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Sample records for presumed pdf shape

  1. What is presumed when we presume consent?

    Directory of Open Access Journals (Sweden)

    Pierscionek Barbara K

    2008-04-01

    Full Text Available Abstract Background The organ donor shortfall in the UK has prompted calls to introduce legislation to allow for presumed consent: if there is no explicit objection to donation of an organ, consent should be presumed. The current debate has not taken in account accepted meanings of presumption in law and science and the consequences for rights of ownership that would arise should presumed consent become law. In addition, arguments revolve around the rights of the competent autonomous adult but do not always consider the more serious implications for children or the disabled. Discussion Any action or decision made on a presumption is accepted in law and science as one based on judgement of a provisional situation. It should therefore allow the possibility of reversing the action or decision. Presumed consent to organ donation will not permit such reversal. Placing prime importance on the functionality of body organs and their capacity to sustain life rather than on explicit consent of the individual will lead to further debate about rights of ownership and potentially to questions about financial incentives and to whom benefits should accrue. Factors that influence donor rates are not fully understood and attitudes of the public to presumed consent require further investigation. Presuming consent will also necessitate considering how such a measure would be applied in situations involving children and mentally incompetent adults. Summary The presumption of consent to organ donation cannot be understood in the same way as is presumption when applied to science or law. Consideration should be given to the consequences of presuming consent and to the questions of ownership and organ monetary value as these questions are likely to arise should presumed consent be permitted. In addition, the implications of presumed consent on children and adults who are unable to object to organ donation, requires serious contemplation if these most vulnerable

  2. Conjunctivitis presumably due to Acanthamoeba

    OpenAIRE

    Ruthes, Ana Cristina de Carvalho; Wahab, Sâmia; Wahab, Najua; Moreira, Hamilton; Moreira, Luciane

    2004-01-01

    OBJETIVO: Abordar quatro casos de conjuntivite presumível por Acanthamoeba, descrevendo o diagnóstico, considerando sinais e sintomas e o tratamento instituído. MÉTODOS: Foram estudados casos de conjuntivite presumível por Acanthamoeba diagnosticados no Hospital de Olhos do Paraná (HOP), no período de setembro/1998 a janeiro/2002. Todos os olhos estudados foram submetidos a um protocolo de investigação que incluía exame oftalmológico completo, microbiologia e cultura de secreções conjuntivais...

  3. Complications of presumed ocular tuberculosis.

    Science.gov (United States)

    Hamade, Issam H; Tabbara, Khalid F

    2010-12-01

    To determine the effect of steroid treatment on visual outcome and ocular complications in patients with presumed ocular tuberculosis. Retrospective review of patients with presumptive ocular tuberculosis. The clinical diagnosis was made based on ocular findings, positive purified protein derivative (PPD) testing of more than 15 mm induration, exclusion of other causes of uveitis and positive ocular response to anti-tuberculous therapy (ATT) within 4 weeks. Group 1 included patients who had received oral prednisone or subtenon injection of triamcinolone acetonide prior to ATT. Group 2 included patients who did not receive corticosteroid therapy prior to administration of ATT.   Among 500 consecutive new cases of uveitis encountered in 1997-2007 there were 49 (10%) patients with presumed ocular tuberculosis. These comprised 28 (57%) male and 21 (43%) female patients with a mean age of 45 years (range 12-76 years). Four (20%) patients in group 1 had initial visual acuity of 20/40 or better, in comparison to eight (28%) patients in group 2. At 1-year follow-up, six (30%) patients in group 1 had a visual acuity of 20/40 or better compared with 20 (69%) patients in group 2 (p = 0.007). Of 20 eyes (26%) in group 1 that had visual acuity of < 20/50 at 1-year follow up, 14 (70%) eyes developed severe chorioretinal lesion (p = 0.019). Early administration of corticosteroids without anti-tuberculous therapy in presumed ocular tuberculosis may lead to poor visual outcome compared with patients who did not receive corticosteroids prior to presentation. Furthermore, the severity of chorioretinitis lesion in the group of patients given corticosteroid prior to ATT may account for the poor visual outcome. © 2009 The Authors. Journal compilation © 2009 Acta Ophthalmol.

  4. PDF Explained

    CERN Document Server

    Whitington, John

    2011-01-01

    An introduction to the PDF file format, threaded through with practical examples - deconstructing, creating and processing PDF files. After exploring how PDF is produced, and how it can be edited with tools from text editors to Ghostscript to PDFTK, readers will learn to deal with problems with PDF files and common error messages.

  5. Conjuntivite presumível por Acanthamoeba

    OpenAIRE

    Ruthes,Ana Cristina de Carvalho; Wahab,Sâmia; Wahab,Najua; Moreira,Hamilton; Moreira,Luciane

    2004-01-01

    OBJETIVO: Abordar quatro casos de conjuntivite presumível por Acanthamoeba, descrevendo o diagnóstico, considerando sinais e sintomas e o tratamento instituído. MÉTODOS: Foram estudados casos de conjuntivite presumível por Acanthamoeba diagnosticados no Hospital de Olhos do Paraná (HOP), no período de setembro/1998 a janeiro/2002. Todos os olhos estudados foram submetidos a um protocolo de investigação que incluía exame oftalmológico completo, microbiologia e cultura de secreções conjuntivais...

  6. Presumed hereditary retinal degenerations: Ibadan experience ...

    African Journals Online (AJOL)

    This study describes the clinical presentation of RP, the prevalence of associated treatable disorders and the characteristics of patients with severe visual impairment and blindness. Method: A retrospective review of 52 cases presumed and diagnosed to have RP was performed on patients who presented at the Eye Clinic, ...

  7. Presumed oculoglandular syndrome from Bartonella quintana.

    Science.gov (United States)

    Borboli, Sheila; Afshari, Natalie A; Watkins, Lynnette; Foster, C Stephen

    2007-01-01

    To describe a case of clinically diagnosed oculoglandular syndrome in a 17-year-old patient that was presumed to be due to Bartonella quintana, as suggested by a positive serologic titer. The patient presented to the Massachusetts Eye and Ear Infirmary emergency room with signs and symptoms suggestive of oculoglandular syndrome. He had a follicular conjunctivitis with a conjunctival granuloma of the right eye and an ipsilateral large, tender submandibular lymph node. He had recently acquired a kitten and a clinical diagnosis of cat-scratch disease was made. A laboratory workup was initiated to determine the cause of this clinical presentation and empirical treatment with antibiotics was started. All laboratory results were negative or normal except for the IgM titer to Bartonella quintana, which was elevated. The patient responded well to treatment and his symptoms resolved within a few weeks. Bartonella quintana infection, a pathogen prevalent in HIV-infected, homeless, or alcoholic patients, is a possible etiologic agent of cat-scratch disease and the associated condition of oculoglandular syndrome.

  8. Fulltext PDF

    Indian Academy of Sciences (India)

    Admin

    and J Laurie Snell, Random Walks and Electric Networks, Mathematical Association of America, Oberlin, OH,. 1984. The book is available on the web as a pdf file at: http://math.dartmouth.edu/~doyle docs/walks/walks.pdf. [3] This interesting topic does not seem to have been explored extensively. A good discussion is ...

  9. Conjuntivite presumível por Acanthamoeba Conjunctivitis presumably due to Acanthamoeba

    Directory of Open Access Journals (Sweden)

    Ana Cristina de Carvalho Ruthes

    2004-12-01

    Full Text Available OBJETIVO: Abordar quatro casos de conjuntivite presumível por Acanthamoeba, descrevendo o diagnóstico, considerando sinais e sintomas e o tratamento instituído. MÉTODOS: Foram estudados casos de conjuntivite presumível por Acanthamoeba diagnosticados no Hospital de Olhos do Paraná (HOP, no período de setembro/1998 a janeiro/2002. Todos os olhos estudados foram submetidos a um protocolo de investigação que incluía exame oftalmológico completo, microbiologia e cultura de secreções conjuntivais. RESULTADOS: Os exames laboratoriais de microscopia e cultura do material colhido estes pacientes revelaram o diagnóstico de Acanthamoeba. A maioria dos pacientes referia olhos vermelhos e irritação ocular de longa data. Os autores encontraram correlação entre a cultura e o exame direto, em que se evidenciou a presença de cistos e trofozoítas do protozoário. CONCLUSÃO: Este é o primeiro relato de conjuntivite provavelmente por Acanthamoeba de acordo com a literatura revisada. Pacientes selecionados e refratários ao tratamento habitual de infecção ocular externa devem ser considerados para estudo laboratorial adequado à procura etiológica da doença.PURPOSE: To describe four cases of conjunctivitis presumably due to Acanthamoeba considering diagnosis, signs, symptoms and treatment. METHODS: We reviewed the medical records of all patients who presented a clinical diagnosis of Acanthamoeba conjunctivitis between September/1998 to January/2001 at the "Hospital de Olhos do Paraná (HOP". All eyes were submitted to a protocol of investigation that included ophthalmologic examination, microscopic examination and culture exams of conjunctival smears for adequate treatment. RESULTS: The laboratorial results of conjunctival smears revealed contamination with Acanthamoeba by direct examination and thereafter, confirmed by culture. The authors observed cysts and trophozoites of Acanthamoeba. CONCLUSION: This is the first report of

  10. Fulltext PDF

    Indian Academy of Sciences (India)

    sriranga

    ? Of course not. Natural selection eliminates birds which make bad choices and we are presumably left with those which make correct choices. So quantitative research in evolu- tionary ecology involves probability calculations to predict which.

  11. Fulltext PDF

    Indian Academy of Sciences (India)

    in/jgenet/OnlineResources/91/e18.pdf. Zaganini R. L., Hashimoto D. T., Pereira L. H. G., Oliveira C., Mendonça F. F., Foresti F. and Porto-Foresti F. 2012 Isolation and characterization of microsatellite loci in the Neotropical fish Astyanax ...

  12. Fulltext PDF

    Indian Academy of Sciences (India)

    Scholars and Post-Doctoral Fellows (PDF), who work in topology and related areas also to apply. The course consists lectures on the following topics: (a) topology of metric spaces, (b) basic proper- ties of topological spaces, (c) separation axioms and metrization theorems, (d) fundamental groups,. (e) covering spaces and ...

  13. Fulltext PDF

    Indian Academy of Sciences (India)

    Tamarind (Tamarindus indica), Acacia karroo and Mimosa asperata are 'alert' and sensitive to external stimuli and subtle changes in incident light. They owe this capacity, termed the. Turgor effect, to the presence of a few secondary metabolites classified as the turgorins. These compounds are presumably produced from ...

  14. Fulltext PDF

    Indian Academy of Sciences (India)

    Because we implicitly assume that the phenomenon of falling has nothing to do with air, they are totally unrelated. In this way science tacitly divides reality into myriads of compartments, presumably unrelated, and then strives to study them separately. Experimentation is a. Experimentation is a way to concentrate on the.

  15. Fulltext PDF

    Indian Academy of Sciences (India)

    Peierls's first connection with India was established in 1934. In the January 6 issue of that year,. Nature carried an advertisement from the Indian Institute of Science seeking applications from competent scientists to fill in an Assistant Professor's position presumably in theoretical physics. Rudolf Peierls, then in a temporary ...

  16. Fulltext PDF

    Indian Academy of Sciences (India)

    Most of us first become familiar with Newton when during our early years we are told the tale of the falling apple: sitting under presumably an apple tree, the young Newton, looked at a falling apple and pondered why apple falls 'down' only. Thus came the revelation and Newton discovered gravity. We are also told another ...

  17. Fulltext PDF

    Indian Academy of Sciences (India)

    2012-12-16

    Dec 16, 2012 ... dition in rodents, presumably resulting in disturbance in normal brain development. The exposure to stress during neurodevelopment has an impact on both physical and men- tal health (Fumagalli et al. 2007; Gluckman et al. 2008). Both human and animal studies suggest that early-life stress has profound ...

  18. Fulltext PDF

    Indian Academy of Sciences (India)

    Sandeep M., Sun F., Liu F., Li J., David P. B. and Yue G. H. 2012 Novel polymorphic microsatellites from Florida red tilapia and cross- species amplification in Mozambique and Nile tilapia. J. Genet. 91, e97–e99. Online only: http://www.ias.ac.in/jgenet/OnlineResources/. 91/e97.pdf. Xin C., Yu D., Peng J., Hu H., Xing Y. and ...

  19. Fulltext PDF

    Indian Academy of Sciences (India)

    Unknown

    When I first met Stephen Jay Gould in Cambridge on a December day in 1969, I encountered an energetic, young, highly articulate professor fascinated by shell shape in land snails. By that year,. Gould had published almost ten papers whose major themes were adaptation, the relationship between shape and size, and the ...

  20. Leptospirosis in a dog with uveitis and presumed cholecystitis.

    Science.gov (United States)

    Gallagher, Alexander

    2011-01-01

    A 7 yr old castrated male Australian shepherd dog was examined for acute change in iris color, lethargy, and anorexia. Uveitis, acute renal failure, and presumed cholecystitis were diagnosed. Based on clinical findings, leptosporosis was suspected, and the dog was treated with antibiotics and supportive care. The dog made a complete recovery, and leptospirosis was confirmed on convalescent titers. Due to the zoonotic potential, leptospirosis should be considered in cases of uveitis, as well as possible cholecystitis.

  1. Presumed Group B Streptococcal Meningitis After Epidural Blood Patch.

    Science.gov (United States)

    Beilin, Yaakov; Spitzer, Yelena

    2015-06-15

    Bacterial meningitis after epidural catheter placement is rare. We describe a case in which a parturient received labor epidural analgesia for vaginal delivery complicated by dural puncture. The patient developed postdural puncture headache and underwent 2 separate epidural blood patch procedures. She subsequently developed a headache with fever and focal neurologic deficits. She was treated with broad spectrum antibiotics for presumed meningitis, and she made a full recovery. Blood cultures subsequently grew group B streptococcus.

  2. Fulltext PDF

    Indian Academy of Sciences (India)

    The linear feedback is designed with a linear quadratic regulator (LQR) which ensures stabilization as well as desired ... interpolation functions. 2.1 Finite element method. Using finite element ... The displacement yj can be represented in terms of shape functions φk(x) and nodal displacements u(t) as yj (xj ,t) = 4. ∑ k=1.

  3. Fulltext PDF

    Indian Academy of Sciences (India)

    VSEPR and its applications are available from any standard inorganic chemistry textbook. (see [1] and [2]). According to the VSEPR theory, the shape of a molecule is determined by the electron-pair repulsions around the atoms present. The ba- sic premise is that the electron pairs sur- rounding a given atom will tend to ...

  4. Fulltext PDF

    Indian Academy of Sciences (India)

    "system of the world" based on his law of universal gravitation. From the latter he inherited the three fundamental laws of planetary motion, known after Kepler's name. These laws concern respectively the elliptical shape of each planetary orbit; the constancy of the areal velocity; and the connection between time period and ...

  5. Fulltext PDF

    Indian Academy of Sciences (India)

    Nature has arranged crystal shapes so that their groups of symmetries also preserve three dimensional ... The finite group representation theory comes into the study of selection rules for a molecule vibrating in an ... the index is woefully inadequate for a book of such encyclopaedic reach. In fact, since Sternberg eschews ...

  6. Fulltext PDF

    Indian Academy of Sciences (India)

    various backgrounds excluding the QCD process and (b) additionally includes the QCD background. The shape of the QCD background can be evaluated by relaxing selection cuts and then normalizing it to the expected number of events for final selection. The total number of events passing through all selection criteria ...

  7. Fulltext PDF

    Indian Academy of Sciences (India)

    Box 2. Platonic Solids And The Music Of The Sphere. The Pythagoreans and later Plato believed that the five regular polyhedra play a crucial role in nature. The 'atoms' of the four elements – fire, earth, air and water – were supposed to be in the shapes of a tetrahedron, cube, octahedron and icosahedron, respectively.

  8. Fulltext PDF

    Indian Academy of Sciences (India)

    real entities. The IUPAC periodic table, artificial elements, supramolecules, modern catalysts, superconductors, nanoparticles, shapes of proteins and nucleic acids, photosynthesis, greenhouse effect, ozone layer, acid rain, smog, batteries, coal, biogas plants, photovoltaic cells, gas hydrates on ocean floor - items like these ...

  9. Fulltext PDF

    Indian Academy of Sciences (India)

    user

    Tender shoots and the under surface of leaves are covered with dense brown velvety hairs. Flowers are borne on stiff bunches terminally on short shoots. They are 2-3 cm across, white, sweet-scented with light-brown hairy sepals and many stamens. Loquat fruits are round or pear-shaped, 3-5 cm long and are edible.

  10. Fulltext PDF

    Indian Academy of Sciences (India)

    Thus, now there is a huge collection of odd shaped rocky chunks of various sizes orbiting around the Sun, like the planets. If they come close enough to a planet they could be grabbed by the latter's gravita- tional pull and become its moon. It is believed that one of the moons of Mars was once a planetoid that got trapped ...

  11. Fulltext PDF

    Indian Academy of Sciences (India)

    0.1 or if it is subjected to incident waves with predominant dimensionless periods of greater than. 13 times the shape ratio. In incidence of .... to the simple and less critical case of incident SH waves or were restricted to some ...... Advances in Boundary Element Techniques IV (eds) Gal- lego R and Aliabadi M H, 231–236.

  12. Fulltext PDF

    Indian Academy of Sciences (India)

    0008471

    pyridyl moieties, new examples of cluster MOFs containing cationic and neutral copper(I) iodide clusters were prepared. The MOF 2 contains a Rugby ball shaped, edge-fused polymeric {[Cu6I4]2+}n clusters, whereas the MOF 3 contains a ...

  13. Fulltext PDF

    Indian Academy of Sciences (India)

    Box 2. Isoperimetric Inequalities. If a simple closed curve of length L encloses an area A, then the classical isoperimetric inequality. L2 ~ 411"A. (with equality only for the disc) solves a problem known from the time of the. Greeks as Dido's problem: Given a fixed perimeter L, what is the shape of the domain which has ...

  14. Fulltext PDF

    Indian Academy of Sciences (India)

    lessly learns a lot of geometry relevant to the shapes of the bubbles. Now about the Indian edition of this marvel- lous book. I could not lay my hands on the first edition of this monograph. However, I have. Complex Function Theory. A Concise and Interesting Book! Gadadhar Misra. Notes on Complex Function Theory.

  15. Fulltext PDF

    Indian Academy of Sciences (India)

    System5

    2017-07-05

    Jul 5, 2017 ... light brown. Leaves are opposite, elliptic-ovate, thick and leathery. Flowers are white, in dense axillary clusters, 5mmin diameter. Calyx is cup-shaped and lightgreen. Petals free. Stamens are many; anthers with lightbluetinge. Stigma simple, longerthan the flower. Fruitaberry, blackwhenripe. Flowers ...

  16. Fulltext PDF

    Indian Academy of Sciences (India)

    IAS Admin

    (4) 'Homological algebra' grew out of the study of algebraic invariants associated with shape and the study of certain proper- ties of groups. In the seminal work on this topic by Cartan and. Eilenberg, it was shown that what was needed was a vast system- atic generalization of the rank-nullity1 theorem of linear algebra.

  17. Fulltext PDF

    Indian Academy of Sciences (India)

    Broussonetia papyrifera L 'Her., the paper. Mulberry of Moraceae is a large deciduous tree with milky latex and greyish hairy twigs. The shape of the crown and the general pattern of growth of this species vary according to the space available. Leaves are either entire or deeply lobed. Flowers are small and borne on two ...

  18. Fulltext PDF

    Indian Academy of Sciences (India)

    ... handsome tree with a straight bole that branches at the top. Leaves are once pinnate, with two to three pairs of leaflets. Young parts of the tree are velvety. Inflorescence is a branched raceme borne at the branch ends. Flowers are large, white, attractive, and fragrant. Corolla is funnel-shaped. Fruit is an elongate capsule.

  19. Fulltext PDF

    Indian Academy of Sciences (India)

    Unknown

    tile's size, density, launch angle, and launch speed – range, maximum height, impact angle, and impact speed. Looking at the computation point by point gives the shape of the trajectory. With only a little playing around one can work back from an observed range to a launch speed. Of course, the scheme assumes spherical ...

  20. Fulltext PDF

    Indian Academy of Sciences (India)

    only as thick as a pencil, and hair-like leaves which are only 3 mm .... Because of its lightweight, bamboo is also used in artificial ... tion of the leaves. Because of the availability of wide range of sizes, shapes and growth habits, bamboos can be grown as groves. (larger ones), individual plants, in the courtyard, or as hedges,.

  1. Fulltext PDF

    Indian Academy of Sciences (India)

    IAS Admin

    (3) 'Topology' is often described as the study of 'shape' or. 'rubber-sheet' geometry. However, within mathematics, there are two subjects – one addressing 'point-set' topology, which is primarily a study of certain systems of subsets of a set (called a topology on that set), and the other dealing with 'algebraic' topology which ...

  2. Fulltext PDF

    Indian Academy of Sciences (India)

    Unknown

    functional group). These tests reveal predictable generalization gradients across these molecular features. These data substantiate the claim that these features are relevant coding dimensions in the fruit fly .... length, shape and functional group (Daly et al 2001). ..... further training we cannot conclusively state at this point.

  3. Fulltext PDF

    Indian Academy of Sciences (India)

    ization is evident from ChIP on chip data extracted from. Flybase/ModEncode. Figure 7f shows for comparison the distribution of BEAF and Chriz on a 300 kb region of distal chromosome 3 L obtained by chromatin immunoprecipita- tion from Drosophila S2 cells (http://www.modencode.org/). Note that although the shapes of ...

  4. Fulltext PDF

    Indian Academy of Sciences (India)

    2012-11-11

    Nov 11, 2012 ... backgrounds without ad hoc corrections. The way we have chosen to determine further ... Using 1.07 fb. −1. RunIIa dataset, Vista finds 117 exclusive final states with 5543 kinematic shape distributions. Two final states are found to have more than 3σ discrepancy. These are the final states μ + 2 jets + /ET, ...

  5. Fulltext PDF

    Indian Academy of Sciences (India)

    IAS Admin

    What type of intuition started the trajectory that eventually becomes what we celebrate today?'” Like much of Eliasson's work, the sculpture explores the common ground between art and science. It is molded into the shape of a toroid, recalling natural forms found from black holes and galaxies to seashells and coils of. DNA.

  6. Fulltext PDF

    Indian Academy of Sciences (India)

    For each sample, 15 images have been col- lected in different areas of the sample. The Image Processing and Data Analysis software of the quoted AFM was used for the rms surface roughness analysis and surface area measurements, as defined elsewhere [5]. Microfabricated V-shaped sil- icon cantilever with silicon ...

  7. Fulltext PDF

    Indian Academy of Sciences (India)

    Proton and α-spectra; heavy-ion reaction; broad structures; nuclear level ... the fusion reaction. The effects of angular momentum and temperature-dependent shape evolution and fluctuations on the particle spectra have been addressed in ... impurities were subtracted by measuring with suitable carbon and oxygen targets.

  8. Fulltext PDF

    Indian Academy of Sciences (India)

    Prakash

    reasons, it is not surprising that plants manifest “plastic” phenotypes, both as ... these plastic phenotypic responses is mechanical perturbation (MP), which can evoke dramatic differences in the size, shape, or mechanical properties of ... among woody species is the preferential deposition of wood within individual growth ...

  9. Fulltext PDF

    Indian Academy of Sciences (India)

    To visit the entire maze some brave souls in storybooks equip themselves with lots of stone pieces, and go on marking their route with them, so that they can retrace their steps. Now assume that you have a huge supply of stones with you when you enter the maze. The stones have no particular shape, and hence cannot be.

  10. Fulltext PDF

    Indian Academy of Sciences (India)

    user

    ight conditions are of prim ary concern in aeronautics. T hese are best understood by ¯rst studying the forces/m o- m ents on sim ple body shapes w hich go tow ards constituting the airplane con¯guration. In this article, w e study the ...

  11. Fulltext PDF

    Indian Academy of Sciences (India)

    1Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India. 2Institute of Physics ... Pulse shape discrimination; solid-state surface barrier detector; heavy ion- induced fission reaction studies ... It is difficult to separate fission fragments and elastically scattered particles produced in a nuclear reaction.

  12. Fulltext PDF

    Indian Academy of Sciences (India)

    This report describes the making of a self-assembled coordination architecture that is named as a 'molecular star' since it resembles the shape of a star; more specifically a five-pointed star. This work has been already published in Chemistry- A European Jour- nal in the September 2017 issue and was featured in the cover.

  13. Fulltext PDF

    Indian Academy of Sciences (India)

    grades of concrete and steel bars), choosing shape and size of the cross-section, and calculating amount and distribution of steel reinforcement. The first two aspects are part of the overall design strategy of the whole building. The Indian Ductile Detailing. Code IS:13920-1993 requires columns to be at least 300mm wide.

  14. Fulltext PDF

    Indian Academy of Sciences (India)

    Admin

    tree with whitish outer bark. Branchlets are covered with soft white hair. Leaves are simple, broadly orbicular, long-petioled with the margin showing a toothed outline. Flowers are unisexual, male and female flowers being produced on different plants. Corolla of the flower is cup- or bell-shaped and creamish. Stamens are ...

  15. Fulltext PDF

    Indian Academy of Sciences (India)

    tube keeping the open end of the pipe in a vertical position. A white backdrop was placed behind the aquarium for contrast. In. Figure 1b, we show an air bubble .... a coating on the surface of the bubble which drains downwards releasing the bubble. The bubble adopts a distorted shape (see. Figure 4) in the heptane layer ...

  16. Fulltext PDF

    Indian Academy of Sciences (India)

    cDNA library between the normal and abortive flower buds and an 801-bp cDNA fragment, RC15 (GenBank accession number JZ349629) appeared to accumulate specifically in the normal flower buds (Yue et al. 2013). The sequence .... affect the shape of petals by controlling the cutin forma- tion in petunia. In Arabidopsis ...

  17. Fulltext PDF

    Indian Academy of Sciences (India)

    68 Fascinating Shapes and Strudures Due to Entropic. Forces. Kheyo Sengupta and Kattero A Suresh. 73 Adaptive Significance of Circadian Rhythms. Biological Clocks andDarwinian Fitness in Cyanobacteria. V Sheeba, Vijoy Kumar Sharma and Amitabh Joshi. BOOK REVIEWS. 76 Ex-Prodigy, My Childhood and Youth.

  18. Fulltext PDF

    Indian Academy of Sciences (India)

    a drum?' That is, thinking of M as a vibrating mem- brane and )...~ as its fundamental tones, is it possible to figure out the shape of the drum by simply listening to the music it produces? In 1964, Milnor showed that the eigenvalues cannot distinguish isometric manifolds. The idea of Minakshisundaram and Pleijel was to look.

  19. Fulltext PDF

    Indian Academy of Sciences (India)

    The propeller, schematically shown in igure 3a consists of a number of radial blades fixed to a shaft turned at a rotational speed 2 by connecting it to a source of mechanical power. (typically an internal combustion engine). Each blade has the shape of a twisted wing with a suitable airfoil cross-section and may be thought of ...

  20. Fulltext PDF

    Indian Academy of Sciences (India)

    Unknown

    food we eat everyday contains negative entropy. Since biological order is destroyed slowly by thermal ... Until that time food was considered to be an energy source for activity and materials to build up our bodies, the .... gated chain of elements folds itself to a correctly folded shape. At each joint of folding there are many ...

  1. Fulltext PDF

    Indian Academy of Sciences (India)

    2014-07-01

    Jul 1, 2014 ... The genomic composition of an organism is shaped by the selective pressures imposed by its niche environment. .... functional unit originally acquired under pressure during evolution'. ... in growth phase-dependent and osmotic regulation of σS and many σS-dependent genes in Escherichia coli.

  2. Fulltext PDF

    Indian Academy of Sciences (India)

    If the thread is pulled outwards at the center, the thread adopts the shape shown in Figure 1. Also see the video: youtube.com/watch?v=nKKS3qQGR8w. Soap films can also be used to compute minimum surfaces to solve three-dimensional problems by constructing frames which. 1214. RESONANCE | December 2017 ...

  3. Fulltext PDF

    Indian Academy of Sciences (India)

    Mosaic texture of the B1 iquid crystalline phase exhibited by compounds made of banana shaped molecules. (Photo courtesy: R Pratibha, RRIl. (Colour scheme for cover by Jayant Roo). Thomas Hunt Morgan. 11866 - 1945). (Illustration: Thangapazham). I. DEPARTMENTS. 01. Editorial. Editor's Column. G Nagendrappa.

  4. Fulltext PDF

    Indian Academy of Sciences (India)

    RESONANCE | August 2007. DEPARTMENTS. Editorial. Vasant Natarajan. A rectangular shaped SmS sample under high pressure inside a DAC. See article on p.49. (Courtesy: A Jayaraman). John Backus. (1924 – 2007). ( Illustration: Subhankar Biswas ). Front Cover. Back Cover. 01. Inside Back Cover. Flowering Trees.

  5. Fulltext PDF

    Indian Academy of Sciences (India)

    R. Narasimhan (Krishtel eMaging) 1461 1996 Oct 15 13:05:22

    rotating elliptical galaxies. ... tori give birth to families of regular orbits with similar shape to that of the parent resonant periodic orbit. ..... transformation for the study of the phase space of the above systems in any resonant case (see Elipe & Deprit ...

  6. Fulltext PDF

    Indian Academy of Sciences (India)

    Unknown

    The idea of putting this issue together took shape during the Third International Conference on Oxygen/Nitrogen Radicals: Cell Injury and Disease, held in Morgantown, West Virginia,. USA from 1–5 June 2002. At this conference several diseases including Alzheimer's, atherosclerosis, arthritis, diabetes, Parkinson's disease ...

  7. Fulltext PDF

    Indian Academy of Sciences (India)

    It is a common experience that the images of the rising or the setting sun through sky-light openings are often quite well defined. These openings could be circular, oval, rectangular or even rhombic in shape. In each of these cases the image of the distant sun is perfectly circular or elliptical depending upon its projection on ...

  8. Fulltext PDF

    Indian Academy of Sciences (India)

    Importance of Architectural Features. The behaviour of a building during earthquakes depends critically on its overall shape, size and geometry, in addition to how the earthquake forces are carried to the ground. Hence, at the planning stage itself, architects and structural engineers must work together to ensure that the ...

  9. Fulltext PDF

    Indian Academy of Sciences (India)

    Flowers in panicles are 1–1.2 cm long and 0.6–0.8 cm across, bell-shaped, both bisexual and unisexual flowers being found on the same tree. Stamens are ten with hairy filaments. Fruits resemble small grapes and are sometimes borne in great profusion becoming very conspicuous when the leaves fall. Some of the leaves ...

  10. Fulltext PDF

    Indian Academy of Sciences (India)

    The human eye is a complex machine which allows us to see the world with unimaginable clarity in three dimensions. The credit goes not only to the eyes but also to the brain – after all, eyes are the outgrowth of brain. When we see things with our eyes, in addition to viewing an object, we are able to perceive its size, shape, ...

  11. Fulltext PDF

    Indian Academy of Sciences (India)

    Both the figures have been drawn for a time slice of 1.5 ms from the initiation of the discharge. In the experiment. (figure 3b), the initial hollow shape is sustained for around 350 pis, then it changes to a parabolic one. In the simulation, the initial jº, profile was considered to be flat and it has been allowed to evolve with time.

  12. Download this PDF file

    African Journals Online (AJOL)

    2007-08-02

    Aug 2, 2007 ... in Ghana, Cameroon and Gabon (Karikari,. 1980). In some areas such as Asia, they are the. 53. Journal of Science and Technology, Volume 27 no. 2, August, 2007. Optimal rice/colocasia cropping systems. Kassim et. al. PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com ...

  13. Presumed consent for organ donation: is Romania prepared for it?

    Science.gov (United States)

    Grigoras, I; Condac, C; Cartes, C; Blaj, M; Florin, G

    2010-01-01

    In November 2007, a legislative initiative regarding the presumed consent for organ donation was proposed for parliamentary debate in Romania and was followed by public debate. The study aimed to asses public opinions expressed in the Romanian media. An Internet search was made. The pro and con reasons, the affiliation of parts involved in the debate and suggested future direction of action were identified. The Internet search had 8572 results. The parts involved in the pro and con debate consisted of governmental structures, physicians, ethicists, politicians, media, religious authorities, nongovernmental associations, and lay persons. The main pros were the low rate of organ donation and the long waiting lists, enhancement of organ procurement, avoidance of wasting valuable organs, avoiding responsibility, and the stress imposed to the family in giving the donation consent, humanitarian purposes (saving lives), going along with the scientific progress, and less bureaucracy. The main cons were an unethical issue, violation of human rights, denial of brain death, unethical advantage of public ignorance, unethical use of underprivileged people, little results in terms of organ procurement, but huge negative effects on public opinion, public mistrust in transplant programs and impossibility of refusal identification due to particularities of the Romanian medical system. The con opinions prevailed. For the moment, Romania seems to be unprepared to accept presumed consent. A future change in public perception regarding organ transplantation may modify the terms of a public debate.

  14. Presuming the influence of the media: teenagers′ constructions of gender identity through sexual/romantic relationships and alcohol consumption

    OpenAIRE

    Hartley, Jane E K; Wight, Daniel; Hunt, Kate

    2014-01-01

    Using empirical data from group discussions and in-depth interviews with 13 to 15-year olds in Scotland, this study explores how teenagers’ alcohol drinking and sexual/romantic relationships were shaped by their quest for appropriate gendered identities. In this, they acknowledged the influence of the media, but primarily in relation to others, not to themselves, thereby supporting Milkie's ‘presumed media influence’ theory. Media portrayals of romantic/sexual relationships appeared to influe...

  15. Presumed symbolic use of diurnal raptors by Neanderthals.

    Directory of Open Access Journals (Sweden)

    Eugène Morin

    Full Text Available In Africa and western Eurasia, occurrences of burials and utilized ocher fragments during the late Middle and early Late Pleistocene are often considered evidence for the emergence of symbolically-mediated behavior. Perhaps less controversial for the study of human cognitive evolution are finds of marine shell beads and complex designs on organic and mineral artifacts in early modern human (EMH assemblages conservatively dated to ≈ 100-60 kilo-years (ka ago. Here we show that, in France, Neanderthals used skeletal parts of large diurnal raptors presumably for symbolic purposes at Combe-Grenal in a layer dated to marine isotope stage (MIS 5b (≈ 90 ka and at Les Fieux in stratigraphic units dated to the early/middle phase of MIS 3 (60-40 ka. The presence of similar objects in other Middle Paleolithic contexts in France and Italy suggest that raptors were used as means of symbolic expression by Neanderthals in these regions.

  16. Reactivation of presumed adenoviral keratitis after laser in situ keratomileusis.

    Science.gov (United States)

    Safak, Nilgün; Bilgihan, Kamil; Gürelik, Gökhan; Ozdek, Sengül; Hasanreisoğlu, Berati

    2002-04-01

    We report a patient with reactivation of presumed adenoviral keratoconjunctivitis after laser in situ keratomileusis (LASIK) to correct high myopia. The preoperative refraction was -13.00 diopters (D) in the right eye and -14.00 D in the left eye, and the best corrected visual acuity was 20/20 in both eyes. On the first postoperative day, mild conjunctival hyperemia and multiple subepithelial infiltrations localized in the flap zone consistent with adenoviral keratoconjunctivitis were seen. After prompt treatment, the lesions resolved. As a consequence, LASIK successfully corrected the high myopia. Adenoviral keratoconjunctivitis can be reactivated after LASIK, unlike after photorefractive keratectomy, despite the absence of symptomatic and clinical findings before the procedure.

  17. Presumed pseudobacteremia outbreak resulting from contamination of proportional disinfectant dispenser.

    Science.gov (United States)

    Siebor, E; Llanes, C; Lafon, I; Ogier-Desserrey, A; Duez, J M; Pechinot, A; Caillot, D; Grandjean, M; Sixt, N; Neuwirth, C

    2007-03-01

    Reported here are the microbiological and epidemiological details of a presumed outbreak of aerobic gram-negative bacilli infections affecting 19 hematological patients, which was traced to contaminated disinfectant. Over a 5-month period, the following organisms were isolated from the blood cultures of 19 neutropenic patients: Pseudomonas fluorescens (n = 13), Achromobacter xylosoxidans (n = 12), Comamonas testosteroni (n = 2) or Stenotrophomonas maltophilia (n = 1). The affected patients were all treated with an expensive regimen of broad-spectrum antibiotic therapy. The same bacteria were recovered from environmental samples as well as from the water pipes of an apparatus for dispensing disinfectant (didecyldimethylammonium chloride). Genotyping results indicated that many of the clinical strains were identical to strains isolated from the apparatus. It was eventually discovered that the night staff was in the habit of disinfecting the blood-culture bottles before use, thereby contaminating the bottles with bacteria contained in the disinfectant. Contamination of the apparatus resulted from faulty maintenance.

  18. The spectrum of presumed tubercular uveitis in Tunisia, North Africa.

    Science.gov (United States)

    Khochtali, Sana; Gargouri, Salma; Abroug, Nesrine; Ksiaa, Imen; Attia, Sonia; Sellami, Dorra; Feki, Jamel; Khairallah, Moncef

    2015-10-01

    The purpose of this study was to analyze the spectrum of presumed tubercular uveitis in Tunisia, North Africa. We retrospectively reviewed the clinical records of 38 patients (65 eyes) diagnosed with presumed tubercular uveitis at two referral centers in Tunisia, between January 2009 and December 2011. Mean age at presentation was 42.7 years. Twenty-four patients were women (63.2%) and 14 (36.8%) were men. Twenty-three eyes (35.4%) had posterior uveitis, 21 eyes (32.3%) had intermediate uveitis, 13 eyes (20%) had panuveitis, and 8 eyes (12.3%) had anterior uveitis. Ocular findings included vitritis in 67.7% of eyes, posterior synechiae in 47.7%, multifocal non-serpiginoid choroiditis in 23.1%, multifocal serpiginoid choroiditis in 21.5%, periphlebitis in 21.5%, and mutton-fat keratic precipitates in 20%. Anti-tubercular treatment was prescribed in 33 patients (86.8%) and was associated with systemic corticosteroids in 20 patients (52.6%) and periocular injections of corticosteroids in four patients (10.5%). After a mean follow-up of 14.2 months (range, 10-58), inflammation was controlled, with a significant improvement in visual acuity (VA) (p = 0.028). However, recurrences developed in two patients (5.3%). Final VA was better than 20/40 in 27 eyes (41.5%) and less than 20/200 in five eyes (7.7%). In Tunisia, all anatomic types are possible in tuberculosis-associated uveitis, but posterior and intermediate uveitis are more frequent. Vitritis, posterior synechiae, multifocal serpiginoid or non-serpiginoid choroiditis, and periphlebitis are the most common manifestations.

  19. Infectious endotheliitis: a rare case of presumed mycotic origin

    Science.gov (United States)

    Zapata, Luis Fernando; Paulo, José David; Restrepo, Carlos A; Velásquez, Luis Fernando; Montoya, Andrés E Toro; Zapata, Melissa A

    2013-01-01

    Purpose To report an interesting case of infectious endotheliitis of presumed mycotic origin. Methods A case report of a 56-year-old male farmer who sought medical attention after a month-long evolution of irritative symptoms in his right eye, accompanied by visual acuity (VA) impairment. The patient received topical and oral broad-spectrum antibiotic treatment with no improvement before being referred to a cornea specialist, where he was found to have VA of 20/150 and was noted on biomicroscopy to have endothelial feathery coalescent lesions. The patient was admitted to the hospital for an aqueous humor sample and intravenous voriconazole. Results The microbiological studies did not isolate any micro-organisms. However, clinical evidence of improvement was confirmed after 5 days of antimycotic intravenous therapy. Complete clinical resolution was achieved at 1 month after treatment completion with oral voriconazole, as evidenced by VA of 20/20 and disappearance of endothelial lesions. Conclusion Endothelial involvement by fungi is a rare condition. In this case, no microbes were isolated, but the characteristic morphology of the lesions, the history of onychomycosis, and the spectacular response to voriconazole turn this case into a valid presumptive diagnosis. PMID:23901253

  20. Outbreak of keratitis presumed to be caused by Acanthamoeba.

    Science.gov (United States)

    Mathers, W D; Sutphin, J E; Folberg, R; Meier, P A; Wenzel, R P; Elgin, R G

    1996-02-01

    A sharp increase of Acanthamoeba keratitis from two cases per year to 30 cases per year at our institution prompted this study to determine whether there was a change in the clinical characteristics, basic epidemiology, and outcome of this disease. We reviewed all cases of Acanthamoeba keratitis diagnosed at the University of Iowa Hospitals and Clinics from mid-1993 through 1994. We screened 217 patients with keratitis by tandem scanning confocal microscopy and suspected Acanthamoeba in 51 patients. Diagnosis was confirmed by cytology in 43 patients (48 eyes). There were no positive cultures. Patients examined within four weeks of onset of symptoms were younger (mean age, 32.6 +/- 15.4 years) and wore contact lenses (11 of 18 patients), and infrequently herpes simplex keratitis (four of 18 patients) was diagnosed. Patients examined after four weeks were older (mean age, 54.0 +/- 19.5 years), infrequently wore contact lenses (six of 25 patients), and often had herpes simplex keratitis (12 of 25 patients). Corneal examination with tandem scanning confocal microscopy was associated with a marked increase in the detection of Acanthamoeba, strongly suggesting that the disease is more prevalent than suspected. Acanthamoeba may account for many cases of clinically presumed herpes simplex keratitis, the leading cause of corneal blindness in the United States. Acanthamoeba should be considered in the differential diagnosis of any unexplained keratitis, even those of short duration.

  1. Infectious endotheliitis: a rare case of presumed mycotic origin

    Directory of Open Access Journals (Sweden)

    Zapata LF

    2013-07-01

    Full Text Available Luis Fernando Zapata,1 José David Paulo,1 Carlos A Restrepo,1 Luis Fernando Velásquez,2 Andrés E Toro Montoya,2 Melissa A Zapata21Department of Ophthalmology Hospital Pablo Tobón Uribe; 2School of Medicine, Universidad Pontificia Bolivariana, Medellín, ColombiaPurpose: To report an interesting case of infectious endotheliitis of presumed mycotic origin.Methods: A case report of a 56-year-old male farmer who sought medical attention after a month-long evolution of irritative symptoms in his right eye, accompanied by visual acuity (VA impairment. The patient received topical and oral broad-spectrum antibiotic treatment with no improvement before being referred to a cornea specialist, where he was found to have VA of 20/150 and was noted on biomicroscopy to have endothelial feathery coalescent lesions. The patient was admitted to the hospital for an aqueous humor sample and intravenous voriconazole.Results: The microbiological studies did not isolate any micro-organisms. However, clinical evidence of improvement was confirmed after 5 days of antimycotic intravenous therapy. Complete clinical resolution was achieved at 1 month after treatment completion with oral voriconazole, as evidenced by VA of 20/20 and disappearance of endothelial lesions.Conclusion: Endothelial involvement by fungi is a rare condition. In this case, no microbes were isolated, but the characteristic morphology of the lesions, the history of onychomycosis, and the spectacular response to voriconazole turn this case into a valid presumptive diagnosis.Keywords: endotheliitis, mycotic, keratitis, voriconazole

  2. Download this PDF file

    African Journals Online (AJOL)

    To highlight the vulnerability of digital resources and strategies for digital preservation. ii. To highlight the role of Institutional. Repositories in digital preservation and access. Threats to Digital assets. Digital assets either digital born or digitized are stored and preserved on storage media. The most. PDF Creator - PDF4Free ...

  3. Listening to the Shape of a Drum

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 3; Issue 10. Listening to the Shape of a Drum - You Cannot Hear the Shape of a Drum! S Kesavan. General Article Volume 3 Issue 10 October 1998 pp 49-58. Fulltext. Click here to view fulltext PDF. Permanent link:

  4. Are PDF Documents Accessible?

    Directory of Open Access Journals (Sweden)

    Mireia Ribera Turró

    2008-09-01

    Full Text Available Adobe PDF is one of the most widely used formats in scientific communications and in administrative documents. In its latest versions it has incorporated structural tags and improvements that increase its level of accessibility. This article reviews the concept of accessibility in the reading of digital documents and evaluates the accessibility of PDF according to the most widely established standards.

  5. Aetiological study of the presumed ocular histoplasmosis syndrome in the Netherlands

    NARCIS (Netherlands)

    Ongkosuwito, J.V.; Kortbeek, L.M.; Lelij, van der A.; Molicka, E.; Kijlstra, A.; Smet, de M.D.; Suttrop-Schulten, M.S.A.

    1999-01-01

    Aim. To investigate whether presumed ocular histoplasmosis syndrome in the Netherlands is caused by Histoplasma capsulatum and whether other risk factors might play a role in the pathogenesis of this syndrome. Methods. 23 patients were clinically diagnosed as having presumed ocular histoplasmosis

  6. Presuming the influence of the media: teenagers′ constructions of gender identity through sexual/romantic relationships and alcohol consumption

    Science.gov (United States)

    Hartley, Jane E K; Wight, Daniel; Hunt, Kate

    2014-01-01

    Using empirical data from group discussions and in-depth interviews with 13 to 15-year olds in Scotland, this study explores how teenagers’ alcohol drinking and sexual/romantic relationships were shaped by their quest for appropriate gendered identities. In this, they acknowledged the influence of the media, but primarily in relation to others, not to themselves, thereby supporting Milkie's ‘presumed media influence’ theory. Media portrayals of romantic/sexual relationships appeared to influence teenagers’ constructions of gender-appropriate sexual behaviour more than did media portrayals of drinking behaviour, perhaps because the teenagers had more firsthand experience of observing drinking than of observing sexual relationships. Presumed media influence may be less influential if one has experience of the behaviour portrayed. Drinking and sexual behaviour were highly interrelated: sexual negotiation and activities were reportedly often accompanied by drinking. For teenagers, being drunk or, importantly, pretending to be drunk, may be a useful way to try out what they perceived to be gender-appropriate identities. In sum, teenagers’ drinking and sexual/romantic relationships are primary ways in which they do gender and the media's influence on their perceptions of appropriate gendered behaviour is mediated through peer relationships. PMID:24443822

  7. Presuming the influence of the media: teenagers' constructions of gender identity through sexual/romantic relationships and alcohol consumption.

    Science.gov (United States)

    Hartley, Jane E K; Wight, Daniel; Hunt, Kate

    2014-06-01

    Using empirical data from group discussions and in-depth interviews with 13 to 15-year olds in Scotland, this study explores how teenagers' alcohol drinking and sexual/romantic relationships were shaped by their quest for appropriate gendered identities. In this, they acknowledged the influence of the media, but primarily in relation to others, not to themselves, thereby supporting Milkie's 'presumed media influence' theory. Media portrayals of romantic/sexual relationships appeared to influence teenagers' constructions of gender-appropriate sexual behaviour more than did media portrayals of drinking behaviour, perhaps because the teenagers had more firsthand experience of observing drinking than of observing sexual relationships. Presumed media influence may be less influential if one has experience of the behaviour portrayed. Drinking and sexual behaviour were highly interrelated: sexual negotiation and activities were reportedly often accompanied by drinking. For teenagers, being drunk or, importantly, pretending to be drunk, may be a useful way to try out what they perceived to be gender-appropriate identities. In sum, teenagers' drinking and sexual/romantic relationships are primary ways in which they do gender and the media's influence on their perceptions of appropriate gendered behaviour is mediated through peer relationships. © 2014 The Authors. Sociology of Health & Illness published by John Wiley & Sons Ltd on behalf of Foundation for SHIL (SHIL).

  8. to view fulltext PDF

    Indian Academy of Sciences (India)

    http://www.ias.ac.in/jgenet/OnlineResources/90/e34.pdf. Morinha F., Carvalho M., Ferro A., Guedes-Pinto H., Rodrigues R. and Bastos E. 2011 Molecular sexing and analysis of CHD1-Z and. CHD1-W sequence variations in wild common quail (Coturnix c. coturnix) and domesticated Japanese quail (Coturnix c. japonica).

  9. Download this PDF file

    African Journals Online (AJOL)

    Mr Olusoji

    IMuki Christopher Vbong,' Ago Boniface Vji.' EfifJk Eyo EjifJk,' Ebaghe God",in Abeng,' Nnorom. Felix,'. 'Deparlment 0fOh,lelrics olUl G)"Iwecology, Vnil"er.,iry ..... Gestational trophoblaslic disease. William's Gynecology.pdf, McGraw Hill access Medicine 2008: 1509·1541. 136. Moore L. Hydatidiform mole. Medscapc.

  10. Download this PDF file

    African Journals Online (AJOL)

    ONIKOYI

    of Lake Chad) according to forecasts, will worsen by 2025, further increasing women and girl's burden of collecting and ... Nigeria climate change.org/docs/ 2011/case_study_Greenwatch.pdf). Most often, the responsibility of provision of water supply infrastructure are left within the domain of the government. This is because ...

  11. Download this PDF file

    African Journals Online (AJOL)

    HENRY

    Anaemia is common in human immunodeficiency virus infection, particularly in patients with acquired immunodeficiency ... The combined effect of all these factors in pregnancy will worsen the poor maternal and ... 010_country_progress_report_en.pdf. 4. Agboola A. Severe anaemia in pregnancy: In: Agboola A. (Editor).

  12. Presumed consent in organ donation: the devil is in the detail

    OpenAIRE

    Hutchinson, Odette

    2008-01-01

    This article follows the recent publication of the Organs for Donation Task Force report, "Organs for Transplants", and considers the debate surrounding a change in the law in favour of presumed consent in organ donation.

  13. Download this PDF file

    African Journals Online (AJOL)

    ABSTRACT. Objective: Although it is presumed that both kidneys excrete similar urinary constituents, it is a general observation that the majority of patients present with unilateral stone disease. The aim of this work was to study the laterality of recurrence in calcium stone formers. Patients and Methods: In a retrospective ...

  14. Download this PDF file

    African Journals Online (AJOL)

    on ultrasound & CT. * Patient actually received two cycles of chemotherapy for presumed nephroblastoma. The importance of establishing a diagnosis prior to planning any multimodal therapy is illustrated by four cases in Table 1. The final histological diagnosis in these cases was different from the preoperative impressions ...

  15. Download this PDF file

    African Journals Online (AJOL)

    SAM

    values rang y differed a distance; tha ow between wo major gro er accession dispersed a lar relatedne been presum n these find es, SSR mark. (Stepansky species into nthian hairin. 6 71703829(92 he terms of the ... allele patterns in melon (Morales et al., 2004) and considered as useful markers for assessing the genetic.

  16. Download this PDF file

    African Journals Online (AJOL)

    raoul

    2011-04-16

    Apr 16, 2011 ... Even though HIV is not a direct cause of neonatal death, maternal HIV status affects newborn survival by causing an increased risk of stillbirth and death in the .... number of ANC visits; we can therefore presume that these women received nutritional counseling, iron and folic acid for anemia prophylaxis.

  17. Download this PDF file

    African Journals Online (AJOL)

    economic status and sleeping in a room with a cooking fire'(l 1-13). This study was designed to assess the differences in past exposure to. “presumed risk factors like family size, number of children, face washing habit, type and distance of water source, place for cooking and cattle keeping, use of waste disposal and latrine.

  18. Download this PDF file

    African Journals Online (AJOL)

    a 3.47cm by 2.9_cm echogenic right supra renal mass. This subsequently became echolucent on serial. ,ultrasonography, presumably following liquefaction. The mass shrunk significantly over the next 15 days with regenerative changes following a period of conservative management. There was no adverse outcome. Final.

  19. Conservational PDF Equations of Turbulence

    Science.gov (United States)

    Shih, Tsan-Hsing; Liu, Nan-Suey

    2010-01-01

    Recently we have revisited the traditional probability density function (PDF) equations for the velocity and species in turbulent incompressible flows. They are all unclosed due to the appearance of various conditional means which are modeled empirically. However, we have observed that it is possible to establish a closed velocity PDF equation and a closed joint velocity and species PDF equation through conditions derived from the integral form of the Navier-Stokes equations. Although, in theory, the resulted PDF equations are neither general nor unique, they nevertheless lead to the exact transport equations for the first moment as well as all higher order moments. We refer these PDF equations as the conservational PDF equations. This observation is worth further exploration for its validity and CFD application

  20. Quantum Computation with Ultrafast Laser Pulse Shaping

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 10; Issue 6. Quantum Computation with Ultrafast Laser Pulse Shaping. Debabrata Goswami. General Article Volume 10 Issue 6 June 2005 pp 8-14. Fulltext. Click here to view fulltext PDF. Permanent link:

  1. Listening to the Shape of a Drum

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 3; Issue 9. Listening to the Shape of a Drum - The Mathematics of Vibrating Drums. S Kesavan. General Article Volume 3 Issue 9 September 1998 pp 26-34. Fulltext. Click here to view fulltext PDF. Permanent link:

  2. Adobe Acrobat X PDF Bible

    CERN Document Server

    Padova, Ted

    2011-01-01

    The classic Acrobat and PDF reference, updated to cover the latest release. Consistently the most authoritative and comprehensive resource on Acrobat and PDF format, this standard reference returns with in-depth coverage of the newest version of Acrobat. Written by bestselling author Ted Padova, this book is packed with real-world insights and techniques gained from Padova's daily use of Acrobat and PDF under deadline constraints. You'll discover everything there is to know about using Acrobat and PDF for print prepress, the Internet, CD-ROMs, and other forms of media.: Popular author Ted Pado

  3. PDF Modeling of Turbulent Combustion

    National Research Council Canada - National Science Library

    Pope, Stephen B

    2006-01-01

    .... The PDF approach to turbulent combustion has the advantages of fully representing the turbulent fluctuations of species and temperature, and of allowing realistic combustion chemistry to be implemented...

  4. 41 CFR 301-72.1 - Why is common carrier presumed to be the most advantageous method of transportation?

    Science.gov (United States)

    2010-07-01

    ... presumed to be the most advantageous method of transportation? 301-72.1 Section 301-72.1 Public Contracts... Transportation § 301-72.1 Why is common carrier presumed to be the most advantageous method of transportation? Travel by common carrier is presumed to be the most advantageous method of transportation because it...

  5. Robust functional statistics applied to Probability Density Function shape screening of sEMG data.

    Science.gov (United States)

    Boudaoud, S; Rix, H; Al Harrach, M; Marin, F

    2014-01-01

    Recent studies pointed out possible shape modifications of the Probability Density Function (PDF) of surface electromyographical (sEMG) data according to several contexts like fatigue and muscle force increase. Following this idea, criteria have been proposed to monitor these shape modifications mainly using High Order Statistics (HOS) parameters like skewness and kurtosis. In experimental conditions, these parameters are confronted with small sample size in the estimation process. This small sample size induces errors in the estimated HOS parameters restraining real-time and precise sEMG PDF shape monitoring. Recently, a functional formalism, the Core Shape Model (CSM), has been used to analyse shape modifications of PDF curves. In this work, taking inspiration from CSM method, robust functional statistics are proposed to emulate both skewness and kurtosis behaviors. These functional statistics combine both kernel density estimation and PDF shape distances to evaluate shape modifications even in presence of small sample size. Then, the proposed statistics are tested, using Monte Carlo simulations, on both normal and Log-normal PDFs that mimic observed sEMG PDF shape behavior during muscle contraction. According to the obtained results, the functional statistics seem to be more robust than HOS parameters to small sample size effect and more accurate in sEMG PDF shape screening applications.

  6. Secondary prevention after cerebral ischaemia of presumed arterial origin: is aspirin still the touchstone?

    NARCIS (Netherlands)

    A. Algra (Ale); P.J. Koudstaal (Peter Jan); J. van Gijn (Jan)

    1999-01-01

    textabstractPatients who have had a transient ischaemic attack or nondisabling ischaemic stroke of presumed arterial origin have an annual risk of death from all vascular causes, non-fatal stroke, or non-fatal myocardial infarction that ranges between 4% and 11% without treatment. In the

  7. A randomized trial of anticoagulants versus aspirin after cerebral ischemia of presumed arterial origin

    NARCIS (Netherlands)

    Franke, CL; Koehler, PJJ; Gorter, JW; Kappelle, LJ; Rinkel, GJE; Tjeerdsma, HC; van Gijn, J; Dammers, JWHH; Straatman, HJS; ten Houten, R; Veering, MM; Bakker, SLM; Dippel, D; Koudstaal, PJ; van Gemert, HMA; van Swieten, JC; Horn, J; Kwa, IH; Limburg, M; Stam, J; Boon, AM; Lieuwens, WHG; Visscher, F; Bouwsma, C; Rutgers, AWF; Snoek, JW; Brouwers, PJAM; Nihom, J; Solleveld, H; Carbaat, PAT; Hertzberger, LI; Kleijweg, RP; Nanninga-van den Neste, VMH; van Diepen, AJH; Linssen, WHJP; Vanneste, JAL; Vos, J; Weinstein, HC; Schipper, JP; Berntsen, PJIM; de Vries-Leenders, EM; Geervliet, JP; Tans, RJJ; Feikema, WJ; Lohmann, HJHM; van Kasteel, [No Value; Jongebloed, FA; Leyten, QH; van Wensen, PJM; Jansen, C; Driesen, JJM; van Oudenaarden, WF; Verhey, JCB; Bottger, HRF; Driessen-Kletter, MF; Zwols, F; van der Gaast, JB; Wittebol, MC; van Oostenbrugge, RJ; Beintema, KD; Hilbers, J; van der Weil, HL; van Lieshout, HBM; Weststrate, W; Bernsen, PLJA; Frenken, CWGM; Poels, EFJ; Lindeboom, SF; van der Steen, A; Glimmerveen, WF; Martens, EIF; Bulens, C; de Vries-Bos, LHP; Venables, GS; Koster, JG; Sinnige, LGF; Klaver, MM; Koetsveld-Baart, JC; Mauser, HW; van Geusau, RBA; Dijkman, MH; Hoppenbrouwers, WJJF; Banford, WJJF; Briet, PE; Eekhof, JLA; Witjes, R; Hamburger, HL; van der Sande, JJ; Bath, P; Hankey, GJ; Koning, E; Ricci, S; Berendes, JN; Hooff, LJMA; van Spreeken, ACGA; Kuhler, AR; Mallo, GN; van Walbeek, HK; Gauw, JC; Vermeij, AJ; Verheij, JCB; Swen, JWA; Canhao, P; Keyser, A; Holscher, RS; de Jong, GJ; Kraaier, [No Value; Algra, A; Briet, E; deVries-Goldschemdingi, J; Eikelboom, BC; Greebe, P; Hauer, RNW; Hermsen, MG; Loeliger, EA; Pop, GAM; Rosendaal, FR; Schobben, AFAM; Sixma, FF; Slabbers, DCV; Tijssen, JCP; van Creval, H; van Es, GA; Verheugt, FWA; Vermeulin, M; Wulfsen, EKM; van der Meer, W.K.; Wever, Eric F. D.; Don, J

    1997-01-01

    Aspirin is only modestly effective in the secondary prevention after cerebral ischemia Studies in other vascular disorders suggest that anticoagulant drugs in patients with cerebral ischemia of presumed arterial (noncardiac) origin might be more effective. The aim of the Stroke Prevention in

  8. Presumed Perinatal Stroke in a Child with Down Syndrome and Moyamoya Disease

    Science.gov (United States)

    Pysden, Karen; Fallon, Penny; Moorthy, Bhagavatheswaran; Ganesan, Vijeya

    2010-01-01

    Moyamoya disease describes a cerebral arteriopathy characterized by stenosis or occlusion of the terminal internal carotid and/or the proximal middle cerebral arteries. We report a female child with trisomy 21 and bilateral moyamoya disease who presented, unusually, with a presumed perinatal cerebral infarct. The clinical, radiological, and…

  9. 28 CFR 104.44 - Determination of presumed noneconomic losses for decedents.

    Science.gov (United States)

    2010-07-01

    ... 28 Judicial Administration 2 2010-07-01 2010-07-01 false Determination of presumed noneconomic losses for decedents. 104.44 Section 104.44 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) SEPTEMBER 11TH VICTIM COMPENSATION FUND OF 2001 Amount of Compensation for Eligible Claimants. § 104.44...

  10. 28 CFR 104.46 - Determination of presumed noneconomic losses for claimants who suffered physical harm.

    Science.gov (United States)

    2010-07-01

    ... 28 Judicial Administration 2 2010-07-01 2010-07-01 false Determination of presumed noneconomic losses for claimants who suffered physical harm. 104.46 Section 104.46 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) SEPTEMBER 11TH VICTIM COMPENSATION FUND OF 2001 Amount of Compensation for...

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    Nekky Umera

    that can be treated as a quadratic functional that can be minimized over a region. ... formed using Euler equivalent integral and finite element shape function for ..... 445. Indexed African Journals Online: www.ajol.info. Where NI, N2, N8, are shape functions at nodes 1, 2 and 8and Ф the interpolation function. NI = 1. 2Ae.

  12. Schapiro Shapes

    Science.gov (United States)

    O'Connell, Emily

    2009-01-01

    This article describes a lesson on Schapiro Shapes. Schapiro Shapes is based on the art of Miriam Schapiro, who created a number of works of figures in action. Using the basic concepts of this project, students learn to create their own figures and styles. (Contains 1 online resource.)

  13. Optical coherence tomography of macular atrophy associated with microcephaly and presumed intrauterine Zika virus infection

    Directory of Open Access Journals (Sweden)

    Adriana Gondim de Moura Campos

    Full Text Available ABSTRACT This case report describes the retinal optical coherence tomography (OCT findings in a microcephalic infant with macular atrophy presumably caused by intrauterine Zika virus infection. OCT demonstrated atrophy of the outer retinal layers and choriocapillaris, including the outer nuclear layer and ellipsoid zone, associated with retinal pigment epithelium hyper-reflectivity and increased OCT penetration into deeper layers of the choroid and sclera. A major concern associated with this infection is the apparent increased incidence of microcephaly in fetuses born to mothers infected with the Zika virus. It is becoming increasingly difficult to ignore the upsurge in congenital microcephaly observed in Brazil. Recently, ocular findings in infants with microcephaly associated with intrauterine Zika virus infection have been described. This is the first report of OCT imaging of macular atrophy in a child with presumed Zika virus infection-associated microcephaly.

  14. Presumed Cases of Mumps in Pregnancy: Clinical and Infection Control Implications

    Directory of Open Access Journals (Sweden)

    Svjetlana Lozo

    2012-01-01

    Full Text Available Recently, a mumps outbreak in New York and New Jersey was reported by the Centers for Disease Control and Prevention (CDC. Subsequently, the dissemination of the disease was rapid, and, from June 28th 2009 through January 29th 2010, a total of 1,521 cases of mumps were reported in New York and New Jersey. Seven presumed cases occurred in pregnant women cared for at our institution. Mumps diagnosis as per the NYC Department of Health and Mental Hygiene was based on clinical manifestations, particularly parotitis. Prior immunizations with mumps vaccine and negative IgM were not adequate to rule out mumps infections. All of our seven patients had exposure to mumps in either their household or their community, and some of the them had symptoms of mumps. Due to the difficulties in interpreting serologies of these patients, their cases led to a presumed diagnosis of mumps. The diagnosis of mumps lead to the isolation of patients and health care personnel that were in contact with them. In this paper, we detail the presenting findings, diagnostic dilemmas and infection control challenges associated with presumed cases of mumps in pregnancy.

  15. Treatment of CNV secondary to presumed ocular histoplasmosis with intravitreal aflibercept 2.0 mg injection.

    Science.gov (United States)

    Walia, Harpreet S; Shah, Gaurav K; Blinder, Kevin J

    2016-04-01

    To assess the efficacy and safety of intravitreal aflibercept injection in the treatment of CNV secondary to presumed ocular histoplasmosis syndrome (POHS). To assess safety of intravitreal aflibercept for the treatment of CNV secondary to presumed ocular histoplasmosis syndrome. Masked, open-label, prospective study. Five subjects will receive 2.0 mg aflibercept injection every 8 weeks with 3 initial monthly doses over a 12 month period. No adverse systemic or ocular were reported. At month six, the mean visual acuity improved by 7.8 ETDRS letters, mean central subfoveal thickness decreased by 38.8 microns and mean OCT volume decreased by 0.076 mm3 . At month twelve, the mean visual acuity improved by 12.4 ETDRS letters, mean central subfoveal thickness decreased by 34.6 microns and mean OCT volume decreased by 0.576 mm3. The use of intravitreal 2.0 mg aflibercept injection for the treatment of CNV secondary to presumed ocular histoplasmosis syndrome yielded no systemic or ocular adverse events and produced improvement in visual acuity and reduction of OCT thickness and volume. Copyright © 2016 Canadian Ophthalmological Society. Published by Elsevier Inc. All rights reserved.

  16. Mutations in btk in patients with presumed X-linked agammaglobulinemia.

    Science.gov (United States)

    Conley, M E; Mathias, D; Treadaway, J; Minegishi, Y; Rohrer, J

    1998-01-01

    In 1993, two groups showed that X-linked agammaglobulinemia (XLA) was due to mutations in a tyrosine kinase now called Btk. Most laboratories have been able to detect mutations in Btk in 80%-90% of males with presumed XLA. The remaining patients may have mutations in Btk that are difficult to identify, or they may have defects that are phenotypically similar to XLA but genotypically different. We analyzed 101 families in which affected males were diagnosed as having XLA. Mutations in Btk were identified in 38 of 40 families with more than one affected family member and in 56 of 61 families with sporadic disease. Excluding the patients in whom the marked decrease in B cell numbers characteristic of XLA could not be confirmed by immunofluorescence studies, mutations in Btk were identified in 43 of 46 patients with presumed sporadic XLA. Two of the three remaining patients had defects in other genes required for normal B cell development, and the third patient was unlikely to have XLA, on the basis of results of extensive Btk analysis. Our techniques were unable to identify a mutation in Btk in one male with both a family history and laboratory findings suggestive of XLA. DNA samples from 41 of 49 of the mothers of males with sporadic disease and proven mutations in Btk were positive for the mutation found in their son. In the other 8 families, the mutation appeared to arise in the maternal germ line. In 20 families, haplotype analysis showed that the new mutation originated in the maternal grandfather or great-grandfather. These studies indicate that 90%-95% of males with presumed XLA have mutations in Btk. The other patients are likely to have defects in other genes. PMID:9545398

  17. Density-Based 3D Shape Descriptors

    Directory of Open Access Journals (Sweden)

    Schmitt Francis

    2007-01-01

    Full Text Available We propose a novel probabilistic framework for the extraction of density-based 3D shape descriptors using kernel density estimation. Our descriptors are derived from the probability density functions (pdf of local surface features characterizing the 3D object geometry. Assuming that the shape of the 3D object is represented as a mesh consisting of triangles with arbitrary size and shape, we provide efficient means to approximate the moments of geometric features on a triangle basis. Our framework produces a number of 3D shape descriptors that prove to be quite discriminative in retrieval applications. We test our descriptors and compare them with several other histogram-based methods on two 3D model databases, Princeton Shape Benchmark and Sculpteur, which are fundamentally different in semantic content and mesh quality. Experimental results show that our methodology not only improves the performance of existing descriptors, but also provides a rigorous framework to advance and to test new ones.

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    farms and farmers should employ the services of veterinarians for health- related issues affecting their pigs, especially in handling cases that require surgical intervention. INTRODUCTION. Tetanus is a state of muscular contraction caused by toxins produced by Clostridium tetani, a gram positive, anaerobic, rod-shaped.

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    2007-04-06

    Apr 6, 2007 ... Anderson S.J., Lindberg G. and Trocin M. What shapes general practitioners” work with depressed patients? A qualitative interview study. J. Fam. Pract. 2002; 19: 623-631. Clarke I.M.C., Morin J.E. and Warnell I. Personality factors and practice of anaesthesia: A psychometric evaluation. Can. J. Anesth.

  20. to view fulltext PDF

    Indian Academy of Sciences (India)

    Flowers in panicles are 1-1.2 cm long and 0.6-0.8 cm across, bell-shaped, both bisexual and unisexual flowers being found on the same tree. Stamens are ten with hairy filaments. Fruits resemble small grapes and are sometimes borne in great profusion becoming very conspicuous when the leaves fall. Some of the leaves ...

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    DR. AMINU

    2013-12-02

    Dec 2, 2013 ... disc equipped with radial straight vanes while neglecting particle bounce and assuming a near center feed. They also reported that the particle's radial velocity depends on the shape and the friction coefficient between a granular material and a rotary disc. For the same disc configuration, Inns and Reece.

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    komla

    seven soils: Yucatan (from Mexico), San Isidro or low; shape as flat or raised; and colour as. (Costa Rica), Itabela ..... (Mexico) soil, isolates did not form clusters either according to host or geographical origin. Isolates obtained ... Biodiversity of rhizobia which nodulate fast-growing tree legumes in tropical soils. PhD thesis,.

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    Indian Academy of Sciences (India)

    Topology is a branch of mathematics that concerns understanding 'shape' by studying the prop- erties of objects (including many abstract ones) that are invariant under continuous transforma- tions (modifications) like stretching or bending, but not tearing. Informally, topology is also referred to as rubber sheet geometry.

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    gamma ray treated and untreated yam true seeds, showed that, at the MV, generation, increasing doses of gamma rays ... (p=0.01) between first generation tuber sett weight and second generation tuber yield (r. = 0.46), first generation tuber shape ... til 1982), "The stand population was 5 ()() y in stands her block and these ...

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    0.175). * Median Survival has not been reached; ** P-Value s 0.05 is considered significant. SCC = squamous cell carcinoma, TCC = transitional cell carcinoma, W.N.B. = W-shaped neobladder, M.R.B. = modified rectal bladder, RB. = rectal bladder ...

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    Indian Academy of Sciences (India)

    lines of standard textbooks (e.g. Griem 1974) and following some of our previous works, e.g. Rosato et al. ... a non-Hermitian part accounting for natural broadening) and the Zeeman effect, and V (t) = −d · F(t) is the ... prompted an interest in the establishment of analytical line shape models accounting simultaneously for the ...

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    Owner

    African universities have also been shaped by market-driven Australian models. We now turn to the darker dimensions ... This is also applicable to those who share the same workplace, where interpersonal ... audits draw staff into policing roles through their involvement in university structures and committees in which areas ...

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    Pietro

    2013-07-02

    Jul 2, 2013 ... Distributed feedback structures, Spectroscopy. 1. Introduction. Quantum ... feedback grating on the waveguide provided by Alpes Lasers ... The divergence takes an elliptical shape. In order to define its magnitude, the area where the emission is more than 50% of the maximum (the area encircled by the ...

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    For bacterial spore counting, appropriate dilutions were heat~treated at 80° C for 10 min in a water bath, and plated ... They were purified by repeated plating after colony counting. Cell shape, cell grouping pattern, .... This study produced basic data on the microbial dynamics which occur during the fermentation of shamita.

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    David

    clothing (Odhiambo, 2008; CNBC Business, 2010). It is common knowledge that in some cultures, mainly in Africa, the bottom-heavy body shape typifies a sub- stantial percentage of black African women (Zwane &. Magagula, 2007). In an effort to create loyal custom- ers, retailers pride themselves on a unique fit through.

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    GB

    Ethiop J Health Sci. Vol. 24, No. 3. July2014. 274 of maxillary central incisor, which is attributed as very rare 'U-shape' morphology to the tooth. CASE REPORT. A 15 years old male patient reported with missing upper front teeth on left side. His mother revealed he had history of trauma when he was 4 years old. The trauma ...

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    Indian Academy of Sciences (India)

    been obtained within PDM for oxygen and calcium isotopes, respectively. The shapes of the photoabsorption cross section calculated for stable isotopes "*O and **Ca are found in overall reasonable agreement with available experimental data [1,22,23} as shown in the left panels of figures 7a-d. This agreement is obviously ...

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    Indian Academy of Sciences (India)

    In a similar fashion, two L- shaped RNAs can be placed symmetrically to build a scaffold ... of the ribosome. However, wherever life originated, we are certain that the modern biological system is a product of a ... in private universities by the Ministry of Education, Culture,. Sports, Science and Technology (MEXT), Japan.

  14. Validity of chronic drug exposure presumed from repeated patient interviews varied according to drug class.

    Science.gov (United States)

    Noize, Pernelle; Bazin, Fabienne; Pariente, Antoine; Dufouil, Carole; Ancelin, Marie-Laure; Helmer, Catherine; Moore, Nicholas; Fourrier-Réglat, Annie

    2012-10-01

    To evaluate the validity of chronic drug exposure presumed from cross-sectional interviews taking reimbursement data as reference. The study concerned 2,985 elderly persons of the French Three-City cohort (1) who were interviewed on current drug use 2 and 4 years after inclusion and (2) whose reimbursement data were obtained from the main health care insurance system. Validity (sensitivity, Se; specificity, Sp; positive predictive value, PPV; negative predictive value, NPV) of chronic exposure presumed from follow-up interviews was investigated taking two exposure definitions from reimbursements as reference for the period between interviews: at least 80% coverage with and without a maximal time between reimbursements of 60 days. Using 80% coverage as reference, validity of interview data was substantial for cardiovascular and antithrombotic drugs (Se, 85.3-95.4%; Sp, 67.1-97.6%; PPV, 65.9-86.6%; NPV, 93.3-99.3%). For benzodiazepines, nonsteroidal anti-inflammatory drugs, or analgesics, validity was low especially owing to PPVs (15.8-51.4%). Using reported use at cross-sectional interviews as a proxy for chronic exposure between interviews was valid for drugs used regularly but not so for drugs used more irregularly. Copyright © 2012 Elsevier Inc. All rights reserved.

  15. Echocardiographic findings in infants with presumed congenital Zika syndrome: Retrospective case series study.

    Directory of Open Access Journals (Sweden)

    Danielle Di Cavalcanti

    Full Text Available To report the echocardiographic evaluation of 103 infants with presumed congenital Zika syndrome.An observational retrospective study was performed at Instituto de Medicina Integral Prof. Fernando Figueira (IMIP, Recife, Brazil. 103 infants with presumed congenital Zika syndrome. All infants had microcephaly and head computed tomography findings compatible with congenital Zika syndrome. Zika IgM antibody was detected in cerebrospinal fluid samples of 23 infants. In 80 infants, the test was not performed because it was not available at that time. All infants had negative serology for HIV, syphilis, rubella, cytomegalovirus and toxoplasmosis. A complete transthoracic two-dimensional, M-mode, continuous wave and pulsed wave Doppler and color Doppler echocardiographic (PHILIPS HD11XE or HD15 examination was performed on all infants.14/103 (13.5% echocardiograms were compatible with congenital heart disease: 5 with an ostium secundum atrial septal defect, 8 had a hemodynamically insignificant small apical muscular ventricular septal defect and one infant with dyspnea had a large membranous ventricular septal defect. The echocardiograms considered normal included 45 infants with a persistent foramen ovale and 16 with a minimum patent ductus arteriosus.Preliminarily this study suggests that congenital Zika syndrome may be associated with an increase prevalence of congenital heart disease. However the types of defects noted were septal defects, a proportion of which would not be hemodynamically significant.

  16. A Case of Presumed Tuberculosis Uveitis with Occlusive Vasculitis from an Endemic Region

    Directory of Open Access Journals (Sweden)

    Berna Başarır

    2017-06-01

    Full Text Available In this report, we present a case with presumed unilateral tuberculosis uveitis from an endemic region. A 23-year-old male presented with decreased vision in his left eye for 15 days. Visual acuities were 1.0 in his right eye and 0.3 in his left eye. Ophthalmologic examination was normal for the right eye. Slit-lamp examination revealed 2+ cells in the vitreous without anterior chamber reaction in his left eye. Fundus examination revealed occlusive vasculitis and granuloma. His history revealed that he had a respiratory infection with fever 3 months ago while visiting his native country, Rwanda, and was treated with non-specific antibiotic therapy. His visual symptom started 2 weeks after his systemic symptoms resolved. Laboratory findings included 15 mm induration in purified protein derivative tuberculin skin test, HIV negativity, and parenchymal lesions in chest X-ray. Bronchoalveolar lavage was negative for acid-fast bacillus. A pulmonary disease consultant reported presumed tuberculosis because of the patient’s history. Anti-tuberculosis treatment was initiated. The patient’s visual acuity improved rapidly and his signs regressed. A careful history should be taken from patients with uveitis. Travel to tuberculosis-endemic areas may be important for diagnosis and should be asked about directly.

  17. Presumed late recurrence of Acanthamoeba keratitis exacerbated by exposure to topical corticosteroids

    Directory of Open Access Journals (Sweden)

    Dipika V Patel

    2013-01-01

    Full Text Available A 28-year-old female with a history of contact lens wear presented with a 1 week history of pain and photophobia in her left eye. In vivo confocal microscopy (IVCM and corneal scrape confirmed the diagnosis of Acanthamoeba keratitis (AK which was treated with intensive topical propamidine isethionate (0.1% and chlorhexidine (0.02% with tapering dosage over 11 months. Five years after complete resolution of AK and cessation of all contact lens wear, the subject presented to her optometrist with a history of ocular discomfort and mild photophobia. Without further investigation she was prescribed topical corticosteroids. Three weeks later she presented with pain and reduced vision in the left eye. Slit-lamp examination revealed focal, inferior corneal stromal edema. IVCM confirmed widespread Acanthamoeba cysts. Treatment with topical polyhexamethylene biguanide (PHMB 0.02% and propamidine isethionate 0.1% resulted in resolution of the AK. Despite an initially mild AK, this subject presumably retained viable Acanthamoeba cysts in her cornea 5 years after the initial episode. This report highlights the importance of caution when using corticosteroids in patients with a previous history of AK, even in the relatively distant past. Patients with AK should be warned regarding the risks of recurrence following presumed resolution.

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    (pH 6.0 to 8.0) and borate buffers (pH 8), each of total ionic strength of 0.05 M. The solutions were allowed to equilibrare at the desired temperature. The kinetics of ... was measured with a Finn pipette into a glass rod shaped in a shallow spoon form. The rod was used to add the DTNB solution and to stir the DTNB catalase ...

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    2005-01-15

    Jan 15, 2005 ... Lemon yellow with very deep red base, pentamerous: shape obovate: 3.8-4.8 cm long and 2.2–3.8 cm wide. obovate. 0.3-0.4 cm long: filament red: anther yellow. Style light red; 1.8-. 2.1 cm long; stigma .... mudflats near the sea; also and on rocky grounds planted in front of houses, cultivated as ornamental ...

  20. New frontiers in PDF determination

    CERN Multimedia

    CERN. Geneva

    2016-01-01

    Parton Distribution Functions (PDFs) are a crucial input at the LHC, their uncertainty often being the limiting factor in the accuracy of theoretical predictions. At the same time the LHC is delivering a number of precise measurements that have the potential to greatly constrain these functions. I will give an overview on the theory behind and on the state of the art of PDF determination. I will then mention the new theoretical and methodological challenges in modern PDF fits and explore the precision frontiers opened by the accuracy of the LHC data.

  1. Combined in situ PXRD and PDF study of hydrothermal formation of α- and β-MnO2 nanocrystallites

    DEFF Research Database (Denmark)

    Birgisson, Steinar; Shen, Yanbin; Saha, Dipankar

    and temperature is extracted. TS data is Fourier transformed to obtain the pair distribution function (PDF). By conducting real space refinements against the PDF, information about local and average structure of all chemical species in the reaction solution (ranging from complexes in solution to amorphous...... Nanostructures of Novel Shapes and Their Application in Batteries. Inorganic Chemistry, 2006. 45(5): p. 2038-2044. 5. Becker, J., et al., Experimental setup for in situ X-ray SAXS/WAXS/PDF studies of the formation and growth of nanoparticles in near- and supercritical fluids. J. Appl. Crystallogr., 2010. 43...

  2. Presumed appendiceal abscess discovered to be ruptured Meckel diverticulum following percutaneous drainage

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Jeannie C.; Ostlie, Daniel J. [Children' s Mercy Hospital, Department of Surgery, Kansas City, MO (United States); Rivard, Douglas C.; Morello, Frank P. [Children' s Mercy Hospital, Department of Radiology, Kansas City, MO (United States)

    2008-08-15

    A Meckel diverticulum is an embryonic remnant of the omphalomesenteric duct that occurs in approximately 2% of the population. Most are asymptomatic; however, they are vulnerable to inflammation with subsequent consequences including diverticulitis and perforation. We report an 11-year-old boy who underwent laparoscopic appendectomy for perforated appendicitis at an outside institution. During his convalescence he underwent percutaneous drainage of a presumed postoperative abscess. A follow-up drain study demonstrated an enteric fistula. The drain was slowly removed from the abdomen over a period of 1 week. Three weeks following drain removal the patient reported recurrent nausea and abdominal pain. A CT scan demonstrated a 3.7-cm rim-enhancing air-fluid level with dependent contrast consistent with persistent enteric fistula and abscess. Exploratory laparoscopy was performed, at which time a Meckel diverticulum was identified and resected. This case highlights the diagnostic challenge and limitations of conventional radiology in complicated Meckel diverticulum. (orig.)

  3. Can "presumed consent" justify the duty to treat infectious diseases? An analysis

    Directory of Open Access Journals (Sweden)

    Arda Berna

    2008-03-01

    Full Text Available Abstract Background AIDS, SARS, and the recent epidemics of the avian-flu have all served to remind us the debate over the limits of the moral duty to care. It is important to first consider the question of whether or not the "duty to treat" might be subject to contextual constraints. The purpose of this study was to investigate the opinions and beliefs held by both physicians and dentists regarding the occupational risks of infectious diseases, and to analyze the argument that the notion of "presumed consent" on the part of professionals may be grounds for supporting the duty to treat. Methods For this cross-sectional survey, the study population was selected from among physicians and dentists in Ankara. All of the 373 participants were given a self-administered questionnaire. Results In total, 79.6% of the participants said that they either had some degree of knowledge about the risks when they chose their profession or that they learned of the risks later during their education and training. Of the participants, 5.2% said that they would not have chosen this profession if they had been informed of the risks. It was found that 57% of the participants believed that there is a standard level of risk, and 52% of the participants stated that certain diseases would exceed the level of acceptable risk unless specific protective measures were implemented. Conclusion If we use the presumed consent argument to establish the duty of the HCW to provide care, we are confronted with problems ranging over the difficulty of choosing a profession autonomously, the constant level of uncertainty present in the medical profession, the near-impossibility of being able to evaluate retrospectively whether every individual was informed, and the seemingly inescapable problem that this practice would legitimize, and perhaps even foster, discrimination against patients with certain diseases. Our findings suggest that another problem can be added to the list: one

  4. Therapeutic High-Density Barium Enema in a Case of Presumed Diverticular Hemorrhage

    Directory of Open Access Journals (Sweden)

    Nonthalee Pausawasdi

    2011-02-01

    Full Text Available Many patients with lower gastrointestinal bleeding do not have an identifiable source of bleeding at colonoscopy. A significant percentage of these patients will have recurrent bleeding. In many patients, the presence of multiple diverticula leads to a diagnosis of presumed diverticular bleeding. Current treatment options include therapeutic endoscopy, angiography, or surgical resection, all of which depend on the identification of the diverticular source of bleeding. This report describes a case of recurrent bleeding in an elderly patient with diverticula but no identifiable source treated successfully with barium impaction therapy. This therapeutic modality does not depend on the identification of the bleeding diverticular lesion and was well tolerated by our 86-year-old patient.

  5. Recurrent presumed herpes simplex keratitis and episcleritis in keratosis follicularis (Darier's disease).

    Science.gov (United States)

    Radia, Meera; Gilhooley, Michael James; Panos, Chris; Claoué, Charles

    2015-07-16

    Keratosis follicularis (Darier's disease) is an autosomal dominant dermatological disorder characterised by abnormal epidermal differentiation and loss of normal cell-to-cell adhesion. Cardinal features include diffuse hyperkeratotic warty papules with scaly plaques in seborrhoeic regions with associated mucous membrane changes. Darier's disease is rare (prevalence 2.7 in 100,000), with few ocular sequelae reported: commonly dry eye with or without Sjögren's syndrome. This is the first report, to the best of our knowledge, to describe a case of recurrent herpes simplex virus (HSV) keratitis and episcleritis in a 47-year-old man suffering from Darier's disease. The patient's condition predisposed him towards developing ocular complications due to several factors: impaired desmosome function leading to poor cell-to-cell adhesion in the corneal epithelium, dry eye and HSV invasion of inflamed periocular skin presumably combining to allow viral colonisation of a poorly protected cornea. 2015 BMJ Publishing Group Ltd.

  6. Prevalence of autoimmune pancreatitis and other benign disorders in pancreatoduodenectomy for presumed malignancy of the pancreatic head

    NARCIS (Netherlands)

    M. van Heerde (Marc); K. Biermann (Katharina); P.E. Zondervan (Pieter); G. Kazemier (Geert); C.H.J. van Eijck (Casper); C.J. Pek (Chulja); E.J. Kuipers (Ernst); H.R. van Buuren (Henk)

    2012-01-01

    textabstractBackground: Occasionally patients undergoing resection for presumed malignancy of the pancreatic head are diagnosed postoperatively with benign disease. Autoimmune pancreatitis (AIP) is a rare disease that mimics pancreatic cancer. We aimed to determine the prevalence of benign disease

  7. A Study Regarding Attitudes Ofyoung Slum Dwelling Females Towards Their Husband/Sex Partner Presuming Them Hiv Infected

    OpenAIRE

    Monica Shukla; J P Srivastava; V K Srivastava; S C Saxena; Seema Nigam

    2004-01-01

    Research Question : What is the attitude of young females towards their husband or sex partners presuming them infected with HIV?Objectives : Attitude of young slum dwelling females towards husband or sex partner presuming them HIV infectedaccording to age of respondentsaccording to marital status of respondentsaccording to occupation of respondentsaccording to literacy status of respondents Study Design : Cross sectional studyStudy Area : 10% of the Slums of Kanpur City having population les...

  8. An Experiment that Shaped the Physics of the Century

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 16; Issue 11. An Experiment that Shaped the Physics of the Century. Rohini Godbole. General Article Volume 16 Issue 11 November 2011 pp 1019-1028. Fulltext. Click here to view fulltext PDF. Permanent link:

  9. Feline dry eye syndrome of presumed neurogenic origin: a case report.

    Science.gov (United States)

    Sebbag, Lionel; Pesavento, Patricia A; Carrasco, Sebastian E; Reilly, Christopher M; Maggs, David J

    2018-01-01

    A 14-year-old female spayed Abyssinian cat, which about 1 year previously underwent thoracic limb amputation, radiotherapy and chemotherapy for an incompletely excised vaccine-related fibrosarcoma, was presented for evaluation of corneal opacity in the left eye (OS). The ocular surface of both eyes (OU) had a lackluster appearance and there was a stromal corneal ulcer OS. Results of corneal aesthesiometry, Schirmer tear test-1 (STT-1) and tear film breakup time revealed corneal hypoesthesia, and quantitative and qualitative tear film deficiency OU. Noxious olfactory stimulation caused increased lacrimation relative to standard STT-1 values suggesting an intact nasolacrimal reflex. Various lacrimostimulants were administered in succession; namely, 1% pilocarpine administered topically (15 days) or orally (19 days), and topically applied 0.03% tacrolimus (47 days). Pilocarpine, especially when given orally, was associated with notable increases in STT-1 values, but corneal ulceration remained/recurred regardless of administration route, and oral pilocarpine resulted in gastrointestinal upset. Tacrolimus was not effective. After 93 days, the cat became weak and lame and a low thyroxine concentration was detected in serum. The cat was euthanized and a necropsy performed. Both lacrimal glands were histologically normal, but chronic neutrophilic keratitis and reduced conjunctival goblet cell density were noted OU. The final diagnosis was dry eye syndrome (DES) of presumed neurogenic origin, associated with corneal hypoesthesia. This report reinforces the importance of conducting tearfilm testing in cats with ocular surface disease, as clinical signs of DES were different from those described in dogs.

  10. Presumed congenital infection by Zika virus: findings on psychomotor development - a case report

    Directory of Open Access Journals (Sweden)

    Ana Carla Gomes Botelho

    Full Text Available Abstract Introduction: the identification of Zika virus (ZikV in the amniotic fluid, in the placenta and in newborns' brains suggests a neurotropism of this agent in the brain development, resulting in neuro-psycho-motor alterations. Thus, this present study reports the assessment of children diagnosed by a congenital infection, presumably by ZikV, followed-up at the Rehabilitation Center Prof. Ruy Neves Baptist at the Instituto de Medicina Integral Prof. Fernando Figueira (IMIP. Description: as proposed by the Ministry of Health, the following instruments were used to evaluate the neuro-motor functions of four children with microcephaly aged between three and four months: The Test of Infant Motor Performance (TIMP; the functional vision assessment; the manual function scale development; and the clinical evaluation protocol on pediatric dysphagia (PAD-PED. Discussion: the children evaluated presented atypical motor performance, muscle tone and spontaneous motricity which encompass the symmetry and the motion range of the upper and lower limbs proven to be altered. The functional vision showed alterations which can cause limitations in the performance of functional activities and the learning process. Regarding to the speech articulator's functions observed that the maturation and coordination of sucking, swallowing and breathing did not yet encounter the appropriate age maturity level.

  11. The syndrome of presumed ocular histoplasmosis in Mexico: a preliminary study.

    Science.gov (United States)

    Pedroza-Seres, M; Quiroz-Mercado, H; Granados, J; Taylor, M L

    1994-01-01

    A study to screen for the syndrome of presumed ocular histoplasmosis (SPOH) among native populations from three Mexican states was performed. Two of these states, Guerrero and Querétaro, were selected as histoplasmosis is endemic there, whereas Tlaxcala was considered a control, due to the absence of reported cases. A total of 253 individuals were submitted to ocular fundus examination to obtain evidence of SPOH. A high percentage of positive reactors to histoplasmin skin test (ST) was observed in Guerrero (83%) and Querétaro (53%), whereas in Tlaxcala positive ST were almost absent (2.04%). Only five individuals had retinal lesions, although these lesions were not characteristic of the syndrome. Stimulation of these individual's cells showed different patterns in the histoplasmin-induced lymphocyte transformation response, and two out of five individuals with retinal lesions presented a stimulated response, as well as three controls without lesions. Histocompatibility antigens (HLA) were determined in a sample of each population and no particular allele, including HLA-B7, was found to be related to SPOH as reported in the USA; however, HLA-B22 was found in three individuals who developed pulmonary histoplasmosis. Results do not provide clinical evidence or data on specific HLA risk factors, for the presence of SPOH in the population studied.

  12. Clinical Course of a Presumed Metastatic Uveal Melanoma to the Contralateral Choroid.

    Science.gov (United States)

    Caminal Mitjana, Josep M; Vilà Grané, Natàlia; Adán Civera, Alfredo; Sabater, Noelia; Arias Barquet, Lluis; Rubio Caso, Marcos J

    2015-01-01

    We present the ultrasound and optic coherence tomography follow-up of a presumed choroidal metastasis from a contralateral melanoma. A 53-year-old male was diagnosed with uveal melanoma with extraescleral extension in his left eye. A year later, the fundus examination revealed a flat, gray-green, pigmented choroidal lesion in the right eye. The ultrasonography showed a mass, almost flat, and all these findings were compatible with a choroidal melanocytic lesion with risk factors for growth. One month later, melanocytic skin lesions appeared on the scalp, as well as small tumors. Three months later, an ultrasonography on B scan showed a growth of the tumor size. The patient developed a progressive deterioration and died. Three possibilities can explain the occurrence of a choroidal pigmented tumor in the contralateral eye: first, bilateral primary choroidal melanomas; second, both choroidal tumors are metastatic in origin from an unknown primary melanoma; and third, the contralateral tumor is a metastatic tumor from the primary choroidal melanoma.

  13. Presumable incipient hybrid speciation of door snails in previously glaciated areas in the Caucasus.

    Science.gov (United States)

    Koch, Eva L; Neiber, Marco T; Walther, Frank; Hausdorf, Bernhard

    2016-04-01

    Homoploid hybrid speciation, speciation by hybridization without a change in chromosome number, may be the result of an encounter of closely related species in a habitat that is different from that usually occupied by these species. In the northwestern Caucasus the land snail species Micropontica caucasica and M. circassica form two distinct entities with little admixture at low and intermediate altitudes. However, at higher altitudes in the Lagonaki plateau, which were repeatedly glaciated, Micropontica populations with intermediate characters occur. Admixture analyses based on AFLP data demonstrated that the populations from the Lagonaki plateau are homoploid hybrids that now form a cluster separate from the parental species. The Lagonaki populations are characterized by a mtDNA haplotype clade that has been found in the parental species only once. The fixation of this haplotype clade in most hybrid populations suggests that these haplotypes are better adapted to the cooler conditions in high altitude habitats and have replaced the haplotypes of the parental species in a selective sweep. The fixation of a presumably adaptive mitochondrial haplotype clade in the Lagonaki populations is an important step towards speciation under the differential fitness species concept. Copyright © 2015 Elsevier Inc. All rights reserved.

  14. Excimer Laser Phototherapeutic Keratectomy for the Treatment of Clinically Presumed Fungal Keratitis

    Directory of Open Access Journals (Sweden)

    Liang-Mao Li

    2014-01-01

    Full Text Available This retrospective study was to evaluate treatment outcomes of excimer laser phototherapeutic keratectomy (PTK for clinically presumed fungal keratitis. Forty-seven eyes of 47 consecutive patients underwent manual superficial debridement and PTK. All corneal lesions were located in the anterior stroma and were resistant to medication therapy for at least one week. Data were collected by a retrospective chart review with at least six months of follow-up data available. After PTK, infected corneal lesions were completely removed and the clinical symptoms resolved in 41 cases (87.2%. The mean ablation depth was 114.39±45.51 μm and diameter of ablation was 4.06±1.07 mm. The mean time for healing of the epithelial defect was 8.8±5.6 days. Thirty-four eyes (82.9% showed an improvement in best spectacle-corrected visual acuity of two or more lines. PTK complications included mild to moderate corneal haze, hyperopic shift, irregular astigmatism, and thinning cornea. Six eyes (12.8% still showed progressed infection, and conjunctival flap covering, amniotic membrane transplantation, or penetrating keratoplasty were given. PTK is a valuable therapeutic alternative for superficial infectious keratitis. It can effectively eradicate lesions, hasten reepithelialization, and restore and preserve useful visual function. However, the selection of surgery candidates should be conducted carefully.

  15. ISC origin times for announced and presumed underground nuclear explosions at several test sites

    International Nuclear Information System (INIS)

    Rodean, H.C.

    1979-01-01

    Announced data for US and French underground nuclear explosions indicate that nearly all detonations have occurred within one or two tenths of a second after the minute. This report contains ISC origin-time data for announced explosions at two US test sites and one French test site, and includes similar data for presumed underground nuclear explosions at five Soviet sites. Origin-time distributions for these sites are analyzed for those events that appeared to be detonated very close to the minute. Particular attention is given to the origin times for the principal US and Soviet test sites in Nevada and Eastern Kazakhstan. The mean origin times for events at the several test sites range from 0.4 s to 2.8 s before the minute, with the earlier mean times associated with the Soviet sites and the later times with the US and French sites. These times indicate lower seismic velocities beneath the US and French sites, and higher velocities beneath the sites in the USSR 9 figures, 8 tables

  16. Clinical Features and Risk Factors of Patients with Presumed Ocular Toxoplasmosis

    Science.gov (United States)

    Fuh, Ukamaka Celestina; Omoti, Afekhide E.; Enock, Malachi E.

    2016-01-01

    Purpose: To determine the clinical features and risk factors of presumed ocular toxoplasmosis (POT) in patients affected with the condition at Irrua, Nigeria. Methods: The study included 69 patients with POT, and 69 age and sex matched subjects who served as the control group. Data was obtained using interviewer administered questionnaires. Examination included measurement of visual acuity (VA), intraocular pressure (IOP), slit lamp examination, gonioscopy and dilated fundus examination. Results: Mean age of cases and control subjects was 57.16 ± 18.69 and 56.09 ± 16.01 years respectively. The peak age group in patients with POT was 60 years and above. The most common presenting complaint was blurred vision occurring in 100% of cases. Drinking unfiltered water in 58 (84.1%) patients was the most common risk factor. Other risk factors included post cataract surgery status in 32 (46.4%) subjects, ingestion of poorly cooked meat in 30 (43.5%) cases and exposure to cats in 9 (13.0%) patients. All risk factors were more common in POT patients (P < 0.05). Out of 69 patients, 62 (89.9%) had unilateral while 7 (10.1%) had bilateral involvement. Out of 76 eyes with uveitis, 53 (69.7%) were blind. Active disease was significantly more common with increasing age (P < 0.05). Conclusion: Patients with POT were rather old and some risk factors were modifiable, therefore health education for preventing the transmission of toxoplasmosis and provision of sanitary water may help reduce the incidence of ocular toxoplasmosis. PMID:27195085

  17. Joint maximum-likelihood magnitudes of presumed underground nuclear test explosions

    Science.gov (United States)

    Peacock, Sheila; Douglas, Alan; Bowers, David

    2017-08-01

    Body-wave magnitudes (mb) of 606 seismic disturbances caused by presumed underground nuclear test explosions at specific test sites between 1964 and 1996 have been derived from station amplitudes collected by the International Seismological Centre (ISC), by a joint inversion for mb and station-specific magnitude corrections. A maximum-likelihood method was used to reduce the upward bias of network mean magnitudes caused by data censoring, where arrivals at stations that do not report arrivals are assumed to be hidden by the ambient noise at the time. Threshold noise levels at each station were derived from the ISC amplitudes using the method of Kelly and Lacoss, which fits to the observed magnitude-frequency distribution a Gutenberg-Richter exponential decay truncated at low magnitudes by an error function representing the low-magnitude threshold of the station. The joint maximum-likelihood inversion is applied to arrivals from the sites: Semipalatinsk (Kazakhstan) and Novaya Zemlya, former Soviet Union; Singer (Lop Nor), China; Mururoa and Fangataufa, French Polynesia; and Nevada, USA. At sites where eight or more arrivals could be used to derive magnitudes and station terms for 25 or more explosions (Nevada, Semipalatinsk and Mururoa), the resulting magnitudes and station terms were fixed and a second inversion carried out to derive magnitudes for additional explosions with three or more arrivals. 93 more magnitudes were thus derived. During processing for station thresholds, many stations were rejected for sparsity of data, obvious errors in reported amplitude, or great departure of the reported amplitude-frequency distribution from the expected left-truncated exponential decay. Abrupt changes in monthly mean amplitude at a station apparently coincide with changes in recording equipment and/or analysis method at the station.

  18. Neuropathological and biochemical criteria to identify acquired Creutzfeldt-Jakob disease among presumed sporadic cases.

    Science.gov (United States)

    Kobayashi, Atsushi; Parchi, Piero; Yamada, Masahito; Mohri, Shirou; Kitamoto, Tetsuyuki

    2016-06-01

    As an experimental model of acquired Creutzfeldt-Jakob disease (CJD), we performed transmission studies of sporadic CJD using knock-in mice expressing human prion protein (PrP). In this model, the inoculation of the sporadic CJD strain V2 into animals homozygous for methionine at polymorphic codon 129 (129 M/M) of the PRNP gene produced quite distinctive neuropathological and biochemical features, that is, widespread kuru plaques and intermediate type abnormal PrP (PrP(Sc) ). Interestingly, this distinctive combination of molecular and pathological features has been, to date, observed in acquired CJD but not in sporadic CJD. Assuming that these distinctive phenotypic traits are specific for acquired CJD, we revisited the literature and found two cases showing widespread kuru plaques despite the 129 M/M genotype, in a neurosurgeon and in a patient with a medical history of neurosurgery without dura mater grafting. By Western blot analysis of brain homogenates, we revealed the intermediate type of PrP(Sc) in both cases. Furthermore, transmission properties of brain extracts from these two cases were indistinguishable from those of a subgroup of dura mater graft-associated iatrogenic CJD caused by infection with the sporadic CJD strain V2. These data strongly suggest that the two atypical CJD cases, previously thought to represent sporadic CJD, very likely acquired the disease through exposure to prion-contaminated brain tissues. Thus, we propose that the distinctive combination of 129 M/M genotype, kuru plaques, and intermediate type PrP(Sc) , represents a reliable criterion for the identification of acquired CJD cases among presumed sporadic cases. © 2015 Japanese Society of Neuropathology.

  19. Feline dry eye syndrome of presumed neurogenic origin: a case report

    Directory of Open Access Journals (Sweden)

    Lionel Sebbag

    2017-12-01

    Full Text Available Case summary A 14-year-old female spayed Abyssinian cat, which about 1 year previously underwent thoracic limb amputation, radiotherapy and chemotherapy for an incompletely excised vaccine-related fibrosarcoma, was presented for evaluation of corneal opacity in the left eye (OS. The ocular surface of both eyes (OU had a lackluster appearance and there was a stromal corneal ulcer OS. Results of corneal aesthesiometry, Schirmer tear test-1 (STT-1 and tear film breakup time revealed corneal hypoesthesia, and quantitative and qualitative tear film deficiency OU. Noxious olfactory stimulation caused increased lacrimation relative to standard STT-1 values suggesting an intact nasolacrimal reflex. Various lacrimostimulants were administered in succession; namely, 1% pilocarpine administered topically (15 days or orally (19 days, and topically applied 0.03% tacrolimus (47 days. Pilocarpine, especially when given orally, was associated with notable increases in STT-1 values, but corneal ulceration remained/recurred regardless of administration route, and oral pilocarpine resulted in gastrointestinal upset. Tacrolimus was not effective. After 93 days, the cat became weak and lame and a low thyroxine concentration was detected in serum. The cat was euthanized and a necropsy performed. Both lacrimal glands were histologically normal, but chronic neutrophilic keratitis and reduced conjunctival goblet cell density were noted OU. Relevance and novel information The final diagnosis was dry eye syndrome (DES of presumed neurogenic origin, associated with corneal hypoesthesia. This report reinforces the importance of conducting tearfilm testing in cats with ocular surface disease, as clinical signs of DES were different from those described in dogs.

  20. [Childhood vaccinations anno 2004. II. The real and presumed side effects of vaccination].

    Science.gov (United States)

    Rümke, H C; Visser, H K

    2004-02-21

    Vaccinations protect to a high degree against infectious diseases, but may cause side effects. In the Netherlands since 1962 the adverse events following immunizations are registered and analysed by the National Institute of Health and Environment (RIVM). Since 1983 a permanent Committee of the Dutch Health Council reviews adverse events reported to the RIVM. With the so-called killed vaccines the side effects are mainly local (redness, swelling, pain) or general (fever, listlessness, irritability, sleep and eating problems). They are seen mainly after DPT-IPV vaccination against diphtheria, pertussis, tetanus and poliomyelitis. Some side effects occur rarely (collapse reactions, discoloured legs, persistent screaming and convulsions) and very rarely serious neurological events are reported. After MMR vaccination against measles, mumps and rubella, cases of arthritis, thrombocytopenia and ataxia are reported sporadically. Usually, they have a spontaneous recovery. During recent years a scala of diseases or symptoms have been associated with vaccination (presumed side effects). Careful and extensive investigations have shown that such hypotheses could not be supported. Examples are allergic diseases as asthma, diabetes mellitus, multiple sclerosis (after hepatitis B vaccination), autism and inflammatory bowel disease (after MMR vaccination) and sudden infant death syndrome. The total number of cases where at least a possible relation between side effects and vaccination is observed--apart from local reactions and moderate general symptoms--is very rare (about 0.25 per 1000 vaccinations) and does not balance the benefits from vaccination. There appears increasing doubt about the use and safety of vaccinations. More research is needed about the motives of people to choose for and against vaccination. The education about vaccination for parents and professionals who are involved with vaccination has to be improved. Internet can play an important role.

  1. Chorioretinal Lesions Presumed Secondary to Zika Virus Infection in an Immunocompromised Adult.

    Science.gov (United States)

    Henry, Christopher R; Al-Attar, Luma; Cruz-Chacón, Alexis M; Davis, Janet L

    2017-04-01

    Zika virus has spread rapidly throughout the Americas since 2015. The public health implications of Zika virus infection lend special importance to identifying the virus in unsuspected hosts. To describe relevant imaging studies and clinical features of chorioretinal lesions that are presumably associated with Zika virus and that share analogous features with chorioretinal lesions reported in cases of Dengue fever and West Nile virus. This is a case report from an academic referral center in Miami, Florida, of a woman in her 60s from Guaynabo, Puerto Rico, who presented with reduced visual acuity and bilateral diffuse, subretinal, confluent, placoid, and multifocal chorioretinal lesions. The patient was observed over a 5-month period. Visual acuity, clinical course, and multimodal imaging study results. Fluorescein angiography revealed early hypofluorescence and late staining of the chorioretinal lesions. Optical coherence tomography demonstrated outer retinal disruption in the placoid macular lesions. Zika RNA was detected in a plasma sample by real-time reverse transcription polymerase chain reaction testing and was suspected to be the cause of chorioretinal lesions after other viral and infectious causes were ruled out. Three weeks after the onset of symptoms, the patient's visual acuity had improved to 20/60 OD and 20/25 OS, with intraocular pressures of 18 mm Hg OD and 19 mm Hg OS. In 6 weeks, the chorioretinal lesions had healed and visual acuity had improved to 20/25 OD and 20/20 OS. Follow-up optical coherence tomography demonstrated interval recovery of the outer retina and photoreceptors. Acute-onset, self-resolving, placoid, or multifocal nonnecrotizing chorioretinal lesions may be a feature of active Zika virus chorioretinitis, as reported in other Flavivirus infections in adults. Similar findings in potentially exposed adults suggest that clinicians should consider IgM antibody or polymerase chain reaction testing for Zika virus as well as diagnostic

  2. Paroxysmal atrial fibrillation in seven dogs with presumed neurally-mediated syncope.

    Science.gov (United States)

    Porteiro Vázquez, D M; Perego, M; Santos, L; Gerou-Ferriani, M; Martin, M W S; Santilli, R A

    2016-03-01

    To document the electrocardiographic findings of vagally-induced paroxysmal atrial fibrillation following a presumed reflex syncopal episode in the dog. Seven dogs with a syncopal episode followed by a paroxysm of atrial fibrillation recorded on a 24-hour Holter. Twenty-four hour Holter monitors were retrospectively reviewed, analysing the cardiac rhythm associated with syncopal events. Each recording was analysed from 10 min before the syncopal episode to until 10 min after a normal sinus rhythm had returned. Nine episodes were recorded in seven dogs, with one patient experiencing three events during one Holter recording. Five of the seven dogs presented with underlying structural heart disease. In two the syncopal episodes occurred following exercise, two associated with coughing and three were during a period of rest. All dogs had documented on the Holter recording a rhythm abnormality during syncope. The most common finding leading up to the syncopal event was development of a progressive sinus bradycardia, followed by sinus arrest interrupted by a ventricular escape rhythm and then ventricular arrest. This was then followed by an atrial fibrillation. The atrial fibrillation was paroxysmal in seven recordings and persistent in two. In two dogs, the atrial fibrillation reorganised into self-limiting runs of atypical atrial flutter. This combination of electrocardiographic arrhythmias are probably caused by an inappropriate parasympathetic stimulation initiating a reflex or neurally-mediated syncope, with abnormal automaticity of the sinus node and of the subsidiary pacemaker cells and changes in the electrophysiological properties of the atrial muscle, which promoted the paroxysmal atrial fibrillation. Copyright © 2015 Elsevier B.V. All rights reserved.

  3. Performance of thirteen clinical rules to distinguish bacterial and presumed viral meningitis in Vietnamese children.

    Directory of Open Access Journals (Sweden)

    Nguyen Tien Huy

    Full Text Available BACKGROUND AND PURPOSE: Successful outcomes from bacterial meningitis require rapid antibiotic treatment; however, unnecessary treatment of viral meningitis may lead to increased toxicities and expense. Thus, improved diagnostics are required to maximize treatment and minimize side effects and cost. Thirteen clinical decision rules have been reported to identify bacterial from viral meningitis. However, few rules have been tested and compared in a single study, while several rules are yet to be tested by independent researchers or in pediatric populations. Thus, simultaneous test and comparison of these rules are required to enable clinicians to select an optimal diagnostic rule for bacterial meningitis in settings and populations similar to ours. METHODS: A retrospective cross-sectional study was conducted at the Infectious Department of Pediatric Hospital Number 1, Ho Chi Minh City, Vietnam. The performance of the clinical rules was evaluated by area under a receiver operating characteristic curve (ROC-AUC using the method of DeLong and McNemar test for specificity comparison. RESULTS: Our study included 129 patients, of whom 80 had bacterial meningitis and 49 had presumed viral meningitis. Spanos's rule had the highest AUC at 0.938 but was not significantly greater than other rules. No rule provided 100% sensitivity with a specificity higher than 50%. Based on our calculation of theoretical sensitivity and specificity, we suggest that a perfect rule requires at least four independent variables that posses both sensitivity and specificity higher than 85-90%. CONCLUSIONS: No clinical decision rules provided an acceptable specificity (>50% with 100% sensitivity when applying our data set in children. More studies in Vietnam and developing countries are required to develop and/or validate clinical rules and more very good biomarkers are required to develop such a perfect rule.

  4. Interactive design of probability density functions for shape grammars

    KAUST Repository

    Dang, Minh

    2015-11-02

    A shape grammar defines a procedural shape space containing a variety of models of the same class, e.g. buildings, trees, furniture, airplanes, bikes, etc. We present a framework that enables a user to interactively design a probability density function (pdf) over such a shape space and to sample models according to the designed pdf. First, we propose a user interface that enables a user to quickly provide preference scores for selected shapes and suggest sampling strategies to decide which models to present to the user to evaluate. Second, we propose a novel kernel function to encode the similarity between two procedural models. Third, we propose a framework to interpolate user preference scores by combining multiple techniques: function factorization, Gaussian process regression, autorelevance detection, and l1 regularization. Fourth, we modify the original grammars to generate models with a pdf proportional to the user preference scores. Finally, we provide evaluations of our user interface and framework parameters and a comparison to other exploratory modeling techniques using modeling tasks in five example shape spaces: furniture, low-rise buildings, skyscrapers, airplanes, and vegetation.

  5. 3D shape representation with spatial probabilistic distribution of intrinsic shape keypoints

    Science.gov (United States)

    Ghorpade, Vijaya K.; Checchin, Paul; Malaterre, Laurent; Trassoudaine, Laurent

    2017-12-01

    The accelerated advancement in modeling, digitizing, and visualizing techniques for 3D shapes has led to an increasing amount of 3D models creation and usage, thanks to the 3D sensors which are readily available and easy to utilize. As a result, determining the similarity between 3D shapes has become consequential and is a fundamental task in shape-based recognition, retrieval, clustering, and classification. Several decades of research in Content-Based Information Retrieval (CBIR) has resulted in diverse techniques for 2D and 3D shape or object classification/retrieval and many benchmark data sets. In this article, a novel technique for 3D shape representation and object classification has been proposed based on analyses of spatial, geometric distributions of 3D keypoints. These distributions capture the intrinsic geometric structure of 3D objects. The result of the approach is a probability distribution function (PDF) produced from spatial disposition of 3D keypoints, keypoints which are stable on object surface and invariant to pose changes. Each class/instance of an object can be uniquely represented by a PDF. This shape representation is robust yet with a simple idea, easy to implement but fast enough to compute. Both Euclidean and topological space on object's surface are considered to build the PDFs. Topology-based geodesic distances between keypoints exploit the non-planar surface properties of the object. The performance of the novel shape signature is tested with object classification accuracy. The classification efficacy of the new shape analysis method is evaluated on a new dataset acquired with a Time-of-Flight camera, and also, a comparative evaluation on a standard benchmark dataset with state-of-the-art methods is performed. Experimental results demonstrate superior classification performance of the new approach on RGB-D dataset and depth data.

  6. "Presumed fair: Ironic effects of organizational diversity structures": Correction to Kaiser et al. (2013).

    Science.gov (United States)

    2016-06-01

    Reports an error in "Presumed fair: Ironic effects of organizational diversity structures" by Cheryl R. Kaiser, Brenda Major, Ines Jurcevic, Tessa L. Dover, Laura M. Brady and Jenessa R. Shapiro (Journal of Personality and Social Psychology, 2013[Mar], Vol 104[3], 504-519). In the article, a raw data merging error in one racial discrimination claim condition from Experiment 6 inadvertently resulted in data analyses on an inaccurate data set. When the error was discovered by the authors and corrected, all analyses reported in Experiment 6 for claim validity, seriousness of the claim, and support for the claimant were inaccurate and none were statistically significant. The conclusions should be altered to indicate that participants with management experience who reflected on their own workplace diversity policies did not show the predicted effects. The literature review, remaining five studies, and remaining conclusions in the article are unaffected by this error. Experiment 6 should also report that 26.4% (not 26.4.7%) of participants had a graduate degree and eight participants (not 8%) did not provide educational data. Experiment 5 should have referred to the claim validity measure as a six-item measure ( .92) rather than a five-item measure; analyses on claim validity are accurate in text. Table 2's note should have said standard errors, not standard deviations. (The following abstract of the original article appeared in record 2012-31077-001.) This research tests the hypothesis that the presence (vs. absence) of organizational diversity structures causes high-status group members (Whites, men) to perceive organizations with diversity structures as procedurally fairer environments for underrepresented groups (racial minorities, women), even when it is clear that underrepresented groups have been unfairly disadvantaged within these organizations. Furthermore, this illusory sense of fairness derived from the mere presence of diversity structures causes high

  7. Linear shaped charge

    Energy Technology Data Exchange (ETDEWEB)

    Peterson, David; Stofleth, Jerome H.; Saul, Venner W.

    2017-07-11

    Linear shaped charges are described herein. In a general embodiment, the linear shaped charge has an explosive with an elongated arrowhead-shaped profile. The linear shaped charge also has and an elongated v-shaped liner that is inset into a recess of the explosive. Another linear shaped charge includes an explosive that is shaped as a star-shaped prism. Liners are inset into crevices of the explosive, where the explosive acts as a tamper.

  8. Shape language - How people describe shapes and shape operations

    NARCIS (Netherlands)

    Wiegers, T.; Langeveld, L.H.; Vergeest, J.S.M.

    2001-01-01

    Many designers do not use CAD tools for shape ideation. They consider CAD systems not appropriate for the ideation phase. This research investigates how designers ideate shape, in particular which terms they use to exteriorize shape. The goal is to be able to propose digital tools that are useful

  9. Surgery for stress urinary incontinence due to presumed sphincter deficiency after prostate surgery.

    Science.gov (United States)

    Silva, Laercio A; Andriolo, Régis B; Atallah, Álvaro N; da Silva, Edina M K

    2014-09-27

    Incontinence after prostatectomy for benign or malignant disease is a well-known and often a feared outcome. Although small degrees of incidental incontinence may go virtually unnoticed, larger degrees of incontinence can have a major impact on a man's quality of life.Conceptually, post-prostatectomy incontinence may be caused by sphincter malfunction or bladder dysfunction, or both. Most men with post-prostatectomy incontinence (60% to 100%) have stress urinary incontinence, which is involuntary urinary leakage on effort or exertion, or on sneezing or coughing. This may be due to intrinsic sphincter deficiency and may be treated with surgery for optimal management of incontinence. Detrusor dysfunction is more common after surgery for benign prostatic disease. To determine the effects of surgical treatment for urinary incontinence related to presumed sphincter deficiency after prostate surgery for:- men with lower urinary tract symptoms (LUTS) secondary to benign prostatic hyperplasia (BPH) - transurethral resection of prostate (TURP), photo vaporisation of the prostate, laser enucleation of the prostate or open prostatectomy - and- men with prostate cancer - radical prostatectomy (retropubic, perineal, laparoscopic, or robotic). We searched the Cochrane Incontinence Group Specialised Register, which contains trials identified from Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, MEDLINE in process, ClinicalTrials.gov, and handsearching of journals and conference proceedings (searched 31 March 2014); MEDLINE (January 1966 to April 2014); EMBASE (January 1988 to April 2014); and LILACS (January 1982 to April 2014). We handsearched the reference lists of relevant articles and conference proceedings. We contacted investigators to locate studies. Randomised or quasi-randomised trials that include surgical treatments of urinary incontinence after prostate surgery. Two authors independently screened the trials identified, appraised quality of papers

  10. Examining how presumed media influence affects social norms and adolescents' attitudes and drinking behavior intentions in rural Thailand.

    Science.gov (United States)

    Ho, Shirley S; Poorisat, Thanomwong; Neo, Rachel L; Detenber, Benjamin H

    2014-01-01

    This study uses the influence of presumed media influence model as the theoretical framework to examine how perceived social norms (i.e., descriptive, subjective, and injunctive norms) will mediate the influence of pro- and antidrinking media messages on adolescents' intention to consume alcohol in rural Thailand. Data collected from 1,028 high school students indicate that different mechanisms underlie drinking intentions between nondrinkers and those who have consumed alcohol or currently drink. Among nondrinkers, perceived peer attention to prodrinking messages indirectly influenced adolescents' prodrinking attitudes and intentions to consume alcohol through all three types of perceived social norms. Among drinkers, perceived peer attention to pro- and antidrinking messages indirectly influenced adolescents' prodrinking attitudes and intentions to drink alcohol through perceived subjective norm. The findings provide support for the extended influence of presumed media influence model and have practical implications for how antidrinking campaigns targeted at teenagers in Thailand might be designed.

  11. Isolated third, fourth, and sixth cranial nerve palsies from presumed microvascular versus other causes: a prospective study.

    Science.gov (United States)

    Tamhankar, Madhura A; Biousse, Valerie; Ying, Gui-Shuang; Prasad, Sashank; Subramanian, Prem S; Lee, Michael S; Eggenberger, Eric; Moss, Heather E; Pineles, Stacy; Bennett, Jeffrey; Osborne, Benjamin; Volpe, Nicholas J; Liu, Grant T; Bruce, Beau B; Newman, Nancy J; Galetta, Steven L; Balcer, Laura J

    2013-11-01

    To estimate the proportion of patients presenting with isolated third, fourth, or sixth cranial nerve palsy of presumed microvascular origin versus other causes. Prospective, multicenter, observational case series. A total of 109 patients aged 50 years or older with acute isolated ocular motor nerve palsy. Magnetic resonance imaging (MRI) of the brain. Causes of acute isolated ocular motor nerve palsy (presumed microvascular or other) as determined with early MRI and clinical assessment. Among 109 patients enrolled in the study, 22 had cranial nerve III palsy, 25 had cranial nerve IV palsy, and 62 had cranial nerve VI palsy. A cause other than presumed microvascular ischemia was identified in 18 patients (16.5%; 95% confidence interval, 10.7-24.6). The presence of 1 or more vasculopathic risk factors (diabetes, hypertension, hypercholesterolemia, coronary artery disease, myocardial infarction, stroke, and smoking) was significantly associated with a presumed microvascular cause (P = 0.003, Fisher exact test). Vasculopathic risk factors were also present in 61% of patients (11/18) with other causes. In the group of patients who had vasculopathic risk factors only, with no other significant medical condition, 10% of patients (8/80) were found to have other causes, including midbrain infarction, neoplasms, inflammation, pituitary apoplexy, and giant cell arteritis (GCA). By excluding patients with third cranial nerve palsies and those with GCA, the incidence of other causes for isolated fourth and sixth cranial nerve palsies was 4.7% (3/64). In our series of patients with acute isolated ocular motor nerve palsies, a substantial proportion of patients had other causes, including neoplasm, GCA, and brain stem infarction. Brain MRI and laboratory workup have a role in the initial evaluation of older patients with isolated acute ocular motor nerve palsies regardless of whether vascular risk factors are present. Copyright © 2013 American Academy of Ophthalmology

  12. Clinical pitfalls in misoprostol-based medical management of first-trimester induced and presumed spontaneous abortion.

    Science.gov (United States)

    Wax, Joseph R; Conroy, Kelley; Pinette, Michael G; Litton, Christian; Cartin, Angelina

    2017-12-28

    When administered inappropriately, first-trimester misoprostol management of induced or spontaneous abortion can result in loss or damage of a continuing pregnancy. Despite these serious consequences, such misoprostol exposures continue to occur. Unfortunately, contributing factors and preventive measures receive little attention. We describe the cases of 4 women in whom misoprostol was inappropriately administered during management of induced and presumed spontaneous abortion. In each case, careful adherence to published clinical guidance could have avoided the exposures. © 2017 Wiley Periodicals, Inc.

  13. A macroscopic model for magnetic shape-memory single crystals

    Czech Academy of Sciences Publication Activity Database

    Bessoud, A. L.; Kružík, Martin; Stefanelli, U.

    2013-01-01

    Roč. 64, č. 2 (2013), s. 343-359 ISSN 0044-2275 R&D Projects: GA AV ČR IAA100750802; GA ČR GAP201/10/0357 Institutional support: RVO:67985556 Keywords : magneto striction * evolution Subject RIV: BA - General Mathematics Impact factor: 1.214, year: 2013 http://library.utia.cas.cz/separaty/2012/MTR/kruzik-a macroscopic model for magnetic shape-memory single crystals.pdf

  14. Digitized Historical Geomagnetic Publications in PDF format

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — A catalog of 732 historical geomagnetic publications that were at risk of loss have been digitized and converted in pdf documents.

  15. Doppler spectral line shapes in low frequency turbulent plasmas

    International Nuclear Information System (INIS)

    Marandet, Y.; Godbert-Mouret, L.; Koubiti, M.; Stamm, R.; Capes, H.; Guirlet, R.

    2003-01-01

    In this paper we investigate the influence of low frequency, i.e. drift wave like turbulence on the spectral line shapes in magnetized plasmas. The measured spectrum, which is obtained through both spatial and time averaging processes, is shown to contain information on turbulence. Using a statistical description of the turbulent fluctuations, we investigate the effects of density, fluid velocity and temperature fluctuations on the Doppler profile of a spectral line. The model we built, relies on 2 separations of scales, first between the atomic processes and the turbulence, allowing the use of a simple LTE model for the VDF (velocity distribution function) of the emitters. Then between turbulent scales and the measurement scales, allowing a statistical treatment of the turbulent fluctuations. The relevant quantity pertaining to turbulence for line shape calculations is found to be the joint PDF (probability distribution function) of the fluctuating plasma parameters. Using our model, we were able to investigate the limiting cases where only one variable fluctuates. At this level of approximation, the Doppler line does not contain information on the density fluctuations. A non-Gaussian PDF leads to a profile which is also non-Gaussian. Thus information on this PDF might be obtained from the measured line shape

  16. Shape memory polymers

    Science.gov (United States)

    Wilson, Thomas S.; Bearinger, Jane P.

    2015-06-09

    New shape memory polymer compositions, methods for synthesizing new shape memory polymers, and apparatus comprising an actuator and a shape memory polymer wherein the shape memory polymer comprises at least a portion of the actuator. A shape memory polymer comprising a polymer composition which physically forms a network structure wherein the polymer composition has shape-memory behavior and can be formed into a permanent primary shape, re-formed into a stable secondary shape, and controllably actuated to recover the permanent primary shape. Polymers have optimal aliphatic network structures due to minimization of dangling chains by using monomers that are symmetrical and that have matching amine and hydroxyl groups providing polymers and polymer foams with clarity, tight (narrow temperature range) single transitions, and high shape recovery and recovery force that are especially useful for implanting in the human body.

  17. Sequence diversities of serine-aspartate repeat genes among Staphylococcus aureus isolates from different hosts presumably by horizontal gene transfer.

    Directory of Open Access Journals (Sweden)

    Huping Xue

    Full Text Available BACKGROUND: Horizontal gene transfer (HGT is recognized as one of the major forces for bacterial genome evolution. Many clinically important bacteria may acquire virulence factors and antibiotic resistance through HGT. The comparative genomic analysis has become an important tool for identifying HGT in emerging pathogens. In this study, the Serine-Aspartate Repeat (Sdr family has been compared among different sources of Staphylococcus aureus (S. aureus to discover sequence diversities within their genomes. METHODOLOGY/PRINCIPAL FINDINGS: Four sdr genes were analyzed for 21 different S. aureus strains and 218 mastitis-associated S. aureus isolates from Canada. Comparative genomic analyses revealed that S. aureus strains from bovine mastitis (RF122 and mastitis isolates in this study, ovine mastitis (ED133, pig (ST398, chicken (ED98, and human methicillin-resistant S. aureus (MRSA (TCH130, MRSA252, Mu3, Mu50, N315, 04-02981, JH1 and JH9 were highly associated with one another, presumably due to HGT. In addition, several types of insertion and deletion were found in sdr genes of many isolates. A new insertion sequence was found in mastitis isolates, which was presumably responsible for the HGT of sdrC gene among different strains. Moreover, the sdr genes could be used to type S. aureus. Regional difference of sdr genes distribution was also indicated among the tested S. aureus isolates. Finally, certain associations were found between sdr genes and subclinical or clinical mastitis isolates. CONCLUSIONS: Certain sdr gene sequences were shared in S. aureus strains and isolates from different species presumably due to HGT. Our results also suggest that the distributional assay of virulence factors should detect the full sequences or full functional regions of these factors. The traditional assay using short conserved regions may not be accurate or credible. These findings have important implications with regard to animal husbandry practices that may

  18. e73.pdf.pdf | 92 | OnlineResources | jgenet | www.ias.ac.in | http ...

    Indian Academy of Sciences (India)

    Home; public; Volumes; jgen; 092; online; http; www.ias.ac.in; jgenet; OnlineResources; 92; e73.pdf.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 ...

  19. Experimental Measurement of the Density Fluctuation PDF for small Atwood, high Schmidt number, Rayleigh-Taylor mixing

    Science.gov (United States)

    Duggleby, Andrew; Doron, Yuval; Andrews, Malcolm

    2008-11-01

    The experimental measurement of the probability density function (pdf) of density fluctuations in a Rayleigh-Taylor small Atwood water channel facility with high Schmidt number is reported. In the experiments, molecular mixing is measured by a phenolphthalein chemical indicator that reacts, turning from transparent to pink, when the heavy (salty & acidic) and light (fresh & alkali) water streams mix together. The degree of molecular mixing is determined from the relationship between amount of the chemical reaction formed and the density variance ρ'^2. By measuring the concentration of the reaction product by backlit optical technique for various initial pH differentials, a detailed pdf of the density fluctuation has been obtained. The shape of the density fluctuation pdf as well as future research will be discussed.

  20. Clinical impact of a commercially available multiplex PCR system for rapid detection of pathogens in patients with presumed sepsis

    Directory of Open Access Journals (Sweden)

    Linde Hans-Jörg

    2009-08-01

    Full Text Available Abstract Background Timely identification of pathogens is crucial to minimize mortality in patients with severe infections. Detection of bacterial and fungal pathogens in blood by nucleic acid amplification promises to yield results faster than blood cultures (BC. We analyzed the clinical impact of a commercially available multiplex PCR system in patients with suspected sepsis. Methods Blood samples from patients with presumed sepsis were cultured with the Bactec 9240™ system (Becton Dickinson, Heidelberg, Germany and aliquots subjected to analysis with the LightCycler® SeptiFast® (SF Test (Roche Diagnostics, Mannheim, Germany at a tertiary care centre. For samples with PCR-detected pathogens, the actual impact on clinical management was determined by chart review. Furthermore a comparison between the time to a positive blood culture result and the SF result, based on a fictive assumption that it was done either on a once or twice daily basis, was made. Results Of 101 blood samples from 77 patients, 63 (62% yielded concordant negative results, 14 (13% concordant positive and 9 (9% were BC positive only. In 14 (13% samples pathogens were detected by SF only, resulting in adjustment of antibiotic therapy in 5 patients (7,7% of patients. In 3 samples a treatment adjustment would have been made earlier resulting in a total of 8 adjustments in all 101 samples (8%. Conclusion The addition of multiplex PCR to conventional blood cultures had a relevant impact on clinical management for a subset of patients with presumed sepsis.

  1. A Study Regarding Attitudes Ofyoung Slum Dwelling Females Towards Their Husband/Sex Partner Presuming Them Hiv Infected

    Directory of Open Access Journals (Sweden)

    Monica Shukla

    2004-06-01

    Full Text Available Research Question : What is the attitude of young females towards their husband or sex partners presuming them infected with HIV?Objectives : Attitude of young slum dwelling females towards husband or sex partner presuming them HIV infectedaccording to age of respondentsaccording to marital status of respondentsaccording to occupation of respondentsaccording to literacy status of respondents Study Design : Cross sectional studyStudy Area : 10% of the Slums of Kanpur City having population less than 3000.Participants : 13 to 25 years aged females of selected slums.Study variables : Age, marital status, occur' ,:on, literacy status.Statistical Analysis : PercentageResults : 12.3% expressed about non disclosure of disease. 25.7% were indecisive, 65.2% to pursue for treatment, 32.7% to continue sex relationship and 31.2% to continue social relationship. Respondents employed as teachers showed greater degree of concern for more care (45.5% and also for continuation of social and sexual relationship. Continuation on social & sexual relationship along with pursuation for treatment and more care of victim (husband/sex partner was observed among highest percentage in graduate and above level with gradual decrease in the prevalence with decrease in the level of education.

  2. Do we need to change the legislation to a system of presumed consent to address organ shortage?

    Science.gov (United States)

    Simillis, Constantinos

    2010-04-01

    Organ transplantation significantly improves the health, quality of life and life-expectancy of people whose organs have failed. Most patients in the UK cannot enjoy the benefits of a transplant because of an extreme shortage of organs. This paper demonstrates the magnitude of the problem of organ shortage and identifies possible causes. The current UK legislation regarding consent to organ transplantation is analysed and compared with other jurisdictions. The hypothesis of changing the legislation to a system of presumed consent in order to address the organ shortage is explored. The main issues surrounding a change in the legislation are considered, and the effects on society and the individual are discussed. This paper argues that there is not enough convincing evidence to support a change in the legislation to a system of presumed consent at this time. Instead, an increase in organ donations could be achieved by improving the effectiveness of the current system of organ donation, and by improving the public's awareness and understanding of organ transplantation issues.

  3. Presumed idiopathic outer lamellar defects of the fovea and chronic solar retinopathy: an OCT and fundus autofluorescence study.

    Science.gov (United States)

    dell'Omo, R; Konstantopoulou, K; Wong, R; Pavesio, C

    2009-11-01

    To examine fundus autofluorescence (FAF) findings in eyes with presumed idiopathic outer lamellar defects (OLD) at the fovea and to discuss their pathogenesis. Prospective observational case series of five eyes of four patients presenting with OLD at the fovea defined as discrete lesions of 50-100 mum in size located at the level of the outer retina on biomicroscopy and imaged on optical coherence tomography (OCT) as cylindrical, well-demarcated interruption of hyper-reflective bands corresponding to the inner/outer segments junction of photoreceptors and to the complex retinal pigment epithelium-choriocapillaris; none of the enrolled patients had any positive history for direct sungazing, welding-arc or sunbed exposure, whiplash injury, ocular trauma, macular oedema/detachment or evidence of vitreomacular traction. The corresponding FAF images were evaluated. In eyes with OLD, the neuroretina in the foveal region appeared to be thinner than in fellow, unaffected eyes. FAF revealed well-demarcated, hypoautofluorescent areas (corresponding in location to the OLD observed clinically and on OCT), surrounded by an irregular halo of relatively increased autofluorescence in the context of the greater hypoautofluorescent macular region. Biomicroscopy, OCT and FAF findings of presumed idiopathic OLD of the fovea strongly resemble those observed in association with chronic solar retinopathy. In association with OCT, FAF might represent a useful technique with which to detect subtle solar-induced injuries of the retina.

  4. Evidence of acute rickettsioses among patients presumed to have chikungunya fever during the chikungunya outbreak in Sri Lanka.

    Science.gov (United States)

    Premaratna, R; Halambarachchige, L P; Nanayakkara, D M; Chandrasena, T G A N; Rajapakse, R P V J; Bandara, N K B K R G W; de Silva, H J

    2011-12-01

    Chikungunya fever (CGF) and rickettsioses are known to cause acute onset febrile illnesses associated with severe arthritis. Rickettsial arthritis is curable with the use of appropriate anti-rickettsial antibiotics, however the arthritis of CGF tends to have a prolonged course leading to protracted disability. The aim of this study was to investigate the contribution of CGF and rickettsioses to cases of fever and arthritis during a presumed CGF outbreak in Sri Lanka. Fifty-eight consecutive patients with presumed CGF were further investigated to determine the occurrence of rickettsioses among them, and to identify differences in clinical, hematological, and biochemical parameters between the two diseases. Nearly a third of the patients had serological evidence of rickettsioses accounting for their illness. The presence of a late onset major joint arthropathy sparing the small joints of the hands and feet, and the occurrence of a late onset discrete maculopapular rash over the trunk and extremities, suggested rickettsioses over CGF. White blood cell count, erythrocyte sedimentation rate, C-reactive protein, and liver function tests were not helpful in differentiating rickettsioses from CGF. Patients with rickettsioses and arthritis who received an empirical course of doxycycline recovered faster than those who did not receive specific treatment. The establishment of rapid diagnostic methods able to differentiate the etiological agents of fever and arthritis, such as CGF and rickettsioses, would be beneficial in endemic settings. Copyright © 2011 International Society for Infectious Diseases. Published by Elsevier Ltd. All rights reserved.

  5. Probability density function shape sensitivity in the statistical modeling of turbulent particle dispersion

    Science.gov (United States)

    Litchford, Ron J.; Jeng, San-Mou

    1992-01-01

    The performance of a recently introduced statistical transport model for turbulent particle dispersion is studied here for rigid particles injected into a round turbulent jet. Both uniform and isosceles triangle pdfs are used. The statistical sensitivity to parcel pdf shape is demonstrated.

  6. Shape-changing interfaces:

    DEFF Research Database (Denmark)

    Rasmussen, Majken Kirkegård; Pedersen, Esben Warming; Petersen, Marianne Graves

    2015-01-01

    Shape change is increasingly used in physical user interfaces, both as input and output. Yet, the progress made and the key research questions for shape-changing interfaces are rarely analyzed systematically. We review a sample of existing work on shape-changing interfaces to address these shortc......Shape change is increasingly used in physical user interfaces, both as input and output. Yet, the progress made and the key research questions for shape-changing interfaces are rarely analyzed systematically. We review a sample of existing work on shape-changing interfaces to address...... shape-changing interfaces be used for, (b) which parts of the design space are not well understood, and (c) why studying user experience with shape-changing interfaces is important....

  7. Self-erecting shapes

    Science.gov (United States)

    Reading, Matthew W.

    2017-07-04

    Technologies for making self-erecting structures are described herein. An exemplary self-erecting structure comprises a plurality of shape-memory members that connect two or more hub components. When forces are applied to the self-erecting structure, the shape-memory members can deform, and when the forces are removed the shape-memory members can return to their original pre-deformation shape, allowing the self-erecting structure to return to its own original shape under its own power. A shape of the self-erecting structure depends on a spatial orientation of the hub components, and a relative orientation of the shape-memory members, which in turn depends on an orientation of joining of the shape-memory members with the hub components.

  8. Next-Generation Sequencing Confirms Presumed Nosocomial Transmission of Livestock-Associated Methicillin-Resistant Staphylococcus aureus in the Netherlands.

    Science.gov (United States)

    Bosch, Thijs; Witteveen, Sandra; Haenen, Anja; Landman, Fabian; Schouls, Leo M

    2016-07-15

    Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) was detected in 2003 and rapidly became the predominant MRSA clade in the Netherlands. Studies have shown that transmissions are difficult to identify, since this MRSA variant represents a genetically homogenous clade when current typing techniques are used. Here, next-generation sequencing was performed on 206 LA-MRSA isolates to assess the capability of LA-MRSA to be transmitted between humans. The usefulness of single nucleotide variants (SNVs), the composition of the SCCmec region, and the presence of plasmids to identify transmission of LA-MRSA were assessed. In total, 30 presumed putative nosocomial transmission events and 2 LA-MRSA outbreaks were studied; in most cases, SNV analysis revealed that the isolates of the index patient and the contact(s) clustered closely together. In three presumed events, the isolates did not cluster together, indicating that transmission was unlikely. The composition of the SCCmec region corroborated these findings. However, plasmid identification did not support our SNV analysis, since different plasmids were present in several cases where SNV and SCCmec analysis suggested that transmission was likely. Next-generation sequencing shows that transmission of LA-MRSA does occur in Dutch health care settings. Transmission was identified based on SNV analysis combined with epidemiological data and in the context of epidemiologically related and unrelated isolates. Analysis of the SCCmec region provided limited, albeit useful, information to corroborate conclusions on transmissions, but plasmid identification did not. In 2003, a variant of methicillin-resistant Staphylococcus aureus (MRSA) isolated from pigs was also found in pig farmers in France and the Netherlands. Soon thereafter, this livestock-associated MRSA (LA-MRSA) was identified in many other countries. Transmission of LA-MRSA between humans, particularly in the health care setting, is regarded to

  9. presumed choloroquine retinopathy

    African Journals Online (AJOL)

    A follow up national survey would be desirable to determine the actual magnitude of the problem. Key words: blindness chloroquine, retinopathy, irreversible ... the treatment of lupus erythematosus and rheumatoid arthritis. The effective doses commonly used exceed that used in treating malaria, as the drug is administered.

  10. Three-dimensional reconstructions come to life--interactive 3D PDF animations in functional morphology.

    Directory of Open Access Journals (Sweden)

    Thomas van de Kamp

    Full Text Available Digital surface mesh models based on segmented datasets have become an integral part of studies on animal anatomy and functional morphology; usually, they are published as static images, movies or as interactive PDF files. We demonstrate the use of animated 3D models embedded in PDF documents, which combine the advantages of both movie and interactivity, based on the example of preserved Trigonopterus weevils. The method is particularly suitable to simulate joints with largely deterministic movements due to precise form closure. We illustrate the function of an individual screw-and-nut type hip joint and proceed to the complex movements of the entire insect attaining a defence position. This posture is achieved by a specific cascade of movements: Head and legs interlock mutually and with specific features of thorax and the first abdominal ventrite, presumably to increase the mechanical stability of the beetle and to maintain the defence position with minimal muscle activity. The deterministic interaction of accurately fitting body parts follows a defined sequence, which resembles a piece of engineering.

  11. The Hue of Shapes

    Science.gov (United States)

    Albertazzi, Liliana; Da Pos, Osvaldo; Canal, Luisa; Micciolo, Rocco; Malfatti, Michela; Vescovi, Massimo

    2013-01-01

    This article presents an experimental study on the naturally biased association between shape and color. For each basic geometric shape studied, participants were asked to indicate the color perceived as most closely related to it, choosing from the Natural Color System Hue Circle. Results show that the choices of color for each shape were not…

  12. Building with shapes

    CERN Document Server

    Mooney, Carla

    2014-01-01

    There are shapes everywhere you look. You can put shapes together or build with them. What can you build with three circles? In this title, students will explore and understand that certain attributes define what a shape is called. This title will allow students to identify the main purpose of a text, including what the author wants to answer, explain, or describe.

  13. IT Department User Survey PDF Usage Report

    CERN Document Server

    Jones, Pete

    2017-01-01

    During 2016 the IT-CDA group carried out a study of IT users and their working environments and habits with the aim of understanding the user community better. This project involved interviews with users from different working backgrounds and an online survey containing questions of user devices and software preferences. A section of the questions was aimed at understanding how people handle PDF documents and this note analyses the responses to these. This analysis will help IT-CDA to better understand the PDF requirements and so help us to improve the services that rely on these documents.

  14. Clinical characteristics and outcomes of patients admitted with presumed microbial keratitis to a tertiary medical center in Israel

    Directory of Open Access Journals (Sweden)

    Fabio Lavinsky

    2013-06-01

    Full Text Available PURPOSES: Microbial keratitis is commonly diagnosed worldwide, and continues to cause significant ocular morbidity, requiring prompt and appropriate treatment. The objective of this study is to describe the clinical characteristics and outcomes of patients with presumed microbial keratitis admitted to The Goldschleger Eye Institute, Sheba Medical Center, Tel Aviv University, Tel Hashomer, Israel. METHODS: A cross-sectional study was conducted, in which the medical records of patients with presumed microbial keratitis admitted during a period of 3 years were reviewed. RESULTS: Keratitis was diagnosed in 276 patients (51% males and 48.9% females. The mean age was 39.29 ± 22.30 years. The hospital length of stay ranged from 1 to 65 days (mean 5.69 ± 5.508. Fortified antibiotics were still used at discharge in 72% of the cases. Overall visual acuity improved significantly from the time of admission to the 1st-week follow up visit showing a p0.05. The degree of hypopyon and cells in the anterior chamber was significantly related to the hospital length of stay (r Spearman=0.31; p<0.001 and r Spearman=0.21; p<.001, respectively as well as to a worse visual outcome (r Spearman=0.32; p<0.01 and r Spearman=0.18; p=0.01, respectively. Of all patients, 2.3% required an urgent therapeutic penetrating keratoplasty, and 1% underwent evisceration. There was no enucleation. CONCLUSION: Treating keratitis aggressively and assuring patient compliance is imperative for a good final visual outcome. Inpatient treatment may have a positive impact on this outcome.

  15. Transverse comparisons between ultrasound and radionuclide parameters in children with presumed antenatally detected pelvi-ureteric junction obstruction

    Energy Technology Data Exchange (ETDEWEB)

    Duong, Hong Phuoc; Janssen, Francoise; Hall, Michelle; Ismaili, Khalid [Universite Libre de Bruxelles (ULB), Department of Pediatric Nephrology, Hopital Universitaire des Enfants Reine Fabiola, Brussels (Belgium); Piepsz, Amy [Hopital Universitaire Saint-Pierre, Department of Radioisotopes, Ghent (Belgium); Khelif, Karim; Collier, Frank [Universite Libre de Bruxelles (ULB), Department of Pediatric Urology, Hopital Universitaire des Enfants Reine Fabiola, Brussel (Belgium); Man, Kathia de [University Hospital Ghent, Department of Nuclear Medicine, Ghent (Belgium); Damry, Nash [Universite Libre de Bruxelles (ULB), Department of Pediatric Radiology, Hopital Universitaire des Enfants Reine Fabiola, Brussel (Belgium)

    2015-05-01

    The main criteria used for deciding on surgery in children with presumed antenatally detected pelviureteric junction obstruction (PPUJO) are the level of hydronephrosis (ultrasonography), the level of differential renal function (DRF) and the quality of renal drainage after a furosemide challenge (renography), the importance of each factor being far from generally agreed. Can we predict, on the basis of ultrasound parameters, the patient in whom radionuclide renography can be avoided? We retrospectively analysed the medical charts of 81 consecutive children with presumed unilateral PPUJO detected antenatally. Ultrasound and renographic studies performed at the same time were compared. Anteroposterior pelvic diameter (APD) and calyceal size were both divided into three levels of dilatation. Parenchymal thickness was considered either normal or significantly decreased. Acquisition of renograms under furosemide stimulation provided quantification of DRF, quality of renal drainage and cortical transit. The percentages of patients with low DRF and poor drainage were significantly higher among those with major hydronephrosis, severe calyceal dilatation or parenchymal thinning. Moreover, impaired cortical transit, which is a major risk factor for functional decline, was seen more frequently among those with very severe calyceal dilatation. However, none of the structural parameters obtained by ultrasound examination was able to predict whether the level of renal function or the quality of drainage was normal or abnormal. Alternatively, an APD <30 mm, a calyceal dilatation of <10 mm and a normal parenchymal thickness were associated with a low probability of decreased renal function or poor renal drainage. In the management strategy of patients with prenatally detected PPUJO, nuclear medicine examinations may be postponed in those with an APD <30 mm, a calyceal dilatation of <10 mm and a normal parenchymal thickness. On the contrary, precise estimation of DRF and renal

  16. RADIOGRAPHIC APPEARANCE OF PRESUMED NONCARDIOGENIC PULMONARY EDEMA AND CORRELATION WITH THE UNDERLYING CAUSE IN DOGS AND CATS.

    Science.gov (United States)

    Bouyssou, Sarah; Specchi, Swan; Desquilbet, Loïc; Pey, Pascaline

    2017-05-01

    Noncardiogenic pulmonary edema is an important cause of respiratory disease in dogs and cats but few reports describe its radiographic appearance. The purpose of this retrospective case series study was to describe radiographic findings in a large cohort of dogs and cats with presumed noncardiogenic pulmonary edema and to test associations among radiographic findings versus cause of edema. Medical records were retrieved for dogs and cats with presumed noncardiogenic edema based on history, radiographic findings, and outcome. Radiographs were reviewed to assess lung pattern and distribution of the edema. Correlation with the cause of noncardiogenic pulmonary edema was evaluated with a Fisher's exact test. A total of 49 dogs and 11 cats were included. Causes for the noncardiogenic edema were airway obstruction (n = 23), direct pulmonary injury (n = 13), severe neurologic stimulation (n = 12), systemic disease (n = 6), near-drowning (n = 3), anaphylaxis (n = 2) and blood transfusion (n = 1). Mixed, symmetric, peripheral, multifocal, bilateral, and dorsal lung patterns were observed in 44 (73.3%), 46 (76.7%), 55 (91.7%), 46 (76.7%), 46 (76.7%), and 34 (57.6%) of 60 animals, respectively. When the distribution was unilateral, pulmonary infiltration involved mainly the right lung lobes (12 of 14, 85.7%). Increased pulmonary opacity was more often asymmetric, unilateral, and dorsal for postobstructive pulmonary edema compared to other types of noncardiogenic pulmonary edema, but no other significant correlations could be identified. In conclusion, noncardiogenic pulmonary edema may present with a quite variable radiographic appearance in dogs and cats. © 2016 American College of Veterinary Radiology.

  17. Alpha Shapes and Proteins

    DEFF Research Database (Denmark)

    Winter, Pawel; Sterner, Henrik; Sterner, Peter

    2009-01-01

    We provide a unified description of (weighted) alpha shapes, beta shapes and the corresponding simplicialcomplexes. We discuss their applicability to various protein-related problems. We also discuss filtrations of alpha shapes and touch upon related persistence issues.We claim that the full...... potential of alpha-shapes and related geometrical constructs in protein-related problems yet remains to be realized and verified. We suggest parallel algorithms for (weighted) alpha shapes, and we argue that future use of filtrations and kinetic variants for larger proteins will need such implementation....

  18. Transforming shape in design

    DEFF Research Database (Denmark)

    Prats, Miquel; Lim, Sungwoo; Jowers, Iestyn

    2009-01-01

    This paper is concerned with how design shapes are generated and explored by means of sketching. It presents research into the way designers transform shapes from one state to another using sketch representations. An experimental investigation of the sketching processes of designers is presented...... phenomenon of ‘subshape' and suggests that a computational mechanism for detecting sub-shapes in design sketches might augment explorative sketching by providing important opportunities for manipulating and generating shape in design........ Connections between sketches are defined in terms of shape transformations and described according to shape rules. These rules provide a formal description of the shape exploration process and develop understanding of the mechanics of sketching in design. The paper concludes by discussing the important...

  19. 621.pdf | Pdf2006Oct | sadha-na | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; sadha-na; Pdf2006Oct; 621.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be ...

  20. e73.pdf.pdf | 92 | OnlineResources | jgenet | www.ias.ac.in | http ...

    Indian Academy of Sciences (India)

    Home; public; Volumes; jgen; 092; online; http; www.ias.ac.in; jgenet; OnlineResources; 92; e73.pdf.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 ...

  1. Shape memory alloys

    International Nuclear Information System (INIS)

    Kaszuwara, W.

    2004-01-01

    Shape memory alloys (SMA), when deformed, have the ability of returning, in certain circumstances, to their initial shape. Deformations related to this phenomenon are for polycrystals 1-8% and up to 15% for monocrystals. The deformation energy is in the range of 10 6 - 10 7 J/m 3 . The deformation is caused by martensitic transformation in the material. Shape memory alloys exhibit one directional or two directional shape memory effect as well as pseudoelastic effect. Shape change is activated by temperature change, which limits working frequency of SMA to 10 2 Hz. Other group of alloys exhibit magnetic shape memory effect. In these alloys martensitic transformation is triggered by magnetic field, thus their working frequency can be higher. Composites containing shape memory alloys can also be used as shape memory materials (applied in vibration damping devices). Another group of composite materials is called heterostructures, in which SMA alloys are incorporated in a form of thin layers The heterostructures can be used as microactuators in microelectromechanical systems (MEMS). Basic SMA comprise: Ni-Ti, Cu (Cu-Zn,Cu-Al, Cu-Sn) and Fe (Fe-Mn, Fe-Cr-Ni) alloys. Shape memory alloys find applications in such areas: automatics, safety and medical devices and many domestic appliances. Currently the most important appears to be research on magnetic shape memory materials and high temperature SMA. Vital from application point of view are composite materials especially those containing several intelligent materials. (author)

  2. Perspectives in shape analysis

    CERN Document Server

    Bruckstein, Alfred; Maragos, Petros; Wuhrer, Stefanie

    2016-01-01

    This book presents recent advances in the field of shape analysis. Written by experts in the fields of continuous-scale shape analysis, discrete shape analysis and sparsity, and numerical computing who hail from different communities, it provides a unique view of the topic from a broad range of perspectives. Over the last decade, it has become increasingly affordable to digitize shape information at high resolution. Yet analyzing and processing this data remains challenging because of the large amount of data involved, and because modern applications such as human-computer interaction require real-time processing. Meeting these challenges requires interdisciplinary approaches that combine concepts from a variety of research areas, including numerical computing, differential geometry, deformable shape modeling, sparse data representation, and machine learning. On the algorithmic side, many shape analysis tasks are modeled using partial differential equations, which can be solved using tools from the field of n...

  3. Magma-plumbing System of Asama Volcano after 2004 Eruption, Estimated from Vertical Deformation above the Presumed Pressure Sources

    Science.gov (United States)

    Kimata, F.

    2012-12-01

    Asama volcano is one of the active volcanoes in Japan, and it erupted on September 1, 2004. A shallow dike intrusion is estimated in the Takamine, 4 - 5 km west of the Asama crater from the ground deformation detected by GPS measurements (Aoki et al., 2005). Ground deformation observation close to the pressure source should clarify the depth and volume change of pressure sources. We establish the precise leveling routes ranging to Mt. Takamine above the presumed pressure source from Oiwake, at the southern foot of Asama volcano in May 2005.The precise levelings have practiced seven times for five years since May 2005 to June 2011. We calculated the vertical deformation for six-months or two-years between leveling epochs. Generally, deformations detected by the precise leveling are small of 10 mm. Deformations detected in the periods of May 2005 - Nov.2005. - May 2006 - May 2009 - June 2010 - June 2011, are grouping two patterns. One is definite subsidence, and another is slight uplift. Murakami (2005) discusses the line length changes between two GPS sites of Tsumagoi and Tobu, and he shows that the extension of line length just before the eruption in 2004 and 2009 and contraction between the eruption. Slight uplifts in the periods of May 2005 - May 2006 are corresponding to the period observed the extension, and subsidence in the periods of May 2006 - May 2007, May 2009 - June 2010, and June 2010 - June 2011. Two pressures sources are estimated from the ground deformation detected by precise leveling. One is a deeper spherical deflation source in the 6 km BSL depth beneath the mountainside, and another is the shallow dike intrusion beneath Mt. Takamine. A pressure source model was previously estimated from the leveling data for last 100 years (Murase et al., 2007), and it is suggestive a dominant source of the Asama volcano. They suggest a slight inflation after 1960, however our results show the deflation of -6.6 km3/6yr in the deeper sources for five years after

  4. Shaping of planetary nebulae

    International Nuclear Information System (INIS)

    Balick, B.

    1987-01-01

    The phases of stellar evolution and the development of planetary nebulae are examined. The relation between planetary nebulae and red giants is studied. Spherical and nonspherical cases of shaping planetaries with stellar winds are described. CCD images of nebulae are analyzed, and it is determined that the shape of planetary nebulae depends on ionization levels. Consideration is given to calculating the distances of planetaries using radio images, and molecular hydrogen envelopes which support the wind-shaping model of planetary nebulae

  5. The effect of vertical velocity probability distribution shape on cloud activation of aerosols: off-line calculations

    Science.gov (United States)

    Tonttila, J.; Romakkaniemi, S.; Räisänen, P.; Kokkola, H.; Järvinen, H.

    2012-04-01

    Off-line calculations of cloud activation of aerosols using a probability density function (PDF) for vertical velocity (w) are performed. The focus is on the variation of the shape of the PDF using two functional formulations: the Normal distribution PDF and the Pearson type IV PDF. The Normal distribution provides a familiar example, as it has been widely used to approximate vertical velocity distributions in numerous applications, including climate models. Pearson type IV distribution provides an alternative that, to our knowledge, has not been employed before to describe the vertical velocity PDF. The advantage of the Pearson distribution is its versatility in representing skewed and more peaked distribution shapes compared to the Normal distribution, though this is obtained at the expense of increased mathematical complexity. The experiments are performed using a box model, in which the environmental conditions, including the aerosol size distribution (bi-modal) and chemical composition (ammonium-sulphate particles) are prescribed as constants. Measured size distributions comprising clean and polluted cases are used. Cloud activation of aerosols is calculated by integrating over the positive side of the PDF of w, which yields the mean number of activated particles (Nact). The mean, variance, and skewness of the PDFs along with the type of the PDF itself are altered in order to explore the effect of the PDF shape on the activation process. All experiments are repeated for three well-documented activation parameterizations: Lin & Leaitch, Abdul-Razzak & Ghan and Fountoukis & Nenes. The results show that for symmetric distributions of w (skewness = 0) there is a maximum difference of 10-15 % in Nact between the cases with w given by the Normal distribution, and the more peaked Pearson distribution. The largest differences are seen for the most polluted cases. Nact in clean cases will saturate rather quickly with respect to the maximum supersaturation and, hence

  6. The transplantable organ shortage in Singapore: has implementation of presumed consent to organ donation made a difference?

    Science.gov (United States)

    Kwek, Tong Kiat; Lew, Thomas W K; Tan, Hui Ling; Kong, Sally

    2009-04-01

    The success of solid organ transplantation in the treatment of end-stage organ failure has fuelled a growing demand for transplantable organs worldwide that has far outstripped the supply from brain dead heart-beating donors. In Singapore, this has resulted in long waiting lists of patients for transplantable organs, especially kidneys. The Human Organ Transplant Act, introduced in 1987, is an opt-out scheme that presumes consent to removal of certain organs for transplantation upon death. Despite this legislation, the number of deceased organ donors in Singapore, at 7 to 9 per million population per year, remains low compared to many other developed countries. In this paper, we reviewed the clinical challenges and ethical dilemmas encountered in managing and identifying potential donors in the neurological intensive care unit (ICU) of a major general hospital in Singapore. The large variance in donor actualisation rates among local restructured hospitals, at 0% to 56.6% (median 8.8%), suggests that considerable room still exists for improvement. To address this, local hospitals need to review their processes and adopt changes and best practices that will ensure earlier identification of potential donors, avoid undue delays in diagnosing brain death, and provide optimal care of multi-organ donors to reduce donor loss from medical failures.

  7. Presumed prevalence analysis on suspected and highly suspected breast cancer lesions in São Paulo using BIRADS criteria.

    Science.gov (United States)

    Milani, Vivian; Goldman, Suzan Menasce; Finguerman, Flora; Pinotti, Marianne; Ribeiro, Celso Scazufka; Abdalla, Nitamar; Szejnfeld, Jacob

    2007-07-05

    Breast cancer screening programs are critical for early detection of breast cancer. Early detection is essential for diagnosing, treating and possibly curing breast cancer. Since there are no data on the incidence of breast cancer, nationally or regionally in Brazil, our aim was to assess women by means of mammography, to determine the prevalence of this disease. The study protocol was designed in collaboration between the Department of Diagnostic Imaging (DDI), Institute of Diagnostic Imaging (IDI) and São Paulo Municipal Health Program. A total of 139,945 Brazilian women were assessed by means of mammography between April 2002 and September 2004. Using the American College of Radiology (ACR) criteria (Breast Imaging Reporting and Data System, BIRADS), the prevalence of suspected and highly suspected breast lesions were determined. The prevalence of suspected (BIRADS 4) and highly suspected (BIRADS 5) lesions increased with age, especially after the fourth decade. Accordingly, BIRADS 4 and BIRADS 5 lesions were more prevalent in the fourth, fifth, sixth and seventh decades. The presumed prevalence of suspected and highly suspected breast cancer lesions in the population of São Paulo was 0.6% and it is similar to the prevalence of breast cancer observed in other populations.

  8. Presumed prevalence analysis on suspected and highly suspected breast cancer lesions in São Paulo using BIRADS® criteria

    Directory of Open Access Journals (Sweden)

    Vivian Milani

    Full Text Available CONTEXT AND OBJECTIVE: Breast cancer screening programs are critical for early detection of breast cancer. Early detection is essential for diagnosing, treating and possibly curing breast cancer. Since there are no data on the incidence of breast cancer, nationally or regionally in Brazil, our aim was to assess women by means of mammography, to determine the prevalence of this disease. DESIGN AND SETTING: The study protocol was designed in collaboration between the Department of Diagnostic Imaging (DDI, Institute of Diagnostic Imaging (IDI and São Paulo Municipal Health Program. METHODS: A total of 139,945 Brazilian women were assessed by means of mammography between April 2002 and September 2004. Using the American College of Radiology (ACR criteria (Breast Imaging Reporting and Data System, BIRADS®, the prevalence of suspected and highly suspected breast lesions were determined. RESULTS: The prevalence of suspected (BIRADS® 4 and highly suspected (BIRADS® 5 lesions increased with age, especially after the fourth decade. Accordingly, BIRADS® 4 and BIRADS® 5 lesions were more prevalent in the fourth, fifth, sixth and seventh decades. CONCLUSION: The presumed prevalence of suspected and highly suspected breast cancer lesions in the population of São Paulo was 0.6% and it is similar to the prevalence of breast cancer observed in other populations.

  9. Evolution of Choroidal Neovascularization due to Presumed Ocular Histoplasmosis Syndrome on Multimodal Imaging including Optical Coherence Tomography Angiography

    Directory of Open Access Journals (Sweden)

    T. Y. Alvin Liu

    2018-01-01

    Full Text Available A 37-year-old Caucasian woman presented with acute decrease in central vision in her right eye and was found to have subfoveal choroidal neovascularization (CNV due to presumed ocular histoplasmosis syndrome (POHS. Her visual acuity improved from 20/70 to 20/20 at her 6-month follow-up, after 3 consecutive monthly intravitreal bevacizumab injections were initiated at her first visit. Although no CNV activity was seen on fluorescein angiography (FA or spectral-domain optical coherence tomography (SD-OCT at her 2-month, 4-month, and 6-month follow-up visits, persistent flow in the CNV lesion was detected on optical coherence tomography angiography (OCTA. OCTA shows persistent vascular flow as well as changes in vascular flow in CNV lesions associated with POHS, indicating the continued presence of patent vessels and changes in these CNV lesions, even when traditional imaging of the lesion with OCT and FA indicates stability of the lesion with no disease activity. Additional cases with longitudinal follow-up are needed to assess how OCTA should be incorporated into clinical practice.

  10. White matter hyperintensities of presumed vascular origin: a population-based study in rural Ecuador (The Atahualpa Project).

    Science.gov (United States)

    Del Brutto, Oscar H; Mera, Robertino M; Del Brutto, Victor J; Zambrano, Mauricio; Lama, Julio

    2015-04-01

    Cerebral small vessel disease is probably one of the most common pathogenetic mechanisms underlying stroke in Latin America. However, the importance of silent markers of small vessel disease, including white matter hyperintensities of presumed vascular origin, has not been assessed so far. The study aims to evaluate prevalence and correlates of white matter hyperintensities in community-dwelling elders living in Atahualpa (rural Ecuador). Atahualpa residents aged ≥ 60 years were identified during a door-to-door survey and invited to undergo brain magnetic resonance imaging for identification and grading white matter hyperintensities and other markers of small vessel disease. Using multivariate logistic regression models, we evaluated whether white matter hyperintensities is associated with demographics, cardiovascular health status, stroke, cerebral microbleeds, and cortical atrophy, after adjusting for the other variables. Out of 258 enrolled persons (mean age, 70 ± 8 years; 59% women), 172 (67%) had white matter hyperintensities, which were moderate to severe in 63. Analyses showed significant associations of white matter hyperintensities presence and severity with age and cardiovascular health status, as well as with overt and silent strokes, and a trend for association with cerebral microbleeds and cortical atrophy. Prevalence and correlates of white matter hyperintensities in elders living in rural Ecuador is almost comparable with that reported from industrialized nations, reinforcing the concept that the burden of small vessel disease is on the rise in underserved Latin American populations. © 2014 World Stroke Organization.

  11. Information Theoretic Shape Matching.

    Science.gov (United States)

    Hasanbelliu, Erion; Giraldo, Luis Sanchez; Príncipe, José C

    2014-12-01

    In this paper, we describe two related algorithms that provide both rigid and non-rigid point set registration with different computational complexity and accuracy. The first algorithm utilizes a nonlinear similarity measure known as correntropy. The measure combines second and high order moments in its decision statistic showing improvements especially in the presence of impulsive noise. The algorithm assumes that the correspondence between the point sets is known, which is determined with the surprise metric. The second algorithm mitigates the need to establish a correspondence by representing the point sets as probability density functions (PDF). The registration problem is then treated as a distribution alignment. The method utilizes the Cauchy-Schwarz divergence to measure the similarity/distance between the point sets and recover the spatial transformation function needed to register them. Both algorithms utilize information theoretic descriptors; however, correntropy works at the realizations level, whereas Cauchy-Schwarz divergence works at the PDF level. This allows correntropy to be less computationally expensive, and for correct correspondence, more accurate. The two algorithms are robust against noise and outliers and perform well under varying levels of distortion. They outperform several well-known and state-of-the-art methods for point set registration.

  12. Discriminative Shape Alignment

    DEFF Research Database (Denmark)

    Loog, M.; de Bruijne, M.

    2009-01-01

    , not taking into account that eventually the shapes are to be assigned to two or more different classes. This work introduces a discriminative variation to well-known Procrustes alignment and demonstrates its benefit over this classical method in shape classification tasks. The focus is on two...

  13. Shape from touch

    NARCIS (Netherlands)

    Kappers, A.M.L.; Bergmann Tiest, W.M.

    2014-01-01

    The shape of objects cannot only be recognized by vision, but also by touch. Vision has the advantage that shapes can be seen at a distance, but touch has the advantage that during exploration many additional object properties become available, such as temperature (Jones, 2009), texture (Bensmaia,

  14. Improving the Subgrid-Scale Representation of Hydrometeors and Microphysical Feedback Effects Using a Multivariate PDF

    Science.gov (United States)

    Griffin, Brian M.

    The subgrid-scale representation of hydrometeor fields is important for calculating microphysical process rates. In order to represent subgrid-scale variability, the Cloud Layers Unified By Binormals (CLUBB) parameterization uses a multivariate Probability Density Function (PDF). In addition to vertical velocity, temperature, and moisture fields, the PDF includes hydrometeor fields. Previously, each hydrometeor field was assumed to follow a multivariate single lognormal distribution. Now, in order to better represent the distribution of hydrometeors, two new multivariate PDFs are formulated and introduced in part one of this two-part project. The new PDFs represent hydrometeors using either a delta-lognormal or a delta-double-lognormal shape. The two new PDF distributions, plus the previous single lognormal shape, are compared to histograms of data taken from Large-Eddy Simulations (LES) of a precipitating cumulus case, a drizzling stratocumulus case, and a deep convective case. Finally, the warm microphysical process rates produced by the different hydrometeor PDFs are compared to the same process rates produced by the LES. Microphysics processes have feedback effects on moisture and heat content. Not only do these processes influence mean values, but also variability and fluxes of moisture and heat content. For example, evaporation of rain below cloud base may produce cold pools. This evaporative cooling may increase the variability in temperature in the below-cloud layer. Likewise, rain production in the moistest part of cloud tends to decrease variability in cloud water. These effects are usually not included in most coarse-resolution weather and climate models, or else are crudely parameterized. In part two of this two-part project, the microphysical effects on moisture and heat content are parameterized using the PDF method. This approach is based on predictive, horizontally-averaged equations for the variances, covariances, and fluxes of moisture and heat

  15. Fatal presumed tiger snake (Notechis scutatus) envenomation in a cat with measurement of venom and antivenom concentration.

    Science.gov (United States)

    Padula, Andrew M; Winkel, Kenneth D

    2016-04-01

    A fatal outcome of a presumed tiger snake (Notechis scutatus) envenomation in a cat is described. Detectable venom components and antivenom concentrations in serum from clotted and centrifuged whole blood and urine were measured using a sensitive and specific ELISA. The cat presented in a paralysed state with a markedly elevated serum CK but with normal clotting times. The cat was treated with intravenous fluids and received two vials of equine whole IgG bivalent (tiger and brown snake) antivenom. Despite treatment the cat's condition did not improve and it died 36 h post-presentation. Serum concentration of detectable tiger snake venom components at initial presentation was 311 ng/mL and urine 832 ng/mL, this declined to non-detectable levels in serum 15-min after intravenous antivenom. Urine concentration of detectable tiger snake venom components declined to 22 ng/mL at post-mortem. Measurement of equine anti-tiger snake venom specific antibody demonstrated a concentration of 7.2 Units/mL in serum at post-mortem which had declined from an initial high of 13 Units/mL at 15-min post-antivenom. The ELISA data demonstrated the complete clearance of detectable venom components from serum with no recurrence in the post-mortem samples. Antivenom concentrations in serum at initial presentation were at least 100-fold higher than theoretically required to neutralise the circulating concentrations of venom. Despite the fatal outcome in this case it was concluded that this was unlikely that is was due to insufficient antivenom. Copyright © 2016 Elsevier Ltd. All rights reserved.

  16. Treatment for presumed BK polyomavirus nephropathy and risk of urinary tract cancers among kidney transplant recipients in the United States.

    Science.gov (United States)

    Gupta, Gaurav; Kuppachi, Sarat; Kalil, Roberto S; Buck, Christopher B; Lynch, Charles F; Engels, Eric A

    2018-01-01

    Recent case series describe detection of BK polyomavirus (BKV) in urinary tract cancers in kidney transplant recipients, suggesting that BKV could contribute to the development of these cancers. We assessed risk for urinary tract cancers in kidney recipients with or without treatment for presumed BKV nephropathy (tBKVN) using data from the United States Transplant Cancer Match Study (2003-2013). Among 55 697 included recipients, 2015 (3.6%) were reported with tBKVN. Relative to the general population, incidence was similarly elevated (approximately 4.5-fold) for kidney cancer in recipients with or without tBKVN, and incidence was not increased in either group for prostate cancer. In contrast, for invasive bladder cancer, incidence was more strongly elevated in recipients with versus without tBKVN (standardized incidence ratios 4.5 vs. 1.7; N = 48 cases), corresponding to an incidence rate ratio (IRR) of 2.9 (95% confidence interval [CI] 1.0-8.2), adjusted for sex, age, transplant year, and use of polyclonal antibody induction. As a result, recipients with tBKVN had borderline increased incidence for all urothelial cancers combined (renal pelvis, ureter, and bladder cancers: adjusted IRR 2.2, 95% CI 0.9-5.4; N = 89 cases). Together with reports describing BKV detection in tumor tissues, these results support an association between BKV and urothelial carcinogenesis among kidney transplant recipients. © 2017 The American Society of Transplantation and the American Society of Transplant Surgeons.

  17. Extra Dimensions: 3D in PDF Documentation

    International Nuclear Information System (INIS)

    Graf, Norman A

    2012-01-01

    Experimental science is replete with multi-dimensional information which is often poorly represented by the two dimensions of presentation slides and print media. Past efforts to disseminate such information to a wider audience have failed for a number of reasons, including a lack of standards which are easy to implement and have broad support. Adobe's Portable Document Format (PDF) has in recent years become the de facto standard for secure, dependable electronic information exchange. It has done so by creating an open format, providing support for multiple platforms and being reliable and extensible. By providing support for the ECMA standard Universal 3D (U3D) and the ISO PRC file format in its free Adobe Reader software, Adobe has made it easy to distribute and interact with 3D content. Until recently, Adobe's Acrobat software was also capable of incorporating 3D content into PDF files from a variety of 3D file formats, including proprietary CAD formats. However, this functionality is no longer available in Acrobat X, having been spun off to a separate company. Incorporating 3D content now requires the additional purchase of a separate plug-in. In this talk we present alternatives based on open source libraries which allow the programmatic creation of 3D content in PDF format. While not providing the same level of access to CAD files as the commercial software, it does provide physicists with an alternative path to incorporate 3D content into PDF files from such disparate applications as detector geometries from Geant4, 3D data sets, mathematical surfaces or tesselated volumes.

  18. The exchangeability of shape

    Directory of Open Access Journals (Sweden)

    Kaba Dramane

    2010-10-01

    Full Text Available Abstract Background Landmark based geometric morphometrics (GM allows the quantitative comparison of organismal shapes. When applied to systematics, it is able to score shape changes which often are undetectable by traditional morphological studies and even by classical morphometric approaches. It has thus become a fast and low cost candidate to identify cryptic species. Due to inherent mathematical properties, shape variables derived from one set of coordinates cannot be compared with shape variables derived from another set. Raw coordinates which produce these shape variables could be used for data exchange, however they contain measurement error. The latter may represent a significant obstacle when the objective is to distinguish very similar species. Results We show here that a single user derived dataset produces much less classification error than a multiple one. The question then becomes how to circumvent the lack of exchangeability of shape variables while preserving a single user dataset. A solution to this question could lead to the creation of a relatively fast and inexpensive systematic tool adapted for the recognition of cryptic species. Conclusions To preserve both exchangeability of shape and a single user derived dataset, our suggestion is to create a free access bank of reference images from which one can produce raw coordinates and use them for comparison with external specimens. Thus, we propose an alternative geometric descriptive system that separates 2-D data gathering and analyzes.

  19. Role of samarium additions on the shape memory behavior of iron based alloys

    International Nuclear Information System (INIS)

    Shakoor, R.A.; Khalid, F. Ahmad; Kang, Kisuk

    2011-01-01

    Research highlights: → The effect of samarium contents on shape memory behavior has been studied. → Addition of samarium increases the strength, c/a ratio and ε (hcp martensite). → Addition of samarium retards the nucleation of α (bcc martensite). → Improvement in shape memory effect with the increase in samarium contents. - Abstract: The effect of samarium contents on shape memory behavior of iron based shape memory alloys has been studied. It is found that the strength of the alloys increases with the increase in samarium contents. This effect can be attributed to the solid solution strengthening of austenite by samarium addition. It is also noticed that the shape memory effect increases with the increase in samarium contents. This improvement in shape memory effect presumably can be regarded as the effect of improvement in strength, increase in c/a ratio and obstruction of nucleation of α in the microstructure.

  20. A GPU accelerated PDF transparency engine

    Science.gov (United States)

    Recker, John; Lin, I.-Jong; Tastl, Ingeborg

    2011-01-01

    As commercial printing presses become faster, cheaper and more efficient, so too must the Raster Image Processors (RIP) that prepare data for them to print. Digital press RIPs, however, have been challenged to on the one hand meet the ever increasing print performance of the latest digital presses, and on the other hand process increasingly complex documents with transparent layers and embedded ICC profiles. This paper explores the challenges encountered when implementing a GPU accelerated driver for the open source Ghostscript Adobe PostScript and PDF language interpreter targeted at accelerating PDF transparency for high speed commercial presses. It further describes our solution, including an image memory manager for tiling input and output images and documents, a PDF compatible multiple image layer blending engine, and a GPU accelerated ICC v4 compatible color transformation engine. The result, we believe, is the foundation for a scalable, efficient, distributed RIP system that can meet current and future RIP requirements for a wide range of commercial digital presses.

  1. Direct photon production and PDF fits reloaded

    Energy Technology Data Exchange (ETDEWEB)

    Campbell, John M.; Rojo, Juan; Slade, Emma; Williams, Ciaran

    2018-02-08

    Direct photon production in hadronic collisions provides a handle on the gluon PDF by means of the QCD Compton scattering process. In this work we revisit the impact of direct photon production on a global PDF analysis, motivated by the recent availability of the next-to-next-to-leading (NNLO) calculation for this process. We demonstrate that the inclusion of NNLO QCD and leading-logarithmic electroweak corrections leads to a good quantitative agreement with the ATLAS measurements at 8 TeV and 13 TeV, except for the most forward rapidity region in the former case. By including the ATLAS 8 TeV direct photon production data in the NNPDF3.1 NNLO global analysis, we assess its impact on the medium-x gluon. We also study the constraining power of the direct photon production measurements on PDF fits based on different datasets, in particular on the NNPDF3.1 no-LHC and collider-only fits. We also present updated NNLO theoretical predictions for direct photon production at 13 TeV that include the constraints from the 8 TeV measurements.

  2. Shaping light with MOEMS

    Science.gov (United States)

    Noell, W.; Weber, S.; Masson, J.; Extermann, J.; Bonacina, L.; Bich, A.; Bitterli, R.; Herzig, H. P.; Kiselev, D.; Scharf, T.; Voelkel, R.; Weible, K. J.; Wolf, J.-P.; de Rooij, N. F.

    2011-03-01

    Shaping light with microtechnology components has been possible for many years. The Texas Instruments digital micromirror device (DMD) and all types of adaptive optics systems are very sophisticated tools, well established and widely used. Here we present, however, two very dedicated systems, where one is an extremely simple MEMS-based tunable diffuser, while the second device is complex micromirror array with new capabilities for femtosecond laser pulse shaping. Showing the two systems right next to each other demonstrates the vast options and versatility of MOEMS for shaping light in the space and time domain.

  3. The PDF4LHC Working Group Interim Report

    CERN Document Server

    Alekhin, Sergey; Ball, Richard D.; Bertone, Valerio; Blumlein, Johannes; Botje, Michiel; Butterworth, Jon; Cerutti, Francesco; Cooper-Sarkar, Amanda; de Roeck, Albert; Del Debbio, Luigi; Feltesse, Joel; Forte, Stefano; Glazov, Alexander; Guffanti, Alberto; Gwenlan, Claire; Huston, Joey; Jimenez-Delgado, Pedro; Lai, Hung-Liang; Latorre, Jose I.; McNulty, Ronan; Nadolsky, Pavel; Olaf Moch, Sven; Pumplin, Jon; Radescu, Voica; Rojo, Juan; Sjostrand, Torbjorn; Stirling, W.J.; Stump, Daniel; Thorne, Robert S.; Ubiali, Maria; Vicini, Alessandro; Watt, Graeme; Yuan, C.-P.

    2011-01-01

    This document is intended as a study of benchmark cross sections at the LHC (at 7 TeV) at NLO using modern parton distribution functions currently available from the 6 PDF fitting groups that have participated in this exercise. It also contains a succinct user guide to the computation of PDFs, uncertainties and correlations using available PDF sets. A companion note, also submitted to the archive, provides an interim summary of the current recommendations of the PDF4LHC working group for the use of parton distribution functions and of PDF uncertainties at the LHC, for cross section and cross section uncertainty calculations.

  4. Deep PDF parsing to extract features for detecting embedded malware.

    Energy Technology Data Exchange (ETDEWEB)

    Munson, Miles Arthur; Cross, Jesse S. (Missouri University of Science and Technology, Rolla, MO)

    2011-09-01

    The number of PDF files with embedded malicious code has risen significantly in the past few years. This is due to the portability of the file format, the ways Adobe Reader recovers from corrupt PDF files, the addition of many multimedia and scripting extensions to the file format, and many format properties the malware author may use to disguise the presence of malware. Current research focuses on executable, MS Office, and HTML formats. In this paper, several features and properties of PDF Files are identified. Features are extracted using an instrumented open source PDF viewer. The feature descriptions of benign and malicious PDFs can be used to construct a machine learning model for detecting possible malware in future PDF files. The detection rate of PDF malware by current antivirus software is very low. A PDF file is easy to edit and manipulate because it is a text format, providing a low barrier to malware authors. Analyzing PDF files for malware is nonetheless difficult because of (a) the complexity of the formatting language, (b) the parsing idiosyncrasies in Adobe Reader, and (c) undocumented correction techniques employed in Adobe Reader. In May 2011, Esparza demonstrated that PDF malware could be hidden from 42 of 43 antivirus packages by combining multiple obfuscation techniques [4]. One reason current antivirus software fails is the ease of varying byte sequences in PDF malware, thereby rendering conventional signature-based virus detection useless. The compression and encryption functions produce sequences of bytes that are each functions of multiple input bytes. As a result, padding the malware payload with some whitespace before compression/encryption can change many of the bytes in the final payload. In this study we analyzed a corpus of 2591 benign and 87 malicious PDF files. While this corpus is admittedly small, it allowed us to test a system for collecting indicators of embedded PDF malware. We will call these indicators features throughout

  5. The shapes of column density PDFs. The importance of the last closed contour

    Science.gov (United States)

    Alves, João; Lombardi, Marco; Lada, Charles J.

    2017-10-01

    The probability distribution function of column density (PDF) has become the tool of choice for cloud structure analysis and star formation studies. Its simplicity is attractive, and the PDF could offer access to cloud physical parameters otherwise difficult to measure, but there has been some confusion in the literature on the definition of its completeness limit and shape at the low column density end. In this letter we use the natural definition of the completeness limit of a column density PDF, the last closed column density contour inside a surveyed region, and apply it to a set of large-scale maps of nearby molecular clouds. We conclude that there is no observational evidence for log-normal PDFs in these objects. We find that all studied molecular clouds have PDFs well described by power laws, including the diffuse cloud Polaris. Our results call for a new physical interpretation of the shape of the column density PDFs. We find that the slope of a cloud PDF is invariant to distance but not to the spatial arrangement of cloud material, and as such it is still a useful tool for investigating cloud structure.

  6. Shape memory polyurethane nanocomposites

    Science.gov (United States)

    Cao, Feina

    Shape memory polymers are smart materials which can remember their original shapes. However, the low recovery stress and low mechanical strength limit the commercial applications of shape memory polymers. In this study, nanoclays were introduced to shape memory polyurethanes (SMPU) to augment these properties by enhance the network of SMPU. Several factors which influence the shape recovery stress were evaluated, including the nature of polymer chain by using different monomers, type of clay particles, extent of filler dispersion, clay content and deformation conditions. It was found that only reactive clay particles were well dispersed into polyurethane matrix by the tethering between --CH2CH 2OH functional groups in clay surfactants and polyurethane chains. Two different shape memory polyurethanes (Systems I & II) prepared by bulk polymerization were compared. The shape memory effect of System I was triggered by melting of the soft segment crystals, while that of System II was by glass transition of the soft segments. It was seen that the reactive clay particles dispersed well in both polyurethane matrices and augmented the recovery stress, e.g., 20% increase with 1 wt % nanoclay in System I and 40% increase with 5 wt % nanoclay in System II were observed. In System I, clay particles interfered with soft segment crystallization, and promoted phase mixing between the hard and soft segments, thus affecting the fixity and recovery ratio. Nevertheless, the soft segment crystallinity was still enough and in some cases increased due to stretching to exhibit excellent shape fixity and shape recovery ratio. The higher loading of clay particles accelerated the stress relaxation, resulting in reduction of recovery stress. In System II, no significant effect of clay particles in phase separation was observed, so there was no influence of clay on shape fixity and recovery ratio. The recovery stress increased with reactive nanoclay content. It was also found that the recovery

  7. The influence of low process temperature on the hydrodynamic radius of polyNIPAM-co-PEG thermosensitive nanoparticles presumed as drug carriers for bioactive proteins

    Czech Academy of Sciences Publication Activity Database

    Musial, W.; Michálek, Jiří

    2015-01-01

    Roč. 72, č. 1 (2015), s. 161-169 ISSN 0001-6837 Institutional support: RVO:61389013 Keywords : nanogel * N-isopropylacrylamide * thermosensitivity Subject RIV: CD - Macromolecular Chemistry Impact factor: 0.877, year: 2015 http://www.ptfarm.pl/pub/File/Acta_Poloniae/2015/1/161.pdf

  8. Shaping the Global Environment

    Science.gov (United States)

    2002-04-09

    SHAPING THE GLOBAL ENVIRONMENT BY LIEUTENANT COLONEL MICHAEL D. ELLERBE United States Army DISTRIBUTION STATEMENT A: Approved for public release...THE GLOBAL ENVIRONMENT by Lieutenant Colonel Michael D. Ellerbe United States Army Colonel Jef Troxel Project Advisor The views expressed in this...Distribution is unlimited. ii ABSTRACT AUTHOR: Michael D. Ellerbe TITLE: SHAPING THE GLOBAL ENVIRONMENT FORMAT: Strategy Research Project DATE: 09 April

  9. Intravenous Thrombolysis for Stroke and Presumed Stroke in Human Immunodeficiency Virus-Infected Adults: A Retrospective, Multicenter US Study.

    Science.gov (United States)

    AbdelRazek, Mahmoud A; Gutierrez, Jose; Mampre, David; Cervantes-Arslanian, Anna; Ormseth, Cora; Haussen, Diogo; Thakur, Kiran T; Lyons, Jennifer L; Smith, Bryan R; O'Connor, Owen; Willey, Joshua Z; Mateen, Farrah J

    2018-01-01

    Human immunodeficiency virus (HIV) infection has been shown to increase both ischemic and hemorrhagic stroke risks, but there are limited data on the safety and outcomes of intravenous thrombolysis with tPA (tissue-type plasminogen activator) for acute ischemic stroke in HIV-infected patients. A retrospective chart review of intravenous tPA-treated HIV patients who presented with acute stroke symptoms was performed in 7 large inner-city US academic centers (various search years between 2000 and 2017). We collected data on HIV, National Institutes of Health Stroke Scale score, ischemic stroke risk factors, opportunistic infections, intravenous drug abuse, neuroimaging findings, and modified Rankin Scale score at last follow-up. We identified 33 HIV-infected patients treated with intravenous tPA (mean age, 51 years; 24 men), 10 of whom were stroke mimics. Sixteen of 33 (48%) patients had an HIV viral load less than the limit of detection while 10 of 33 (30%) had a CD4 count Stroke Scale score at presentation was 9, and mean time from symptom onset to tPA was 144 minutes (median, 159). The median modified Rankin Scale score for the 33-patient cohort was 1 and for the 23-patient actual stroke cohort was 2, measured at a median of 90 days poststroke symptom onset. Two patients had nonfatal hemorrhagic transformation (6%; 95% confidence interval, 1%-20%), both in the actual stroke group. Two patients had varicella zoster virus vasculitis of the central nervous system, 1 had meningovascular syphilis, and 7 other patients were actively using intravenous drugs (3 cocaine, 1 heroin, and 3 unspecified), none of whom had hemorrhagic transformation. Most HIV-infected patients treated with intravenous tPA for presumed and actual acute ischemic stroke had no complications, and we observed no fatalities. Stroke mimics were common, and thrombolysis seems safe in this group. We found no data to suggest an increased risk of intravenous tPA-related complications because of concomitant

  10. Shape memory alloy engine

    International Nuclear Information System (INIS)

    Tanaka, M.

    1992-01-01

    This paper discusses a shape memory alloy engine, developed for the purpose of extracting the mechanical energy from a small difference in temperature. The engine is mainly composed of two pulleys (high temperature and low temperature) and single belt made of the nickel titanium shape memory alloy. The alloy memorizes a shape arcing in the direction opposite to the direction of the belt arc around the pulleys. When the temperature of the belt which is in contact with the high temperature pulley rises above the transformation temperature, a return to the memorized shape generates a force which rotates the pulleys. To make the heat transfer more effective, the engine was designed so that the lower part of the two pulleys are embedded in hot and cold water, respectively. To predict the performance of the shape memory alloy engine, the stress change of the shape memory alloy caused by temperature change has been also investigated with the bending stress test, and a torque loss of the engine system was measured. The predicted results were coincident with the output power experiment

  11. On Characterizing Particle Shape

    Science.gov (United States)

    Ennis, Bryan J.; Rickman, Douglas; Rollins, A. Brent; Ennis, Brandon

    2014-01-01

    It is well known that particle shape affects flow characteristics of granular materials, as well as a variety of other solids processing issues such as compaction, rheology, filtration and other two-phase flow problems. The impact of shape crosses many diverse and commercially important applications, including pharmaceuticals, civil engineering, metallurgy, health, and food processing. Two applications studied here include the dry solids flow of lunar simulants (e.g. JSC-1, NU-LHT-2M, OB-1), and the flow properties of wet concrete, including final compressive strength. A multi-dimensional generalized, engineering method to quantitatively characterize particle shapes has been developed, applicable to both single particle orientation and multi-particle assemblies. The two-dimension, three dimension inversion problem is also treated, and the application of these methods to DEM model particles will be discussed. In the case of lunar simulants, flow properties of six lunar simulants have been measured, and the impact of particle shape on flowability - as characterized by the shape method developed here -- is discussed, especially in the context of three simulants of similar size range. In the context of concrete processing, concrete construction is a major contributor to greenhouse gas production, of which the major contributor is cement binding loading. Any optimization in concrete rheology and packing that can reduce cement loading and improve strength loading can also reduce currently required construction safety factors. The characterization approach here is also demonstrated for the impact of rock aggregate shape on concrete slump rheology and dry compressive strength.

  12. Shapes of interacting RNA complexes

    DEFF Research Database (Denmark)

    Fu, Benjamin Mingming; Reidys, Christian

    2014-01-01

    Shapes of interacting RNA complexes are studied using a filtration via their topological genus. A shape of an RNA complex is obtained by (iteratively) collapsing stacks and eliminating hairpin loops.This shape-projection preserves the topological core of the RNA complex and for fixed topological...... genus there are only finitely many such shapes. Our main result is a new bijection that relates the shapes of RNA complexes with shapes of RNA structures. This allows to compute the shape polynomial of RNA complexes via the shape polynomial of RNA structures. We furthermore present a linear time uniform...... sampling algorithm for shapes of RNA complexes of fixed topological genus....

  13. Even Lesbian Youths or Those Presumed to Be Lesbians Are Protected by the Constitution of Uganda--But to a Limited Extent: Rules the High Court

    Science.gov (United States)

    Mujuzi, Jamil Ddamulira

    2009-01-01

    The Ugandan Penal Code criminalizes same-sex relationships. The author analyzes the Ugandan High Court decision where the judge relied on the Constitution and international human rights instruments to hold that law enforcement officers must respect the rights to privacy and human dignity even of those people presumed to be in same-sex…

  14. Shorter Leukocyte Telomere Length in Relation to Presumed Nonalcoholic Fatty Liver Disease in Mexican-American Men in NHANES 1999–2002

    Directory of Open Access Journals (Sweden)

    Janet M. Wojcicki

    2017-01-01

    Full Text Available Leukocyte telomere length is shorter in response to chronic disease processes associated with inflammation such as diabetes mellitus and coronary artery disease. Data from the National Health and Nutrition Examination Survey (NHANES from 1999 to 2002 was used to explore the relationship between leukocyte telomere length and presumed NAFLD, as indicated by elevated serum alanine aminotransferase (ALT levels, obesity, or abdominal obesity. Logistic regression models were used to evaluate the relationship between telomere length and presumed markers of NAFLD adjusting for possible confounders. There was no relationship between elevated ALT levels, abdominal obesity, or obesity and telomere length in adjusted models in NHANES (OR 1.13, 95% CI 0.48–2.65; OR 1.17, 95% CI 0.52–2.62, resp.. Mexican-American men had shorter telomere length in relation to presumed NAFLD (OR 0.07, 95% CI 0.006–0.79 and using different indicators of NAFLD (OR 0.012, 95% CI 0.0006–0.24. Mexican origin with presumed NAFLD had shorter telomere length than men in other population groups. Longitudinal studies are necessary to evaluate the role of telomere length as a potential predictor to assess pathogenesis of NALFD in Mexicans.

  15. Evaluation of a deep learning approach for the segmentation of brain tissues and white matter hyperintensities of presumed vascular origin in MRI

    NARCIS (Netherlands)

    Moeskops, Pim; de Bresser, Jeroen; Kuijf, Hugo J.; Mendrik, AM; Biessels, Geert Jan; Pluim, Josien P.W.; Išgum, Ivana

    2018-01-01

    Automatic segmentation of brain tissues and white matter hyperintensities of presumed vascular origin (WMH) in MRI of older patients is widely described in the literature. Although brain abnormalities and motion artefacts are common in this age group, most segmentation methods are not evaluated in a

  16. SHAPE selection (SHAPES) enrich for RNA structure signal in SHAPE sequencing-based probing data

    DEFF Research Database (Denmark)

    Poulsen, Line Dahl; Kielpinski, Lukasz Jan; Salama, Sofie R

    2015-01-01

    transcriptase. Here, we introduce a SHAPE Selection (SHAPES) reagent, N-propanone isatoic anhydride (NPIA), which retains the ability of SHAPE reagents to accurately probe RNA structure, but also allows covalent coupling between the SHAPES reagent and a biotin molecule. We demonstrate that SHAPES...

  17. Shape memory polymer medical device

    Science.gov (United States)

    Maitland, Duncan [Pleasant Hill, CA; Benett, William J [Livermore, CA; Bearinger, Jane P [Livermore, CA; Wilson, Thomas S [San Leandro, CA; Small, IV, Ward; Schumann, Daniel L [Concord, CA; Jensen, Wayne A [Livermore, CA; Ortega, Jason M [Pacifica, CA; Marion, III, John E.; Loge, Jeffrey M [Stockton, CA

    2010-06-29

    A system for removing matter from a conduit. The system includes the steps of passing a transport vehicle and a shape memory polymer material through the conduit, transmitting energy to the shape memory polymer material for moving the shape memory polymer material from a first shape to a second and different shape, and withdrawing the transport vehicle and the shape memory polymer material through the conduit carrying the matter.

  18. Jet Shapes at CMS

    CERN Document Server

    Kurt, Pelin

    2008-01-01

    The CMS (Compact Muon Solenoid) detector will observe high transverse momentum jets produced in the final state of proton-proton collisions at the center of mass energy of 14 TeV. These data will allow us to measure jet shapes, defined as the fractional transverse momentum distribution as a function of the distance from the jet axis. Since jet shapes are sensitive to parton showering processes they provide a good test of Monte Carlo event simulation programs. In this note we present a study of jet shapes reconstructed using calorimeter energies. We compare the predictions of the Monte Carlo generators PYTHIA and HERWIG++. Presented results are expected for $pp$ collisions at 14 TeV assuming an integrated luminosity of 10 pb$^{-1}$.

  19. Laser beam shaping techniques

    Energy Technology Data Exchange (ETDEWEB)

    DICKEY,FRED M.; WEICHMAN,LOUIS S.; SHAGAM,RICHARD N.

    2000-03-16

    Industrial, military, medical, and research and development applications of lasers frequently require a beam with a specified irradiance distribution in some plane. A common requirement is a laser profile that is uniform over some cross-section. Such applications include laser/material processing, laser material interaction studies, fiber injection systems, optical data image processing, lithography, medical applications, and military applications. Laser beam shaping techniques can be divided into three areas: apertured beams, field mappers, and multi-aperture beam integrators. An uncertainty relation exists for laser beam shaping that puts constraints on system design. In this paper the authors review the basics of laser beam shaping and present applications and limitations of various techniques.

  20. Shape evolution and magnetic rotation in {sup 141}Nd

    Energy Technology Data Exchange (ETDEWEB)

    Zerrouki, T.; Petrache, C.M.; Leguillon, R.; Hauschild, K.; Korichi, A.; Lopez-Martens, A. [Universite Paris-Sud and CNRS/IN2P3, Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, Orsay (France); Frauendorf, S. [University of Notre Dame, Department of Physics, Notre Dame, IN (United States); Ragnarsson, I. [Lund University, Division of Mathematical Physics, LTH, P.O. Box 118, Lund (Sweden); Huebel, H.; Neusser-Neffgen, A.; Al-Khatib, A.; Bringel, P.; Buerger, A.; Nenoff, N.; Schoenwasser, G.; Singh, A.K. [Universitaet Bonn, Helmholtz-Institut fuer Strahlen- und Kernphysik, Bonn (Germany); Curien, D. [DRS-IPHC, Departement de Recherches Subatomiques, Institut Pluridisciplinaire Hubert Curien, 23 rue du Loess, BP 28, Strasbourg (France); Hagemann, G.B.; Herskind, B.; Sletten, G. [Niels Bohr Institute, Copenhagen (Denmark); Fallon, P. [Lawrence Berkeley National Laboratory, Nuclear Science Division, Berkeley, CA (United States); Goergen, A. [University of Oslo, Departement de Physics, Oslo (Norway); Bednarczyk, P. [Polish Academy of Sciences, The Niewodniczanski Institute of Nuclear Physics, Krakow (Poland)

    2015-04-01

    The high-spin states in {sup 141}Nd were investigated using the {sup 96}Zr({sup 48}Ca, 3n) reaction and the EUROBALL array. The level scheme has been extended up to an excitation energy of around 16MeV and spin 81/2. Two new bands of dipole transitions and three bands presumably of quadrupole transitions were identified and their connections to low-lying states were established. Cranked Nilsson-Strutinsky and tilted axis cranking calculations are combined in the interpretation of the observed dipole bands. The high-spin bands with assigned quadrupole transitions are interpreted as triaxial bands, while the dipole bands appear in the calculations to exhibit a shape evolution from low-deformation triaxial to spherical shape. They can be classified as magnetic rotation, with transition probabilities that show the characteristic decrease with angular momentum caused by the shears mechanism. (orig.)

  1. PDF4LHC recommendations for LHC Run II

    CERN Document Server

    Butterworth, Jon; Cooper-Sarkar, Amanda; De Roeck, Albert; Feltesse, Joel; Forte, Stefano; Gao, Jun; Glazov, Sasha; Huston, Joey; Kassabov, Zahari; McNulty, Ronan; Morsch, Andreas; Nadolsky, Pavel; Radescu, Voica; Rojo, Juan; Thorne, Robert

    2016-01-01

    We provide an updated recommendation for the usage of sets of parton distribution functions (PDFs) and the assessment of PDF and PDF+$\\alpha_s$ uncertainties suitable for applications at the LHC Run II. We review developments since the previous PDF4LHC recommendation, and discuss and compare the new generation of PDFs, which include substantial information from experimental data from the Run I of the LHC. We then propose a new prescription for the combination of a suitable subset of the available PDF sets, which is presented in terms of a single combined PDF set. We finally discuss tools which allow for the delivery of this combined set in terms of optimized sets of Hessian eigenvectors or Monte Carlo replicas, and their usage, and provide some examples of their application to LHC phenomenology.

  2. Shape memory effect alloys

    International Nuclear Information System (INIS)

    Koshimizu, S.

    1992-01-01

    Although the pseudo- or super-elasticity phenomena and the shape memory effect were known since the 1940's, the enormous curiosity and the great interest to their practical applications emerged with the development of the NITINOL alloy (Nickel-Titanium Naval Ordance Laboratory) by the NASA during the 1960's. This fact marked the appearance of a new class of materials, popularly known as shape memory effect alloys (SMEA). The objective of this work is to present a state-of-the-art of the development and applications for the SMEA. (E.O.)

  3. Covering folded shapes

    Directory of Open Access Journals (Sweden)

    Oswin Aichholzer

    2014-05-01

    Full Text Available Can folding a piece of paper flat make it larger? We explore whether a shape S must be scaled to cover a flat-folded copy of itself. We consider both single folds and arbitrary folds (continuous piecewise isometries \\(S\\to\\mathbb{R}^2\\. The underlying problem is motivated by computational origami, and is related to other covering and fixturing problems, such as Lebesgue's universal cover problem and force closure grasps. In addition to considering special shapes (squares, equilateral triangles, polygons and disks, we give upper and lower bounds on scale factors for single folds of convex objects and arbitrary folds of simply connected objects.

  4. Social Shaping of Innovation

    DEFF Research Database (Denmark)

    Buur, Jacob; Mack, Alexandra

    - in particular in a large corporation? This workshop explores how innovation is socially shaped in organizations. Based on our experiences with practices around innovation and collaboration, we start from three proposition about the social shaping of innovation: • Ideas don't thrive as text (i.e. we need...... to consider other media) • Ideas need socialization (ideas are linked to people, we need to be careful about how we support the social innovation context) • Ideas are local (ideas spring out of a local contingency, we need to take care in how we like them to travel)....

  5. Thermomechanical treatment and deformation behavior of iron based shape memory alloys

    International Nuclear Information System (INIS)

    Shakoor, R.A.; Khalid, F.A.; Draper, P.H.

    2007-01-01

    The thermomechanical treatment (training) and deformation behavior of iron based shape memory alloys have been studied. The thermomechanical treatment results in improvement of shape memory effect. This improvement in shape memory effect can be attributed to the formation of lamellar structure of (lambda)/(epsilon) and to an increase in the volume fraction of epsilon martensite (epsilon). It is also found that excessive training may result in the nucleation of bcc martensite (alpha) along with epsilon martensite (epsilon) which degrades the shape memory effect. Also the shape memory effect decreases with the increase in amount of strain, which presumably can be regarded as the effect of increasing tendency of deformation to occur through slip and formation of (alpha) which reduces the reversibility of (epsilon) into (lambda). (author)

  6. Trends Shaping Education 2010

    Science.gov (United States)

    OECD Publishing (NJ3), 2010

    2010-01-01

    "Trends Shaping Education 2010" brings together evidence showing the effects on education of globalisation, social challenges, changes in the workplace, the transformation of childhood, and ICT. To make the content accessible, each trend is presented on a double page, containing an introduction, two charts with brief descriptive text and a set of…

  7. Aerodynamically shaped vortex generators

    DEFF Research Database (Denmark)

    Hansen, Martin Otto Laver; Velte, Clara Marika; Øye, Stig

    2016-01-01

    An aerodynamically shaped vortex generator has been proposed, manufactured and tested in a wind tunnel. The effect on the overall performance when applied on a thick airfoil is an increased lift to drag ratio compared with standard vortex generators. Copyright © 2015 John Wiley & Sons, Ltd....

  8. Shape Up Europe

    DEFF Research Database (Denmark)

    Simovska, Venka; Jensen, Bjarne Bruun

    "Shape Up: a School Community Approach to Influencing the Determinants of Childhood Overweight and Obesity, Lessons Learnt" is a report that aims to provide a synthesis of the project overall evaluation documentation, with a view to systematically review and discuss lessons learnt, and to suggest...

  9. Perceiving animacy from shape.

    Science.gov (United States)

    Schmidt, Filipp; Hegele, Mathias; Fleming, Roland W

    2017-09-01

    Superordinate visual classification-for example, identifying an image as "animal," "plant," or "mineral"-is computationally challenging because radically different items (e.g., "octopus," "dog") must be grouped into a common class ("animal"). It is plausible that learning superordinate categories teaches us not only the membership of particular (familiar) items, but also general features that are shared across class members, aiding us in classifying novel (unfamiliar) items. Here, we investigated visual shape features associated with animate and inanimate classes. One group of participants viewed images of 75 unfamiliar and atypical items and provided separate ratings of how much each image looked like an animal, plant, and mineral. Results show systematic tradeoffs between the ratings, indicating a class-like organization of items. A second group rated each image in terms of 22 midlevel shape features (e.g., "symmetrical," "curved"). The results confirm that superordinate classes are associated with particular shape features (e.g., "animals" generally have high "symmetry" ratings). Moreover, linear discriminant analysis based on the 22-D feature vectors predicts the perceived classes approximately as well as the ground truth classification. This suggests that a generic set of midlevel visual shape features forms the basis for superordinate classification of novel objects along the animacy continuum.

  10. The moon changes shape

    CERN Document Server

    Beaton, Kathryn

    2015-01-01

    "Young children are naturally curious about the world around them. The Moon Changes Shape offers answers to their most compelling questions about the lunar phases. Age-appropriate explanations and appealing photos encourage readers to continue their quest for knowledge. Additional text features and search tools, including a glossary and an index, help students locate information and learn new words."-- Provided by publisher.

  11. Bend me, shape me

    CERN Document Server

    2002-01-01

    A Japanese team has found a way to bend and shape silicon substrates by growing a thin layer of diamond on top. The technique has been proposed as an alternative to mechanical bending, which is currently used to make reflective lenses for X-ray systems and particle physics systems (2 paragraphs).

  12. How life shaped Earth.

    Science.gov (United States)

    Gross, Michael

    2015-10-05

    Earth is much more complex than all the other solar system objects that we know. Thanks to its rich and diverse geology, our planet can offer habitats to a wide range of living species. Emerging insights suggest that this is not just a happy coincidence, but that life itself has in many ways helped to shape the planet.

  13. Attentional-Shaping as a Means to Improve Emotion Perception Deficits in Schizophrenia

    OpenAIRE

    Combs, Dennis R.; Tosheva, Aneta; Penn, David L.; Basso, Michael R.; Wanner, Jill L.; Laib, Kristen

    2008-01-01

    Inability to recognize emotional expressions of others (emotion perception) is one of the most common impairments observed among individuals with schizophrenia. Such deficits presumably contribute much to the social dysfunction characteristic of schizophrenia. This study examined the efficacy of a novel attentional-shaping intervention to improve emotion perception abilities. Sixty participants with schizophrenia were randomly assigned to one of three intervention conditions: 1) attentional-s...

  14. Duality based contact shape optimization

    DEFF Research Database (Denmark)

    Vondrák, Vít; Dostal, Zdenek; Rasmussen, John

    2001-01-01

    An implementation of semi-analytic method for the sensitivity analysis in contact shape optimization without friction is described. This method is then applied to the contact shape optimization.......An implementation of semi-analytic method for the sensitivity analysis in contact shape optimization without friction is described. This method is then applied to the contact shape optimization....

  15. The nuclear waste disaster. A view behind the curtain of the presumably clean nuclear power; Das Atommuell-Desaster. Blicke hinter die Kulissen der angeblich sauberen Atomenergie

    Energy Technology Data Exchange (ETDEWEB)

    Schumacher, Julia; Simon, Armin; Stay, Jochen (comps.)

    2015-04-15

    The brochure on the nuclear waste disaster - a view behind the curtain of the presumably clean nuclear power discusses the following topics: Thuringia and Saxony - radiating landscapes, Gronau - 100.000 tons for eternity, Gundremmingen - nuclear waste records and castor shortage, Brunsbuettel - castor storage facility without licensing, Juelich the pebble bed drama, Karlsruhe - the hall is filled, Obrigheim - radioactive waste for cooking pots, Asse - the ticking bomb, final repositories - an illusion without solution, stop the waste production, Germany - endless nuclear waste.

  16. The burden of presumed tuberculosis in hospitalized children in a resource-limited setting in Papua New Guinea: a prospective observational study.

    Science.gov (United States)

    Watch, Villa; Aipit, Jimmy; Kote-Yarong, Tina; Rero, Allanie; Bolnga, John W; Lufele, Elvin; Laman, Moses

    2017-11-01

    In Papua New Guinea, TB is considered to be a major public health problem, but little is known about the prevalence and prognosis of presumed TB in children. As part of a prospective hospital-based surveillance on the northern coast of mainland Papua New Guinea, the authors investigated the admission prevalence and case fatality rate associated with presumed TB over a 6-year period (2011-2016). All children admitted who were diagnosed with TB were followed-up until discharge or death. Of 8992 paediatric admissions, 734 patients (8.2%) were diagnosed with presumed TB and there were 825 deaths, with TB accounting for 102 (12.4%). Extrapulmonary TB was the final diagnosis in 384 admissions {prevalence 4.3% [384/8992 (95% CI 3.9-4.7)]} with a case fatality rate of 21.4% [82/384 (95% CI 17.4-25.9)]. TB meningitis, disseminated TB and pericardial TB had high case fatality rates of 29.0% (53/183), 28.9% (11/38) and 25% (4/16), respectively. Severe malnutrition was more common in patients with pulmonary compared with extrapulmonary TB (25.4% vs 15.6%; pPapua New Guinea. © The Author 2017. Published by Oxford University Press on behalf of Royal Society of Tropical Medicine and Hygiene. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  17. Nanoreinforced shape memory polyurethane

    Science.gov (United States)

    Richardson, Tara Beth

    Shape memory polymers (SMPs) are functional materials, which find applications in a broad range of temperature sensing elements and biological micro-electro-mechanical systems (MEMS). These polymers are capable of fixing a transient shape and recovering to their original shape after a series of thermo-mechanical treatments. Generally, these materials are thermoplastic segmented polyurethanes composed of soft segments, usually formed by a polyether macroglycol, and hard segments formed from the reaction of a diisocyanate with a low molecular mass diol. The hard segment content is a key parameter to control the final properties of the polymer, such as rubbery plateau modulus, melting point, hardness, and tensile strength. The long flexible soft segment largely controls the low temperature properties, solvent resistance, and weather resistance properties. The morphology and properties of polyurethanes (PU) are greatly influenced by the ratio of hard and soft block components and the average block lengths. However, in some applications, SMPs may not generate enough recovery force to be useful. The reinforcement of SMPs using nanofillers represents a novel approach of enhancing the performance of these materials. The incorporation of these fillers into SMPs can produce performance enhancements (particularly elastic modulus) at small nanoparticle loadings (˜1-2 wt %). An optimal performance of nanofiller-polymer nanocomposites requires uniform dispersion of filler in polymers and good interfacial adhesion. The addition of nanofillers like cellulose nanofibers (CNF), conductive cellulose nanofibers (C-CNF), and carbon nanotubes (CNTs) allows for the production of stiffer materials with deformation capacity comparable to that of the unfilled polymer. Additionally, the use of conductive nanoreinforcements such as C-CNF and CNTs leads to new pathways for actuation of the shape memory effect. During this work, thermoplastic shape memory polyurethanes were synthesized with

  18. Biomedical Shape Memory Polymers

    Directory of Open Access Journals (Sweden)

    SHEN Xue-lin

    2017-07-01

    Full Text Available Shape memory polymers(SMPs are a class of functional "smart" materials that have shown bright prospects in the area of biomedical applications. The novel smart materials with multifunction of biodegradability and biocompatibility can be designed based on their general principle, composition and structure. In this review, the latest process of three typical biodegradable SMPs(poly(lactide acide, poly(ε-caprolactone, polyurethane was summarized. These three SMPs were classified in different structures and discussed, and shape-memory mechanism, recovery rate and fixed rate, response speed was analysed in detail, also, some biomedical applications were presented. Finally, the future development and applications of SMPs are prospected: two-way SMPs and body temperature induced SMPs will be the focus attension by researchers.

  19. Antiferroelectric Shape Memory Ceramics

    Directory of Open Access Journals (Sweden)

    Kenji Uchino

    2016-05-01

    Full Text Available Antiferroelectrics (AFE can exhibit a “shape memory function controllable by electric field”, with huge isotropic volumetric expansion (0.26% associated with the AFE to Ferroelectric (FE phase transformation. Small inverse electric field application can realize the original AFE phase. The response speed is quick (2.5 ms. In the Pb0.99Nb0.02[(Zr0.6Sn0.41-yTiy]0.98O3 (PNZST system, the shape memory function is observed in the intermediate range between high temperature AFE and low temperature FE, or low Ti-concentration AFE and high Ti-concentration FE in the composition. In the AFE multilayer actuators (MLAs, the crack is initiated in the center of a pair of internal electrodes under cyclic electric field, rather than the edge area of the internal electrodes in normal piezoelectric MLAs. The two-sublattice polarization coupling model is proposed to explain: (1 isotropic volume expansion during the AFE-FE transformation; and (2 piezoelectric anisotropy. We introduce latching relays and mechanical clampers as possible unique applications of shape memory ceramics.

  20. Audiometric shape and presbycusis.

    Science.gov (United States)

    Demeester, Kelly; van Wieringen, Astrid; Hendrickx, Jan-jaap; Topsakal, Vedat; Fransen, Erik; van Laer, Lut; Van Camp, Guy; Van de Heyning, Paul

    2009-04-01

    The aim of this study was to describe the prevalence of specific audiogram configurations in a healthy, otologically screened population between 55 and 65 years old. The audiograms of 1147 subjects (549 males and 598 females between 55 and 65 years old) were collected through population registries and classified according to the configuration of hearing loss. Gender and noise/solvent-exposure effects on the prevalence of the different audiogram shapes were determined statistically. In our population 'Flat' audiograms were most dominantly represented (37%) followed by 'High frequency Gently sloping' audiograms (35%) and 'High frequency Steeply sloping' audiograms (27%). 'Low frequency Ascending' audiograms, 'Mid frequency U-shape' audiograms and 'Mid frequency Reverse U-shape' audiograms were very rare (together less than 1%). The 'Flat'-configuration was significantly more common in females, whereas the 'High frequency Steeply sloping'-configuration was more common in males. Exposure to noise and/or solvents did not change this finding. In addition, females with a 'Flat' audiogram had a significantly larger amount of overall hearing loss compared to males. Furthermore, our data reveal a significant association between the prevalence of 'High frequency Steeply sloping' audiograms and the degree of noise/solvent exposure, despite a relatively high proportion of non-exposed subjects showing a 'High frequency Steeply sloping' audiogram as well.

  1. Shape descriptors for mode-shape recognition and model updating

    International Nuclear Information System (INIS)

    Wang, W; Mottershead, J E; Mares, C

    2009-01-01

    The most widely used method for comparing mode shapes from finite elements and experimental measurements is the Modal Assurance Criterion (MAC), which returns a single numerical value and carries no explicit information on shape features. New techniques, based on image processing (IP) and pattern recognition (PR) are described in this paper. The Zernike moment descriptor (ZMD), Fourier descriptor (FD), and wavelet descriptor (WD), presented in this article, are the most popular shape descriptors having properties that include efficiency of expression, robustness to noise, invariance to geometric transformation and rotation, separation of local and global shape features and computational efficiency. The comparison of mode shapes is readily achieved by assembling the shape features of each mode shape into multi-dimensional shape feature vectors (SFVs) and determining the distances separating them.

  2. Current Cigarette Use Among Adults (BRFSS) PDF Slides

    Data.gov (United States)

    U.S. Department of Health & Human Services — Download the current cigarette use among adults slides. These slides are available in PDF and PowerPoint formats. The PowerPoint version can be found at:...

  3. Current Cigarette Use Among Youth (YRBSS) PDF Slides

    Data.gov (United States)

    U.S. Department of Health & Human Services — Download the current cigarette use among youth slides. These slides are available in PDF and PowerPoint formats. The PowerPoint version can be found at:...

  4. How to Create a Web-Ready PDF

    Science.gov (United States)

    Making EPA's PDF documents accessible (by Section 508 standards) and user-friendly includes steps such as adding bookmarks, using electronic conversion rather than scanning pages, and adding metadata.

  5. Excise Tax Rates On Packs Of Cigarettes PDF Slides

    Data.gov (United States)

    U.S. Department of Health & Human Services — Download the current excise tax rates on packs of cigarettes slides. These slides are available in PDF and PowerPoint formats. The PowerPoint version can be found...

  6. Oriented active shape models.

    Science.gov (United States)

    Liu, Jiamin; Udupa, Jayaram K

    2009-04-01

    Active shape models (ASM) are widely employed for recognizing anatomic structures and for delineating them in medical images. In this paper, a novel strategy called oriented active shape models (OASM) is presented in an attempt to overcome the following five limitations of ASM: 1) lower delineation accuracy, 2) the requirement of a large number of landmarks, 3) sensitivity to search range, 4) sensitivity to initialization, and 5) inability to fully exploit the specific information present in the given image to be segmented. OASM effectively combines the rich statistical shape information embodied in ASM with the boundary orientedness property and the globally optimal delineation capability of the live wire methodology of boundary segmentation. The latter characteristics allow live wire to effectively separate an object boundary from other nonobject boundaries with similar properties especially when they come very close in the image domain. The approach leads to a two-level dynamic programming method, wherein the first level corresponds to boundary recognition and the second level corresponds to boundary delineation, and to an effective automatic initialization method. The method outputs a globally optimal boundary that agrees with the shape model if the recognition step is successful in bringing the model close to the boundary in the image. Extensive evaluation experiments have been conducted by utilizing 40 image (magnetic resonance and computed tomography) data sets in each of five different application areas for segmenting breast, liver, bones of the foot, and cervical vertebrae of the spine. Comparisons are made between OASM and ASM based on precision, accuracy, and efficiency of segmentation. Accuracy is assessed using both region-based false positive and false negative measures and boundary-based distance measures. The results indicate the following: 1) The accuracy of segmentation via OASM is considerably better than that of ASM; 2) The number of landmarks

  7. Shaping 3-D boxes

    DEFF Research Database (Denmark)

    Stenholt, Rasmus; Madsen, Claus B.

    2011-01-01

    Enabling users to shape 3-D boxes in immersive virtual environments is a non-trivial problem. In this paper, a new family of techniques for creating rectangular boxes of arbitrary position, orientation, and size is presented and evaluated. These new techniques are based solely on position data......F) docking experiment against an existing technique, which requires the user to perform the rotation and scaling of the box explicitly. The precision of the users' box construction is evaluated by a novel error metric measuring the difference between two boxes. The results of the experiment strongly indicate...

  8. Mast Wake Reduction by Shaping

    National Research Council Canada - National Science Library

    Beauchamp, Charles H

    2005-01-01

    The present invention relates to various mast shapes, in which the mast shapes minimize the production of visible, electro-optic, infrared and radar cross section wake signatures produced by water surface piercing masts...

  9. Pairwise harmonics for shape analysis

    KAUST Repository

    Zheng, Youyi

    2013-07-01

    This paper introduces a simple yet effective shape analysis mechanism for geometry processing. Unlike traditional shape analysis techniques which compute descriptors per surface point up to certain neighborhoods, we introduce a shape analysis framework in which the descriptors are based on pairs of surface points. Such a pairwise analysis approach leads to a new class of shape descriptors that are more global, discriminative, and can effectively capture the variations in the underlying geometry. Specifically, we introduce new shape descriptors based on the isocurves of harmonic functions whose global maximum and minimum occur at the point pair. We show that these shape descriptors can infer shape structures and consistently lead to simpler and more efficient algorithms than the state-of-the-art methods for three applications: intrinsic reflectional symmetry axis computation, matching shape extremities, and simultaneous surface segmentation and skeletonization. © 2012 IEEE.

  10. Mean gust shapes

    Energy Technology Data Exchange (ETDEWEB)

    Larsen, G.C.; Bierbooms, W.; Hansen, K.S.

    2003-12-01

    The gust events described in the IEC-standard are formulated as coherent gusts of an inherent deterministic character, whereas the gusts experienced in real situation are of a stochastic nature with a limited spatial extension. This conceptual difference may cause substantial differences in the load patterns of a wind turbine when a gust event is imposed. Methods exist to embed a gust of a prescribed appearance in a stochastic wind field. The present report deals with a method to derive realistic gust shapes based only on a few stochastic features of the relevant turbulence field. The investigation is limited to investigation of the longitudinal turbulence component, and consequently no attention is paid to wind direction gusts. A theoretical expression, based on level crossing statistics, is proposed for the description of a mean wind speed gust shape. The description also allows for information on the spatial structure of the wind speed gust and relies only on conventional wind field parameters. The theoretical expression is verified by comparison with simulated wind fields as well as with measured wind fields covering a broad range of mean wind speed situations and terrain conditions. The work reported makes part of the project 'Modelling of Extreme Gusts for Design Calculations' (NEWGUST), which is co-funded through JOULEIII on contract no. JOR3-CT98-0239. (au)

  11. Issues in Biological Shape Modelling

    DEFF Research Database (Denmark)

    Hilger, Klaus Baggesen

    This talk reflects parts of the current research at informatics and Mathematical Modelling at the Technical University of Denmark within biological shape modelling. We illustrate a series of generalizations, modifications, and applications of the elements of constructing models of shape or appear......This talk reflects parts of the current research at informatics and Mathematical Modelling at the Technical University of Denmark within biological shape modelling. We illustrate a series of generalizations, modifications, and applications of the elements of constructing models of shape...

  12. 3D PDF - a means of public access to geological 3D - objects, using the example of GTA3D

    Science.gov (United States)

    Slaby, Mark-Fabian; Reimann, Rüdiger

    2013-04-01

    In geology, 3D modeling has become very important. In the past, two-dimensional data such as isolines, drilling profiles, or cross-sections based on those, were used to illustrate the subsurface geology, whereas now, we can create complex digital 3D models. These models are produced with special software, such as GOCAD ®. The models can be viewed, only through the software used to create them, or through viewers available for free. The platform-independent PDF (Portable Document Format), enforced by Adobe, has found a wide distribution. This format has constantly evolved over time. Meanwhile, it is possible to display CAD data in an Adobe 3D PDF file with the free Adobe Reader (version 7). In a 3D PDF, a 3D model is freely rotatable and can be assembled from a plurality of objects, which can thus be viewed from all directions on their own. In addition, it is possible to create moveable cross-sections (profiles), and to assign transparency to the objects. Based on industry-standard CAD software, 3D PDFs can be generated from a large number of formats, or even be exported directly from this software. In geoinformatics, different approaches to creating 3D PDFs exist. The intent of the Authority for Mining, Energy and Geology to allow free access to the models of the Geotectonic Atlas (GTA3D), could not be realized with standard software solutions. A specially designed code converts the 3D objects to VRML (Virtual Reality Modeling Language). VRML is one of the few formats that allow using image files (maps) as textures, and to represent colors and shapes correctly. The files were merged in Acrobat X Pro, and a 3D PDF was generated subsequently. A topographic map, a display of geographic directions and horizontal and vertical scales help to facilitate the use.

  13. Sensitivity to Pigment-Dispersing Factor (PDF) Is Cell-Type Specific among PDF-Expressing Circadian Clock Neurons in the Madeira Cockroach.

    Science.gov (United States)

    Gestrich, Julia; Giese, Maria; Shen, Wen; Zhang, Yi; Voss, Alexandra; Popov, Cyril; Stengl, Monika; Wei, HongYing

    2018-02-01

    Transplantation studies have pinpointed the circadian clock of the Madeira cockroach to the accessory medulla (AME) of the brain's optic lobes. The AME is innervated by approximately 240 adjacent neuropeptidergic neurons, including 12 pigment-dispersing factor (PDF)-expressing neurons anterior to the AME (aPDFMEs). Four of the aPDFMEs project contralaterally, controlling locomotor activity rhythms of the night-active cockroach. The present in vitro Ca 2+ imaging analysis focuses on contralaterally projecting AME neurons and their responses to PDF, GABA, and acetylcholine (ACh). First, rhodamine-dextran backfills from the contralateral optic stalk identified contralaterally projecting AME neurons, which were then dispersed in primary cell cultures. After characterization of PDF, GABA, and ACh responses, PDF immunocytochemistry identified ipsilaterally and contralaterally projecting PDFMEs. All PDF-sensitive clock neurons, PDF-immunoreactive clock neurons, and the majority of ipsilaterally and contralaterally projecting cells were excited by ACh. GABA inhibited all PDF-expressing clock neurons, and about half of other ipsilaterally projecting and most contralaterally projecting clock neurons. For the first time, we identified PDF autoreceptors in PDF-secreting cockroach circadian pacemakers. The medium-sized aPDFMEs and all other contralaterally projecting PDF-sensitive clock cells were inhibited by PDF. The ipsilaterally remaining small PDF-sensitive clock cells were activated by PDF. Only the largest aPDFME did not express PDF autoreceptors. We hypothesize that opposing PDF signaling generates 2 different ensembles of clock cells with antiphasic activity, regulating and maintaining a constant phase relationship between rest and activity cycles of the night-active cockroach.

  14. Ferromagnetic shape memory materials

    Science.gov (United States)

    Tickle, Robert Jay

    Ferromagnetic shape memory materials are a new class of active materials which combine the properties of ferromagnetism with those of a diffusionless, reversible martensitic transformation. These materials have been the subject of recent study due to the unusually large magnetostriction exhibited in the martensitic phase. In this thesis we report the results of experiments which characterize the magnetic and magnetomechanical properties of both austenitic and martensitic phases of ferromagnetic shape memory material Ni2MnGa. In the high temperature cubic phase, anisotropy and magnetostriction constants are determined for a range of temperatures from 50°C down to the transformation temperature, with room temperature values of K1 = 2.7 +/- 104 ergs/cm3 and lambda100 = -145 muepsilon. In the low temperature tetragonal phase, the phenomenon of field-induced variant rearrangement is shown to produce anomalous results when traditional techniques for determining anisotropy and magnetostriction properties are employed. The requirement of single variant specimen microstructure is explained, and experiments performed on such a specimen confirm a uniaxial anisotropy within each martensitic variant with anisotropy constant Ku = 2.45 x 106 ergs/cm3 and a magnetostriction constant of lambdasv = -288 +/- 73 muepsilon. A series of magnetomechanical experiments investigate the effects of microstructure bias, repeated field cycling, varying field ramp rate, applied load, and specimen geometry on the variant rearrangement phenomenon in the martensitic phase. In general, the field-induced strain is found to be a function of the variant microstructure. Experiments in which the initial microstructure is biased towards a single variant state with an applied load generate one-time strains of 4.3%, while those performed with a constant bias stress of 5 MPa generate reversible strains of 0.5% over a period of 50 cycles. An increase in the applied field ramp rate is shown to reduce the

  15. Shape memory heat engines

    Science.gov (United States)

    Salzbrenner, R.

    1984-06-01

    The mechanical shape memory effect associated with a thermoelastic martensitic transformation can be used to convert heat directly into mechanical work. Laboratory simulation of two types of heat engine cycles (Stirling and Ericsson) has been performed to measure the amount of work available/cycle in a Ni-45 at. pct Ti alloy. Tensile deformations at ambient temperature induced martensite, while a subsequent increase in temperature caused a reversion to the parent phase during which a load was carried through the strain recovery (i.e., work was accomplished). The amount of heat necessary to carry the engines through a cycle was estimated from calorimeter measurements and the work performed/cycle. The measured efficiency of the system tested reached a maximum of 1.4 percent, which was well below the theoretical (Carnot) maximum efficiency of 35.6 percent.

  16. Shape Bonding method

    Science.gov (United States)

    Pontius, James T. (Inventor)

    2010-01-01

    The present invention is directed to a method of bonding at least two surfaces together. The methods step of the present invention include applying a strip of adhesive to a first surface along a predefined outer boundary of a bond area and thereby defining a remaining open area there within. A second surface, or gusset plate, is affixed onto the adhesive before the adhesive cures. The strip of adhesive is allowed to cure and then a second amount of adhesive is applied to cover the remaining open area and substantially fill a void between said first and second surfaces about said bond area. A stencil may be used to precisely apply the strip of adhesive. When the strip cures, it acts as a dam to prevent overflow of the subsequent application of adhesive to undesired areas. The method results in a precise bond area free of undesired shapes and of a preferred profile which eliminate the drawbacks of the prior art bonds.

  17. Boosted Higgs Shapes

    CERN Document Server

    Schlaffer, Matthias; Takeuchi, Michihisa; Weiler, Andreas; Wymant, Chris

    2014-01-01

    The inclusive Higgs production rate through gluon fusion has been measured to be in agreement with the Standard Model (SM). We show that even if the inclusive Higgs production rate is very SM-like, a precise determination of the boosted Higgs transverse momentum shape offers the opportunity to see effects of natural new physics. These measurements are generically motivated by effective field theory arguments and specifically in extensions of the SM with a natural weak scale, like composite Higgs models and natural supersymmetry. We show in detail how a measurement at high transverse momentum of $H\\to 2\\ell+\\mathbf{p}\\!\\!/_T$ via $H\\to \\tau\\tau$ and $H\\to WW^*$ could be performed and demonstrate that it offers a compelling alternative to the $t\\bar t H$ channel. We discuss the sensitivity to new physics in the most challenging scenario of an exactly SM-like inclusive Higgs cross-section.

  18. Digital pulse shape discrimination

    International Nuclear Information System (INIS)

    Miller, L. F.; Preston, J.; Pozzi, S.; Flaska, M.; Neal, J.

    2007-01-01

    Pulse-shape discrimination (PSD) has been utilised for about 40 years as a method to obtain estimates for dose in mixed neutron and photon fields. Digitizers that operate close to GHz are currently available at a reasonable cost, and they can be used to directly sample signals from photomultiplier tubes. This permits one to perform digital PSD rather than the traditional, and well-established, analogous techniques. One issue that complicates PSD for neutrons in mixed fields is that the light output characteristics of typical scintillators available for PSD, such as BC501A, vary as a function of energy deposited in the detector. This behaviour is more easily accommodated with digital processing of signals than with analogous signal processing. Results illustrate the effectiveness of digital PSD. (authors)

  19. SHAPE Selection (SHAPES) enrich for RNA structure signal in SHAPE sequencing-based probing data.

    Science.gov (United States)

    Poulsen, Line Dahl; Kielpinski, Lukasz Jan; Salama, Sofie R; Krogh, Anders; Vinther, Jeppe

    2015-05-01

    Selective 2' Hydroxyl Acylation analyzed by Primer Extension (SHAPE) is an accurate method for probing of RNA secondary structure. In existing SHAPE methods, the SHAPE probing signal is normalized to a no-reagent control to correct for the background caused by premature termination of the reverse transcriptase. Here, we introduce a SHAPE Selection (SHAPES) reagent, N-propanone isatoic anhydride (NPIA), which retains the ability of SHAPE reagents to accurately probe RNA structure, but also allows covalent coupling between the SHAPES reagent and a biotin molecule. We demonstrate that SHAPES-based selection of cDNA-RNA hybrids on streptavidin beads effectively removes the large majority of background signal present in SHAPE probing data and that sequencing-based SHAPES data contain the same amount of RNA structure data as regular sequencing-based SHAPE data obtained through normalization to a no-reagent control. Moreover, the selection efficiently enriches for probed RNAs, suggesting that the SHAPES strategy will be useful for applications with high-background and low-probing signal such as in vivo RNA structure probing. © 2015 Poulsen et al.; Published by Cold Spring Harbor Laboratory Press for the RNA Society.

  20. PDF text classification to leverage information extraction from publication reports.

    Science.gov (United States)

    Bui, Duy Duc An; Del Fiol, Guilherme; Jonnalagadda, Siddhartha

    2016-06-01

    Data extraction from original study reports is a time-consuming, error-prone process in systematic review development. Information extraction (IE) systems have the potential to assist humans in the extraction task, however majority of IE systems were not designed to work on Portable Document Format (PDF) document, an important and common extraction source for systematic review. In a PDF document, narrative content is often mixed with publication metadata or semi-structured text, which add challenges to the underlining natural language processing algorithm. Our goal is to categorize PDF texts for strategic use by IE systems. We used an open-source tool to extract raw texts from a PDF document and developed a text classification algorithm that follows a multi-pass sieve framework to automatically classify PDF text snippets (for brevity, texts) into TITLE, ABSTRACT, BODYTEXT, SEMISTRUCTURE, and METADATA categories. To validate the algorithm, we developed a gold standard of PDF reports that were included in the development of previous systematic reviews by the Cochrane Collaboration. In a two-step procedure, we evaluated (1) classification performance, and compared it with machine learning classifier, and (2) the effects of the algorithm on an IE system that extracts clinical outcome mentions. The multi-pass sieve algorithm achieved an accuracy of 92.6%, which was 9.7% (pmachine learning classifier that used a logistic regression algorithm. F-measure improvements were observed in the classification of TITLE (+15.6%), ABSTRACT (+54.2%), BODYTEXT (+3.7%), SEMISTRUCTURE (+34%), and MEDADATA (+14.2%). In addition, use of the algorithm to filter semi-structured texts and publication metadata improved performance of the outcome extraction system (F-measure +4.1%, p=0.002). It also reduced of number of sentences to be processed by 44.9% (pclassification is an important prerequisite step to leverage information extraction from PDF documents. Copyright © 2016 Elsevier Inc. All

  1. PDF sensitivity studies from ATLAS measurements

    CERN Document Server

    Hanna, Remie; The ATLAS collaboration

    2015-01-01

    Several measurements performed by the ATLAS collaboration are either useful to constrain the proton structure or are affected by its associated uncertainties. The strange-quark density is rather poorly known at low x. Measurements of the W+c production and the inclusive W and Z differential cross sections are found to constrain the strange-quark density. Drell-Yan cross section measurements performed above and below the Z peak region have a different sensitivity to parton flavour, parton momentum fraction x and scale Q compared to measurements on the Z peak and can also be used to constrain the photon content of the proton. Measurements of the inclusive jet and photon cross sections are standard candles and can be useful to constrain the medium and high x gluon densities. Precision electroweak studies performed by ATLAS can be limited by the current knowledge on the proton structure. Among those are the measurement of the effective weak mixing angle and the mass of the W boson. Dedicated PDF studies were perf...

  2. Surface shape memory in polymers

    Science.gov (United States)

    Mather, Patrick

    2012-02-01

    Many crosslinked polymers exhibit a shape memory effect wherein a permanent shape can be prescribed during crosslinking and arbitrary temporary shapes may be set through network chain immobilization. Researchers have extensively investigated such shape memory polymers in bulk form (bars, films, foams), revealing a multitude of approaches. Applications abound for such materials and a significant fraction of the studies in this area concern application-specific characterization. Recently, we have turned our attention to surface shape memory in polymers as a means to miniaturization of the effect, largely motivated to study the interaction of biological cells with shape memory polymers. In this presentation, attention will be given to several approaches we have taken to prepare and study surface shape memory phenomenon. First, a reversible embossing study involving a glassy, crosslinked shape memory material will be presented. Here, the permanent shape was flat while the temporary state consisted of embossed parallel groves. Further the fixing mechanism was vitrification, with Tg adjusted to accommodate experiments with cells. We observed that the orientation and spreading of adherent cells could be triggered to change by the topographical switch from grooved to flat. Second, a functionally graded shape memory polymer will be presented, the grading being a variation in glass transition temperature in one direction along the length of films. Characterization of the shape fixing and recovery of such films utilized an indentation technique that, along with polarizing microscopy, allowed visualization of stress distribution in proximity to the indentations. Finally, very recent research concerning shape memory induced wrinkle formation on polymer surfaces will be presented. A transformation from smooth to wrinkled surfaces at physiological temperatures has been observed to have a dramatic effect on the behavior of adherent cells. A look to the future in research and

  3. Modeling the shape memory effect of shape memory polymer

    Science.gov (United States)

    Zhou, Bo; Liu, Yanju; Wang, Zhenqing; Leng, Jin-Song

    2009-07-01

    Dynamic mechanical analysis (DMA) tests are conducted on the styrene-based shape memory polymer (SMP) to investigate its state transition behaviors. Tensile tests at various constant temperatures are carried out to reveal the stressstrain- temperature relationship of the styrene-based SMP. A new mechanical constitutive equation is developed to describe the stress-strain-temperature relationship of the styrene-based SMP. Numerical calculations illustrate the proposed theory well describes the thermo-mechanical cycle of shape memory of styrene-based SMP, such as deformation at high temperature, shape fixity, unloading at low temperature and shape recovery.

  4. Vaccines: Shaping global health.

    Science.gov (United States)

    Pagliusi, Sonia; Ting, Ching-Chia; Lobos, Fernando

    2017-03-14

    The Developing Countries Vaccine Manufacturers' Network (DCVMN) gathered leaders in immunization programs, vaccine manufacturing, representatives of the Argentinean Health Authorities and Pan American Health Organization, among other global health stakeholders, for its 17th Annual General Meeting in Buenos Aires, to reflect on how vaccines are shaping global health. Polio eradication and elimination of measles and rubella from the Americas is a result of successful collaboration, made possible by timely supply of affordable vaccines. After decades of intense competition for high-value markets, collaboration with developing countries has become critical, and involvement of multiple manufacturers as well as public- and private-sector investments are essential, for developing new vaccines against emerging infectious diseases. The recent Zika virus outbreak and the accelerated Ebola vaccine development exemplify the need for international partnerships to combat infectious diseases. A new player, Coalition for Epidemic Preparedness Innovations (CEPI) has made its entrance in the global health community, aiming to stimulate research preparedness against emerging infections. Face-to-face panel discussions facilitated the dialogue around challenges, such as risks of viability to vaccine development and regulatory convergence, to improve access to sustainable vaccine supply. It was discussed that joint efforts to optimizing regulatory pathways in developing countries, reducing registration time by up to 50%, are required. Outbreaks of emerging infections and the global Polio eradication and containment challenges are reminders of the importance of vaccines' access, and of the importance of new public-private partnerships. Copyright © 2017.

  5. Combined Shape and Topology Optimization

    DEFF Research Database (Denmark)

    Christiansen, Asger Nyman

    Shape and topology optimization seeks to compute the optimal shape and topology of a structure such that one or more properties, for example stiffness, balance or volume, are improved. The goal of the thesis is to develop a method for shape and topology optimization which uses the Deformable...... Simplicial Complex (DSC) method. Consequently, we present a novel method which combines current shape and topology optimization methods. This method represents the surface of the structure explicitly and discretizes the structure into non-overlapping elements, i.e. a simplicial complex. An explicit surface...... representation usually limits the optimization to minor shape changes. However, the DSC method uses a single explicit representation and still allows for large shape and topology changes. It does so by constantly applying a set of mesh operations during deformations of the structure. Using an explicit instead...

  6. Shape resonances in molecular fields

    International Nuclear Information System (INIS)

    Dehmer, J.L.

    1984-01-01

    A shape resonance is a quasibound state in which a particle is temporarily trapped by a potential barrier (i.e., the shape of the potential), through which it may eventually tunnel and escape. This simple mechanism plays a prominent role in a variety of excitation processes in molecules, ranging from vibrational excitation by slow electrons to ionization of deep core levels by x-rays. Moreover, their localized nature makes shape resonances a unifying link between otherwise dissimilar circumstances. One example is the close connection between shape resonances in electron-molecule scattering and in molecular photoionization. Another is the frequent persistence of free-molecule shape resonant behavior upon adsorption on a surface or condensation into a molecular solid. The main focus of this article is a discussion of the basic properties of shape resonances in molecular fields, illustrated by the more transparent examples studied over the last ten years. Other aspects to be discussed are vibrational effects of shape resonances, connections between shape resonances in different physical settings, and examples of shape resonant behavior in more complex cases, which form current challenges in this field

  7. Women in Shape Modeling Workshop

    CERN Document Server

    Tari, Sibel

    2015-01-01

    Presenting the latest research from the growing field of mathematical shape analysis, this volume is comprised of the collaborations of participants of the Women in Shape Modeling (WiSh) workshop, held at UCLA's Institute for Pure and Applied Mathematics in July 2013. Topics include: Simultaneous spectral and spatial analysis of shape Dimensionality reduction and visualization of data in tree-spaces, such as classes of anatomical trees like airways and blood vessels Geometric shape segmentation, exploring shape segmentation from a Gestalt perspective, using information from the Blum medial axis of edge fragments in an image Representing and editing self-similar details on 3D shapes, studying shape deformation and editing techniques Several chapters in the book directly address the problem of continuous measures of context-dependent nearness and right shape models. Medical and biological applications have been a major source of motivation in shape research, and key topics are examined here in detail. All...

  8. Shape optimization in 2D contact problems with given friction and a solution-dependent coefficient of friction

    Czech Academy of Sciences Publication Activity Database

    Haslinger, J.; Outrata, Jiří; Pathó, R.

    2012-01-01

    Roč. 20, č. 1 (2012), s. 31-59 ISSN 1877-0533 R&D Projects: GA AV ČR IAA100750802 Institutional research plan: CEZ:AV0Z10750506 Institutional support: RVO:67985556 Keywords : shape optimization * Signorini problem * model with given frinction * solution-dependent coefficient of friction * mathematical probrams with equilibrium constraints Subject RIV: BA - General Mathematics Impact factor: 1.036, year: 2012 http://library.utia.cas.cz/separaty/2012/MTR/outrata-shape optimization in 2d contact problems with given friction and a solution-dependent coefficient of friction .pdf

  9. Outcomes for dogs with primary hyperparathyroidism following treatment with percutaneous ultrasound-guided ethanol ablation of presumed functional parathyroid nodules: 27 cases (2008-2011).

    Science.gov (United States)

    Guttin, Talia; Knox, Van W; Diroff, Jeremy S

    2015-10-01

    To describe outcomes for dogs with primary hyperparathyroidism following treatment with percutaneous ultrasound-guided ethanol ablation of presumed functional parathyroid nodules. Retrospective case series. 24 dogs with primary hyperparathyroidism that underwent 27 ultrasound-guided ethanol ablation procedures of presumed functional parathyroid nodules identified by cervical ultrasonography. Dogs were anesthetized for each procedure. For each nodule, 95% ethanol was injected into the center with ultrasound guidance (volume injected calculated on the basis of ultrasonographic measurements). The interval from treatment to resolution of hypercalcemia, complications, and follow-up clinicopathologic data were recorded. 5 procedures involved simultaneous treatment of 2 nodules. Three dogs underwent a second treatment because of initial treatment failure or development of another nodule. Hypercalcemia resolved after 23 of 27 (85%) procedures. In those 23 treatments, 22 (96%) had resolution of hypercalcemia within 72 hours after treatment. Hypocalcemia was detected in 6 different dogs at 2 (1 dog), 7 (3 dogs), 14 (1 dog), and 21 (1 dog) days after treatment; 5 of these dogs had mild transient hypocalcemia and 1 developed clinical signs requiring calcium supplementation. Although there were no periprocedural adverse effects, 2 dogs had delayed adverse effects; the overall rate of complications (including delayed adverse events and clinical hypocalcemia) was 11.1%. Long-term follow-up data indicated sustained normocalcemia in 17 of 19 dogs. Results suggested that percutaneous ultrasound-guided ethanol ablation of functional parathyroid nodules may be an effective treatment for primary hyperparathyroidism of dogs, with short duration of anesthesia, minimal complications, and low risk for hypocalcemia.

  10. How does the interaction of presumed timing, location and extent of the underlying brain lesion relate to upper limb function in children with unilateral cerebral palsy?

    Science.gov (United States)

    Mailleux, Lisa; Klingels, Katrijn; Fiori, Simona; Simon-Martinez, Cristina; Demaerel, Philippe; Locus, Marlies; Fosseprez, Eva; Boyd, Roslyn N; Guzzetta, Andrea; Ortibus, Els; Feys, Hilde

    2017-09-01

    Upper limb (UL) function in children with unilateral cerebral palsy (CP) vary largely depending on presumed timing, location and extent of brain lesions. These factors might exhibit a complex interaction and the combined prognostic value warrants further investigation. This study aimed to map lesion location and extent and assessed whether these differ according to presumed lesion timing and to determine the impact of structural brain damage on UL function within different lesion timing groups. Seventy-three children with unilateral CP (mean age 10 years 2 months) were classified according to lesion timing: malformations (N = 2), periventricular white matter (PWM, N = 42) and cortical and deep grey matter (CDGM, N = 29) lesions. Neuroanatomical damage was scored using a semi-quantitative MRI scale. UL function was assessed at body function and activity level. CDGM lesions were more pronounced compared to PWM lesions (p = 0.0003). Neuroanatomical scores were correlated with a higher degree to UL function in the CDGM group (r s  = -0.39 to r s  = -0.84) compared to the PWM group (r rb  = -0.42 to r s  = -0.61). Regression analysis found lesion location and extent to explain 75% and 65% (p < 0.02) respectively, of the variance in AHA performance in the CDGM group, but only 24% and 12% (p < 0.03) in the PWM group. In the CDGM group, lesion location and extent seems to impact more on UL function compared to the PWM group. In children with PWM lesions, other factors like corticospinal tract (re)organization and structural connectivity may play an additional role. Copyright © 2017 European Paediatric Neurology Society. All rights reserved.

  11. Reference and PDF-manager software: complexities, support and workflow.

    Science.gov (United States)

    Mead, Thomas L; Berryman, Donna R

    2010-10-01

    In the past, librarians taught reference management by training library users to use established software programs such as RefWorks or EndNote. In today's environment, there is a proliferation of Web-based programs that are being used by library clientele that offer a new twist on the well-known reference management programs. Basically, these new programs are PDF-manager software (e.g., Mendeley or Papers). Librarians are faced with new questions, issues, and concerns, given the new workflows and pathways that these PDF-manager programs present. This article takes a look at some of those.

  12. Young Children's Concepts of Shape.

    Science.gov (United States)

    Clements, Douglas H.; Swaminathan, Sudha; Hannibal, Mary Anne Zeitler; Sarama, Julie

    1999-01-01

    Investigates, by conducting individual clinical interviews of 97 children ages 3 to 6, the criteria preschool children use to distinguish members of a class of shapes from other figures, emphasizing identification and descriptions of shapes and reasons for these identifications. Concludes that young children initially form schemas on the basis of…

  13. Functional and shape data analysis

    CERN Document Server

    Srivastava, Anuj

    2016-01-01

    This textbook for courses on function data analysis and shape data analysis describes how to define, compare, and mathematically represent shapes, with a focus on statistical modeling and inference. It is aimed at graduate students in analysis in statistics, engineering, applied mathematics, neuroscience, biology, bioinformatics, and other related areas. The interdisciplinary nature of the broad range of ideas covered—from introductory theory to algorithmic implementations and some statistical case studies—is meant to familiarize graduate students with an array of tools that are relevant in developing computational solutions for shape and related analyses. These tools, gleaned from geometry, algebra, statistics, and computational science, are traditionally scattered across different courses, departments, and disciplines; Functional and Shape Data Analysis offers a unified, comprehensive solution by integrating the registration problem into shape analysis, better preparing graduate students for handling fu...

  14. Pileup subtraction for jet shapes

    CERN Document Server

    Soyez, Gregory; Kim, Jihun; Dutta, Souvik; Cacciari, Matteo

    2013-01-01

    Jet shapes have the potential to play a role in many LHC analyses, for example in quark-gluon discrimination or jet substructure analyses for hadronic decays of boosted heavy objects. Most shapes, however, are significantly affected by pileup. We introduce a general method to correct for pileup effects in shapes, which acts event-by-event and jet-by-jet, and accounts also for hadron masses. It involves a numerical determination, for each jet, of a given shape's susceptibility to pileup. Together with existing techniques for determining the level of pileup, this then enables an extrapolation to zero pileup. The method can be used for a wide range of jet shapes and we show its successful application in the context of quark/gluon discrimination and top-tagging.

  15. Shape Optimization in Contact Problems with Coulomb Friction and a Solution-Dependent Friction Coefficient

    Czech Academy of Sciences Publication Activity Database

    Beremlijski, P.; Outrata, Jiří; Haslinger, Jaroslav; Pathó, R.

    2014-01-01

    Roč. 52, č. 5 (2014), s. 3371-3400 ISSN 0363-0129 R&D Projects: GA ČR(CZ) GAP201/12/0671 Grant - others:GA MŠK(CZ) CZ.1.05/1.1.00/02.0070; GA MŠK(CZ) CZ.1.07/2.3.00/20.0070 Institutional support: RVO:67985556 ; RVO:68145535 Keywords : shape optimization * contact problems * Coulomb friction * solution-dependent coefficient of friction * mathematical programs with equilibrium constraints Subject RIV: BA - General Mathematics Impact factor: 1.463, year: 2014 http://library.utia.cas.cz/separaty/2014/MTR/outrata-0434234.pdf

  16. Snout shape in extant ruminants.

    Directory of Open Access Journals (Sweden)

    Jonathan P Tennant

    Full Text Available Snout shape is a prominent aspect of herbivore feeding ecology, interacting with both forage selectivity and intake rate. Previous investigations have suggested ruminant feeding styles can be discriminated via snout shape, with grazing and browsing species characterised by 'blunt' and 'pointed' snouts respectively, often with specification of an 'intermediate' sub-grouping to represent ambiguous feeding styles and/or morphologies. Snout shape morphology is analysed here using a geometric morphometric approach to compare the two-dimensional profiles of the premaxilla in ventral aspect for a large sample of modern ruminant species, for which feeding modes are known from secondary criteria. Results suggest that, when browsing and grazing ruminants are classified ecologically based on a range of feeding style indicators, they cannot be discriminated unambiguously on the basis of snout profile shape alone. Profile shapes in our sample form a continuum with substantial overlap between groupings and a diverse range of morphologies. Nevertheless, we obtained an 83.8 percent ratio of correct post hoc feeding style categorisations based on the proximity of projected profile shapes to group centroids in the discriminant space. Accordingly, this procedure for identifying species whose feeding strategy is 'unknown' can be used with a reasonable degree of confidence, especially if backed-up by additional information. Based on these results we also refine the definitions of snout shape varieties, taking advantage of the descriptive power that geometric morphometrics offers to characterize the morphological disparities observed. The shape variance exhibited by both browsing and grazing ruminants corresponds strongly to body mass, providing further evidence for an interaction between snout shape, feeding style, and body size evolution. Finally, by exploring the role of phylogenetic similarity in snout shape, we find a slight increase in successful categorisation

  17. A theory of shape identification

    CERN Document Server

    Cao, Frédéric; Morel, Jean-Michel; Musé, Pablo; Sur, Frédéric

    2008-01-01

    Recent years have seen dramatic progress in shape recognition algorithms applied to ever-growing image databases. They have been applied to image stitching, stereo vision, image mosaics, solid object recognition and video or web image retrieval. More fundamentally, the ability of humans and animals to detect and recognize shapes is one of the enigmas of perception. The book describes a complete method that starts from a query image and an image database and yields a list of the images in the database containing shapes present in the query image. A false alarm number is associated to each detection. Many experiments will show that familiar simple shapes or images can reliably be identified with false alarm numbers ranging from 10-5 to less than 10-300. Technically speaking, there are two main issues. The first is extracting invariant shape descriptors from digital images. The second is deciding whether two shape descriptors are identifiable as the same shape or not. A perceptual principle, the Helmholtz princi...

  18. Open Data Poster for Open Access Week - PDF file

    OpenAIRE

    Briney, Kristin

    2013-01-01

    .pdf version of the Open Data/Open Access Week poster.   Illustrator version: http://figshare.com/articles/Open_Data_poster_for_Open_Access_Week/828596 Combined fileset here: http://figshare.com/articles/Open_Data_Poster_for_Open_Access_Week/828597

  19. 807.pdf | 25mar2011 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; 25mar2011; 807.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Summer Research Fellowship Programme 2018 · Focus Area Science Technology Summer Fellowship ...

  20. 1609.pdf | dec102000 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; dec102000; 1609.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Ethical Guidelines and Procedures document. Posted on 17 January 2017. A revised version of the ...

  1. 727.pdf | mar102006 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; mar102006; 727.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Ethical Guidelines and Procedures document. Posted on 17 January 2017. A revised version of the ...

  2. 1317.pdf | oct2012 | jess | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jess; oct2012; 1317.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India on ...

  3. Jha.pdf | jul252000 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; jul252000; Jha.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India ...

  4. 1742.pdf | nov252005 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; nov252005; 1742.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India ...

  5. 154.pdf | 25jan2011 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; 25jan2011; 154.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Ethical Guidelines and Procedures document. Posted on 17 January 2017. A revised version of the ...

  6. 968.pdf | apr102007 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; apr102007; 968.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India ...

  7. 1610.pdf | 10jun2011 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; 10jun2011; 1610.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India ...

  8. 1335.pdf | may252007 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; may252007; 1335.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. 83rd Annual Meeting. Posted on 25 October 2017. 3 - 5 November 2017 at North-Eastern Hill University, ...

  9. APFEL : A PDF Evolution Library with QED corrections

    NARCIS (Netherlands)

    Bertone, Valerio; Carrazza, Stefano; Rojo, Juan

    Quantum electrodynamics and electroweak corrections are important ingredients for many theoretical predictions at the LHC. This paper documents APFEL, a new PDF evolution package that allows for the first time to perform DGLAP evolution up to NNLO in QCD and to LO in QED, in the

  10. airpollution.pdf | aug10 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; aug10; airpollution.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Associates – 2017. Posted on 30 August 2017. Click here to see the list · 28th Mid Year Meeting.

  11. 1605.pdf | 10jun2011 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; 10jun2011; 1605.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of ...

  12. 838.pdf | mar252006 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; mar252006; 838.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Summer Research Fellowship Programme 2018. Posted on 16 December 2017. REGISTRATIONS ...

  13. 1336.pdf | jun102002 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; jun102002; 1336.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India ...

  14. 1087.pdf | may102001 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; may102001; 1087.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of ...

  15. 1084.pdf | 25oct2010 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; 25oct2010; 1084.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Associates – 2017. Posted on 30 August 2017. Click here to see the list · 28th Mid Year Meeting.

  16. 252.pdf | aug102001 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

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  17. molweight.pdf | chemistry | resources | sci ed | initiat | Indian ...

    Indian Academy of Sciences (India)

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  18. Conformations.pdf | chemistry | resources | sci ed | initiat | Indian ...

    Indian Academy of Sciences (India)

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  19. Mol weight.pdf | chemistry | resources | sci ed | initiat | Indian ...

    Indian Academy of Sciences (India)

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  20. 0090.pdf | 12 | 087 | pram | Volumes | public | Indian Academy of ...

    Indian Academy of Sciences (India)

    Home; public; Volumes; pram; 087; 12; 0090.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science ...

  1. 1383.pdf | may252007 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; may252007; 1383.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of ...

  2. Ultradian rhythm unmasked in the Pdf clock mutant of Drosophila

    Indian Academy of Sciences (India)

    2014-07-20

    Jul 20, 2014 ... temperature compensated. Our results suggest that Drosophila has an endogenous ultradian oscillator that is masked by circadian rhythmic behaviours. [Seki Y and Tanimura T 2014 Ultradian rhythm unmasked in the Pdf clock mutant of Drosophila. J. Biosci. 39 585-594]. DOI 10.1007/s12038-014-9450-z.

  3. 44.pdf | jul102004 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; jul102004; 44.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India on ...

  4. 595.pdf | jun2012 | jess | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jess; jun2012; 595.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India on the ...

  5. jsr0602.pdf | jun2007 | jessci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jessci; jun2007; jsr0602.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India ...

  6. jess32.pdf | dec2008 | jess | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jess; dec2008; jess32.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India on ...

  7. esb1589.pdf | aug2005 | jessci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jessci; aug2005; esb1589.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Summer Research Fellowship Programme 2018 · Focus Area Science Technology Summer Fellowship ...

  8. 101.pdf | feb2009 | jess | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jess; feb2009; 101.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India on the ...

  9. CHAKRA.pdf | jun2005 | jess | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jess; jun2005; CHAKRA.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India ...

  10. 507.pdf | feb252008 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; feb252008; 507.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Summer Research Fellowship Programme 2018. Dates Extended To 7 December 2017. Register here ...

  11. Edgeworth Expansion Based Model for the Convolutional Noise pdf

    Directory of Open Access Journals (Sweden)

    Yonatan Rivlin

    2014-01-01

    Full Text Available Recently, the Edgeworth expansion up to order 4 was used to represent the convolutional noise probability density function (pdf in the conditional expectation calculations where the source pdf was modeled with the maximum entropy density approximation technique. However, the applied Lagrange multipliers were not the appropriate ones for the chosen model for the convolutional noise pdf. In this paper we use the Edgeworth expansion up to order 4 and up to order 6 to model the convolutional noise pdf. We derive the appropriate Lagrange multipliers, thus obtaining new closed-form approximated expressions for the conditional expectation and mean square error (MSE as a byproduct. Simulation results indicate hardly any equalization improvement with Edgeworth expansion up to order 4 when using optimal Lagrange multipliers over a nonoptimal set. In addition, there is no justification for using the Edgeworth expansion up to order 6 over the Edgeworth expansion up to order 4 for the 16QAM and easy channel case. However, Edgeworth expansion up to order 6 leads to improved equalization performance compared to the Edgeworth expansion up to order 4 for the 16QAM and hard channel case as well as for the case where the 64QAM is sent via an easy channel.

  12. 1537.pdf | nov102005 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; nov102005; 1537.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India ...

  13. 424.pdf | 10feb2011 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; 10feb2011; 424.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Summer Research Fellowship Programme 2018 · Focus Area Science Technology Summer Fellowship ...

  14. 935.pdf | apr102008 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; apr102008; 935.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Ethical Guidelines and Procedures document. Posted on 17 January 2017. A revised version of the ...

  15. 602.pdf | sep102007 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; sep102007; 602.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India ...

  16. Ultradian rhythm unmasked in the Pdf clock mutant of Drosophila

    Indian Academy of Sciences (India)

    ... kept under constant dark conditions. In particular, the Pigment-dispersing factor mutant (Pdf01) demonstrated a precise and robust ultradian rhythmicity, which was not temperature compensated. Our results suggest that Drosophila has an endogenous ultradian oscillator that is masked by circadian rhythmic behaviours.

  17. 0521.pdf | dec2006 | jess | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jess; dec2006; 0521.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India on ...

  18. 1434.pdf | may252007 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; may252007; 1434.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of ...

  19. 1697.pdf | jun252007 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; jun252007; 1697.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Associates – 2017. Posted on 30 August 2017. Click here to see the list · 28th Mid Year Meeting.

  20. A Lagrangian mixing frequency model for transported PDF modeling

    Science.gov (United States)

    Turkeri, Hasret; Zhao, Xinyu

    2017-11-01

    In this study, a Lagrangian mixing frequency model is proposed for molecular mixing models within the framework of transported probability density function (PDF) methods. The model is based on the dissipations of mixture fraction and progress variables obtained from Lagrangian particles in PDF methods. The new model is proposed as a remedy to the difficulty in choosing the optimal model constant parameters when using conventional mixing frequency models. The model is implemented in combination with the Interaction by exchange with the mean (IEM) mixing model. The performance of the new model is examined by performing simulations of Sandia Flame D and the turbulent premixed flame from the Cambridge stratified flame series. The simulations are performed using the pdfFOAM solver which is a LES/PDF solver developed entirely in OpenFOAM. A 16-species reduced mechanism is used to represent methane/air combustion, and in situ adaptive tabulation is employed to accelerate the finite-rate chemistry calculations. The results are compared with experimental measurements as well as with the results obtained using conventional mixing frequency models. Dynamic mixing frequencies are predicted using the new model without solving additional transport equations, and good agreement with experimental data is observed.

  1. Shape reconstruction from gradient data.

    Science.gov (United States)

    Ettl, Svenja; Kaminski, Jürgen; Knauer, Markus C; Häusler, Gerd

    2008-04-20

    We present a generalized method for reconstructing the shape of an object from measured gradient data. A certain class of optical sensors does not measure the shape of an object but rather its local slope. These sensors display several advantages, including high information efficiency, sensitivity, and robustness. For many applications, however, it is necessary to acquire the shape, which must be calculated from the slopes by numerical integration. Existing integration techniques show drawbacks that render them unusable in many cases. Our method is based on an approximation employing radial basis functions. It can be applied to irregularly sampled, noisy, and incomplete data, and it reconstructs surfaces both locally and globally with high accuracy.

  2. The earth's shape and gravity

    CERN Document Server

    Garland, G D; Wilson, J T

    2013-01-01

    The Earth's Shape and Gravity focuses on the progress of the use of geophysical methods in investigating the interior of the earth and its shape. The publication first offers information on gravity, geophysics, geodesy, and geology and gravity measurements. Discussions focus on gravity measurements and reductions, potential and equipotential surfaces, absolute and relative measurements, and gravity networks. The text then elaborates on the shape of the sea-level surface and reduction of gravity observations. The text takes a look at gravity anomalies and structures in the earth's crust; interp

  3. Signaling of pigment-dispersing factor (PDF in the Madeira cockroach Rhyparobia maderae.

    Directory of Open Access Journals (Sweden)

    Hongying Wei

    Full Text Available The insect neuropeptide pigment-dispersing factor (PDF is a functional ortholog of vasoactive intestinal polypeptide, the coupling factor of the mammalian circadian pacemaker. Despite of PDF's importance for synchronized circadian locomotor activity rhythms its signaling is not well understood. We studied PDF signaling in primary cell cultures of the accessory medulla, the circadian pacemaker of the Madeira cockroach. In Ca²⁺ imaging studies four types of PDF-responses were distinguished. In regularly bursting type 1 pacemakers PDF application resulted in dose-dependent long-lasting increases in Ca²⁺ baseline concentration and frequency of oscillating Ca²⁺ transients. Adenylyl cyclase antagonists prevented PDF-responses in type 1 cells, indicating that PDF signaled via elevation of intracellular cAMP levels. In contrast, in type 2 pacemakers PDF transiently raised intracellular Ca²⁺ levels even after blocking adenylyl cyclase activity. In patch clamp experiments the previously characterized types 1-4 could not be identified. Instead, PDF-responses were categorized according to ion channels affected. Application of PDF inhibited outward potassium or inward sodium currents, sometimes in the same neuron. In a comparison of Ca²⁺ imaging and patch clamp experiments we hypothesized that in type 1 cells PDF-dependent rises in cAMP concentrations block primarily outward K⁺ currents. Possibly, this PDF-dependent depolarization underlies PDF-dependent phase advances of pacemakers. Finally, we propose that PDF-dependent concomitant modulation of K⁺ and Na⁺ channels in coupled pacemakers causes ultradian membrane potential oscillations as prerequisite to efficient synchronization via resonance.

  4. Genetic genealogy reveals true Y haplogroup of House of Bourbon contradicting recent identification of the presumed remains of two French Kings

    Science.gov (United States)

    Larmuseau, Maarten H D; Delorme, Philippe; Germain, Patrick; Vanderheyden, Nancy; Gilissen, Anja; Van Geystelen, Anneleen; Cassiman, Jean-Jacques; Decorte, Ronny

    2014-01-01

    Genetic analysis strongly increases the opportunity to identify skeletal remains or other biological samples from historical figures. However, validation of this identification is essential and should be done by DNA typing of living relatives. Based on the similarity of a limited set of Y-STRs, a blood sample and a head were recently identified as those belonging respectively to King Louis XVI and his paternal ancestor King Henry IV. Here, we collected DNA samples from three living males of the House of Bourbon to validate the since then controversial identification of these remains. The three living relatives revealed the Bourbon's Y-chromosomal variant on a high phylogenetic resolution for several members of the lineage between Henry IV and Louis XVI. This ‘true' Bourbon's variant is different from the published Y-STR profiles of the blood as well as of the head. The earlier identifications of these samples can therefore not be validated. Moreover, matrilineal genealogical data revealed that the published mtDNA sequence of the head was also different from the one of a series of relatives. This therefore leads to the conclusion that the analyzed samples were not from the French kings. Our study once again demonstrated that in order to realize an accurate genetic identification of historical remains DNA typing of living persons, who are paternally or maternally related with the presumed donor of the samples, is required. PMID:24105374

  5. Chemical induction of presumed dominant-lethal mutations in postcopulation germ cells of mice. I. Relative sensitivity between pre- and postcopulation germ cells to isopropyl methanesulfonate.

    Science.gov (United States)

    Suter, K E

    1975-12-01

    Females from (C3H X 101)F1 and a mixed stock were injected intraperitoneally with either 25 or 50 mg/kg isopropyl methanesulfonate (IMS) or Hanks' solution 4-5 h after the midpoint of the dark period during which mating occurred. It was determined that at the time of treatment the great majority of oocytes were undergoing second meiotic division. For comparison, the same doses of IMS were given to females treated within 3-5 days prior to mating (predominantly dictyate oocytes) or to males treated within 4-5 days prior to mating (sperm in vas and epididymis). The frequencies of presumed dominant lethals induced by 50 mg/kg IMS in sperm treated in vas and epididymis, dictyate oocytes, and germ cells in mated females are 22%, 19%, and 79%, respectively, for (C3H X 101)F1 and 26%, 30%, and 76% for the other stock. Clearly, in both stocks, effects in mated females, when both female and male germ cells were treated, are relatively much higher than the added effects on dyctyate oocytes and spermatozoa. This is also true for the 25 mg/kg dose.

  6. Chemical induction of presumed dominant-lethal mutations in postcopulation germ cells and zygotes of mice. II. Sensitivity of different postcopulation-precleavage stages to three alkylating chemicals.

    Science.gov (United States)

    Suter, K E; Generoso, W M

    1976-02-01

    The relative sensitivities of various postcopulation-precleabage and pronuclear stages to dominant-lethal effects of isopropyl methanesulfonate (IMS), ethyl methanesulfonate (EMS), and triethylenemelamine (TEM) were investigated. The pattern of sensitivity differed with the chemical. IMS was most effective when pronuclear formation was already completed and the majority of the zygotes were presumably undergoing DNA synthesis. EMS, on the other hand, induced its most pronounced effects when eggs in the course of second meiotic division and zygotes in early pronuclear stages were treated. The greatest effect of TEM was observed when zygotes were treated at the early pronuclear stage. EMS and TEM, in contrast to IMS, are similar to radiations in that zygotes undergoing DNA synthesis are more resistant to them than are the early pronuclear stages. In the case of IMS, effects induced in the most sensitive postcopulation-precleavage stage were 6 to 9 times greater than in the most sensitive precopulatory dictyate oocytes or male germ cells. On the other hand, in the case of EMS and TEM, the most sensitive precopulatory male germ cells, but not the dictyate oocytes, were more sensitive than the most sensitive postcopulation stages.

  7. A novel ABCD1 mutation detected by next generation sequencing in presumed hereditary spastic paraplegia: A 30-year diagnostic delay caused by misleading biochemical findings.

    Science.gov (United States)

    Koutsis, Georgios; Lynch, David S; Tucci, Arianna; Houlden, Henry; Karadima, Georgia; Panas, Marios

    2015-08-15

    To present a Greek family in which 5 male and 2 female members developed progressive spastic paraplegia. Plasma very long chain fatty acids (VLCFA) were reportedly normal at first testing in an affected male and for over 30 years the presumed diagnosis was hereditary spastic paraplegia (HSP). Targeted next generation sequencing (NGS) was used as a further diagnostic tool. Targeted exome sequencing in the proband, followed by Sanger sequencing confirmation; mutation segregation testing in multiple family members and plasma VLCFA measurement in the proband. NGS of the proband revealed a novel frameshift mutation in ABCD1 (c.1174_1178del, p.Leu392Serfs*7), bringing an end to diagnostic uncertainty by establishing the diagnosis of adrenomyeloneuropathy (AMN), the myelopathic phenotype of X-linked adrenoleukodystrophy (ALD). The mutation segregated in all family members and the diagnosis of AMN/ALD was confirmed by plasma VLCFA measurement. Confounding factors that delayed the diagnosis are presented. This report highlights the diagnostic utility of NGS in patients with undiagnosed spastic paraplegia, establishing a molecular diagnosis of AMN, allowing proper genetic counseling and management, and overcoming the diagnostic delay that can be rarely caused by false negative VLCFA analysis. Copyright © 2015 Elsevier B.V. All rights reserved.

  8. Genetic genealogy reveals true Y haplogroup of House of Bourbon contradicting recent identification of the presumed remains of two French Kings.

    Science.gov (United States)

    Larmuseau, Maarten H D; Delorme, Philippe; Germain, Patrick; Vanderheyden, Nancy; Gilissen, Anja; Van Geystelen, Anneleen; Cassiman, Jean-Jacques; Decorte, Ronny

    2014-05-01

    Genetic analysis strongly increases the opportunity to identify skeletal remains or other biological samples from historical figures. However, validation of this identification is essential and should be done by DNA typing of living relatives. Based on the similarity of a limited set of Y-STRs, a blood sample and a head were recently identified as those belonging respectively to King Louis XVI and his paternal ancestor King Henry IV. Here, we collected DNA samples from three living males of the House of Bourbon to validate the since then controversial identification of these remains. The three living relatives revealed the Bourbon's Y-chromosomal variant on a high phylogenetic resolution for several members of the lineage between Henry IV and Louis XVI. This 'true' Bourbon's variant is different from the published Y-STR profiles of the blood as well as of the head. The earlier identifications of these samples can therefore not be validated. Moreover, matrilineal genealogical data revealed that the published mtDNA sequence of the head was also different from the one of a series of relatives. This therefore leads to the conclusion that the analyzed samples were not from the French kings. Our study once again demonstrated that in order to realize an accurate genetic identification of historical remains DNA typing of living persons, who are paternally or maternally related with the presumed donor of the samples, is required.

  9. Acute cerebellar dysfunction with neuromuscular manifestations after scorpionism presumably caused by Tityus obscurus in Santarém, Pará / Brazil.

    Science.gov (United States)

    Torrez, Pasesa P Q; Quiroga, Mariana M M; Abati, Paulo A M; Mascheretti, Melissa; Costa, Walter Silva; Campos, Luciana P; França, Francisco O S

    2015-03-01

    Scorpionism is a public health problem in many tropical countries, especially in North Africa, South India, Latin America and the Middle East. In Brazil, patients with severe scorpion envenoming have mainly cardiovascular events, including acute heart failure, acute respiratory distress syndrome and shock, death is rare. We described 58 accidents presumably caused by Tityus obscurus in Brazilian Amazonia. Patients reported a sensation of "electric shocks" which could last hours. The vast majority of patients presented a clinical picture compatible with acute cerebellar dysfunction, beginning minutes and lasting up to 2 days after the accident. They presented cerebellar ataxia, dysdiadochokinesia, dysmetry, dysarthria, dyslalia, nausea and vomiting. Besides, some patients presented myoclonus and fasciculation which can also be attributed to cerebellar dysfunction or maybe the result of direct action on skeletal muscle. Two patients had evidence of intense rhabdomyolysis and acute kidney injury. The clinical picture in this scorpion envenoming is mainly characterized by an acute dysfunction of cerebellar activities and abnormal neuromuscular manifestations and in some cases muscle injury which are not described in any other region of the world. This work presents clinical, epidemiologic, laboratory and treatment aspects of this unmatched scorpion envenoming in the state of Pará, northern Brazil. Copyright © 2015 Elsevier Ltd. All rights reserved.

  10. Durability test of geomembrane liners presumed to avail near surface disposal facilities for low-level waste generated from research, industrial and medical facilities

    International Nuclear Information System (INIS)

    Nakata, Hisakazu; Amazawa, Hiroya; Sakai, Akihiro; Kurosawa, Ryohei; Sakamoto, Yoshiaki; Kanno, Naohiro; Kashima, Takahiro

    2014-02-01

    The Low-level Radioactive Waste Disposal Project Center will construct near surface disposal facilities for radioactive wastes from research, industrial and medical facilities. The disposal facilities consist of “concrete pit type” for low-level radioactive wastes and “trench type” for very low level radioactive wastes. As for the trench type disposal facility, two kinds of facility designs are on projects – one for a normal trench type disposal facility without any of engineered barriers and the other for a trench type disposal facility with geomembrane liners that could prevent from causing environmental effects of non radioactive toxic materials contained in the waste packages. The disposal facility should be designed taking basic properties of durability on geomembrane liners into account, for it is exposed to natural environment on a long-term basis. This study examined mechanical strength and permeability properties to assess the durability on the basis of an indoor accelerated exposure experiment targeting the liner materials presumed to avail the conceptual design so far. Its results will be used for the basic and detailed design henceforth by confirming the empirical degradation characteristic with the progress of the exposure time. (author)

  11. Aging changes in body shape

    Science.gov (United States)

    ... MedlinePlus Site Map FAQs Customer Support Health Topics Drugs & Supplements Videos & Tools Español You Are Here: Home → Medical Encyclopedia → Aging changes in body shape URL of this page: // ...

  12. Shape morphing Kirigami mechanical metamaterials.

    Science.gov (United States)

    Neville, Robin M; Scarpa, Fabrizio; Pirrera, Alberto

    2016-08-05

    Mechanical metamaterials exhibit unusual properties through the shape and movement of their engineered subunits. This work presents a new investigation of the Poisson's ratios of a family of cellular metamaterials based on Kirigami design principles. Kirigami is the art of cutting and folding paper to obtain 3D shapes. This technique allows us to create cellular structures with engineered cuts and folds that produce large shape and volume changes, and with extremely directional, tuneable mechanical properties. We demonstrate how to produce these structures from flat sheets of composite materials. By a combination of analytical models and numerical simulations we show how these Kirigami cellular metamaterials can change their deformation characteristics. We also demonstrate the potential of using these classes of mechanical metamaterials for shape change applications like morphing structures.

  13. Shape-morphing nanocomposite origami.

    Science.gov (United States)

    Andres, Christine M; Zhu, Jian; Shyu, Terry; Flynn, Connor; Kotov, Nicholas A

    2014-05-20

    Nature provides a vast array of solid materials that repeatedly and reversibly transform in shape in response to environmental variations. This property is essential, for example, for new energy-saving technologies, efficient collection of solar radiation, and thermal management. Here we report a similar shape-morphing mechanism using differential swelling of hydrophilic polyelectrolyte multilayer inkjets deposited on an LBL carbon nanotube (CNT) composite. The out-of-plane deflection can be precisely controlled, as predicted by theoretical analysis. We also demonstrate a controlled and stimuli-responsive twisting motion on a spiral-shaped LBL nanocomposite. By mimicking the motions achieved in nature, this method offers new opportunities for the design and fabrication of functional stimuli-responsive shape-morphing nanoscale and microscale structures for a variety of applications.

  14. Shape Deformations in Atomic Nuclei

    OpenAIRE

    Hamamoto, Ikuko; Mottelson, Ben R.

    2011-01-01

    The ground states of some nuclei are described by densities and mean fields that are spherical, while others are deformed. The existence of non-spherical shape in nuclei represents a spontaneous symmetry breaking.

  15. Electrochromic fiber-shaped supercapacitors.

    Science.gov (United States)

    Chen, Xuli; Lin, Huijuan; Deng, Jue; Zhang, Ye; Sun, Xuemei; Chen, Peining; Fang, Xin; Zhang, Zhitao; Guan, Guozhen; Peng, Huisheng

    2014-12-23

    An electrochromic fiber-shaped super-capacitor is developed by winding aligned carbon nanotube/polyaniline composite sheets on an elastic fiber. The fiber-shaped supercapacitors demonstrate rapid and reversible chromatic transitions under different working states, which can be directly observed by the naked eye. They are also stretchable and flexible, and are woven into textiles to display designed signals in addition to storing energy. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  16. ESR powder line shape calculations

    Energy Technology Data Exchange (ETDEWEB)

    Vitko, J. Jr.; Huddleston, R.E.

    1976-05-01

    A program has been developed for computing the ESR spectrum of a collection of randomly oriented spins subject only to an electronic Zeeman interaction and having a Lorentzian single crystal line shape. Other single crystal line shapes, including numerical solutions of the Bloch equations, can be accommodated with minor modifications. The program differs in several features from those existing elsewhere, thus enabling one to study saturation effects, over-modulation effects, both absorptive and dispersive signals, and second and higher order derivative signals.

  17. Shape changes in 101Pd

    International Nuclear Information System (INIS)

    Dinesh, S.; Carmel Vigila Bai, G.M.; Santhosh Kumar, S.; Anusha, B.

    2001-01-01

    In heavy ion collision compound nuclei can be formed with high excitation energies and with very high angular momenta. Most of these emphasize and discuss the structure effects, yrast traps etc. The spin degree of freedom inherently involves deformation and structural or shape changes. The shape of a nucleus should be very sensitive to the increase of its temperature. The increasing temperature affects the occupations of the single particle levels near the Fermi energy are investigated

  18. Deformation Based Curved Shape Representation.

    Science.gov (United States)

    Demisse, Girum G; Aouada, Djamila; Ottersten, Bjorn

    2017-06-02

    In this paper, we introduce a deformation based representation space for curved shapes in Rn. Given an ordered set of points sampled from a curved shape, the proposed method represents the set as an element of a finite dimensional matrix Lie group. Variation due to scale and location are filtered in a preprocessing stage, while shapes that vary only in rotation are identified by an equivalence relationship. The use of a finite dimensional matrix Lie group leads to a similarity metric with an explicit geodesic solution. Subsequently, we discuss some of the properties of the metric and its relationship with a deformation by least action. Furthermore, invariance to reparametrization or estimation of point correspondence between shapes is formulated as an estimation of sampling function. Thereafter, two possible approaches are presented to solve the point correspondence estimation problem. Finally, we propose an adaptation of k-means clustering for shape analysis in the proposed representation space. Experimental results show that the proposed representation is robust to uninformative cues, e.g. local shape perturbation and displacement. In comparison to state of the art methods, it achieves a high precision on the Swedish and the Flavia leaf datasets and a comparable result on MPEG-7, Kimia99 and Kimia216 datasets.

  19. Shape analysis in medical image analysis

    CERN Document Server

    Tavares, João

    2014-01-01

    This book contains thirteen contributions from invited experts of international recognition addressing important issues in shape analysis in medical image analysis, including techniques for image segmentation, registration, modelling and classification, and applications in biology, as well as in cardiac, brain, spine, chest, lung and clinical practice. This volume treats topics such as, anatomic and functional shape representation and matching; shape-based medical image segmentation; shape registration; statistical shape analysis; shape deformation; shape-based abnormity detection; shape tracking and longitudinal shape analysis; machine learning for shape modeling and analysis; shape-based computer-aided-diagnosis; shape-based medical navigation; benchmark and validation of shape representation, analysis and modeling algorithms. This work will be of interest to researchers, students, and manufacturers in the fields of artificial intelligence, bioengineering, biomechanics, computational mechanics, computationa...

  20. Thermoviscoelastic shape memory behavior for epoxy-shape memory polymer

    International Nuclear Information System (INIS)

    Chen, Jianguo; Liu, Liwu; Liu, Yanju; Leng, Jinsong

    2014-01-01

    There are various applications for shape memory polymer (SMP) in the smart materials and structures field due to its large recoverable strain and controllable driving method. The mechanical shape memory deformation mechanism is so obscure that many samples and test schemes have to be tried in order to verify a final design proposal for a smart structure system. This paper proposes a simple and very useful method to unambiguously analyze the thermoviscoelastic shape memory behavior of SMP smart structures. First, experiments under different temperature and loading conditions are performed to characterize the large deformation and thermoviscoelastic behavior of epoxy-SMP. Then, a rheological constitutive model, which is composed of a revised standard linear solid (SLS) element and a thermal expansion element, is proposed for epoxy-SMP. The thermomechanical coupling effect and nonlinear viscous flowing rules are considered in the model. Then, the model is used to predict the measured rubbery and time-dependent response of the material, and different thermomechanical loading histories are adopted to verify the shape memory behavior of the model. The results of the calculation agree with experiments satisfactorily. The proposed shape memory model is practical for the design of SMP smart structures. (paper)

  1. Triple shape memory effect of star-shaped polyurethane.

    Science.gov (United States)

    Yang, Xifeng; Wang, Lin; Wang, Wenxi; Chen, Hongmei; Yang, Guang; Zhou, Shaobing

    2014-05-14

    In this study, we synthesized one type of star-shaped polyurethane (SPU) with star-shaped poly(ε-caprolactone) (SPCL) containing different arm numbers as soft segment and 4,4'-diphenyl methane diisocyanate (MDI) as well as chain extender 1,4-butylene glycol (BDO) as hard segment. Proton nuclear magnetic resonance (1H-NMR) confirmed the chemical structure of the material. Differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) results indicated that both the melting temperature (Tm) and transition temperature (Ttrans) of SPU decreased with the hard segment composition increase. X-ray diffraction (XRD) results demonstrated that the increase of the crystallinity of SPU following the raised arm numbers endowed a high shape fixity of six-arm star-shaped polyurethane (6S-PU) and a wide melting temperature range, which resulted in an excellent triple-shape memory effect of 6S-PU. The in vitro cytotoxicity assay evaluated with osteoblasts through Alamar blue assay demonstrates that this copolymer possessed good cytocompatibility. This material can be potentially used as a new smart material in the field of biomaterials.

  2. Shape memory polymer foams for endovascular therapies

    Science.gov (United States)

    Wilson, Thomas S [Castro Valley, CA; Maitland, Duncan J [Pleasant Hill, CA

    2012-03-13

    A system for occluding a physical anomaly. One embodiment comprises a shape memory material body wherein the shape memory material body fits within the physical anomaly occluding the physical anomaly. The shape memory material body has a primary shape for occluding the physical anomaly and a secondary shape for being positioned in the physical anomaly.

  3. Shape memory polymer foams for endovascular therapies

    Science.gov (United States)

    Wilson, Thomas S.; Maitland, Duncan J.

    2015-05-26

    A system for occluding a physical anomaly. One embodiment comprises a shape memory material body wherein the shape memory material body fits within the physical anomaly occluding the physical anomaly. The shape memory material body has a primary shape for occluding the physical anomaly and a secondary shape for being positioned in the physical anomaly.

  4. Emotional collectives: How groups shape emotions and emotions shape groups.

    Science.gov (United States)

    van Kleef, Gerben A; Fischer, Agneta H

    2016-01-01

    Group settings are epicentres of emotional activity. Yet, the role of emotions in groups is poorly understood. How do group-level phenomena shape group members' emotional experience and expression? How are emotional expressions recognised, interpreted and shared in group settings? And how do such expressions influence the emotions, cognitions and behaviours of fellow group members and outside observers? To answer these and other questions, we draw on relevant theoretical perspectives (e.g., intergroup emotions theory, social appraisal theory and emotions as social information theory) and recent empirical findings regarding the role of emotions in groups. We organise our review according to two overarching themes: how groups shape emotions and how emotions shape groups. We show how novel empirical approaches break important new ground in uncovering the role of emotions in groups. Research on emotional collectives is thriving and constitutes a key to understanding the social nature of emotions.

  5. False-positive rate of positron emission tomography/computed tomography for presumed solitary metastatic adrenal disease in patients with known malignancy.

    Science.gov (United States)

    Kuritzkes, Benjamin; Parikh, Manish; Melamed, Jonathan; Hindman, Nicole; Pachter, H L

    2015-02-01

    The aim of this study was to determine the diagnostic accuracy of positron emission tomography (PET) in cancer patients undergoing adrenalectomy for presumed metastatic disease, utilizing the gold standard of histopathology. We retrospectively reviewed all adrenalectomies for metastatic disease performed at our institution over the last 12 years. Preoperative PET scans were compared with final pathology reports. Statistical analyses were performed with Fisher's exact test for categorical variables and Student's t test for continuous variables. Forty-nine adrenalectomies were performed for metastatic disease. Thirty had preoperative PET imaging and were included in this analysis. Mean age was 65.5 ± 13.6 years (29-91) and 54 % were male. Mean size was 3.8 cm (0.4-7.1). Primary tumor distribution was 61 % (n = 17) pulmonary; 11 % (n = 3) breast; 7 % (n = 2) gastric; 7 % (n = 2) renal; and 4 % (n = 1) each of brain, lymphoma, melanoma, and uterine. Mean standardized uptake value (SUV) was 11 ± 7.3 (3.2-30.0). Final pathology revealed that 80 % (25/30) were positive for metastatic disease and 20 % (5/30) were negative. The positive predictive value of PET in correctly identifying adrenal metastatic disease was 83 % (24 true-positive cases and 5 false-positive cases); there was one false-negative PET. False-positive PET results were not correlated with sex (p = 0.35), age (p = 0.24), or maximum SUV units (p = 0.26). The 20 % false-positive rate for PET-positive adrenalectomies performed for metastatic disease should warrant its inclusion in preoperative counseling to the patient and interaction with the treating oncologist.

  6. Very high-density lipoprotein and vitellin as carriers of novel biliverdins IXα with a farnesyl side-chain presumably derived from heme A in Spodoptera littoralis.

    Science.gov (United States)

    Kayser, Hartmut; Nimtz, Manfred; Ringler, Philippe; Müller, Shirley A

    2016-01-01

    Bilins in complex with specific proteins play key roles in many forms of life. Biliproteins have also been isolated from insects; however, structural details are rare and possible functions largely unknown. Recently, we identified a high-molecular weight biliprotein from a moth, Cerura vinula, as an arylphorin-type hexameric storage protein linked to a novel farnesyl biliverdin IXα; its unusual structure suggests formation by cleavage of mitochondrial heme A. In the present study of another moth, Spodoptera littoralis, we isolated two different biliproteins. These proteins were identified as a very high-density lipoprotein (VHDL) and as vitellin, respectively, by mass spectrometric sequencing. Both proteins are associated with three different farnesyl biliverdins IXα: the one bilin isolated from C. vinula and two new structurally closely related bilins, supposed to be intermediates of heme A degradation. The different bilin composition of the two biliproteins suggests that the presumed oxidations at the farnesyl side-chain take place mainly during egg development. The egg bilins are supposedly transferred from hemolymph VHDL to vitellin in the female. Both biliproteins show strong induced circular dichroism activity compatible with a predominance of the M-conformation of the bilins. This conformation is opposite to that of the arylphorin-type biliprotein from C. vinula. Electron microscopy of the VHDL-type biliprotein from S. littoralis provided a preliminary view of its structure as a homodimer and confirmed the biochemically determined molecular mass of ∼350 kDa. Further, images of S. littoralis hexamerins revealed a 2 × 3 construction identical to that known from the hexamerin from C. vinula. Copyright © 2015 Elsevier Ltd. All rights reserved.

  7. In vitro and in vivo gene therapy with CMV vector-mediated presumed dog beta-nerve growth factor in pyridoxine-induced neuropathy dogs.

    Science.gov (United States)

    Chung, Jin Young; Choi, Jung Hoon; Shin, Il Seob; Choi, Eun Wha; Hwang, Cheol Yong; Lee, Sang Koo; Youn, Hwa Young

    2008-12-01

    Due to the therapeutic potential of gene therapy for neuronal injury, many studies of neurotrophic factors, vectors, and animal models have been performed. The presumed dog beta-nerve growth factor (pdbeta-NGF) was generated and cloned and its expression was confirmed in CHO cells. The recombinant pdbeta-NGF protein reacted with a human beta-NGF antibody and showed bioactivity in PC12 cells. The pdbeta-NGF was shown to have similar bioactivity to the dog beta-NGF. The recombinant pdbeta-NGF plasmid was administrated into the intrathecal space in the gene therapy group. Twenty-four hours after the vector inoculation, the gene therapy group and the positive control group were intoxicated with excess pyridoxine for seven days. Each morning throughout the test period, the dogs' body weight was taken and postural reaction assessments were made. Electrophysiological recordings were performed twice, once before the experiment and once after the test period. After the experimental period, histological analysis was performed. Dogs in the gene therapy group had no weight change and were normal in postural reaction assessments. Electrophysiological recordings were also normal for the gene therapy group. Histological analysis showed that neither the axons nor the myelin of the dorsal funiculus of L4 were severely damaged in the gene therapy group. In addition, the dorsal root ganglia of L4 and the peripheral nerves (sciatic nerve) did not experience severe degenerative changes in the gene therapy group. This study is the first to show the protective effect of NGF gene therapy in a dog model.

  8. New or presumably new left bundle branch block in patients with suspected acute coronary syndrome: Clinical, echocardiographic, and electrocardiographic features from a single-center registry.

    Science.gov (United States)

    Hanna, Elias B; Lathia, Viral N; Ali, Murtuza; Deschamps, Eliana Hanna

    2015-01-01

    In patients with suspected acute coronary syndrome, a new or presumably new left bundle branch block (LBBB) does not always imply ST-segment elevation myocardial infarction (STEMI). We aimed to show the low frequency of STEMI-equivalent in this population and determine the diagnostic value of electrocardiographic and echocardiographic features. From the 387 patients captured by the Louisiana State University code STEMI registry between 2009 and 2012, we examined data on 26 patients with LBBB. These patients were divided into 3 groups according to the final diagnosis: (1) STEMI-equivalent, defined as an acute coronary occlusion on angiography (2 patients), (2) non-ST-segment elevation myocardial infarction (4 patients), and (3) diagnoses other than myocardial infarction (non-MI) (20 patients). Troponin elevation and left ventricular systolic dysfunction were common in all 3 groups (non-significant p-values). Compared with non-MI patients, patients with STEMI-equivalent had a larger degree of ST-segment discordance and T-wave discordance, as assessed by ST/QRS and T/QRS ratios (pdiagnosis of STEMI-equivalent in the setting of LBBB. Conversely, absolute values of ST-segment and T-wave discordance were not significantly different between groups. ST-segment concordance was highly specific for the diagnosis of STEMI-equivalent, but had a limited sensitivity. Only a minority of patients with suspected acute coronary syndrome and LBBB have a STEMI-equivalent. Excessive relative discordance of the ST segment or the T wave appears predictive of STEMI-equivalent, but this is only hypothesis-generating considering the small population size. Copyright © 2015 Elsevier Inc. All rights reserved.

  9. Statistical models of shape optimisation and evaluation

    CERN Document Server

    Davies, Rhodri; Taylor, Chris

    2014-01-01

    Deformable shape models have wide application in computer vision and biomedical image analysis. This book addresses a key issue in shape modelling: establishment of a meaningful correspondence between a set of shapes. Full implementation details are provided.

  10. Shapes formed by interacting cracks

    Science.gov (United States)

    Daniels, Karen

    2012-02-01

    Brittle failure through multiple cracks occurs in a wide variety of contexts, from microscopic failures in dental enamel and cleaved silicon to geological faults and planetary ice crusts. In each of these situations, with complicated stress geometries and different microscopic mechanisms, pairwise interactions between approaching cracks nonetheless produce characteristically curved fracture paths. We investigate the origins of this widely observed ``en passant'' crack pattern by fracturing a rectangular slab which is notched on each long side and subjected to quasi-static uniaxial strain from the short side. The two cracks propagate along approximately straight paths until they pass each other, after which they curve and release a lens-shaped fragment. We find that, for materials with diverse mechanical properties, each curve has an approximately square-root shape, and that the length of each fragment is twice its width. We are able to explain the origins of this universal shape with a simple geometrical model.

  11. Shape Synthesis in Mechanical Design

    Directory of Open Access Journals (Sweden)

    C. P. Teng

    2007-01-01

    Full Text Available The shaping of structural elements in the area of mechanical design is a recurrent problem. The mechanical designer, as a rule, chooses what is believed to be the “simplest” shapes, such as the geometric primitives: lines, circles and, occasionally, conics. The use of higher-order curves is usually not even considered, not to speak of other curves than polynomials. However, the simplest geometric shapes are not necessarily the most suitable when the designed element must withstand loads that can lead to failure-prone stress concentrations. Indeed, as mechanical designers have known for a while, stress concentrations occur, first and foremost, by virtue of either dramatic changes in curvature or extremely high values thereof. As an alternative, we propose here the use of smooth curves that can be simply generated using standard concepts such as non-parametric cubic splines. These curves can be readily used to produce either extruded surfaces or surfaces of revolution. 

  12. Shape morphing hinged truss structures

    International Nuclear Information System (INIS)

    Sofla, A Y N; Elzey, D M; Wadley, H N G

    2009-01-01

    Truss structures are widely used for the support of structural loads in applications where minimum mass solutions are required. Their nodes are normally constructed to resist rotation to maximize their stiffness under load. A multi-link node concept has recently been proposed that permits independent rotation of tetrahedral trusses linked by such a joint. High authority shape morphing truss structures can therefore be designed by the installation of linear displacement actuators within the truss mechanisms. Examples of actuated structures with either linear or planar shapes are presented and their ability to bend, twist and undulate is demonstrated. An experimental device has been constructed using one-way shape memory wire actuators in antagonistic configurations that permit reversible actuated structures. It is shown that the actuated structure displacement response is significantly amplified by use of a mechanically magnified design

  13. Event shape engineering with ALICE

    CERN Document Server

    Dobrin, A

    2013-01-01

    The strong fluctuations in the initial energy density of heavy-ion collisions allow an efficient selection of events corresponding to a specific initial geometry. For such "shape engineered events", the elliptic flow coefficient, $v_2$, of unidentified charged particles, pions and (anti-)protons in Pb-Pb collisions at $\\snn = 2.76$ TeV is measured by the ALICE collaboration. $v_2$ obtained with the event plane method at mid-rapidity, $|\\eta|<0.8$, is reported for different collision centralities as a function of transverse momentum, $\\pt$, out to $\\pt=20$ GeV/$c$. The measured $v_2$ for the shape engineered events is significantly larger or smaller than the average which demonstrates the ability to experimentally select events with the desired shape of the initial spatial asymmetry.

  14. Lunar Regolith Particle Shape Analysis

    Science.gov (United States)

    Kiekhaefer, Rebecca; Hardy, Sandra; Rickman, Douglas; Edmunson, Jennifer

    2013-01-01

    Future engineering of structures and equipment on the lunar surface requires significant understanding of particle characteristics of the lunar regolith. Nearly all sediment characteristics are influenced by particle shape; therefore a method of quantifying particle shape is useful both in lunar and terrestrial applications. We have created a method to quantify particle shape, specifically for lunar regolith, using image processing. Photomicrographs of thin sections of lunar core material were obtained under reflected light. Three photomicrographs were analyzed using ImageJ and MATLAB. From the image analysis measurements for area, perimeter, Feret diameter, orthogonal Feret diameter, Heywood factor, aspect ratio, sieve diameter, and sieve number were recorded. Probability distribution functions were created from the measurements of Heywood factor and aspect ratio.

  15. A Survey of Algorithmic Shapes

    Directory of Open Access Journals (Sweden)

    Ulrich Krispel

    2015-09-01

    Full Text Available In the context of computer-aided design, computer graphics and geometry processing, the idea of generative modeling is to allow the generation of highly complex objects based on a set of formal construction rules. Using these construction rules, a shape is described by a sequence of processing steps, rather than just by the result of all applied operations: shape design becomes rule design. Due to its very general nature, this approach can be applied to any domain and to any shape representation that provides a set of generating functions. The aim of this survey is to give an overview of the concepts and techniques of procedural and generative modeling, as well as their applications with a special focus on archeology and architecture.

  16. Quantifying the shape of aging

    DEFF Research Database (Denmark)

    Wrycza, Tomasz F; Missov, Trifon I; Baudisch, Annette

    2015-01-01

    In Biodemography, aging is typically measured and compared based on aging rates. We argue that this approach may be misleading, because it confounds the time aspect with the mere change aspect of aging. To disentangle these aspects, here we utilize a time-standardized framework and, instead...... of aging rates, suggest the shape of aging as a novel and valuable alternative concept for comparative aging research. The concept of shape captures the direction and degree of change in the force of mortality over age, which—on a demographic level—reflects aging. We 1) provide a list of shape properties...... suggested here aim to provide a general means to classify aging patterns independent of any particular mortality model and independent of any species-specific time-scale. Thereby they support systematic comparative aging research across different species or between populations of the same species under...

  17. Reflowing-driven paragraph recognition for electronic books in PDF

    Science.gov (United States)

    Fang, Jing; Tang, Zhi; Gao, Liangcai

    2011-01-01

    When reading electronic books on handheld devices, content sometimes should be reflowed and recomposed to adapt for small-screen mobile devices. According to people's reading practice, it is reasonable to reflow the text content based on paragraphs. Hence, this paper addresses the requirement and proposes a set of novel methods on paragraph recognition for electronic books in PDF. The proposed methods consist of three steps, namely, physical structure analysis, paragraph segmentation, and reading order detection. We make use of locally ordered property of PDF documents and layout style of books to improve traditional page recognition results. In addition, we employ the optimal matching of Bipartite Graph technology to detect paragraphs' reading order. Experiments show that our methods achieve high accuracy. It is noteworthy that, the research has been applied in a commercial software package for Chinese E-book production.

  18. Nuclear shapes: from earliest ideas to multiple shape coexisting structures

    International Nuclear Information System (INIS)

    Heyde, K; Wood, J L

    2016-01-01

    The concept of the atomic nucleus being characterized by an intrinsic property such as shape came as a result of high precision hyperfine studies in the field of atomic physics, which indicated a non-spherical nuclear charge distribution. Herein, we describe the various steps taken through ingenious experimentation and bold theoretical suggestions that mapped the way for later work in the early 50s by Aage Bohr, Ben Mottelson and James Rainwater. We lay out a long and winding road that marked, in the period of 50s to 70s, the way shell-model and collective-model concepts were reconciled. A rapid increase in both accelerator and detection methods (70s towards the early 2000s) opened new vistas into nuclear shapes, and their coexistence, in various regions of the nuclear mass table. Next, we outline a possible unified view of nuclear shapes: emphasizing decisive steps taken as well as questions remaining, next to the theoretical efforts that could result in an emerging understanding of nuclear shapes, building on the nucleus considered as a strongly interacting system of nucleons as the microscopic starting point. (invited comment)

  19. Emotional collectives : How groups shape emotions and emotions shape groups

    NARCIS (Netherlands)

    van Kleef, G.A.; Fischer, A.H.

    2016-01-01

    Group settings are epicentres of emotional activity. Yet, the role of emotions in groups is poorly understood. How do group-level phenomena shape group members’ emotional experience and expression? How are emotional expressions recognised, interpreted and shared in group settings? And how do such

  20. MEETING REPORTS.pdf | jul252000 | currsci | Indian Academy of ...

    Indian Academy of Sciences (India)

    Home; currsci; jul252000; MEETING REPORTS.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Associates – 2017. Posted on 30 August 2017. Click here to see the list · 28th Mid Year ...

  1. CHAKRA.pdf | jun2005 | jess | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jess; jun2005; CHAKRA.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held ...

  2. 49.pdf | jan102003 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; jan102003; 49.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held ...

  3. 990.pdf | apr252001 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; apr252001; 990.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held ...

  4. 37.pdf | jan102006 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; jan102006; 37.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held ...

  5. 1417.pdf | nov252004 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; nov252004; 1417.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be ...

  6. 1089.pdf | jul2014 | jess | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jess; jul2014; 1089.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held from ...

  7. jess44.pdf | jun2010 | jess | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jess; jun2010; jess44.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held ...

  8. 1328.pdf | dec102002 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; dec102002; 1328.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be ...

  9. 783.pdf | dec2010 | jess | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jess; dec2010; 783.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held from ...

  10. 577.pdf | 10sep2010 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; 10sep2010; 577.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held ...

  11. 867.pdf | aug2012 | jess | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; jess; aug2012; 867.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held from ...

  12. PDF modeling of turbulent flows on unstructured grids

    Science.gov (United States)

    Bakosi, J.

    2010-06-01

    In probability density function (PDF) methods of turbulent flows, the joint PDF of several flow variables is computed by numerically integrating a system of stochastic differential equations for Lagrangian particles. A mathematically exact treatment of advection, viscous effects and arbitrarily complex chemical reactions is possible; these processes are treated without closure assumptions. A set of algorithms is proposed to provide an efficient solution of the PDF transport equation modeling the joint PDF of turbulent velocity, frequency and concentration of a passive scalar in geometrically complex configurations. An unstructured Eulerian grid is employed to extract Eulerian statistics, to solve for quantities represented at fixed locations of the domain and to track particles. All three aspects regarding the grid make use of the finite element method. Compared to hybrid methods, the current methodology is stand-alone, therefore it is consistent both numerically and at the level of turbulence closure without the use of consistency conditions. Several newly developed algorithms are described that facilitate the numerical solution in complex flow geometries, including a stabilized mean-pressure projection scheme, the estimation of conditional and unconditional Eulerian statistics and their derivatives from stochastic particle fields, particle tracking through unstructured grids, an efficient particle redistribution procedure and techniques related to efficient random number generation. The solver has been parallelized and optimized for shared memory and multi-core architectures using the OpenMP standard. Relevant aspects of performance and parallelism on cache-based shared memory machines are discussed and presented in detail. The methodology shows great promise in the simulation of high-Reynolds-number incompressible inert or reactive turbulent flows in realistic configurations.

  13. 1610.pdf | 10jun2011 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; 10jun2011; 1610.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be ...

  14. PDF Lecture Materials for Online and ``Flipped'' Format Astronomy Courses

    Science.gov (United States)

    Kary, D. M.; Eisberg, J.

    2013-04-01

    Online astronomy courses typically rely on students reading the textbook and/or a set of text-based lecture notes to replace the “lecture” material. However, many of our students report that this is much less engaging than in-person lectures, especially given the amount of interactive work such as “think-pair-share” problems done in many astronomy classes. Students have similarly criticized direct lecture-capture. To address this, we have developed a set of PowerPoint-style presentations with embedded lecture audio combined with prompts for student interaction including think-pair-share questions. These are formatted PDF packages that can be used on a range of different computers using free software. The presentations are first developed using Microsoft PowerPoint software. Audio recordings of scripted lectures are then synchronized with the presentations and the entire package is converted to PDF using Adobe Presenter. This approach combines the ease of editing that PowerPoint provides along with the platform-independence of PDF. It's easy to add, remove, or edit individual slides as needed, and PowerPoint supports internal links so that think-pair-share questions can be inserted with links to feedback based on the answers selected. Modern PDF files support animated visuals with synchronized audio and they can be read using widely available free software. Using these files students in an online course can get many of the benefits of seeing and hearing the course material presented in an in-person lecture format. Students needing extra help in traditional lecture classes can use these presentations to help review the materials covered in lecture. Finally, the presentations can be used in a “flipped” format in which students work through the presentations outside of class time while spending the “lecture” time on in-class interaction.

  15. 897.pdf | apr102004 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; apr102004; 897.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held ...

  16. 346.pdf | feb102006 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; feb102006; 346.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube · Twitter · Facebook · Blog. Academy News. IAS Logo. Associates – 2017. Posted on 30 August 2017. Click here to see the list · 28th Mid Year Meeting. Posted on ...

  17. 1383.pdf | may252007 | currsci | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; currsci; may252007; 1383.pdf. 404! error. The page your are looking for can not be found! Please check the link or use the navigation bar at the top. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be ...

  18. APFEL: A PDF Evolution Library with QED corrections

    CERN Document Server

    Bertone, Valerio; Rojo, Juan

    2014-01-01

    Quantum electrodynamics and electroweak corrections are important ingredients for many theoretical predictions at the LHC. This paper documents APFEL, a new PDF evolution package that allows for the first time to perform DGLAP evolution up to NNLO in QCD and to LO in QED, in the variable-flavor-number scheme and with either pole or MSbar heavy quark masses. APFEL consistently accounts for the QED corrections to the evolution of quark and gluon PDFs and for the contribution from the photon PDF in the proton. The coupled QCD+QED equations are solved in x-space by means of higher order interpolation, followed by Runge-Kutta solution of the resulting discretized evolution equations. APFEL is based on an innovative and flexible methodology for the sequential solution of the QCD and QED evolution equations and their combination. In addition to PDF evolution, APFEL provides a module that computes Deep-Inelastic Scattering structure functions in the FONLL general-mass variable-flavor-number scheme up to O($\\alpha_s^2...

  19. Extra dimensions: 3d and time in pdf documentation

    International Nuclear Information System (INIS)

    Graf, N A

    2008-01-01

    High energy physics is replete with multi-dimensional information which is often poorly represented by the two dimensions of presentation slides and print media. Past efforts to disseminate such information to a wider audience have failed for a number of reasons, including a lack of standards which are easy to implement and have broad support. Adobe's Portable Document Format (PDF) has in recent years become the de facto standard for secure, dependable electronic information exchange. It has done so by creating an open format, providing support for multiple platforms and being reliable and extensible. By providing support for the ECMA standard Universal 3D (U3D) file format in its free Adobe Reader software, Adobe has made it easy to distribute and interact with 3D content. By providing support for scripting and animation, temporal data can also be easily distributed to a wide audience. In this talk, we present examples of HEP applications which take advantage of this functionality. We demonstrate how 3D detector elements can be documented, using either CAD drawings or other sources such as GEANT visualizations as input. Using this technique, higher dimensional data, such as LEGO plots or time-dependent information can be included in PDF files. In principle, a complete event display, with full interactivity, can be incorporated into a PDF file. This would allow the end user not only to customize the view and representation of the data, but to access the underlying data itself

  20. Extra Dimensions: 3D and Time in PDF Documentation

    Energy Technology Data Exchange (ETDEWEB)

    Graf, Norman A.; /SLAC

    2011-11-10

    High energy physics is replete with multi-dimensional information which is often poorly represented by the two dimensions of presentation slides and print media. Past efforts to disseminate such information to a wider audience have failed for a number of reasons, including a lack of standards which are easy to implement and have broad support. Adobe's Portable Document Format (PDF) has in recent years become the de facto standard for secure, dependable electronic information exchange. It has done so by creating an open format, providing support for multiple platforms and being reliable and extensible. By providing support for the ECMA standard Universal 3D (U3D) file format in its free Adobe Reader software, Adobe has made it easy to distribute and interact with 3D content. By providing support for scripting and animation, temporal data can also be easily distributed to a wide audience. In this talk, we present examples of HEP applications which take advantage of this functionality. We demonstrate how 3D detector elements can be documented, using either CAD drawings or other sources such as GEANT visualizations as input. Using this technique, higher dimensional data, such as LEGO plots or time-dependent information can be included in PDF files. In principle, a complete event display, with full interactivity, can be incorporated into a PDF file. This would allow the end user not only to customize the view and representation of the data, but to access the underlying data itself.

  1. Sparse PDF Volumes for Consistent Multi-Resolution Volume Rendering

    KAUST Repository

    Sicat, Ronell Barrera

    2014-12-31

    This paper presents a new multi-resolution volume representation called sparse pdf volumes, which enables consistent multi-resolution volume rendering based on probability density functions (pdfs) of voxel neighborhoods. These pdfs are defined in the 4D domain jointly comprising the 3D volume and its 1D intensity range. Crucially, the computation of sparse pdf volumes exploits data coherence in 4D, resulting in a sparse representation with surprisingly low storage requirements. At run time, we dynamically apply transfer functions to the pdfs using simple and fast convolutions. Whereas standard low-pass filtering and down-sampling incur visible differences between resolution levels, the use of pdfs facilitates consistent results independent of the resolution level used. We describe the efficient out-of-core computation of large-scale sparse pdf volumes, using a novel iterative simplification procedure of a mixture of 4D Gaussians. Finally, our data structure is optimized to facilitate interactive multi-resolution volume rendering on GPUs.

  2. Presumed consent for organ preservation in uncontrolled donation after cardiac death in the United States: a public policy with serious consequences.

    Science.gov (United States)

    Verheijde, Joseph L; Rady, Mohamed Y; McGregor, Joan

    2009-09-22

    Organ donation after cessation of circulation and respiration, both controlled and uncontrolled, has been proposed by the Institute of Medicine as a way to increase opportunities for organ procurement. Despite claims to the contrary, both forms of controlled and uncontrolled donation after cardiac death raise significant ethical and legal issues. Identified causes for concern include absence of agreement on criteria for the declaration of death, nonexistence of universal guidelines for duration before stopping resuscitation efforts and techniques, and assumption of presumed intent to donate for the purpose of initiating temporary organ-preservation interventions when no expressed consent to donate is present. From a legal point of view, not having scientifically valid criteria of cessation of circulation and respiration for declaring death could lead to a conclusion that organ procurement itself is the proximate cause of death. Although the revised Uniform Anatomical Gift Act of 2006 provides broad immunity to those involved in organ-procurement activities, courts have yet to provide an opinion on whether persons can be held liable for injuries arising from the determination of death itself. Preserving organs in uncontrolled donation after cardiac death requires the administration of life-support systems such as extracorporeal membrane oxygenation. These life-support systems can lead to return of signs of life that, in turn, have to be deliberately suppressed by the administration of pharmacological agents. Finally, allowing temporary organ-preservation interventions without expressed consent is inherently a violation of the principle of respect for a person's autonomy. Proponents of organ donation from uncontrolled donation after cardiac death, on the other hand, claim that these nonconsensual interventions enhance respect for autonomy by allowing people, through surrogate decision making, to execute their right to donate organs. However, the lack of transparency

  3. Presumed consent for organ preservation in uncontrolled donation after cardiac death in the United States: a public policy with serious consequences

    Directory of Open Access Journals (Sweden)

    Rady Mohamed Y

    2009-09-01

    Full Text Available Abstract Organ donation after cessation of circulation and respiration, both controlled and uncontrolled, has been proposed by the Institute of Medicine as a way to increase opportunities for organ procurement. Despite claims to the contrary, both forms of controlled and uncontrolled donation after cardiac death raise significant ethical and legal issues. Identified causes for concern include absence of agreement on criteria for the declaration of death, nonexistence of universal guidelines for duration before stopping resuscitation efforts and techniques, and assumption of presumed intent to donate for the purpose of initiating temporary organ-preservation interventions when no expressed consent to donate is present. From a legal point of view, not having scientifically valid criteria of cessation of circulation and respiration for declaring death could lead to a conclusion that organ procurement itself is the proximate cause of death. Although the revised Uniform Anatomical Gift Act of 2006 provides broad immunity to those involved in organ-procurement activities, courts have yet to provide an opinion on whether persons can be held liable for injuries arising from the determination of death itself. Preserving organs in uncontrolled donation after cardiac death requires the administration of life-support systems such as extracorporeal membrane oxygenation. These life-support systems can lead to return of signs of life that, in turn, have to be deliberately suppressed by the administration of pharmacological agents. Finally, allowing temporary organ-preservation interventions without expressed consent is inherently a violation of the principle of respect for a person's autonomy. Proponents of organ donation from uncontrolled donation after cardiac death, on the other hand, claim that these nonconsensual interventions enhance respect for autonomy by allowing people, through surrogate decision making, to execute their right to donate organs

  4. Shaping Discourse and Setting Examples

    DEFF Research Database (Denmark)

    Persson, Anders

    2017-01-01

    around an issue. By using Tuomas Forsberg's framework of four different mechanisms of normative power: persuasion, invoking norms, shaping the discourse and the power of example on three important case studies from the conflict (EC/EU's declaratory diplomacy on the need for a just peace in the conflict...

  5. Shape evolution of gold nanoparticles

    International Nuclear Information System (INIS)

    Wang, Y. Q.; Liang, W. S.; Geng, C. Y.

    2010-01-01

    The tetraoctylammonium bromide-stabilized gold nanoparticles have been successfully fabricated. The shape evolution of these nanoparticles under different annealing temperatures has been investigated using high-resolution transmission electron microscopy. After an annealing at 100 o C for 30 min, the average diameters of the gold nanoparticles change a little. However, the shapes of gold nanoparticles change drastically, and facets appear in most nanoparticles. After an annealing at 200 o C for 30 min, not only the size but also the shape changes a lot. After an annealing at 300 o C for 30 min, two or more gold nanoparticles coalesce into bigger ones. In addition, because of the presence of Cu grid during the annealing, some gold particles become the nucleation sites of Cu 2 O nanocubes, which possess a microstructure of gold-particle core/Cu 2 O shell. These Au/Cu 2 O heterostructure nanocubes can only be formed at a relatively high temperature (≥300 o C). The results can provide some insights on controlling the shapes of gold nanoparticles.

  6. Shape coexistence in 74Se

    Czech Academy of Sciences Publication Activity Database

    Thiamová, Gabriela

    2001-01-01

    Roč. 51, č. 6 (2001), s. 553-556 ISSN 0011-4626 Institutional research plan: CEZ:AV0Z1048901 Keywords : shape coexistence * 74Se Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders Impact factor: 0.345, year: 2001

  7. What shapes social decision making?

    Science.gov (United States)

    Reader, Simon M; Leris, Ioannis

    2014-02-01

    Outcome transparency and the weight given to social information both play important roles in decision making, but we argue that an overarching influence is the degree to which individuals can and do gather information. Evolution, experience, and development may shape individual specializations in social decision making that carry over across contexts, and these individual differences may influence collective behavior and cultural evolution.

  8. Lorentz invariance in shape dynamics

    International Nuclear Information System (INIS)

    Carlip, S; Gomes, Henrique

    2015-01-01

    Shape dynamics is a reframing of canonical general relativity in which time reparametrization invariance is ‘traded’ for a local conformal invariance. We explore the emergence of Lorentz invariance in this model in three contexts: as a maximal symmetry, an asymptotic symmetry and a local invariance. (paper)

  9. Shape memory alloy based motor

    Indian Academy of Sciences (India)

    (Duerig et al 1990) of the alloy. Unlike conventional materials, which show only, limited effect on stress–strain behaviour (Duerig et al 1990; Mellor 1989), SMA shows marked temperature dependence, because of reversible austenite to martensite transformation. The underlying phenomenon of the shape memory effect is ...

  10. Shape-Memory Polymer Composites

    Science.gov (United States)

    Madbouly, Samy A.; Lendlein, Andreas

    The development of shape-memory polymer composites (SMPCs) enables high recovery stress levels as well as novel functions such as electrical conductivity, magnetism, and biofunctionality. In this review chapter the substantial enhancement in mechanical properties of shape-memory polymers (SMPs) by incorporating small amounts of stiff fillers will be highlighted exemplarily for clay and polyhedral oligomeric silsesquioxanes (POSS). Three different functions resulting from adding functional fillers to SMP-matrices will be introduced and discussed: magnetic SMPCs with different types of magnetic nanoparticles, conductive SMPCs based on carbon nanotubes (CNTs), carbon black (CB), short carbon fiber (SCF), and biofunctional SMPCs containing hydroxyapatite (HA). Indirect induction of the shape-memory effect (SME) was realized for magnetic and conductive SMPCs either by exposure to an alternating magnetic field or by application of electrical current. Major challenges in design and fundamental understanding of polymer composites are the complexity of the composite structure, and the relationship between structural parameters and properties/functions, which is essential for tailoring SMPCs for specific applications. Therefore the novel functions and enhanced properties of SMPCs will be described considering the micro-/nanostructural parameters, such as dimension, shape, distribution, volume fraction, and alignment of fillers as well as interfacial interaction between the polymer matrix and dispersed fillers. Finally, an outlook is given describing the future challenges of this exciting research field as well as potential applications including automotive, aerospace, sensors, and biomedical applications.

  11. Banana-shaped Liquid Crystals

    NARCIS (Netherlands)

    Achten, R.

    2006-01-01

    This thesis describes the liquid crystalline properties of molecules with a bent shape. The objective of the research is to allow further insight in structure-property relationships for this class of liquid crystals. Specifically, we are interested in chemically stable

  12. Shape analysis of synthetic diamond

    CERN Document Server

    Mullan, C

    1997-01-01

    Two-dimensional images of synthetic industrial diamond particles were obtained using a camera, framegrabber and PC-based image analysis software. Various methods for shape quantification were applied, including two-dimensional shape factors, Fourier series expansion of radius as a function of angle, boundary fractal analysis, polygonal harmonics, and comer counting methods. The shape parameter found to be the most relevant was axis ratio, defined as the ratio of the minor axis to the major axis of the ellipse with the same second moments of area as the particle. Axis ratio was used in an analysis of the sorting of synthetic diamonds on a vibrating table. A model was derived based on the probability that a particle of a given axis ratio would travel to a certain bin. The model described the sorting of bulk material accurately but it was found not to be applicable if the shape mix of the feed material changed dramatically. This was attributed to the fact that the particle-particle interference was not taken int...

  13. How Faults Shape the Earth.

    Science.gov (United States)

    Bykerk-Kauffman, Ann

    1992-01-01

    Presents fault activity with an emphasis on earthquakes and changes in continent shapes. Identifies three types of fault movement: normal, reverse, and strike faults. Discusses the seismic gap theory, plate tectonics, and the principle of superposition. Vignettes portray fault movement, and the locations of the San Andreas fault and epicenters of…

  14. Shape and Dimensions of Ripples

    DEFF Research Database (Denmark)

    Jacobsen, Niels Gjøl

    In this work, the flow and bed load transport over ripple profiles under the influence of oscillatory will be investigated. The investigation is made through a parametric study, where the bed shape and the ripple steepness are varied. For the sediment transport, the Shields parameter relative to ...

  15. SHAPE CHARACTERIZATION OF CONCRETE AGGREGATE

    Directory of Open Access Journals (Sweden)

    Jing Hu

    2011-05-01

    Full Text Available As a composite material, the performance of concrete materials can be expected to depend on the properties of the interfaces between its two major components, aggregate and cement paste. The microstructure at the interfacial transition zone (ITZ is assumed to be different from the bulk material. In general, properties of conventional concrete have been found favoured by optimum packing density of the aggregate. Particle size is a common denominator in such studies. Size segregation in the ITZ among the binder particles in the fresh state, observed in simulation studies by concurrent algorithm-based SPACE system, additionally governs density as well as physical bonding capacity inside these shell-like zones around aggregate particles. These characteristics have been demonstrated qualitatively pertaining also after maturation of the concrete. Such properties of the ITZs have direct impact on composite properties. Despite experimental approaches revealed effects of aggregate grain shape on different features of material structure (among which density, and as a consequence on mechanical properties, it is still an underrated factor in laboratory studies, probably due to the general feeling that a suitable methodology for shape characterization is not available. A scientific argument hindering progress is the interconnected nature of size and shape. Presently, a practical problem preventing shape effects to be emphasized is the limitation of most computer simulation systems in concrete technology to spherical particles. New developments at Delft University of Technology will make it possible in the near future to generate jammed states, or other high-density fresh particle mixtures of non-spherical particles, which thereupon can be subjected to hydration algorithms. This paper will sketch the outlines of a methodological approach for shape assessment of loose (non-embedded aggregate grains, and demonstrate its use for two types of aggregate, allowing

  16. Design optimization of shape memory alloy structures

    NARCIS (Netherlands)

    Langelaar, M.

    2006-01-01

    This thesis explores the possibilities of design optimization techniques for designing shape memory alloy structures. Shape memory alloys are materials which, after deformation, can recover their initial shape when heated. This effect can be used for actuation. Emerging applications for shape memory

  17. Shape memory polymer actuator and catheter

    Science.gov (United States)

    Maitland, Duncan J.; Lee, Abraham P.; Schumann, Daniel L.; Matthews, Dennis L.; Decker, Derek E.; Jungreis, Charles A.

    2004-05-25

    An actuator system is provided for acting upon a material in a vessel. The system includes an optical fiber and a shape memory polymer material operatively connected to the optical fiber. The shape memory polymer material is adapted to move from a first shape for moving through said vessel to a second shape where it can act upon said material.

  18. Shape memory polymer actuator and catheter

    Energy Technology Data Exchange (ETDEWEB)

    Maitland, Duncan J. (Pleasant Hill, CA); Lee, Abraham P. (Walnut Creek, CA); Schumann, Daniel L. (Concord, CA); Matthews, Dennis L. (Moss Beach, CA); Decker, Derek E. (Byron, CA); Jungreis, Charles A. (Pittsburgh, PA)

    2007-11-06

    An actuator system is provided for acting upon a material in a vessel. The system includes an optical fiber and a shape memory polymer material operatively connected to the optical fiber. The shape memory polymer material is adapted to move from a first shape for moving through said vessel to a second shape where it can act upon said material.

  19. Ugo Fano, Enrico Fermi, and spectral line shapes

    Science.gov (United States)

    Clark, Charles W.

    2005-03-01

    Ugo Fano's 1961 paper on spectral line shapes^1 was recently ranked as the third highest in citation impact of all papers published in the entire Physical Review series.^2 In the course of preparing an article for a NIST Centennial volume,^3 I became interested in the history of the results presented in Fano’s seminal paper, and will present my findings in this talk. An amusing sidelight concerns the role played by Enrico Fermi in the development of the famous ``Fano profile'' formula. I had been told this story by Fano when I was his graduate student, but uncertain of my recollection of the details, I did not publish it in his obituary.^4 I later learned that the archives of the Royal Society of London contain Fano's own written version of the tale, which will be presented in this talk. The story sheds light on the nature of Enrico Fermi's interactions with his students, and confirms accounts concerning the way in which he did his theoretical work.^5 ^1 U. Fano,``Effects of Configuration Interaction on Intensities and Phase Shifts,'' Phys. Rev. 124, 1866-1878 (1961)^2 S. Redner, physics/0407137 (2004)^3 http://nvl.nist.gov/pub/nistpubs/sp958-lide/116-119.pdf^4 C. W. Clark, Nature 410, 164 (2001)^5 F. Rasetti, in Collected Papers, vol. I, E. Fermi (University of Chicago Press, 1962), p. 178

  20. Isogeometric Shape Optimization of Vibrating Membranes

    DEFF Research Database (Denmark)

    Nguyen, Dang Manh; Evgrafov, Anton; Gersborg, Allan Roulund

    2011-01-01

    We consider a model problem of isogeometric shape optimization of vibrating membranes whose shapes are allowed to vary freely. The main obstacle we face is the need for robust and inexpensive extension of a B-spline parametrization from the boundary of a domain onto its interior, a task which has...... perform a number of numerical experiments with our isogeometric shape optimization algorithm and present smooth, optimized membrane shapes. Our conclusion is that isogeometric analysis fits well with shape optimization....

  1. Specification of ROP flux shape

    Energy Technology Data Exchange (ETDEWEB)

    Min, Byung Joo [Korea Atomic Energy Research Institute, Taejon (Korea, Republic of); Gray, A. [Atomic Energy of Canada Ltd., Chalk River, ON (Canada)

    1997-06-01

    The CANDU 9 480/SEU core uses 0.9% SEU (Slightly Enriched Uranium) fuel. The use f SEU fuel enables the reactor to increase the radial power form factor from 0.865, which is typical in current natural uranium CANDU reactors, to 0.97 in the nominal CANDU 9 480/SEU core. The difference is a 12% increase in reactor power. An additional 5% increase can be achieved due to a reduced refuelling ripple. The channel power limits were also increased by 3% for a total reactor power increase of 20%. This report describes the calculation of neutron flux distributions in the CANDU 9 480/SEU core under conditions specified by the C and I engineers. The RFSP code was used to calculate of neutron flux shapes for ROP analysis. Detailed flux values at numerous potential detector sites were calculated for each flux shape. (author). 6 tabs., 70 figs., 4 refs.

  2. Engineering Cell Shape and Function

    Science.gov (United States)

    Singhvi, Rahul; Kumar, Amit; Lopez, Gabriel P.; Stephanopoulos, Gregory N.; Wang, Daniel I. C.; Whitesides, George M.; Ingber, Donald E.

    1994-04-01

    An elastomeric stamp, containing defined features on the micrometer scale, was used to imprint gold surfaces with specific patterns of self-assembled monolayers of alkanethiols and, thereby, to create islands of defined shape and size that support extracellular matrix protein adsorption and cell attachment. Through this technique, it was possible to place cells in predetermined locations and arrays, separated by defined distances, and to dictate their shape. Limiting the degree of cell extension provided control over cell growth and protein secretion. This method is experimentally simple and highly adaptable. It should be useful for applications in biotechnology that require analysis of individual cells cultured at high density or repeated access to cells placed in specified locations.

  3. Shape-Shifting Droplet Networks.

    Science.gov (United States)

    Zhang, T; Wan, Duanduan; Schwarz, J M; Bowick, M J

    2016-03-11

    We consider a three-dimensional network of aqueous droplets joined by single lipid bilayers to form a cohesive, tissuelike material. The droplets in these networks can be programed to have distinct osmolarities so that osmotic gradients generate internal stresses via local fluid flows to cause the network to change shape. We discover, using molecular dynamics simulations, a reversible folding-unfolding process by adding an osmotic interaction with the surrounding environment which necessarily evolves dynamically as the shape of the network changes. This discovery is the next important step towards osmotic robotics in this system. We also explore analytically and numerically how the networks become faceted via buckling and how quasi-one-dimensional networks become three dimensional.

  4. New trends in shape optimization

    CERN Document Server

    Leugering, Günter

    2015-01-01

    This volume reflects “New Trends in Shape Optimization” and is based on a workshop of the same name organized at the Friedrich-Alexander University Erlangen-Nürnberg in September 2013. During the workshop senior mathematicians and young scientists alike presented their latest findings. The format of the meeting allowed fruitful discussions on challenging open problems, and triggered a number of new and spontaneous collaborations. As such, the idea was born to produce this book, each chapter of which was written by a workshop participant, often with a collaborator. The content of the individual chapters ranges from survey papers to original articles; some focus on the topics discussed at the Workshop, while others involve arguments outside its scope but which are no less relevant for the field today. As such, the book offers readers a balanced introduction to the emerging field of shape optimization.

  5. Shape analysis with subspace symmetries

    KAUST Repository

    Berner, Alexander

    2011-04-01

    We address the problem of partial symmetry detection, i.e., the identification of building blocks a complex shape is composed of. Previous techniques identify parts that relate to each other by simple rigid mappings, similarity transforms, or, more recently, intrinsic isometries. Our approach generalizes the notion of partial symmetries to more general deformations. We introduce subspace symmetries whereby we characterize similarity by requiring the set of symmetric parts to form a low dimensional shape space. We present an algorithm to discover subspace symmetries based on detecting linearly correlated correspondences among graphs of invariant features. We evaluate our technique on various data sets. We show that for models with pronounced surface features, subspace symmetries can be found fully automatically. For complicated cases, a small amount of user input is used to resolve ambiguities. Our technique computes dense correspondences that can subsequently be used in various applications, such as model repair and denoising. © 2010 The Author(s).

  6. Shape coexistence in 153Ho

    Science.gov (United States)

    Pramanik, Dibyadyuti; Sarkar, S.; Saha Sarkar, M.; Bisoi, Abhijit; Ray, Sudatta; Dasgupta, Shinjinee; Chakraborty, A.; Krishichayan, Kshetri, Ritesh; Ray, Indrani; Ganguly, S.; Pradhan, M. K.; Ray Basu, M.; Raut, R.; Ganguly, G.; Ghugre, S. S.; Sinha, A. K.; Basu, S. K.; Bhattacharya, S.; Mukherjee, A.; Banerjee, P.; Goswami, A.

    2016-08-01

    The high-spin states in 153Ho have been studied by the La57(20Ne139,6 n ) reaction at a projectile energy of 139 MeV at the Variable Energy Cyclotron Centre (VECC), Kolkata, India, utilizing an earlier campaign of the Indian National Gamma Array (INGA) setup. Data from γ -γ coincidence, directional correlation, and polarization measurements have been analyzed to assign and confirm the spins and parities of the levels. We have suggested a few additions and revisions of the reported level scheme of 153Ho. The RF-γ time difference spectra have been useful to confirm the half-life of an isomer in this nucleus. From the comparison of experimental and theoretical results, it is found that there are definite indications of shape coexistence in this nucleus. The experimental and calculated lifetimes of several isomers have been compared to follow the coexistence and evolution of shape with increasing spin.

  7. Box-shaped halophilic bacteria.

    OpenAIRE

    Javor, B; Requadt, C; Stoeckenius, W

    1982-01-01

    Three morphologically similar strains of halophilic, box-shaped procaryotes have been isolated from brines collected in the Sinai, Baja California (Mexico), and southern California (United States). Although the isolates in their morphology resemble Walsby's square bacteria, which are a dominant morphological type in the Red Sea and Baja California brines, they are probably not identical to them. The cells show the general characteristics of extreme halophiles and archaebacteria. They contain ...

  8. Dumbbell Shaped Transforaminal Paravertebral Meningioma

    Directory of Open Access Journals (Sweden)

    ismail serifoglu

    2015-03-01

    Full Text Available Dumbbell tumors are tumors of two or more regions of the spinal column. The majority of the dumbbell tumors are schwannomas. The presentation of spinal meningiomas as a dumbbell tumors are very rare. The diagnosis of Dumbbell-shaped meningiomas with imaging methods is important for preoperative accurate treatment planning and to prevent its postsurgical recurrences. [Cukurova Med J 2015; 40(Suppl 1: 38-41

  9. Strategic Planning: Shaping Future Success

    Science.gov (United States)

    2016-09-01

    Defense AT&L: September-October 2016 46 Strategic Planning Shaping Future Success Brian Schultz “What’s the use of running if you are not on the...fielding, the PM may also be planning for future increments, sustainment and other long-term ef- forts. Strategic planning can help the PM position these...future programs and actions for good outcomes. So what is this strategic planning all about? Let’s start with some background, including a strategic

  10. Expansion lyre-shaped tube

    International Nuclear Information System (INIS)

    Andro, Jean.

    1973-01-01

    The invention relates the expansion lyre-shaped tube portions formed in dudgeoned tubular bundles between two bottom plates. An expansion lyre comprises at least two sets of tubes of unequal lengths coplanar and symmetrical with respect to the main tube axis, with connecting portions between the tubes forming said sets. The invention applies to apparatus such as heat exchangers, heaters, superheaters or breeders [fr

  11. Optimum shapes for pump limiters

    International Nuclear Information System (INIS)

    Ulrickson, M.

    1982-05-01

    The design of a pump limiter depends strongly on the details of the plasma scrapeoff zone. A model has been developed which allows the transport coefficients in the scrapeoff to be functions of n and t. This model has been used to predict scrapeoff profiles for FED/INTOR. The profiles are used to find and analyze limiter profiles. The results suggest the use of limiter shapes which curve toward the plasma

  12. Remark on shape invariant potential

    International Nuclear Information System (INIS)

    Drigo Filho, Elso; Ricotta, Regina Maria

    1997-01-01

    For more than a decade, Supersymmetry has provided new information about ordinary quantum mechanical problems, and Supersymmetric Quantum Mechanics has become a field research by itself. If has been shown that the symmetry between two different systems that share energy spectra can be interpreted in terms of supersymmetry. From the knowledge of the ground state of a given potential it is possible to find another potential with the same energy spectrum, except for the ground state. In fact, from the use of supersymmetric partner Hamiltonians and their degeneracy spectra it has become possible to determine a ladder of Hamiltonians and their spectra, only through the ground states of the ladder. Concerning the partner Hamiltonians with potentials V + and V - that are similar in shape but Differ in the parameters. Gedenshtein introduced in 1983 the concept of shape invariance. Here we propose an extension of this concept. It is formulated in terms of the functional form of the whole super-family and not only between any two members of the ladder. We give two examples where all the members of the super-family can be written in a general functional form and conclude that Gedenshtein's conditions of shape invariance is sufficient but not necessary in order to obtain the super-family. (author)

  13. Body shape preferences: associations with rater body shape and sociosexuality.

    Directory of Open Access Journals (Sweden)

    Michael E Price

    Full Text Available There is accumulating evidence of condition-dependent mate choice in many species, that is, individual preferences varying in strength according to the condition of the chooser. In humans, for example, people with more attractive faces/bodies, and who are higher in sociosexuality, exhibit stronger preferences for attractive traits in opposite-sex faces/bodies. However, previous studies have tended to use only relatively simple, isolated measures of rater attractiveness. Here we use 3D body scanning technology to examine associations between strength of rater preferences for attractive traits in opposite-sex bodies, and raters' body shape, self-perceived attractiveness, and sociosexuality. For 118 raters and 80 stimuli models, we used a 3D scanner to extract body measurements associated with attractiveness (male waist-chest ratio [WCR], female waist-hip ratio [WHR], and volume-height index [VHI] in both sexes and also measured rater self-perceived attractiveness and sociosexuality. As expected, WHR and VHI were important predictors of female body attractiveness, while WCR and VHI were important predictors of male body attractiveness. Results indicated that male rater sociosexuality scores were positively associated with strength of preference for attractive (low VHI and attractive (low WHR in female bodies. Moreover, male rater self-perceived attractiveness was positively associated with strength of preference for low VHI in female bodies. The only evidence of condition-dependent preferences in females was a positive association between attractive VHI in female raters and preferences for attractive (low WCR in male bodies. No other significant associations were observed in either sex between aspects of rater body shape and strength of preferences for attractive opposite-sex body traits. These results suggest that among male raters, rater self-perceived attractiveness and sociosexuality are important predictors of preference strength for

  14. Forming of shape memory composite structures

    DEFF Research Database (Denmark)

    Santo, Loredana; Quadrini, Fabrizio; De Chiffre, Leonardo

    2013-01-01

    tomography. Final shape memory composite panels were mechanically tested by three point bending before and after a shape memory step. This step consisted of a compression to reduce the panel thickness up to 60%. At the end of the bending test the panel shape was recovered by heating and a new memory step...... was performed with a higher thickness reduction. Memory steps were performed at room temperature and 120 °C so as to test the foam core in the glassy and rubbery state, respectively. Shape memory tests revealed the ability of the shape memory composite structures to recover the initial shape also after severe......A new forming procedure was developed to produce shape memory composite structures having structural composite skins over a shape memory polymer core. Core material was obtained by solid state foaming of an epoxy polyester resin with remarkably shape memory properties. The composite skin consisted...

  15. Instance-Based Generative Biological Shape Modeling.

    Science.gov (United States)

    Peng, Tao; Wang, Wei; Rohde, Gustavo K; Murphy, Robert F

    2009-01-01

    Biological shape modeling is an essential task that is required for systems biology efforts to simulate complex cell behaviors. Statistical learning methods have been used to build generative shape models based on reconstructive shape parameters extracted from microscope image collections. However, such parametric modeling approaches are usually limited to simple shapes and easily-modeled parameter distributions. Moreover, to maximize the reconstruction accuracy, significant effort is required to design models for specific datasets or patterns. We have therefore developed an instance-based approach to model biological shapes within a shape space built upon diffeomorphic measurement. We also designed a recursive interpolation algorithm to probabilistically synthesize new shape instances using the shape space model and the original instances. The method is quite generalizable and therefore can be applied to most nuclear, cell and protein object shapes, in both 2D and 3D.

  16. 78 FR 72713 - Notice Pursuant to the National Cooperative Research and Production Act of 1993-3D PDF Consortium...

    Science.gov (United States)

    2013-12-03

    ... Production Act of 1993--3D PDF Consortium, Inc. Notice is hereby given that, on October 31, 2013, pursuant to Section 6(a) of the National Cooperative Research and Production Act of 1993, 15 U.S.C. 4301 et seq. (``the Act''), 3D PDF Consortium, Inc. (``3D PDF'') has filed written notifications simultaneously with...

  17. 77 FR 38831 - Notice Pursuant to the National Cooperative Research and Production Act of 1993-3D PDF Consortium...

    Science.gov (United States)

    2012-06-29

    ... Production Act of 1993--3D PDF Consortium, Inc. Notice is hereby given that, on June 4, 2012, pursuant to Section 6(a) of the National Cooperative Research and Production Act of 1993, 15 U.S.C. 4301 et seq. (``the Act''), 3D PDF Consortium, Inc. (``3D PDF'') has filed written notifications simultaneously with...

  18. Joint Scalar versus Joint Velocity-Scalar PDF Simulations of Bluff-Body Stabilized Flames with REDIM

    NARCIS (Netherlands)

    Merci, B.; Naud, B.; Roekaerts, D.; Maas, U.

    2008-01-01

    Two transported PDF strategies, joint velocity-scalar PDF (JVSPDF) and joint scalar PDF (JSPDF), are investigated for bluff-body stabilized jet-type turbulent diffusion flames with a variable degree of turbulence–chemistry interaction. Chemistry is modeled by means of the novel reaction-diffusion

  19. Investigation of interfacial shear stresses, shape fixity, and actuation strain in composites incorporating shape memory polymers and shape memory alloys

    Science.gov (United States)

    Park, Jungkyu; Headings, Leon; Dapino, Marcelo; Baur, Jeffery; Tandon, Gyaneshwar

    2015-03-01

    Shape memory composites (SMCs) based on shape memory alloys (SMAs) and shape memory polymers (SMPs) allow many design possibilities due to their controllable temperature-dependent mechanical properties. The complementary characteristics of SMAs and SMPs can be utilized in systems with shape recovery created by the SMA and shape fixity provided by the SMP. In this research, three SMC operating regimes are identified and the behavior of SMC structures is analyzed by focusing on composite shape fixity and interfacial stresses. Analytical models show that SMPs can be used to adequately fix the shape of SMA actuators and springs. COMSOL finite element simulations are in agreement with analytical expressions for shape fixity and interfacial stresses. Analytical models are developed for an end-coupled linear SMP-SMA two-way actuator and the predicted strain is shown to be in good agreement with experimental test results.

  20. Cartography of irregularly shaped satellites

    Science.gov (United States)

    Batson, R. M.; Edwards, Kathleen

    1987-01-01

    Irregularly shaped satellites, such as Phobos and Amalthea, do not lend themselves to mapping by conventional methods because mathematical projections of their surfaces fail to convey an accurate visual impression of the landforms, and because large and irregular scale changes make their features difficult to measure on maps. A digital mapping technique has therefore been developed by which maps are compiled from digital topographic and spacecraft image files. The digital file is geometrically transformed as desired for human viewing, either on video screens or on hard copy. Digital files of this kind consist of digital images superimposed on another digital file representing the three-dimensional form of a body.

  1. The circadian neuropeptide PDF signals preferentially through a specific adenylate cyclase isoform AC3 in M pacemakers of Drosophila.

    Directory of Open Access Journals (Sweden)

    Laura B Duvall

    Full Text Available The neuropeptide Pigment Dispersing Factor (PDF is essential for normal circadian function in Drosophila. It synchronizes the phases of M pacemakers, while in E pacemakers it decelerates their cycling and supports their amplitude. The PDF receptor (PDF-R is present in both M and subsets of E cells. Activation of PDF-R stimulates cAMP increases in vitro and in M cells in vivo. The present study asks: What is the identity of downstream signaling components that are associated with PDF receptor in specific circadian pacemaker neurons? Using live imaging of intact fly brains and transgenic RNAi, we show that adenylate cyclase AC3 underlies PDF signaling in M cells. Genetic disruptions of AC3 specifically disrupt PDF responses: they do not affect other Gs-coupled GPCR signaling in M cells, they can be rescued, and they do not represent developmental alterations. Knockdown of the Drosophila AKAP-like scaffolding protein Nervy also reduces PDF responses. Flies with AC3 alterations show behavioral syndromes consistent with known roles of M pacemakers as mediated by PDF. Surprisingly, disruption of AC3 does not alter PDF responses in E cells--the PDF-R(+ LNd. Within M pacemakers, PDF-R couples preferentially to a single AC, but PDF-R association with a different AC(s is needed to explain PDF signaling in the E pacemakers. Thus critical pathways of circadian synchronization are mediated by highly specific second messenger components. These findings support a hypothesis that PDF signaling components within target cells are sequestered into "circadian signalosomes," whose compositions differ between E and M pacemaker cell types.

  2. Shape Memory Effect Actuators from Chlorides Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Shape Change Technologies is developing a radical new technique for the fabrication of Shape Memory alloys, such as TiNi and its ternary alloys of Hf, Zr, and Cu....

  3. Joint shape segmentation with linear programming

    KAUST Repository

    Huang, Qixing

    2011-01-01

    We present an approach to segmenting shapes in a heterogenous shape database. Our approach segments the shapes jointly, utilizing features from multiple shapes to improve the segmentation of each. The approach is entirely unsupervised and is based on an integer quadratic programming formulation of the joint segmentation problem. The program optimizes over possible segmentations of individual shapes as well as over possible correspondences between segments from multiple shapes. The integer quadratic program is solved via a linear programming relaxation, using a block coordinate descent procedure that makes the optimization feasible for large databases. We evaluate the presented approach on the Princeton segmentation benchmark and show that joint shape segmentation significantly outperforms single-shape segmentation techniques. © 2011 ACM.

  4. Edge energies and shapes of nanoprecipitates.

    Energy Technology Data Exchange (ETDEWEB)

    Hamilton, John C.

    2006-01-01

    In this report we present a model to explain the size-dependent shapes of lead nano-precipitates in aluminum. Size-dependent shape transitions, frequently observed at nanolength scales, are commonly attributed to edge energy effects. This report resolves an ambiguity in the definition and calculation of edge energies and presents an atomistic calculation of edge energies for free clusters. We also present a theory for size-dependent shapes of Pb nanoprecipitates in Al, introducing the concept of ''magic-shapes'' defined as precipitate shapes having near zero elastic strains when inserted into similarly shaped voids in the Al matrix. An algorithm for constructing a complete set of magic-shapes is presented. The experimental observations are explained by elastic strain energies and interfacial energies; edge energies play a negligible role. We replicate the experimental observations by selecting precipitates having magic-shapes and interfacial energies less than a cutoff value.

  5. Pulse shaping using a spatial light modulator

    CSIR Research Space (South Africa)

    Botha, N

    2009-07-01

    Full Text Available Femtosecond pulse shaping can be done by different kinds of pulse shapers, such as liquid crystal spatial light modulators (LC SLM), acousto optic modulators (AOM) and deformable and movable mirrors. A few applications where pulse shaping...

  6. The limiting shape of a full mailbox

    Czech Academy of Sciences Publication Activity Database

    Formentin, Marco; Swart, Jan M.

    2016-01-01

    Roč. 13, č. 2 (2016), s. 1151-1164 ISSN 1980-0436 R&D Projects: GA ČR GAP201/12/2613 Institutional support: RVO:67985556 Keywords : Self-organized criticality * Gabrielli and Caldarelli queueing model * Barabasi queueing model * email communication Subject RIV: BA - General Mathematics Impact factor: 0.382, year: 2016 http://library.utia.cas.cz/separaty/2016/SI/swart-0469224.pdf

  7. Shaping Air Mobility Forces for Future Relevance

    Science.gov (United States)

    2017-01-01

    other decision makers. Each paper can also be a valuable tool for defining further research. These studies are available elec- tronically or in...two different aircraft. Barring mir- acles, future advances in propulsion and airframe designs may make for more elegant solutions to these missions...www.tradoc.army. mil/tpubs/pams/tp525-3-1.pdf. 10. The DOD defines oversize air cargo as “exceeding the usable dimension of a 463L [air cargo] pallet loaded to

  8. Shaping drops with textured surfaces

    Science.gov (United States)

    Ehlinger, Quentin; Biance, Anne-Laure; Ybert, Christophe

    2017-11-01

    When a drop impacts a substrate, it can behave differently depending on the nature of the surface and of the liquid (spreading, bouncing, resting, splashing ...). Understanding these behaviors is crucial to predict the drop morphology during and after impact. Whereas surface wettability has extensively been studied, the effect of surface roughness remains hardly explored. In this work, we consider the impact of a drop in a pure non-wetting situation by using superheated substrates i.e. in the Leidenfrost regime. The surface texture consists of a well-controlled microscopic defect shaped with photolithography on a smooth silicon wafer. Different regimes are observed, depending on the distance between the defect and the impact point and the defect size. Comparing the lamella thickness versus the defect height proves relevant as the transition criteria between regimes. Others characteristics of the drop behavior (direction of satellite droplet ejection, lamella rupture) are also well captured by inertial/capillary models. Drop impacts on multiple defects are also investigated and drop shape well predicted considering the interactions between the local flow and the defects.

  9. Justifications shape ethical blind spots.

    Science.gov (United States)

    Pittarello, Andrea; Leib, Margarita; Gordon-Hecker, Tom; Shalvi, Shaul

    2015-06-01

    To some extent, unethical behavior results from people's limited attention to ethical considerations, which results in an ethical blind spot. Here, we focus on the role of ambiguity in shaping people's ethical blind spots, which in turn lead to their ethical failures. We suggest that in ambiguous settings, individuals' attention shifts toward tempting information, which determines the magnitude of their lies. Employing a novel ambiguous-dice paradigm, we asked participants to report the outcome of the die roll appearing closest to the location of a previously presented fixation cross on a computer screen; this outcome would determine their pay. We varied the value of the die second closest to the fixation cross to be either higher (i.e., tempting) or lower (i.e., not tempting) than the die closest to the fixation cross. Results of two experiments revealed that in ambiguous settings, people's incorrect responses were self-serving. Tracking participants' eye movements demonstrated that people's ethical blind spots are shaped by increased attention toward tempting information. © The Author(s) 2015.

  10. Acoustic echoes reveal room shape.

    Science.gov (United States)

    Dokmanic, Ivan; Parhizkar, Reza; Walther, Andreas; Lu, Yue M; Vetterli, Martin

    2013-07-23

    Imagine that you are blindfolded inside an unknown room. You snap your fingers and listen to the room's response. Can you hear the shape of the room? Some people can do it naturally, but can we design computer algorithms that hear rooms? We show how to compute the shape of a convex polyhedral room from its response to a known sound, recorded by a few microphones. Geometric relationships between the arrival times of echoes enable us to "blindfoldedly" estimate the room geometry. This is achieved by exploiting the properties of Euclidean distance matrices. Furthermore, we show that under mild conditions, first-order echoes provide a unique description of convex polyhedral rooms. Our algorithm starts from the recorded impulse responses and proceeds by learning the correct assignment of echoes to walls. In contrast to earlier methods, the proposed algorithm reconstructs the full 3D geometry of the room from a single sound emission, and with an arbitrary geometry of the microphone array. As long as the microphones can hear the echoes, we can position them as we want. Besides answering a basic question about the inverse problem of room acoustics, our results find applications in areas such as architectural acoustics, indoor localization, virtual reality, and audio forensics.

  11. Shaping the Future of Surgery

    Science.gov (United States)

    Callcut, Rachael A.; Breslin, Tara M.

    2006-01-01

    Objective: To educate surgeons about the growth of the private regulatory movement and its potential implications for the practice of surgery. Methods: An in-depth analysis and literature review of one of the largest private regulatory groups, the Leapfrog Group, provides a model for understanding the impact of these groups on the practice of surgery. A detailed discussion of the history, mission, structure, and quality initiatives of Leapfrog is included. Results: Private regulatory groups are using quality standards as a method for controlling the rising cost of health care. Traditionally, little financial support, manpower, or incentives have existed for individual surgeons and hospitals to report and maintain their own outcomes data. However, as surgical outcomes have increasingly become the target of quality improvement initiatives, the need to measure performance is gaining importance. Surgical quality has been both a direct target of private regulation, as illustrated by the evidence-based hospital referral guidelines of Leapfrog, and an indirect target with initiatives like computerized physician order entry and ICU staffing guidelines. Conclusions: Private regulation is rapidly reshaping the way we practice and teach surgery. It is almost a certainty that their power, popularity, financial support, and missions will all continue to expand. As surgeons, we must decide soon if we wish to be an active participant in shaping the movement or, rather, if we are going to let it shape us by remaining largely uninvolved. PMID:16495692

  12. Shape-memory actuated gimbal

    Science.gov (United States)

    Carpenter, Bernie F.; Head, R. J.; Gehling, Russ

    1995-05-01

    Future spacecraft systems will require advanced positioning systems to meet stringent reliability, vibration, lightweighting, and cost requirements. Current devices employing stepping motor and gear reduction assemblies may not be able to meet future design needs. A shape memory alloy (SMA) actuated multiaxis gimbal has been developed that provides solutions to these mechanism issues. SMAs utilize a thermally activated reversible phase transformation to recover their original heat-treated shape or to generate high-recovery stresses. when heated above a critical transformation temperature. NiTiCu alloy wires have been wound into helical spring actuators to control gimbal rotation using mechanical elements to convert the linear motion of antagonistic SMA springs into rotation. Analytical models that incorporate the nonlinear hysteretic behavior of SMAs have been generated to aid in spring design and SMA conditioning. Indirect resistive hearing of SMA springs was accomplished using programmable power supplies. A potentiometer sensor attached to the output axis of the gimbal was used to provide angular feedback to a digital controller. An antagonistic approach was used to independently control heating and cooling of the opposing spring element for improved stability and bandwidth response. Proportional-integral derivative control was implemented on the active SMA spring to obtain the desired level of rotation while overcoming an external load. Mechanical testing was conducted on the gimbal to assess control system stability, dynamic response, and power requirements. Torque in excess of 3 in./lb was generated using less than 20 watts of applied power.

  13. Hydraulics of free overfall in -shaped channels

    Indian Academy of Sciences (India)

    R. Narasimhan (Krishtel eMaging) 1461 1996 Oct 15 13:05:22

    MS received 15 October 2001; revised 13 February 2002. Abstract. In this paper, two methods are presented to analyse the free overfall in. -shaped (equilateral triangle-shaped) channels. First, the flow upstream of a free overfall from smooth horizontal or mildly sloping -shaped channels is analysed theoretically to ...

  14. Shape memory alloys – characterization techniques

    Indian Academy of Sciences (India)

    Abstract. Shape memory alloys are the generic class of alloys that show both thermal and mechan- ical memory. The basic physics involved in the shape memory effect is the reversible thermoelastic martensitic transformation. In general, there exists two phases in shape memory alloys, viz., a high- temperature phase or ...

  15. Shape memory alloys – characterization techniques

    Indian Academy of Sciences (India)

    Shape memory alloys are the generic class of alloys that show both thermal and mechanical memory. The basic physics involved in the shape memory effect is the reversible thermoelastic martensitic transformation. In general, there exists two phases in shape memory alloys, viz., a hightemperature phase or austenitic ...

  16. General quadrupole nuclear shapes. An algebraic perspective

    Energy Technology Data Exchange (ETDEWEB)

    Leviatan, A. (Los Alamos National Lab. (LANL), NM (USA). Theoretical Div.); Shao Bin (Yale Univ., New Haven, CT (USA). Sloane Physics Lab.)

    1990-07-05

    Spherical, axial and non-axial quadrupole shapes are investigated within the algebraic interacting boson model. For each shape the hamiltonian is resolved into intrinsic and collective parts, normal modes are identified and intrinsic states are constructed. Special emphasis is paid to new features (e.g. rigid triaxiality and coexisting deformed shapes) that emerge in the presence of three-body interactions. (orig.).

  17. General quadrupole nuclear shapes. An algebraic perspective

    International Nuclear Information System (INIS)

    Leviatan, A.; Shao Bin

    1990-01-01

    Spherical, axial and non-axial quadrupole shapes are investigated within the algebraic interacting boson model. For each shape the hamiltonian is resolved into intrinsic and collective parts, normal modes are identified and intrinsic states are constructed. Special emphasis is paid to new features (e.g. rigid triaxiality and coexisting deformed shapes) that emerge in the presence of three-body interactions. (orig.)

  18. Active Shape Analysis of Mandibular Growth

    DEFF Research Database (Denmark)

    Hilger, Klaus Baggesen; Larsen, Rasmus; Kreiborg, Sven

    2003-01-01

    Active Shape Model is proposed targeting growth modelling by applying Partial Least Squares regression in decomposing the Procrustes tangent space. Shape centroid size is applied as dependent variable but the method generalizes to handle other, both uni- and multivariate, effects probing for high...... covariation wrt. shape variation....

  19. Shape recovery and irrecoverable strain control in polyurethane shape-memory polymer

    International Nuclear Information System (INIS)

    Tobushi, Hisaaki; Ejiri, Yoshihiro; Hayashi, Syunichi; Hoshio, Kazumasa

    2008-01-01

    In shape-memory polymers, large strain can be fixed at a low temperature and thereafter recovered at a high temperature. If the shape-memory polymer is held at a high temperature for a long time, the irrecoverable strain can attain a new intermediate shape between the shape under the maximum stress and the primary shape. Irrecoverable strain control can be applied to the fabrication of a shape-memory polymer element with a complex shape in a simple method. In the present study, the influence of the strain-holding conditions on the shape recovery and the irrecoverable strain control in polyurethane shape-memory polymer is investigated by tension test of a film and three-point bending test of a sheet. The higher the shape-holding temperature and the longer the shape-holding time, the higher the irrecoverable strain rate. The equation that expresses the characteristics of the irrecoverable strain control is formulated

  20. Shape recovery and irrecoverable strain control in polyurethane shape-memory polymer

    Directory of Open Access Journals (Sweden)

    Hisaaki Tobushi et al

    2008-01-01

    Full Text Available In shape-memory polymers, large strain can be fixed at a low temperature and thereafter recovered at a high temperature. If the shape-memory polymer is held at a high temperature for a long time, the irrecoverable strain can attain a new intermediate shape between the shape under the maximum stress and the primary shape. Irrecoverable strain control can be applied to the fabrication of a shape-memory polymer element with a complex shape in a simple method. In the present study, the influence of the strain-holding conditions on the shape recovery and the irrecoverable strain control in polyurethane shape-memory polymer is investigated by tension test of a film and three-point bending test of a sheet. The higher the shape-holding temperature and the longer the shape-holding time, the higher the irrecoverable strain rate. The equation that expresses the characteristics of the irrecoverable strain control is formulated.

  1. Vertical overlap of probability density functions of cloud and precipitation hydrometeors: CLOUD AND PRECIPITATION PDF OVERLAP

    Energy Technology Data Exchange (ETDEWEB)

    Ovchinnikov, Mikhail [Pacific Northwest National Laboratory, Richland Washington USA; Lim, Kyo-Sun Sunny [Pacific Northwest National Laboratory, Richland Washington USA; Korea Atomic Energy Research Institute, Daejeon Republic of Korea; Larson, Vincent E. [Department of Mathematical Sciences, University of Wisconsin-Milwaukee, Milwaukee Wisconsin USA; Wong, May [Pacific Northwest National Laboratory, Richland Washington USA; National Center for Atmospheric Research, Boulder Colorado USA; Thayer-Calder, Katherine [National Center for Atmospheric Research, Boulder Colorado USA; Ghan, Steven J. [Pacific Northwest National Laboratory, Richland Washington USA

    2016-11-05

    Coarse-resolution climate models increasingly rely on probability density functions (PDFs) to represent subgrid-scale variability of prognostic variables. While PDFs characterize the horizontal variability, a separate treatment is needed to account for the vertical structure of clouds and precipitation. When sub-columns are drawn from these PDFs for microphysics or radiation parameterizations, appropriate vertical correlations must be enforced via PDF overlap specifications. This study evaluates the representation of PDF overlap in the Subgrid Importance Latin Hypercube Sampler (SILHS) employed in the assumed PDF turbulence and cloud scheme called the Cloud Layers Unified By Binormals (CLUBB). PDF overlap in CLUBB-SILHS simulations of continental and tropical oceanic deep convection is compared with overlap of PDF of various microphysics variables in cloud-resolving model (CRM) simulations of the same cases that explicitly predict the 3D structure of cloud and precipitation fields. CRM results show that PDF overlap varies significantly between different hydrometeor types, as well as between PDFs of mass and number mixing ratios for each species, - a distinction that the current SILHS implementation does not make. In CRM simulations that explicitly resolve cloud and precipitation structures, faster falling species, such as rain and graupel, exhibit significantly higher coherence in their vertical distributions than slow falling cloud liquid and ice. These results suggest that to improve the overlap treatment in the sub-column generator, the PDF correlations need to depend on hydrometeor properties, such as fall speeds, in addition to the currently implemented dependency on the turbulent convective length scale.

  2. Iterative PDF Estimation-Based Multiuser Diversity Detection and Channel Estimation with Unknown Interference

    Directory of Open Access Journals (Sweden)

    Veselinovic Nenad

    2005-01-01

    Full Text Available The equivalent diversity order of multiuser detector employing multiple receive antennas and minimum mean squared error (MMSE processing for frequency-selective channels is decreased if it aims at suppressing unknown cochannel interference (UCCI while detecting multiple users' signals. This is an unavoidable consequence of linear processing at the receiver. In this paper, we propose a new multiuser signal detection scheme with the aim to preserve the detector's diversity order by taking into account the structure of the UCCI. We use the fact that the structure of the UCCI appears in the probability density function (PDF of the UCCI plus noise, which can be characterized as multimodal Gaussian. A kernel smoothing PDF estimation based receiver is derived. The PDF estimation can be based on training symbols only (noniterative PDF estimation or on training symbols as well as feedback from the decoder (iterative PDF estimation. It is verified through simulations that the proposed receiver significantly outperforms the conventional covariance estimation in channels with low frequency selectivity. The iterative PDF estimation significantly outperforms the noniterative PDF estimation-based receiver with minor training overhead.

  3. Shape Memory of Human Red Blood Cells

    OpenAIRE

    Fischer, Thomas M.

    2004-01-01

    The human red cell can be deformed by external forces but returns to the biconcave resting shape after removal of the forces. If after such shape excursions the rim is always formed by the same part of the membrane, the cell is said to have a memory of its biconcave shape. If the rim can form anywhere on the membrane, the cell would have no shape memory. The shape memory was probed by an experiment called go-and-stop. Locations on the membrane were marked by spontaneously adhering latex spher...

  4. Shape theory categorical methods of approximation

    CERN Document Server

    Cordier, J M

    2008-01-01

    This in-depth treatment uses shape theory as a ""case study"" to illustrate situations common to many areas of mathematics, including the use of archetypal models as a basis for systems of approximations. It offers students a unified and consolidated presentation of extensive research from category theory, shape theory, and the study of topological algebras.A short introduction to geometric shape explains specifics of the construction of the shape category and relates it to an abstract definition of shape theory. Upon returning to the geometric base, the text considers simplical complexes and

  5. Shape separation of gold nanorods using centrifugation

    Science.gov (United States)

    Sharma, Vivek; Park, Kyoungweon; Srinivasarao, Mohan

    2009-01-01

    We demonstrate the use of centrifugation for efficient separation of colloidal gold nanorods from a mixture of nanorods and nanospheres. We elucidate the hydrodynamic behavior of nanoparticles of various shapes and illustrate that the shape-dependent drag causes particles to have shape-dependent sedimentation behavior. During centrifugation, nanoparticles undergo Brownian motion under an external field and move with different sedimentation velocities dictated by their Svedberg coefficients. This effects a separation of particles of different shape and size. Our theoretical analysis and experiments demonstrate the viability of using centrifugation to shape-separate a mixture of colloidal particles. PMID:19255445

  6. Shape Memory Composite Hybrid Hinge

    Science.gov (United States)

    Fang, Houfei; Im, Eastwood; Lin, John; Scarborough, Stephen

    2012-01-01

    There are two conventional types of hinges for in-space deployment applications. The first type is mechanically deploying hinges. A typical mechanically deploying hinge is usually composed of several tens of components. It is complicated, heavy, and bulky. More components imply higher deployment failure probability. Due to the existence of relatively moving components among a mechanically deploying hinge, it unavoidably has microdynamic problems. The second type of conventional hinge relies on strain energy for deployment. A tape-spring hinge is a typical strain energy hinge. A fundamental problem of a strain energy hinge is that its deployment dynamic is uncontrollable. Usually, its deployment is associated with a large impact, which is unacceptable for many space applications. Some damping technologies have been experimented with to reduce the impact, but they increased the risks of an unsuccessful deployment. Coalescing strain energy components with shape memory composite (SMC) components to form a hybrid hinge is the solution. SMCs are well suited for deployable structures. A SMC is created from a high-performance fiber and a shape memory polymer resin. When the resin is heated to above its glass transition temperature, the composite becomes flexible and can be folded or packed. Once cooled to below the glass transition temperature, the composite remains in the packed state. When the structure is ready to be deployed, the SMC component is reheated to above the glass transition temperature, and it returns to its as-fabricated shape. A hybrid hinge is composed of two strain energy flanges (also called tape-springs) and one SMC tube. Two folding lines are placed on the SMC tube to avoid excessive strain on the SMC during folding. Two adapters are used to connect the hybrid hinge to its adjacent structural components. While the SMC tube is heated to above its glass transition temperature, a hybrid hinge can be folded and stays at folded status after the temperature

  7. Shape memory alloy consortium (SMAC)

    Science.gov (United States)

    Jacot, A. Dean

    1999-07-01

    The application of smart structures to helicopter rotors has received widespread study in recent years. This is one of the major thrusts of the Shape Memory Alloy Consortium (SMAC) program. SMAC includes 3 companies and 4 Universities in a cost sharing consortium funded under DARPA Smart Materials and Structures program. This paper describes the objective of the SMAC effort, and its relationship to a previous DARPA smart structure rotorcraft program from which it originated. The SMAC program includes NiTinol fatigue/characterization studies, SMA actuator development, and ferromagnetic SMA material development. The paper summarizes the SMAC effort, and includes background and details on Boeing's development of a SMA torsional actuator for rotorcraft applications. SMA actuation is used to retwist the rotorcraft blade in flight, and result in a significant payload increase for either helicopters or tiltrotors. This paper is also augmented by several other papers in this conference with specific results from other SMAC consortium members.

  8. The perfect shape spiral stories

    CERN Document Server

    Hammer, Øyvind

    2016-01-01

    This book uses the spiral shape as a key to a multitude of strange and seemingly disparate stories about art, nature, science, mathematics, and the human endeavour. In a way, the book is itself organized as a spiral, with almost disconnected chapters circling around and closing in on the common theme. A particular strength of the book is its extremely cross-disciplinary nature - everything is fun, and everything is connected! At the same time, the author puts great emphasis on mathematical and scientific correctness, in contrast, perhaps, with some earlier books on spirals. Subjects include the mathematical properties of spirals, sea shells, sun flowers, Greek architecture, air ships, the history of mathematics, spiral galaxies, the anatomy of the human hand, the art of prehistoric Europe, Alfred Hitchcock, and spider webs, to name a few.

  9. Shape memory thermal conduction switch

    Science.gov (United States)

    Vaidyanathan, Rajan (Inventor); Krishnan, Vinu (Inventor); Notardonato, William U. (Inventor)

    2010-01-01

    A thermal conduction switch includes a thermally-conductive first member having a first thermal contacting structure for securing the first member as a stationary member to a thermally regulated body or a body requiring thermal regulation. A movable thermally-conductive second member has a second thermal contacting surface. A thermally conductive coupler is interposed between the first member and the second member for thermally coupling the first member to the second member. At least one control spring is coupled between the first member and the second member. The control spring includes a NiTiFe comprising shape memory (SM) material that provides a phase change temperature <273 K, a transformation range <40 K, and a hysteresis of <10 K. A bias spring is between the first member and the second member. At the phase change the switch provides a distance change (displacement) between first and second member by at least 1 mm, such as 2 to 4 mm.

  10. Active Light Shaping using GPC

    DEFF Research Database (Denmark)

    Glückstad, Jesper; Palima, Darwin; Villangca, Mark Jayson

    Generalized Phase Contrast (GPC) is a light efficient method for generating speckle-free contiguous optical distributions using binary-only or analog phase levels. It has been used in applications such as optical trapping and manipulation, active microscopy, structured illumination, optical secur...... the active light shaping of a supercontinuum laser over most of the visible wavelength range.......Generalized Phase Contrast (GPC) is a light efficient method for generating speckle-free contiguous optical distributions using binary-only or analog phase levels. It has been used in applications such as optical trapping and manipulation, active microscopy, structured illumination, optical...... security, parallel laser marking and labelling and recently in contemporary biophotonics applications such as for adaptive and parallel two-photon optogenetics and neurophotonics. We will present our most recent GPC developments geared towards these applications. First, a compact GPC Light Shaper...

  11. Optimal shapes of compact strings

    International Nuclear Information System (INIS)

    Maritan, A.; Micheletti, C.; Trovato, A.; Banavar, J.R.

    2000-07-01

    Optimal geometrical arrangements, such as the stacking of atoms, are of relevance in diverse disciplines. A classic problem is the determination of the optimal arrangement of spheres in three dimensions in order to achieve the highest packing fraction; only recently has it been proved that the answer for infinite systems is a face-centred-cubic lattice. This simply stated problem has had a profound impact in many areas, ranging from the crystallization and melting of atomic systems, to optimal packing of objects and subdivision of space. Here we study an analogous problem-that of determining the optimal shapes of closely packed compact strings. This problem is a mathematical idealization of situations commonly encountered in biology, chemistry and physics, involving the optimal structure of folded polymeric chains. We find that, in cases where boundary effects are not dominant, helices with a particular pitch-radius ratio are selected. Interestingly, the same geometry is observed in helices in naturally-occurring proteins. (author)

  12. HOW PARTICIPATION SHAPES LOCAL DEVELOPMENT

    Directory of Open Access Journals (Sweden)

    Muhadjir Darwin

    2016-12-01

    Full Text Available This article elaborates citizens’ participation in shaping local development in the Indonesian context. The main question is how to make local development more participatory as a guarantee that citizens’ rights are fully realized. In that respects, social accountability is a key that should be improved from supply and demand sides simultaneously. From the supply side, there is a need to reform local governance, in order to improve the quality of local regulations, local planning, local budgeting, and local public service provision. While from the demand side, there is a need to empower local citizens so that they are engaged in five forms or local development efforts: local regulation formulation, local development planning, local budgeting, community driven development, and public service provision.

  13. Children Literature: Shaping Gender Identities

    Directory of Open Access Journals (Sweden)

    IQRA JABEEN

    2014-02-01

    Full Text Available The aim of this paper is to analyze stereotype construction of gender roles in the text of children's stories which inculcate in the children’s crude minds socially developed gender differences. For this purpose, the study followed Dell Hymes’ speaking model. This model has sixteen components that can be applied to different types of Discourse (speech interaction: message form; message content; setting; scene; Speaker/sender; address or; the hearer/receiver/audience; addressee; purposes (outcomes; purposes (goals; key; channels; forms of speech; norms of interaction; norms of interpretation; and genres. Selected children's stories were analyzed to identify their role as primary thought developing sources in the mind of young learners thus shaping their gender identities. This study would be beneficial in drawing the attention of authors, editors and writers of children's literature to redefine gender roles in order to minimize gender differences.

  14. The Use of PDF/A in Digital Archives: A Case Study from Archaeology

    Directory of Open Access Journals (Sweden)

    Tim N. L. Evans

    2014-10-01

    Full Text Available In recent years the Portable Document Format (PDF has become a ubiquitous format in the exchange of documents; in 2005 the PDF/A profile was defined in order to meet long term accessibility needs, and has accordingly come to be regarded as a long-term archiving strategy for PDF files. In the field of archaeology, a growing number of PDF files – containing the detailed results of fieldwork and research – are beginning to be deposited with digital archives such as the Archaeology Data Service (ADS. In the ADS’ experience, the use of PDF/A has had benefits as well as drawbacks: the majority of PDF reports are now in a standard format better suited to longer-term access, however migrating to PDF/A and managing and ensuring reuse of these files is intensive, and fraught with potential pitfalls. Of these, perhaps the most serious has been an unreliability in PDF/A conformance by the wide range of tools and software now available. There are also practical and more theoretical implications for reuse which, as our discipline of archaeology alongside so many others rapidly becomes digitized, presents us with a large corpus of ‘data’ that is human readable, but may not be amenable to machine-based technologies such as NLP. It may be argued that these factors effectively undermine some of the perceived cost benefit of moving from paper to digital, as well as the longer-term sustainability of PDF/A within digital archives.

  15. Nanoparticle shape, thermodynamics and kinetics

    International Nuclear Information System (INIS)

    Marks, L D; Peng, L

    2016-01-01

    Nanoparticles can be beautiful, as in stained glass windows, or they can be ugly as in wear and corrosion debris from implants. We estimate that there will be about 70 000 papers in 2015 with nanoparticles as a keyword, but only one in thirteen uses the nanoparticle shape as an additional keyword and research focus, and only one in two hundred has thermodynamics. Methods for synthesizing nanoparticles have exploded over the last decade, but our understanding of how and why they take their forms has not progressed as fast. This topical review attempts to take a critical snapshot of the current understanding, focusing more on methods to predict than a purely synthetic or descriptive approach. We look at models and themes which are largely independent of the exact synthetic method whether it is deposition, gas-phase condensation, solution based or hydrothermal synthesis. Elements are old dating back to the beginning of the 20th century—some of the pioneering models developed then are still relevant today. Others are newer, a merging of older concepts such as kinetic-Wulff constructions with methods to understand minimum energy shapes for particles with twins. Overall we find that while there are still many unknowns, the broad framework of understanding and predicting the structure of nanoparticles via diverse Wulff constructions, either thermodynamic, local minima or kinetic has been exceedingly successful. However, the field is still developing and there remain many unknowns and new avenues for research, a few of these being suggested towards the end of the review. (topical review)

  16. Contextual predictability shapes signal autonomy.

    Science.gov (United States)

    Winters, James; Kirby, Simon; Smith, Kenny

    2018-03-10

    Aligning on a shared system of communication requires senders and receivers reach a balance between simplicity, where there is a pressure for compressed representations, and informativeness, where there is a pressure to be communicatively functional. We investigate the extent to which these two pressures are governed by contextual predictability: the amount of contextual information that a sender can estimate, and therefore exploit, in conveying their intended meaning. In particular, we test the claim that contextual predictability is causally related to signal autonomy: the degree to which a signal can be interpreted in isolation, without recourse to contextual information. Using an asymmetric communication game, where senders and receivers are assigned fixed roles, we manipulate two aspects of the referential context: (i) whether or not a sender shares access to the immediate contextual information used by the receiver in interpreting their utterance; (ii) the extent to which the relevant solution in the immediate referential context is generalisable to the aggregate set of contexts. Our results demonstrate that contextual predictability shapes the degree of signal autonomy: when the context is highly predictable (i.e., the sender has access to the context in which their utterances will be interpreted, and the semantic dimension which discriminates between meanings in context is consistent across communicative episodes), languages develop which rely heavily on the context to reduce uncertainty about the intended meaning. When the context is less predictable, senders favour systems composed of autonomous signals, where all potentially relevant semantic dimensions are explicitly encoded. Taken together, these results suggest that our pragmatic faculty, and how it integrates information from the context in reducing uncertainty, plays a central role in shaping language structure. Copyright © 2018 Elsevier B.V. All rights reserved.

  17. Nanoparticle shape, thermodynamics and kinetics

    Science.gov (United States)

    Marks, L. D.; Peng, L.

    2016-02-01

    Nanoparticles can be beautiful, as in stained glass windows, or they can be ugly as in wear and corrosion debris from implants. We estimate that there will be about 70 000 papers in 2015 with nanoparticles as a keyword, but only one in thirteen uses the nanoparticle shape as an additional keyword and research focus, and only one in two hundred has thermodynamics. Methods for synthesizing nanoparticles have exploded over the last decade, but our understanding of how and why they take their forms has not progressed as fast. This topical review attempts to take a critical snapshot of the current understanding, focusing more on methods to predict than a purely synthetic or descriptive approach. We look at models and themes which are largely independent of the exact synthetic method whether it is deposition, gas-phase condensation, solution based or hydrothermal synthesis. Elements are old dating back to the beginning of the 20th century—some of the pioneering models developed then are still relevant today. Others are newer, a merging of older concepts such as kinetic-Wulff constructions with methods to understand minimum energy shapes for particles with twins. Overall we find that while there are still many unknowns, the broad framework of understanding and predicting the structure of nanoparticles via diverse Wulff constructions, either thermodynamic, local minima or kinetic has been exceedingly successful. However, the field is still developing and there remain many unknowns and new avenues for research, a few of these being suggested towards the end of the review.

  18. SU-F-T-94: Plan2pdf - a Software Tool for Automatic Plan Report for Philips Pinnacle TPS

    International Nuclear Information System (INIS)

    Wu, C

    2016-01-01

    Purpose: To implement an automatic electronic PDF plan reporting tool for Philips Pinnacle treatment planning system (TPS) Methods: An electronic treatment plan reporting software is developed by us to enable fully automatic PDF report from Pinnacle TPS to external EMR programs such as MOSAIQ. The tool is named “plan2pdf”. plan2pdf is implemented using Pinnacle scripts, Java and UNIX shell scripts, without any external program needed. plan2pdf supports full auto-mode and manual mode reporting. In full auto-mode, with a single mouse click, plan2pdf will generate a detailed Pinnacle plan report in PDF format, which includes customizable cover page, Pinnacle plan summary, orthogonal views through each plan POI and maximum dose point, DRR for each beam, serial transverse views captured throughout the dose grid at a user specified interval, DVH and scorecard windows. The final PDF report is also automatically bookmarked for each section above for convenient plan review. The final PDF report can either be saved on a user specified folder on Pinnacle, or it can be automatically exported to an EMR import folder via a user configured FTP service. In manual capture mode, plan2pdf allows users to capture any Pinnacle plan by full screen, individual window or rectangular ROI drawn on screen. Furthermore, to avoid possible patients’ plan mix-up during auto-mode reporting, a user conflict check feature is included in plan2pdf: it prompts user to wait if another patient is being exported by plan2pdf by another user. Results: plan2pdf is tested extensively and successfully at our institution consists of 5 centers, 15 dosimetrists and 10 physicists, running Pinnacle version 9.10 on Enterprise servers. Conclusion: plan2pdf provides a highly efficient, user friendly and clinical proven platform for all Philips Pinnacle users, to generate a detailed plan report in PDF format for external EMR systems.

  19. Synthesis of shape memory alloys using electrodeposition

    Science.gov (United States)

    Hymer, Timothy Roy

    Shape memory alloys are used in a variety of applications. The area of micro-electro-mechanical systems (MEMS) is a developing field for thin film shape memory alloys for making actuators, valves and pumps. Until recently thin film shape memory alloys could only be made by rapid solidification or sputtering techniques which have the disadvantage of being "line of sight". At the University of Missouri-Rolla, electrolytic techniques have been developed that allow the production of shape memory alloys in thin film form. The advantages of this techniques are in-situ, non "line of sight" and the ability to make differing properties of the shape memory alloys from one bath. This research focused on the electrodeposition of In-Cd shape memory alloys. The primary objective was to characterize the electrodeposited shape memory effect for an electrodeposited shape memory alloy. The effect of various operating parameters such as peak current density, temperature, pulsing, substrate and agitation were investigated and discussed. The electrodeposited alloys were characterized by relative shape memory effect, phase transformation, morphology and phases present. Further tests were performed to optimize the shape memory by the use of a statistically designed experiment. An optimized shape memory effect for an In-Cd alloy is reported for the conditions of the experiments.

  20. Confinement optimisation by plasma shaping on TCV

    International Nuclear Information System (INIS)

    Moret, J.M.; Behn, R.; Franke, S.; Hofmann, F.; Weisen, H.

    1997-01-01

    Any improvement in the energy confinement time of a tokamak reactor may facilitate its access to ignition. TCV has the unique capability of creating a wide variety of plasma shapes and can therefore investigate to which extent an appropriate choice of the plasma shape can improve the energy confinement time. For simple shapes defined only by their elongation and triangularity, it has already been observed on TCV that the confinement properties of the plasma depend strongly on the shape. This previous work has now been extended to include more complex shapes and higher elongations, in order firstly to test the applicability of the previously proposed explanation for the shape dependence of the confinement time and secondly to propose new shapes which offer a substantial gain on their confinement characteristics. (author) 4 figs., 1 tab., 2 refs

  1. Updated Methods for Seed Shape Analysis.

    Science.gov (United States)

    Cervantes, Emilio; Martín, José Javier; Saadaoui, Ezzeddine

    2016-01-01

    Morphological variation in seed characters includes differences in seed size and shape. Seed shape is an important trait in plant identification and classification. In addition it has agronomic importance because it reflects genetic, physiological, and ecological components and affects yield, quality, and market price. The use of digital technologies, together with development of quantification and modeling methods, allows a better description of seed shape. Image processing systems are used in the automatic determination of seed size and shape, becoming a basic tool in the study of diversity. Seed shape is determined by a variety of indexes (circularity, roundness, and J index). The comparison of the seed images to a geometrical figure (circle, cardioid, ellipse, ellipsoid, etc.) provides a precise quantification of shape. The methods of shape quantification based on these models are useful for an accurate description allowing to compare between genotypes or along developmental phases as well as to establish the level of variation in different sets of seeds.

  2. Updated Methods for Seed Shape Analysis

    Directory of Open Access Journals (Sweden)

    Emilio Cervantes

    2016-01-01

    Full Text Available Morphological variation in seed characters includes differences in seed size and shape. Seed shape is an important trait in plant identification and classification. In addition it has agronomic importance because it reflects genetic, physiological, and ecological components and affects yield, quality, and market price. The use of digital technologies, together with development of quantification and modeling methods, allows a better description of seed shape. Image processing systems are used in the automatic determination of seed size and shape, becoming a basic tool in the study of diversity. Seed shape is determined by a variety of indexes (circularity, roundness, and J index. The comparison of the seed images to a geometrical figure (circle, cardioid, ellipse, ellipsoid, etc. provides a precise quantification of shape. The methods of shape quantification based on these models are useful for an accurate description allowing to compare between genotypes or along developmental phases as well as to establish the level of variation in different sets of seeds.

  3. U-Shaped Interest in U-Shaped Development--and What It Means

    Science.gov (United States)

    Siegler, Robert S.

    2004-01-01

    Interest in U-shaped development has itself undergone a U-shaped progression. Twenty-five years ago, interest in U-shaped development was high. This interest was evident at a 1978 conference in Tel Aviv on "U-shaped Behavioral Growth" that resulted in the publication of a book of the same title 4 years later (Strauss, 1982). The breadth…

  4. PDF Calculations of Turbulent CH4 Flames with Detailed Chemistry using In Situ Adaptive Tabulation

    Science.gov (United States)

    Saxena, Vivek; Pope, Stephen B.

    1996-11-01

    It is now generally accepted that the probability density function (PDF) approach is the most suited method for turbulent-reactive flows since complex reactions can be treated without modeling assumptions. Integration of detailed chemistry in PDF methods, however, has generally been prohibitively expensive computationally. The technique of In Situ Adaptive Tabulation (ISAT) allows us to accomplish this integration since it can reduce the required computer time by three orders of magnitude. The results of calculations for non-premixed piloted jet diffusion CH4 flames are presented. These calculations are the first successful attempt at representing detailed kinetics in PDF calculations of methane flames.

  5. The high energy asymptotic behavior of line shape cross sections and detailed balance

    International Nuclear Information System (INIS)

    Although line shape relaxation cross sections in the ''impact approximation'' do not obey detailed balance except in the very high temperature limit, they can be shown, in the Born approximation, to satisfy a somewhat similar asymptotic relation. In this empiric relation, first observed by Boissoles et al. [J. Chem. Phys. 90, 5392 (1989)], the complex conjugate of the cross section for the radiative transition if→i'f' is asymptotically equal to the cross section for the inverse transition i'f'→if. It is then shown that although cross sections calculated with the presumably more correct Fano collision operator also obey this relation, due to time reversal symmetry they also obey detailed balance. These two observations taken together imply that the imaginary part of line shape relaxation cross sections in the more exact theory decay much more rapidly with energy than the real parts and suggest a quick fix for relaxation cross sections calculated in the ''impact approximation,'' or as it is sometimes called, the Shafer--Gordon formalism. Numerical calculations of inelastic off-the-energy shell scattering of simple rigid spherelike models support these results and suggest that off-the-energy shell calculations with realistic models are not only desirable but also necessary for computing line shapes of partially overlapping lines

  6. The probability density function (PDF) of Lagrangian Turbulence

    Science.gov (United States)

    Birnir, B.

    2012-12-01

    The statistical theory of Lagrangian turbulence is derived from the stochastic Navier-Stokes equation. Assuming that the noise in fully-developed turbulence is a generic noise determined by the general theorems in probability, the central limit theorem and the large deviation principle, we are able to formulate and solve the Kolmogorov-Hopf equation for the invariant measure of the stochastic Navier-Stokes equations. The intermittency corrections to the scaling exponents of the structure functions require a multiplicative (multipling the fluid velocity) noise in the stochastic Navier-Stokes equation. We let this multiplicative noise, in the equation, consists of a simple (Poisson) jump process and then show how the Feynmann-Kac formula produces the log-Poissonian processes, found by She and Leveque, Waymire and Dubrulle. These log-Poissonian processes give the intermittency corrections that agree with modern direct Navier-Stokes simulations (DNS) and experiments. The probability density function (PDF) plays a key role when direct Navier-Stokes simulations or experimental results are compared to theory. The statistical theory of turbulence is determined, including the scaling of the structure functions of turbulence, by the invariant measure of the Navier-Stokes equation and the PDFs for the various statistics (one-point, two-point, N-point) can be obtained by taking the trace of the corresponding invariant measures. Hopf derived in 1952 a functional equation for the characteristic function (Fourier transform) of the invariant measure. In distinction to the nonlinear Navier-Stokes equation, this is a linear functional differential equation. The PDFs obtained from the invariant measures for the velocity differences (two-point statistics) are shown to be the four parameter generalized hyperbolic distributions, found by Barndorff-Nilsen. These PDF have heavy tails and a convex peak at the origin. A suitable projection of the Kolmogorov-Hopf equations is the

  7. Morte materna mascarada: um caminho para sua identificação Muerte materna enmascarada: un camino para su identificación Identification of concealed or presumable maternal deaths

    Directory of Open Access Journals (Sweden)

    Flávia Azevedo Gomes

    2006-12-01

    Full Text Available OBJETIVO: verificar a presença de mortes maternas mascaradas ou presumíveis a partir de procedimentos obstétricos e diagnósticos secundários registrados no Sistema de Informações Hospitalares do Sistema Único de Saúde (SIH-SUS, nos Estados de São Paulo, Paraná, Pará, Ceará e Mato Grosso, nos anos de 1999 e 2000. MÉTODOS: utilizamos dados secundários dos CD-ROMs Movimento de Autorização de Internação Hospitalar (AIH do Sistema Único de Saúde, por meio de formulários das Autorização (AIHs. RESULTADOS: identificamos 651 mortes maternas declaradas pelo sistema e 55 foram mortes maternas mascaradas ou presumíveis, obtidas a partir de procedimentos obstétricos e diagnósticos secundários pertencentes ao Capítulo XV da CID 10 - Gravidez, parto e puerpério, registrados no SIH-SUS. CONCLUSÃO: o presente estudo revelou que tal sistema de informação pode ser utilizado como medida complementar para a identificação de mortes maternas não informadas.OBJETIVO: verificar la presencia de muertes maternas enmascaradas o presumibles a partir de procedimientos obstétricos y diagnósticos secundarios registrados en el Sistema de Informaciones Hospitalarios del Sistema Único de Salud (SIH-SUS, en los Estados de São Paulo, Paraná, Pará, Ceará e Mato Grosso, en los años de 1999 y 2000. MÉTODOS: utilizamos datos secundarios de los CD-ROMs Movimiento de Autorización de Internamiento Hospitalario (AIH del Sistema Único de Salud, por medio de formularios de las AIHs. RESULTADOS: identificamos 651 muertes maternas declaradas en el sistema y 55 fueron muertes maternas enmascaradas o presumibles, obtenidas a partir de procedimientos obstétricos y diagnósticos secundarios pertenecientes al Capítulo XV de la CID 10 - Embarazo, parto y puerperio, registrados en el SIH-SUS. CONCLUSIÓN: el presente estudio reveló que tal sistema de información puede ser utilizado como medida complementaria para la identificación de muertes

  8. Supernova Explosions Stay In Shape

    Science.gov (United States)

    2009-12-01

    At a very early age, children learn how to classify objects according to their shape. Now, new research suggests studying the shape of the aftermath of supernovas may allow astronomers to do the same. A new study of images from NASA's Chandra X-ray Observatory on supernova remnants - the debris from exploded stars - shows that the symmetry of the remnants, or lack thereof, reveals how the star exploded. This is an important discovery because it shows that the remnants retain information about how the star exploded even though hundreds or thousands of years have passed. "It's almost like the supernova remnants have a 'memory' of the original explosion," said Laura Lopez of the University of California at Santa Cruz, who led the study. "This is the first time anyone has systematically compared the shape of these remnants in X-rays in this way." Astronomers sort supernovas into several categories, or "types", based on properties observed days after the explosion and which reflect very different physical mechanisms that cause stars to explode. But, since observed remnants of supernovas are leftover from explosions that occurred long ago, other methods are needed to accurately classify the original supernovas. Lopez and colleagues focused on the relatively young supernova remnants that exhibited strong X-ray emission from silicon ejected by the explosion so as to rule out the effects of interstellar matter surrounding the explosion. Their analysis showed that the X-ray images of the ejecta can be used to identify the way the star exploded. The team studied 17 supernova remnants both in the Milky Way galaxy and a neighboring galaxy, the Large Magellanic Cloud. For each of these remnants there is independent information about the type of supernova involved, based not on the shape of the remnant but, for example, on the elements observed in it. The researchers found that one type of supernova explosion - the so-called Type Ia - left behind relatively symmetric, circular

  9. Pathways to Shape the Bioeconomy

    Directory of Open Access Journals (Sweden)

    Carmen Priefer

    2017-02-01

    Full Text Available In view of the increasing depletion of fossil fuel resources, the concept “bioeconomy” aims at the gradual replacement of fossil fuels by renewable feedstock. Seen as a comprehensive societal transition, the bioeconomy is a complex field that includes a variety of sectors, actors, and interests and is related to far-reaching changes in today’s production systems. While the objectives pursued—such as reducing dependence on fossil fuels, mitigating climate change, ensuring global food security, and increasing the industrial use of biogenic resources—are not generally contentious, there is fierce controversy over the possible pathways for achieving these objectives. Based on a thorough literature review, the article identifies major lines of conflict in the current discourse. Criticism of the prevalent concept refers mainly to the strong focus on technology, the lack of consideration given to alternative implementation pathways, the insufficient differentiation of underlying sustainability requirements, and the inadequate participation of societal stakeholders. Since today it cannot be predicted which pathway will be the most expedient—the one already being taken or one of the others proposed—this paper suggests pursuing a strategy of diversity concerning the approaches to shape the bioeconomy, the funding of research topics, and the involvement of stakeholders.

  10. Wedding ring shaped excitation coil

    Science.gov (United States)

    MacLennan, Donald A.; Tsai, Peter

    2001-01-01

    A high frequency inductively coupled electrodeless lamp includes an excitation coil with an effective electrical length which is less than one half wavelength of a driving frequency applied thereto, preferably much less. The driving frequency may be greater than 100 MHz and is preferably as high as 915 MHz. Preferably, the excitation coil is configured as a non-helical, semi-cylindrical conductive surface having less than one turn, in the general shape of a wedding ring. At high frequencies, the current in the coil forms two loops which are spaced apart and parallel to each other. Configured appropriately, the coil approximates a Helmholtz configuration. The lamp preferably utilizes an bulb encased in a reflective ceramic cup with a pre-formed aperture defined therethrough. The ceramic cup may include structural features to aid in alignment and/or a flanged face to aid in thermal management. The lamp head is preferably an integrated lamp head comprising a metal matrix composite surrounding an insulating ceramic with the excitation integrally formed on the ceramic. A novel solid-state oscillator preferably provides RF power to the lamp. The oscillator is a single active element device capable of providing over 70 watts of power at over 70% efficiency.

  11. Structural reconstruction of the catalytic center of LiPDF through multiple scattering calculation with MXAN

    International Nuclear Information System (INIS)

    Guo Xiaoyun; Chu Wangsheng; Ma Sixuan; Gong Weimin; Benfatto, Maurizio; Hu Tiandou; Xie Yaning; Wu Ziyu

    2006-01-01

    Peptide deformylase (PDF, EC 3.5.1.27) is essential for the normal growth of eubacterium but not for mammalians. Recently, PDF has been studied as a target for new antibiotics. In this paper, X-ray absorption spectroscopy was employed to determine the local structure around the zinc ion of PDF from Leptospira Interrogans in dry powder, because it is very difficult to obtain the crystallized sample of LiPDF. We performed X-ray absorption near edge structure (XANES) calculation and reconstructed successfully the local geometry of the active center, and the results from calculations show that a water molecule (Wat1) has moved towards the zinc ion and lies in the distance range to coordinate with the zinc ion weakly. In addition, the sensitivity of theoretical spectra to the different ligand bodies was evaluated in terms of goodness-of-fit

  12. Structural reconstruction of the catalytic center of LiPDF through multiple scattering calculation with MXAN

    Energy Technology Data Exchange (ETDEWEB)

    Guo Xiaoyun [Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, CAS, 100049 Beijing (China); School of Life Science, Key Laboratory of Structural Biology, University of Science and Technology of China, 230026 Hefei, Anhui (China); Chu Wangsheng [Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, CAS, 100049 Beijing (China); Department of Physics, University of Science and Technology of China, 230026 Hefei, Anhui (China); Ma Sixuan [Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, CAS, 100049 Beijing (China); Gong Weimin [National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 100101 Beijing (China); Benfatto, Maurizio [Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, P.O. Box 13, 00044 Frascati (Italy); Hu Tiandou [Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, CAS, 100049 Beijing (China); Xie Yaning [Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, CAS, 100049 Beijing (China); Wu Ziyu [Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, CAS, 100049 Beijing (China) and Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, P.O. Box 13, 00044 Frascati (Italy)]. E-mail: wuzy@mail.ihep.ac.cn

    2006-11-15

    Peptide deformylase (PDF, EC 3.5.1.27) is essential for the normal growth of eubacterium but not for mammalians. Recently, PDF has been studied as a target for new antibiotics. In this paper, X-ray absorption spectroscopy was employed to determine the local structure around the zinc ion of PDF from Leptospira Interrogans in dry powder, because it is very difficult to obtain the crystallized sample of LiPDF. We performed X-ray absorption near edge structure (XANES) calculation and reconstructed successfully the local geometry of the active center, and the results from calculations show that a water molecule (Wat1) has moved towards the zinc ion and lies in the distance range to coordinate with the zinc ion weakly. In addition, the sensitivity of theoretical spectra to the different ligand bodies was evaluated in terms of goodness-of-fit.

  13. Non-Zero Mean PDF Solution of Nonlinear Oscillators Due to Poisson White Noise

    Science.gov (United States)

    Er, G. K.; Iu, V. P.; Zhu, H. T.; Kou, K. P.

    2010-05-01

    This paper presents a solution procedure for the PDF solution of the response of nonlinear oscillators under Poisson white noise. The exponential-polynomial closure (EPC) method is employed to fulfill this task. A van der Pol oscillator and a Duffing oscillator are further investigated in the case of nonzero mean response, respectively. When the polynomial order n increases to 6, the result of the EPC method is in good agreement with the simulation, particularly in the tail region of the PDF. The analysis shows that the non-zero mean PDF is not symmetrically distributed about its mean unlike the case of the zero-mean PDF. The numerical analysis also shows that the result obtained with the EPC method (n = 2) is same as that from equivalent linearization method with which the result differs significantly from the simulation result.

  14. Comparison of two threshold detection criteria methodologies for determination of probe positivity for intraoperative in situ identification of presumed abnormal 18F-FDG-avid tissue sites during radioguided oncologic surgery.

    Science.gov (United States)

    Chapman, Gregg J; Povoski, Stephen P; Hall, Nathan C; Murrey, Douglas A; Lee, Robert; Martin, Edward W

    2014-09-13

    Intraoperative in situ identification of (18)F-FDG-avid tissue sites during radioguided oncologic surgery remains a significant challenge for surgeons. The purpose of our study was to evaluate the 1.5-to-1 ratiometric threshold criteria method versus the three-sigma statistical threshold criteria method for determination of gamma detection probe positivity for intraoperative in situ identification of presumed abnormal (18)F-FDG-avid tissue sites in a manner that was independent of the specific type of gamma detection probe used. From among 52 patients undergoing appropriate in situ evaluation of presumed abnormal (18)F-FDG-avid tissue sites during (18)F-FDG-directed surgery using 6 available gamma detection probe systems, a total of 401 intraoperative gamma detection probe measurement sets of in situ counts per second measurements were cumulatively taken. For the 401 intraoperative gamma detection probe measurement sets, probe positivity was successfully met by the 1.5-to-1 ratiometric threshold criteria method in 150/401 instances (37.4%) and by the three-sigma statistical threshold criteria method in 259/401 instances (64.6%) (P < 0.001). Likewise, the three-sigma statistical threshold criteria method detected true positive results at target-to-background ratios much lower than the 1.5-to-1 target-to-background ratio of the 1.5-to-1 ratiometric threshold criteria method. The three-sigma statistical threshold criteria method was significantly better than the 1.5-to-1 ratiometric threshold criteria method for determination of gamma detection probe positivity for intraoperative in situ detection of presumed abnormal (18)F-FDG-avid tissue sites during radioguided oncologic surgery. This finding may be extremely important for reshaping the ongoing and future research and development of gamma detection probe systems that are necessary for optimizing the in situ detection of radioisotopes of higher-energy gamma photon emissions used during radioguided oncologic surgery.

  15. Shaping asteroid models using genetic evolution (SAGE)

    Science.gov (United States)

    Bartczak, P.; Dudziński, G.

    2018-02-01

    In this work, we present SAGE (shaping asteroid models using genetic evolution), an asteroid modelling algorithm based solely on photometric lightcurve data. It produces non-convex shapes, orientations of the rotation axes and rotational periods of asteroids. The main concept behind a genetic evolution algorithm is to produce random populations of shapes and spin-axis orientations by mutating a seed shape and iterating the process until it converges to a stable global minimum. We tested SAGE on five artificial shapes. We also modelled asteroids 433 Eros and 9 Metis, since ground truth observations for them exist, allowing us to validate the models. We compared the derived shape of Eros with the NEAR Shoemaker model and that of Metis with adaptive optics and stellar occultation observations since other models from various inversion methods were available for Metis.

  16. Shape Modelling Using Maximum Autocorrelation Factors

    DEFF Research Database (Denmark)

    Larsen, Rasmus

    2001-01-01

    of Active Shape Models by Timothy Cootes and Christopher Taylor by building new information into the model. This new information consists of two types of prior knowledge. First, in many situation we will be given an ordering of the shapes of the training set. This situation occurs when the shapes....... Both these types of knowledge may be used to defined Shape Maximum Autocorrelation Factors. The resulting point distribution models are compared to ordinary principal components analysis using leave-one-out validation.......This paper addresses the problems of generating a low dimensional representation of the shape variation present in a training set after alignment using Procrustes analysis and projection into shape tangent space. We will extend the use of principal components analysis in the original formulation...

  17. The NLO unintegrated parton distribution functions (PDF) in the KMR and the MRW frameworks using the MSTW2008 PDF

    Science.gov (United States)

    Modarres, M.; Hosseinkhani, H.; Olanj, N.

    2013-03-01

    The next-to-leading order (NLO) unintegrated parton distribution functions (UPDF) are calculated in the two schemes by using the latest version of the integrated parton distribution functions (PDF) of Martin et al. (MSTW2008) as the inputs and the final results are compared among each others. In the first method, so-called the Kimber-Martin-Ryskin (KMR) prescription, the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) collinear approximation is used, instead of the Ciafaloni-Catani-Fiorani-Marchesini (CCFM) evolution equations and the dependence of PDF on the second scale, kt (the partons transverse momenta), beside the first scale, μ (μ is the probe scale), is included in the last step of DGLAP evolution equation. In the second approach, which has been proposed by Martin, Ryskin and Watt (MRW), the current scale, the splitting functions, etc are modified in the KMR procedure. The three-dimensional UPDF are presented in terms of different [x,kt2]-planes for the large values of x (the longitudinal fraction of parton momentum) at μ2=102 and 104 GeV. It is shown that as in MRW calculations, at each μ2 a kink is observed around kt2≃μ2 and kt2≃0.38μ2 for the KMR and the MRW formalisms, respectively. Finally, it is demonstrated that the MRW gluon UPDF decrease with respect to the KMR ones, except of the small kt2 regions, i.e. the Higgs production domain, so it can be concluded that the application of the MRW procedure may improve the exclusive reaction cross sections.

  18. Shape measurements of volcanic particles by CAMSIZER

    OpenAIRE

    Lo Castro, Maria Deborah; Andronico, Daniele; Nunnari, Giuseppe; Spata, Alessandro; Torrisi, Alessio

    2009-01-01

    The shape of volcanic particles is an important parameter holding information related to physical and geochemical processes. The study of particle shape may help improving knowledge on the main eruptive processes (fragmentation, transport and sedimentation) during explosive activity. In general, volcanic ash is formed by different components, namely juvenile, lithic and crystal particles, each one characterized by peculiar morphology. Moreover, quantifying the shape of pyroclasts is needed by...

  19. Post polymerization cure shape memory polymers

    Science.gov (United States)

    Wilson, Thomas S; Hearon, Michael Keith; Bearinger, Jane P

    2014-11-11

    This invention relates to chemical polymer compositions, methods of synthesis, and fabrication methods for devices regarding polymers capable of displaying shape memory behavior (SMPs) and which can first be polymerized to a linear or branched polymeric structure, having thermoplastic properties, subsequently processed into a device through processes typical of polymer melts, solutions, and dispersions and then crossed linked to a shape memory thermoset polymer retaining the processed shape.

  20. Bow-shaped toroidal field coils

    International Nuclear Information System (INIS)

    Bonanos, P.

    1981-05-01

    Design features of Bow-Shaped Toroidal Field Coils are described and compared with circular and D shaped coils. The results indicate that bow coils can produce higher field strengths, store more energy and be made demountable. The design offers the potential for the production of ultrahigh toroidal fields. Included are representative coil shapes and their engineering properties, a suggested structural design and an analysis of a specific case