Commerce City Vicinity), Commerce City, Adams County, CO

  4. 1. HEAD GATE OF THE SAND CREEK LATERAL AT THE ...

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

    1. HEAD GATE OF THE SAND CREEK LATERAL AT THE HIGH LINE CANAL ON THE SOUTH END OF THE PEORIA STREET BRIDGE. - Highline Canal, Sand Creek Lateral, Beginning at intersection of Peoria Street & Highline Canal in Arapahoe County (City of Aurora), Sand Creek lateral Extends 15 miles Northerly through Araphoe County, City & County of Denver, & Adams County to its end point, approximately 1/4 mile Southest of intersectioin of D Street & Ninth Avenue in Adams County (Rocky Mountain Arsenal, Commerce City Vicinity), Commerce City, Adams County, CO

  5. 12. CONCRETE LINING ON A CURVING SEGMENT OF THE LATERAL ...

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

    12. CONCRETE LINING ON A CURVING SEGMENT OF THE LATERAL NEAR THE NORTHEAST END OF LAKE LADORA (SECTION 2). - Highline Canal, Sand Creek Lateral, Beginning at intersection of Peoria Street & Highline Canal in Arapahoe County (City of Aurora), Sand Creek lateral Extends 15 miles Northerly through Araphoe County, City & County of Denver, & Adams County to its end point, approximately 1/4 mile Southest of intersectioin of D Street & Ninth Avenue in Adams County (Rocky Mountain Arsenal, Commerce City Vicinity), Commerce City, Adams County, CO

  6. 30. NORTHERN SEGMENT OF THE LATERAL IN THE NORTHWEST QUARTER ...

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

    30. NORTHERN SEGMENT OF THE LATERAL IN THE NORTHWEST QUARTER OF SECTION 25 STRUCTURE PICTURED IN CO-43-A-28. - Highline Canal, Sand Creek Lateral, Beginning at intersection of Peoria Street & Highline Canal in Arapahoe County (City of Aurora), Sand Creek lateral Extends 15 miles Northerly through Araphoe County, City & County of Denver, & Adams County to its end point, approximately 1/4 mile Southest of intersectioin of D Street & Ninth Avenue in Adams County (Rocky Mountain Arsenal, Commerce City Vicinity), Commerce City, Adams County, CO

  7. [Extreme lateral lumbar intervertebral disk displacement. Incidence, symptoms and therapy].

    PubMed

    Ebeling, U; Mattle, H; Reulen, H J

    1990-04-01

    Upper lumbar nerve root compression or a femoralgia is often caused by extreme lateral lumbar disc herniation. This type of lumbar disc herniation compresses the nerve root inside or laterally to the intervertebral canal, while mediolateral disc herniations squeeze it in the lateral recess. Pain radiating obliquely over the thigh is the dominant clinical symptom. Bending the body to the ipsilateral side usually increases the pain. When neurologic signs are present, motor deficits tend to be more prominent than sensory and the deficits never affect more than one nerve root. Most frequently a weakness of knee extension occurs. PMID:2191229

  8. Thermodynamic and kinetic control of the lateral Si wire growth

    NASA Astrophysics Data System (ADS)

    Dedyulin, Sergey N.; Goncharova, Lyudmila V.

    2014-03-01

    Reproducible lateral Si wire growth has been realized on the Si (100) surface. In this paper, we present experimental evidence showing the unique role that carbon plays in initiating lateral growth of Si wires on a Si (100) substrate. Once initiated in the presence of ?5 ML of C, lateral growth can be achieved in the range of temperatures, T = 450-650 °C, and further controlled by the interplay of the flux of incoming Si atoms with the size and areal density of Au droplets. Critical thermodynamic and kinetic aspects of the growth are discussed in detail.

  9. 38. VIEW LOOKING SOUTH, LATERAL ELEVATION OF CARETAKER'S COTTAGE FROM ...

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

    38. VIEW LOOKING SOUTH, LATERAL ELEVATION OF CARETAKER'S COTTAGE FROM ENTRANCE HOUSE TERRACE (4' x 5' negative) - Fairmount Waterworks, East bank of Schuylkill River, Aquarium Drive, Philadelphia, Philadelphia County, PA

  10. 6. Tempe Crosscut Canal, looking west from Division Gates. Lateral ...

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

    6. Tempe Crosscut Canal, looking west from Division Gates. Lateral at left is for local delivery of irrigation water. Photographer: Mark Durben, February 1989. Source: SRPA - Tempe Canal, South Side Salt River in Tempe, Mesa & Phoenix, Tempe, Maricopa County, AZ

  11. Detail view, looking west from eastern pier, showing stringers, lateral ...

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

    Detail view, looking west from eastern pier, showing stringers, lateral bracing and turnbuckles. - Monongahela Railroad, New Geneva Bridge, Spanning Monongahela River, South of Lock & Dam No. 7, New Geneva, Fayette County, PA

  12. 22. TEMPORARY CENTRIFIGAL PUMP. NOTE CHAPMAN HYDRAULICOPERATED VALVE FOR LATER ...

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

    22. TEMPORARY CENTRIFIGAL PUMP. NOTE CHAPMAN HYDRAULIC-OPERATED VALVE FOR LATER CONNECTION OF ENGINE PUMP END TO DISCHARGE HEADER. - Lakeview Pumping Station, Clarendon & Montrose Avenues, Chicago, Cook County, IL

  13. 23. TEMPORARY CENTRIFUGAL PUMP. NOTE CHAPMAN HYDRAULICOPERATED VALVE FOR LATER ...

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

    23. TEMPORARY CENTRIFUGAL PUMP. NOTE CHAPMAN HYDRAULIC-OPERATED VALVE FOR LATER CONNECTION OF ENGINE PUMP ENG TO DISCHARGE HEADER. - Lakeview Pumping Station, Clarendon & Montrose Avenues, Chicago, Cook County, IL

  14. DETAIL OF ORIGINAL DOOR (LOUVERS ADDED LATER) ON THE SOUTH ...

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

    DETAIL OF ORIGINAL DOOR (LOUVERS ADDED LATER) ON THE SOUTH SIDE. VIEW FACING NORTH-NORTHWEST. - U.S. Naval Base, Pearl Harbor, Aviation Storehouse, Vincennes Avenue at Simms Street, Pearl City, Honolulu County, HI

  15. Economic viability of multiple-lateral horizontal wells 

    E-print Network

    Smith, Christopher Jason

    1995-01-01

    . It will focus on the application of multiple-lateral horizontal wells to reduce the risks of economic uncertainty associated with poor reservoir characterization in areally anisotropic reservoirs. Using a state-of-the-art productivity index model, the study...

  16. Simple Fuzzy control Structure for a Lateral Missile Control Problem

    Microsoft Academic Search

    Nabil Aouf; C. A. Rabbath; M. Lauzon

    2003-01-01

    The paper proposes a bank-to-turn lateral missile autopilot technique that is based on a simple fuzzy control structure. Numerical simulations demonstrate that the proposed approach provides satisfactory performance over the entire nonlinear missile flight envelope.

  17. Lateral width of shower image in the auger fluorescence detector

    SciTech Connect

    Barbosa, H.; de Souza, V.; Dobrigkeit, C.; Engel, R.; Gora, D.; Heck, D.; Homola, P.; Klages, H.; Medina-Tanco, G.; Ortiz, J.A.; Pekala, J.; Risse, M.; Wilczynska, B.; Wilczynski, H.

    2005-09-01

    The impact of the lateral distribution of light in extensive air showers on the detection and reconstruction of shower profiles is investigated for the Auger fluorescence telescopes. Based on three-dimensional simulations, the capability of the Auger telescopes to measure the lateral distribution of light is evaluated. The ability to infer the actual lateral distribution is confirmed by the comparison of detailed simulations with real data. The contribution of pixels located far from the axis of the shower image is calculated and the accepted signal is rescaled in order to reconstruct a correct shower profile. The analysis presented here shows that: (a) the Auger telescopes are able to observe the lateral distribution of showers and (b) the energy corrections to account for the signal in outlying pixels can exceed 10%, depending on shower geometry.

  18. Lateral width of shower image in the Auger fluorescence detector

    E-print Network

    H. Barbosa; V. de Souza; C. Dobrigkeit; R. Engel; D. Gora; D. Heck; P. Homola; H. Klages; G. Medina-Tanco; J. A. Ortiz; J. Pekala; M. Risse; B. Wilczynska; H. Wilczynski

    2005-09-16

    The impact of the lateral distribution of light in extensive air showers on the detection and reconstruction of shower profiles is investigated for the Auger fluorescence telescopes. Based on three-dimensional simulations, the capability of the Auger telescopes to measure the lateral distribution of light is evaluated. The ability to infer the actual lateral distribution is confirmed by the comparison of detailed simulations with real data. The contribution of pixels located far from the axis of the shower image is calculated and the accepted signal is rescaled in order to reconstruct a correct shower profile. The analysis presented here shows that: (a) the Auger telescopes are able to observe the lateral distribution of showers and (b) the energy corrections to account for the signal in outlying pixels can exceed 10%, depending on shower geometry.

  19. Extreme lateral lumbar disc herniation. Diagnosis and management.

    PubMed

    Perno, J R; Rossitch, E

    1993-05-01

    Extreme lateral disc herniation accounts for about 10% of lumbar disc ruptures and is more common in the elderly. Patients will frequently complain of pain in the groin and anterior thigh but little if any back pain. Because the L4 root is often involved, the physical exam often shows quadriceps weakness and a diminished patellar reflex. Other important signs include a negative Lasèque's sign and reproduction of pain with lateral bending of the back toward the involved extremity. Currently, CT or MRI are the diagnostic procedures of choice. The initial treatment for extreme lateral disc herniation is bed rest and NSAIDs with surgery if conservative therapy fails. Primary care physicians should consider extreme lateral disc herniation when they evaluate patients with low back and leg pain. PMID:8510777

  20. 31. Underside of tracks showing columns, concreteencased Ibeams, lateral bracing, ...

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

    31. Underside of tracks showing columns, concrete-encased I-beams, lateral bracing, and ramps. Looking south. - Stillwell Avenue Station, Intersection of Stillwell & Surf Avenues, Brooklyn, Kings County, NY

  1. Multimedia Systems Manuscript Nr. (will be inserted by hand later)

    E-print Network

    Eleftheriadis, Alexandros

    Multimedia Systems Manuscript Nr. (will be inserted by hand later) Silence detection for multimedia algorithms are required in order to maintain QoS. As an example, the large delay variation (jitter) that may

  2. 8. DETAIL VIEW, LOOKING NORTHEAST, SHOWING OUTRIGGERS FOR LATERAL BRACING ...

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

    8. DETAIL VIEW, LOOKING NORTHEAST, SHOWING OUTRIGGERS FOR LATERAL BRACING FOR TRUSSES AND BOTTOM CHORD CONNECTIONS. - White Bowstring Arch Truss Bridge, Spanning Yellow Creek at Cemetery Drive (Riverside Drive), Poland, Mahoning County, OH

  3. KEY PARAMETERS FOR PRECISE LATERAL DISPLACEMENT ESTIMATION IN ULTRASOUND ELASTOGRAPHY

    E-print Network

    Konofagou, Elisa E.

    of biological tissues [1]. This technique has been successfully applied to the diagnosis of breast lesions to equivalent expansion in the lateral (in plane, orthogonal) and elevational (out of plane, orthogonal

  4. FUNDAMENTAL ANALYSIS OF LATERAL DISPLACEMENT ESTIMATION QUALITY IN ULTRASOUND ELASTOGRAPHY

    E-print Network

    Konofagou, Elisa E.

    to the diagnosis of breast lesions and is currently clinically used [2]. Typically, only the axial displacement incompressible [3], i.e., the axial compression leads to expansion in the lateral and elevational directions

  5. Armadillo-related proteins promote lateral root development in Arabidopsis

    E-print Network

    Haseloff, Jim

    Armadillo-related proteins promote lateral root development in Arabidopsis Juliet C. Coates) Armadillo -catenin and related proteins have important func- tions during animal and Dictyostelium development, regulating cell differentiation, proliferation, and adhesion. Armadillo-repeat- containing

  6. 29. DECK / WEB / LATERAL BRACING DETAIL OF CANTILEVER ...

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

    29. DECK / WEB / LATERAL BRACING DETAIL OF CANTILEVER ARM OF THROUGH TRUSS. VIEW TO WEST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  7. Surgical anatomy of the minimally invasive lateral lumbar approach.

    PubMed

    Bina, Robert W; Zoccali, Carmine; Skoch, Jesse; Baaj, Ali A

    2015-03-01

    The lateral lumbar interbody fusion approach (LLIF), which encompasses the extreme lateral interbody fusion or direct lateral interbody fusion techniques, has gained popularity as an alternative to traditional posterior approaches. With rapidly expanding applications, this minimally invasive surgery (MIS) approach is now utilized in basic degenerative pathologies as well as complex lumbar degenerative deformities and tumors. Given the intimate relationship of the psoas muscle, and hence the lumbar plexus, to this MIS approach, several authors have examined the surgical anatomy of this approach. Understanding this regional neural anatomy is imperative given the potential for serious injuries to both the motor and sensory nerves of the lumbar plexus. In this review, we critically and comprehensively discuss all published studies detailing the surgical anatomy of the lateral lumbar approach with respect to the MIS LLIF techniques. This is a timely review given the rapidly growing number of surgeons utilizing this technique. PMID:25449209

  8. Archives, Records, and Information Management Specialization Fall 2013 and Later

    E-print Network

    Golbeck, Jennifer

    Archives, Records, and Information Management Specialization ­ Fall 2013 and Later Core Courses _____ LBSC 605 Archival Principles, Practices, and Programs _____ LBSC 631 Achieving Organization Excellence Designing Principled Inquiry MLS Required Course: _____ LBSC 703 Field Study in Archives, Records

  9. Electron tunneling and spin relaxation in a lateral quantum dot

    E-print Network

    Amasha, Sami

    2008-01-01

    We report measurements that use real-time charge sensing to probe a single-electron lateral quantum dot. The charge sensor is a quantum point contact (QPC) adjacent to the dot and the sensitivity is comparable to other ...

  10. Commanding lateral acceleration: a natural paradigm for automobile steering 

    E-print Network

    Kenny, Andrew

    1998-01-01

    and that commanding lateral acceleration is a natural way to steer a car. A1l test drivers preferred this system over joystick systems currently available to handicapped drivers which require the driver to command front wheel turn angle....

  11. On the importance of encapsulation environment for lateral gauges

    NASA Astrophysics Data System (ADS)

    Painter, Jonathan David; Appleby-Thomas, Gareth James; Hazell, Paul; Winter, Ron; Harris, Ernest Joseph; Owen, Gareth D.; Wood, David Christopher

    2012-03-01

    In principle, embedded wire-element lateral manganin pressure gauges allow the lateral component of stress during shock loading to be directly monitored. However, such gauges require target materials to be sectioned before insertion into an encapsulating MylarTM/epoxy layer, leading to debate over their analysis. In particular, recent computational modelling has suggested that, amongst other factors, gauge response may be linked to the nature of material flow within the encapsulation under shock loading. Here, this phenomenon was experimentally and computationally investigated by variation of the geometric environment of embedded lateral T-gauges (Vishay Micro-Measurements® type J2M-SS-580SF-025) in Tantalum (Ta) targets. In particular, inclusion of high impedance backing plates allowed restriction of encapsulation material flow under shock. Subsequent comparison to hydrocode simulations provided additional insights into lateral gauge interpretation.

  12. PHOTO OPTION CURRICULUM (FOR STUDENTS ENTERING FALL, 2011 OR LATER)

    E-print Network

    Dyer, Bill

    PHOTO OPTION CURRICULUM (FOR STUDENTS ENTERING FALL, 2011 OR LATER) NOTE ON REVERSE. GATE REQUIREMENTS FOR PHOTO OPTION: FILM 100IH ­ Introduction to Film)..................................................................3 PHOTO OPTION REQUIREMENTS (GATE REQUIRED FOR MOST COURSES): PHOT 255

  13. Poor Health as Teen, Poor Job Prospects Later, Study Suggests

    MedlinePLUS

    Poor Health as Teen, Poor Job Prospects Later, Study Suggests Chronic mental or physical problems were tied to worse education, employment goals in ... News) -- Mental or physical health problems during the teen years may make it harder to get a ...

  14. 20. WEB / DECK / LATERAL BRACING DETAIL OF THROUGH ...

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

    20. WEB / DECK / LATERAL BRACING DETAIL OF THROUGH TRUSSES. VIEW TO WEST. - Abraham Lincoln Memorial Bridge, Spanning Missouri River on Highway 30 between Nebraska & Iowa, Blair, Washington County, NE

  15. 14. VIEW OF BOTTOM LATERAL BRACING WITH STRINGERS AND FLOOR ...

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

    14. VIEW OF BOTTOM LATERAL BRACING WITH STRINGERS AND FLOOR BEAMS, NORTHWEST SPAN, LOOKING NORTHWEST - Linden Avenue Bridge, Spanning Purgatoire River on Linden Avenue, Trinidad, Las Animas County, CO

  16. 11. VIEW OF SOUTH BRIDGE PIER, BOTTOM LATERAL BRACING, LOWER ...

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

    11. VIEW OF SOUTH BRIDGE PIER, BOTTOM LATERAL BRACING, LOWER CHORD, STRINGERS, END POST AND BEARING SEAT; FACING SOUTHEAST. - Walker Bridge, Spanning Klamath River and connecting Highway 96 and Walker Road, Klamath River, Siskiyou County, CA

  17. How important is lateral masking in visual search?

    PubMed

    Wertheim, A H; Hooge, I T C; Krikke, K; Johnson, A

    2006-04-01

    Five experiments are presented, providing empirical support of the hypothesis that the sensory phenomenon of lateral masking may explain many well-known visual search phenomena that are commonly assumed to be governed by cognitive attentional mechanisms. Experiment I showed that when the same visual arrays are used in visual search and in lateral masking experiments, the factors (1) number of distractors, (2) distractor density, and (3) search type (conjunction vs disjunction) have the same effect on search times as they have on lateral masking scores. Experiment II showed that when the number of distractors and eccentricity is kept constant in a search task, the effect of reducing density (which reduces the lateral masking potential of distractors on the target) is to strongly reduce the disjunction-conjunction difference. In experiment III, the lateral masking potential of distractors on a target was measured with arrays that typically yield asymmetric search times in visual search studies (a Q among Os vs. an O among Qs). The lateral masking scores showed the same asymmetry. Experiment IV was a visual search study with such asymmetric search arrays in which the number of distractors and eccentricity was kept constant, while manipulating density. Reducing density (i.e., reducing lateral masking) produced a strong reduction of the asymmetry effect. Finally in experiment V, we showed that the data from experiment IV cannot be explained due to a difference between a fine and a coarse grain attentional mechanism. Taken together with eye movement data and error scores from experiment II and with similar findings from the literature, these results suggest that the sensory mechanism of lateral masking could well be a very important (if not the main) factor causing many of the well-known effects that are traditionally attributed to higher level cognitive or attentional mechanisms in visual search. PMID:16328267

  18. How important is lateral masking in visual search?

    Microsoft Academic Search

    A. H. Wertheim; I. T. C. Hooge; K. Krikke; A. Johnson

    2006-01-01

    Five experiments are presented, providing empirical support of the hypothesis that the sensory phenomenon of lateral masking\\u000a may explain many well-known visual search phenomena that are commonly assumed to be governed by cognitive attentional mechanisms.\\u000a Experiment I showed that when the same visual arrays are used in visual search and in lateral masking experiments, the factors\\u000a (1) number of distractors,

  19. Vehicle Lateral Control and Yaw Stability Control through Differential Braking

    Microsoft Academic Search

    Chenming Zhao; Weidong Xiang; P. Richardson

    2006-01-01

    This paper examines the effectiveness of a brake-by-wire system with the uses of differential brake torque for lateral control and yaw stability control in the context of intelligent vehicle highway systems. Differential braking easily realized by the brake-by-wire system can generate the vehicle yaw moment. The resulting yaw moment affects vehicle lateral position and yaw rate, thereby providing a limited

  20. Large Lateral Photovoltaic Effect in Metal-(Oxide-) Semiconductor Structures

    PubMed Central

    Yu, Chongqi; Wang, Hui

    2010-01-01

    The lateral photovoltaic effect (LPE) can be used in position-sensitive detectors to detect very small displacements due to its output of lateral photovoltage changing linearly with light spot position. In this review, we will summarize some of our recent works regarding LPE in metal-semiconductor and metal-oxide-semiconductor structures, and give a theoretical model of LPE in these two structures. PMID:22163463

  1. Discoid lateral meniscus: diagnosis and results of arthroscopic treatment

    Microsoft Academic Search

    Mehmet Asik; Cengiz Sen; Omer F. Taser; Aziz K. Alturfan; Yunus V. Sozen

    2003-01-01

    We evaluated the results of arthroscopic meniscectomy in patients with discoid lateral menisci of the knee. Discoid lateral menisci were detected in 308 patients, of whom 197 (124 males, 73 females; mean age 34.5 years, range 6-67) were clinically, radiologically, and arthroscopically found to be symptomatic and underwent partial meniscectomy. The average period between injury and operation was 13.2 months

  2. Driving Capability by Lateral BJT-CMOS Inverter

    Microsoft Academic Search

    Toshiro Akino

    A new mode of operation for a gated lateral BJT (Bipolar Junction Transistor) on SOI (Silicon-On-Insulator) is investigated. A partially depleted n-channel MOSFET with four terminals inherently includes a lateral npn BJT with three terminals. We propose such a pulsed current scheme to this p-type base terminal that enhances the driving capability by using the high collector current conduction when

  3. Lateral transpsoas lumbar interbody fusion: outcomes and deformity correction.

    PubMed

    Dahdaleh, Nader S; Smith, Zachary A; Snyder, Laura A; Graham, Randall B; Fessler, Richard G; Koski, Tyler R

    2014-04-01

    The lateral transpsoas approach for interbody fusion is a minimally invasive technique that has been gaining increasing popularity in the management of a variety of spinal degenerative disorders. Recently, there has been increasing utilization of this technique in the management of adult deformity. The authors present a review of the current evidence of using the lateral lumbar transpsoas approach in the correction of adult degenerative scoliosis. PMID:24703453

  4. Calculation of the lateral-dynamic stability of aircraft

    NASA Technical Reports Server (NTRS)

    Raikh, A

    1952-01-01

    Graphs and formulas are given with the aid of which all the aerodynamic coefficients required for computing the lateral dynamic stability can be determined. A number of numerical examples are given for obtaining the stability derivatives and solving the characteristic-stability equation. Approximate formulas are derived with the aid of which rapid preliminary computations may be made and the stability coefficients corrected for certain modifications of the airplane. A derivation of the lateral-dynamic-stability equations is included.

  5. Masticatory laterality--evaluation and influence of food texture.

    PubMed

    Mizumori, T; Tsubakimoto, T; Iwasaki, M; Nakamura, T

    2003-10-01

    The purpose of this study is the objective and quantitative evaluation of masticatory laterality and its daily variability. Various foods with different textures were used to investigate whether food texture influenced masticatory laterality. Ten healthy subjects and seven foods were used. Recordings of chewing movements were repeated three times at intervals of 1 week. Masticatory laterality was assessed with an Asymmetry Index [AI: (number of right side strokes - number of left side strokes)/number of total strokes]. Medians and ranges of the three recordings were calculated. The observed AI ranges in the three trials were limited with the exception of two subjects. Among the other subjects, averages of the absolute values of the medians were from 32.5 to 73.4%. Statistically significant differences between the hardest food and softer foods were observed in absolute value of AI medians. Masticatory laterality could be evaluated by an AI. Eight of 10 subjects showed limited ranges of AI in three recordings. It should be noted that a few people actually chew on either side but might chew on one side only on a particular day. Hard food evoked more masticatory laterality, and seemed more appropriate for laterality examinations. PMID:12974859

  6. Extra-articular Mimickers of Lateral Meniscal Tears

    PubMed Central

    Barker, Joseph U.; Strauss, Eric J.; Lodha, Sameer; Bach, Bernard R.

    2011-01-01

    Context: Lateral meniscus tears are a common entity seen in sports medicine. Although lateral-side knee pain is often the result of a meniscus injury, several extra-articular pathologies share signs and symptoms with a meniscus tear. It is critical for the clinician to be able to identify and understand extra-articular pathologies that can present similar to a lateral meniscus tear. Evidence Acquisition: Data were collected through a thorough review of the literature conducted through a MEDLINE search for all relevant articles between 1980 and February 2010. Study Type: Clinical review. Results: Common extra-articular pathologies that can mimic lateral meniscal tears include iliotibial band syndrome, proximal tibiofibular joint instability, snapping biceps femoris or popliteus tendons, and peroneal nerve compression syndrome or neuritis. The patient history, physical examination features, and radiographic findings can be used to separate these entities from the more common intra-articular knee pathologies. Conclusions: In treating patients who present with lateral-sided knee pain, clinicians should be able to recognize and treat extra-articular pathologies that can present in a similar fashion as lateral meniscus tears. PMID:23015995

  7. Lateral line diversity among ecologically divergent threespine stickleback populations

    PubMed Central

    Wark, A. R.; Peichel, C. L.

    2010-01-01

    The lateral line is a mechanoreceptive sensory system that allows fish to sense objects and motion in their local environment. Variation in lateral line morphology may allow fish in different habitats to differentially sense and respond to salient cues. Threespine sticklebacks (Gasterosteus aculeatus) occupy a diverse range of aquatic habitats; we therefore hypothesized that populations within the G. aculeatus species complex might show variation in the morphology of the lateral line sensory system. We sampled 16 threespine stickleback populations from marine, stream and lake (including benthic and limnetic) habitats and examined the distribution, type and number of neuromasts on different regions of the body. We found that the threespine stickleback has a reduced lateral line canal system, completely lacking canal neuromasts. Although the arrangement of lines of superficial neuromasts on the body was largely the same in all populations, the number of neuromasts within these lines varied across individuals, populations and habitats. In pairwise comparisons between threespine sticklebacks adapted to divergent habitats, we found significant differences in neuromast number. Stream residents had more neuromasts than marine sticklebacks living downstream in the same watershed. In two independent lakes, benthic sticklebacks had more trunk neuromasts than sympatric limnetic sticklebacks, providing evidence for parallel evolution of the lateral line system. Our data provide the first demonstration that the lateral line sensory system can vary significantly between individuals and among populations within a single species, and suggest that this sensory system may experience different selection regimes in alternative habitats. PMID:20008367

  8. Laterality Influences Schooling Position in Rainbowfish, Melanotaenia spp

    PubMed Central

    Bibost, Anne-Laurence; Brown, Culum

    2013-01-01

    Cerebral lateralization is a widespread trait among animals, is often manifested as side biases in behaviour (laterality) and has been suggested to provide fitness benefits. Here we examined the influence of laterality on the organisation of fish schools using rainbowfish (Melanotaenia spp) as model species. The pattern and strength of laterality for each individual was determined by examining eye preferences whilst examining their reflection in a mirror. Schools of four fish of known laterality were then created and the preferred position for each fish within the school was repeatedly observed in a flume. Fish which showed right eye preferences in the mirror test preferentially adopted a position on the left side of the school. Conversely, fish that showed left eye preferences in the mirror test or where non-lateralised preferentially adopted a position slightly to the right side of the school. However, this general pattern varied depending on the species and sex of the school. Our results strongly implicate individual laterality in the geometry of school formation. PMID:24260506

  9. Lateral Femoral Epicondylar Osteotomy: An Extensile Posterolateral Knee Approach

    PubMed Central

    Bowers, Andrea L.

    2008-01-01

    Open exposure of the posterolateral corner of the knee is challenged by limitations of posterolateral ligamentous tissues and posterior neurovascular structures. We have used a modification of a lateral femoral epicondyle osteotomy, described historically for surgical management of posterolateral rotatory instability, as an approach to the posterolateral intraarticular structures. The historic technique for ligamentous reconstruction has been abandoned because its nonanatomic fixation does not restore ligamentous isometry. In this report, osteotomy of a bone block from the lateral femoral epicondyle is used to access the joint space. The lateral collateral ligament is reflected distally and posteriorly through traction on the block. Once the intraarticular disorder has been addressed, the lateral femoral epicondyle is secured in its native, anatomic position, thereby restoring isometry and normal joint mechanics after surgery. This technique has been used successfully to address posterolateral articular disorders on femoral and tibial sides. Postoperative magnetic resonance imaging verified restoration of lateral collateral ligament anatomy. Physical examination at 0° and 30° knee flexion showed clinical stability at all postoperative evaluations through 6 and 10 months followup. Using this technique, intraarticular disorders at the posterolateral corner may be addressed in an open manner with anatomic reduction and preserved postoperative function of the lateral collateral ligament. Level of Evidence: Level V, expert opinion. See the Guidelines for Authors for a complete description of levels of evidence. PMID:18373126

  10. Dynamics Study on Morphological Stabilities of Cellular Crystal Lateral Wall

    NASA Astrophysics Data System (ADS)

    Chang, Guowei; Chen, Shuying; Li, Qingchun; Yue, Xudong; Jin, Guangcan

    2012-06-01

    The lateral wall stabilities during the growing process of cellular crystal in the melt were studied in this article. The dynamics equation of cylindrical solid-liquid interface morphological stabilities in melt was first derived, and then the expression of criterion for cylindrical solid-liquid interface morphological stabilities was defined. The effect of the shape factor, solid radius, and other relevant factors on the morphological stabilities was analyzed. Also, the critical shape factor and critical growth rate for keeping the stabilities of the interface were determined. The phenomenon during the lateral growth process of ?-phase cellular crystal in carbon steel was observed under a high-temperature confocal scanning laser microscope (HTCSLM), which was used to verify the theoretical analysis and calculated results. The results indicate that the shape factor is beneficial to improving the stabilities of the cellular crystal lateral wall. During the increase process of the cellular crystal radius, however, there is a certain value of the cellular crystal radius, which induces the shape factor to reduce stabilities of the cellular crystal lateral wall rapidly. Even if the other conditions are unchanged, the shape of the cellular crystal may also cause the cellular crystal lateral wall to lose its stabilities. There are two critical growth rates to keep the cellular crystal lateral wall growing stably under the conditions of this research. For the Fe-0.15 pct C-0.8 pct Mn alloy, these two critical growth rates are 10-4 and 10 cm/s orders of magnitude, respectively. The difference between them is more than 105 times, so the slow critical growth rate conforms to the actual critical growth rate. The radius of the cellular crystal is the main influencing factor of lateral wall stabilities. The bigger the radius of the cellular crystal is, the worse the stabilities of the lateral wall are. That is also one of the reasons that the fine cellular crystal can survive during a certain period. The results of the theoretical analysis about stabilities of the cellular crystal lateral wall agree well with the lateral growth phenomena of ? phase cellular crystal in carbon steel observed by a HTCSLM. The theoretically calculated results of the radial critical growth rates are coincident with the experimental results.

  11. Lateral mass fixation in subaxial cervical spine: anatomic review.

    PubMed

    Mohamed, Elrahmany; Ihab, Zidan; Moaz, Anwar; Ayman, Nabawi; Haitham, Abo-Elw

    2012-03-01

    Introduction?The cervical spine is a highly mobile segment of the spinal column, liable to a variety of diseases and susceptible to trauma. It is a complex region where many vital structures lie in close proximity. Lateral mass screw fixation has become the method of choice in stabilizing subaxial cervical spine among other posterior cervical fixation techniques whenever the posterior elements are absent or compromised. Objective?This study examined cervical specimens of cadavers and cervical computed tomography (CT) scans to minimize as much as possible complications of cervical lateral mass screw placement such as vertebral artery or nerve root injuries, facet joint violations, or inadequate placement. Methods?Forty normal cervical CT scans, obtained from the emergency unit as part of the trauma workup, were included in this study plus 10 cervical cadaveric specimens obtained from the Alexandria Neuro-anatomy laboratory. There were three fixed parameters for screw insertion in this study. First, the point of screw insertion was the midpoint of the lateral mass; it was the crossing point between the sagittal and axial planes of the posterior cortex of the lateral mass. Second, the direction of the screw in the craniocaudal plane was 30 degrees cranially to avoid facet joint penetration. Third, the exit point of the screw was located on the ventral cortex of the lateral mass just lateral to the root of the transverse process in the midaxial cut of each lateral mass, to make a sound bicortical fixation without injuring the vertebral artery or the nerve root. The selected screw trajectory in this study was the line drawn between the inlet and exit points. The depth and width of the lateral mass of the cervical vertebrae from C3 to C7 were measured as well as the angle of screw trajectory from the sagittal plane. All these measures were applied on the cadaveric specimens to make sure that no injury to the vertebral artery, nerve root, or facet joint occurred. Results?As regards the collected measurements of the lateral mass of all subaxial cervical vertebrae, the study revealed that the average depth of the lateral mass was 12.83?±?1.28 mm. The average width of the lateral mass was 11.92?±?0.96 mm. The average divergent angle of bicortical screw insertion without injury to the vertebral artery or the nerve root was 19.51?±?1.83 degrees. As regard the cadaveric specimens, based on all the collected measurements taken from the CT scans, there was no reported injury to the vertebral arteries or nerve roots or penetration to the facet joints. Conclusion?Lateral mass fixation can be applied easily and safely for all levels of subaxial cervical spine from C3 to C6 with the following parameters: (1) the point of entry is the midpoint of the lateral mass; (2) the screw trajectory is directed 30 degrees cranially and 20 degrees laterally; (3) the screw length is 13 to 15 mm. PMID:24353945

  12. Detection and Correction of Laterality Errors in Radiology Reports.

    PubMed

    Lee, Young Han; Yang, Jaemoon; Suh, Jin-Suck

    2015-08-01

    The objectives of the study are to introduce the development of supervising software for double-checking of laterality error in radiology reports and to evaluate the usefulness of detection and correction software by applying it to radiology report systems. An AutoHotkey macro program was applied to the design for double-checking of laterality errors. The software was performed according to the flowchart below: (1) detecting laterality discrepancies between radiologic examination names and the context of the radiology report and (2) providing conditioned discrepancy correction with a pop-up window. The accuracy of the detection was evaluated with 300 radiologic examinations that include the intended discrepancies and concordance of lateralities. The number of detections and corrections were quantified, and the confidence intervals were calculated for accuracy. We also applied this module to previous radiology reports with laterality errors from the radiologic examination database to validate the module. The AutoHotkey-scripted macro program functioned well in the reading workstation, and it was acted successfully as additional software. The detection accuracy was 99.67 % (95 % CI; 99.01-%) in the 300 radiologic examinations from the radiologic reading session. There was one running failure, caused by a temporary lag in the hospital's computer network, but no failures resulted during the second trial. We found that there were laterality errors in 0.048 % (n?=?14/29,257) of the examinations from the database. We developed detection and correction software aimed at double-checking for laterality errors. This method can be successfully adopted in any hospital software and is expected to be included for a better radiologic reading environment. PMID:25712502

  13. Effects of lateralized cues on the processing of lateralized auditory stimuli.

    PubMed

    Schröger, E; Eimer, M

    1996-06-28

    We examined the influence of auditory spatial cues on the processing of subsequently presented lateralized auditory target stimuli. In three experiments, effects of the position of the cue on event-related potentials (ERPs) and reaction times (RTs) to the target, which could occur at the same or at a different position to the cue, were examined. In Experiments I and II, stimulus-pairs were delivered via loudspeakers 13 degrees to the right or left of fixation. The cue was task-irrelevant in the sense that it never required a response, whereas the target was task-relevant. In Experiment I, the cue was not informative about the position of the succeeding target, that is, the target was presented at the same or at a different position to the cue with equal probability. In Experiment II, the cue predicted a target with high validity, occurring at the position opposite to the cue. In both experiments, the ERPs to targets presented at the same position as the preceding cue were negatively modulated compared with the ERPs to targets presented at a different position. This negative difference (Nd) between the ERPs to same and different position stimuli occurring between 200-300 ms relative to target onset was also obtained in situations where no overt behavior was required. Effects of cue position on RTs to the target were only observed in Experiment II, being shorter for validly predicted targets. These Nd effects either reflect refractoriness of location-specific exogeneous ERP components or involuntary attentional selection. In order to decide between these alternatives, a third experiment was performed, in which stimulus-pairs were presented via headphones to the left and right ear in attend and ignore condition. An Nd effect was obtained in the attend condition only. The absence of Nd effects in the ignore condition suggests that the Nd obtained in attend condition cannot completely be explained by refractoriness of exogeneous ERP components and thus reflects attentional processes. PMID:8831955

  14. Construcción y deconstrucción territorial del Caribe Colombiano durante el siglo XIX

    Microsoft Academic Search

    Camilo Domínguez; Jeffer Chaparro Mendivelso; Carla Gómez

    2007-01-01

    El proceso de estructuración territorial del Caribe Granadino durante el siglo XIX, específicamente de 1810 a 1886, se aborda desde una perspectiva geohistórica y geopolítica. Se parte de la base ambiental de la región, para luego abordar la evolución de los límites administrativos mediante reconstrucciones cartográficas basadas en mapas históricos. El proceso de cambio abarcó los antiguos estados de Magdalena

  15. Consejo Social Principales acuerdos de las sesiones del pleno del Consejo Social durante el curso

    E-print Network

    Oro, Daniel

    Consejo Social Principales acuerdos de las sesiones del pleno del Consejo Social durante el curso del curso 2011-12. Ratificación del acuerdo de la Comisión Permanente sobre premios de investigación para estudiantes de segundo curso de bachillerato y de segundo curso de ciclos for- mativos de grado

  16. When is personal data not “personal data” – The impact of Durant v. FSA

    Microsoft Academic Search

    Usha Jagessar; Vicky Sedgwick

    2005-01-01

    The Data Protection Act 1998 (the “Act”), which implements the EU Data Protection Directive (95\\/46\\/EC), applies to personal data and governs the activities of data controllers and data processors in relation to such data. In Michael John Durant v. Financial Services Authority (2003), the scope of the Act was restricted. In particular, key provisions, including “personal data” and “relevant filing

  17. Efeito do tipo de elemento de rosca na degradação de polipropileno durante múltiplas extrusões

    Microsoft Academic Search

    Ana Clélia Babetto; Sebastião V. Canevarolo

    2000-01-01

    Resumo: A configuração da rosca de uma extrusora de dupla rosca modular pode ser projetada com vários tipos de elementos de condução e mistura, produzindo diferentes níveis de degradação no polímero fundido. Neste trabalho determinou-se o nível de degradação do polipropileno durante múltiplas extrusões em várias configurações de rosca, através de cromatografia por exclusão de tamanho e espectroscopia de infravermelho.

  18. River Elongation as a Proxy for Lateral Channel Activity

    NASA Astrophysics Data System (ADS)

    Lauer, J. W.

    2009-12-01

    Lateral channel movement is a process that is tightly linked to both channel hydraulics and sediment transport, strongly influences floodplain ecology, and also has great relevance for banktop property owners. The correlation between channel migration rate and channel curvature usually causes meandering river channels to elongate as they migrate laterally. Over the long term, the increase in sinuosity is compensated by a rapid decrease in sinuosity where and when river bends shorten through cutoff processes. However, the elongation for most meander bends in systems free to migrate across wide floodplains often occurs relatively uniformly throughout the system. Consequently, the rate of elongation of individual river bends, integrated across a river reach, offers a simple mechanism for characterizing the reach’s lateral activity. Spatial series of accumulated elongation can also be used to delineate reaches with similar properties. We use aerial imagery pairs to compare rates of lateral channel centerline shifting with channel centerline elongation for reaches many bends long along eight different rivers with widths ranging from 12 to 584 m. Except where bends translate downstream without changing form, elongation rates are closely linked to lateral shifting. In several cases, a change in elongation rate corresponds closely with a change in channel width, discharge, and/or bed material. For reaches free to migrate across a wide, unconfined floodplain and where lateral migration measurements are likely of high quality, the average ratio between the reach average migration rate normalized by channel width and the rate of sinuosity increase (excluding bends that experienced a cutoff between imagery dates) is approximately 5.6. Since elongation rate measurements can be made accurately even from photos that are poorly aligned, the relationship between sinuosity increase and lateral migration potentially provides a means of bypassing time-consuming georeferencing, allowing immediate use of any set of adequately scaled historical photography for estimating lateral channel activity. It may also allow measurements of lateral activity over very short time periods of several years, rather than the typical decadal timescale, or from relatively low resolution imagery.

  19. Stabilization control of a hovering model insect: lateral motion

    NASA Astrophysics Data System (ADS)

    Zhang, Yan-Lai; Sun, Mao

    2011-10-01

    Our previous study shows that the lateral disturbance motion of a model drone fly does not have inherent stability (passive stability), because of the existence of an unstable divergence mode. But drone flies are observed to fly stably. Constantly active control must be applied to stabilize the flight. In this study, we investigate the lateral stabilization control of the model drone fly. The method of computational fluid dynamics is used to compute the lateral control derivatives and the techniques of eigenvalue and eigenvector analysis and modal decomposition are used for solving the equations of motion. Controllability analysis shows that although inherently unstable, the lateral disturbance motion is controllable. By feeding back the state variables (i.e. lateral translation velocity, yaw rate, roll rate and roll angle, which can be measured by the sensory system of the insect) to produce anti-symmetrical changes in stroke amplitude and/or in angle of attack between the left and right wings, the motion can be stabilized, explaining why the drone flies can fly stably even if the flight is passively unstable.

  20. Cerebral Lateralization is Protective in the Very Prematurely Born.

    PubMed

    Scheinost, Dustin; Lacadie, Cheryl; Vohr, Betty R; Schneider, Karen C; Papademetris, Xenophon; Constable, R Todd; Ment, Laura R

    2015-07-01

    Individuals born prematurely are at risk for developmental delay, and converging data suggest alterations in neural networks in the developing preterm brain. Nevertheless, those critical period processes such as cerebral lateralization that underlie these findings remain largely unexplored. To test the hypothesis that preterm birth alters the fundamental program of corticogenesis in the developing brain, we interrogated cerebral lateralization at rest in very prematurely born participants and term controls at young adulthood. Employing a novel, voxel-based measure of functional connectivity, these data demonstrate for the first time that cerebral lateralization of functional connectivity in right hemisphere language homologs is altered for very preterm participants. Very preterm participants with no evidence for severe brain injury exhibited a significant decrease in right hemisphere lateralization in the right parietal and temporal lobes in this data driven analysis. Further, for the very preterm participants, but not the term participants, these fundamental alterations in the cerebral lateralization for language significantly correlate with language scores. These findings provide evidence that cerebral asymmetry is both plastic and experiential, and suggest the need for further study of underlying environmental factors responsible for these changes. PMID:24451659

  1. Development of automobile tyre lateral runout measurement sensor

    NASA Astrophysics Data System (ADS)

    Ma, Xie; Ye, Lingjian; Yao, Guanghui; Wang, Di; Zhi, Xiongfei

    2013-10-01

    Automobile tyre lateral runout is one of the important indexes to measure the quality of the tyre, it will affect the safety of the automobile in moving. This paper introduces a sensor for automobile tyre lateral runout measurement. The variation of the automobile tyre lateral runout causes the change of guide rod probe displacement and deforms of the cantilever beam which connects with the guide bar. The deformation of the cantilever beam leads to the change of the resistance value of strain gauge which is pasted on the cantilever beam. Through measuring circuit, the resistance value of the strain gauge is converted into output voltage that has a certain relationship with automobile tyre lateral runout. Then, the voltage signal is transformed by A/D convertor and send to SCM to process and display the value of runout. Meanwhile, SCM output control signal to control the actuator and adjust the equipment running status in real time so as to ensure the tyre lateral runout is within the allowed range.

  2. Embryonic exposure to predator odour modulates visual lateralization in cuttlefish

    PubMed Central

    Jozet-Alves, Christelle; Hébert, Marie

    2013-01-01

    Predation pressure acts on the behaviour and morphology of prey species. In fish, the degree of lateralization varies between high- and low-predation populations. While lateralization appears to be widespread in invertebrates, we do not know whether heredity and early experience interact during development as in vertebrates. Here we show, for the first time, that an exposure to predator odour prior to hatching modulates visual lateralization in newly hatched cuttlefish. Only cuttlefish that have been exposed to predator odour display a left-turning bias when tested with blank seawater in a T-shaped apparatus. Exposure to predator odour all the incubation long could appear as an acute predictor of a high-predation surrounding environment. In addition, cuttlefish of all groups display a left-turning preference when tested with predator odour in the apparatus. This suggests the ability of cuttlefish to innately recognize predator odour. To our knowledge, this is the first clear demonstration that lateralization is vulnerable to ecological challenges encountered during embryonic life, and that environmental stimulation of the embryo through the olfactory system could influence the development of subsequent visual lateralization. PMID:23235708

  3. Embryonic exposure to predator odour modulates visual lateralization in cuttlefish.

    PubMed

    Jozet-Alves, Christelle; Hébert, Marie

    2013-02-01

    Predation pressure acts on the behaviour and morphology of prey species. In fish, the degree of lateralization varies between high- and low-predation populations. While lateralization appears to be widespread in invertebrates, we do not know whether heredity and early experience interact during development as in vertebrates. Here we show, for the first time, that an exposure to predator odour prior to hatching modulates visual lateralization in newly hatched cuttlefish. Only cuttlefish that have been exposed to predator odour display a left-turning bias when tested with blank seawater in a T-shaped apparatus. Exposure to predator odour all the incubation long could appear as an acute predictor of a high-predation surrounding environment. In addition, cuttlefish of all groups display a left-turning preference when tested with predator odour in the apparatus. This suggests the ability of cuttlefish to innately recognize predator odour. To our knowledge, this is the first clear demonstration that lateralization is vulnerable to ecological challenges encountered during embryonic life, and that environmental stimulation of the embryo through the olfactory system could influence the development of subsequent visual lateralization. PMID:23235708

  4. Lateral position detection and control for friction stir systems

    DOEpatents

    Fleming, Paul (Boulder, CO); Lammlein, David (Houston, TX); Cook, George E. (Brentwood, TN); Wilkes, Don Mitchell (Nashville, TN); Strauss, Alvin M. (Nashville, TN); Delapp, David (Ashland City, TN); Hartman, Daniel A. (Santa Fe, NM)

    2010-12-14

    A friction stir system for processing at least a first workpiece includes a spindle actuator coupled to a rotary tool comprising a rotating member for contacting and processing the first workpiece. A detection system is provided for obtaining information related to a lateral alignment of the rotating member. The detection system comprises at least one sensor for measuring a force experienced by the rotary tool or a parameter related to the force experienced by the rotary tool during processing, wherein the sensor provides sensor signals. A signal processing system is coupled to receive and analyze the sensor signals and determine a lateral alignment of the rotating member relative to a selected lateral position, a selected path, or a direction to decrease a lateral distance relative to the selected lateral position or selected path. In one embodiment, the friction stir system can be embodied as a closed loop tracking system, such as a robot-based tracked friction stir welding (FSW) or friction stir processing (FSP) system.

  5. Alcohol and lateral inhibitory interactions in human vision.

    PubMed

    Johnston, Kevin; Timney, Brian

    2013-01-01

    Acute alcohol consumption detrimentally affects many aspects of visual function, but few studies have addressed the neural mechanisms underlying such changes. One candidate mechanism that may be responsible for some alcohol-induced changes in visual function is lateral inhibition. Alcohol has been shown to abolish lateral inhibitory interactions in experimental preparations in which it is applied directly to the retina, but few studies have attempted to link alcohol-induced reductions in lateral inhibitory interactions with psychophysical performance in assessments of visual function dependent on this mechanism. In the present series of studies we addressed this by investigating the effects of alcohol consumption on a perceptual phenomenon mediated in part by lateral inhibition, the Hermann grid illusion. Participants estimated the contrast of the illusory blobs present at the grid intersections using a matching procedure after consumption of a drink containing alcohol or a nonalcoholic drink. The magnitude of the illusion was diminished in the alcohol condition, and this effect was consistent when we parametrically varied the contrast of the grid squares and widths of the grid bars. These data suggest that alcohol reduces lateral inhibitory interactions in human vision. PMID:24649633

  6. Lateral gene transfer in Mycobacterium avium subspecies paratuberculosis.

    PubMed

    Marri, Pradeep Reddy; Bannantine, John P; Paustian, Michael L; Golding, G Brian

    2006-06-01

    Lateral gene transfer is an integral part of genome evolution in most bacteria. Bacteria can readily change the contents of their genomes to increase adaptability to ever-changing surroundings and to generate evolutionary novelty. Here, we report instances of lateral gene transfer in Mycobacterium avium subsp. paratuberculosis, a pathogenic bacteria that causes Johne's disease in cattle. A set of 275 genes are identified that are likely to have been recently acquired by lateral gene transfer. The analysis indicated that 53 of the 275 genes were acquired after the divergence of M. avium subsp. paratuberculosis from M. avium subsp. avium, whereas the remaining 222 genes were possibly acquired by a common ancestor of M. avium subsp. paratuberculosis and M. avium subsp. avium after its divergence from the ancestor of M. tuberculosis complex. Many of the acquired genes were from proteobacteria or soil dwelling actinobacteria. Prominent among the predicted laterally transferred genes is the gene rsbR, a possible regulator of sigma factor, and the genes designated MAP3614 and MAP3757, which are similar to genes in eukaryotes. The results of this study suggest that like most other bacteria, lateral gene transfers seem to be a common feature in M. avium subsp. paratuberculosis and that the proteobacteria contribute most of these genetic exchanges. PMID:16788724

  7. Experiment and Simulation of the Lateral Gauge in Glass Targets

    NASA Astrophysics Data System (ADS)

    Church, P. D.; Grief, A.; Tsembelis, K.; Proud, W. G.; Murray, N. H.

    2004-07-01

    The lateral stress in materials has been measured, under shock wave loading, using manganin gauges mounted normal to the direction of shock propagation. Generally the sample has been sectioned along the direction of impact and adhered again with the gauge in this plane. A series of previous papers have reported a two-step structure in the lateral gauge history, the presence or absence of which indicates the presence of failure fronts in a variety of materials, such as ceramics and glasses. In glasses the evidence also includes velocity interferometry (VISAR) traces and high-speed photography where the failure front is also seen. The gauge configurations have been simulated using the QinetiQ Eulerian hydrocode GRIM3D to identify the effect of local material response on the function of the lateral gauge. These initial results have illustrated that tensile fractures occur along the material at the gauge/sample interface, which propagate behind the main shock front. Another feature is that the flyer plate can jet into the region of the lateral cut and therefore impart a separate shock into this region. Curiously these effects seem to have little impact on the predicted lateral stress history.

  8. Socially dependent auditory laterality in domestic horses (Equus caballus).

    PubMed

    Basile, Muriel; Boivin, Sarah; Boutin, Anaïs; Blois-Heulin, Catherine; Hausberger, Martine; Lemasson, Alban

    2009-07-01

    Laterality is now known to be an ubiquitous phenomenon among the vertebrates. Particularly, laterality of auditory processing has been demonstrated in a variety of species, especially songbirds and primates. Such a hemispheric specialization has been shown to depend on factors such as sound structure, species specificity and types of stimuli. Much less is known on the possible influence of social familiarity although a few studies suggest such an influence. Here we tested the influence of the degree of familiarity on the laterality of the auditory response in the domestic horse. This species is known for its social system and shows visible reactions to sounds, with one or two ears moving towards a sound source. By comparing such responses to the playback of different conspecific whinnies (group member, neighbor and stranger), we could demonstrate a clear left hemisphere (LH) preference for familiar neighbor calls while no preference was found for group member and stranger calls. Yet, we found an opposite pattern of ear side preference for neighbor versus stranger calls. These results are, to our knowledge, the first to demonstrate auditory laterality in an ungulate species. They open further lines of thought on the influence of the social "value" of calls and the listener's arousal on auditory processing and laterality. PMID:19283416

  9. Lateral orbitofrontal cortex links social impressions to political choices.

    PubMed

    Xia, Chenjie; Stolle, Dietlind; Gidengil, Elisabeth; Fellows, Lesley K

    2015-06-01

    Recent studies of political behavior suggest that voting decisions can be influenced substantially by "first-impression" social attributions based on physical appearance. Separate lines of research have implicated the orbitofrontal cortex (OFC) in the judgment of social traits on the one hand and economic decision-making on the other, making this region a plausible candidate for linking social attributions to voting decisions. Here, we asked whether OFC lesions in humans disrupted the ability to judge traits of political candidates or affected how these judgments influenced voting decisions. Seven patients with lateral OFC damage, 18 patients with frontal damage sparing the lateral OFC, and 53 matched healthy participants took part in a simulated election paradigm, in which they voted for real-life (but unknown) candidates based only on photographs of their faces. Consistent with previous work, attributions of "competence" and "attractiveness" based on candidate appearance predicted voting behavior in the healthy control group. Frontal damage did not affect substantially the ability to make competence or attractiveness judgments, but patients with damage to the lateral OFC differed from other groups in how they applied this information when voting. Only attractiveness ratings had any predictive power for voting choices after lateral OFC damage, whereas other frontal patients and healthy controls relied on information about both competence and attractiveness in making their choice. An intact lateral OFC may not be necessary for judgment of social traits based on physical appearance, but it seems to be crucial in applying this information in political decision-making. PMID:26041918

  10. Lateral hyporheic exchange throughout the Mississippi River network

    NASA Astrophysics Data System (ADS)

    Kiel, Brian A.; Bayani Cardenas, M.

    2014-06-01

    River water circulates vertically through the river bed and laterally through bank sediments. This hyporheic exchange brings river water into contact with microbes in the adjacent sediments, otherwise known as the hyporheic exchange zone. As such, hyporheic zones act as hotspots for the biogeochemical cycling of carbon, metals and nutrients in rivers, and can, for example, influence the export of nitrogen to downstream ecosystems. Here, we calculate the extent and duration of lateral hyporheic exchange throughout the Mississippi River network, using a physics-based numerical model that takes into account the distribution of groundwater baseflow, river discharge, alluvium permeability and river morphology. We find that in our simulations, lateral exchange occurs throughout the network: practically all of the river water that reaches the mouth of the Mississippi River network has circulated through the lateral hyporheic zone. River water residence time in the hyporheic zone ranges from less than an hour in headwaters to over a month in larger channels. Comparison of the residence times that we derive to a previously reported residence time threshold for denitrification suggests that around one quarter of the lateral hyporheic zones in the Mississippi River network favour denitrification, and thus nitrogen loss. Given that river water can circulate many times through the river bank before reaching the river mouth, and can undergo vertical exchange with the river bed, we suggest that our estimates serve as a lower limit for potential nitrogen loss.

  11. Minimally invasive device to effect vocal fold lateralization.

    PubMed

    Cummings, C W; Redd, E E; Westra, W H; Flint, P W

    1999-09-01

    Despite many operative procedures focused on vocal fold lateralization, none has achieved an acceptable level of dependability. Bilateral vocal fold abductor paralysis is treated by arytenoidectomy, cordotomy, suture lateralization, or partial cordectomy. Tracheotomy remains the gold standard for maximizing the airway and preserving phonatory function. We have developed a device that is minimally invasive, tunable, and reversible, with the potential for lateralization or medialization of the vocal process. The device consists of a polyethylene collar, a Vitallium cam, and a double-helix core for engaging soft tissue. It is introduced through a circular opening in the thyroid cartilage by a modified thyroplasty approach. Both the first and second iterations of this device have been evaluated for clinical effectiveness in 9 sheep by means of photographic and video documentation. Effectiveness in humans is currently being assessed. The results of the animal study permit us to have substantial optimism with respect to the clinical application of this device. PMID:10527272

  12. Issues Related to Lateral Stress Measurements in Alumina Ceramics

    NASA Astrophysics Data System (ADS)

    Field, J. E.; Tsembelis, K.; Brar, N. S.; Proud, W. G.; Dandekar, D. P.; Rosenberg, Z.

    2004-07-01

    Failure fronts or "waves" in brittle materials have been the subject of extensive research. This is a phenomenon where a damage front propagates behind the main shock wave and reduces the strength. It is reported to be observed by means of embedded lateral gauges where it manifests itself as a two-step structure. Such profiles were obtained when impacts were performed using copper flyers. Later, it was shown that this second rise in lateral stress was not evident in ceramic targets when either a ceramic projectile plate was employed or a thin ceramic cover plate was mounted on the front of the target. We now extend the use of different projectile materials such as heat treated 4340 steel and tungsten. We find that the second step is not evident and may instead be an effect of the experimental parameters and not related to the failure front.

  13. Vehicle Lateral State Estimation Based on Measured Tyre Forces

    PubMed Central

    Tuononen, Ari J.

    2009-01-01

    Future active safety systems need more accurate information about the state of vehicles. This article proposes a method to evaluate the lateral state of a vehicle based on measured tyre forces. The tyre forces of two tyres are estimated from optically measured tyre carcass deflections and transmitted wirelessly to the vehicle body. The two remaining tyres are so-called virtual tyre sensors, the forces of which are calculated from the real tyre sensor estimates. The Kalman filter estimator for lateral vehicle state based on measured tyre forces is presented, together with a simple method to define adaptive measurement error covariance depending on the driving condition of the vehicle. The estimated yaw rate and lateral velocity are compared with the validation sensor measurements. PMID:22291535

  14. Vehicle lateral state estimation based on measured tyre forces.

    PubMed

    Tuononen, Ari J

    2009-01-01

    Future active safety systems need more accurate information about the state of vehicles. This article proposes a method to evaluate the lateral state of a vehicle based on measured tyre forces. The tyre forces of two tyres are estimated from optically measured tyre carcass deflections and transmitted wirelessly to the vehicle body. The two remaining tyres are so-called virtual tyre sensors, the forces of which are calculated from the real tyre sensor estimates. The Kalman filter estimator for lateral vehicle state based on measured tyre forces is presented, together with a simple method to define adaptive measurement error covariance depending on the driving condition of the vehicle. The estimated yaw rate and lateral velocity are compared with the validation sensor measurements. PMID:22291535

  15. Analysis of laterally loaded pile groups in clay

    SciTech Connect

    Narasimha Rao, S.; Ramakrishna, V.G.S.T. [Indian Inst. of Technology, Madras (India). Ocean Engineering Centre

    1995-12-31

    The problem of pile groups subjected to lateral loads is of interest particularly in offshore and coastal regions. An understanding of pile-soil interaction is essential in designing such pile foundations. In this paper, a simplified finite element analysis in conjunction with Yegian and Wright approach has been presented to study the behavior of pile groups under lateral loads. The pile is treated as a shear beam and the soil media is assumed to be linear elastic. The results of the analysis are used to estimate: (1) Lateral Group Efficiency and (2) Extent of stress influence around the pile. The results obtained from the theoretical predictions are found to be reasonably in good agreement with the published literature.

  16. Nucleation-mediated lateral growth on foreign substrate

    SciTech Connect

    Shu, Da-Jun [unknown; Wang, Mu [Chinese Academy of Sciences; Liu, Feng [ORNL; Zhang, Zhenyu [ORNL; Peng, Ru-Wen [unknown; Zhang, Rong [unknown; Ming, Nai-Ben [unknown

    2007-01-01

    A model is developed to deal with lateral growth of a crystalline layer on a foreign substrate, which is mediated by successive nucleation at the concave corner defined by the meeting of a crystal facet and the substrate. It is demonstrated that due to an imbalance of surface/interface tensions at the concave corner, once the embryo of a nucleus is formed, the crystallographic orientation of the nucleus is spontaneously twisted. By successive nucleation at the concave corner, the crystalline layer develops laterally on the substrate, with its crystallographic orientation continuously rotated. In this way, a regular spatial pattern with well-defined long-range order is eventually achieved. Our model provides a criterion to predict when such an effect becomes observable in the nucleation-mediated lateral growth. The theoretical expectations are consistent with the experimental observations.

  17. Lateral vibration effects in atomic-scale friction

    NASA Astrophysics Data System (ADS)

    Roth, R.; Fajardo, O. Y.; Mazo, J. J.; Meyer, E.; Gnecco, E.

    2014-02-01

    The influence of lateral vibrations on the stick-slip motion of a nanotip elastically pulled on a flat crystal surface is studied by atomic force microscopy measurements on a NaCl(001) surface in ultra-high vacuum. The slippage of the nanotip across the crystal lattice is anticipated at increasing driving amplitude, similarly to what is observed in presence of normal vibrations. This lowers the average friction force, as explained by the Prandtl-Tomlinson model with lateral vibrations superimposed at finite temperature. Nevertheless, the peak values of the lateral force, and the total energy losses, are expected to increase with the excitation amplitude, which may limit the practical relevance of this effect.

  18. LATER models of neural decision behavior in choice tasks

    PubMed Central

    Noorani, Imran

    2014-01-01

    Reaction time has been increasingly used over the last few decades to provide information on neural decision processes: it is a direct reflection of decision time. Saccades provide an excellent paradigm for this because many of them can be made in a very short time and the underlying neural pathways are relatively well-known. LATER (linear approach to threshold with ergodic rate) is a model originally devised to explain reaction time distributions in simple decision tasks. Recently, however it is being extended to increasingly more advanced tasks, including those with decision errors and those requiring voluntary control such as the antisaccade task and those where sequential decisions are required. The strength of this modeling approach lies in its detailed, quantitative predictions of behavior, yet LATER models still retain their conceptual simplicity that made LATER initially successful in explaining reaction times in simple decision tasks. PMID:25202242

  19. Eliminating lateral violence in the ambulatory setting: one center's strategies.

    PubMed

    Dimarino, Tina J

    2011-05-01

    Lateral violence (eg, disruptive, disparaging, or uncivil behavior inflicted by one peer on another) creates an unpleasant work environment that can have harmful effects on individual nurses, team members, patients, and the bottom line of the health care organization. Educating nurses about the most common forms of lateral violence and strategies for handling inappropriate behavior can be the first step toward eliminating this behavior. Effective nursing leaders develop and maintain a "zero-tolerance" culture that includes clear and concise behavioral expectations and consequences for employees who exhibit unprofessional behavior. Use of a code of conduct, open communication, and quick resolution of issues that arise are strategies that one ambulatory surgery center has used to successfully combat lateral violence in the workplace. PMID:21530706

  20. 2D ultrasonic elastography with lateral displacement estimation using statistics.

    PubMed

    Zhang, Zhihong; Liu, Haolin; Cheng, Yangjie

    2014-01-01

    Ultrasound elastography is the method of obtaining relative stiffness information of biological tissue, which plays an important role in early diagnosis. Generally, a gradient-based strain imaging algorithm assumes that motion only occurs in an axial direction. However, because tissue has different relative stiffness, the scatter presents lateral motion under high freehand compression. Therefore, errors occur in estimating the cross-correlation phase in the calculation window. A 2D elastography algorithm with lateral displacement estimation using statistics was proposed to reduce errors. The new method was investigated through simulation, and the experiment confirmed that errors introduced by lateral tissue movement have been greatly reduced with no sacrifice of real-time ultrasonic imaging quality. PMID:25226983

  1. DSMC numerical simulation of lateral jet interaction with rarefied atmosphere

    NASA Astrophysics Data System (ADS)

    Liang, Jie; Li, Zhihui; Li, Xuguo; Fang, Ming

    2014-12-01

    Hybrid Cartesian grids and surface unstructured triangular cells are used in the DSMC method to simulate lateral jet interaction flow with rarefied atmosphere in transitional regime. The self-adaption of uniform Cartesian grid is conducted according to the local density gradient. The parallel DSMC code is used to compute the lateral jet interaction of a three-dimensional flat plate model on low density wind tunnel test conditions. The results of complex flow field structures, surface flow characteristics and separation lengths agree well with experimental data. The supersonic and hypersonic lateral jet interactions with hypersonic rarefied incoming flow on a slender blunt double-cone are investigated. The effects of flight altitudes, free stream velocities and angles of attack on plume-atmosphere interaction flow fields are numerically analyzed. The influences of parameter distributions with uniform /non-uniform nozzle exit on the separation distance and vortex structure near the jet are simulated in detail.

  2. Laparoscopic repair of recurrent lateral enterocele and rectocele.

    PubMed

    Solomon, Ellen R; Muffly, Tyler M; Hull, Tracy; Paraiso, Marie Fidela R

    2015-01-01

    It is difficult to determine what types of procedures should be attempted in patients who have recurrent prolapse. We present a case of recurrent lateral enterocele and rectocele after the patient had undergone multiple surgeries for pelvic organ prolapse (POP), including a vaginal hysterectomy, bladder-neck suspension, anterior colporrhaphy, site-specific rectocele repair, apical mesh implant, iliococcygeus vault suspension, and transobturator suburethral sling procedure. With recurrence, the patient underwent robot-assisted laparoscopic sacral colpopexy, tension-free vaginal tape transobturator sling insertion, rectocele repair, and perineorrhaphy with cystoscopy. She then presented with defecatory outlet obstruction and constipation and subsequently was treated with a stapled transanal rectal resection. The patient returned with continued defecatory dysfunction and a recurrent lateral enterocele and rectocele. The recurrence was treated laparoscopically using a lightweight polypropylene mesh. The postoperative period was uneventful. Two years later, the patient reported decreased defecatory symptoms and no further symptomatic prolapse. PMID:25224146

  3. Strategies of Healthy Adults Walking on a Laterally Oscillating Treadmill

    NASA Technical Reports Server (NTRS)

    Brady, Rachel A.; Peters, Brian T.; Bloomberg, Jacob J.

    2008-01-01

    We mounted a treadmill on top of a six degree-of-freedom motion base platform to investigate locomotor responses produced by healthy adults introduced to a dynamic walking surface. The experiment examined self-selected strategies employed by participants when exposed to continuous, sinusoidal lateral motion of the support surface while walking. Torso translation and step width were used to classify responses used to stabilize gait in a novel, dynamic environment. Two response categories emerged. Participants tended to either fix themselves in space (FIS), allowing the treadbelt to move laterally beneath them, or they fixed themselves to the base (FTB), moving laterally as the motion base oscillated. The degree of fixation in both extremes varied across participants. This finding suggests that normal adults have innate and varied preferences for reacquiring gait stability, some depending more heavily on vision (FIS group) and others on proprioception (FTB group). Keywords: Human locomotion, Unstable surface, Treadmill, Adaptation, Stability

  4. A theory for lateral wing-tip blowing

    NASA Technical Reports Server (NTRS)

    Tavella, D.; Roberts, L.

    1985-01-01

    The concept of lateral blowing consists in utilizing thin jets of air, which are ejected in the spanwise direction from slots at the tips of straight and swept wings, or along the leading edges of delta wings, to generate aerodynamic forces without the assistance of deflecting solid surfaces. For weak intensities of blowing the so-generated forces could be used for roll and lateral control of aircraft. In this work a theory for this concept as applied to straight wings is presented, revealing the analytical relationship between blowing and aerodynamic forces. The approach is based on perturbing the span of an elliptically loaded wing. Scaling laws involving blowing intensity, aspect ratio, and angle of attack are derived and compared with experiments. It is concluded that this concept has potential as a novel roll and lateral control device.

  5. [Chemical constituents of lateral roots of Aconitum carmichaelii Debx].

    PubMed

    Zhang, Jing; Sun, Gui-Bo; Lei, Qi-Fang; Li, Guang-Zhi; Wang, Jun-Chi; Si, Jian-Yong

    2014-08-01

    In order to find the cardiotonic constituents of lateral roots of Aconitum carmichaelii Debx., the investigation was carried out. Silica gel column chromatography, Sephadex LH-20, medium-pressure MCI and reverse phase ODS column chromatography were used to separate the 90% EtOH extract of the lateral roots of Aconitum carmichaelii Debx. The structures of the isolated compounds have been identified by chemical properties and spectroscopic analyses. Ten compounds were isolated and their structures were elucidated as benzoic acid-5-hydroxy-2-benzoyl-amino methyl ester (1), honokiol (2), pinoresinol (3), salicylic acid (4), p-hydroxy-cinnamic acid (5), songorine (6), karakoline (7), mesaconitine (8), hypaconitine (9) and 14-benzoylhypaconitine (10), separetely. Compound 1 is a new compound and its structure has been established by NMR, HR-ESI-MS, UV, IR and X-Ray. Compound 2-5 are isolated from the lateral roots of Aconitum carmichaelii Debx. for the first time. PMID:25322557

  6. 38 CFR 3.318 - Presumptive service connection for amyotrophic lateral sclerosis.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...service connection for amyotrophic lateral sclerosis. 3.318 Section 3.318 Pensions...service connection for amyotrophic lateral sclerosis. (a) Except as provided in paragraph...the development of amyotrophic lateral sclerosis manifested at any time after...

  7. 76 FR 78823 - Schedule for Rating Disabilities; Evaluation of Amyotrophic Lateral Sclerosis

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-20

    ...criterion for amyotrophic lateral sclerosis (ALS) in the VA Schedule...from the Amyotrophic Lateral Sclerosis Association. The comments...the Amyotrophic Lateral Sclerosis (ALS) Association strongly...proposed rule would ``rate multiple disabilities as a...

  8. Dynamic biomechanics of the human head in lateral impacts

    PubMed Central

    Zhang, Jiangyue; Yoganandan, Narayan; Pintar, Frank A.

    2009-01-01

    The biomechanical responses of human head (translational head CG accelerations, rotational head accelerations, and HIC) under lateral impact to the parietal-temporal region were investigated in the current study. Free drop tests were conducted at impact velocities ranging from 2.44 to 7.70 m/s with a 40 durometer, a 90 durometer flat padding, and a 90 durometer cylinder. Specimens were isolated from PMHS subjects at the level of occipital condyles, and the intracranial substance was replaced with brain simulant (Sylgard 527). Three tri-axial accelerometers were instrumented at the anterior, posterior, and vertex of the specimen, and a pyramid nine accelerometer package (pNAP) was used at the contra-lateral site. Biomechanical responses were computed by transforming accelerations measured at each location to the head CG. The results indicated significant “hoop effect” from skull deformation. Translational head CG accelerations were accurately measured by transforming the pNAP, the vertex accelerations, or the average of anterior/posterior acceleration to the CG. The material stiffness and structural rigidity of the padding changed the biomechanical responses of the head with stiffer padding resulting in higher head accelerations. At the skull fracture, HIC values were more than 2–3x higher than the frontal skull fracture threshold (HIC=1000), emphasizing the differences between frontal and lateral impact. Rotational head accelerations up to 42.1 krad/s2 were observed before skull fracture, indicating possible severe brain injury without skull fracture in lateral head impact. These data will help to establish injury criteria and threshold in lateral impacts for improved automotive protection and help clinicians understand the biomechanics of lateral head impact from improved diagnosis. PMID:20184848

  9. Evaluation of importance of lateral acceleration derivatives in extraction of lateral-directional derivatives at high angles of attack

    NASA Technical Reports Server (NTRS)

    Nguyen, L. T.

    1974-01-01

    A theoretical investigation was conducted to determine the importance of the lateral acceleration (beta) derivatives in the extraction of lateral-directional stability derivatives for swept wing airplanes at high angles of attack. Representative values of lateral acceleration derivatives in yaw and roll (Cn beta and Cl beta) were used in a computer program to generate representative flight motions at several angles of attack and altitudes. The computer-generated motions were then subjected to a parameter identification process based on a modified Newton-Raphson method. Two identification techniques were evaluated, one which included the beta derivatives and one which neglected them. The results of the study indicate that omission of the beta derivatives from mathematical models used in the derivative-extraction techniques can produce erroneous values for the lateral-directional stability derivatives particularly at high angles of attack, where the beta derivatives are large. The largest errors occur in the dynamic derivatives, but large errors may also occur in the static derivatives for cases in which the beta derivatives have large effects on the flight motions of the airplane. In addition, the resulting identified mathematical models provide poor motion prediction as well as erroneous predictions of dynamic modal characteristics. These results strongly indicate that the effects of beta derivatives should be considered in any attempt to extract lateral-directional aerodynamic parameters at high angles of attack.

  10. Morphological characteristics of lateral pelvic lymph nodes in rectal carcinoma

    Microsoft Academic Search

    Hiroyoshi Matsuoka; Tadahiko Masaki; Masanori Sugiyama; Yutaka Atomi; Yasuo Ohkura; Atsuhiko Sakamoto

    2007-01-01

    Aim  Macroscopic and imaging indicators for lymph node metastasis have been documented not in lateral pelvic lymph nodes but in\\u000a mesorectal lymph nodes in patients with rectal carcinoma. We conducted this study to uncover morphological characteristics\\u000a of lateral pelvic lymph nodes in patients with rectal carcinoma.\\u000a \\u000a \\u000a \\u000a Materials and methods  Fifty-eight patients with locally advanced rectal carcinoma who had total mesorectal excision and

  11. Resume and analysis of NACA lateral control research

    NASA Technical Reports Server (NTRS)

    Weick, Fred E; Jones, Robert T

    1937-01-01

    An analysis of the principal results of recent NACA lateral control research is made by utilizing the experience and progress gained during the course of the investigation. Two things are considered of primary importance in judging the effectiveness of different control devices: the (calculated) banking and yawing motion of a typical small airplane caused by a deflection of the control, and the stick force required to produce this deflection. The report includes a table in which a number of different lateral control devices are compared on these bases.

  12. Lateral load test of a drilled shaft in clay 

    E-print Network

    Kasch, Vernon R

    1977-01-01

    LATERAL LOAD TEST OF A DRILLED SHAFT IN CLAY A Thesis by VERNON RAY KASCH Submitted to the Graduate College of Texas A8M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1977 Major Subject...: Civil Engineering LATERAL LOAD TEST OF A DRILLED SHAFT IN CLAY A Thesis by VERNON RAY KASCH Approved as to style and content by: Harry M. Coyle - Ch irman of Committee Charles H. Samson, Jr. Head of Department Wayne . Dunlap - Ne er Christop er C...

  13. Specific biomembrane adhesion -Indirect lateral interactions between bound receptor molecules

    NASA Astrophysics Data System (ADS)

    Maier, C. W.; Behrisch, A.; Kloboucek, A.; Simson, D. A.; Merkel, R.

    We studied biomembrane adhesion using the micropipet aspiration technique. Adhesion was caused by contact site A, a laterally mobile and highly specific cell adhesion molecule from Dictyostelium discoideum, reconstituted in lipid vesicles of DOPC (L-?-dioleoylphosphatidylcholine) with an addition of 5 mol % DOPE-PEG{2000} (1,2-diacyl-sn-glycero-3-phosphatidylethanolamine-N-[poly(ethyleneglycol) 2000]). The "fuzzy" membrane mimics the cellular plasma membrane including the glycocalyx. We found adhesion and subsequent receptor migration into the contact zone. Using membrane tension jumps to probe the equation of state of the two-dimensional "gas" of bound receptor pairs within the contact zone, we found strong, attractive lateral interactions.

  14. An Improved Method of Manufacturing Corrugated Boxes: Lateral Corrugator

    SciTech Connect

    Frank C. Murray Ph.D.; , Roman Popil Ph.D.; Michael Shaepe (formerly with IPST, now at Cargill. Inc)

    2008-12-18

    Paper physicists have known that a corrugated box constructed from outer liner sheets having a predominant fiber orientation aligned with the corrugating flute direction would have higher stiffness and crush resistance (per unit of fiber weight) than the conventional box construction. Such increased performance per unit of fiber weight could result in fiber reduction and energy savings for boxes having equivalent performance specifications. The goal of this project was to develop and demonstrate a commercially viable lateral corrugating process. This included designing and building a pilot lateral corrugator, testing and evaluating pilot machine made boxes, and developing a strategy for commercialization.

  15. Negative quantum capacitance in graphene nanoribbons with lateral gates

    NASA Astrophysics Data System (ADS)

    Reiter, R.; Derra, U.; Birner, S.; Terrés, B.; Libisch, F.; Burgdörfer, J.; Stampfer, C.

    2014-03-01

    We present numerical simulations of the capacitive coupling between graphene nanoribbons of various widths and gate electrodes in different configurations. We compare the influence of lateral metallic or graphene side gate structures on the overall back gate capacitive coupling. Most interestingly, we find a complex interplay between quantum capacitance effects in the graphene nanoribbon and the lateral graphene side gates, giving rise to an unconventional negative quantum capacitance. The emerging nonlinear capacitive couplings are investigated in detail. The experimentally relevant relative lever arm, the ratio between the coupling of the different gate structures, is discussed.

  16. Lateral groundwater inflows into alluvial aquifers of main alpine valleys

    NASA Astrophysics Data System (ADS)

    Burger, Ulrich

    2015-04-01

    In alpine regions the topography is mainly characterised by deep incised valleys, mountain slopes and ridges. Usually the main valleys contain aquifers in alluvial soft rock. Lateral these aquifers are confined by mountainous hard rock slopes covered by heterogeneous sediments with different thickness. The slopes can be incised by lateral valleys. Numerical models for the main alluvial aquifers ask for lateral hydrogeological boundaries. Usually no flow boundaries or Constant head Boundaries are used, even if the lateral inflows to the main aquifers are rarely known. In this example a data set for a detailed investigated and monitored area is studied to give an answer on the location and the quantification of these lateral subsurface inflows. The study area is a typical main alpine valley with a thick alluvial aquifer (appr. 120m thick), lateral confined by granite, covered at the base of the steep slopes by quaternary sediments (Burger at al. 2012). The study consists of several steps 1.) Analytical calculation of the inflows on the base of investigated and monitored 2d profiles along fault zones (Perello et al 2013) which pinch out in the main valley 2.) Analytical models along typical W-dipping slopes with monitored slope springs 3.) Evaluating temperature and electrical conductivity profiles measured in approx. 30 groundwater wells in the alluvial aquifers and along the slopes to locate main lateral subsurface inflows 4.) Output of a regional model used for the hydrogeological back analyses of the excavation of a tunnel (Baietto et al. 2014) 5.) Output of a local numerical model calibrated with a monitoring dataset and results of a pumping test of big scale (450l/s for 10days) Results of these analyses are shown to locate and quantify the lateral groundwater inflows in the main alluvial aquifer. References Baietto A., Burger U., Perello P. (2014): Hydrogeological modelling applications in tunnel excavations: examples from tunnel excavations in granitic rocks; congress of IAEG, Engineering Geology for Society and Territory, Torino Burger U., San Nicoló L. Bösel D. und Perello P. (2012): Hydrogeologische Modelle - Hilfsmittel für die Planung am Beispiel des Brenner Basistunnel, Beiträge zur Beiträge zur COGeo 2011, Salzburg COGEO Perello P., Baietto A., Burger U., Skuk S. (2013): Excavation of the Aica-Mules pilot tunnel for the Brenner base tunnel: information gained on water inflows in tunnels in granitic massifs, Rock Mechanics and Rock Engineering, DOI 10.1007/s00603-013-0480-x

  17. MOBILIZAÇÃO DE RESERVAS EM SEMENTES DE Apuleia leiocarpa (Vogel) J.F. Macbr. (GARAPA) DURANTE A EMBEBIÇÃO1

    Microsoft Academic Search

    Claudia Aparecida Pontes; Eduardo Euclydes; Rita de Cassia; Gonçalves Borges; Carlos Pedro Boechat Soares

    RESUMO - Quantificou-se a mobilização de reservas no eixo embrionário, nos cotilédones e no tegumento de sementes de Apuleia leiocarpa (garapa), durante a germinação. Os resultados mostram que houve aumento significativo das reservas de amido, ácido esteárico e proteína nos cotilédones durante o processo de embebição. Por outro lado, no embrião houve aumento significativo somente nos teores de manose, enquanto

  18. A TACTILE DISPLAY USING LATERAL SKIN STRETCH Jrme Pasquero

    E-print Network

    Hayward, Vincent

    STRESS: A TACTILE DISPLAY USING LATERAL SKIN STRETCH Jérôme Pasquero Department of ElectricalSS (« Stimulator for Tactile Receptors by Skin Stretch »), un nouvel afficheur tactile qui stimule la peau du bout Jérôme Pasquero, MMIII #12;ii ABSTRACT This thesis describes a new tactile display device (Stimulator

  19. Tactile interface for stimulation of fingertip via lateral traction.

    E-print Network

    Hartmann, Mitra J. Z.

    Tactile interface for stimulation of fingertip via lateral traction. M. Wiertlewski 1 , J. Lozada 1 Intelligents et de Robotique, 75005, Paris, France Abstract: Tactile displays are gaining recognition as new human-machine interfaces. This paper present a low-weight, single-axis tactile interface designed

  20. Restricted lateral diffusion of luteinizing hormone receptors in membrane microdomains.

    PubMed

    Wolf-Ringwall, Amber L; Winter, Peter W; Liu, Jingjing; Van Orden, Alan K; Roess, Deborah A; Barisas, B George

    2011-08-26

    Single particle tracking was used to evaluate lateral motions of individual FLAG-tagged human luteinizing hormone (LH) receptors expressed on CHO cells and native LH receptors on both KGN human granulosa-derived tumor cells and M17 human neuroblastoma cells before and after exposure to human chorionic gonadotropin (hCG). Compared with LH receptors on untreated cells, LH receptors on cells treated with 100 nm hCG exhibit restricted lateral diffusion and are confined in small, nanometer-scale, membrane compartments. Similar to LH receptors labeled with Au-hCG, LH receptors labeled with gold-deglycosylated hCG, an hCG antagonist, also exhibit restricted lateral diffusion and are confined in nanoscale membrane compartments on KGN cells treated with 100 nm hCG. LH receptor point mutants lacking potential palmitoylation sites remain in large compartments despite treatment with 100 nm hCG as do LH receptors on cells treated with cytochalasin D. Finally, both polarization homotransfer fluorescence resonance energy transfer imaging and photon counting histogram analysis indicate that treatment with hCG induces aggregation of YFP-coupled LH receptors stably expressed on CHO cells. Taken together, our results demonstrate that binding of hCG induces aggregation of LH receptors within nanoscale, cell surface membrane compartments, that hCG binding also affects the lateral motions of antagonist binding LH receptors, and that receptor surface densities must be considered in evaluating the extent of hormone-dependent receptor aggregation. PMID:21690095

  1. Thomson Reuters to release Book Citation Index later this year

    Microsoft Academic Search

    Maxine Aldred

    2011-01-01

    Thomson Reuters will launch its new Book Citation Index later this year. Projected to include 25,000 volumes from major publishers and university presses in science, social science, and the humanities, the Book Citation Index will cover scholarly books (both series and nonseries) that present original research or literature reviews. The current effort regarding the science section is focused on books

  2. Amyotrophic Lateral Sclerosis: New Developments in Diagnostic Markers

    Microsoft Academic Search

    Reinhard Dengler; Nils von Neuhoff; Johannes Bufler; Klaus Krampfl; Thomas Peschel; Julian Grosskreutz

    2005-01-01

    There is an intensive search for diagnostic markers in amyotrophic lateral sclerosis (ALS). Protein analysis (proteomics) of the cerebrospinal fluid (CSF) appears particularly promising using mass spectrometry and 2-D gel electrophoresis to detect low and high molecular weight proteins, respectively. It is open whether protein changes specific for ALS will be found. This also holds true for inflammatory proteins such

  3. Severe hypoxia impairs lateralization in a marine teleost fish.

    PubMed

    Lucon-Xiccato, Tyrone; Nati, Julie J H; Blasco, Felipe Rocco; Johansen, Jacob L; Steffensen, John F; Domenici, Paolo

    2014-12-01

    In intertidal environments, the recurring hypoxic condition at low tide is one of the main factors affecting fish behaviour, causing broad effects on ecological interactions. We assessed the effects of hypoxia on lateralization (e.g. the tendency to turn left or right), a behaviour related to brain functional asymmetry, which is thought to play a key role in several life history aspects of fish. Using staghorn sculpin (Leptocottus armatus), a benthic fish that typically inhabits the intertidal zone, we found that hypoxia affects behavioural lateralization at the population level. On average, staghorn sculpins showed a distinct preference for right turns under normoxic conditions (>90% oxygen saturation), but an equal probability of turning right or left after exposure to hypoxia for 2 h (20% oxygen saturation). The specific turning preference observed in the staghorn sculpin control population is likely to have an adaptive value, for example in predator-prey interactions by enhancing attack success or survival from predatory attacks. Therefore the alteration of lateralization expressed by staghorn sculpins under hypoxic conditions may have far-reaching implications for species ecology and trophic interactions. Moreover, our work raises the need to study this effect in other species, in which a hypoxia-driven disruption of lateralization could affect a wider range of behaviours, such as social interactions and schooling. PMID:25359933

  4. Lateralization of gene expression in human language cortex.

    PubMed

    Karlebach, Guy; Francks, Clyde

    2015-06-01

    Lateralization is an important aspect of the functional brain architecture for language and other cognitive faculties. The molecular genetic basis of human brain lateralization is unknown, and recent studies have suggested that gene expression in the cerebral cortex is bilaterally symmetrical. Here we have re-analyzed two transcriptomic datasets derived from post mortem human cerebral cortex, with a specific focus on superior temporal and auditory language cortex in adults. We applied an empirical Bayes approach to model differential left-right expression, together with gene ontology (GO) analysis and meta-analysis. There was robust and reproducible lateralization of individual genes and GO groups that are likely to fine-tune the electrophysiological and neurotransmission properties of cortical circuits, most notably synaptic transmission, nervous system development and glutamate receptor activity. Our findings anchor the cerebral biology of language to the molecular genetic level. Future research in model systems may determine how these molecular signatures of neurophysiological lateralization effect fine-tuning of cerebral cortical function, differently in the two hemispheres. PMID:25863470

  5. Fluid dynamics based prediction of liquefaction induced lateral spreading

    Microsoft Academic Search

    R. Uzuoka; A. Yashima; T. Kawakami; J.-M. Konrad

    1998-01-01

    This paper presents and verifies a numerical method to predict the lateral spreading of liquefied subsoil based on fluid dynamics. A numerical fluid dynamics code is modified to incorporate the Bingham viscosity with the minimum undrained strength of liquefied subsoil. The numerical method is applied to shaking table tests of a liquefied slope with and without an underground structure and

  6. Rupture of the quadriceps tendon after arthroscopic lateral meniscectomy

    Microsoft Academic Search

    Renato Viola; Nicola Marzano; Roberto Vianello

    2001-01-01

    We report a case of complete quadriceps tendon rupture that occured a few days after arthroscopic lateral meniscectomy. Complications following arthroscopy are rare; there have been many reports of quadriceps tendon rupture in the literature, but none by this kind of mechanism.

  7. Lateral sinus thrombosis associated with zoster sine herpete

    Microsoft Academic Search

    James Chan; Richard T. Bergstrom; Donald C. Lanza; John G. Oas

    2004-01-01

    Herpes zoster results from reactivation of the varicella zoster virus (VZV). Zoster sine herpete (ZSH) is an uncommon manifestation of VZV infection and presents with similar symptoms but without the vesicular rash. We describe an unusual case of lateral sinus thrombosis (LST) that developed during the clinical course of ZSH in the C2 distribution. A 55-year-old woman presented with a

  8. Preview Control for Vehicle Lateral Guidance in Highway Automation

    Microsoft Academic Search

    Huei Peng; Masayoshi Tomizuka

    1991-01-01

    Continuous deterministic preview control is applied to the vehicle lateral contol problem. It is shown that the preview control consists of a feedback term and two feedforward terms. If the preview control algorithm is applied on the FSLQ augmented system, the feedback term will be exactly the same as the FSLQ feedback control law. Therefore, the advantages of the FSLQ

  9. Planning in Middle Childhood: Early Predictors and Later Outcomes

    ERIC Educational Resources Information Center

    Friedman, Sarah L.; Scholnick, Ellin K.; Bender, Randall H.; Vandergrift, Nathan; Spieker, Susan; Pasek, Kathy Hirsh; Keating, Daniel P.; Park, Yoonjung

    2014-01-01

    Data from 1,364 children and families who participated in the National Institute of Child Health and Human Development's Study of Early Child Care and Youth Development were analyzed to track the early correlates and later academic outcomes of planning during middle childhood. Maternal education, through its effect on parenting quality when…

  10. Lateral Position Dependence of MIMO Capacity in a Hallway

    E-print Network

    Ellingson, Steven W.

    Lateral Position Dependence of MIMO Capacity in a Hallway at 2.4 GHz Steve Ellingson & Mahmud Harun & State University ellingson@vt.edu #12;2 MIMO Capacity Ellingson ­ Jan 5, 2008 Hallway Scenarios Capacity Ellingson ­ Jan 5, 2008 MIMO in Hallways (From: D. Porrat, P. Kyritsi, and D.C. Cox, "MIMO

  11. Insular Lateralization in Tinnitus Distress.1 van der Loo, E.

    E-print Network

    Paris-Sud XI, Université de

    Insular Lateralization in Tinnitus Distress.1 van der Loo, E. 1 , Congedo, M. 2 , Vanneste, S. 1;Abstract8 Tinnitus affects 15% of the population. Of these 1­2% are severely disabled by it. The role of9 the autonomic system in tinnitus is hardly being investigated. The aim of this study is to10 investigate

  12. Later Life Learning Experience among Chinese Elderly in Hong Kong

    ERIC Educational Resources Information Center

    Leung, Angela; Lui, Yu-Hon; Chi, Iris

    2005-01-01

    In a world with increasing numbers of older adults and a worldwide emphasis placed on lifelong learning, it is crucial to examine and formulate appropriate policy for learning in later life (LLL). Hong Kong has a rapidly aging population, which is projected to double within the next 25 years. However, lifelong learning for the elderly has yet to…

  13. 7. Historic American Buildings Survey Photocopy, August 1951 LATERAL VIEW, ...

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

    7. Historic American Buildings Survey Photocopy, August 1951 LATERAL VIEW, EAST FRONT, OLD PHOTOGRAPH c. 1850 Restricted: Permission for use must be obtained in writing from Art Library, Yale University, New Haven, Conn. - Skinner-Trowbridge House, 46 Hillhouse Avenue, New Haven, New Haven County, CT

  14. Ratchet effects in graphene and quantum wells with lateral superlattice

    SciTech Connect

    Golub, L. E.; Nalitov, A. V.; Ivchenko, E. L. [Ioffe Physical-Technical Institute of the Russian Academy of Sciences, St. Petersburg (Russian Federation); Olbrich, P.; Kamann, J.; Eroms, J.; Weiss, D.; Ganichev, S. D. [Terahertz Center, University of Regensburg, Regensburg (Germany)

    2013-12-04

    Theoretical and experimental studies on the ratchet effects in graphene and in quantum wells with a lateral superlattice excited by alternating electric fields of terahertz frequency range are presented. We discuss the Seebeck ratchet effect and helicity driven photocurrents and show that the photocurrent generation is based on the combined action of a spatially periodic in-plane potential and a spatially modulated light.

  15. A Longitudinal Study of the Development of Dichhaptic Lateralization.

    ERIC Educational Resources Information Center

    Van Blerkom, Malcolm L.

    A follow-up study was made of cross-sectional research on the development of dichhaptic lateralization. One hundred and eighty students in grades 3, 5, 7, 9, and 11 from two school districts were tested. Participants were 9 boys and 9 girls from each grade level for each district. Subjects were at least 90 percent right-handed, as determined by…

  16. Acoustic Investigations into the Later Acquisition of Syllabic "-es" Plurals

    ERIC Educational Resources Information Center

    Mealings, Kiri T.; Cox. Felicity; Demuth, Katherine

    2013-01-01

    Purpose: Children acquire /-ez/ syllabic plurals (e.g., buses) later than /-s, -z/ segmental plurals (e.g., cats,dogs). In this study, the authors explored whether increased syllable number or segmental factors best explains poorer performance with syllabic plurals. Method: An elicited imitation experiment was conducted with 14 two-year-olds…

  17. Differences in motor laterality between breeds of performance horse

    Microsoft Academic Search

    Paul D. McGreevy; Peter C. Thomson

    2006-01-01

    This study examined the relationship between motor laterality in horses bred for different types of work and therefore different temperaments. Foreleg preference during grazing was measured in three populations of domestic horse, Thoroughbreds (TB, bred to race at the gallop), Standardbreds (SB, bred for pacing) and Quarter Horses (QH, in this case bred for so-called “cutting work” which involves manoeuvring

  18. CRJ Aircraft Flight Simulation: A Lateral System Identification Study

    E-print Network

    Liu, Hugh H.T.

    CRJ Aircraft Flight Simulation: A Lateral System Identification Study Prof. Hugh H.T. Liu 30-Jul-2007 The "Flight Systems and Control" research laboratory at the UTIAS is in- terested in aircraft integrated modeling and simulation. Our previous work [1] investigated system identification for longitudinal

  19. Electrical Transport Study of Patterned Lateral Niobium-Permalloy Junctions

    Microsoft Academic Search

    Saidur Rahman Bakaul; Kebin Li; Guchang Han; Yihong Wu

    2008-01-01

    In order to investigate the interplay between magnetic domain walls and superconductivity we study the electrical transport property of lateral Nb-permalloy-Nb junctions where the permalloy thickness is varied from 50 to 90 nm. Magnetic force microscopy images confirm the presence of domain walls in the ferromagnetic portion between the two superconducting electrodes for samples with permalloy thickness of 60, 70

  20. Controller design for improving lateral vehicle dynamic stability

    Microsoft Academic Search

    Seung-Jin Heo; Inho Baek

    2001-01-01

    A vehicle dynamics control system has been developed in this study for improving vehicle dynamic stability under critical lateral motions. The system consists of a feedforward controller, a state feedback controller, and an estimator for the body sideslip angle. The linear quadratic regulator theory has been exploited for the state feedback gain, and for estimation of the body sideslip angle,

  1. Language Lateralization in Children Using Functional Transcranial Doppler Sonography

    ERIC Educational Resources Information Center

    Haag, Anja; Moeller, Nicola; Knake, Susanne; Hermsen, Anke; Oertel, Wolfgang H.; Rosenow, Felix; Hamer, Hajo M.

    2010-01-01

    Aim: Language lateralization with functional transcranial Doppler sonography (fTCD) and lexical word generation has been shown to have high concordance with the Wada test and functional magnetic resonance imaging in adults. We evaluated a nonlexical paradigm to determine language dominance in children. Method: In 23 right-handed children (12…

  2. Characterization of charge carrier lateral conduction in irradiated dielectric materials

    Microsoft Academic Search

    R. Hanna; T. Paulmier; M. Belhaj; P. Molinie; B. Dirassen; D. Payan; N. Balcon

    2011-01-01

    A characterization method for surface charging analysis on insulators submitted to electron irradiation has been developed. This method, based on the use of two Kelvin probes (KPs), provides details on the transit time motion for injection of both holes and electrons. It can also be used to assess the isotropy of lateral electrical conduction on the sample. The feasibility of

  3. 14 CFR 25.147 - Directional and lateral control.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...allow normal maneuvers (such as recovery from upsets produced by gusts and the initiation of evasive maneuvers). There must be...to allow a limited amount of maneuvering and to correct for gusts. Lateral control must be enough at any speed up to V FC...

  4. 14 CFR 25.147 - Directional and lateral control.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...allow normal maneuvers (such as recovery from upsets produced by gusts and the initiation of evasive maneuvers). There must be...to allow a limited amount of maneuvering and to correct for gusts. Lateral control must be enough at any speed up to V FC...

  5. 14 CFR 25.147 - Directional and lateral control.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...allow normal maneuvers (such as recovery from upsets produced by gusts and the initiation of evasive maneuvers). There must be...to allow a limited amount of maneuvering and to correct for gusts. Lateral control must be enough at any speed up to V FC...

  6. 14 CFR 25.147 - Directional and lateral control.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...allow normal maneuvers (such as recovery from upsets produced by gusts and the initiation of evasive maneuvers). There must be...to allow a limited amount of maneuvering and to correct for gusts. Lateral control must be enough at any speed up to V FC...

  7. Traumatic transection of the lateral rectus muscle with chorioretinitis sclopetaria.

    PubMed

    MacKenzie, Kelly; Verity, David; Ali, Nadeem

    2015-03-01

    A man, aged 67 years, sustained monocular trauma to the left eye while gardening, presenting with light perception, complete absence of abduction, and chorioretinitis sclopetaria. At surgery, the lateral rectus was found to be transected at the equator of the globe, with an area of locally abraded sclera. A few posterior muscle fibers were identified and sutured to the residual anterior fibers. With a partial improvement of the esodeviation, after a further 6 months he proceeded to lateral transposition of the superior and inferior recti to healthy sclera 4?mm from the limbus, with adjunctive medial rectus botulinum toxin. Six months later, the angle of primary deviation remained stable at 4 prism diopters base out with improved abduction. Vision in the eye remained reduced at 20/200 (with eccentric fixation) due to macular changes secondary to the sclopetaria. In conclusion, this case describes a rare example of complete traumatic transection of the lateral rectus with chorioretinitis sclopetaria, due to orbital injury. With appropriate surgery, the angle of deviation can be considerably improved despite complete muscle transection and scleral injury. PMID:25790075

  8. 9. VIEW SHOWING CHILDREN SWIMMING IN A LATERAL OF THE ...

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

    9. VIEW SHOWING CHILDREN SWIMMING IN A LATERAL OF THE GRAND CANAL LOCATION UNKNOWN. THE HUGE COTTONWOOD TREES THAT ONCE-LINED MOST CANALS AND DITCHES WERE CUT DOWN WHEN IT WAS DISCOVERED THAT THEY CONSUMED HUNDREDS OF GALLONS OF WATER EACH DAY. Photographer unknown, no date - Grand Canal, North side of Salt River, Tempe, Maricopa County, AZ

  9. Minimal incision rhytidectomy (short scar face lift) with lateral SMASectomy

    Microsoft Academic Search

    Daniel C. Baker

    2001-01-01

    Minimal incision rhytidectomy has the primary advantages of preserving the posterior hairline and avoiding retroauricular scars. This short-scar face lift with lateral SMASectomy and platysma resection, performed by the author on more than 500 patients in the past 3 years, provides the versatility of traditional SMAS flap undermining and the safety and rapidity of SMAS plication.

  10. Early Father's and Mother's Involvement and Child's Later Educational Outcomes

    ERIC Educational Resources Information Center

    Flouri, E.; Buchanan, A.

    2004-01-01

    Background: Few studies have investigated the individual long-term contributions that mothers and fathers make to their children's schooling. Aims: (1) To explore the role of early father involvement in children's later educational attainment independently of the role of early mother involvement and other confounds, (2) to investigate whether…

  11. Medial and lateral gonarthrosis treated with high tibial osteotomy

    Microsoft Academic Search

    P. J. Jokio; T. S. Lindholm; E. Vankka

    1985-01-01

    A prospective series comprising 52 knees in 48 patients suffering from medial or lateral unicompartmental gonarthrosis and treated by means of high tibial osteotomy shows, by comparing mechanical axis (MA) 0° corrected knees, how important is the overcorrection of the MA into valgus in medial osteoarthritis. The clinical results were significantly correlated to overcorrection, the results 2 years post-operatively being

  12. Adulthood Predictors of Health Promoting Behavior in Later Aging

    ERIC Educational Resources Information Center

    Holahan, Carole K.; Suzuki, Rie

    2004-01-01

    This study investigated adulthood predictors of health-promoting behavior in later aging. The participants were 162 members of the Terman Study of the Gifted (Terman et al., 1925), who responded in 1999 at an average age of 86 to a mailout questionnaire which included questions concerning their positive health behavior. Adulthood variables were…

  13. Even in Later Life, Exercise Seems to Pay Dividends

    MedlinePLUS

    Even in Later Life, Exercise Seems to Pay Dividends Study links activity in older men to longer lives To use the sharing features on this ... THURSDAY, May 14, 2015 (HealthDay News) -- A little exercise late in life may help men live longer, ...

  14. Rasch Measurement in the Assessment of Amytrophic Lateral Sclerosis Patients.

    ERIC Educational Resources Information Center

    Norquist, Josephine M.; Fitzpatrick, Ray; Jenkinson, Crispin

    2003-01-01

    Examined the sensitivity to change over time of the Amytrophic Lateral Sclerosis Assessment Questionnaire (ALSAQ-40; C. Jenkinson and others, 1999). Findings for 764 individuals show that the ALSAQ-40 is a valid and responsive disease-specific health-related quality of life instrument for studies of patients with motor neuron diseases. (SLD)

  15. Representation of negative motivational value in the primate lateral habenula

    E-print Network

    . Making an appropriate choice of action requires that the brain computes the value for each actionRepresentation of negative motivational value in the primate lateral habenula Masayuki Matsumoto & Okihide Hikosaka An action may lead to either a reward or a punishment. Therefore, an appropriate action

  16. Phytoplankton assemblages in lateral lagoons of a large tropical reservoir.

    PubMed

    Ferrareze, M; Nogueira, M G

    2013-02-01

    This study aimed to analyse the composition and ecological attributes of the phytoplankton assemblages in four lateral lagoons and in the main channel of Rosana Reservoir (Paranapanema River, SE Brazil). Fieldwork was carried out in September and November/2004 and January, March, May and August/2005. A total of 283 taxa was identified. Zygnemaphyta was the most specious group, followed by Chlorophyta and Bacillariophyta. Higher richness, abundance and biomass were observed in the lagoons when compared with the river-reservoir sampling point, especially during the rainy period. Cryptophyceae and Bacillariophyceae dominated numerically. Cryptomonas brasiliensis Castro, Bicudo and Bicudo was the main species of the phytoplankton in terms of abundance and frequency of occurrence. The dynamics of the most important taxa are discussed and the results showed that the phytoplankton assemblages are mainly influenced by meteorological factors and nutrient availability (the main driving forces). Correlation analyses indicated that the assemblage abundance was limited by nutrient (nitrogen and phosphorus). The phytoplankton abundance influenced positively the zooplankton abundance, what indicates the prevalence of bottom-up control routes in the lateral lagoons system. The results validate the hypotheses that lateral lagoons have a prominent ecological role on the phytoplankton diversity, as already previously demonstrated for fish and zooplankton. Therefore, the incorporation of the lateral lagoons in environmental programmes should be a target strategy for the conservation of the regional aquatic biota, minimising the negative impact of the dam. PMID:23644798

  17. MICROBIOLOGY (for students entering Biology in Fall 2011 or later)

    E-print Network

    Jiang, Wen

    MICROBIOLOGY (for students entering Biology in Fall 2011 or later) Graduation Requirements Requirement: Choose one of these four options: (Microbiology majors must choose BIOL 43800 and 43900, General Microbiology and Microbiology lab) A. BIOL 39500 Macromolecules (3 cr.; fall) B. BIOL 36600 Principles

  18. MICROBIOLOGY (for students entering Biology in Fall 2010 or later)

    E-print Network

    Jiang, Wen

    MICROBIOLOGY (for students entering Biology in Fall 2010 or later) Graduation Requirements, Intro. To Evolution & Ecology (2 cr.; fall) 9. One of these four options: (Microbiology majors must choose BIOL 43800 and 43900, General Microbiology and Microbiology lab) A. BIOL 39500 Macromolecules (3

  19. Platelet Serotonin Level Predicts Survival in Amyotrophic Lateral Sclerosis

    E-print Network

    Paris-Sud XI, Université de

    Platelet Serotonin Level Predicts Survival in Amyotrophic Lateral Sclerosis Luc Dupuis1,2 *, Odile. Methodology: Platelet and plasma unconjugated concentrations of serotonin and plasma 5-HIAA, the major: Platelet serotonin levels were significantly decreased in ALS patients. Platelet serotonin levels did

  20. Lateral versus Perpendicular Segregation in Mixed Polymer Brushes

    Microsoft Academic Search

    S. Minko; M. Müller; D. Usov; A. Scholl; C. Froeck; M. Stamm

    2002-01-01

    Grafting of incompatible polymers on a substrate prevents macrophase separation and the chains self-assemble laterally. Mixed brushes are exposed to different solvents and the morphology is observed via atomic force and x-ray photoemission microscopy. In a nonselective solvent the different species segregate into parallel cylinders (``ripple structure''). Upon exposure to a selective solvent, we encounter a transition to a ``dimple''

  1. Ideal Ends: John Dewey's Later Vision for Education.

    ERIC Educational Resources Information Center

    Cunningham, Craig A.

    This paper explores the topic of "ends" in John Dewey's educational theories. It deals with the shift from "capacity" to "potentiality" in Dewey's conception of the learner, revealing that Dewey became aware of flaws in his "Democracy and Education" and sought to correct them. One of the motivations behind much of his later work was developing a…

  2. Amyotrophic Lateral Sclerosis in Southern Greece: An Epidemiologic Study

    Microsoft Academic Search

    Nikolaos Kalfakis; Demetrios Vassilopoulos; Constantinos Voumvourakis; Marilena Ndjeveleka; Constantinos Papageorgiou

    1991-01-01

    All amyotrophic lateral sclerosis cases hospitalized over a 25-year period in the University Department of Neurology in Athens were surveyed, with emphasis given to the occupation of the patients and the geographic distribution of the disease. The results showed an overrepresentation of farmers among patients and an aggregation of cases in the region of Cephalonia. These findings might suggest that

  3. The Joint Development of Hemispheric Lateralization for Words and Faces

    PubMed Central

    Dundas, Eva M.; Plaut, David C.; Behrmann, Marlene

    2014-01-01

    Consistent with longstanding findings from behavioral studies, neuroimaging investigations have identified a region of the inferior temporal cortex that, in adults, shows greater face-selectivity in the right than left hemisphere and, conversely, a region that shows greater word-selectivity in the left than right hemisphere. What has not been determined is how this pattern of mature hemispheric specialization emerges over the course of development. The current study examines the hemispheric superiority for faces and words in children, young adolescents and adults in a discrimination task in which stimuli are presented briefly in either hemifield. Whereas adults showed the expected left and right visual field superiority for face and word discrimination, respectively, the young adolescents demonstrated only the right field superiority for words and no field superiority for faces. Although the children's overall accuracy was lower than that of the older groups, like the young adolescents, they exhibited a right visual field superiority for words but no field superiority for faces. Interestingly, the emergence of face lateralization was correlated with reading competence, measured on an independent standardized test, after regressing out age, quantitative reasoning scores, and face discrimination accuracy. Taken together, these findings suggest that the hemispheric organization of face and word recognition do not develop independently, and that word lateralization, which emerges earlier, may drive later face lateralization. A theoretical account in which competition for visual representations unfolds over the course of development is proposed to account for the findings. PMID:22866684

  4. Diorhabda elongate and saltcedar control: 10 years later

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Saltcedar (Tamarix ramosissima), native to Central Asia, is a shrub or small tree that has invaded more than 1.9 million hectares of habitat in southwestern and western United States. Saltcedar was brought to the United States in the early 1800s as an ornamental and later planted for windbreaks and...

  5. CORECT?RI PROTETICE ALE AGENEZIEI DE INCISIV LATERAL MAXILAR

    Microsoft Academic Search

    ALINA MONICA; JEAN FRANÇOIS LASSERRE; ANDREA MARIA KURTINECZ

    2010-01-01

    Congenitally missing or peg shaped lateral incisor are relatively frequent and determine important aesthetic problems. Modern treatments as implant-suported crowns or conventional prosthetics they both can resolve this clinical situation: individual conditions will decide the most appropriate option for aesthetic and fonctional rehabilitation. Orthodontic treatment is ussually reccommended to be performed for the preparation of the arch in patients with

  6. The Concept of Anomalous Cerebral Lateralization in Klinefelter Syndrome

    Microsoft Academic Search

    Maria Ganou; George Grouios; Irene Koidou; Anastasia Alevriadou

    2010-01-01

    Klinefelter syndrome (KS) is a genetic disorder in males characterized by the presence of an extra X chromosome. Its most consistent endocrinological manifestations include lower testosterone production and impaired spermatogenesis. KS individuals have a general typical appearance with taller stature, and they demonstrate a characteristic cognitive phenotype involving weaknesses in verbal processing. Anomalous cerebral lateralization involves the inverse or weak

  7. Nursery school personality and political orientation two decades later

    Microsoft Academic Search

    Jack Block; Jeanne H. Block

    2005-01-01

    The present study reports on the personality attributes of nursery school children who two decades later were reliably stratiWed along a liberal\\/conservative dimension. An unprecedented ana- lytical opportunity existed to evaluate how the political views of these young adults related to assess- ments of them when in nursery school, prior to their having become political beings. Preschool children who 20

  8. Rotational synkineses of occiput and atlas on lateral inclination

    Microsoft Academic Search

    J. Jirout

    1981-01-01

    An X-ray analysis was performed with regard to the question of synkinetic rotational movements of occiput and atlas on lateral inclination of the head and neck. It was found that the frequent synkinetic rotation of the head from the side of inclination can be taken for a stereotype that is ten times more frequent than the rotation towards the side

  9. Paper No. : 0317 LATERAL SPREADING DURING CENTRIFUGE MODEL

    E-print Network

    Haigh, Stuart

    Paper No. : 0317 LATERAL SPREADING DURING CENTRIFUGE MODEL EARTHQUAKES Stuart K. Haigh1 , S sand marker lines within centrifuge models. A series of dynamic centrifuge model tests have been these free boundaries from previous earthquakes. Dynamic centrifuge modelling was carried out using sloping

  10. Lateral mixing as a source of subtropical tropospheric water vapor

    E-print Network

    Pierrehumbert, Raymond

    Lateral mixing as a source of subtropical tropospheric water vapor R. T. Pierrehumbert Dept #12; Abstract It is hypothesized that the subtropical water vapor distribution results from that the Lagrangian model would also be useful in interpreting satellite water vapor data, and in diagnosing water

  11. Lateral mixing as a source of subtropical tropospheric water vapor

    E-print Network

    Pierrehumbert, Raymond

    Lateral mixing as a source of subtropical tropospheric water vapor R. T. Pierrehumbert Dept #12;Abstract It is hypothesized that the subtropical water vapor distribution results from that the Lagrangian model would also be useful in interpreting satellite water vapor data, and in diagnosing water

  12. Wave propagation in laterally varying media: A model expansion method

    Microsoft Academic Search

    Charles B. Archambeau

    1991-01-01

    A general approach, using modes defined on subregions of the medium, has been developed to model seismic wave propagation in media with vertically and horizontally acoustic waves in fluid media and electromagnetic wave propagation in laterally varying media. The restriction on the medium variability is that it can be represented by step function variations in its properties in both the

  13. Hazard of persistent cigarette smoking in later life

    Microsoft Academic Search

    J. H. ABRAMSON

    1977-01-01

    Data derived from four major prospective epidemiological studies in the U.S. and Britain indicate that persistent cigarette smoking in later life carries an appreciable hazard. In two of these studies men aged over 65 years who smoked cigarettes had a significantly higher mortality from coronary heart disease than men who had ceased to smoke cigarettes, and in all four studies

  14. Using Monomolecular Films to Characterize Lipid Lateral Interactions

    PubMed Central

    Brown, Rhoderick E.; Brockman, Howard L.

    2008-01-01

    Summary Membrane lipids are structurally diverse in ways that far exceed the role envisioned by Singer and Nicholson of simply providing a fluid bilayer matrix in which proteins reside. Current models of lipid organization in membranes postulate that lipid structural diversity enables nonrandom lipid mixing in each leaflet of the bilayer, resulting in regions with special physical and functional properties, i.e., microdomains. Central to understanding the tendencies of membrane lipids to mix nonrandomly in biomembranes is the identification and evaluation of structural features that control membrane lipid lateral mixing interactions in simple model membranes. The surface balance provides a means to evaluate the lateral interactions among different lipids at a most fundamental level—mixed in binary/ternary combinations that self-assemble at the air–water interface as monomolecular films, i.e., monolayers. Analysis of surface pressure and interfacial potential as a function of average cross-sectional molecular area provide insights into hydrocarbon chain ordering, lateral compressibility/elasticity, and dipole effects under various conditions including those that approximate one leaflet of a bilayer. Although elegantly simple in principle, effective use of the surface balance requires proper attention to various experimental parameters, which are described herein. Adequate attention to these experimental parameters ensures that meaningful insights are obtained into the lipid lateral interactions and enables lipid monolayers to serve as a basic platform for use with other investigative approaches. PMID:18214373

  15. Measurement of the Lateral Transport Current Distribution in YBCO Tape

    Microsoft Academic Search

    Pavol Usak; Milan Polak; Pavol Mozola

    2009-01-01

    Hall probe mapping was applied to the self-field of the YBCO superconducting tape with gradually increasing and decreasing transport current. The mapped data of magnetic field component perpendicular to the tape plane were used in inverse calculation of the lateral current distribution across the width of the tape for different current levels. The concept of longitudinal invariance of current distribution

  16. Early Speech Perception and Later Language Development: Implications for the \\

    Microsoft Academic Search

    Patricia K. Kuhl; Barbara T. Conboy; Denise Padden; Tobey Nelson; Jessica Pruitt

    2005-01-01

    In this article, we present a summary of recent research linking speech perception in infancy to later language development, as well as a new empirical study examining that linkage. Infant phonetic discrimination is initially language universal, but a de- cline in phonetic discrimination occurs for nonnative phonemes by the end of the 1st year. Exploiting this transition in phonetic perception

  17. Lead Exposure as a Risk Factor for Amyotrophic Lateral Sclerosis

    Microsoft Academic Search

    F. Kamel; D. M. Umbach; H. Hu; T. L. Munsat; J. M. Shefner; J. A. Taylor; D. P. Sandler

    2005-01-01

    Background: The etiology of amyotrophic lateral sclerosis (ALS) likely involves an environmental component. We qualitatively assessed literature on ALS and lead exposure. Problems of study design make case reports and studies of lead in blood or tissues difficult to interpret. Most previous case-control studies found an association of ALS with self-reported occupational exposure to lead, with increased risks of 2-

  18. Lateral blasts at Mount St. Helens and hazard zonation

    Microsoft Academic Search

    Dwight R. Crandell; Richard P. Hoblitt

    1986-01-01

    Lateral blasts at andesitic and dacitic volcanoes can produce a variety of direct hazards, including ballistic projectiles which can be thrown to distances of at least 10 km and pyroclastic density flows which can travel at high speed to distances of more than 30 km. Indirect effect that may accompany such explosions include wind-borne ash, pyroclastic flows formed by the

  19. Laterality and Intellectual Ability: A Just Not Noticeable Difference?

    ERIC Educational Resources Information Center

    Hardyck, C.

    1977-01-01

    Research on laterality and intellectual abilities suggests that left-handed persons may be divided into two categories: one not discriminably different from those who are right-handed, and one deficient in intellectual and cognitive abilities. 7688 children were tested on handedness, intellectual performance, and scholastic aptitude in order to…

  20. Cerebral lateralization and cognitive deficits after congenital hemiparesis

    Microsoft Academic Search

    Anneli Kolk; Tiina Talvik

    2002-01-01

    The purpose of this study was to investigate whether and how handedness is related to the processes of cerebral lateralization and cognitive performance in children with congenital insult. Fifty-six children (31 males and 25 females) with congenital hemiparesis and 14 control subjects were investigated. Of these children, 32 had a left hemisphere lesion, and 24 children had a right hemisphere

  1. Styling in a Language Learned Later in Life

    ERIC Educational Resources Information Center

    Rampton, Ben

    2013-01-01

    This article analyses the styles of English produced by an adult migrant who started to speak the language later in life, and it approaches them from the perspective of quantitative style-shifting and discursive stylization. After defining style and the procedures needed to justify the term "L2," the study describes the focal…

  2. Regulation of affect by the lateral septum: implications for neuropsychiatry

    Microsoft Academic Search

    Teige P Sheehan; R. Andrew Chambers; David S Russell

    2004-01-01

    Substantial evidence indicates that the lateral septum (LS) plays a critical role in regulating processes related to mood and motivation. This review presents findings from the basic neuroscience literature and from some clinically oriented research, drawing from behavioral, neuroanatomical, electrophysiological, and molecular studies in support of such a role, and articulates models and hypotheses intended to advance our understanding of

  3. Lateral Response Evaluation of Single Piles Using Inclinometer Data

    Microsoft Academic Search

    San-Shyan Lin; Jen-Cheng Liao

    2006-01-01

    In an effort to develop an efficient method for interpretation of lateral pile load test results via measured inclinometer data only, an analytical model is proposed based on energy conservation of a pile-soil system. A Fourier series function is used to represent deflection behavior of the pile-soil system. In order to obtain shear, moment, and soil reaction along the pile

  4. Global Warming 20 Years Later: Tipping Points Near

    E-print Network

    Hansen, James E.

    Global Warming 20 Years Later: Tipping Points Near Jim Hansen 23 June 2008 National Press Club, and House Select Committee on Energy Independence & Global Warming Washington, DC #12;1988 Testimony Has Big Effects Did Not Emphasize That Global Warming Enhances Both Extremes of Water Cycle - More

  5. RC column strengthening by lateral pre-tensioning of FRP

    Microsoft Academic Search

    Ali A. Mortazavi; Kypros Pilakoutas; Ki Sang Son

    2003-01-01

    This paper presents a unique strengthening technique for existing concrete columns that use expansive materials to apply lateral pre-tensioning. The technique increases the capacity and ductility of a column as well as achieving better utilisation of the confining FRP (Fibre Reinforced Polymer) material. The confinement material properties and the confined cylinder performance are investigated experimentally. From the results, it is

  6. Intrathecal thyrotropin-releasing hormone therapy of amyotrophic lateral sclerosis

    Microsoft Academic Search

    T. Stober; K. Schimrigk; S. Dietzsch; T. Thielen

    1985-01-01

    Six patients with amyotrophic lateral sclerosis were given from 800 to 4000 µg of thyrotropin-releasing hormone (TRH) intrathecally for a period of 2–6 months. The progressive course of this disease, manifested by increasing atrophy, paralysis and disability score, was not altered. This supports the hypothesis that the decrease in TRH content in the anterior horn region is secondary to the

  7. Lateral Knee Braces in Football: Do They Prevent Injury?

    ERIC Educational Resources Information Center

    Paulos, Lonnie E.; And Others

    1986-01-01

    The results of three recently presented clinical studies and a biomechanical study of the use of lateral knee braces to prevent knee injuries are reviewed. The results raise serious doubts about the efficacy of the preventive knee braces which are currently available. (Author/MT)

  8. 17. Photocopy of drawing, Erection Plan of Top Lateral Bracing ...

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

    17. Photocopy of drawing, Erection Plan of Top Lateral Bracing of Bridge at South Norwalk for the N.Y., N.H. and H.R.R., dated June 12, 1895. Original on file with Metro North Commuter Railroad. - South Norwalk Railroad Bridge, South Main & Washington Streets, Norwalk, Fairfield County, CT

  9. Comprehensive Study on Tip Vortex with Lateral Jet Flow

    Microsoft Academic Search

    Choongmo Yang; Jehyun Baek; Shigeru Saito; Takashi Aoyama

    2005-01-01

    Comprehensive numerical and experimental investigations of tip vortical characteristics were conducted for lateral tip jet flow over a fixed wing as a step to reduce blade vortex interaction noise. The tip vortex of a NACA0012 blade was measured and visualized for the fundamental study of tip vortical flow, and the results were compared with numerical data as a validation of

  10. Early Math Matters: Kindergarten Number Competence and Later Mathematics Outcomes

    ERIC Educational Resources Information Center

    Jordan, Nancy C.; Kaplan, David; Ramineni, Chaitanya; Locuniak, Maria N.

    2009-01-01

    Children's number competencies over 6 time points, from the beginning of kindergarten to the middle of 1st grade, were examined in relation to their mathematics achievement over 5 later time points, from the end of 1st grade to the end of 3rd grade. The relation between early number competence and mathematics achievement was strong and significant…

  11. Wafer Scale Encapsulation of Large Lateral Deflection MEMS Structures

    Microsoft Academic Search

    A. B. Graham; M. Messana; P. Hartwell; J. Provine; S. Yoneoka; B. Kim; R. Melamud; R. T. Howe; T. W. Kenny

    2009-01-01

    Packaging of microelectromechanical systems (MEMS) is a critical step in the transition from product development to production. This paper presents a robust, hermetically-sealed encapsulation method that can accommodate many traditional MEMS devices by allowing large lateral deflection structures within a clean environment. Using the new technology described in this paper, trench widths ranging from 1 mum to 100 mum were

  12. Modeling, Simulation, and Parameter Estimation of Lateral Spacecraft Fuel Slosh

    NASA Technical Reports Server (NTRS)

    Chatman, Yadira; Gangadharan, Sathya; Marsell, Brandon; Schlee, Keith; Sudermann, James; Walker, Charles; Ristow, James

    2008-01-01

    Predicting the effect of fuel slosh on a spacecraft and/or launch vehicle attitude control system is a very important and a challenging task. Whether the spacecraft is under spinning or lateral moving conditions, the dynamic effect of the fuel slosh will help determine whether the spacecraft will remain on its chosen trajectory. There are three categories of slosh that can be caused by launch vehicle and/or spacecraft maneuvers when the fuel is in the presence of an acceleration field. These include bulk fluid motion, subsurface wave motion, and free surface slosh. Each of these slosh types have a periodic component that is defined by either a spinning or lateral motion. For spinning spacecraft, all three types of slosh can play a major role in determining stability. Bulk fluid motion and free surface slosh can affect the lateral slosh characteristics. For either condition, the possibility for an unpredicted coupled resonance between the spacecraft and its on board fuel can have mission threatening affects. This on-going research effort aims at improving the accuracy and efficiency of modeling techniques used to predict these types of lateral fluid motions. In particular, efforts will focus on analyzing the effects of viscoelastic diaphragms on slosh dynamics.

  13. Amyotrophic lateral sclerosis: frequent complications by cervical spondylosis

    Microsoft Academic Search

    Masahito Yamada; Yutaka Furukawa; Mie Hirohata

    2003-01-01

    Cervical spondylosis is associated with myelopathy and radiculopathy, which sometimes mimic clinical manifestations of amyotrophic lateral sclerosis (ALS), a fatal neurodegenerative disorder that affects upper and lower motor neurons. Cervical spondylosis may coexist with ALS because both diseases preferentially affect individuals of middle or old age. We investigated 63 patients with ALS to clarify the complications of cervical spondylosis and

  14. Efferent Modulation of Physiological Properties of the Limulus Lateral Eye

    Microsoft Academic Search

    Vanessa J. Ruta; Frederick A. Dodge; Robert B. Barlow

    The visual system of the horseshoe crab Limulus polyphemus undergoes marked circadian changes in sensitivity that are con- trolled by a clock in the animal's brain (1). At night, efferent optic nerve activity to the lateral eyes induces multiple physio- logical, anatomical and metabolic changes in all retinal cell types (2). These changes function together to facilitate detection of a

  15. Visual laterality in dolphins: importance of the familiarity of stimuli

    PubMed Central

    2012-01-01

    Background Many studies of cerebral asymmetries in different species lead, on the one hand, to a better understanding of the functions of each cerebral hemisphere and, on the other hand, to develop an evolutionary history of hemispheric laterality. Our animal model is particularly interesting because of its original evolutionary path, i.e. return to aquatic life after a terrestrial phase. The rare reports concerning visual laterality of marine mammals investigated mainly discrimination processes. As dolphins are migrant species they are confronted to a changing environment. Being able to categorize new versus familiar objects would allow dolphins a rapid adaptation to novel environments. Visual laterality could be a prerequisite to this adaptability. To date, no study, to our knowledge, has analyzed the environmental factors that could influence their visual laterality. Results We investigated visual laterality expressed spontaneously at the water surface by a group of five common bottlenose dolphins (Tursiops truncatus) in response to various stimuli. The stimuli presented ranged from very familiar objects (known and manipulated previously) to familiar objects (known but never manipulated) to unfamiliar objects (unknown, never seen previously). At the group level, dolphins used their left eye to observe very familiar objects and their right eye to observe unfamiliar objects. However, eyes are used indifferently to observe familiar objects with intermediate valence. Conclusion Our results suggest different visual cerebral processes based either on the global shape of well-known objects or on local details of unknown objects. Moreover, the manipulation of an object appears necessary for these dolphins to construct a global representation of an object enabling its immediate categorization for subsequent use. Our experimental results pointed out some cognitive capacities of dolphins which might be crucial for their wild life given their fission-fusion social system and migratory behaviour. PMID:22239860

  16. Whole-body response to pure lateral impact.

    PubMed

    Lessley, David; Shaw, Greg; Parent, Daniel; Arregui-Dalmases, Carlos; Kindig, Matthew; Riley, Patrick; Purtsezov, Sergey; Sochor, Mark; Gochenour, Thomas; Bolton, James; Subit, Damien; Crandall, Jeff; Takayama, Shinichi; Ono, Koshiro; Kamiji, Koichi; Yasuki, Tsuyoshi

    2010-11-01

    The objective of the current study was to provide a comprehensive characterization of human biomechanical response to whole-body, lateral impact. Three approximately 50th-percentile adult male PMHS were subjected to right-side pure lateral impacts at 4.3 ± 0.1 m/s using a rigid wall mounted to a rail-mounted sled. Each subject was positioned on a rigid seat and held stationary by a system of tethers until immediately prior to being impacted by the moving wall with 100 mm pelvic offset. Displacement data were obtained using an optoelectronic stereophotogrammetric system that was used to track the 3D motions of the impacting wall sled; seat sled, and reflective targets secured to the head, spine, extremities, ribcage, and shoulder complex of each subject. Kinematic data were also recorded using 3-axis accelerometer cubes secured to the head, pelvis, and spine at the levels of T1, T6, T11, and L3. Chest deformation in the transverse plane was recorded using a single chestband. Following the impact the subject was captured in an energy-absorbing net that provided a controlled non-injurious deceleration. The wall maintained nearly constant velocity throughout the impact event. One of the tested subjects sustained 16 rib fractures as well as injury to the struck shoulder while the other two tested subjects sustained no injuries. The collected response data suggest that the shoulder injury may have contributed to the rib fractures in the injured subject. The results suggest that the shoulder presents a substantial load path and may play an important role in transmitting lateral forces to the spine, shielding and protecting the ribcage. This characterization of whole-body, lateral impact response provides quantified subject responses and boundary condition interactions that are currently unavailable for whole-body, lateral impacts at impact speeds less than 6.7 m/s. PMID:21512913

  17. Mini-Open Approach for Direct Lateral Lumbar Interbody Fusion

    PubMed Central

    Chung, Sung-Soo; Pae, Young-Ryeol; Park, Se-Jun

    2014-01-01

    Study Design Retrospective analysis. Purposes To introduce the mini-open lateral approach for the anterior lumbar interbody fusion (ALIF), and to investigate the advantages, technical pitfalls and complications by providing basic knowledge on extreme lateral interbody fusion (XLIF) or direct lumbar interbody fusion (DLIF). Overview of Literature Recently, minimally invasive lateral approach for the lumbar spine is revived and receiving popularity under the name of XLIF or DLIF by modification of mini-open method when using the sequential tubular dilator and special expandable retractor system. Methods Seventy-four patients who underwent surgery by the mini-open lateral approach from September 2000 to April 2008 with various disease entities were included. Blood losses, operation times, incision sizes, postoperative time to mobilization, length of hospital stays, technical problems and complications were all analyzed. Results The blood losses and operation times of patients who underwent simple ALIF were 61.2 mL and 86 minutes for one level, 107 mL and 106 minutes for two levels, 250 mL and 142.8 minutes for three levels, and 400 mL and 190 minutes for four levels of fusion. The incision sizes were on average 4.5 cm for one level, 6.3 cm for two levels, 8.5 cm for three levels and 10.0 cm for four levels of fusion. The complications were retroperitoneal hematoma (2 cases), pneumonia (1 case) and transient lumbosacral plexus palsy (3 cases). Conclusions Trials of mini-open lateral approach would be helpful before the trial of XLIF or DLIF. However, special attention is required for complications such as transient lumbosacral plexus palsy. PMID:25187867

  18. DETERMINAZIONE SPERIMENTALE DELLE FORZE E DEI MOMENTI ESERCITATI DAL PILOTA DURANTE LA GUIDA DI UNO SCOOTER

    Microsoft Academic Search

    R. Capitani; D. G. Rosti

    La valutazione del comportamento di handling di un veicolo a due ruote è fondamentale per la messa a punto di un nuovo modello. La possibilità di anticipare tale valutazione durante la fase di progetto, riduce i costi ed i tempi di sviluppo prodotto. In quest'ottica si inquadra un'ampia attività, svolta in collaborazione con la Piaggio & C. SpA, che mira

  19. Coupling of cantilever lateral bending and torsion in torsional resonance and lateral excitation modes of atomic force microscopy

    Microsoft Academic Search

    Yaxin Song; Bharat Bhushan

    2006-01-01

    Torsional resonance (TR) mode and lateral excitation (LE) mode of atomic force microscopy (AFM) have been increasingly used in atomic and nanoscale surface imaging. In TR and LE modes, it is the changes of the cantilever dynamic characteristics caused by tip-sample interaction that reveal surface properties. For quantitative explanation of measured results, researchers have established dynamic models of TR and

  20. that only 40% of the bees were deflected lateral-ly even at 100% of the available light intensity.

    E-print Network

    Paris-Sud XI, Université de

    that only 40% of the bees were deflected lateral- ly even at 100% of the available light intensity were similar to those in ex- periment 1. Video recordings taken from the side showed that the bees, 48% on aver- age for drones. This means that in Experiment 2 the flow-field increasingly disappeared

  1. Phosphate starvation of maize inhibits lateral root formation and alters gene expression in the lateral root primordium zone

    PubMed Central

    2012-01-01

    Background Phosphorus (P) is an essential macronutrient for all living organisms. Maize (Zea mays) is an important human food, animal feed and energy crop throughout the world, and enormous quantities of phosphate fertilizer are required for maize cultivation. Thus, it is important to improve the efficiency of the use of phosphate fertilizer for maize. Results In this study, we analyzed the maize root response to phosphate starvation and performed a transcriptomic analysis of the 1.0-1.5?cm lateral root primordium zone. In the growth of plants, the root-to-shoot ratio (R/L) was reduced in both low-phosphate (LP) and sufficient-phosphate (SP) solutions, but the ratio (R/L) exhibited by the plants in the LP solution was higher than that of the SP plants. The growth of primary roots was slightly promoted after 6?days of phosphate starvation, whereas the numbers of lateral roots and lateral root primordia were significantly reduced, and these differences were increased when associated with the stress caused by phosphate starvation. Among the results of a transcriptomic analysis of the maize lateral root primordium zone, there were two highlights: 1) auxin signaling participated in the response and the modification of root morphology under low-phosphate conditions, which may occur via local concentration changes due to the biosynthesis and transport of auxin, and LOB domain proteins may be an intermediary between auxin signaling and root morphology; and 2) the observed retardation of lateral root development was the result of co-regulation of DNA replication, transcription, protein synthesis and degradation and cell growth. Conclusions These results indicated that maize roots show a different growth pattern than Arabidopsis under low-phosphate conditions, as the latter species has been observed to halt primary root growth when the root tip comes into contact with low-phosphate media. Moreover, our findings enrich our understanding of plant responses to phosphate deficits and of root morphogenesis in maize. PMID:22704465

  2. Lateral continuity of sorptive mineral zones underlying Yucca Mountain, Nevada

    SciTech Connect

    Campbell, K.

    1987-08-01

    Mineralogical investigations at Yucca Mountain in southwestern Nevada are part of the characterization of this site for a potential nuclear waste repository. This report analyzes compositional data obtained by x-ray powder diffraction for several hundred samples from fourteen drill holes in the vicinity of Yucca Mountain. Mineralization is compared with the functional stratigraphy for the region. Three major zeolitized intervals below the Topopah Spring Member of the Paintbrush Tuff are of particular interest because of their potential to retard the transport of dissolved radionuclides. No significant lateral trends in total zeolitization within these units are noted in the neighborhood of the Exploration Block, but there are trends in the abundances of the individual zeolites. Much local variation that cannot be explained by either vertical or lateral trends is observed.

  3. CCD evaluation for estimating measurement precision in lateral shearing interferometry

    NASA Astrophysics Data System (ADS)

    Liu, Bingcai; Li, Bing; Tian, Ailing; Li, Baopeng

    2013-06-01

    Because of larger measurement ability of wave-front deviation and no need of reference plat, the lateral shearing interferometry based on four step phase shifting has been widely used for wave-front measurement. After installation shearing interferograms are captured by CCD camera, and the actual phase data of wave-front can be calculated by four step phase shift algorithm and phase unwrapping. In this processing, the pixel resolution and gray scale of CCD camera is the vital factor for the measurement precision. In this paper, Based on the structure of lateral shearing surface interferometer with phase shifting, pixel resolution more or less for measurement precision is discussed. Also, the gray scale is 8 bit, 12 bit or 16 bit for measurement precision is illustrated by simulation.

  4. Endoscopic-Assisted Total Thyroidectomy via Lateral Keloid Scar Incision

    PubMed Central

    2014-01-01

    Thyroidectomy is traditionally performed by the transcervical approach. To avoid or reduce visible scarring, diverse innovative surgical trials have been reported. Here we report a patient who underwent endoscopic thyroidectomy via a lateral keloid scar due to a previous traffic accident. A 30-year-old woman presented with a papillary thyroid carcinoma. Total thyroidectomy was performed via a keloid scar incision. The keloid scar was then revised. The total thyroidectomy was successful, resulting in no acute complications, such as neural injury, hematoma, or seroma formation. The keloid scar healed with excellent cosmetic results and the patient remains free of disease 12 months after excision. Endoscopic total thyroidectomy via a lateral keloid scar incision healed not only the physical disease but also the mental disease. PMID:25436057

  5. [Control of the rear foot in lateral movements in sports].

    PubMed

    Stacoff, A; Steger, J; Stüssi, E

    1993-03-01

    The goals of this investigation were to establish the frequency distribution of different movements in various ball sports (1) and to test the influence of altered shoe sole constructions on the stability in lateral breaking movements (2). Firstly, a video analysis was carried out to establish the frequency distribution of different movements in sporting activities such as volleyball, basketball, team handball and football (soccer). It is shown that a selected number of lateral cutting movements can represent more than half of all movements observed in one of the sporting activities. For part 2 an investigation with three systematically varied shoes was undertaken. The results show that with altered shoe sole constructions (torsion and change of shape of the shoe-sole) the supination movement with shoes comes close to the barefoot values. In respect of abduction/adduction of the foot the systematic changes of the shoe soles had no measurable influence. PMID:8484163

  6. Autonomic responses to lateralized cold pressor and facial cooling tasks.

    PubMed

    McGinley, Jared J; Friedman, Bruce H

    2015-03-01

    Asymmetry in central nervous system (CNS) control of autonomic nervous system (ANS) activity, a widely debated topic, was investigated via lateralized presentation of two ANS challenges: cold pressor, which elicits primarily sympathetic activation, and facial cooling, a predominantly vagal task. Seventy-three university students (37 female) engaged in these tasks while cardiovascular and electrodermal measures were acquired. Compared to right-side cold pressor, left cold pressor elicited generally larger cardiac, blood pressure, and skin conductance responses, but did not evoke asymmetric changes in heart rate variability. Facial cooling elicited significant increases in vagally mediated heart rate variability, but they were also not lateralized. These findings are consistent with reports of right hemisphere dominance in sympathetic regulation, but indicate that CNS vagal control is relatively symmetric. These results are framed in terms of polyvagal theory and neurovisceral integration two influential models of CNS-ANS integration in the service of adaptive environmental engagement. PMID:25250478

  7. Late-onset congenital lateral dermal sinus tract.

    PubMed

    Nishimon, Mari; Shimizu, Yusuke; Ueno, Mari; Iwanami, Akio

    2014-01-01

    Cases of laterally located, congenital dermal sinus tracts are extremely rare, with only six having been reported to date. We describe a case of a 14-year-old girl who developed symptoms of this type of sinus tract at an age that was considerably older than is usually reported. At the age of 12 years, the patient exhibited a purulent discharge from a pit on the right buttock. MRI indicated the presence of two tracts running from the right buttock skin to a cystic lesion that had formed on the right ala of the sacral spine. The lesion was surgically resected and successfully reconstructed using a partial iliocostalis lumborum muscle flap, without any functional morbidity. From our experience, such flaps appear to be appropriate treatment choices for lateral congenital dermal sinus tracts that develop late and result in large defects. PMID:25535223

  8. Photoluminescence structure, and composition of laterally anodized porous Si

    NASA Technical Reports Server (NTRS)

    Jung, K. H.; Shih, S.; Kwong, D. L.; George, T.; Lin, T. L.; Liu, H. Y.; Zavada, J.

    1992-01-01

    We have studied the photoluminescence (PL), structure, and composition of laterally anodized porous Si. Broad PL peaks were observed centered between about 620-720 nm with strong intensities measured from 500 to 860 nm. Macroscopic variations in PL intensities and peak positions are explained in terms of the structure and anodization process. Structural studies suggest that the PL appears to originate from a multilayered porous Si structure in which the top two layers are amorphous. X-ray diffraction spectra also suggest the presence of a significant amorphous phase. In addition to high concentrations of B and N, we have measured extremely high concentrations much greater than 10 exp 20 cu cm of H, C, O, and F. Our results indicate that laterally anodized porous Si does not fit the crystalline Si quantum wire model prevalent in the literature suggesting that some other structure is responsible for the observed luminescence.

  9. Lateral Habenula determines long-term storage of aversive memories

    PubMed Central

    Tomaiuolo, Micol; Gonzalez, Carolina; Medina, Jorge H.; Piriz, Joaquin

    2014-01-01

    The Lateral Habenula (LHb) is a small brain structure that codifies negative motivational value and has been related to major depression. It has been shown recently that LHb activation is sufficient to induce aversive associative learning; however the key question about whether LHb activation is required for an aversive memory to be formed has not been addressed. In this article we studied the function of the LHb in memory formation using the Inhibitory Avoidance task (IA). We found that LHb inactivation during IA training does not disrupt memory when assessed 24 h after, but abolishes it 7 days later, indicating that LHb activity during memory acquisition is not necessary for memory formation, but regulates its temporal stability. These effects suggest that LHb inactivation modifies subjective perception of the training experience. PMID:24860453

  10. Planning in middle childhood: early predictors and later outcomes.

    PubMed

    Friedman, Sarah L; Scholnick, Ellin K; Bender, Randall H; Vandergrift, Nathan; Spieker, Susan; Hirsh Pasek, Kathy; Keating, Daniel P; Park, Yoonjung

    2014-01-01

    Data from 1,364 children and families who participated in the National Institute of Child Health and Human Development's Study of Early Child Care and Youth Development were analyzed to track the early correlates and later academic outcomes of planning during middle childhood. Maternal education, through its effect on parenting quality when children were 54 months old, predicts their concurrent performance on sustained attention, inhibition, and short-term verbal memory tests. This performance predicts planning in first grade, which predicts third-grade reading and mathematics attainment, but not the rate of growth in academic skills from first to fifth grades. This path was also found when the same parenting, cognitive, and academic constructs were measured at later time points. PMID:24476334

  11. Experimental and computational investigation of lateral gauge response in polycarbonate

    NASA Astrophysics Data System (ADS)

    Eliot, Jim; Harris, Ernst; Hazell, Paul; Appleby-Thomas, Gareth; Winter, Ronald; Wood, David; Owen, Gareth

    2011-06-01

    Polycarbonate's use in personal armour systems means its high strain-rate response has been extensively studied. Interestingly, embedded lateral manganin stress gauges in polycarbonate have shown gradients behind incident shocks, suggestive of increasing shear strength. However, such gauges need to be embedded in a central (typically) epoxy interlayer - an inherently invasive approach. Recently, research has suggested that in such metal systems interlayer/target impedance may contribute to observed gradients in lateral stress. Here, experimental T-gauge (Vishay Micro-Measurements® type J2M-SS-580SF-025) traces from polycarbonate targets are compared to computational simulations. This work extends previous efforts such that similar impedance exists between the interlayer and matrix (target) interface. Further, experiments and simulations are presented investigating the effects of a ``dry joint'' in polycarbonate, in which no encapsulating medium is employed.

  12. Wigner analysis of three dimensional pupil with finite lateral aperture.

    PubMed

    Chen, Hsi-Hsun; Oh, Se Baek; Zhai, Xiaomin; Tsai, Jui-Chang; Cao, Liang-Cai; Barbastathis, George; Luo, Yuan

    2015-02-23

    A three dimensional (3D) pupil is an optical element, most commonly implemented on a volume hologram, that processes the incident optical field on a 3D fashion. Here we analyze the diffraction properties of a 3D pupil with finite lateral aperture in the 4-f imaging system configuration, using the Wigner Distribution Function (WDF) formulation. Since 3D imaging pupil is finite in both lateral and longitudinal directions, the WDF of the volume holographic 4-f imager theoretically predicts distinct Bragg diffraction patterns in phase space. These result in asymmetric profiles of diffracted coherent point spread function between degenerate diffraction and Bragg diffraction, elucidating the fundamental performance of volume holographic imaging. Experimental measurements are also presented, confirming the theoretical predictions. PMID:25836443

  13. Lateral ankle ligament injury following inversion ankle sprain.

    PubMed

    Stehr, Matthew T

    2012-02-01

    The patient was a 20-year-old man who was referred to a physical therapist 6 weeks following an inversion sprain of his right ankle. Radiographs were completed and had been interpreted as normal, but due to continued complaints of instability and marked laxity on examination, ankle stress radiographs were ordered. Talar tilt stress radiographs were suggestive of lateral ligamentous insufficiency of the right ankle. PMID:22333733

  14. Projections to lateral vestibular nucleus from cerebellar climbing fiber zones

    Microsoft Academic Search

    G. Andersson; O. Oscarsson

    1978-01-01

    1.The olivary projections to the lateral vestibular nucleus (LVN), direct and excitatory through climbing fiber collaterals and indirect and inhibitory through climbing fiber activated Purkinje cells, were investigated in cats with the spinal cord transected at C3 sparing only the contralateral ventral funiculus. In this preparation all spinocerebellar paths are interrupted except the ventral spino-olivocerebellar paths (VF-SOCPs). Three VF-SOCPs responding

  15. Electrotonic coupling between neurons in the rat lateral vestibular nucleus

    Microsoft Academic Search

    Henri Korn; Constantino Sotelo; Francis Crepel

    1973-01-01

    Correlation of morphological and electrophysiological data strongly suggest that in rat, the giant cells of the lateral vestibular nucleus (L.V.N.) are electrotonically coupled. 1. in addition to “active zones” large terminals synapsing on the perikaryon and\\/or the main dendritic trunk of the cells bear “gap” junctions which are interpreted as low electrical resistance pathways between neurons. 2. electrical activity of

  16. Application of Micromachining Technology to Lateral Field Emission Devices

    Microsoft Academic Search

    Veljko Milanovi; Lance Doherty; Dana A. Teasdale; Chen Zhang; Siavash Parsa; Kristofer S. J. Pister

    2000-01-01

    We demonstrate a range of novel applications of micromachining and microelectromechanical systems (MEMS) in achieving efficient and tunable field emission devices (FEDs), and in improving their ease of integration. In each case, arrays of lateral field emission tips are fabricated with submicron spacing utilizing deep reactive ion etch (DRIE). Tip density of over 150··106 tips\\/cm2 can be achieved, and current

  17. Balance control during lateral load transfers over a slippery surface

    Microsoft Academic Search

    Robert D. Catena; Angela DiDomenico; Jacob J. Banks; Jack T. Dennerlein

    2011-01-01

    Few studies have measured balance control during manual material handling, and even fewer with environmental cofactors. This study examined the effect of different surface frictions during a stationary manual material handling task. Thirty-six healthy participants completed 180° lateral transfer tasks of a load over high- and low-friction surfaces (? = 0.86 and ? = 0.16, respectively). Balance measures, stance kinematics and lower extremity muscle

  18. Connexin26-mediated transfer of laterality cues in Xenopus

    PubMed Central

    Beyer, Tina; Thumberger, Thomas; Schweickert, Axel; Blum, Martin

    2012-01-01

    Summary A cilia-driven leftward flow of extracellular fluid breaks bilateral symmetry in the dorsal midline of the neurula stage vertebrate embryo. The left-specific Nodal signaling cascade in the lateral plate mesoderm (LPM) is key to asymmetric morphogenesis and placement of organs during subsequent development. The nature of the initial asymmetric cue(s) as well as the transfer of information from the midline to the left side has remained elusive. Gap junctional communication has been previously involved in Xenopus left-right (LR) development, however a function at cleavage stages was inferred from inhibitor experiments. Here we show by heptanol-mediated block of connexin function that flow stages during neurulation represent the critical time window. Flow in Xenopus occurs at the gastrocoel roof plate (GRP), a ciliated sheath of cells of mesodermal fate transiently positioned within the dorsal epithelial lining of the forming archenteron. We reasoned that endodermal cells immediately adjacent to the GRP are important for transfer of asymmetry. A systematic screen identified two connexin genes, Cx26 and Cx32, which were co-expressed in these lateral endodermal cells. Gain- and loss-of-function experiments pinpointed Cx26 as the critical connexin for LR development, while Cx32 had no effect on laterality. Importantly, GRP morphology, ciliation and flow were not affected in Cx26 morphants. Our results demonstrate a decisive role of Cx26 in the transfer of laterality cues from the GRP to the left LPM, providing a novel access to the identification of the initial asymmetric signal generated by flow. PMID:23213439

  19. Natural language processing using spreading activation and lateral inhibition

    SciTech Connect

    Pollack, J.

    1982-08-01

    The knowledge needed to process natural language comes from many sources. While the knowledge itself may be broken up modularly, into knowledge of syntax, semantics, etc., the actual processing should be completely integrated. This form of processing is not easily amenable to the type of processing done by serial von Neumann computers. This work in progress is an investigation of the use of a highly parallel, spreading activation and lateral inhibition network as a mechanism for integrated natural language processing.

  20. Restoration of congenitally missing maxillary lateral incisors using mini implants.

    PubMed

    Collins, Ron

    2013-11-01

    In this author's opinion, the advent of mini implants, or small diameter implants (SDIs) as they are more frequently being called, is becoming in many situations a viable alternative to the more traditional root form implants. They offer advantages of less cost, a more simplified placement technique, usually faster healing times, and generally less post-operative complications. A case presentation is given to demonstrate their usage for a narrow ridge application to restore congenitally missing maxillary lateral incisors. PMID:24428002

  1. Restoration of congenitally missing maxillary lateral incisors using mini implants.

    PubMed

    Collins, Ron

    2013-07-01

    In this author's opinion, the advent of mini implants, or small diameter implants (SDIs) as they are more frequently being called, are becoming in many situations a viable alternative to the more traditional root form implants. They offer advantages of less cost, a more simplified placement technique, usually faster healing times, and generally less post-operative complications. A case presentation is given to demonstrate their usage for a narrow ridge application to restore congenitally missing maxillary lateral incisors. PMID:24015452

  2. Examination of the Lateral Attenuation of Aircraft Noise

    NASA Technical Reports Server (NTRS)

    Plotkin, Kenneth J.; Hobbs, Christopher M.; Bradley, Kevin A.; Shepherd, Kevin P. (Technical Monitor)

    2000-01-01

    Measurements of the lateral attenuation of noise from aircraft operations at Denver International Airport were made at distances up to 2000 feet and elevation angles up to 27 degrees. Attenuation Calculated from modem ground impedance theory agrees well with average measured attenuation. The large variability between measured and predicted levels observed at small elevation angles is demonstrated to be due to refraction by wind and temperature gradients.

  3. Numerical modeling of centrifuge cyclic lateral pile load experiments

    Microsoft Academic Search

    Nikos Gerolymos; Sandra Escoffier; George Gazetas; Jacques Garnier

    2009-01-01

    To gain insight into the inelastic behavior of piles, the response of a vertical pile embedded in dry sand and subjected to\\u000a cyclic lateral loading was studied experimentally in centrifuge tests conducted in Laboratoire Central des Ponts et Chaussées.\\u000a Three types of cyclic loading were applied, two asymmetric and one symmetric with respect to the unloaded pile. An approximately\\u000a square-root

  4. Establishment of polarity in lateral organs of plants

    Microsoft Academic Search

    Yuval Eshed; Stuart F. Baum; John V. Perea; John L. Bowman

    2001-01-01

    Background: Asymmetric development of plant lateral organs initiates by partitioning of organ primordia into distinct domains along their adaxial\\/abaxial axis. A recent model proposes that a meristem-born signal, acting in a concentration-dependent manner, differentially activates PHABULOSA-like genes, which in turn suppress abaxial-promoting factors. As yet, no abaxial factors have been identified that when compromised give rise to adaxialized organs.Results: Single

  5. The lateral facies of ignimbrites at Laacher See volcano

    Microsoft Academic Search

    Rolf Schumacher; Hans-Ulrich Schmincke

    1990-01-01

    Valley-fill ignimbrites of the Middle Laacher See Tephra (MLST) in the proximal depositional fan south of Laacher See volcano are laterally continuous with fine-grained overbank-facies deposits, 0.5–1.5 m thick, covering higher elevations and interfluves between the paleovalleys. The overbank deposits consist of up to 12 ash layers, each 4–10 cm thick, which show internal structures typical of ash-flow transport, such

  6. Cornering stiffness estimation based on vehicle lateral dynamics

    Microsoft Academic Search

    C. Sierra; E. Tseng; A. Jain; H. Peng

    2006-01-01

    In this article, the cornering stiffness estimation problem based on the vehicle bicycle (one-track) model is studied. Both time-domain and frequency-domain-based methods are analyzed, aiming to estimate the effective cornering stiffness, defined as the ratio between the lateral force and the slip angle at the two axles. Several methods based on the bicycle model were developed, each having specific pros\\/cons

  7. Cofilin (ADF) Affects Lateral Contacts in F-actin

    Microsoft Academic Search

    Andrey A. Bobkov; Andras Muhlrad; Alexander Shvetsov; Sabrina Benchaar; Damon Scoville; Steven C. Almo; Emil Reisler

    2004-01-01

    The effect of yeast cofilin on lateral contacts between protomers of yeast and skeletal muscle actin filaments was examined in solution. These contacts are presumably stabilized by the interactions of loop 262-274 of one protomer with two other protomers on the opposite strand in F-actin. Cofilin inhibited several-fold the rate of interstrand disulfide cross-linking between Cys265 and Cys374 in yeast

  8. Amyotrophic lateral sclerosis: lessons from mouse and human genetics

    Microsoft Academic Search

    Robert H Brown

    2001-01-01

    Amyotrophic lateral sclerosis (ALS) is a progressive, uniformly fatal, adult-onset degenerative disorder of motor neurons. It is now clear that some cases arise as dominant traits because of mutations in a gene encoding the cytosolic, Cu\\/Zn superoxide dismutase (SOD1). Several lines of evidence favor the view that the mutations confer one or more neurotoxic properties on the mutant protein. The

  9. The source of laterally transferred genes in bacterial genomes

    Microsoft Academic Search

    Vincent Daubin; Emmanuelle Lerat; Guy Perrière

    2003-01-01

    BACKGROUND: Laterally transferred genes have often been identified on the basis of compositional features that distinguish them from ancestral genes in the genome. These genes are usually A+T-rich, arguing either that there is a bias towards acquiring genes from donor organisms having low G+C contents or that genes acquired from organisms of similar genomic base compositions go undetected in these

  10. The Far Lateral Approach to Lumbar Disc Herniations

    Microsoft Academic Search

    F. Porchet; H. Fankhauser; N. DE TRIBOLET

    \\u000a The diagnosis of extreme lateral lumbar disc herniation (ELLDH) as a cause of lumbar radiculopathy was first described by\\u000a Abdullah in 1974 [1]. This discal pathology has been recognized for many years as an occasional cause of negative disc exploration and immediate\\u000a failure of classical disc surgery in sciatica [1,18, 24, 25, 29, 31, 30, 31, 33, 35, 41]. Only

  11. Lateral migration of linear dunes in the Strzelecki Desert, Australia

    USGS Publications Warehouse

    Rubin, D.M.

    1990-01-01

    Preferential accumulation of sand on east-facing flanks indicates that the dunes migrated eastward several metres during the Holocene. Moreover, the west-facing flanks of some dunes have experienced a minimum of tens of metres of erosion. This asymmetric erosion and deposition were caused by dune obliquity and lateral migration that may have begun as early as the Pleistocene. Dunes in the Strzelecki Desert and in the adjacent Simpson Desert display a variety of grossly different internal structures. -from Author

  12. An Animal Model of Oral Dysphagia in Amyotrophic Lateral Sclerosis

    Microsoft Academic Search

    Teresa E. Lever; Ambre Gorsek; Kathleen T. Cox; Kevin F. O’Brien; Norman F. Capra; Monica S. Hough; Alexander K. Murashov

    2009-01-01

    Relatively little is known about the underlying neuropathology of dysphagia in amyotrophic lateral sclerosis (ALS); thus,\\u000a effective treatments remain elusive. Tremendous progress toward understanding and treating dysphagia in ALS may be possible\\u000a through the use of an animal model of dysphagia in ALS research; however, no such animal model currently exists. The most\\u000a logical candidate to consider is the SOD1-G93A

  13. Improved design of micromachined lateral suspensions using intermediate frames

    Microsoft Academic Search

    W. T. Pike; S. Kumar

    2007-01-01

    A complete analysis of the translational and rotational modes of a model lateral suspension is presented. The derived formulae quantify spurious-mode resonant frequencies for cross-axis translation and rotation, and on-axis translation, and can provide very simple expressions for the rejection ratios in terms of the geometry of the suspensions. It is shown that the introduction of intermediate frames, coupling equivalent

  14. Amyotrophic lateral sclerosis models and human neuropathology: similarities and differences

    Microsoft Academic Search

    Shinsuke Kato

    2008-01-01

    Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease that primarily involves the motor neuron system.\\u000a The author initially summarizes the principal features of human ALS neuropathology, and subsequently describes in detail ALS\\u000a animal models mainly from the viewpoint of pathological similarities and differences. ALS animal models in this review include\\u000a strains of rodents that are transgenic for superoxide dismutase

  15. Lateral inhibition between spatially adjacent spatial-frequency channels?

    Microsoft Academic Search

    Dov Sagi; Shaul Hochstein

    1985-01-01

    A new lateral inhibitory phenomenon is suggested between spatially neighboring channels that detect similar spatial frequencies.\\u000a This mechanism tends to enhance the apparent contrast of gratings at their boundaries, and Mach-band-type effects are demonstrated\\u000a at the edge of a suprathreshold half-field grating. We studied the dependence of this effect on the grating parameters of\\u000a spatial frequency and contrast. The grating

  16. Spatial frequency response function of lateral geniculate neurons

    Microsoft Academic Search

    Allan A. Harkavy

    1975-01-01

    In 1969 Campbell et al. reported five spatial frequency response curves. Here a good curve fit is found to three of them based on a model of lateral inhibition from four off-centered geniculate cells whose receptive fields were at a common distance from that of an on-centered geniculate cell. The distance was 0.5° when the experimental curve was fitted by

  17. Amyotrophic lateral sclerosis in southern Greece: an epidemiologic study.

    PubMed

    Kalfakis, N; Vassilopoulos, D; Voumvourakis, C; Ndjeveleka, M; Papageorgiou, C

    1991-01-01

    All amyotrophic lateral sclerosis cases hospitalized over a 25-year period in the University Department of Neurology in Athens were surveyed, with emphasis given to the occupation of the patients and the geographic distribution of the disease. The results showed an overrepresentation of farmers among patients and an aggregation of cases in the region of Cephalonia. These findings might suggest that environmental factors could be involved in the etiology of the disease. PMID:1745326

  18. Dielectrically isolated lateral merged PiN Schottky (LMPS) diodes

    Microsoft Academic Search

    Ravishankar Sunkavalli; B. Jayant Baliga; Akihiro Tamba

    1997-01-01

    The concept of the RESURF DI lateral merged PiN Schottky (LMPS) diodes is introduced and experimentally demonstrated. The LMPS diode combines the advantages of fast switching times of Schottky diodes with the low forward drops exhibited by LPiN diodes. An increase in the ratio of Schottky area relative to the p-n junction area is shown to result in superior reverse

  19. Apoptotic cell clearance in chronic inflammation of lateral neck cysts

    Microsoft Academic Search

    Wieslaw Dobros; Karolina Burda; Krzysztof Guzik; Joanna Koziel; Jan Potempa

    The mechanism driving accumulation of large numbers of apoptotic and necrotic neutrophils in inflamed lateral neck cysts (LNC),\\u000a in the absence of infection, remains obscure. The cellular content of cysts obtained from 17 patients was co-cultured with\\u000a human macrophages. Phagocytosis levels of cyst-derived neutrophils were determined and compared to the uptake of spontaneously\\u000a apoptotic neutrophils. Simultaneously, the expression of cytokines

  20. Amyotrophic lateral sclerosis: new genes, new models, and new mechanisms

    PubMed Central

    Dion, Patrick A.; Rouleau, Guy A.

    2011-01-01

    Research aimed at understanding amyotrophic lateral sclerosis (ALS) has seen exceptional growth in the past few years. New genes, new models, and new mechanisms have not only improved our understanding, but also contributed to the increasing complexity of ALS pathogenesis. The focus of this piece is to highlight some of the more notable developments in the field and to encourage a re-appreciation for the superoxide dismutase 1 (SOD1) mouse models. PMID:21941597

  1. Transport Properties of Graphene with Nanoscale Lateral Resolution

    Microsoft Academic Search

    Filippo Giannazzo; Vito Raineri; Emanuele Rimini

    \\u000a Graphene, a two-dimensional sheet of C atoms, is the object of many scientific studies, especially due to the outstanding\\u000a electronic properties. The behavior of graphene based nano-devices or mesoscopic devices is ultimately influenced by the lateral\\u000a homogeneity of the carrier density, electron mean free path, and mobility on the layer. This chapter reviews the main applications\\u000a of scanning probe methods

  2. Economic viability of multiple-lateral horizontal wells

    E-print Network

    Smith, Christopher Jason

    1995-01-01

    May 1995 Major Subject: Petroleum Engineering ECONOMIC VIABILITY OF MULTIPLE-LATERAL HORIZONTAL WELLS A Thesis by CHRISTOPHER JASON SMITH Submitted to Texas Aft M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE Approved as to style and content by: Michael J. Economides (Chair of Committee) Thomas A. Blasingame (Member) Robert R. Berg (Member) James E. ussell (Head of Department) May 1995 Ma)or Subject: Petroleum Engineering ABSTRACT Fconomic...

  3. Altered Reactivity of Superoxide Dismutase in Familial Amyotrophic Lateral Sclerosis

    Microsoft Academic Search

    Martina Wiedau-Pazos; Joy J. Goto; Shahrooz Rabizadeh; Edith B. Gralla; James A. Roe; Michael K. Lee; Joan S. Valentine; Dale E. Bredesen

    1996-01-01

    A subset of individuals with familial amyotrophic lateral sclerosis (FALS) possesses dominantly inherited mutations in the gene that encodes copper-zinc superoxide dismutase (CuZnSOD). A4V and G93A, two of the mutant enzymes associated with FALS, were shown to catalyze the oxidation of a model substrate (spin trap 5,5'-dimethyl-1-pyrroline N-oxide) by hydrogen peroxide at a higher rate than that seen with the

  4. LiTaO3 lateral field resonators

    Microsoft Academic Search

    R. W. Weinert; B. R. McAvoy; M. M. Driscoll; R. A. Moore; H. F. Tiersten

    1989-01-01

    High overtone lateral field resonators, fabricated on -16.5° rotated Y-cut LiTaO3 plates, were examined for high- Q operation in the frequency range between 300 MHz and 1000 MHz. QF products of up to 5×1013 for unmounted plates and for hard-mounted plates have been measured. The QF product is higher than can be achieved with quartz, and the self-noise levels of

  5. Planar Nanoscale Capacitors from Laterally Stacked Graphene - Boron Nitride Layers

    NASA Astrophysics Data System (ADS)

    Ozcelik, V. Ongun; Durgun, Engin; Ciraci, Salim

    2015-03-01

    We propose a nanoscale planar capacitor model consisting of laterally stacked two-dimensional insulating BN layers placed between two commensurate and metallic graphene layers. First-principles calculations of structure optimized total energy and self-consistent field potential performed on these nanoscale capacitors for different levels of charging and different number of BN layers mark the values of capacitance per unit mass, which are larger than those measured values for the supercapacitors made from other carbon based materials.

  6. Load path distribution within the pelvic structure under lateral loading

    Microsoft Academic Search

    R. S. Salzar; D. Genovese; C. R. Bass; J. R. Bolton; H. Guillemot; A. M. Damon; J. R. Crandall

    2009-01-01

    Lateral loading of the pelvis occurs for both vehicle occupants struck during side impacts as well as pedestrians. This research investigated the load distribution through the anterior (i.e. pubic symphysis) and posterior (i.e. sacrum) aspects of the pelvis for both acetabular and iliac loading. Sixteen male post-mortem human surrogate pelves were tested in quasi-static (n = 4) anddynamic (n =

  7. Differences in lateral gene transfer in hypersaline versus thermal environments

    Microsoft Academic Search

    Matthew E Rhodes; John R Spear; Aharon Oren; Christopher H House

    2011-01-01

    Background  The role of lateral gene transfer (LGT) in the evolution of microorganisms is only beginning to be understood. While most\\u000a LGT events occur between closely related individuals, inter-phylum and inter-domain LGT events are not uncommon. These distant\\u000a transfer events offer potentially greater fitness advantages and it is for this reason that these \\

  8. Abnormal somatosensory evoked potentials in amyotrophic lateral sclerosis.

    PubMed

    Dasheiff, R M; Drake, M E; Brendle, A; Erwin, C W

    1985-04-01

    A patient with typical clinical and electromyographic features of amyotrophic lateral sclerosis (ALS) was found to have abnormal somatosensory evoked potentials (SEPs). Evoked responses are generally considered to be normal in ALS despite occasional pathological and clinical evidence of sensory involvement. Thus, abnormal SEPs are considered to argue against a diagnosis of ALS. Based on the present case and a review of the literature, we suggest that abnormal SEPs need not exclude a diagnosis of ALS. PMID:2579797

  9. Change in Perceived Age in Middle and Later Life

    ERIC Educational Resources Information Center

    Ward, Russell A.

    2013-01-01

    Analyses examine change in the age people "feel" ("felt age") and "would like to be" ("ideal age") (relative to current age) in middle and later life. Data are from 1,815 respondents in two waves (1995-96, 2004-06) of the Midlife in the United States Survey (MIDUS) who were age 40+ at Wave 1. In aggregate, people feel about the same amount younger…

  10. Lateral line, otic and epibranchial placodes: developmental and evolutionary links?

    PubMed Central

    Baker, Clare V. H.; O’Neill, Paul; McCole, Ruth B.

    2014-01-01

    Two embryonic cell populations, the neural crest and cranial ectodermal placodes, between them give rise to many of the unique characters of vertebrates. Neurogenic placode derivatives are vital for sensing both external and internal stimuli. In this speculative review, we discuss potential developmental and evolutionary relationships between two placode series that are usually considered to be entirely independent: lateral line placodes, which form the mechanosensory and electroreceptive hair cells of the anamniote lateral line system as well as their afferent neurons, and epibranchial placodes (geniculate, petrosal and nodose), which form Phox2b+ visceral sensory neurons with input from both the external and internal environment. We illustrate their development using molecular data we recently obtained in shark embryos, and we describe their derivatives, including the possible geniculate placode origin of a mechanosensory sense organ associated with the first pharyngeal pouch/cleft (the anamniote spiracular organ/amniote paratympanic organ). We discuss how both lateral line and epibranchial placodes can be related in different ways to the otic placode (which forms the inner ear and its afferent neurons), and how both are important for protective somatic reflexes. Finally, we put forward a highly speculative proposal about the original function of the cells whose evolutionary descendants today include the derivatives of the lateral line, otic and epibranchial placodes, namely that they produced sensory receptors and neurons for Phox2b-dependent protective reflex circuits. We hope this review will stimulate both debate and a fresh look at possible developmental and evolutionary relationships between these seemingly disparate and independent placodes. PMID:17638322

  11. LATERAL ABDOMINAL MUSCLE SYMMETRY IN COLLEGIATE SINGLE-SIDED ROWERS

    PubMed Central

    Gill, Norman W.; Mason, Beth E.; Gerber, J. Parry

    2012-01-01

    Purpose/Background: Although side to side symmetry of lateral abdominal muscle thickness has been established in healthy individuals, it is unknown whether abdominal muscle symmetry exists in athletes with asymmetrical physiological demands, such as those of single-sided rowers. The purpose of this study was to examine the oarside versus the non-oarside lateral abdominal musculature thickness in collegiate single-sided rowers, as measured by ultrasound imaging (USI). Methods: The study was a prospective, cross-sectional, observational design. Thirty collegiate crew team members (17 males, 13 females, age 19.8±1.2 years) characterized as single-sided rowers participated. Resting muscle thickness measurements of the transversus abdominis (TrA), internal oblique (IO), and external oblique (EO) muscles were obtained via USI. Comparisons of absolute and relative muscle thickness between oarside and non-oarside were performed using paired t-tests. Potential differences based on gender, rowing experience, and history of low back pain were investigated using mixed model analysis of variance. Results: There were no clinically significant differences in absolute or relative thickness of the TrA, IO or EO on the oarside versus the non-oarside. There were no significant side to side differences in the relative muscle thickness of the TrA, IO or EO based on gender, rowing experience, or history of low back pain. Conclusions: In this sample of single-sided rowing athletes, no clinically significant side to side differences in lateral abdominal muscle thickness were observed. Despite the asymmetrical functional demands of single-sided rowers in this study, thickness of the lateral abdominal muscles was symmetric. Level of Evidence: 4 PMID:22319677

  12. Early Math Matters: Kindergarten Number Competence and Later Mathematics Outcomes

    Microsoft Academic Search

    Nancy C. Jordan; David Kaplan; Chaitanya Ramineni; Maria N. Locuniak

    2009-01-01

    Children’s number competencies over 6 time points, from the beginning of kindergarten to the middle of 1st grade, were examined in relation to their mathematics achievement over 5 later time points, from the end of 1st grade to the end of 3rd grade. The relation between early number competence and mathematics achievement was strong and significant throughout the study period.

  13. Non-local spin injection in lateral spin valves.

    SciTech Connect

    Ji, Y.; Hoffmann, A.; Jiang, J. S.; Pearson, J. E.; Bader, S. D.

    2007-03-07

    Injection and detection of non-local spin accumulation have been demonstrated in a series of nanoscale metallic lateral spin valves, fabricated by electron beam lithography. A distinct feature of non-local spin valves is that a pure spin current without charge flow can be generated. The measured spin signal is only sensitive to the relative orientations of the detector spin and the spin accumulation, and exhibits little charge background voltage. The injection polarizations of the interfaces and the spin diffusion lengths of the non-magnetic components have been determined by measuring the spin signals from a set of similar spin valves with varying injector and detector separations. In Py/Au/Py lateral spin valves, where Py is permalloy, the injection polarization across the Py/Au interface is 3%, and the spin diffusion length of Au is 63 {+-} 15 nm at 10 K. In Co/Cu/Co lateral spin valves, the injection polarization across the Co/Cu interface is increased to over 7%, due to better interfacial quality compared with Py/Au. The spin diffusion length of Cu is 200 {+-} 20 nm at 10 K, and > 110 nm at 300 K.

  14. Mechanical Response of the Basilar Membrane to Lateral Micromanipulation

    NASA Astrophysics Data System (ADS)

    Newburg, S. O.; Zosuls, A.; Barbone, P. E.; Mountain, D. C.

    2009-02-01

    The role of wave propagation in the cochlea can be founded on detailed knowledge of the mechanical properties of the basilar membrane. In this study, measurements of lateral point stiffness and longitudinal coupling were made on gerbil basilar membranes in vitro. We designed an integrated optical imaging system and basilar membrane manipulator, in which a calibrated glass micropipette is used to displace the basilar membrane laterally. Because the tissue deformations occur in the optical plane of the microscope objective, detailed images of the movement of the basilar membrane ultrastructure are obtained. The motion is measured by matching features in successive images. It was found that the lateral point stiffness in the arcuate zone is 0.2-0.5 N/m, in the pectinate zone is 2-3 N/m, and increases to over 10 N/m near the spiral ligament. To compute the longitudinal coupling, the displacement field was measured quantitatively using image registration. It was found that the tissue in compression has a space constant of 7.6 ?m and the tissue in tension has a longer space constant of 10.5 ?m. The correlation of mechanical properties to anatomically distinct regions of the basilar membrane supports the conclusion that these regions serve different functional roles.

  15. Balance control during lateral load transfers over a slippery surface.

    PubMed

    Catena, Robert D; DiDomenico, Angela; Banks, Jacob J; Dennerlein, Jack T

    2011-11-01

    Few studies have measured balance control during manual material handling, and even fewer with environmental cofactors. This study examined the effect of different surface frictions during a stationary manual material handling task. Thirty-six healthy participants completed 180° lateral transfer tasks of a load over high- and low-friction surfaces (? = 0.86 and ? = 0.16, respectively). Balance measures, stance kinematics and lower extremity muscle activities were measured. Success during the novel slippery surface dichotomised our population, allowing us to investigate beneficial techniques to lateral load transfers over the slippery surface. Stance width reduction by 8 cm and 15° of additional external foot rotation towards the load were used to counter the imbalance created by the slippery surface. There was no clear alteration to lower extremity muscular control to adapt to a slippery surface. Changes in stance seemed to be used successfully to counter a slippery surface during lateral load transfers. STATEMENT OF RELEVANCE: Industries requiring manual material handling where slippery conditions are potentially present have a noticeable increase in injuries. This study suggests stance configuration, more so than any other measure of balance control, differentiates vulnerability to imbalance during material handling over a slippery surface. PMID:22026949

  16. Lateralized discrimination of emotional scenes in peripheral vision.

    PubMed

    Calvo, Manuel G; Rodríguez-Chinea, Sandra; Fernández-Martín, Andrés

    2015-03-01

    This study investigates whether there is lateralized processing of emotional scenes in the visual periphery, in the absence of eye fixations; and whether this varies with emotional valence (pleasant vs. unpleasant), specific emotional scene content (babies, erotica, human attack, mutilation, etc.), and sex of the viewer. Pairs of emotional (positive or negative) and neutral photographs were presented for 150 ms peripherally (?6.5° away from fixation). Observers judged on which side the emotional picture was located. Low-level image properties, scene visual saliency, and eye movements were controlled. Results showed that (a) correct identification of the emotional scene exceeded the chance level; (b) performance was more accurate and faster when the emotional scene appeared in the left than in the right visual field; (c) lateralization was equivalent for females and males for pleasant scenes, but was greater for females and unpleasant scenes; and (d) lateralization occurred similarly for different emotional scene categories. These findings reveal discrimination between emotional and neutral scenes, and right brain hemisphere dominance for emotional processing, which is modulated by sex of the viewer and scene valence, and suggest that coarse affective significance can be extracted in peripheral vision. PMID:25511169

  17. Laterality Differences in Cerebellar-Motor Cortex Connectivity.

    PubMed

    Schlerf, John E; Galea, Joseph M; Spampinato, Danny; Celnik, Pablo A

    2015-07-01

    Lateralization of function is an important organizational feature of the motor system. Each effector is predominantly controlled by the contralateral cerebral cortex and the ipsilateral cerebellum. Transcranial magnetic stimulation studies have revealed hemispheric differences in the stimulation strength required to evoke a muscle response from the primary motor cortex (M1), with the dominant hemisphere typically requiring less stimulation than the nondominant. The current study assessed whether the strength of the connection between the cerebellum and M1 (CB-M1), known to change in association with motor learning, have hemispheric differences and whether these differences have any behavioral correlate. We observed, in right-handed individuals, that the connection between the right cerebellum and left M1 is typically stronger than the contralateral network. Behaviorally, we detected no lateralized learning processes, though we did find a significant effect on the amplitude of reaching movements across hands. Furthermore, we observed that the strength of the CB-M1 connection is correlated with the amplitude variability of reaching movements, a measure of movement precision, where stronger connectivity was associated with better precision. These findings indicate that lateralization in the motor system is present beyond the primary motor cortex, and points to an association between cerebellar M1 connectivity and movement execution. PMID:24436320

  18. Lateralization of social cognition in the domestic chicken (Gallus gallus)

    PubMed Central

    Daisley, Jonathan Niall; Mascalzoni, Elena; Rosa-Salva, Orsola; Rugani, Rosa; Regolin, Lucia

    2008-01-01

    In this paper, we report on the ongoing work in our laboratories on the effect of lateralization produced by light exposure in the egg on social cognition in the domestic chick (Gallus gallus). The domestic chick possesses a lateralized visual system. This has effects on the chick's perception towards and interaction with its environment. This includes its ability to live successfully within a social group. We show that there is a tendency for right brain hemisphere dominance when performing social cognitive actions. As such, chicks show a left hemispatial bias for approaching a signalled target object, tend to perceive gaze and faces of human-like masks more effectively when using their left eye, are able to inhibit a pecking response more effectively when viewing a neighbour tasting a bitter substance with their left eye, and are better able to perform a transitive inference task when exposed to light in the egg and when forced to use their left eye only compared to dark-hatched or right eye chicks. Some of these effects were sex specific, with male chicks tending to show an increased effect of lateralization on their behaviours. These data are discussed in terms of overall social cognition in group living. PMID:19064355

  19. Cofilin (ADF) affects lateral contacts in F-actin.

    PubMed

    Bobkov, Andrey A; Muhlrad, Andras; Shvetsov, Alexander; Benchaar, Sabrina; Scoville, Damon; Almo, Steven C; Reisler, Emil

    2004-03-12

    The effect of yeast cofilin on lateral contacts between protomers of yeast and skeletal muscle actin filaments was examined in solution. These contacts are presumably stabilized by the interactions of loop 262-274 of one protomer with two other protomers on the opposite strand in F-actin. Cofilin inhibited several-fold the rate of interstrand disulfide cross-linking between Cys265 and Cys374 in yeast S265C mutant F-actin, but enhanced excimer formation between pyrene probes attached to these cysteine residues. The possibility that these effects are due to a translocation of the C terminus of actin by cofilin was ruled out by measurements of fluorescence resonance energy transfer (FRET) from tryptophan residues and ATP to acceptor probes at Cys374. Such measurements did not reveal cofilin-induced changes in FRET efficiency, suggesting that changes in Cys265-Cys374 cross-linking and excimer formation stem from the perturbation of loop 262-274 by cofilin. Changes in lateral interactions in F-actin were indicated also by the cofilin-induced partial release of rhodamine phalloidin. Disulfide cross-linking of S265C yeast F-actin inhibited strongly and reversibly the release of rhodamine phalloidin by cofilin. Overall, this study provides solution evidence for the weakening of lateral interactions in F-actin by cofilin. PMID:15001354

  20. [The clinical effect of lateral wedge on hemiplegic weight bearing].

    PubMed

    Kakou, Hiroaki; Nagao, Yoko; Omine, Saburo; Ochi, Mitsuhiro; Wada, Futoshi; Hachisuka, Kenji; Togami, Hidenori

    2003-12-01

    The purpose of this study was to investigate the influence of the lateral wedge on asymmetrical weight bearing and posture in hemiplegic gait. The subjects were 2-female and 4-male moderate stroke patients, average age 54 +/- 6 yr. The time from onset was 127 +/- 69.7 days. A 7 mm-thick wedged insole was applied to the affected side for a week. Before and after that, the vertical ground reaction force, single supporting period and side movement of the trunk were recorded during walking. As a result, we found that the vertical ground reaction ratio and single supporting period ratio of the affected side (affected/unaffected) were significantly increased (P < 0.05), and also that the lateral sway of the trunk was remarkably decreased (P < 0.05). Our results indicate that the application of the lateral wedge for a week improved asymmetrical weight bearing and gait ability in moderate hemiplegic patients. Also we believe that a randomly sampled comparison study should be performed in the near future. PMID:14692346

  1. Thoracoscopic and laparoscopic radical esophagectomy with lateral-prone position

    PubMed Central

    Ma, Zheng; Niu, Huijun

    2014-01-01

    With 20 years of development, minimally-invasive treatment for esophageal cancer has been widely spread. However, surgeons have not reached consensus about the optimal minimally-invasive operation method, or whether the effect of radical lymph nodes dissection is comparable to the traditional open procedure. Thoracoscopic esophagectomy with lateral-prone position combines the advantages of both lateral position (allowing quick conversion to open procedure) and prone position (good visual area and complete lymphadenectomy). Together with laparoscopic abdominal lymphadenectomy, gastric tube formation and jejunostomy, this approach provides an easier way for minimally-invasive radical esophagectomy. In this article, approaches for thoracoscopic esophagectomy with lateral-prone position and total mediastinal lymphadenectomy, combined with totally laparoscopic gastric mobilization, abdominal lymphadenectomy, gastric tube formation and jejunostomy, will be presented by video instructions. All the procedures were under the rule of radical lymphadenectomy. Cervical lymph nodes dissection and esophago-gastrostomy were the same as those in open procedure, which will not be discussed here. PMID:24605231

  2. Lateral manipulation of atomic vacancies in ultrathin insulating films.

    PubMed

    Li, Zhe; Chen, Hsin-Yi Tiffany; Schouteden, Koen; Lauwaet, Koen; Janssens, Ewald; Van Haesendonck, Chris; Pacchioni, Gianfranco; Lievens, Peter

    2015-05-26

    During the last 20 years, using scanning tunneling microscopy (STM) and atomic force microscopy, scientists have successfully achieved vertical and lateral repositioning of individual atoms on and in different types of surfaces. Such atom manipulation allows the bottom-up assembly of novel nanostructures that can otherwise not be fabricated. It is therefore surprising that controlled repositioning of virtual atoms, i.e., atomic vacancies, across atomic lattices has not yet been achieved experimentally. Here we use STM at liquid helium temperature (4.5 K) to create individual Cl vacancies and subsequently to laterally manipulate them across the surface of ultrathin sodium chloride films. This allows monitoring the interactions between two neighboring vacancies with different separations. Our findings are corroborated by density functional theory calculations and STM image simulations. The lateral manipulation of atomic vacancies opens up a new playground for the investigation of fundamental physical properties of vacancy nanostructures of any size and shape and their coupling with the supporting substrate, and of the interaction of various deposits with charged vacancies. PMID:25769024

  3. The role of laterally transferred genes in adaptive evolution

    PubMed Central

    Marri, Pradeep Reddy; Hao, Weilong; Golding, G Brian

    2007-01-01

    Background Bacterial genomes develop new mechanisms to tide them over the imposing conditions they encounter during the course of their evolution. Acquisition of new genes by lateral gene transfer may be one of the dominant ways of adaptation in bacterial genome evolution. Lateral gene transfer provides the bacterial genome with a new set of genes that help it to explore and adapt to new ecological niches. Methods A maximum likelihood analysis was done on the five sequenced corynebacterial genomes to model the rates of gene insertions/deletions at various depths of the phylogeny. Results The study shows that most of the laterally acquired genes are transient and the inferred rates of gene movement are higher on the external branches of the phylogeny and decrease as the phylogenetic depth increases. The newly acquired genes are under relaxed selection and evolve faster than their older counterparts. Analysis of some of the functionally characterised LGTs in each species has indicated that they may have a possible adaptive role. Conclusion The five Corynebacterial genomes sequenced to date have evolved by acquiring between 8 – 14% of their genomes by LGT and some of these genes may have a role in adaptation. PMID:17288581

  4. Time-resolved luminescent lateral flow assay technology.

    PubMed

    Song, Xuedong; Knotts, Michael

    2008-09-26

    We here report a detection technology that integrates highly sensitive time-resolved luminescence technique into lateral flow assay platform to achieve excellent detection performance with low cost. We have developed very bright, surface-functionalized and mono-dispersed phosphorescent nanoparticles of long lifetime under ambient conditions. The phosphorescent nanoparticles have been used to conjugate with monoclonal antibody for C-reactive protein (CRP), an inflammatory biomarker. Lateral flow immunoassay devices have been developed using the conjugate for highly sensitive detection of CRP. The CRP assay can achieve a detection sensitivity of <0.2 ngmL(-1) in serum with a linear response from 0.2 to 200 ngmL(-1) CRP. We have also developed a low cost time-resolved luminescence reader for the lateral flow immunoassay (LFIA) devices. The reader does not use expensive band pass filter and still provide very low detection background and high detection sensitivity on solid substrates such as nitrocellulose membranes. The reader can detect less than 2.5 ng phosphorescent particles captured on a nitrocellulose membrane strip with more than three orders of magnitude linear detection dynamic range. The technology should find a number of applications, ranging from clinical diagnostics, detection of chemical and biological warfare agents, to food and environmental monitoring. PMID:18790120

  5. Lateral downflows in sunspot penumbral filaments and their temporal evolution

    E-print Network

    Pozuelo, S Esteban; Rodriguez, J de la Cruz

    2015-01-01

    We study the temporal evolution of downflows observed at the lateral edges of penumbral filaments in a sunspot located very close to the disk center. Our analysis is based on a sequence of nearly diffraction-limited spectropolarimetric scans of the Fe I 6173 A line taken with the CRISP instrument at the Swedish 1-m Solar Telescope. We compute Dopplergrams from the observed intensity profiles using line bisectors and filter the resulting velocity maps for subsonic oscillations. Lateral downflows appear everywhere in the center-side penumbra as small, weak patches of redshifts next to or along the edges of blueshifted flow channels. These patches have an intermittent life and undergo mergings and fragmentations quite frequently. The lateral downflows move together with the hosting filaments and react to their shape variations, very much resembling the evolution of granular convection in the quiet Sun. There is a good relation between brightness and velocity of the flow structures in the center-side penumbra, wi...

  6. Centrifuge modelling of lateral pipeline/soil interaction -- Phase 2

    SciTech Connect

    Paulin, M.J.; Phillips, R. [Memorial Univ. of Newfoundland, St. John`s, Newfoundland (Canada). Centre for Cold Ocean Resources Engineering; Boivin, R. [NOVA Corp., Calgary, Alberta (Canada). NOVA Gas Transmission Limited Division

    1995-12-31

    An ongoing research program is investigating the load transfer behavior of buried pipelines subjected to lateral soil movement in cohesive soil. Phase 1 of this study, reported to OMAE `92, demonstrated that the centrifuge technique was appropriate for this application in determining the interaction conditions for the lateral loading of pipelines. Limited control of the shear strength masked geometric effects (trench width and burial depth) on the interaction factors and desiccation affected the interpretation of some of the interaction factors. The Phase 2 study investigated the geometric effects of pipeline soil cover, ditch width and also displacement rate. The study included a ``modelling of models`` test to verify the reliability of the centrifuge modelling technique. This paper addresses two issues: (1) The Phase 1 soil strength profiles and interaction factors were reanalyzed based on an improved understanding of the soil conditions at the time of testing; (2) A selection of the Phase 2 results are presented for a 0.95m diameter pipeline subjected to lateral soil movement. The program results are discussed and compared with current pipeline/soil interaction analysis methods.

  7. An experimental investigation into lateral pipeline/soil interaction

    SciTech Connect

    Paulin, M.J.; Phillips, R. [Memorial Univ. of Newfoundland, St. John`s, Newfoundland (Canada). Centre for Cold Ocean Resources Engineering; Boivin, R. [Nova Gas Transmission Ltd., Calgary, Alberta (Canada)

    1996-12-01

    In 1991, Nova Gas Transmission Limited began an experimental research program using centrifuge modeling to study the load transfer behavior of buried pipelines subjected to lateral soil movement. Phase 2 of this research program continued to examine laterally displacing pipeline/soil interaction. The six main objectives of this phase were to investigate: (1) the effect of pipeline soil cover; (2) the effect of ditch width; (3) the effect of interaction rate; (4) a modeling of models to verify the centrifuge modeling technique; (5) the effect of preconsolidation stress of the soil; and (6) the effect of different backfills. The data and preliminary analysis of objectives 1--4 were presented at OMAE `95. This paper addresses two issues: (1) the authors present new experimental test results obtained since the last OMAE meeting for a prototype pipeline (0.95m diameter) subjected to lateral soil movement under a 0.8m pipeline cover depth. These test results were obtained for interaction rates ranging from approximately 0.35 to 275m/year, in soil subjected to one dimensional preconsolidation stresses of 160 and 400 kPa, and for pipelines with a variety of backfills; (2) the authors discuss the phase 2 results through comparison with current pipeline/soil interaction analysis methods, through comparison with conventional geotechnical analysis results, and through observed trends in the data.

  8. Lateralization of Cognitive Functions in Aphasia after Right Brain Damage

    PubMed Central

    Ha, Ji-Wan; Hwang, Yu Mi; Sim, Hyunsub

    2012-01-01

    Purpose The lateralization of cognitive functions in crossed aphasia in dextrals (CAD) has been explored and compared mainly with cases of aphasia with left hemisphere damage. However, comparing the neuropsychological aspects of CAD and aphasia after right brain damage in left-handers (ARL) could potentially provide more insights into the effect of a shift in the laterality of handedness or language on other cognitive organization. Thus, this case study compared two cases of CAD and one case of ARL. Materials and Methods The following neuropsychological measures were obtained from three aphasic patients with right brain damage (two cases of CAD and one case of ARL); language, oral and limb praxis, and nonverbal cognitive functions (visuospatial neglect and visuospatial construction). Results All three patients showed impaired visuoconstructional abilities, whereas each patient showed a different level of performances for oral and limb praxis, and visuospatial neglect. Conclusion Based on the analysis of these three aphasic patients' performances, we highlighted the lateralization of language, handedness, oral and limb praxis, visuospatial neglect and visuospatial constructive ability in aphasic patients with right brain damage. PMID:22476990

  9. Medio-Lateral Postural Instability in Subjects with Tinnitus

    PubMed Central

    Kapoula, Zoi; Yang, Qing; Lê, Thanh-Thuan; Vernet, Marine; Berbey, Nolwenn; Orssaud, Christophe; Londero, Alain; Bonfils, Pierre

    2011-01-01

    Background: Many patients show modulation of tinnitus by gaze, jaw or neck movements, reflecting abnormal sensorimotor integration, and interaction between various inputs. Postural control is based on multi-sensory integration (visual, vestibular, somatosensory, and oculomotor) and indeed there is now evidence that posture can also be influenced by sound. Perhaps tinnitus influences posture similarly to external sound. This study examines the quality of postural performance in quiet stance in patients with modulated tinnitus. Methods: Twenty-three patients with highly modulated tinnitus were selected in the ENT service. Twelve reported exclusively or predominately left tinnitus, eight right, and three bilateral. Eighteen control subjects were also tested. Subjects were asked to fixate a target at 40?cm for 51?s; posturography was performed with the platform (Technoconcept, 40 Hz) for both the eyes open and eyes closed conditions. Results: For both conditions, tinnitus subjects showed abnormally high lateral body sway (SDx). This was corroborated by fast Fourrier Transformation (FFTx) and wavelet analysis. For patients with left tinnitus only, medio-lateral sway increased significantly when looking away from the center. Conclusion: Similarly to external sound stimulation, tinnitus could influence lateral sway by activating attention shift, and perhaps vestibular responses. Poor integration of sensorimotor signals is another possibility. Such abnormalities would be accentuated in left tinnitus because of the importance of the right cerebral cortex in processing both auditory–tinnitus eye position and attention. PMID:21647364

  10. Lateral Diffusion of Nutrients by Mammalian Herbivores in Terrestrial Ecosystems

    PubMed Central

    Wolf, Adam; Doughty, Christopher E.; Malhi, Yadvinder

    2013-01-01

    Animals translocate nutrients by consuming nutrients at one point and excreting them or dying at another location. Such lateral fluxes may be an important mechanism of nutrient supply in many ecosystems, but lack quantification and a systematic theoretical framework for their evaluation. This paper presents a mathematical framework for quantifying such fluxes in the context of mammalian herbivores. We develop an expression for lateral diffusion of a nutrient, where the diffusivity is a biologically determined parameter depending on the characteristics of mammals occupying the domain, including size-dependent phenomena such as day range, metabolic demand, food passage time, and population size. Three findings stand out: (a) Scaling law-derived estimates of diffusion parameters are comparable to estimates calculated from estimates of each coefficient gathered from primary literature. (b) The diffusion term due to transport of nutrients in dung is orders of magnitude large than the coefficient representing nutrients in bodymass. (c) The scaling coefficients show that large herbivores make a disproportionate contribution to lateral nutrient transfer. We apply the diffusion equation to a case study of Kruger National Park to estimate the conditions under which mammal-driven nutrient transport is comparable in magnitude to other (abiotic) nutrient fluxes (inputs and losses). Finally, a global analysis of mammalian herbivore transport is presented, using a comprehensive database of contemporary animal distributions. We show that continents vary greatly in terms of the importance of animal-driven nutrient fluxes, and also that perturbations to nutrient cycles are potentially quite large if threatened large herbivores are driven to extinction. PMID:23951141

  11. Novel mutation in VCP gene causes atypical amyotrophic lateral sclerosis

    PubMed Central

    González-Pérez, Paloma; Cirulli, Elizabeth T.; Drory, Vivian E.; Dabby, Ron; Nisipeanu, Puiu; Carasso, Ralph L.; Sadeh, Menachem; Fox, Andrew; Festoff, Barry W.; Sapp, Peter C.; McKenna-Yasek, Diane; Goldstein, David B.

    2012-01-01

    Objective: To identify the genetic variant that causes autosomal dominantly inherited motor neuron disease in a 4-generation Israeli-Arab family using genetic linkage and whole exome sequencing. Methods: Genetic linkage analysis was performed in this family using Illumina single nucleotide polymorphism chips. Whole exome sequencing was then undertaken on DNA samples from 2 affected family members using an Illumina 2000 HiSeq platform in pursuit of potentially pathogenic genetic variants that comigrate with the disease in this pedigree. Variants meeting these criteria were then screened in all affected individuals. Results: A novel mutation (p.R191G) in the valosin-containing protein (VCP) gene was identified in the index family. Direct sequencing of the VCP gene in a panel of DNA from 274 unrelated individuals with familial amyotrophic lateral sclerosis (FALS) revealed 5 additional mutations. Among them, 2 were previously identified in pedigrees with a constellation of inclusion body myopathy with Paget disease of the bone and frontotemporal dementia (IBMPFD) and in FALS, and 2 other mutations (p.R159C and p.R155C) in IBMPFD alone. We did not detect VCP gene mutations in DNA from 178 cases of sporadic amyotrophic lateral sclerosis. Conclusions: We report a novel VCP mutation identified in an amyotrophic lateral sclerosis family (p.R191G) with atypical clinical features. In our experience, VCP mutations arise in approximately 1.5% of FALS cases. Our study supports the view that motor neuron disease is part of the clinical spectrum of VCP-associated disease. PMID:23152587

  12. Sécurité de la plus récente classe d’antagonistes des opioïdes durant la grossesse

    PubMed Central

    Poon, Shirley; Pupco, Anna; Koren, Gideon; Bozzo, Pina

    2014-01-01

    Résumé Question J’ai une patiente dont 6 semaines de grossesse viennent d’être confirmées. Depuis 6 mois, elle suit une thérapie pour une dépendance aux opioïdes à l’aide d’une combinaison de buprénorphine et de naloxone. Devrais-je m’inquiéter qu’elle ait été exposée à cette combinaison de médicaments jusqu’à ce stade de sa grossesse? Faudrait-il que je change sa médication pour de la méthadone maintenant qu’elle est enceinte? Réponse Les données limitées sur l’exposition à la buprénorphine durant la grossesse ne révèlent pas d’augmentation du risque de résultats indésirables chez le nouveau-né. Il y a peu de données sur la naloxone durant la grossesse; par ailleurs, on ne s’attendrait pas à ce que l’administration par voie orale soit associée avec un risque accru de résultats de grossesse défavorables. On conseille aux médecins qui traitent des femmes enceintes ou qui deviennent enceintes et dont l’état est stable en prenant une thérapie à la buprénorphine et naloxone de continuer ce traitement mais d’envisager une transition à une monothérapie à la buprénorphine.

  13. L’inhalation de corticostéroïdes est-elle sécuritaire durant la grossesse?

    PubMed Central

    Smy, Laura; Chan, Alvin C.H.; Bozzo, Pina; Koren, Gideon

    2014-01-01

    Résumé Question Une femme atteinte d’asthme léger à modéré, autrement en santé, s’est présentée à ma clinique aujourd’hui après avoir appris qu’elle était enceinte. Elle m’a demandé si elle devait continuer à prendre ses corticostéroïdes en inhalation (CSI) et, dans l’affirmative, s’il pourrait y avoir des risques pour son enfant à naître. Quels seraient vos conseils à ce propos? Réponse Compte tenu des données probantes publiées, les CSI devraient être continués durant toute la grossesse à des doses allant de faibles à modérées et suffisantes pour contrôler les symptômes de l’asthme et prévenir les exacerbations. Il faut toutefois être prudent quand il s’agit de doses de plus de 1 000 µg/j (d’équivalent de béclométasone avec chlorofluorocarbures), quoiqu’il soit actuellement questionnable si de telles doses causeraient des effets indésirables. Il faut renseigner de manière continue les patientes sur l’administration appropriée des CSI et l’observance du traitement, y compris durant le premier trimestre. Un bon contrôle de l’asthme réduira la nécessité de doses plus fortes de CSI et de l’exposition possible à des corticostéroïdes systémiques et diminuera ainsi le risque de résultats périnatals ou de grossesse indésirables.

  14. The influence of smear layer in lateral channels filling

    Microsoft Academic Search

    Angelica Bertacci; Chiara Baroni; Lorenzo Breschi; Mauro Venturi; Carlo Prati

    2007-01-01

    This in vitro study evaluated the ability of a warm gutta-percha obturation system Thermafil to fill lateral channels in presence\\/absence\\u000a of smear layer. Forty single-rooted extracted human teeth were randomly divided into two groups for which different irrigation\\u000a regimens were used: group A, 5 ml of 5% NaOCl + 2.5 ml of 3.6% H2O2; group B, 5 ml of 5% NaOCl 5% +

  15. Friction of ice measured using lateral force microscopy

    SciTech Connect

    Bluhm, Hendrik [Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)] [Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States); Inoue, Takahito [Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)] [Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States); Salmeron, Miquel [Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)] [Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)

    2000-03-15

    The friction of nanometer thin ice films grown on mica substrates is investigated using atomic force microscopy (AFM). Friction was found to be of similar magnitude as the static friction of ice reported in macroscopic experiments. The possible existence of a lubricating film of water due to pressure melting, frictional heating, and surface premelting is discussed based on the experimental results using noncontact, contact, and lateral force microscopy. We conclude that AFM measures the dry friction of ice due to the low scan speed and the squeezing out of the water layer between the sharp AFM tip and the ice surface. (c) 2000 The American Physical Society.

  16. Lateral Casimir Force beyond the Proximity-Force Approximation

    SciTech Connect

    Rodrigues, Robson B.; Neto, Paulo A. Maia [Instituto de Fisica, UFRJ, CP 68528, Rio de Janeiro, RJ, 21941-972 (Brazil); Lambrecht, Astrid; Reynaud, Serge [Laboratoire Kastler Brossel, CNRS, ENS, Universite Pierre et Marie Curie case 74, Campus Jussieu, F-75252 Paris Cedex 05 (France)

    2006-03-17

    We argue that the appropriate variable to study a nontrivial geometry dependence of the Casimir force is the lateral component of the Casimir force, which we evaluate between two corrugated metallic plates outside the validity of the proximity-force approximation. The metallic plates are described by the plasma model, with arbitrary values for the plasma wavelength, the plate separation, and the corrugation period, the corrugation amplitude remaining the smallest length scale. Our analysis shows that in realistic experimental situations the proximity-force approximation overestimates the force by up to 30%.

  17. Continued ultraviolet studies of some Be stars of later type

    NASA Technical Reports Server (NTRS)

    Slettebak, A.

    1985-01-01

    Anomalous ionization (C IV and Si IV) is seen in IUE spectra of Be stars as late as B8, and occurs also in standard stars of similar spectral type. Asymmetrical lines suggesting mass loss are present in all the Be stars and several of the standard stars as well, with no obvious correlation with v sin i. Emission shoulders are present in the Mg II lines of two B5e stars but not in Be stars of later type. Again there is no correlation with v sin i. The A-F shell stars show rich Fe II absorption spectra in the ultraviolet, in one case with velocity structure.

  18. [Role of the lateral pterygoid muscle in mandibular movements].

    PubMed

    Duday, H; Lapeyre, L

    1982-08-01

    The two bundles, superior and inferior, of the lateral pterygoid muscle were studied by EMG and integrated EMG during various movements of the mandible in 36 children and 2 adults. At the same time, the EMG of other masticatory muscles was also recorded. The functional specialization of the two bundles is expressed by different levels of recruitment: In the inferior bundle (pterygo-condylian,) electrical activity is stronger in the movements of opening, antepulsion and controlaterality. In the superior bundle (spheno-meniscal), activity is stronger in the movements of occlusion and retraction. Thus the inferior bundle principally has a function of stabilization of the temporomandibular joint. PMID:7134582

  19. A strip method for lateral drift force of a semisubmersible

    SciTech Connect

    Kim, C.H.; Bao, W.

    1985-09-01

    This paper presents the results of an application of a strip technique for the prediction of the lateral drift forces on a semisubmersible platform floating in oblique regular waves. The method employs Maruo's formula and source distribution technique, without taking account of the hydrodynamic interaction between the twin hulls and columns of the semisubmersible. Overall the strip technique shows a more favorable correlation with the experimental data than the three-dimensional theory. It is, however, premature to conclude that the technique has been fully validated.

  20. Lateral epitaxial growth of germanium on silicon oxide

    SciTech Connect

    Cammilleri, V. D.; Yam, V.; Fossard, F.; Renard, C.; Bouchier, D. [Institut d'Electronique Fondamentale, CNRS UMR 8622, Universite Paris-Sud, Bat 220, 91405 Orsay (France); Fazzini, P. F.; Houdellier, F.; Hyetch, M. [CEMES-CNRS, University of Toulouse, 29, Rue Jeanne Marvig, 31055, Toulouse Cedex 4 (France); Ortolani, L. [CEMES-CNRS, University of Toulouse, 29, Rue Jeanne Marvig, 31055, Toulouse Cedex 4 (France); University of Bologna, Department of Physics, v.le B. Pichat, 6/2, 40127 Bologna (Italy) and CNR-IMM Bologna, v. Gobetti, 101, 40129 Bologna (Italy)

    2008-07-28

    We have developed a method using local oxidation on silicon to create nanoscale silicon seeds for the lateral epitaxial overgrowth of germanium on silicon oxide. The germanium growth starts selectively from silicon seed lines, proceeds by wetting the SiO{sub 2} layer and coalesces without formation of grain boundary. Analysis by high resolution transmission electron microscopy have shown that Ge layers grown above silicon oxide are perfectly monocrystalline and are free of defect. The only detected defects are situated at the Ge/Si interface. Geometrical phase analyses of the microscopy images have shown that the Ge layer is fully relaxed and homogeneous.