WorldWideScience

Sample records for arch jacob disease

  1. Sarcomatous transformation of osteochondroma of the coronoid process forming pseudoarthrosis with zygomatic arch mistaken for Jacob disease.

    Science.gov (United States)

    Jha, Abhishek; Gupta, Prakhar; Khalid, Mohd; Naseem, Iqbal; Gupta, Gagan

    2014-01-01

    Osteochondromas are the most common benign osseous neoplasms, with a propensity to involve long bones. The involvement of the coronoid process is extremely rare, and osteochondromas of the coronoid process may form pseudoarticulations with the zygomatic arch when large, an entity that is extremely rare and termed as Jacob disease. Sarcomatous degeneration of osteochondroma of the coronoid process is an extremely rare entity and has not been described to date. Only 1 case of primary mesenchymal chondrosarcoma has been described. We present a case of a 24-year-old man with a chondrosarcoma of the coronoid process, who was wrongly diagnosed with Jacob disease on the basis of radiologic findings.

  2. Jacob's disease associated with temporomandibular joint dysfunction: a case report.

    Science.gov (United States)

    Capote, Ana; Rodríguez, Francisco J; Blasco, Ana; Muñoz, Mario F

    2005-01-01

    Jacob's disease is regarded a rare condition in which a joint formation is established between an enlarged mandibular coronoid process and the inner aspect of the zygomatic body. Chronic temporomandibular joint (TMJ) disk displacement has been proposed as etiological factor of coronoid process enlargement. We present a 23-year-old woman with long-standing TMJ dysfunction and restricted interincisal opening, who developed a progressive zygomatic asymmetry. The patient underwent treatment by intraoral coronoidectomy and homolateral TMJ arthroscopy in the same surgery. The histopathological diagnosis of the coronoid sample was cartilage-capped exostoses with presence of articular fibrous cartilage. Although the low prevalence of this entity, it should be considered as a possible diagnosis in patients with progressive limitation of mouth opening, although a TMJ syndrome may be present as a cause of this entity.

  3. Sporadic onset Creutzfeldt-Jacob disease: Interesting MRI observations

    Directory of Open Access Journals (Sweden)

    Praveen K

    2006-01-01

    Full Text Available We describe a 60-year-old woman with "probable" sporadic Creutzfeldt-Jacob disease (CJD who manifested with two months history of rapidly progressive dementia and abnormal behavior, speech and gait abnormality, excessive sleepiness and myoclonic jerks. Scalp EEG showed diffuse slowing of background activity to delta range and triphasic sharp wave complexes occurring periodically twice in one-second interval. Magnetic resonance Imaging (MRI of brain revealed high signal intensity on T2 weighted image (T2WI and fluid attenuated inversion recovery sequences in the caudate and putamen bilaterally. Diffusion weighted images showed bilateral symmetric hyperintense signals in the caudate and putamen. The role of MRI in the diagnosis of CJD is discussed.

  4. Jacob's limp.

    Science.gov (United States)

    Hoenig, L J

    1997-02-01

    This study describes in modern medical terms a traumatic hip injury suffered by the Biblical patriarch Jacob approximately 3,500 years ago. The case history is based on the original Hebrew text found in the Bible book of Genesis (Chapter 32:25-33) as interpreted by traditional Jewish commentaries on the Bible. Jacob sustained a hip injury in hand-to-hand combat with an adversary or through an intense physiological reaction to a prophetic vision of such a battle. He appears to have sustained neurological injury to his sciatic nerve as well as musculoskeletal damage to his hip. These injuries caused a temporary limping gait. Jacob probably sustained a neurapraxia of the sciatic nerve. The differential diagnosis of his musculoskeletal hip injury includes hip dislocation, fracture, soft tissue trauma, and articular pathology.

  5. Vene Jacob / Elvis Kollom

    Index Scriptorium Estoniae

    Kollom, Elvis

    2005-01-01

    Vene Jacob'i stiilist. Prantsuse mööblimeister Georges Jacob (1739-1814) kutsuti XVIII sajandi lõpukümnendil sisustama Peterburi aristokraatlikke interjööre. Jacob'i stiilis vene mööblist ja selle kättesaadavusest Eestis. Vene jacob hakkas lõpuks muutuma äravahetamiseni sarnaseks vene ampiiriga. 4 värv. ill

  6. A Review of Diseases of Aortic Arch: Diagnosis by CTA

    Directory of Open Access Journals (Sweden)

    S. Sabouri

    2007-05-01

    Full Text Available The noninvasive revolution in cardiovascular imaging has altered the diagnostic algorithm for all types of acquired and congenital cardiovascular disease. CT techniques are commonly used in the diagnosis of aortic arch and its major branch vessels as well as thoracic and abdominal aortic diseases. CT angiogra-phy combines with CT scans obtained detailed in-formation on precise morphology and extent of dis-ease. Studies were performed on an MDCT unit (4row GE light speed. In infants and small children, the seda-tion rate for CT was lower than that used for patients of similar age undergoing cardiac MR imaging. Seda-tion times ranged between 5 and 10 min, in the pedi-atric population, MDCT was performed with a 1- to 2.5-mm slice thickness in adults, MDCT was per-formed with a 2.5-mm slice thickness with 50% re-construction overlap, pitch 0.75-1.CT angiographic studies were performed with nonionic contrast mate-rial with iodine concentrations of 300 mg/mL admin-istered at a dose of 2-3 mL/kg. Contrast material was injected by power injection, followed by normal sa-line, an automated bolus-tracking technique was used at an injection rate of 2-4 mL/sec. the bolus-tracking device was placed on the ascending aorta. For pa-tients with thoracic outlet syndrome, CT angiogram was performed with neutral position of arm and ab-duction of the arm. Radiologist studied the CT image data in an axial cine paging mode as well as multiplanar reformations. To plan effective management of Aorta disease, CTA is displayed using a combination of 3D images, such as those obtained by multiplanar reformation (MPR, curved planar reformation (CPR, maximum intensity projection (MIP and volume rendering (VR. Case reports include coarctation of aorta, vascular ring, right sided aorta, interrupted aortic arch, abber-ant vessels, paitent ductus arteriosus, subclavian steel syndrome, aneurysm, dissection, thoracic outlet syn-drome, arthritis and atherosclerotic stenosis.

  7. Creutzfeldt-Jakob病和Alzheimer病的眼部改变%Ocular changes of Creutzfeldt Jacob and Alzheimer' s disease

    Institute of Scientific and Technical Information of China (English)

    赵静; 周琼

    2011-01-01

    Currently,the incidence of some degenerative diseases of central nervous system is higher and higher,however,the patients generally can't be early diagnosed to get treatment in time. Sometimes,visual symptoms appear in the earliest complaints of these patients, so more and more researchers realize the importance of the ocular changes to provide credible basis for earlier diagnosis of these diseases. This article reviews some new progress in visual symptoms,ocular morphological and pathological changes,and visual electrophysiological changes of Creutzfeldt Jacob disease and Alzheimer's disease.%当前,一些退行性中枢神经系统疾病的发病率越来越高,但却难以早期诊断以便及时进行有效的治疗.部分患者早期会出现视觉症状的变化,越来越多学者逐渐认识到研究退行性神经系统疾病眼部改变的重要性,以期能为这些疾病的早期诊断提供一些依据.本文就克雅病及阿尔兹海默病的视觉症状,眼部形态学、病理学改变及电生理改变的最新进展予以简要综述.

  8. Cardiogenic shock due to coronary artery disease associated with interrupted aortic arch

    Directory of Open Access Journals (Sweden)

    Luís Alberto Oliveira Dallan

    2013-06-01

    Full Text Available Acute pulmonary edema is a serious event. Its occurrence in association with interrupted aortic arch and coronary heart disease is rare. Recently, an old patient developed cardiogenic shock and acute pulmonary edema due to acute coronary insufficiency, associated with interrupted aortic arch. The coronary angiography revealed occlusion of the right coronary artery and 95% obstruction in the left main coronary artery, associated with interruption of the descending aorta. Coronary artery bypass graft was performed, without extracorporeal circulation, to the anterior descending coronary artery. We discuss the initial management, given the seriousness of the case.

  9. High arch

    Science.gov (United States)

    Pes cavus; High foot arch ... High foot arches are much less common than flat feet. They are more likely to be caused ... difficult to fit into shoes. People who have high arches most often need foot support. A high ...

  10. In Memoriam Dr. M. Jacobs

    NARCIS (Netherlands)

    Kalkman, C.

    1983-01-01

    Dr. Marius Jacobs, a senior staff member of the Rijksherbarium, died suddenly on 28 April 1983, following a heart attack some days earlier. He was only 53 years old and his death came as a great shock, not only to his colleagues at our institute. Jacobs was a many-sided man with interests in many fi

  11. MM2-Thalamic Creutzfeldt-Jacob Disease: Neuropathological, Biochemical and Transmission Studies Identify a Distinctive Prion Strain

    NARCIS (Netherlands)

    Moda, F.; Suardi, S.; Fede, Di G.; Indaco, A.; Limido, L.; Vimercati, C.; Ruggerone, M.; Campagnani, I.; Langeveld, J.P.M.; Terruzzi, A.; Brambilla, A.; Zerbi, P.; Fociani, P.; Bishop, T.; Will, G.W.; Manson, J.C.; Giaccone, G.; Tagliavini, F.

    2012-01-01

    In CreutzfeldtJakob disease (CJD), molecular typing based on the size of the protease resistant core of the disease-associated prion protein (PrPSc) and the M/V polymorphism at codon 129 of the PRNP gene correlates with the clinico-pathologic subtypes. Approximately 95% of the sporadic 129MM CJD pat

  12. Maurice Jacob 1933 - 2007

    CERN Multimedia

    2007-01-01

    CERN theorist Maurice Jacob passed away suddenly on May 2nd, following a heart attack. Throughout his research career, Maurice was a leader in the theory of high-energy hadron physics. In his early days, he made many key contributions, together with Giancarlo Wick, to the development of the helicity formalism that is being used increasingly in modern theoretical calculations. He was an expert on diffraction physics. Together with Sam Berman, he made the crucial observation that the appearance of point-like parton structures in deep-inelastic scattering implied the existence of high-transverse-momentum processes in proton-proton collisions, as subsequently observed at the CERN ISR. He was a pioneer of the studies of inclusive hadron-production processes, including scaling and its violations. Together with Ron Horgan, he made detailed predictions for the production of jets at the CERN proton-antiproton collider, which were subsequently discovered by the UA2 and UA1 experiments. Maurice worked closely with his...

  13. Jane Jacobs and creative cities

    NARCIS (Netherlands)

    Jacobs, Dany; Dalm, Roy van

    2012-01-01

    In February 2007, I published a short review of the biography Jane Jacobs: Urban Visionary, in the Dutch weekly Intermediair. It began as follows: “The Jacobses are a close-knit, productive family. The most famous at this moment is perhaps my cousin Marc, chief designer for Louis Vuitton. My uncles

  14. Johann Jacob Friedrich Wilhelm Parrot / Tõivo Sarmet

    Index Scriptorium Estoniae

    Sarmet, Tõivo

    2006-01-01

    Tartu Ülikooli rektorit Johann Jacob Friedrich Wilhelm Parrot loetakse Venemaa alpinismiajaloo alusepanijaks ja tema tähelepanuväärseimaks mägironimisalaseks teoks oli tõus Suur-Araratile 1829. aastal

  15. [Barba Jacob and the history of marihuana].

    Science.gov (United States)

    Rosselli, H

    1986-12-01

    The outstanding Latin-American poet Porfirio Barba-Jacob (1883-1942) was a heavy user of marihuana. In this paper the author provides some data concerning historical antecedents of marihuana--mainly in Latin America--and he discusses its influence upon Barba-Jacob's life and poetry. The hypothesis that consumption of marihuana is used by some hyperkinetic adults as self-induced pharmacotherapy is outlined.

  16. OBITUARY: Maurice Jacob (1933 2007)

    Science.gov (United States)

    Quercigh, Emanuele; Šándor, Ladislav

    2008-04-01

    Maurice Jacob passed away on 2 May 2007. With his death, we have lost one of the founding fathers of the ultra-relativistic heavy ion programme. His interest in high-energy nuclear physics started in 1981 when alpha alpha collisions could first be studied in the CERN ISR. An enthusiastic supporter of ion beam experiments at CERN, Maurice was at the origin of the 1982 Quark Matter meeting in Bielefeld [1] which brought together more than 100 participants from both sides of the Atlantic, showing a good enthusiastic constituency for such research. There were twice as many the following year at Brookhaven. Finally in the mid-eighties, a heavy ion programme was approved both at CERN and at Brookhaven involving as many nuclear as particle physicists. It was the start of a fruitful interdisciplinary collaboration which is nowadays continuing both at RHIC and at LHC. Maurice followed actively the development of this field, reporting at a number of conferences and meetings (Les Arcs, Bielefeld, Beijing, Brookhaven, Lenox, Singapore, Taormina,...). This activity culminated in 2000, when Maurice, together with Ulrich Heinz, summarized the main results of the CERN SPS heavy-ion experiments and the evidence was obtained for a new state of matter [2]. Maurice was a brilliant theoretical physicist. His many contributions have been summarized in a recent article in the CERN Courier by two leading CERN theorists, John Ellis and Andre Martin [3]. The following is an excerpt from their article: `He began his research career at Saclay and, while still a PhD student, he continued brilliantly during a stay at Brookhaven. It was there in 1959 that Maurice, together with Giancarlo Wick, developed the helicity amplitude formalism that is the basis of many modern theoretical calculations. Maurice obtained his PhD in 1961 and, after a stay at Caltech, returned to Saclay. A second American foray was to SLAC, where he and Sam Berman made the crucial observation that the point-like structures

  17. JACOB: an enterprise framework for computational chemistry.

    Science.gov (United States)

    Waller, Mark P; Dresselhaus, Thomas; Yang, Jack

    2013-06-15

    Here, we present just a collection of beans (JACOB): an integrated batch-based framework designed for the rapid development of computational chemistry applications. The framework expedites developer productivity by handling the generic infrastructure tier, and can be easily extended by user-specific scientific code. Paradigms from enterprise software engineering were rigorously applied to create a scalable, testable, secure, and robust framework. A centralized web application is used to configure and control the operation of the framework. The application-programming interface provides a set of generic tools for processing large-scale noninteractive jobs (e.g., systematic studies), or for coordinating systems integration (e.g., complex workflows). The code for the JACOB framework is open sourced and is available at: www.wallerlab.org/jacob.

  18. Ken Jacobs and the Perverted Archival Image

    Directory of Open Access Journals (Sweden)

    Gonçalo Pablo

    2016-12-01

    Full Text Available This paper analyses two recent works by American filmmaker Ken Jacobs that deal with aspects of remediation. The first is A Tom Tom Chaser, in which Jacobs records the telecine process that transforms the classic silent film Tom, Tom, the Piper’s Son from chemical into electronic media. The film is riddled with poetic turns inviting the audience to rediscover the medial noise hidden by images. Moreover, Jacobs focuses on the moment of transition from a material medium (the film strip to the immaterial (the image, the video, so that the noise brings the viewer closer to a perception or brief capture of the medium in itself. Images are both figured and disfigured along this process. The second work is The Guests, an unconventional 3D film in which Jacobs transforms a short take from a Lumière Brothers film by discovering unseen views of the original footage. In his remediation of the 3D technology, Jacobs employs the Pulfrich effect, which allows him to blur the images of the archival film and to create instances of uncertainty between the views coming from the two human eyes. As a result of this procedure, the characters in the film seem to look directly at the audience. The analysis of both films highlights the poetry of the typical manoeuvre by which Jacobs perverts the archival medium, whereupon the viewing mode between media denaturalizes the usual media gaze (framed and representational, focusing on the moment of viewing in itself. This, as a result, favours the medium for what it is and subverts the gaze that expects something representational, discursive, perhaps story-driven.

  19. Asymmetry of ARCH effects and natural resources disease or virtue: Mozambique experience

    Science.gov (United States)

    Faias, Marta; Mota, Pedro; Mulenga, Alberto; Pina, Joaquim P.

    2016-06-01

    We study the exchange rate behavior, mainly as to the presence of asymmetry in the shocks to conditional variance. Particularly, we investigate if the presence of that asymmetric response is specific to a marked behavior of the currency, appreciation/Dutch disease/depreciation, and if it appears masked when taking long non-homogeneous periods. Taking Mozambique Metical bilateral exchange rate against South Africa Rand, a major trading partner, we identify specific movements in defined sub-periods, where the most recent has the Dutch disease under scrutiny. Our results point out that asymmetry emerges especially when the currency is depreciating, while it is masked when considering larger periods that combine differences in currency behavior.

  20. Los poemas desconocidos de Barba-jacob

    Directory of Open Access Journals (Sweden)

    Helcías Martán Góngora

    1964-12-01

    Full Text Available La relectura y cotejo del octavo tomo de las meritísimas Ediciones Académicas, que Rafael Montoya consagró a la mayor gloria de Porfirio Barba Jacob, suscritan algunos interrogantes, que voy a tratar de resumir.

  1. Writing with Light: Jacob Riis's Ambivalent Exposures

    Science.gov (United States)

    Carter, Christopher

    2008-01-01

    The current interest in multimodal rhetoric was anticipated by Jacob Riis's social documentary texts and presentations during the late nineteenth and early twentieth centuries. In contrast with the socialist urban critiques presented by Friedrich Engels, Riis's work demonstrated profound ambivalence toward the city's poor. While calling for reform…

  2. Irène Jacob visits CERN

    CERN Multimedia

    CERN Bulletin

    2010-01-01

    French actress Irène Jacob, the daughter of physicist Maurice Jacob, visited the ATLAS and CMS control rooms on Monday 17 May together with Italian theatre actor-director Pippo Delbono, in search of inspiration for a short film. The film will be screened at the “nuit des particules” event accompanying this year’s ICHEP.   Pippo Delbono et Irène Jacob discussing their project. “La nuit des particules” (night of the particles) is an event open to the general public that is being organised for the evening of Tuesday, 27 July, to accompany the 35th International Conference on High Energy Physics (ICHEP). ICHEP is a major highlight in every physicist’s calendar, and this year’s edition is being held in Paris from 22 to 28 July. The short film will be screened during the evening, which will include a lecture and a show at the legendary Parisian cinema Le Grand Rex, with a colossal seating capacity of 2 700 spe...

  3. Jacob Max Rabbie (1927-2013).

    Science.gov (United States)

    Stroebe, Wolfgang; Zimbardo, Philip G

    2014-01-01

    Jacob Max Rabbie, an internationally renowned social psychologist and a founding member of the European Association of Social Psychology (EASP), died on June 29, 2013. Jaap was born in Haarlem, the Netherlands, on October 4, 1927. Jaap studied social psychology at the University of Amsterdam and became the face of Dutch social psychology. His later research focused on aggression between individuals and groups, his early work attempted to isolate the minimal conditions that suffice to generate discriminatory ingroup-outgroup attitudes. Jaap was a dedicated and passionate scientist, oriented to getting things right even when this meant going against the current stream.

  4. Dr Jacob van der Land, marine biologist extraordinary

    NARCIS (Netherlands)

    Bruggen, van A.C.

    2001-01-01

    This contribution is an attempt to sketch the life and works of Dr Jacob van der Land, curator of worms and chief marine biologist of the National Museum of Natural History, on the occasion of his official retirement. Born in 1935, Jacob van der Land read biology at Leiden University (1958-1964), wh

  5. JACOB: a dynamic database for computational chemistry benchmarking.

    Science.gov (United States)

    Yang, Jack; Waller, Mark P

    2012-12-21

    JACOB (just a collection of benchmarks) is a database that contains four diverse benchmark studies, which in-turn included 72 data sets, with a total of 122,356 individual results. The database is constructed upon a dynamic web framework that allows users to retrieve data from the database via predefined categories. Additional flexibility is made available via user-defined text-based queries. Requested sets of results are then automatically presented as bar graphs, with parameters of the graphs being controllable via the URL. JACOB is currently available at www.wallerlab.org/jacob.

  6. Intraoral gothic arch tracing.

    Science.gov (United States)

    Rubel, Barry; Hill, Edward E

    2011-01-01

    In order to create optimum esthetics, function and phonetics in complete denture fabrication, it is necessary to record accurate maxillo-mandibular determinants of occlusion. This requires clinical skill to establish an accurate, verifiable and reproducible vertical dimension of occlusion (VDO) and centric relation (CR). Correct vertical relation depends upon a consideration of several factors, including muscle tone, inter-dental arch space and parallelism of the ridges. Any errors made while taking maxillo-mandibular jaw relation records will result in dentures that are uncomfortable and, possibly, unwearable. The application of a tracing mechanism such as the Gothic arch tracer (a central bearing device) is a demonstrable method of determining centric relation. Intraoral Gothic arch tracers provide the advantage of capturing VDO and CR in an easy-to-use technique for practitioners. Intraoral tracing (Gothic arch tracing) is a preferred method of obtaining consistent positions of the mandible in motion (retrusive, protrusive and lateral) at a comfortable VDO.

  7. Reassessing Jacob Strauss and the Mosaic Code

    Directory of Open Access Journals (Sweden)

    Joel McDurmon

    2012-11-01

    Full Text Available This article reviewed claims made by modern scholars Ford Lewis Battles, G.H. Williams, and Theodore Tappert concerning the views of Jacob Strauss (1480–1530, court preacher at Eisenach, particularly in regard to the imposition of Mosaic Law upon the civil realm. Most pointedly, Battles claims Strauss proposed to replace European civil law completely with the ‘entire Mosaic code’. This study examined Strauss’s relevant writings to determine his position on Mosaic Law and civil law and demonstrated that the claims of Battles, Williams, and Tappert were not supported by the primary source evidence. Selections from Strauss’ 51 theses on usury are translated into English for the first time. To a much lesser degree, this study addressed the issue in regard to the Weimar court preacher Wolfgang Stein, against whom the same claims were made. A paucity of evidence rendered those claims dubious in his case. In the end we were left only with unsubstantiated second-hand claims against these men.

  8. Glossary to ARCH (GARCH)

    DEFF Research Database (Denmark)

    Bollerslev, Tim

    The literature on modeling and forecasting time-varying volatility is ripe with acronyms and abbreviations used to describe the many different parametric models that have been put forth since the original linear ARCH model introduced in the seminal Nobel Prize winning paper by Engle (1982......).  The present paper provides an easy-to-use encyclopedic reference guide to this long list of ARCH acronyms.  In addition to the acronyms associated with specific parametric models, I have also included descriptions of various abbreviations associated with more general statistical procedures and ideas...

  9. Right aortic arch with coarctation in Chinese children

    Energy Technology Data Exchange (ETDEWEB)

    Ming, Zhu; Aimin, Sun [Shanghai Children' s Medical Center, Department of Radiology, Shanghai (China)

    2008-05-15

    Because of the rarity of right aortic arch coarctation there are few reports of large groups of patients. To characterize the frequency and type of right aortic arch coarctation in a large group of pediatric patients. From June 1997 through May 2007, 11,276 consecutive children with congenital heart disease underwent multidetector CT (MDCT), MRI or angiocardiography examination. All children with a right aortic arch or coarctation were reviewed. Right aortic arch coarctation was found in 11 children representing 0.1% of the total group of 11,276 children, 1.7% of 658 children with native coarctations and 2.3% of 473 children with a right aortic arch. Among the 11 patients, 6 had long-segment narrowing and 7 had an aberrant left subclavian artery. MDCT, MRI and angiocardiography are reliable imaging techniques for the diagnosis of right aortic arch and coarctation. Our findings showed that the pattern of right aortic arch coarctation was different from that of left aortic arch coarctation, suggesting that they are different etiological entities. The pivotal role possibly played by flow dynamics in the development of right aortic arch coarctation is discussed. (orig.)

  10. [Peritoneal dialysis in a patient with right hemiparesis, lupus nephritis, significant insufficiency of arteries of aortic arch and celiac disease: case report].

    Science.gov (United States)

    Altabas, Karmela; Crne, Natasa; Franjić, Björn Dario; Pavlović, Drasko; Josipović, Josipa

    2012-10-01

    Peritoneal dialysis (PD) is a method of choice in patients in whom there are difficulties concerning creation of AV fistula. A 38-year old female patient came to our hospital because of a need of making an AV fistula. She had end-stage renal insufficiency of unknown origin. She had a right hemiparesis with a contracture of the right fist and epilepsy because of the stroke she suffered in 1993. After doing the diagnostics, we have found that patient had lupus nephritis, occlusion of brachiocephalic trunk, right and left common carotid artery and left subclavian artery. We also diagnosed celiac disease and a significant anemia. It was not possible to form an AV fistula, as it was not possible to do an assisted PD. Because of the right hemiparesis and contracture of the right fist, the possibility of performing PD independently was questionable. Despite the handicap, the patient had strong motivation and she managed to master the technique of PD independently. Even though it was estimated that she had a high risk score for applying anesthesia (ASA IV), the insertion of the peritoneal catheter went without complications. Because of the comorbidity, especially because of the significant stenosis and occlusions of the arteries of aortic arch, the kidney transplantation will not be performed. In the last fifteen months, the patient is performing PD independently, without any infectious complications, she is feeling well and is satisfied with the quality of her life. The consequences of the renal insufficiency are under control, systemic lupus erythematosus is, with a low dose of corticosteroids, in a steady state, malnutrition is corrected, but there is still hypoalbuminemia noted.

  11. Jacob L. Moreno and "Sociometry": A Mid-Century Reminiscence

    Science.gov (United States)

    Borgatta, Edgar F.

    2007-01-01

    In this article, the author describes how he first met Jacob L. Moreno, the founder of "Social Psychology Quarterly," through the intervention of Professor Wellman J. Warner, then the chairman of New York University's Department of Sociology. He then reminisces about his experience of working with Moreno on the journal "Sociometry."

  12. Jacob Lawrence's "The Migration Series": Art as Narrative History

    Science.gov (United States)

    Laney, James D.

    2007-01-01

    Because art is a reflection of cultural heritage, a natural affinity exists between art and social studies. In Jacob Lawrence's "The Migration Series," art serves as narrative history, with visual images telling the story of the Great Migration, a movement of African American people from the South to the North around World War I. Social studies…

  13. The ARCHES Project

    Science.gov (United States)

    Motch, C.; Arches Consortium

    2015-09-01

    The Astronomical Resource Cross-matching for High Energy Studies (ARCHES) project is a FP7-Space funded programme started in 2013 and involving the Observatoire Astronomique de Strasbourg including the CDS (France), the Leibniz- Institut für Astrophysik Potsdam (Germany), the University of Leicester (UK), the Universidad de Cantabria (IFCA, Spain) and the Instituto Nacional de Tecnica Aeroespacial (Spain). ARCHES will provide the international astronomical community with well-characterised multi-wavelength data in the form of spectral energy distributions (SEDs) for large samples of objects extracted from the 3XMM X-ray catalogue of serendipitous sources. The project develops new tools implementing fully probabilistic simultaneous cross-correlation of several catalogues and a multi-wavelength finder for clusters of galaxies. SEDs are based on an enhanced version of the 3XMM catalogue and on a careful selection of the most relevant multi-wavelength archival catalogues. In order to ensure the largest audience, SEDs will be distributed to the international community through CDS services and through the Virtual Observatory. These enhanced resources are tested in the framework of several science cases. More information may be found at http://www.arches-fp7.eu/

  14. The ARCHES project

    CERN Document Server

    Motch, C; Genova, F; Esteban, F Jiménez-; López, M; Michel, L; Mingo, B; Mints, A; Gómez-Morán, A Nebot; Pineau, F -X; Rosen, S; Sanchez, E; Schwope, A; Solano, E; Watson, M

    2016-01-01

    ARCHES (Astronomical Resource Cross-matching for High Energy Studies) is a FP7-Space funded project whose aim is to provide the international astronomical community with well-characterised multi-wavelength data in the form of spectral energy distributions (SEDs) for large samples of objects extracted from the 3XMM DR5 X-ray catalogue of serendipitous sources. The project has developed new tools implementing fully probabilistic simultaneous cross-correlation of several catalogues for unresolved sources and a multi-wavelength finder for clusters of galaxies for extended sources. These enhanced resources have been tested in the framework of several science cases.

  15. Double arch mirror study

    Science.gov (United States)

    Vukobratovich, D.; Hillman, D.

    1983-01-01

    The development of a method of mounting light weight glass mirrors for astronomical telescopes compatible with the goals of the Shuttle Infrared Telescope Facility (SIRTF) was investigated. A 20 in. diameter double arch lightweight mirror previously fabricated was modified to use a new mount configuration. This mount concept was developed and fabricated. The mounting concept of the double mounting mirror is outlined. The modifications made to the mirror, fabrication of the mirror mount, and room temperature testing of the mirror and mount and the extension of the mirror and mount concept to a full size (40 in. diameter) primary mirror for SIRTF are discussed.

  16. Jacob--the case of a serial killer.

    Science.gov (United States)

    Kallian, M; Bar-el, Y C; Durst, R; Witztum, E

    1996-01-01

    This paper describes a rare forensic psychiatric syndrome which has been the subject of massive publicity in the last decade. Despite the widespread interest, the psychodynamic process whereby a person becomes a serial murderer remains largely unknown. "Jacob" was convicted of a series of murders that he carried out over a decade. The case material is based on the psychiatric reports that were presented to the court and the many articles published in the local press at the time. Despite the limitations imposed by the material, the available information on "Jacob" bears some similarity to the phenomenological and psychodynamic models described in the literature. An attempt is made to understand the transformation of a person into a serial killer considering the life events, psychopathology and stressors that lead to the emergence from the world of imagination and fantasy of a potential murderer to the deeds that comprise the syndrome.

  17. Errant life, molecular biology, and biopower: Canguilhem, Jacob, and Foucault.

    Science.gov (United States)

    Talcott, Samuel

    2014-01-01

    This paper considers the theoretical circumstances that urged Michel Foucault to analyse modern societies in terms of biopower. Georges Canguilhem's account of the relations between science and the living forms an essential starting point for Foucault's own later explorations, though the challenges posed by the molecular revolution in biology and François Jacob's history of it allowed Foucault to extend and transform Canguilhem's philosophy of error. Using archival research into his 1955-1956 course on "Science and Error," I show that, for Canguilhem, it is inauthentic to treat a living being as an error, even if living things are capable of making errors in the domain of knowledge. The emergent molecular biology in the 1960s posed a grave challenge, however, since it suggested that individuals could indeed be errors of genetic reproduction. The paper discusses how Canguilhem and Foucault each responded to this by examining, among other texts, their respective reviews of Jacob's The Logic of the Living. For Canguilhem this was an opportunity to reaffirm the creativity of life in the living individual, which is not a thing to be evaluated, but the source of values. For Foucault, drawing on Jacob's work, this was the opportunity to develop a transformed account of valuation by posing biopower as the DNA of society. Despite their disagreements, the paper examines these three authors as different iterations of a historical epistemology attuned to errancy, error, and experimentation.

  18. Using ArchE in the Classroom: One Experience

    Science.gov (United States)

    2007-09-01

    displaying the new itinerary The team initially adopted the Model-View-Controller ( MVC ) architecture as the top-level architecture . The...CMU/SEI-2007-TN-001 Software Architecture Technology Initiative Unlimited distribution subject to the copyright. This report was prepared...SOFTWARE ENGINEERING INSTITUTE | v vi | CMU/SEI-2007-TN-001 Abstract The Architecture Expert (ArchE) tool serves as a software architecture

  19. Assessing corrections to the Fick-Jacobs equation

    Science.gov (United States)

    Dorfman, Kevin D.; Yariv, Ehud

    2014-07-01

    We utilize macrotransport theory to compute the effective diffusion coefficient of a point-sized particle in a periodic channel of slowly varying cross-section to the second order in the long-wavelength limit. This asymptotic result serves as a benchmark test for the respective modifications of the Fick-Jacobs equation proposed by Zwanzig [J. Phys. Chem. 96, 3926 (1992)], Reguera and Rubi [Phys. Rev. E 64, 061106 (2001)], and Kalinay and Percus [Phys. Rev. E 74, 041203 (2006)]. While all three modifications result in an identical effective diffusivity at first order, only the model proposed by Kalinay and Percus agrees at second order with our asymptotic result.

  20. Jacob Hemet. Dentist to royalty and entrepreneur extraordinaire.

    Science.gov (United States)

    Ring, Malvin E

    2006-11-01

    One of the most prominent dentists in late-18th century London was Jacob Hemet, member of a long family of dentists. He was appointed royal dentist to Queen Charlotte, wife of George the Third, and to George's favorite daughter, Amelia, and the Prince of Wales. He advertised widely, both in this country and in several European countries, including his native France. However, what makes him noteworthy is the fact that he was the very first person to patent a dentifrice and the first to use marketing techniques similar to those used by the foremost toothpaste manufacturers of today.

  1. Jacob Stael von Holstein ja palladionism eesti arhitektuuris / Ants Hein

    Index Scriptorium Estoniae

    Hein, Ants, 1952-

    2005-01-01

    Sõjaväeinsenerist ja arhitektist Jacob Stael von Holsteinist (1628, Pärnu-1679), tema kavandatud hoonetest ja rollist 17. sajandi II poole arhitektuuris. Fabian von Ferseni Toompeal Lossiplatsil asunud elamust (lammutati 1894) ja Maardu mõisahoonest, Hans von Ferseni Mäo mõisahoonest Järvamaal, Otto Wilhelm von Ferseni majast Toompeal, Axel von Roseni majast Tallinnas Pikk t. 28 (1670-74), Otto Reinhold von Taube majast Tartus (hävinud), J. S. von Holsteini enda hoonetest: majast Tallinnas Toompea 1, Anija mõisahoonest, elamust Riias jm. Bibliograafia lk. 452

  2. Recurrent Pneumonia due to Double Aortic Arch

    Directory of Open Access Journals (Sweden)

    I. Sedighi

    2012-04-01

    Full Text Available Introduction: Pneumonia is one of the most common infections during childhood. In children with recurrent bacterial pneumonia complete evaluation for underlying factors is necessary. The most common underlying diseases include: antibody deficiencies , cystic fibrosis , tracheoesophageal fistula and increased pulmonary blood flow. Vascular ring and its pressure effect is a less common cause of stridor and recurrent pneumonia. Congenital abnormalities in aortic arch and main branches which form vascular ring around esophagus and trachea with variable pressure effect cause respiratory symptoms such as stridor , wheezing and recurrent pneumoniaCase Report: A 2 year old boy was admitted in our hospital with respiratory distress and cough . Chest x-Ray demonstrated right lobar pneumonia. He had history of stridor and wheezing from neonatal period and hospitalization due to pneumonia for four times. The patient received appropriate antibiotics. Despite fever and respiratory distress improvement, wheezing continued. Review of his medical documents showed fixed pressure effect on posterior aspect of esophagus in barium swallow. In CT angiography we confirmed double aortic arch.Conclusion: Double aortic arch is one of the causes of persistant respiratory symptom and recurrent pneumonia in children for which fluoroscopic barium swallow is the first non-invasive diagnostic method.(Sci J Hamadan Univ Med Sci 2012;19(1:70-74

  3. Jane Jacobs' ideas about the economical nature of urban societies

    Directory of Open Access Journals (Sweden)

    Pušić Ljubinko

    2011-01-01

    Full Text Available It is not possible at all to understand the ideas that Jane Jacobs had been asserting in her various academic, activistic and research works if we consider only one of these aspects. If we consider, as the very center of her interest for urban societies, only her ideas about large American cities, we put in second plan, to some extent, her ideas covering a much wider spectrum. Particularly, I am referring to her understanding of the relationships between economy, cities and prosperity of nations. Today, after almost thirty years since the publication of “Cities and the Wealth of Nations”, it is easy to notice her ability of anticipation: we analyze ideas about the connections between the roles of national states, globalization and the existence of world cities. When the problem is about the destiny of big cities and their connections to the economy, J. Jacobs assembles the scenario of the historical retrospective and vision, in a similar way to L. Mumford. With a careful reading of her ideas, we become conscious of the extent to which the connecting of urban features allows sociology to understand, to accept many disciplines in contact and use them as complementary. It is not only a cheap, postmodern flirting with the main stream in the center of which lies globalization, but more an opening of humanities to the ideas of I. Wallerstein of a heuristic importance.

  4. Congenital aortic arch anomalies: diagnosis using contrast enhanced magnetic resonance angiography

    Institute of Scientific and Technical Information of China (English)

    ZHU Ming; ZHONG Yu-min; LI Yu-hua; SUN Ai-min; JIN Biao

    2005-01-01

    @@ Congenital aortic arch anomalies occur most commonly in children. The disease can be classified into three types: ① obstructive congenital abnormalities, including coarctation of aorta (CoA) and interruption of aortic arch (IAA); ② non-obstructive congenital abnormalities, including double aortic arch and others; ③ congenital shunt abnormalities, including different types of patent ductus arteriosus (PDA). Management of patients with congenital aortic arch anomalies relies on imaging. Routine imaging modalities, such as conventional X-ray plain film and transthoracic echocardiography (TTE), have been recently complemented by magnetic resonance imaging (MRI).

  5. Blood flow characteristics in the aortic arch

    Science.gov (United States)

    Prahl Wittberg, Lisa; van Wyk, Stevin; Mihaiescu, Mihai; Fuchs, Laszlo; Gutmark, Ephraim; Backeljauw, Philippe; Gutmark-Little, Iris

    2012-11-01

    The purpose with this study is to investigate the flow characteristics of blood in the aortic arch. Cardiovascular diseases are associated with specific locations in the arterial tree. Considering atherogenesis, it is claimed that the Wall Shear Stress (WSS) along with its temporal and spatial gradients play an important role in the development of the disease. The WSS is determined by the local flow characteristics, that in turn depends on the geometry as well as the rheological properties of blood. In this numerical work, the time dependent fluid flow during the entire cardiac cycle is fully resolved. The Quemada model is applied to account for the non-Newtonian properties of blood, an empirical model valid for different Red Blood Cell loading. Data obtained through Cardiac Magnetic Resonance Imaging have been used in order to reconstruct geometries of the the aortic arch. Here, three different geometries are studied out of which two display malformations that can be found in patients having the genetic disorder Turner's syndrome. The simulations show a highly complex flow with regions of secondary flow that is enhanced for the diseased aortas. The financial support from the Swedish Research Council (VR) and the Sweden-America Foundation is gratefully acknowledged.

  6. Remote Laboratory Java Server Based on JACOB Project

    Directory of Open Access Journals (Sweden)

    Pavol Bisták

    2011-02-01

    Full Text Available Remote laboratories play an important role in the educational process of engineers. This paper deals with the structure of remote laboratories. The principle of the proposed remote laboratory structure is based on the Java server application that communicates with Matlab through the COM technology for the data exchange under the Windows operating system. Java does not support COM directly so the results of the JACOB project are used and modified to cope with this problem. In laboratories for control engineering education a control algorithm usually runs on a PC with Matlab that really controls the real plant. This is the server side described in the paper in details. To demonstrate the possibilities of a remote control a Java client server application is also introduced. It covers communication and offers a user friendly interface for the control of a remote plant and visualization of measured data.

  7. Theory of Arched Structures Strength, Stability, Vibration

    CERN Document Server

    Karnovsky, Igor A

    2012-01-01

    Theory of Arched Structures: Strength, Stability, Vibration presents detailed procedures for analytical analysis of the strength, stability, and vibration of arched structures of different types, using exact analytical methods of classical structural analysis. The material discussed is divided into four parts. Part I covers stress and strain with a particular emphasis on analysis; Part II discusses stability and gives an in-depth analysis of elastic stability of arches and the role that matrix methods play in the stability of the arches; Part III presents a comprehensive tutorial on dynamics and free vibration of arches, and forced vibration of arches; and Part IV offers a section on special topics which contains a unique discussion of plastic analysis of arches and the optimal design of arches.

  8. Contrast-enhanced magnetic resonance angiography of persistent fifth aortic arch in children

    Energy Technology Data Exchange (ETDEWEB)

    Zhong, Yumin; Zhu, Ming; Sun, Aimin; Li, Yuhua [Shanghai Jiao Tong University School of Medicine, Department of Radiology, Shanghai Children' s Medical Center, Shanghai (China); Jaffe, Richard B. [Primary Children' s Medical Center, Department of Medical Imaging, Salt Lake City, UT (United States); Gao, Wei [Shanghai Jiao Tong University School of Medicine, Department of Cardiology, Shanghai Children' s Medical Center, Shanghai (China)

    2007-03-15

    Cine angiography and echocardiography have been utilized to diagnose congenital aortic arch anomalies. However, the visualization of great vessels by echocardiography is limited, while cine angiography requires cardiac catheterization with ionizing radiation. Contrast-enhanced magnetic resonance angiography (MRA) is a noninvasive modality suitable for visualization of congenital aortic arch anomalies. To evaluate the utility of contrast-enhanced MRA in the diagnosis of persistent fifth aortic arch, a rare congenital aortic arch anomaly, and to compare the diagnostic accuracy of MRA with that of echocardiography and cine angiography. In four pediatric patients, contrast-enhanced MRA studies were performed for diagnosing persistent fifth aortic arch. The findings of MRA were compared with echocardiographic findings and confirmed by cine angiography and operation. Transthoracic surface echocardiography noted an aberrant vessel arising from the ascending aorta in two of four patients; the etiology of this vessel was uncertain. In the other two patients a diagnosis of coarctation was made. Of the four patients, only one was diagnosed with interruption of the aortic arch. Contrast-enhanced MRA clarified uncertain echocardiographic findings, enabling the correct diagnosis of persistent fifth aortic arch with fourth aortic arch interruption in all four patients. Contrast-enhanced MRA is a safe, accurate, and fast imaging technique for the evaluation of persistent fifth aortic arch and may obviate the need for conventional cine angiography. Cardiac catheterization may be reserved for some types of complicated congenital heart disease and for obtaining hemodynamic information. (orig.)

  9. Arch bridges – unlocking their potential

    OpenAIRE

    Long, Adrian; Nanukuttan, Sreejith

    2016-01-01

    Arch bridges are strong, durable, aesthetically pleasing and require little maintenance but very few have been built since the early 1900s. However, this trend has changed as more than 60 FlexiArch bridges have been installed since the system was launched in 2007. The FlexiArch uses precast concrete voussoirs, requires neither corrodible reinforcement, nor centring, can be installed in hours and is contractor friendly. Details of this innovative method of construction and installation of arch...

  10. Taani viib õpilaste testimise Internetti / Jacob Wandall ; intervjueerinud Raivo Juurak ; kommenteerinud Anti Teepere

    Index Scriptorium Estoniae

    Wandall, Jacob

    2009-01-01

    Ülevaade adaptiivtestidest ja nende rakendamise kavadest Taani põhikoolis. Vestlus Taani haridusministeeriumi koolivalitsuse peaspetsialist Jacob Wandalliga, kommenteerib REKK-i üldhariduse õppekavade ja eksamite osakonna peaspetsialist Anti Teepere

  11. Jacobs Engineering Group Inc. receives architectural and engineering design contract from Stanford Linear Accelerator Centre

    CERN Multimedia

    2004-01-01

    "Jacobs Engineering Group Inc. announced that a subsidiary company won a contract from Stanford Linear Accelerator Center (SLAC), to provide architectural and engineering design services for the Linac Coherent Light Source (LCLS) conventional facilities" (1/2 page)

  12. Caldendrin-Jacob: a protein liaison that couples NMDA receptor signalling to the nucleus.

    Directory of Open Access Journals (Sweden)

    Daniela C Dieterich

    2008-02-01

    Full Text Available NMDA (N-methyl-D-aspartate receptors and calcium can exert multiple and very divergent effects within neuronal cells, thereby impacting opposing occurrences such as synaptic plasticity and neuronal degeneration. The neuronal Ca2+ sensor Caldendrin is a postsynaptic density component with high similarity to calmodulin. Jacob, a recently identified Caldendrin binding partner, is a novel protein abundantly expressed in limbic brain and cerebral cortex. Strictly depending upon activation of NMDA-type glutamate receptors, Jacob is recruited to neuronal nuclei, resulting in a rapid stripping of synaptic contacts and in a drastically altered morphology of the dendritic tree. Jacob's nuclear trafficking from distal dendrites crucially requires the classical Importin pathway. Caldendrin binds to Jacob's nuclear localization signal in a Ca2+-dependent manner, thereby controlling Jacob's extranuclear localization by competing with the binding of Importin-alpha to Jacob's nuclear localization signal. This competition requires sustained synapto-dendritic Ca2+ levels, which presumably cannot be achieved by activation of extrasynaptic NMDA receptors, but are confined to Ca2+ microdomains such as postsynaptic spines. Extrasynaptic NMDA receptors, as opposed to their synaptic counterparts, trigger the cAMP response element-binding protein (CREB shut-off pathway, and cell death. We found that nuclear knockdown of Jacob prevents CREB shut-off after extrasynaptic NMDA receptor activation, whereas its nuclear overexpression induces CREB shut-off without NMDA receptor stimulation. Importantly, nuclear knockdown of Jacob attenuates NMDA-induced loss of synaptic contacts, and neuronal degeneration. This defines a novel mechanism of synapse-to-nucleus communication via a synaptic Ca2+-sensor protein, which links the activity of NMDA receptors to nuclear signalling events involved in modelling synapto-dendritic input and NMDA receptor-induced cellular degeneration.

  13. Comparison between different plantar arch

    OpenAIRE

    2009-01-01

    The longitudinal plantar arch (LPA) perform biomechanics functions in the foot. The aim of this study was to compare the relationship between different index to measure the LPA of the foot. The arc index, Staheli index, Viladot classification and Feiss line were compared. In the transversal study, the experimental samples were soccer players females with age between 13 to 19 years. The measure were performed by plantigraphy, with out Feiss line. Although non significant the higher agreement w...

  14. The Arches Cluster Mass Function

    CERN Document Server

    Kim, S S; Kudritzki, R P; Najarro, F; Kim, Sungsoo S.; Figer, Donald F.; Kudritzki, Rolf P.

    2006-01-01

    We have analyzed H and K_s-band images of the Arches cluster obtained using the NIRC2 instrument on Keck with the laser guide star adaptive optics (LGS AO) system. With the help of the LGS AO system, we were able to obtain the deepest ever photometry for this cluster and its neighborhood, and derive the background-subtracted present-day mass function (PDMF) down to 1.3 Msun for the 5 arcsec-9 arcsec annulus of the cluster. We find that the previously reported turnover at 6 Msun is simply due to a local bump in the mass function (MF), and that the MF continues to increase down to our 50 % completeness limit (1.3 Msun) with a power-law exponent of Gamma = -0.91 for the mass range of 1.3 < M/Msun < 50. Our numerical calculations for the evolution of the Arches cluster show that the Gamma values for our annulus increase by 0.1-0.2 during the lifetime of the cluster, and thus suggest that the Arches cluster initially had Gamma of -1.0 ~ -1.1, which is only slightly shallower than the Salpeter value.

  15. Selective cerebro-myocardial perfusion in complex congenital aortic arch pathology: a novel technique.

    Science.gov (United States)

    De Rita, Fabrizio; Lucchese, Gianluca; Barozzi, Luca; Menon, Tiziano; Faggian, Giuseppe; Mazzucco, Alessandro; Luciani, Giovanni Battista

    2011-11-01

    Simultaneous cerebro-myocardial perfusion has been described in neonatal and infant arch surgery, suggesting a reduction in cardiac morbidity. Here reported is a novel technique for selective cerebral perfusion combined with controlled and independent myocardial perfusion during surgery for complex or recurrent aortic arch lesions. From April 2008 to April 2011, 10 patients with arch pathology underwent surgery (two hypoplastic left heart syndrome [HLHS], four recurrent arch obstruction, two aortic arch hypoplasia + ventricular septal defect [VSD], one single ventricle + transposition of the great arteries + arch hypoplasia, one interrupted aortic arch type B + VSD). Median age was 63 days (6 days-36 years) and median weight 4.0 kg (1.6-52). Via midline sternotomy, an arterial cannula (6 or 8 Fr for infants) was directly inserted into the innominate artery or through a polytetrafluoroethylene (PTFE) graft (for neonates cerebro-myocardial perfusion was 39 ± 18 min (17-69). Weaning from cardiopulmonary bypass was achieved without inotropic support in three and with low dose in seven patients. One patient required veno-arterial extracorporeal membrane oxygenation. Four patients, body weight cerebro-myocardial perfusion is feasible in patients with complex or recurrent aortic arch disease, starting from premature newborn less than 2.0 kg of body weight to adults. The technique is as safe as previously reported methods of cerebro-myocardial perfusion and possibly more versatile.

  16. Revisiting impressions using dual-arch trays.

    Science.gov (United States)

    Small, Bruce W

    2012-01-01

    Making routine perfect impressions is the goal of any restorative dentist. Using dual-arch trays is an easy, repeatable way to accomplish that goal, as long as each step is done before the next and each step is performed perfectly. This column reviewed several articles that support the metal dual-arch concept and provided some clinical tips that might help restorative dentists. The dual-arch technique does have its limits and is meant for one or two teeth in a quadrant when there are other teeth to occlude with. Also, if the case involves anterior guidance, a full-arch impression maybe advisable.

  17. Abnormal aortic arch morphology in Turner syndrome patients is a risk factor for hypertension.

    Science.gov (United States)

    De Groote, Katya; Devos, Daniël; Van Herck, Koen; Demulier, Laurent; Buysse, Wesley; De Schepper, Jean; De Wolf, Daniël

    2015-09-01

    Hypertension in Turner syndrome (TS) is a multifactorial, highly prevalent and significant problem that warrants timely diagnosis and rigorous treatment. The objective of this study was to investigate the association between abnormal aortic arch morphology and hypertension in adult TS patients. This was a single centre retrospective study in 74 adult TS patients (age 29.41 ± 8.91 years) who underwent a routine cardiac MRI. Patients were assigned to the hypertensive group (N = 31) if blood pressure exceeded 140/90 mmHg and/or if they were treated with antihypertensive medication. Aortic arch morphology was evaluated on MRI images and initially assigned as normal (N = 54) or abnormal (N = 20), based on the curve of the transverse arch and the distance between the left common carotid-left subclavian artery. We additionally used a new more objective method to describe aortic arch abnormality in TS by determination of the relative position of the highest point of the transverse arch (AoHP). Logistic regression analysis showed that hypertension is significantly and independently associated with age, BMI and abnormal arch morphology, with a larger effect size for the new AoHP method than for the classical method. TS patients with hypertension and abnormal arch morphology more often had dilatation of the ascending aorta. There is a significant association between abnormal arch morphology and hypertension in TS patients, independent of age and BMI, and not related to other structural heart disease. We suggest that aortic arch morphology should be included in the risk stratification for hypertension in TS and propose a new quantitative method to express aortic arch morphology.

  18. Tympanic ossicles and pharyngeal arches.

    Science.gov (United States)

    Whyte, J; Cisneros, A; Yus, C; Fraile, J; Obón, J; Vera, A

    2009-02-01

    We have performed a study on 11 human embryos regarding the development of the tympanic ossicles and their relationship with the first pharyngeal arch. After performing measurements to date the embryos and foetuses chronologically, we performed a meticulous dissection of the temporal bones. Subsequently, they were fixed in 10% formol, decalcified with 2% nitric acid, embedded in Paraplast, sectioned in 7-mm sequences and stained with Martin's trichrome technique. In the 21- and 24-mm cranium-raquis (CR) length human embryos, we have observed the head of the malleus and the body of the incus close to Meckel's cartilage, in addition to the handle of the malleus, the long limb of the incus and the stapes. Between them there was a mesenchymal band inside the primordium of the tympanic cavity. In the 27-mm CR embryo, the various components of the malleus and incus were fusing, and in the 30-mm CR embryo the union was complete. From our observations, we can conclude that the malleus and the incus are derived from the first and second pharyngeal arches.

  19. Occlusal stability in shortened dental arches.

    Science.gov (United States)

    Witter, D J; Creugers, N H; Kreulen, C M; de Haan, A F

    2001-02-01

    Shortened dental arches consisting of anterior and premolar teeth have been shown to meet oral functional demands. However, the occlusal stability may be at risk as a result of tooth migration. The aim of this nine-year study was to investigate occlusal stability in shortened dental arches as a function over time. Occlusal stability indicators were: 'interdental spacing', 'occlusal contacts of anterior teeth in Intercuspal Position', 'overbite', 'occlusal tooth wear', and 'alveolar bone support'. Subjects with shortened dental arches (n = 74) were compared with subjects with complete dental arches (controls, n = 72). Repeated-measurement regression analyses were applied to assess age-dependent variables in the controls and to relate the occlusal changes to the period of time since the treatment that led to the shortened dental arches. Compared with complete dental arches, shortened dental arches had similar overbite and occlusal tooth wear. They showed more interdental spacing in the premolar regions, more anterior teeth in occlusal contact, and lower alveolar bone scores. Since the differences remained constant over time, we conclude that shortened dental arches can provide long-term occlusal stability. Occlusal changes were self-limiting, indicating a new occlusal equilibrium.

  20. Outcomes of single-stage total arch replacement via clamshell incision

    Directory of Open Access Journals (Sweden)

    Ishizaka Toru

    2011-09-01

    Full Text Available Abstract Background Treatment of complex aortic pathologies involving the transverse arch with extensive involvement of the descending aorta remains a surgical challenge. Since clamshell incision provides superior exposure of the entire thoracic aorta, we evaluated the use of this technique for single-stage total arch replacement by arch vessel reconstruction. Methods The arch-first technique combined with clamshell incision was used in 38 cases of aneurysm and aortic disease in 2008 and 2009. Extensive total arch replacement was used with clamshell incision for reconstruction of arch vessels under deep hypothermic circulatory arrest. Results Overall 30-day mortality was 13%. The mean operating time was approximately 8 hours. Deep hypothermia resulted in mean CPB time exceeding 4.5 hours and mean duration of circulatory arrest was 25 minutes. The overall postoperative temporary and permanent neurologic dysfunction rates were 3% and 3% for elective and 3% and 0% for emergency surgery, respectively. All patients except the five who died in hospital were discharged without nursing care after an average post-operative hospital stay of 35 days. Conclusions The arch-first technique, combined with clamshell incision, provides expeditious replacement of the thoracic aorta with an acceptable duration of hypothermic circulatory arrest and minimizes the risk of retrograde atheroembolism by using antegrade perfusion.

  1. Neuroscienze controverse: il caso dei neuroni specchio; BrainFactor intervista Pierre Jacob

    Directory of Open Access Journals (Sweden)

    Andrea Lavazza

    2012-07-01

    Full Text Available Pierre Jacob, filosofo della mente e scienziato cognitivo, è attualmente presidente della Società europea di filosofia e psicologia e direttore dell’Istituto Jean Nicod di Parigi, importante centro di ricerca sulla mente e il cervello. Ha scritto, tra l’altro, "What minds can do" (Cambridge University Press, nel quale indaga il problema di una spiegazione naturalistica dei contenuti delle rappresentazioni mentali e quello dell’efficacia dei contenuti mentali nella spiegazione causale del comportamento individuale.[...] Professor Jacob, come valuta lo studio di Caramazza sui neuroni specchio?

  2. John Ellis : "Growing physics at CERN"; symposium in honour of Maurice Jacob on 27th March 1998

    CERN Multimedia

    Patrice Loïez

    1998-01-01

    On the occasion of the 65th birthday of Maurice Jacob, his friends are organizing, together with CERN, a symposium presenting some of the scientific fields to which Maurice Jacob has made decisive contributions during his career or in which he has a

  3. Persistent fifth arch anomalies - broadening the spectrum to include a variation of double aortic arch vascular ring

    Energy Technology Data Exchange (ETDEWEB)

    Newman, Beverley; Chan, Frandics [Stanford Children' s Hospital and Stanford University, Department of Radiology, Stanford, CA (United States); Hanneman, Kate [University of Toronto, Department of Medical Imaging, Toronto, ON (Canada)

    2016-12-15

    Fifth arch anomalies are rare and complex and frequently misdiagnosed or mistaken for other entities. We report a double arch vascular ring that is thought to consist of right fourth arch and left fifth arch components, a previously undescribed persistent fifth arch variant. The currently recognized spectrum and classification of fifth arch vascular anomalies are expanded along with illustrative images to justify the proposed changes. Reviewing and expanding the classification of fifth arch anomalies to include a double arch ring variant will promote recognition, correct diagnosis and appropriate management of these anomalies. (orig.)

  4. Nonlinear Dynamics of Electrostatically Actuated MEMS Arches

    KAUST Repository

    Al Hennawi, Qais M.

    2015-05-01

    In this thesis, we present theoretical and experimental investigation into the nonlinear statics and dynamics of clamped-clamped in-plane MEMS arches when excited by an electrostatic force. Theoretically, we first solve the equation of motion using a multi- mode Galarkin Reduced Order Model (ROM). We investigate the static response of the arch experimentally where we show several jumps due to the snap-through instability. Experimentally, a case study of in-plane silicon micromachined arch is studied and its mechanical behavior is measured using optical techniques. We develop an algorithm to extract various parameters that are needed to model the arch, such as the induced axial force, the modulus of elasticity, and the initially induced initial rise. After that, we excite the arch by a DC electrostatic force superimposed to an AC harmonic load. A softening spring behavior is observed when the excitation is close to the first resonance frequency due to the quadratic nonlinearity coming from the arch geometry and the electrostatic force. Also, a hardening spring behavior is observed when the excitation is close to the third (second symmetric) resonance frequency due to the cubic nonlinearity coming from mid-plane stretching. Then, we excite the arch by an electric load of two AC frequency components, where we report a combination resonance of the summed type. Agreement is reported among the theoretical and experimental work.

  5. In-Plane Elastic Buckling of Arch

    Institute of Scientific and Technical Information of China (English)

    剧锦三; 郭彦林

    2002-01-01

    The in-plane elastic buckling behavior of arches is investigated using a new finite-element approach for the nonlinear analysis. The linear buckling, nonlinear primary buckling, and secondary bifurcation buckling behavior of arches are compared taking into account the large deformation and the effects of initial geometric imperfections or perturbations. The theoretical investigation emphasizes the nonlinear secondary bifurcation buckling behavior for a full span uniformly distributed load. The efficiency of compact method for tracing secondary buckling path is shown through several examples. Finally, a new structural design, which prevents the secondary bifurcation buckling by adding some crossed cables across the arch, is proposed to improve the limit load carrying capacity.

  6. Mycotic Aneurysm of the Aortic Arch

    Directory of Open Access Journals (Sweden)

    Ji Hye Seo

    2014-08-01

    Full Text Available A mycotic aneurysm of the thoracic aorta is rare. We report a case of mycotic aneurysm that developed in the aortic arch. An 86-year-old man was admitted with fever and general weakness. Blood culture yielded methicillin-resistant Staphylococcus aureus. Chest X-ray showed an enlarged aortic arch, and computed tomography scan revealed an aneurysm in the aortic arch. The patient was treated only with antibiotics and not surgically. The size of the aneurysm increased rapidly, resulting in bronchial obstruction and superimposed pneumonia. The patient died of respiratory failure.

  7. Lieve Dr. Jacobs. Brieven uit de Wereldbond voor Vrouwenkiesrecht, 1902-1942

    NARCIS (Netherlands)

    Bosch, Mineke; Kloosterman, Annemarie

    1985-01-01

    In 1904 werd te Berlijn de Wereldbond voor vrouwenkiesrecht opgericht. Door middel van een selectie uit de brieven van toonaangevende vrouwen t.w. Aletta Jacobs, Rosa Manus, Carrie Chapman Catt, Anna Howard Shaw en Rosik Schwimmer, worden het ontstaan, de achtergronden en de geschiedenis van deze in

  8. Heldendom in herinnering: mythologie en geschiedenis in Jacob Duyms Nassausche Perseus

    NARCIS (Netherlands)

    Jansen, J.

    2014-01-01

    In Nassausche Perseus (1606) Jacob Duym uses the Ovidian myth of Perseus to illustrate historical progress in the period between the arrival and departure (1567-1573) of the Duke of Alba in and from the Netherlands. The text interferes between two worlds, as the play tells the story of the myth and

  9. Eerst de waarheid, dan de vrede. Jacob Revius 1586-1658

    NARCIS (Netherlands)

    de Bruijn, H.A.

    2012-01-01

    This biography concentrates on the life, poetry and world view of the Dutch poet and theologian Jacob Revius (1586-1658). Revius was one of the most prominent Reformed opinion leaders in the seventeenth-century Dutch Republic, who lived through a period of revolutionary changes in science, religion

  10. Audru Püha Risti kirik / Jürgen Grablings, Jacob Greisson, Matthias Woywoden...[jt.

    Index Scriptorium Estoniae

    2007-01-01

    välisvaade, altar; kivikirik pühitseti 1680 (ehitusmeistrid Jürgen Grablings, Jacob Greisson, Matthias Woywoden), torn valmis pärast 1695. aastat; neogooti stiilis tornikiiver ja sisustus XIX sajandil; altarimaal "Kristus ristil" (Gustav Biermann, 1872)

  11. Barba Jacob en portugués, ¿un nuevo heteronimo de Pessoa?

    Directory of Open Access Journals (Sweden)

    Elkin Restrepo

    2013-09-01

    Full Text Available Todos los sueños del mundo. Poemas de Fernando Pessoa y Porfirio Barba Jacob. Edición bilingüe / edição bilingüe. Jerónimo Pizarro (Prólogo y notas. Tragaluz Editores, Medellín, 2012, 303 págs., il.

  12. A Marriage of Minds: James R. Jacobs & Shinjoung Yeo Univ. of California-San Diego

    Science.gov (United States)

    Library Journal, 2005

    2005-01-01

    Their personalities and backgrounds are very different, but James R. Jacobs and Shinjoung Yeo are passionate about the same causes: librarianship, open government, and empowerment through information. They balance each other. Yeo is focused, realistic, critical, and an excellent researcher. Her superhero alter ego is Wet Blanket Woman, able to…

  13. Barba Jacob en portugués, ¿un nuevo heteronimo de Pessoa?

    OpenAIRE

    2013-01-01

    Todos los sueños del mundo. Poemas de Fernando Pessoa y Porfirio Barba Jacob. Edición bilingüe / edição bilingüe. Jerónimo Pizarro (Prólogo y notas). Tragaluz Editores, Medellín, 2012, 303 págs., il.

  14. The Birth and Development of Sociometry: The Work and Legacy of Jacob Moreno (1889-1974)

    Science.gov (United States)

    Marineau, Rene F.

    2007-01-01

    This article profiles Jacob Levy Moreno, the founder of this journal. He was born in 1889 in Romania, but moved to Vienna with his parents when he was four years of age. By all accounts, Moreno as a child was brilliant, spontaneous, creative and, presaging his later successes, was fascinated by relationships, first with his brothers and sisters,…

  15. Symposium at CERN in honour of Maurice Jacob on 27th March 1998

    CERN Multimedia

    Patrice Loïez

    1998-01-01

    The Jacobfest at CERN was prefaced by a talk by Maurice Jacob's longtime colleague Claude Cohen-Tannoudji of the College de France and Ecole Normale Superieure, who shared the 1997 Nobel Prize with Steven Chu of Stanford and William D. Phillips, of the US National Institute of Standards and Technology, for their development of methods to cool and trap atoms with laser light.

  16. That is where God comes in: Jacob Duym's Ghedenck-boeck as argumentative discourse

    NARCIS (Netherlands)

    Jansen, J.

    2014-01-01

    According to the subtitle, the Ghedenck-boeck (1606) by Jacob Duym learned the reader to forever memorize all evil and malevolence brought about by the Spaniards and their adherents, as well as the great love and fidelity, displayed to the Netherlands by the princes of the Dutch House of Nassau. In

  17. TWAS Participating in Social Advancement --An Interview with Prof. Jacob Palis

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    "We should have the promotion of research and development in the industry, and for that scientists should be hired ... Science not only should be promoted by its intellectual challenges of understanding nature, but also should be towards applications in benefit of Society, without reservations that science would be less noble because of that." Prof. Jacob Palls.

  18. Wij zijn geen Crapuul! Jacob Kats’ strijd als vroegsocialistisch theatermaker, redenaar en journalist

    NARCIS (Netherlands)

    Bussels, S.; van Oostveldt, B.

    2012-01-01

    Jacob Kats, a weaver, emerged as a playwright, an orator and a journalist very soon after Belgium became independent. He spoke up for his fellow workers in all these capacities and thus participated in the first social struggles in Belgium. This article highlights several events in 1836, when Kats e

  19. From linear operators to computational biology essays in memory of Jacob T. Schwartz

    CERN Document Server

    2012-01-01

    Contributions by leading researchers in their fields Technical contributions spanning various areas of Computer Science and Physics Explores the many fields in which Jacob T. Schwartz excelled: theorem proving, robotics, complexity theory, motion planning, and the foundations of quantum theory, amongst others

  20. Isolation of the Left Innominate Artery with a Right Aortic Arch in a 76 year-old Man: A Case Report

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Young Tong; Jou, Sung Shick; Bae, Won Kyung [Soonchunhyang University Cheonan Hospital, Cheonan (Korea, Republic of)

    2009-05-15

    Isolation of the left innominate artery is a rare anomaly and is usually combined with a right side aortic arch. Most patients are neonates or children with congenital heart disease. We report the MDCT findings of a right aortic arch and isolation of the left innominate artery in a 76-year-old man without congenital heart disease

  1. Determinant factors of Yemeni maxillary arch dimensions

    Directory of Open Access Journals (Sweden)

    Nabil Muhsen Al-Zubair

    2015-01-01

    Conclusion: Measurements of palatal depth and relationships of the canines to one another and to other teeth thus had the widest ranges, implying that these dimensions are the strongest determinants of maxillary arch size.

  2. Interrupted aortic arch diagnosed by ECG-gated multi-slice computed tomography angiography: a case report

    Institute of Scientific and Technical Information of China (English)

    ZHOU Yang-yang; HAN Ping; FENG Gan-sheng; LIANG Bo

    2005-01-01

    @@ Interrupted aortic arch (IAA) is a rare congenital cardiovascular disease with major intracardiac defects and always with multisystem non-cardiac malformations. It occurs in 1: 10,000 births, and about 1% of the patients with congenital heart defects.

  3. Complete interruption of the aortic arch

    Energy Technology Data Exchange (ETDEWEB)

    Park, Sung Hak; Park, In Kyu; Lee, Won Hwa; Kim, Yong Joo; Kang, Duk Sik; Lee, Jong Tae [Kyungpook National University College of Medicine, Taegu (Korea, Republic of)

    1984-09-15

    Complete interrupture of the aortic arch is one of the least common cardiac malformation. In this condition, continuity between the ascending and descending protions of the aorta is not present, and the descending aorta is supplied through a reversing patent ductus arteriosus. In the majority of the patients a ventricular septal defect is present. Authors have experienced a case of the complete interruption of aortic arch, interruption between the left carotid and the left subclavian artery.

  4. Fractionally Integrated Models With ARCH Errors

    OpenAIRE

    Hauser, Michael A.; Kunst, Robert M.

    1993-01-01

    Abstract: We introduce ARFIMA-ARCH models which simultaneously incorporate fractional differencing and conditional heteroskedasticity. We develop the likelihood function and a numerical estimation procedure for this model class. Two ARCH models - Engle- and Weiss-type - are explicitly treated and stationarity conditions are derived. Finite-sample properties of the estimation procedure are explored by Monte Carlo simulation. An application to the Standard & Poor 500 Index indicates existence o...

  5. Development of the human aortic arch system captured in an interactive three-dimensional reference model.

    Science.gov (United States)

    Rana, M Sameer; Sizarov, Aleksander; Christoffels, Vincent M; Moorman, Antoon F M

    2014-06-01

    Variations and mutations in the human genome, such as 22q11.2 microdeletion, can increase the risk for congenital defects, including aortic arch malformations. Animal models are increasingly expanding our molecular and genetic insights into aortic arch development. However, in order to justify animal-to-human extrapolations, a human morphological, and molecular reference model would be of great value, but is currently lacking. Here, we present interactive three-dimensional reconstructions of the developing human aortic arch system, supplemented with the protein distribution of developmental markers for patterning and growth, including T-box transcription factor TBX1, a major candidate for the phenotypes found in patients with the 22q11.2 microdeletion. These reconstructions and expression data facilitate unbiased interpretations, and reveal previously unappreciated aspects of human aortic arch development. Based on our reconstructions and on reported congenital anomalies of the pulmonary trunk and tributaries, we postulate that the pulmonary arteries originate from the aortic sac, rather than from the sixth pharyngeal arch arteries. Similar to mouse, TBX1 is expressed in pharyngeal mesenchyme and epithelia. The endothelium of the pharyngeal arch arteries is largely negative for TBX1 and family member TBX2 but expresses neural crest marker AP2α, which gradually decreases with ongoing development of vascular smooth muscle. At early stages, the pharyngeal arch arteries, aortic sac, and the dorsal aortae in particular were largely negative for proliferation marker Ki67, potentially an important parameter during aortic arch system remodeling. Together, our data support current animal-to-human extrapolations and future genetic and molecular analyses using animal models of congenital heart disease. © 2013 Wiley Periodicals, Inc.

  6. Right circumflex retro-oesophageal aortic arch with coarctation of a high-positioned right arch

    Energy Technology Data Exchange (ETDEWEB)

    Ahn, Kyung-Sik; Yong, Hwan Seok; Woo, Ok Hee; Kang, Eun-Young [Korea University Guro Hospital, Department of Radiology, Seoul (Korea); Lee, Joo-Won [Korea University Guro Hospital, Department of Paediatrics, Seoul (Korea)

    2007-06-15

    We present a rare case of right circumflex retro-oesophageal aortic arch with coarctation of a high-positioned right arch. A 7-month-old boy presented with a cardiac murmur. Cardiac situs was normal and there was no evidence of an intracardiac shunt or patent ductus arteriosus. MR aortography revealed a right aortic arch that was high-positioned, tortuous and narrowed. This right aortic arch crossed the midline behind the oesophagus and continued as a left-sided descending aorta. The left common carotid and subclavian arteries arose from a large branching vascular structure that derived from the top of the left-sided descending aorta. The right common carotid artery arose from the ascending aorta. The proximal portion of the right common carotid artery showed very severe stenosis and poststenotic dilatation. The right subclavian artery originated distal to the narrowed and tortuous segment of the aortic arch. (orig.)

  7. Arch Index: An Easier Approach for Arch Height (A Regression Analysis

    Directory of Open Access Journals (Sweden)

    Hironmoy Roy

    2012-04-01

    Full Text Available Background: Arch-height estimation though practiced usually in supine posture; is neither correct nor scientific as referred in literature, which favour for standing x-rays or arch-index as yardstick. In fact the standing x-rays can be excused for being troublesome in busy OPD, but an ink-footprint on simple graph-sheet can be documented, as it is easier, cheaper and requires almost no machineries and expertisation. Objective: So this study aimed to redefine the inter-relationship of the radiological standing arch-heights with the arch-index for correlation and regression so that from the later we can derive the radiographical standing arch-height values indirectly, avoiding the actual maneuver. Methods: The study involved 103 adult subjects attending at a tertiary care hospital of North Bengal. From the standing x-rays of foot, the standing navicular, talar heights were measured, and ‘normalised’ with the foot length. In parallel foot-prints also been obtained for arch-index. Finally variables analysed by SPSS software. Result: The arch-index showed significant negative correlations and simple linear regressions with standing navicular height, standing talar height as well as standing normalised navicular and talar heights analysed in both sexes separately with supporting mathematical equations. Conclusion: To measure the standing arch-height in a busy OPD, it is wise to have the foot-print first. Arch-index once get known, can be put in the equations as derived here, to predict the preferred standing arch-heights in either sex.

  8. Generalized Fick Jacobs Approach for describing Adsorption Desorption Kinetics in Irregular Pores under Non Equilibrium Conditions

    CERN Document Server

    Ledesma-Durán, Aldo; Santamaría-Holek, Iván

    2016-01-01

    We present a study exploring the range of applicability of a generalized Fick Jacobs equation in the case when diffusive mass transport of a fluid along a pore includes chemical reactions in the bulk and pore surface. The study contemplates nonequilibrium boundary conditions and makes emphasis on the comparison between the predictions coming from the projected Fick Jacobs description and the corresponding predictions of the original two dimensional mass balance equation, establishing a simple cuantitative criterion of validity of the projected description. For the adsorption desorption process, we demonstrate that the length and the local curvature of the pore are the relevant geometric quantities for its description, allowing for giving very precise predictions of the mass concentration along the pore. Some schematic cases involving adsorption and chemical reaction are used to quantify with detail the concentration profiles in transient and stationary states involving equilibrium and nonequilibrium situation...

  9. Samuel Swinton Jacob e il Jeypore Portfolio: considerazioni sulla documentazione in architettura.

    Directory of Open Access Journals (Sweden)

    Vanicka Arora

    2010-12-01

    Full Text Available Il saggio [i] illustra l’opera di Sir Samuel Swinton Jacob, una figura rilevante dell’epoca coloniale, che fu profondamente coinvolto, come architetto, nel revival dell’architettura tradizionale indiana nello Stato di Jeypore (ora Jaipur durante il primo periodo del XIX secolo. In particolare il focus è sul Catalogo dei dettagli architettonici di Jeypore che è costituito dalla raccolta di una serie di rilievi compiuti dallo stesso Jacob. Il saggio esamina il contesto in cui il Catalogo è stato prodotto e la sua influenza sulle costruzioni tradizionali. Inoltre si evidenzia l’evoluzione del concetto di documentazione in India e le sue implicazioni culturali. [i] Questo saggio è un estratto della tesi di Master di Vanicka Arora.

  10. Pragmática, sociedade (e a alma, uma entrevista com Jacob Mey

    Directory of Open Access Journals (Sweden)

    Daniel do Nascimento e Silva

    2014-01-01

    Full Text Available Jacob Mey, o linguista que fundou (em 1977, com Hartmut Haberland o Journal of Pragmatics e autor de inúmeros livros e artigos no campo da pragmática, visitou o Brasil em novembro/dezembro de 2012, por ocasião da homenagem ao trabalho do pragmaticista Kanavillil Rajagopalan, realizada na Unicamp, onde Rajagopalan desenvolveu trabalho exemplar. A visita de Mey ao Brasil foi uma convite à reflexão sobre o objeto da pragmática, suas vizinhanças, seus principais problemas e sua agenda. Esta entrevista, realizada no Rio de Janeiro, conta a trajetória de Jacob Mey e sua visada crítica sobre os principais temas e problemas da pragmática.

  11. Tubular Steel Arch Stabilized by Textile Membranes

    Directory of Open Access Journals (Sweden)

    Ondrej Svoboda

    2016-10-01

    Full Text Available Tubular steel arch supporting textile membrane roofing is investigated experimentally and numerically. The stabilization effects of the textile membrane on in-plane and out-of-plane behavior of the arch is of primary interest. First a model of a large membrane structure tested in laboratory is described. Prestressed membranes of PVC coated polyester fabric Ferrari® Précontraint 702S were used as a currently standard and excellent material. The test arrangement, loading and resulting load/deflection values are presented. The supporting structure consisted of two steel arch tubes, outer at edge of the membrane and inner supporting interior of the membrane roofing. The stability and strength behavior of the inner tube under both symmetrical and asymmetrical loading was monitored and is shown in some details. Second the SOFiSTiK software was employed to analyze the structural behavior in 3D, using geometrically nonlinear analysis with imperfections (GNIA. The numerical analysis, FE mesh sensitivity, the membrane prestressing and common boundary conditions are validated by test results. Finally a parametrical study concerning stability of mid arch with various geometries in a membrane structure with several supporting arches is presented, with recommendations for a practical design.

  12. Dental Arch Dimension of Malay Ethnic Group

    Directory of Open Access Journals (Sweden)

    H. A. Mohammad

    2011-01-01

    Full Text Available Problem statement: Many previous studies tried to define and put specific measurements for dental arches dimension in different ethnics groups. However, these studies may be specific to an ethnic group and cannot always be applied to other ethnic types. The aim of this study: is to obtain specific dental arch dimensions for Malaysian Malay ethnic groups and compare between both genders. Approach: Involved clinical examination, collection and analysis of 60 dental cast of Malaysian Malay subjects from pure ethnic group (30 males and 30 females, 20-24 years old. All dental landmarks were located and determined and subsequently measurements had been done according to specific points have been selected. Statistical analysis were done using t-test. Results: Dental arch dimension were established in normal occlusion for Malaysian Malay ethnic group in this study. No significant difference was observed in arch dimensions between male and female of Malaysian Malay. Conclusion: These measurement should be considered during treatment, especially in prosthodontics and orthodontics where arch dimension can be modified appreciably.

  13. Full-Arch Rehabilitation of a Patient With Cyclic Neutropenia.

    Science.gov (United States)

    Block, Michael S; Brindis, Marco; Block, Celeste A; Berron, Joaquin M

    2015-09-01

    The purpose of this report is to discuss the treatment of a patient with cyclic neutropenia. This patient presented with flared teeth, thin alveolar bone, and mobile teeth. A staged approach was used to remove her teeth, augment the bone, use immediate fixed provisional to determine the type of final prostheses, and ultimately to use cone-shaped overdenture attachments to retain her final prostheses. The result was rehabilitation of the patient with esthetic full-arch fixed-removable dentures with no adverse sequelae in this patient with this systemic disease.

  14. Guest blog: Jacob Davidsen and Paul McIlvenny on Experiments with Big Video

    DEFF Research Database (Denmark)

    Davidsen, Jacob; Mcilvenny, Paul Bruce

    2016-01-01

    How good are your video records? One angle? Two? Wide-angle? Was the camera static or did you move to catch things – and miss other things? How good was the sound? All of us have occasionally been frustrated with what we find on the screen when we come to analyse it, but Jacob Davidsen and Paul M......Ilvenny have some more fundamental concerns. Just how “big” should data be?...

  15. Improved characterization of small "u" for Jacob pumping test analysis methods.

    Science.gov (United States)

    Alexander, Scott C; Saar, Martin O

    2012-01-01

    Numerous refinements have been proposed to traditional pumping test analyses, yet many hydrogeologists continue to use the Jacob method due to its simplicity. Recent research favors hydraulic tomography and inverse numerical modeling of pumping test data. However, at sites with few wells, or relatively short screens, the data requirements of these methods may be impractical within physical and fiscal constraints. Alternatively, an improved understanding of the assumptions and limitations of Theis and, due to their widespread usage, Jacob analyses, leads to improved interpretations in data-poor environments. A fundamental requirement of Jacob is a "small" value of u = f(r(2)/t), with radial distance, r, and pumping time, t. However, selection of a too stringent (i.e., too low) maximum permissible u-value, u(max), results in rejection of usable data from wells beyond a maximum radius, r(max). Conversely, data from small radii, less than r(min), where turbulent- and vertical-flow components arise, can result in acceptance of inappropriate data. Usage of drawdown data from wells too close to the pumping well, and exclusion of data from wells deemed too far, can cause unrealistic aquifer transmissivity, permeability, and storativity determinations. Here, data from an extensive well field in a glacial-outwash aquifer in north-central Minnesota, USA, are used to develop a new estimate for u(max). Traditionally quoted values for u(max) range from 0.01 to 0.05. Our proposed value for Jacob distance-drawdown analyses is significantly higher with u(max) up to 0.2, resulting in larger allowable r(max)-values and a higher likelihood of inclusion of additional wells in such pumping test analyses.

  16. La evolución poética de Porfirio Barba Jacob

    Directory of Open Access Journals (Sweden)

    Germán Posada Mejía

    1959-08-01

    Full Text Available Poeta filosófico - poeta ante todo-, Porfirio Barba-Jacob es uno de los líricos castellanos contemporáneos de mayor ambición metafísica, uno de los que más conscientemente y con mayor insistencia abordan las causas eternas de la poesía y el pensamiento humanos.

  17. 'Counterfeiting his maister' : Shared Folly in The History of Jacob and Esau

    NARCIS (Netherlands)

    Pelt, van N.T.

    2016-01-01

    La pièce calviniste Jacob and Esau se sert de la folie (« folly ») pour traiter de façon burlesque des moments doctrinalement incompatibles. Par ce biais la pièce soulève la question du rapport entre réalité et spectacle, c’est-à-dire si jouer quelque chose la rend réelle. D’un côté, l’approche du d

  18. De la homofobia a la homofonía: Barba-Jacob y el amor de los muchachos

    OpenAIRE

    Martínez Millán, Hernán

    2009-01-01

    El interés de este trabajo es describir la materia común que dispone Porfirio Barba-Jacob en su poética homoerótica. La tesis que sostendré es que Barba-Jacob recupera para el verso la cuestión del amor de los muchachos: Elegía platónica, Amo a un joven de insólita pureza

  19. Endothelium in the pharyngeal arches 3, 4 and 6 is derived from the second heart field.

    Science.gov (United States)

    Wang, Xia; Chen, Dongying; Chen, Kelley; Jubran, Ali; Ramirez, AnnJosette; Astrof, Sophie

    2017-01-15

    Oxygenated blood from the heart is directed into the systemic circulation through the aortic arch arteries (AAAs). The AAAs arise by remodeling of three symmetrical pairs of pharyngeal arch arteries (PAAs), which connect the heart with the paired dorsal aortae at mid-gestation. Aberrant PAA formation results in defects frequently observed in patients with lethal congenital heart disease. How the PAAs form in mammals is not understood. The work presented in this manuscript shows that the second heart field (SHF) is the major source of progenitors giving rise to the endothelium of the pharyngeal arches 3 - 6, while the endothelium in the pharyngeal arches 1 and 2 is derived from a different source. During the formation of the PAAs 3 - 6, endothelial progenitors in the SHF extend cellular processes toward the pharyngeal endoderm, migrate from the SHF and assemble into a uniform vascular plexus. This plexus then undergoes remodeling, whereby plexus endothelial cells coalesce into a large PAA in each pharyngeal arch. Taken together, our studies establish a platform for investigating cellular and molecular mechanisms regulating PAA formation and alterations that lead to disease.

  20. Precast Pearl-Chain concrete arch bridges

    DEFF Research Database (Denmark)

    Halding, Philip Skov; Hertz, Kristian Dahl; Schmidt, Jacob Wittrup

    2015-01-01

    A Pearl-Chain Bridge is a closed-spandrel arch bridge consisting of a number of straight pre-fabricated so called Super-Light Deck elements put together in an arch shape by post-tensioning cables. Several Pearl-Chain arches can be positioned adjacent to each other by a crane to achieve a bridge...... the technology was used. We also study other important components and details in the Pearl-Chain Bridge concept and review the effects of different types of loads. A theoretical case study of a circular 30 m span Pearl-Chain Bridge is presented showing the influence of a number of parameters: The number of post-tensioning......, and gives a large positive bending moment below the load and a smaller negative bending moment in the unloaded side. When the Pearl-Chain Bridge concept is compared to other pre-fabricated arch bridge solutions we find a number of advantages when using Pearl-Chain Bridges: Straight elements, combination...

  1. MATHEMATICAL ANALYSIS OF DENTAL ARCH OF CHILDREN IN NORMAL OCCLUSION: A LITERATURE REVIEW

    Directory of Open Access Journals (Sweden)

    M. Abu-Hussein DDS, MScD, MSc, DPD

    2012-03-01

    Full Text Available AIM. This paper is an attempt to compare and analyze the various mathematical models for defining the dental arch curvature of children in normal occlusion based upon a review of available literature. Background. While various studies have touched upon ways to cure or prevent dental diseases and upon surgical ways for teeth reconstitution to correct teeth anomalies during childhood, a substantial literature also exists, attempting to mathematically define the dental arch of children in normal occlusion. This paper reviews these dental studies and compares them analytically. Method. The paper compares the different mathematical approaches, highlights the basic assumptions behind each model, underscores the relevancy and applicability of the same, and also lists applicable mathematical formulae. Results. Each model has been found applicable to specific research conditions, as a universal mathematical model for describing the human dental arch still eludes satisfactory definition. The models necessarily need to include the features of the dental arch, such as shape, spacing between teeth and symmetry or asymmetry, but they also need substantial improvement. Conclusions. While the paper shows that the existing models are inadequate in properly defining the human dental arch, it also acknowledges that future research based on modern imaging techniques and computeraided simulation could well succeed in deriving an allinclusive definition for the human dental curve till now eluding the experts.

  2. Dilatation of the aneurysmal sac after total arch replacement.

    Science.gov (United States)

    Watanuki, Hirotaka; Ogino, Hitoshi; Matsuda, Hitoshi; Minatoya, Kenji; Sasaki, Hiroaki; Fukuda, Tetsuya; Kitamura, Soichiro

    2008-02-01

    In our institution, total arch replacement for distal arch aneurysms is performed through a median sternotomy with antegrade selective cerebral perfusion. The distal anastomosis to the completely transected descending aorta is made through the aneurysmal sac. We report on three interesting cases presenting late dilatation of the aneurysmal sac due to collateral flow after total arch replacement.

  3. Assembly and lifting of Pearl-Chain arches

    DEFF Research Database (Denmark)

    Halding, Philip Skov; Hertz, Kristian Dahl; Viebæk, N.E.

    2015-01-01

    Pearl-Chain arches were invented at the Technical University of Denmark in cooporation with the company Abeo A/S. The system uses specially designed, pre-fabricated concrete elements that are post-tensioned together into an arch shape, which is then lifted into place. The arches can be used both...

  4. The Diary of Frances Jacobs: Astronomical Observations by a 19th-century Oregon Woman

    Science.gov (United States)

    McGown, R. D.

    2002-12-01

    This abstract summarizes my research, transcription and editing of Francis Jacob's 170-page handwritten astronomical diary. This diary is a unique example of a time in early Portland history, illustrating the mind of a young woman who was interested in science and astronomy. Reflected in her diary are the discoveries and mention of leading astronomers of the day like Emerson Bernard and Edward Pickering. Francis Jacobs lived in an era of the great refractors For example, ``The Leviathan," built by Lord Rosse in Ireland was completed in 1847. In this 72-inch telescope, stars of 18th magnitude could be seen. The first spiral nebulae to be revealed was M51 - known today as the Whirlpool Galaxy. The Earl was the first to suggest that these spirals could actually be rotating masses of stars. At the turn of the century, study of observational astronomy was rooted in naked eye observing, study of binary stars and nebula. This was a time when women were becoming interested in the sciences and had begun to play an important role in science and astronomy. It was an incredible inspiration for other women across the country to hear what was happening on the astronomical frontiers at Harvard. Some constellation asterisms used in Francis Jacob's diary were different than they are today. One asterism in particular, the Egyptian Cross, is relatively unknown now. The summer triangle and winter circle asterisms were used in her notes and obviously popular in her era, as today. Her written comments included some Messier catalogue numbers and in some case written on her sketches and diagrams nicknames, such as the 'Dumbbell' nebula. She also referred to M99 as `St. Katherine's Wheel', a nickname that is not in common use today.

  5. The origin of the logic of symbolic mathematics Edmund Husserl and Jacob Klein

    CERN Document Server

    Hopkins, Burt C

    2011-01-01

    Burt C. Hopkins presents the first in-depth study of the work of Edmund Husserl and Jacob Klein on the philosophical foundations of the logic of modern symbolic mathematics. Accounts of the philosophical origins of formalized concepts-especially mathematical concepts and the process of mathematical abstraction that generates them-have been paramount to the development of phenomenology. Both Husserl and Klein independently concluded that it is impossible to separate the historical origin of the thought that generates the basic concepts of mathematics from their philosophical meanings. Hopkins explores how Husserl and Klein arrived at their conclusion and its philosophical implications for the modern project of formalizing all knowledge.

  6. Aletta Jacobs

    NARCIS (Netherlands)

    Bosch, Mineke; Bynum, W.F.; Bynum, Helen

    2007-01-01

    This dictionary provides authoritative biographical coverage of major medical practitioners in all times and cultures. While its emphasis is on practitioners within the Western medical tradition, it also covers practitioners of alternative medicines, as well as major figures within traditional Chine

  7. In-plane elastic stability of fixed parabolic shallow arches

    Institute of Scientific and Technical Information of China (English)

    CAI JianGuo; FENG Jian; CHEN Yao; HUANG LiFeng

    2009-01-01

    The nonlinear behavior of fixed parabolic shallow arches subjected to a vertical uniform load is inves-tigated to evaluate the in-plane buckling load. The virtual work principle method is used to establish the non-linear equilibrium and buckling equations. Analytical solutions for the non-linear in-plane sym-metric snap-through and antisymmetric bifurcation buckling loads are obtained. Based on the least square method, an approximation for the symmetric buckling load of fixed parabolic arch is proposedto simplify the solution process. And the relation between modified slenderness and buckling modes are discussed. Comparisons with the results of finite element analysis demonstrate that the solutions are accurate. A cable-arch structure is presented to improve the in-plane stability of parabolic arches. The comparison of buckling loads between cable-arch systems and arches only show that the effect of cables becomes more evident with the increase of arch's modified slenderness.

  8. Evolution Characteristic Analysis of Pressure-arch of a Double-arch Tunnel in Water-rich Strata

    Directory of Open Access Journals (Sweden)

    C. L. Li

    2016-03-01

    Full Text Available It is of importance to analyze the morphological characterization, the evolution process and the skewed effect of pressure-arch of a double-arch tunnel in the water-rich strata. Taking a buried depth 80 m double-arch tunnel as an example, a computational model of the double-arch tunnel was built by using FLAC3D technique. Then considering some aspects including groundwater conditions, tunnel depth, construction sequences and permeability coefficients, the coupling effect of stress field and seepage field in the pressure-arch of the double-arch tunnel was analyzed. The results show that the thickness of the pressure-arch induced by step-by-step excavation and display a step-descent skewed distribution from the left to the right of the double-arch tunnel. The permeability coefficient has a significant influence on the shape and the skewed effect of the pressure arch. The excavation of the bench method has a better arching condition than that of the expanding method. The abtained results provide a basic reference for the rock reinforcement design and safety construction of double-arch tunnels in the water-rich strata.

  9. Multislice CT angiography of interrupted aortic arch

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Dong Hyun; Goo, Hyun Woo [Asan Medical Center, Department of Radiology and Research Institute of Radiology, Seoul (Korea); Seo, Dong-Man; Yun, Tae-Jin; Park, Jeong-Jun [Asan Medical Center, University of Ulsan College of Medicine, Department of Paediatric Cardiac Surgery, Seoul (Korea); Park, In-Sook; Ko, Jae Kon; Kim, Young Hwee [Asan Medical Center, University of Ulsan College of Medicine, Department of Paediatric Cardiology, Seoul (Korea)

    2008-01-15

    Interrupted aortic arch (IAA) is defined as complete luminal and anatomic discontinuity between the ascending and descending aorta. Because almost all patients with IAA become critically ill during the neonatal period, they should undergo urgent corrective surgery. This clinical urgency necessitates a fast and accurate noninvasive diagnostic method. Although echocardiography remains the primary imaging tool for this purpose, it is not always sufficient for planning surgical correction of IAA, principally due to a limited acoustic window and the inexperience of imagers. In this context, multislice CT angiography is regarded as an appropriate imaging technique complementary to echocardiography because it is fast, accurate, and objective for the diagnosis of IAA. In this article we describe what cardiac radiologists should know about IAA in their clinical practice, including clinicopathological features, CT features with contemporary surgical methods and postoperative complications, and differentiation from coarctation of the aorta and aortic arch atresia. (orig.)

  10. Contributions of Johann jacob Huber to the surface anatomy of the spinal cord and meninges.

    Science.gov (United States)

    Rengachary, Setti S; Pelle, Dominic; Guthikonda, Murali

    2008-06-01

    From prehistoric times, man has been aware that injury to the spine may result in paralysis of the limbs; this is reflected in bas-relief figures found at Nineweh in ancient Mesopotamia, in a hunting scene that depicts a lioness wounded by King Ashurbanipal. The Edwin Smith papyrus gives many case illustrations of spinal cord injury resulting in paralysis, yet early physicians were unaware of the anatomy of the spinal cord. Galen performed prospective studies in animals by sectioning the spinal cord at varying levels and observing the commensurate paralysis and sensory loss. Real advances in the understanding of spinal cord anatomy did not occur until human cadaveric dissections were undertaken; even then, the knowledge of the anatomy of the spinal cord lagged behind that of other body structures. Johann Jacob Huber appears to be the first anatomist to focus on the spinal cord almost exclusively. His descriptions, and especially his illustrations that depict spinal cord surface anatomy, are impressive with regard to their accuracy and their sense of photorealism. Indeed, his illustrations seem to compare well with the anatomic drawings in contemporary anatomic texts. Yet, we were unable to find a single article in the entire English-language literature depicting his illustrations. We conclude that the description and anatomic illustrations by Johann Jacob Huber remain a hidden gem in the history of human spinal anatomy.

  11. Reassessing "Jacob's case": a serial killer re-examined after ten years.

    Science.gov (United States)

    Kalian, M; Birger, M; Witztum, E

    2004-01-01

    The current study re-examines an exceptional case of a serial killer incarcerated since a decade ago. "Jacob" is the first serial killer apprehended in Israel. His known actions were committed during the eighties of the last century, and continued for eleven years. The victims were elderly individuals, including both his parents. Shortly after incarceration he became overtly schizophrenic and underwent five hospitalisations. The case is re-examined in view of changes, both in the perpetrator's diagnosis and criminal legislation. Was Jacob doomed to become a serial killer, or could his fate be avoided through early professional intervention? Were the killings presenting symptoms of a psychotic or pre-psychotic phase? Should he be eligible for a retrial? What would have been his position with the current law in view of the new 300A(a) clause ("Reduced Punishment") of the Israeli Criminal Code? Could he ever be released back to the community? These are some of the questions to be addressed.

  12. Employment contracts and marriage settlements in Thomas Mann's The Tales of Jacob

    Directory of Open Access Journals (Sweden)

    Elisabetta Abignente

    2012-04-01

    Full Text Available Together with the representation of the justice court, the pact scene is one of the narrative elements that are more interesting for ‘Law in Literature’ studies. The pact, in his double meaning of ‘horizontal’ agreement between two people and ‘vertical’ alliance between a man and a supreme divine or diabolical being, is particularly present in the narrative work of Thomas Mann. The tale of the seven years biblical waiting of Jacob and Rachel that is told in the first volume of Joseph tetralogy, Die Geschichten Jaakobs, gives one of the most significant examples in this sense. This is the series of three contracts signed by Jacob and Laban, Rachel’s father, which are anomalous because they are employment contracts and marriage settlements at the same time. By a careful rereading of this scene, the paper aims to investigate which is the main narrative function of the scene of the pact in the fictional context. Totally absent from the biblical source, the scene of the contract becomes the instrument, inside the novel, of that process of ‘dilatation’ and ‘humanization’ of the myth on which Mann’s monumental rewriting is found.

  13. Las máscaras del poeta : Sobre la poesía de Porfirio Barba Jacob

    OpenAIRE

    1997-01-01

    La crítica ha señalado repetidas veces el carácter postmodernista o epigonal de la poesía de Porfirio Barba Jacob, subsidiaria de un lenguaje y un imaginario anacrónicos. Nuestro artículo intenta leer en esta obra poética la singular construcción de la subjetividad desde la situación marginal en la que se inscribe Porfirio Barba Jacob: como homosexual, judío y un escritor situado fuera del territorio nacional. Esta peculiar posición desde la cual elabora una serie de seudónimos que complejiza...

  14. In-plane elastic stability of fixed parabolic shallow arches

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The nonlinear behavior of fixed parabolic shallow arches subjected to a vertical uniform load is inves- tigated to evaluate the in-plane buckling load. The virtual work principle method is used to establish the non-linear equilibrium and buckling equations. Analytical solutions for the non-linear in-plane sym- metric snap-through and antisymmetric bifurcation buckling loads are obtained. Based on the least square method, an approximation for the symmetric buckling load of fixed parabolic arch is proposed to simplify the solution process. And the relation between modified slenderness and buckling modes are discussed. Comparisons with the results of finite element analysis demonstrate that the solutions are accurate. A cable-arch structure is presented to improve the in-plane stability of parabolic arches. The comparison of buckling loads between cable-arch systems and arches only show that the effect of cables becomes more evident with the increase of arch’s modified slenderness.

  15. Accuracy of impressions obtained with dual-arch trays.

    Science.gov (United States)

    Wöstmann, Bernd; Rehmann, Peter; Balkenhol, Markus

    2009-01-01

    This study aimed to analyze the accuracy resulting from dual-arch impressions when compared to conventional impressions in complex preparations (ie, inlay and partial crown). One hundred eighty impressions were made using two different dual-arch trays; conventional trays served as the control. The accuracy of the dies obtained (Fuji-Rock EP, GC Europe) was assessed indirectly from the change of 59 transversal dimensions. Statistical analysis (t test, analysis of variance) revealed that less rigid dual-arch trays performed better than rigid ones. Though the inlay preparation was more difficult to reproduce with dual-arch trays, it can be concluded that the accuracy obtainable with nonrigid dual-arch trays is comparable to impressions taken from full-arch trays.

  16. Asymptotics of the QMLE for General ARCH(q) Models

    DEFF Research Database (Denmark)

    Kristensen, Dennis; Rahbek, Anders Christian

    2009-01-01

    Asymptotics of the QMLE for Non-Linear ARCH Models Dennis Kristensen, Columbia University Anders Rahbek, University of Copenhagen Abstract Asymptotic properties of the quasi-maximum likelihood estimator (QMLE) for non-linear ARCH(q) models -- including for example Asymmetric Power ARCH and log......-ARCH -- are derived. Strong consistency is established under the assumptions that the ARCH process is geometrically ergodic, the conditional variance function has a finite log-moment, and finite second moment of the rescaled error. Asymptotic normality of the estimator is established under the additional assumption...... that certain ratios involving the conditional variance function are suitably bounded, and that the rescaled errors have little more than fourth moment. We verify our general conditions, including identification, for a wide range of leading specific ARCH models....

  17. Aortic arch blunt injury in front-seat passenger.

    Science.gov (United States)

    Türkmen, Nursel; Eren, Bülent; Aydin, Şule Akköse

    2013-10-01

    Aortic arch blunt injury has highly lethal nature. Because the physical examination findings are subtle, immediate medical evaluation is very important. The case was a 72-year-old woman. Massive haemorrhage in the left haemotorax, contusion area in the left lung and a traumatic transection of the distal aortic arch was observed during autopsy. We described intersting autopsy case of aortic arch blunt injury.

  18. Critical thrombotic obstruction of transverse aortic arch in a neonate

    Directory of Open Access Journals (Sweden)

    Karunakar Vadlamudi

    2015-01-01

    Full Text Available A 3-day-old neonate presented with features suggestive of coarctation of aorta. Echocardiography showed a large organized thrombus in the transverse arch causing obstruction to theaortic arch and carotids with partial recanalization. Patient underwent surgical thromboendarterectomy with arch reconstruction. The evaluation did not reveal any hematological abnormalities and suspected to be due to fetal thromboembolism. Patient improved well, and no neurological deficits were observed during follow-up.

  19. Mathematical model of a moment-less arch.

    Science.gov (United States)

    Lewis, W J

    2016-06-01

    This paper presents a mathematical model for predicting the geometrical shapes of rigid, two-pin, moment-less arches of constant cross section. The advancement of this work lies in the inclusion of arch self-weight and the ability to produce moment-less arch forms for any span/rise ratio, and any ratio of uniformly distributed load per unit span, w, to uniformly distributed arch weight per unit arch length, q. The model is used to derive the shapes of two classical 'moment-less' arch forms: parabolic and catenary, prior to demonstrating a general case, not restricted by the unrealistic load assumptions (absence of q, in the case of a parabolic form, or no w, in the case of a catenary arch). Using the same value of span/rise ratio, and w/q>1, the behaviour of the moment-less and parabolic arches under permanent loading, (w+q), is analysed. Results show the former to be developing much lower stresses than its parabolic rival, even when there are relatively small differences in the two geometries; for a medium span/rise ratio of 4 and w/q=2, differences in the parabolic and moment-less arch geometries would, in practical terms, be viewed as insignificant, but the stresses in them are different.

  20. An Electrostatically Actuated MEMS Arch Band-Pass Filter

    Directory of Open Access Journals (Sweden)

    Hassen M. Ouakad

    2013-01-01

    Full Text Available This work presents an investigation of the dynamics of micromachined arches resonators and their potential to be utilized as band-pass filters. The arches are actuated by a DC electrostatic load superimposed to an AC harmonic load. The dynamic response of the arch is studied analytically using a Galerkin-based reduced-order model when excited near its fundamental and third natural frequencies. Several simulation results are presented demonstrating interesting jumps and snap-through behavior of the arches and their attractive features for uses as band-pass filters, such as their sharp roll-off from pass bands to stop bands and their flat response.

  1. The impact of foot arch height on quality of life in 6-12 year olds

    Directory of Open Access Journals (Sweden)

    Daniel López López

    2015-01-01

    Full Text Available Objective:To determine whether arch height has an effect on the health-related quality of life of schoolchildren.Methods:One hundred and thirteen schoolchildren attended an out-patient centre where self-reported data were recorded, their feet were classified into one of three groups according to their arch index (high, normal or low and the scores obtained from the Foot Health Status Questionnaire (FHSQ - Spanish version were compared.Results:The groups with high, low and normal arch recorded lower scores in Section One for the general foot health and footwear domains and higher scores in foot pain and foot function. In Section Two they obtained lower scores in general health and higher scores in physical activity, social capacity and vigour.Conclusions:Comparison of the scores obtained reveals that arch height has a negative impact on quality of life. Given the limited extent of available evidence in respect of the aetiology and treatment of foot diseases and deformities, these findings reveal the need to implement programmes to promote foot health and carry out further research into this commonly occurring disabling condition.

  2. Right-sided aortic arch with anomalous origin of the left subclavian artery: Case report

    Directory of Open Access Journals (Sweden)

    Vučurević Goran

    2011-01-01

    Full Text Available Introduction. A right-sided aortic arch is a rare congenital defect of the aorta with incidence of 0.05% to 0.1% reported in published series. Usually it is associated with congenital heart anomalies and esophageal and tracheal compression symptoms. We present a case of a right-sided aortic arch of anomalous left subclavian artery origin, accidentally revealed during multislice CT (MSCT supraaortic branches angiography. Case Outline. A 53-year-old female patient was examined at the Outpatients’ Unit of the Vascular Surgery University Clinic for vertigo, occasional dizziness and difficulty with swallowing. Physical examination revealed a murmur of the left supraclavicular space, with 15 mmHg lower rate of arterial tension on the left arm. Ultrasound of carotid arteries revealed 60% stenosis of the left subclavian artery and bilateral internal carotid artery elongation. MSCT angiography revealed a right-sided aortic arch with aberrant separation of the left subclavian artery that was narrowed 50%, while internal carotid arteries were marginally elongated. There was no need for surgical treatment or percutaneous interventions, so that conservative treatment was indicated. Conclusion. A right-sided aortic arch is a very rare anomaly of the location and branching of the aorta. Multislice CT angiography is of great importance in the diagnostics of this rare disease.

  3. Jacob Lorhard’s Ontology: A 17th Century Hypertext on the Reality and Temporality of the World of Intelligibles

    DEFF Research Database (Denmark)

    Øhrstrøm, Peter; Schärfe, Henrik; Uckelman, Sara

    2008-01-01

    Jacob Lorhard published his ontology in 1606. In this work the term ontologia ‘ontology’ was used for the first time ever. In this paper, it is argued that Lorhard’s ontology provides a useful key to the understanding of the early 17th-century world view in Protestant Europe. Among other things, ...

  4. Jacob Lorhard's ontology: A 17th century hypertext on the reality and temporality of the world of intelligibles

    NARCIS (Netherlands)

    Øhrstrøm, P.; Schärfe, H.; Uckelman, S.L.

    2008-01-01

    Jacob Lorhard published his ontology in 1606. In this work the term ontologia ‘ontology’ was used for the first time ever. In this paper, it is argued that Lorhard’s ontology provides a useful key to the understanding of the early 17th-century world view in Protestant Europe. Among other things, Lor

  5. Jacob van Zuden and the Early Fourteenth-Century Expansion of the Hospitallers in the Bishopric of Utrecht

    NARCIS (Netherlands)

    Koorn, F.W.J.; Mol, J.A.

    2015-01-01

    The protagonist in this paper is Jacob van Zuden, commander of the Hospitaller convent of Utrecht in the first two decades of the fourteenth century. During his administration six new dependent Hospitaller houses were founded in the bishopric of Utrecht, the most important of which was the convent o

  6. A Functional Version of the ARCH Model

    CERN Document Server

    Hormann, Siegfried; Reeder, Ron

    2011-01-01

    Improvements in data acquisition and processing techniques have lead to an almost continuous flow of information for financial data. High resolution tick data are available and can be quite conveniently described by a continuous time process. It is therefore natural to ask for possible extensions of financial time series models to a functional setup. In this paper we propose a functional version of the popular ARCH model. We will establish conditions for the existence of a strictly stationary solution, derive weak dependence and moment conditions, show consistency of the estimators and perform a small empirical study demonstrating how our model matches with real data.

  7. A Binomial Integer-Valued ARCH Model.

    Science.gov (United States)

    Ristić, Miroslav M; Weiß, Christian H; Janjić, Ana D

    2016-11-01

    We present an integer-valued ARCH model which can be used for modeling time series of counts with under-, equi-, or overdispersion. The introduced model has a conditional binomial distribution, and it is shown to be strictly stationary and ergodic. The unknown parameters are estimated by three methods: conditional maximum likelihood, conditional least squares and maximum likelihood type penalty function estimation. The asymptotic distributions of the estimators are derived. A real application of the novel model to epidemic surveillance is briefly discussed. Finally, a generalization of the introduced model is considered by introducing an integer-valued GARCH model.

  8. Jacob y el otro: una lectura desde el deseo mimético

    OpenAIRE

    Navascués, J. (Javier) de

    2009-01-01

    El artículo propone el análisis del cuento de Juan Carlos Onetti “Jacob y el otro” a partir de la teoría antropológica de René Girard. Así, el universo de Onetti aparece configurado por distintos aspectos del llamado “deseo mimético”. Este concepto determina que las relaciones de deseo entre un sujeto y un objeto no se establecen de forma directa, sino a través de un juego triangular formado por un sujeto, un modelo y un objeto. Al objeto se llega a través del modelo, a quien Girard denomina ...

  9. When is the next extending of Fick-Jacobs equation necessary?

    Science.gov (United States)

    Kalinay, Pavol

    2013-08-01

    Applicability of the effective one-dimensional equations, such as Fick-Jacobs equation and its extensions, describing diffusion of particles in 2D or 3D channels with varying cross section A(x) along the longitudinal coordinate x, is studied. The leading nonstationary correction to Zwanzig-Reguera-Rubí equation [R. Zwanzig, J. Phys. Chem. 96, 3926 (1992), 10.1021/j100189a004; D. Reguera and J. M. Rubí, Phys. Rev. E 64, 061106 (2001), 10.1103/PhysRevE.64.061106] is derived and tested on the exactly solvable model, diffusion in a 2D linear cone. The effects of such correction are demonstrated and discussed on elementary nonstationary processes, a time dependent perturbation of the stationary flow and calculation of the mean first passage time.

  10. Informing Physics: Jacob Bekenstein and the Informational Turn in Theoretical Physics

    Science.gov (United States)

    Belfer, Israel

    2014-03-01

    In his PhD dissertation in the early 1970s, the Mexican-Israeli theoretical physicist Jacob Bekenstein developed the thermodynamics of black holes using a generalized version of the second law of thermodynamics. This work made it possible for physicists to describe and analyze black holes using information-theoretical concepts. It also helped to transform information theory into a fundamental and foundational concept in theoretical physics. The story of Bekenstein's work—which was initially opposed by many scientists, including Stephen Hawking—highlights the transformation within physics towards an information-oriented scientific mode of theorizing. This "informational turn" amounted to a mild-mannered revolution within physics, revolutionary without being rebellious.

  11. Nuclear Translocation of Jacob in Hippocampal Neurons after Stimuli Inducing Long-Term Potentiation but Not Long-Term Depression

    Science.gov (United States)

    Behnisch, Thomas; YuanXiang, PingAn; Bethge, Philipp; Parvez, Suhel; Chen, Ying; Yu, Jin; Karpova, Anna; Frey, Julietta U.; Mikhaylova, Marina; Kreutz, Michael R.

    2011-01-01

    Background In recent years a number of potential synapto-nuclear protein messengers have been characterized that are thought to be involved in plasticity-related gene expression, and that have the capacity of importin- mediated and activity-dependent nuclear import. However, there is a surprising paucity of data showing the nuclear import of such proteins in cellular models of learning and memory. Only recently it was found that the transcription factor cyclic AMP response element binding protein 2 (CREB2) transits to the nucleus during long-term depression (LTD), but not during long-term potentiation (LTP) of synaptic transmission in hippocampal primary neurons. Jacob is another messenger that couples NMDA-receptor-activity to nuclear gene expression. We therefore aimed to study whether Jacob accumulates in the nucleus in physiological relevant models of activity-dependent synaptic plasticity. Methodology/Principal Findings We have analyzed the dynamics of Jacob's nuclear import following induction of NMDA-receptor dependent LTP or LTD at Schaffer collateral-CA1 synapses in rat hippocampal slices. Using time-lapse imaging of neurons expressing a Jacob-Green-Fluorescent-Protein we found that Jacob rapidly translocates from dendrites to the nucleus already during the tetanization period of LTP, but not after induction of LTD. Immunocytochemical stainings confirmed the nuclear accumulation of endogenous Jacob in comparison to apical dendrites after induction of LTP but not LTD. Complementary findings were obtained after induction of NMDA-receptor dependent chemical LTP and LTD in hippocampal primary neurons. However, in accordance with previous studies, high concentrations of NMDA and glycine as well as specific activation of extrasynaptic NMDA-receptors resembling pathological conditions induce an even more profound increase of nuclear Jacob levels. Conclusions/Significance Taken together, these findings suggest that the two major forms of NMDA-receptor dependent

  12. Nuclear translocation of jacob in hippocampal neurons after stimuli inducing long-term potentiation but not long-term depression.

    Directory of Open Access Journals (Sweden)

    Thomas Behnisch

    Full Text Available BACKGROUND: In recent years a number of potential synapto-nuclear protein messengers have been characterized that are thought to be involved in plasticity-related gene expression, and that have the capacity of importin- mediated and activity-dependent nuclear import. However, there is a surprising paucity of data showing the nuclear import of such proteins in cellular models of learning and memory. Only recently it was found that the transcription factor cyclic AMP response element binding protein 2 (CREB2 transits to the nucleus during long-term depression (LTD, but not during long-term potentiation (LTP of synaptic transmission in hippocampal primary neurons. Jacob is another messenger that couples NMDA-receptor-activity to nuclear gene expression. We therefore aimed to study whether Jacob accumulates in the nucleus in physiological relevant models of activity-dependent synaptic plasticity. METHODOLOGY/PRINCIPAL FINDINGS: We have analyzed the dynamics of Jacob's nuclear import following induction of NMDA-receptor dependent LTP or LTD at Schaffer collateral-CA1 synapses in rat hippocampal slices. Using time-lapse imaging of neurons expressing a Jacob-Green-Fluorescent-Protein we found that Jacob rapidly translocates from dendrites to the nucleus already during the tetanization period of LTP, but not after induction of LTD. Immunocytochemical stainings confirmed the nuclear accumulation of endogenous Jacob in comparison to apical dendrites after induction of LTP but not LTD. Complementary findings were obtained after induction of NMDA-receptor dependent chemical LTP and LTD in hippocampal primary neurons. However, in accordance with previous studies, high concentrations of NMDA and glycine as well as specific activation of extrasynaptic NMDA-receptors resembling pathological conditions induce an even more profound increase of nuclear Jacob levels. CONCLUSIONS/SIGNIFICANCE: Taken together, these findings suggest that the two major forms of NMDA

  13. Jacob Lawrence’s Migration series: a pictorial memory of black America Les Migrations de Jacob Lawrence : souvenir pictural de l’Amérique noire

    Directory of Open Access Journals (Sweden)

    Eliane Elmaleh

    2009-10-01

    Full Text Available Jacob Lawrence, artiste afro-américain décédé en juin 2000, a étudié la condition humaine et plus spécifiquement la condition des Afro-américains durant plus de six décennies. Ses mises en scène visuelles, sous forme de séries de peintures aux thématiques variées vont d’événements historiques comme la Grande Migration des Noirs dans les années 1920-1930 à l’étude de personnages héroïques, symboles mythiques de la lutte pour l’émancipation et l’égalité. Cet article tente de mettre en lumière l’importance d’une période pour les Noirs américains qui, pour se libérer des lourdes conséquences de l’esclavage essayèrent de construire une nouvelle identité noire en affirmant l’existence d’une culture noire. Je tenterai de déterminer la façon dont Lawrence s’est positionné dans cette perspective et sa représentation de l’histoire afro-américaine au travers principalement de The Migration of the Negro, série de tableaux peints sous un mode narratif qui raconte la fuite de centaines de milliers de noirs américains du Sud rural vers le Nord urbain industrialisé après la Première Guerre mondiale. J’explorerai les multiples facettes de sa vision de la Grande Migration en tant qu’historien et artiste.

  14. Three-dimensional measurement of foot arch in preschool children

    Directory of Open Access Journals (Sweden)

    Chang Hsun-Wen

    2012-09-01

    Full Text Available Abstract Background The prevalence of flexible flatfoot is high among preschool-aged children, but the effects of treatment are inconclusive due to the unclear definitions of normal flatfoot. To date, a universally accepted evaluation method of the foot arch in children has not been completely established. Our aims of this study were to establish a new method to evaluate the foot arch from a three dimensional perspective and to investigate the flexibility of the foot arch among children aged from two to six. Methods A total of 44 children aged from two to six years of age were put into five age groups in this study. The navicular height was measured with one leg standing, and both feet were scanned separately in both sitting and one leg standing positions to compute the foot arch volume. The arch volume index, which represents the ratio of the difference in volume between sitting and one leg standing positions to the volume when sitting was calculated to demonstrate the flexibility of the foot arch. The differences of measured parameters between each aged group were analyzed by one-way ANOVA. Results The arch volumes when sitting and standing were highly correlated with the navicular height. The navicular height ranged from 15.75 to 27 mm, the arch volume when sitting ranged from 6,223 to 11,630 mm3, and the arch volume when standing from 3,111 to 7,848 mm3 from two to six years of age. The arch volume index showed a declining trend as age increased. Conclusion This study is the first to describe the foot arch with volume perspective in preschool-aged children. The foot arch volume was highly correlated with the navicular height. Research results show both navicular height index and arch volume index gradually increase with age from two to six. At the same time the arch also becomes rigid with age from two to six. These results could be applied for clinical evaluation of the foot arch and post-treatment evaluation.

  15. Double aortic arch and nasogastric tubes: A fatal combination

    Institute of Scientific and Technical Information of China (English)

    Julia Massaad; Kelly Crawford

    2008-01-01

    Double aortic arch is a common form of complete vascular ring that encircles both the trachea and the esophagus, and presents with various respiratory and esophageal symptoms, usually in the pediatric population.We present a case of double aortic arch in an adult patient that manifested as massive upper gastrointestinal bleeding after prolonged nasogastric intubation.

  16. Defect in Posterior Arch of Atlas in Myelomeningocele

    NARCIS (Netherlands)

    G. Blaauw (Gerhard)

    1971-01-01

    textabstractThe posterior arches of the cervical vertebrae of 30 children who died with a myelomeningocele in the lower thoracic, lumbar or sacral region were examined; in 70 per cent of these cases a defect was found in the posterior arch of the atlas, which was bridged by a firm fibrous band. Alté

  17. Level-ARCH Short Rate Models with Regime Switching

    DEFF Research Database (Denmark)

    Christiansen, Charlotte

    This paper introduces regime switching volatility into level- ARCH models for the short rates of the US, the UK, and Germany. Once regime switching and level effects are included there are no gains from including ARCH effects. It is of secondary importance exactly how the regime switching is spec...

  18. Twin - Arch technique. Revival of the "edgewise -Technique"?

    Directory of Open Access Journals (Sweden)

    Jacob Karp

    2012-01-01

    The SNB – Bracket brings a new dimension into the orthodontic world which is most apparent in extraction cases. Its Teflon – like material has a very low friction coefficient thus, reducing the treatment time considerably. Through the use of low dimensioned arch wires, the Twin – Arch Technique becomes a Light – wire system and simultaneously provides good anchorage and torque control.

  19. Adult presentation with vascular ring due to double aortic arch.

    Science.gov (United States)

    Kafka, Henryk; Uebing, Anselm; Mohiaddin, Raad

    2006-11-01

    This is a case report on the use of cardiovascular magnetic resonance imaging to diagnose vascular ring due to double aortic arch in an adult presenting with an abnormal chest X-ray. The experience in this case and the literature review identify the benefits of using cardiovascular magnetic resonance imaging to clarify complex aortic arch anatomy.

  20. Modelling subset multivariate ARCH model via the AIC principle

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    In this paper we consider the problem of identifying a parsimonious subset multivariate ARCH model based on the AIC principle. The proposed approach can reduce the number of parameters in the final ARCH specification and allows for non-constant correlations between the components. Some simulation results illustrate the viability of the proposed procedure.

  1. Full-scale load tests of Pearl-Chain arches

    DEFF Research Database (Denmark)

    Halding, Philip Skov; Hertz, Kristian Dahl; Schmidt, Jacob Wittrup

    2017-01-01

    , pre-fabricated, composite, lightweight, concrete deck elements (SL-Decks), that are post-tensioned together into an arch shape. The two Pearl-Chain arches, each with a span of 13m and a rise of 1m, were placed on a post tensioned bearing plate prepared in advance. The aches are tested with load...

  2. Seismic multi-arch structures in East China

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    In previous papers (Wencai, 2002, 2003), the author has analyzed the deep seismic reflection profiles along some of the Mesozoic plutons in East China, and has pointed out that the crustal structures around these intrusions usually correlate with a special seismic fabric called the seismic multi-arch structure. This paper will continue to show main characteristics of the seismic multi-arch structures and discuss their relationship with mantle-origin magmatism and the lithospheric thinning process. Calibration of seismic reflectors in Chinese continental drilling sites shows that small-scale arch-like reflectors can be generated by fractured eclogites or other plutons, they do not belong to the multi-arch structure specially discussed in the paper. The multi-arch structure is characterized by several arch-like reflectors distributed in both the upper and lower crust with granitoid plutons or stocks exposed on the surface, which do not have obvious negative Europium anomalies. Based on the distribution pattern of arch reflectors, the multi-arch magmatic structures can be divided into three main types, namely the simple vertical combination type, the spread arch magmatic structure and the arch-bouquet structure. All of them correlate to mantle-origin magmatism, but occur in different places. The spread arch magmatic structures occur within a Mesozoic/Cenozoic rift zone with very thin and hot lithosphere. The vertical combination type of the multi-arch structures occurred near the rift zones where lithosphere was thin and hot. The arch-bouquet magmatic structures occur far from the rift zones where the lithosphere is not hot. The continental rifting acted as the late episode of the lithospheric thinning process seeing that the rift zones usually coincide with the thinnest parts of the lithosphere in East China. In different locations within the lithospheric thinning areas, mantle-origin magmatic activities have different characteristics, which might generate different

  3. Atlantoaxial stabilization using multiaxial C-1 posterior arch screws.

    Science.gov (United States)

    Donnellan, Michael B; Sergides, Ioannis G; Sears, William R

    2008-12-01

    The authors present a novel technique of atlantoaxial fixation using multiaxial C-1 posterior arch screws. The technique involves the insertion of bilateral multiaxial C-1 posterior arch screws, which are connected by crosslinked rods to bilateral multiaxial C-2 pars screws. The clinical results are presented in 3 patients in whom anomalies of the vertebral arteries, C-1 lateral masses, and/or posterior arch of C-1 presented difficulty using existing fixation techniques with transarticular screws, C-1 lateral mass screws, or posterior wiring. The C-1 posterior arch screws achieved solid fixation and their insertion appeared to be technically less demanding than that of transarticular or C-1 lateral mass screws. This technique may reduce the risk of complications compared with existing techniques, especially in patients with anatomical variants of the vertebral artery, C-1 lateral masses, or C-1 posterior arch. This technique may prove to be an attractive fixation option in patients with normal anatomy.

  4. Left testicular artery arching over the ipsilateral renal vein

    Institute of Scientific and Technical Information of China (English)

    Munekazu Naito; Hayato Terayama; Yoichi Nakamura; Shogo Hayashi; Takayoshi Miyaki; Masahiro Itoh

    2006-01-01

    Aim: To report two cases of the left testicular artery arching over the left renal vein (LRV) before running downward to the testis. Methods: The subjects were obtained from two Japanese cadavers. During the student course of gross-anatomical dissection, the anatomical relationship between the testicular vessels and the renal vein was specifically observed. Results: The arching left testicular artery arose from the aorta below the LRV and made a loop around the LRV, which appeared to be mildly compressed between the arching artery and the psoas major muscle.Conclusion: Clinically, compression of the LRV between the abdominal aorta and the superior mesenteric artery occasionally induces LRV hypertension, resulting in varicocele, orthostatic protenuria and hematuria. Considering that the incidence of a left arching testicular artery is higher than that of a right one, an arching left artery could be an additional cause of LRV hypertension.

  5. Effect of Obesity on Arch Index in Young Adults

    Directory of Open Access Journals (Sweden)

    Sneha Sameer Ganu

    2013-01-01

    Full Text Available Background: Excessive increases in weight bearing forces caused by obesity may negatively affect the lower limbs and feet but minimal research has examined the long-term loading effects of obesity on the musculoskeletal system, particularly in reference to the feet. Objectives: The purpose of the study was to investigate the effect of obesity on medial longitudinal arch of foot in young adults. Method: 60 subjects, 30 obese & 30 non obese were assessed for height & weight using standard technique. Radiographic images under static condition were used for calculating the arch index. Result: The arch index of obese subjects was significantly lower than the non obese subjects & there is a negative correlation between the BMI & the arch index. Conclusion: These results suggests that obesity lowers the medial longitudinal arch of foot.

  6. 美国第一位头颈外科医师Jacob Da Silva Solis-Cohen

    Institute of Scientific and Technical Information of China (English)

    王荣光

    2010-01-01

    @@ Jacob Da Silva Solis.Cohen(1838~1927)是19世纪末20世纪初杰出的内科和外科医师,他的从医生涯记录了喉科学和头颈外科学的起源与发展. 1838年2月29日Jacob Da Silva Solis-Cohen出生于美国纽约,他的先辈在犹太区非常知名,在北美革命期间是著名的慈善家和爱国者,1840年Solis-Cohen全家移居费城.Solis-Cohen在费城完成了大学教育,随后在Jefferson医学院学习,1860年他在Pennsylvania大学完成医学教育后在费城医院担任了6个月的住院医师.

  7. Hollandi paviljon Hannoveri maailmanäitusel EXPO 2000 : Uus Loodus = Dutch Pavilion at EXPO 2000 in Hannover : New Nature / Winy Maas, Jacob van Rijs, Nathalie de Vries

    Index Scriptorium Estoniae

    Maas, Winy

    2000-01-01

    Hollandi paviljon - näide looduse ja tehnoloogia segunemisest. Projekteerija: MVRDV. Arhitektid Winy Maas, Jacob van Rijs, Nathalie de Vries; kaasa töötasid Stefan Witteman, Jaap van Dijk, Chrisoph Schindler, Kristina Adsersen, Rüdiger Kreiselmayer

  8. Authoritarianism, control and vigilance: Jacob Gorender on the aim of the repression (1940-1980

    Directory of Open Access Journals (Sweden)

    Lucileide Costa Cardoso

    2013-12-01

    Full Text Available The purpose of the article is to demonstrate through analysis of documents of repressive nature, the elements highlighted by the Military Justice to establish the trace of persecution of the intellectuals among other social sectors which dared to challenge the Dictatorship. The complete mapping, involving the combat strategies against the “communism”, including the knowledge of the political parties and their military staff, was accumulated by police and military sectors along the 20th century. We intended to follow, through these records, the political trajectory of the intellectual Jacob Gorender. As a journalist, he got involved in the discussion about the Brazilian participation in the World War II, joined the FEB in 1943. Before that, however, Gorender became a communist, recruited by Mario Alves in 1942. In the early 60’s, he acted as a militant and coordinator of PCB, when he decided to join PCBR, founded in 1968. The historian, in the beginning of the 1964 Strike, with his life already devastated by the Information and Security Community, experienced marginalization, imprisonment, torture and censorship of his writings among other abuses that also reached his closest friends, political companions and family members. The crossing of this amount of information with the memorial documents helps to understand the political repression tricks and the different Revolutionary projects in course.

  9. [The professor and his student. The correspondence between Lorenz Heister and Christoph Jacob Trew].

    Science.gov (United States)

    Ruisinger, Marion Maria; Schnalke, Thomas

    2004-01-01

    Letters were the central medium of communication in the medical scientific community of the 18th century. Professional as well as personal relationships were established among the various correspondents. These relationships constituted the smallest units of communication which contributed to the regional and international scientific network of the Republic of Letters. A correspondence that grew out of a trusted teacher-student relationship could gain an especially intense character both intellectually and personally. This contribution offers an analysis of an example of just such a correspondence. Lorenz Heister (1683--1758), medical professor at the universities of Altdorf and Helmstedt, and his disciple, Christoph Jacob Trew (1695--1769), who became a renowned physician and natural scientist in Nuremberg, communicated in letters to one another over a span of almost forty years. Their correspondence started as a rather asymmetrical dialogue. Over time, however, Heister and Trew came to meet as equals in almost every field of their competence. Their letters reveal a broad spectrum of scientific, organisational, professional, medical and personal issues which formed the basis of a stable and lasting learned correspondence in the age of Enlightenment.

  10. Did the Pietists become esotericists when they read the works of Jacob Boehme?

    Directory of Open Access Journals (Sweden)

    Tomas Mansikka

    2008-01-01

    Full Text Available As is commonly known, Jacob Boehme (1575–1624 is, and has been ever since his emergence, difficult to place in the history of thought. He has, for instance, been characterized as ‘the most religious of philosophers’. As such Boehme could be seen to be on a borderline somewhere between philosophy and theology. From a reverse point of view, however, he could also be termed the most speculative of the religiously minded, as a deeply religious thinker or mystic. His influence is also shown in both fields; not only was he to play an important role within German philosophy during the Romantic era, but also, within the Pietist movement, or the movement for re­vival of piety within the Lutheran church. Focusing on the Pietist movement, initiated by Philipp Jakob Spener (1635–1705 in the late seventeenth century and its spread on Finnish ground, the author of this article shows that where Boehmian influence is traceable, it reached quite different environments depending on the movement’s leaders or followers. Also some light is shed on the controversy between Lutheran orthodoxy and Pietism in early eighteenth century Finland.

  11. Description of dental arch form using the Fourier series.

    Science.gov (United States)

    Valenzuela, A Patricia; Pardo, Marco A; Yezioro, Salomon

    2002-01-01

    The aim of this study was to describe the form of the human superior dental arch using Fourier transformations. Forty models made in dental stone from impressions of the maxillary dental arch were used to obtain the reference data, which were expressed in Cartesian coordinates, from the mesovestibular cuspid vertices of molar teeth, vestibular cuspid of premolars, and incisal edge. Fourth-grade equations and Fourier series were calculated from these data. The results indicate that Fourier series more precisely express the form and size of different dental arches, with mixed or permanent dentition, than fourth-grade equations. Details of the mathematical procedure and the precision obtained were provided.

  12. Diffusion in the presence of cylindrical obstacles arranged in a square lattice analyzed with generalized Fick-Jacobs equation

    Science.gov (United States)

    Dagdug, Leonardo; Vazquez, Marco-Vinicio; Berezhkovskii, Alexander M.; Zitserman, Vladimir Yu.; Bezrukov, Sergey M.

    2012-05-01

    The generalized Fick-Jacobs equation is widely used to study diffusion of Brownian particles in three-dimensional tubes and quasi-two-dimensional channels of varying constraint geometry. We show how this equation can be applied to study the slowdown of unconstrained diffusion in the presence of obstacles. Specifically, we study diffusion of a point Brownian particle in the presence of identical cylindrical obstacles arranged in a square lattice. The focus is on the effective diffusion coefficient of the particle in the plane perpendicular to the cylinder axes, as a function of the cylinder radii. As radii vary from zero to one half of the lattice period, the effective diffusion coefficient decreases from its value in the obstacle free space to zero. Using different versions of the generalized Fick-Jacobs equation, we derive simple approximate formulas, which give the effective diffusion coefficient as a function of the cylinder radii, and compare their predictions with the values of the effective diffusion coefficient obtained from Brownian dynamics simulations. We find that both Reguera-Rubi and Kalinay-Percus versions of the generalized Fick-Jacobs equation lead to quite accurate predictions of the effective diffusion coefficient (with maximum relative errors below 4% and 7%, respectively) over the entire range of the cylinder radii from zero to one half of the lattice period.

  13. "Groβes zärtliches Brasilien": Das Brasilienbild in den Werken von Heinrich Eduard Jacob

    Directory of Open Access Journals (Sweden)

    Marlen Eckl

    2009-12-01

    Full Text Available Embora tendo viajado pelo Brasil em 1932 e depois escrito vários artigos sobre essa viagem assim como três livros de temática brasileira, Heinrich Eduard Jacob é quase desconhecido em Brasil. Por isso neste artigo são apresentados a trajetória do jornalista e escritor e as suas obras brasileiras Treibhaus Südamerika (1934, Saga e marcha triunfal do café (1934 e Estrangeiro. Einwandererschicksal in Brasilien (1951. Ademais Jacob será contextualizado atraves da conecção com os outros autores que, nos anos 30 e 40, escreveram sobre o país. Estes, na maioria, foram refugiados do nazismo como entre outros Stefan Zweig, Richard Katz, Wolfgang Hoffmann-Harnisch, Frank Arnau e Marte Brill. Quanto ao imaginário acerca do Brasil descrito por Jacob percebe-se que ele como tantos outros autores também viu no Brasil um "país de um futuro" (como o chamou e uma "democracia racial" pretensa existente no país. Apesar disso, não desistiu de desmascarar a cordialidade brasileira proverbial como sendo apenas disfarce e de indicar problemas existentes como a questão da política quanto ao café e as consequencias negativas do nacionalismo, fomentado pelo regime Vargas. Assim ele defendeu um ponto de vista que foi contrário àquele do seu amigo Stefan Zweig.

  14. "[No] doctor but my master": Health reform and antislavery rhetoric in Harriet Jacobs's Incidents in the life of a slave girl.

    Science.gov (United States)

    Berry, Sarah L

    2014-03-01

    This essay examines Harriet Jacobs's Incidents in the Life of a Slave Girl (1861) in light of new archival findings on the medical practices of Dr. James Norcom (Dr. Flint in the narrative). While critics have sharply defined the feminist politics of Jacobs's sexual victimization and resistance, they have overlooked her medical experience in slavery and her participation in reform after escape. I argue that Jacobs uses the rhetoric of a woman-led health reform movement underway during the 1850s to persuade her readers to end slavery. This essay reconstructs both contexts, revealing that Jacobs links enslaved women's physical and sexual vulnerability with her female readers' fears of male doctors' threats to modesty and of their standard bleed-and-purge treatments. Jacobs illustrates that slavery damages women's health as much as heroic medicine, and thus merits the political activism of her readers. Specifically, Jacobs dramatizes her conflicts with the rapacious physician-master at moments that are crucial to women's health: marriage, pregnancy, childbirth, and motherhood. Ultimately, this essay advances a new understanding of the role of health reform in social change: it galvanized other movements such as women's rights and abolition, particularly around issues of bodily autonomy for women and African Americans.

  15. The assessment of crowding without the need to record arch perimeter. Part I: Arches with acceptable alignment.

    Science.gov (United States)

    Battagel, J M

    1996-05-01

    A simplified, mathematically determined technique for calculating arch perimeter (the overlap method) is described and its validity in determining an accurate assessment of crowding is tested. Indices, expressed in millimetres of crowding or spacing, were computed for both the whole arch and the labial segment alone. Study casts of 36 individuals with clinically acceptable lower arches were used to validate the method. The degree of crowding or spacing calculated was compared with a "clinical' assessment of each arch, in which the irregularity was measured directly using a steel ruler. Various calculation schemes were tested. Depending on exactly how the overlap was determined, the results varied slightly. Although the arches showed acceptable alignment, it was preferable to include a strategy for normalizing the positions of any rotated teeth before the overlaps were calculated. Repositioning any bucco-lingually displaced teeth into the line of the arch, however, was not useful. For the complete arch good agreement with the clinical assessment was reached on 31 occasions and for the labial segment, all but one appraisals were within 0.5 mm of each other. In the remaining instances (five complete arches and one labial segment), the degree of crowding or spacing was between 0.5 and 1 mm of the clinical assessment. Considering that clinical measurement of minor degrees of crowding and spacing cannot be precise, these results were considered acceptable. The method was easy to use, relying only on the recording of mesio-distal tooth widths and was acceptably reproducible. The technique would therefore appear to provide a valid yet simple research tool with which to record the degree of crowding. Its ability to cope with irregular and crowded arches will be the subject of a subsequent review.

  16. A comparative study of inter-abutment distance of dies made from full arch dual-arch impression trays with those made from full arch stock trays: An in vitro study

    Directory of Open Access Journals (Sweden)

    Reddy Jagan

    2009-01-01

    Full Text Available Objectives: The dual-arch impression technique is convenient in that it makes the required maxillary and mandibular impressions, as well as the inter-occlusal record in one procedure. The accuracy of inter-abutment distance in dies fabricated from dual-arch impression technique remains in question because there is little information available in the literature. Materials and Methods: This study was conducted to evaluate the accuracy of inter-abutment distance in dies obtained from full arch dual-arch trays with those obtained from full arch stock metal trays. Results and Conclusion: The metal dual-arch trays showed better accuracy followed by the plastic dual-arch and stock dentulous trays, respectively, though statistically insignificant. The pouring sequence did not have any effect on the inter-abutment distance statistically, though pouring the non-working side of the dual-arch impression first showed better accuracy.

  17. A case of neonatal arterial thrombosis mimicking interrupted aortic arch.

    Science.gov (United States)

    Gürsu, Hazım Alper; Varan, Birgül; Oktay, Ayla; Özkan, Murat

    2015-06-01

    Neonatal arterial thrombosis is a very rare entity with clinical findings resembling coarctation of aorta or interrupted aortic arch. A two day-old male newborn was admitted to a different hospital with difficulty in sucking and sleepiness. On echocardiographic examination, a diagnosis of interrupted aortic arch was made and he was treated with prostoglandin E2. When the patient presented to our center, physical examination revealed that his feet were bilaterally cold. The pulses were not palpable and there were ecchymotic regions in the lower extremities. Echocardiography ruled out interrupted aortic arch. Computerized tomographic angiography revealed a large thrombosis and total occlusion of the abdominal aorta. Since there was no response to treatment with tissue plasminogen activator, we performed thrombectomy. Homozygous Factor V Leiden and Methylenetetrahydrofolate reductase mutations were found in this patient. Neonatal aortic thrombosis which is observed very rarely and fatal should be considered in the differential diagnosis of coarctation of aorta and interrupted aortic arch.

  18. Nonstationary ARCH and GARCH with t-distributed Innovations

    DEFF Research Database (Denmark)

    Pedersen, Rasmus Søndergaard; Rahbek, Anders

    Consistency and asymptotic normality are established for the maximum likelihood estimators in the nonstationary ARCH and GARCH models with general t-distributed innovations. The results hold for joint estimation of (G)ARCH effects and the degrees of freedom parameter parametrizing the t-distribut......Consistency and asymptotic normality are established for the maximum likelihood estimators in the nonstationary ARCH and GARCH models with general t-distributed innovations. The results hold for joint estimation of (G)ARCH effects and the degrees of freedom parameter parametrizing the t......-distribution. With T denoting sample size, classic square-root T-convergence is shown to hold with closed form expressions for the multivariate covariances....

  19. Clarifying the anatomy of the fifth arch artery

    Directory of Open Access Journals (Sweden)

    Saurabh Kumar Gupta

    2016-01-01

    Full Text Available The artery allegedly forming in the fifth pharyngeal arch has increasingly been implicated as responsible for various vascular malformations in patients with congenitally malformed hearts. Observations from studies on developing embryos, however, have failed to provide support to substantiate several of these inferences such that the very existence of the fifth arch artery remains debatable. To the best of our knowledge, in only a solitary human embryo has a vascular channel been found that truly resembled the artery of the fifth arch. Despite the meager evidence to support its existence, the fifth arch artery has been invoked to explain the morphogenesis of double-barreled aorta, some unusual forms of aortopulmonary communications, and abnormalities of the brachiocephalic arteries. In most of these instances, the interpretations have proved fallible when examined in the light of existing knowledge of cardiac development. In our opinion, there are more plausible alternative explanations for the majority of these descriptions. Double-barreled aorta is more likely to result from retention of the recently identified dorsal collateral channels while abnormalities of brachiocephalic arteries are better explained on the basis of extensive remodeling of aortic arches during fetal development. Some examples of aortopulmonary communications, nonetheless, may well represent persistence of the developing artery of the fifth pharyngeal arch. We here present one such case - a patient with tetralogy of Fallot and pulmonary atresia, in whom the fifth arch artery provided a necessary communication between the ascending aorta and the pulmonary arteries. In this light, we discuss the features we consider to be essential before attaching the tag of "fifth arch artery" to a candidate vascular channel.

  20. Retrograde cerebral perfusion (RCP) in aortic arch surgery: efficacy and possible mechanisms of brain protection.

    Science.gov (United States)

    Bavaria, J E; Pochettino, A

    1997-07-01

    Retrograde cerebral perfusion (RCP) was first introduced to treat air embolism during cardiopulmonary bypass (CPB). Its use was reintroduced to extend the safety of hypothermic circulatory arrest (HCA) during operations involving an open aortic arch. RCP seems to prevent cerebral rewarming during HCA. Both clinical and animal data suggest that RCP provides between 10% and 30% of baseline cerebral blood flow when administered through the superior vena cava (SVC) at jugular pressures of 20 to 25 mm Hg. RCP flows producing jugular venous pressures higher than 30 mm Hg may cause cerebral edema. Cerebral blood flow generated by RCP is able to sustain some cerebral metabolic activity, yet is not able to fully meet cerebral energy demands even at temperatures of 12 degrees to 18 degrees C. RCP may further prevent embolic events during aortic arch surgery when administered at moderate jugular vein pressures (RCP, when applied during aortic arch reconstruction, may extend the safe HCA period and improve morbidity and mortality, especially when HCA times are more than 60 minutes. RCP applied in patients and severe carotid and brachiocephalic occlusive disease may be ineffective, and caution is in order when RCP times are greater than 90 minutes.

  1. Comparison of arch forms between Turkish and North American

    Directory of Open Access Journals (Sweden)

    Ahmet A. Celebi

    2016-04-01

    Full Text Available ABSTRACT Objective: The aim of this study was to clarify the morphological differences in the mandibular arches of Turkish and North American white subjects. Methods: The sample included 132 Turkish (34 Class I, 58 Class II, and 40 Class III and 160 North American (60 Class I, 50 Class II, and 50 Class III subjects. The most facial portion of 13 proximal contact areas was digitized from photocopied images of patients' mandibular dental arches. Clinical bracket points were calculated for each tooth based on mandibular tooth thickness data. Four linear and two proportional measurements were taken. The subjects were grouped according to arch form types (tapered, ovoid and square in order to have frequency distribution compared between ethnic groups in each Angle classification. Results: The Turkish group showed significantly lower molar depth and more significant molar width-depth (W/D ratio in all three Angle classifications. On the other hand, the Turkish group also showed a significantly larger intercanine width in Class III malocclusion and intermolar width in Class II malocclusion. The most frequent arch forms seen were the ovoid arch form in the Turkish group and the tapered form in the white group. Conclusions: Our results demonstrate that when treating Turkish patients, one should expect to use preformed ovoid arch form orthodontic wires in a significant percentage of patients.

  2. Comparison of arch forms between Turkish and North American

    Science.gov (United States)

    Celebi, Ahmet A.; Keklik, Hakan; Tan, Enes; Ucar, Faruk I.

    2016-01-01

    ABSTRACT Objective: The aim of this study was to clarify the morphological differences in the mandibular arches of Turkish and North American white subjects. Methods: The sample included 132 Turkish (34 Class I, 58 Class II, and 40 Class III) and 160 North American (60 Class I, 50 Class II, and 50 Class III) subjects. The most facial portion of 13 proximal contact areas was digitized from photocopied images of patients' mandibular dental arches. Clinical bracket points were calculated for each tooth based on mandibular tooth thickness data. Four linear and two proportional measurements were taken. The subjects were grouped according to arch form types (tapered, ovoid and square) in order to have frequency distribution compared between ethnic groups in each Angle classification. Results: The Turkish group showed significantly lower molar depth and more significant molar width-depth (W/D) ratio in all three Angle classifications. On the other hand, the Turkish group also showed a significantly larger intercanine width in Class III malocclusion and intermolar width in Class II malocclusion. The most frequent arch forms seen were the ovoid arch form in the Turkish group and the tapered form in the white group. Conclusions: Our results demonstrate that when treating Turkish patients, one should expect to use preformed ovoid arch form orthodontic wires in a significant percentage of patients. PMID:27275615

  3. The correlation study on arch type with physical fitness, body fat and heath-carter somatotype

    Institute of Scientific and Technical Information of China (English)

    Wang Lei; Yin Shuai; Sui Yuelin; Liu Yuanyuan; Ding Wenfeng

    2015-01-01

    Objective: To explore the relationship between the arch type and physical form, physical fit-ness, body fat and somatotype. Methods:Measure and type the arch of 382 male soldier in a certain army by foot-print ratio method; Routinely detect the results of height and weight, body fat, 100 and 5 000 meters running, standing jump;According to the international heath-carter method, ten indexes were measured and the somatotype were evaluated. Results:①382 samples, flatfoot 91, accounted for 23. 6%, the foot arch index 0. 60 + 0. 21;non-flatfoot 291 , 76 . 2%, arch index 1 . 14 +0 . 22 , t=22 . 83 , P=0 . 001;②Comparing the mean of the results of height, weight, BMI, body fat percentage,100 and 5 000 meters running, standing jump of the two groups( flatfoot and non-flatfoot) samples, t-text, P>0. 05; ③Assessed by the method of heath-carter shape, flatfoot group so-matotype mean is 2. 7 (0. 7) -4. 8 (1. 3) -2. 7 (0. 9), sam is 1. 5 (0. 9);non flatfoot group somatotype mean is 2. 3 (0. 7) -5. 0 (3. 1) -2. 4 (0. 9), sam is 1. 6 (1. 0);The distance of two groups`points in 3D space mean somatotypes is 0. 54; t-test of the two groups`somatotype mean, P>0. 05. Conclusions: Compared the flatfoot group with the control group, there is no significant difference in physical form, physical fitness, body fat and so-matotype. The increasingly high rate of flatfoot in healthy people is physical, but not flatfoot disease, and no need for surgery.

  4. Elastic responses of underground circular arches considering dynamic soil-structure interaction: A theoretical analysis

    Science.gov (United States)

    Chen, Hai-Long; Jin, Feng-Nian; Fan, Hua-Lin

    2013-02-01

    Due to the wide applications of arches in underground protective structures, dynamic analysis of circular arches including soil-structure interactions is important. In this paper, an exact solution of the forced vibration of circular arches subjected to subsurface denotation forces is obtained. The dynamic soil-structure interaction is considered with the introduction of an interfacial damping between the structure element and the surrounding soil into the equation of motion. By neglecting the influences of shear, rotary inertia and tangential forces and assuming the arch incompressible, the equations of motion of the buried arches were set up. Analytical solutions of the dynamic responses of the protective arches were deduced by means of modal superposition. Arches with different opening angles, acoustic impedances and rise-span ratios were analyzed to discuss their influences on an arch. The theoretical analysis suggests blast loads for elastic designs and predicts the potential failure modes for buried protective arches.

  5. [Relationship between aortic arch shape and blood pressure response after coarctation repair].

    Science.gov (United States)

    Ou, P; Mousseaux, E; Auriacombe, L; Pédroni, E; Balleux, F; Sidi, D; Bonnet, D

    2005-01-01

    The mechanisms of secondary hypertension after repair of coarctation of the aorta are not well understood. Abnormalities of the architecture of the aortic arch and their consequences on blood pressure have not been studied. In order to study the relationship between abnormalities or aortic arch architecture and resting blood pressure ninety-four patients without re-coarctation were followed up prospectively from 1997 to 2004 (mean age 16.9 +/- 8.1 years; mean weight 57.5 +/- 18.3 Kg; interval since surgery 16.3 +/- 5.4 years). All underwent MRI angiography of the thoracic aorta which enabled the abnormalities to be classified in 3 groups: gothic arch, crenellated arch and roman arch. Twenty-four patients (25.5%) were hypertensive and 70 (74.4%) normotensive. There were 40 gothic arches (42.5%). 14 crenellated arches (15%) and 40 roman arches (42.5%). Gothic arches were more commonly observed in the hypertensive patients (18/40, [45%, 95% CI 31-62]) than the crenellated arches (4/14, [28.5%, 95% CI 7-48]) or the roman arches (2/40, [5%, 95% CI 2-12]). Only the gothic arch was independently correlated with hypertension on multivariate analysis. The authors conclude that gothic deformation of the aortic arch is an independent predictive factor of hypertension in patients operated for coarctation with an excellent result on the isthmic region. Patients with a gothic appearance of their aortic arch should be followed up closely.

  6. Characterization of the cephalic arch and location of stenosis

    Science.gov (United States)

    Bennett, Shelby; Hammes, Mary S.; Blicharski, Tom; Watson, Sydeaka; Funaki, Brian

    2015-01-01

    Purpose The purpose of this study is to accurately characterize the cephalic arch segments into four domains and to enable more specific evaluation of cephalic arch stenosis (CAS) and determine the frequency of stenosis in each domain. Methods After Institutional Review Board (IRB) approval, a retrospective chart review was done to define a population of patients receiving hemodialysis who developed CAS as apparent on clinically indicated radiologic imaging. A standardized approach was devised to categorize four domains of the cephalic arch. Domain I was defined as the peripheral portion of the arch and Domain IV was the distal portion of the cephalic vein near termination with the axillary vein. The magnitude of stenosis as measured by percentage was determined and compared in the four domains. Results The most frequent location for stenosis was found in domain IV when compared with domains II or I (p<0.01). The magnitude of stenosis differed across all domains (p<0.001) with the least common place for CAS in domain I. Treatment of CAS included angioplasty in all, thrombectomy in eight, and stent placement in five. Conclusions CAS occurs most commonly in the terminal portion of the arch. Four standardized domains have been defined; future work will validate these findings and determine the best intervention for each domain. PMID:25198819

  7. Three-dimensional stiffness of the carpal arch.

    Science.gov (United States)

    Gabra, Joseph N; Li, Zong-Ming

    2016-01-01

    The carpal arch of the wrist is formed by irregularly shaped carpal bones interconnected by numerous ligaments, resulting in complex structural mechanics. The purpose of this study was to determine the three-dimensional stiffness characteristics of the carpal arch using displacement perturbations. It was hypothesized that the carpal arch would exhibit an anisotropic stiffness behavior with principal directions that are oblique to the conventional anatomical axes. Eight (n=8) cadavers were used in this study. For each specimen, the hamate was fixed to a custom stationary apparatus. An instrumented robot arm applied three-dimensional displacement perturbations to the ridge of trapezium and corresponding reaction forces were collected. The displacement-force data were used to determine a three-dimensional stiffness matrix using least squares fitting. Eigendecomposition of the stiffness matrix was used to identify the magnitudes and directions of the principal stiffness components. The carpal arch structure exhibited anisotropic stiffness behaviors with a maximum principal stiffness of 16.4±4.6N/mm that was significantly larger than the other principal components of 3.1±0.9 and 2.6±0.5N/mm (pcarpal tunnel which is accounted for by the stiff transverse ligaments that tightly bind distal carpal arch. The minimal principal stiffness is attributed to the less constraining articulation between the trapezium and scaphoid. This study provides advanced characterization of the wrist׳s three-dimensional structural stiffness for improved insight into wrist biomechanics, stability, and function.

  8. Classification of the height and flexibility of the medial longitudinal arch of the foot

    DEFF Research Database (Denmark)

    Nilsson, Mettte Kjaergaard; Friis, Rikke; Michaelsen, Maria Skjoldahl

    2012-01-01

    BACKGROUND: The risk of developing injuries during standing work may vary between persons with different foot types. High arched and low arched feet, as well as rigid and flexible feet, are considered to have different injury profiles, while those with normal arches may sustain fewer injuries......-off values presented in this study can be used to categorize people performing standing work into groups of different foot arch types. The results of this study are important for investigating a possible link between arch height and arch movement and the development of injuries....

  9. Game model of safety monitoring for arch dam deformation

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Arch dam deformation is comprehensively affected by water pressure,temperature,dam’s structural behavior and material properties as well as other factors.Among them the water pressure and temperature are external factors(source factors) that cause dam deformation,and dam’s structural behavior and material properties are the internal factors of deformation(resistance factors).The dam deformation is the result of the mutual game playing between source factors and resistance factors.Therefore,resistance factors of structure and materials that reflect resistance character of arch dam structure are introduced into the traditional model,where structure factor is embodied by the flexibility coefficient of dam body and the maximum dam height,and material property is embodied by the elastic modulus of dam.On the basis of analyzing the correlation between dam deformation and resistance factors,the game model of safety monitoring for arch dam deformation is put forward.

  10. In-Plane MEMS Shallow Arch Beam for Mechanical Memory

    Directory of Open Access Journals (Sweden)

    Md Abdullah Al Hafiz

    2016-10-01

    Full Text Available We demonstrate a memory device based on the nonlinear dynamics of an in-plane microelectromechanical systems (MEMS clamped–clamped beam resonator, which is deliberately fabricated as a shallow arch. The arch beam is made of silicon, and is electrostatically actuated. The concept relies on the inherent quadratic nonlinearity originating from the arch curvature, which results in a softening behavior that creates hysteresis and co-existing states of motion. Since it is independent of the electrostatic force, this nonlinearity gives more flexibility in the operating conditions and allows for lower actuation voltages. Experimental results are generated through electrical characterization setup. Results are shown demonstrating the switching between the two vibrational states with the change of the direct current (DC bias voltage, thereby proving the memory concept.

  11. LANGER’S AXILLARY ARCH AND ITS CLINICAL IMPLICATIONS

    Directory of Open Access Journals (Sweden)

    Jyothi K C

    2014-09-01

    Full Text Available Introduction: The axillary arch muscle of Langer is the most common anatomical variant of axillary musculature which is of clinical and surgical importance. It may lead to neurovascular compression syndrome in the cervicoaxillary region and can be misinterpreted while examining axilla and also impairs movements of shoulder joint. Observation: During routine dissection of axilla for undergraduate teaching, an unusual muscular slip in the left axilla was observed .The muscular slip was extending from lattisimus dorsi muscle to undersurface of pectoralis major muscle, arching over axillary vessels and cords of brachial plexus. Conclusion: The axillary arch may cause obstruction to axillary vessels and nerves and may be involved in thoracic outlet syndrome and shoulder instability. The knowledge of this muscular variant could help to minimize intraoperative complications related to surgeries in or nearby axilla such as mastectomy, breast reconstruction and axillary lymphadenectomy or lymph node biopsy.

  12. In-Plane MEMS Shallow Arch Beam for Mechanical Memory

    KAUST Repository

    Hafiz, Md Abdullah Al

    2016-10-18

    We demonstrate a memory device based on the nonlinear dynamics of an in-plane microelectromechanical systems (MEMS) clamped–clamped beam resonator, which is deliberately fabricated as a shallow arch. The arch beam is made of silicon, and is electrostatically actuated. The concept relies on the inherent quadratic nonlinearity originating from the arch curvature, which results in a softening behavior that creates hysteresis and co-existing states of motion. Since it is independent of the electrostatic force, this nonlinearity gives more flexibility in the operating conditions and allows for lower actuation voltages. Experimental results are generated through electrical characterization setup. Results are shown demonstrating the switching between the two vibrational states with the change of the direct current (DC) bias voltage, thereby proving the memory concept.

  13. Management of hypoplastic aortic arch associated with neonatal coarctation.

    Science.gov (United States)

    Caspi, J; Ilbawi, M N; Muster, A; Roberson, D; Arcilla, R

    1994-12-01

    Controversy still exists as to whether hypoplastic aortic arch frequently associated with neonatal coarctation, should be enlarged at the time of coarctation repair. To determine the indications for and the outcome of repair of hypoplastic aortic arch, pre- and postoperative angiograms/echocardigraphy of 77 cases with isolated (n = 25, Group 1) or complex (n = 52, Group 2) neonatal coarctation operated upon between 1/80 and 12/89 were reviewed. Age was 5-14 days (mean 8 +/- 1.6). Aortic arch/ascending aorta diameter ratio (AR/AA) as a measure of the degree of aortic arch hypoplasia was 0.39-0.64 (0.52 +/- 0.04) in isolated and 0.15-0.47 (0.34 +/- 0.06) in complex coarctation (p < 0.05). Left subclavian flap aortoplasty was used in 72 patients; alone in 25, in combination with pulmonary artery banding in 43 patients, and simultaneously with intracardiac repair in 4 patients. Extensive reconstruction of aortic arch and coarctation with synthetic patch was performed in the remaining 5 patients (AR/AO = 0.16 +/- 0.03) using cardiopulmonary by-pass at the time of intracardiac repair. Operative mortality was 2/76 (2.5%). Follow-up is 6.6 +/- 1.4 years. Recoarctation occurred in 3 patients (4%). AR/AA increased to 0.86 +/- 0.1 in isolated (p < 0.05 vs preoperative) and to 0.7 +/- 0.1 in complex coarctation (p < 0.05 vs preoperative). In the majority of cases, hypoplastic aortic arch associated with coarctation grows satisfactorily following simple repair of coarctation with no significant residual narrowing.(ABSTRACT TRUNCATED AT 250 WORDS)

  14. Optical silencing of C. elegans cells with arch proton pump.

    Directory of Open Access Journals (Sweden)

    Ayako Okazaki

    Full Text Available BACKGROUND: Optogenetic techniques using light-driven ion channels or ion pumps for controlling excitable cells have greatly facilitated the investigation of nervous systems in vivo. A model organism, C. elegans, with its small transparent body and well-characterized neural circuits, is especially suitable for optogenetic analyses. METHODOLOGY/PRINCIPAL FINDINGS: We describe the application of archaerhodopsin-3 (Arch, a recently reported optical neuronal silencer, to C. elegans. Arch::GFP expressed either in all neurons or body wall muscles of the entire body by means of transgenes were localized, at least partially, to the cell membrane without adverse effects, and caused locomotory paralysis of worms when illuminated by green light (550 nm. Pan-neuronal expression of Arch endowed worms with quick and sustained responsiveness to such light. Worms reliably responded to repeated periods of illumination and non-illumination, and remained paralyzed under continuous illumination for 30 seconds. Worms expressing Arch in different subsets of motor neurons exhibited distinct defects in the locomotory behavior under green light: selective silencing of A-type motor neurons affected backward movement while silencing of B-type motor neurons affected forward movement more severely. Our experiments using a heat-shock-mediated induction system also indicate that Arch becomes fully functional only 12 hours after induction and remains functional for more than 24 hour. CONCLUSIONS/SGNIFICANCE: Arch can be used for silencing neurons and muscles, and may be a useful alternative to currently widely used halorhodopsin (NpHR in optogenetic studies of C. elegans.

  15. Pumping tests in heterogeneous aquifers: An analytical study of what can be obtained from their interpretation using Jacob's Method

    Science.gov (United States)

    SáNchez-Vila, Xavier; Meier, Peter M.; Carrera, Jesús

    1999-04-01

    Interpretation of pumping tests to estimate hydraulic parameter values is typically based on the assumption of aquifer homogeneity. The applicability of the traditional methods of interpretation in real aquifers can be questioned, since the evaluation of the drawdown curves observed at different locations in a single test may not result in one consistent set of hydraulic parameters. Thus most hydrogeologists tend to look at estimated transmissivities (T) as some average property of the medium, while estimated storativities (S) are disregarded in some cases, particularly when they are obtained from data measured at the pumping well. An analytical study of drawdown under radially convergent flow toward a single point in heterogeneous aquifers shows that large time drawdown values form a straight line on a drawdown versus log time plot. Jacob's method consists of obtaining estimates for T and S from the slope and intercept of this line. We find that even in a heterogeneous field, these estimates provide valuable information about the aquifer. Estimated T values for different observation points tend to converge to a single value, which corresponds to the effective T derived under parallel flow conditions. Estimated storativities, however, display higher variability, but the geometric mean of the Sest values can be used as an unbiased estimator of the actual S. Thus it appears that although Jacob's method was originally derived for homogeneous media, it can provide valuable information in real aquifers.

  16. Planning and Analysis of an Arched Indoor Stadium

    Directory of Open Access Journals (Sweden)

    Alice T V

    2014-04-01

    Full Text Available This paper deals with planning and designing of a multilevel indoor stadium with hanging table tennis court and Olympic standard swimming pool. In order to support the large span the stadium is designed as an arched structure. The materials for the construction are chosen so as to have a minimum carbon di-oxide foot print. Static and earthquake analysis were done by using STAAD.Pro V8i. The paper also does a comparison between arched structure and plane frame structure.

  17. Full-arch milled titanium implant bridge: technical report.

    Science.gov (United States)

    Peché, Wendy-Ann; Van Vuuren, Ludwig Jansen; Park, Chae

    2011-09-01

    The manufacturing of full-arch fixed implant-supported bridges with the use of the traditional lost wax technique remains a technical challenge. Distortion of the alloy during casting and subsequent heating cycles during porcelain build-up causes numerous problems. Fracturing of porcelain on large restorations is difficult and costly to restore. The fitting problems can be eliminated by utilising CAD/CAM technology in the manufacturing of long-span or full-arch titanium bridges. Repair of damaged porcelain can be simplified with the use of discrete, individually-removable crowns on the bridge.

  18. Aneurysm of the superficial palmar arch: a case report.

    Science.gov (United States)

    Estrella, Emmanuel P; Lee, Ellen Y

    2008-01-01

    Aneurysms of the hand are uncommon lesions. The most common location is the ulnar artery. We present a case of a young female who consulted us for a hand mass with a history of trauma to the hand. Pre-operative arteriogram showed a superficial palmar arch aneurysm. The mass was excised and the arch was reconstructed using a reversed Y-shaped vein graft. Fourteen months after surgery, there was no recurrence of the aneurysm and the patient only reported occasional cold intolerance.

  19. Numerical study of free-fall arches in hopper flows

    Science.gov (United States)

    Lin, P.; Zhang, S.; Qi, J.; Xing, Y. M.; Yang, L.

    2015-01-01

    Beverloo's law describes the flow rate of grains discharging from hoppers, where the assumption of a free-fall arch (FFA) is very useful in understanding the physical picture of this process. The FFA has been observed in previous experiments but a clear systematic study of the FFA is still necessary. In this paper, dense granular flow in hoppers was studied by numerical simulations, in attempts to explore the free-fall region and its boundary. Generally, the numerical simulation results support the free-fall arch assumption, although the statistical description of the FFA is not exactly equivalent to its strict definition.

  20. Duplo arco aórtico: a quebra do silêncio Double aortic arch: the break of silence

    Directory of Open Access Journals (Sweden)

    Ana Rita Abrão

    2011-03-01

    Full Text Available Anéis vasculares representam 1-2% dos casos das cardiopatias congênitas. Relatamos um caso raro de duplo arco aórtico. Mulher, 60 anos, procurou atendimento na clínica médica apresentando 1 ano de história de disfagia, 6 meses de dispneia e 2 meses de dor torácica esporádica. Raio X de tórax revelou: hiperinsuflação pulmonar difusa, alargamento mediastinal, coração com volume e configurações normais, arco aórtico à direita e alterações degenerativas vertebrais. Tomografia computadorizada do tórax: arco aórtico duplo circundando e comprimindo a traqueia e o esôfago. Arco direito mais calibroso, emergindo dele o tronco braquiocefálico. Do arco esquerdo emergem a artéria carótida comum e a subclávia esquerda. Diagnóstico: anel vascular traqueoesofagiano decorrente do duplo arco aórtico, sendo o arco direito dominante. No presente caso, optou-se por seguimento clínico da paciente, levando-se em conta a intensidade dos sintomas apresentados.Vascular rings represent 1 to 2% of cases of congenital heart disease. We report a rare case of double aortic arch. A 60-year-old woman was admitted to the hospital presenting a one-year history of dysphagia, six months of dyspnea and two months of sporadic chest pain. Radiograph of the chest revealed diffuse pulmonary hyper inflation, widening of the mediastinum, heart of normal size and shape, a right-sized aortic arch, and degenerative changes of the thoracic spine. Computed tomography of the chest showed a double aortic arch encircling and compressing the trachea and the esophagus. The right aortic arch had a larger caliber, with brachiocephalic trunk arising from it. The left common carotid artery and the left subclavian artery arose from the left aortic arch. Diagnosis: tracheoesophageal vascular ring due to double aortic arch, with dominant right arch. In this case, we chose to follow the patient medically, taking into consideration the mildness of the symptoms.

  1. Influence of space of double row piles on soil arching effect

    Directory of Open Access Journals (Sweden)

    Zhao bo

    2015-02-01

    Full Text Available FLAC3d software, based on continuous theory, is used to analysis influence of space of double row piles on soil arching effect. The result shows that different from single row pile, double row piles will produce soil arching effect at front pile and rear pile severally, this phenomenon is called multiple soil arching effect; the residual load of front of front row pile will increase,the soil arch zone and the soil arching effect will decrease with the continuous increase of double row pile spacing.At the same time the soil arching effect of rear pile decreases, while the soil arching effect of front pile increases and finally the soil arching effect between front pile and rear pile will be equal.

  2. The surgical importance of an axillary arch in sentinel node biopsy.

    LENUS (Irish Health Repository)

    Ridgway, P F

    2011-03-01

    When Carl Langer described the aberrant axillary arch in 1846 its relevance in sentinel node biopsy (SNB) surgery could not have been contemplated. The authors define an incidence and elucidate relevance of the arch in SNB of the axilla.

  3. Visualization of soil arching in flexible piled embankments

    Indian Academy of Sciences (India)

    Tuğba Eskışar

    2015-10-01

    Piled embankments rely on soil arching, but, when geogrid reinforcements are used, membrane action within the reinforcement contributes to load distribution. The arching of soil in unreinforced and reinforced piled embankments is evaluated in this study. A small-scale test apparatus is used to model the settlement up to 5 mm in an embankment with four pile elements. Visual inspection of the soil settlement and soil-reinforcement interaction is important to explain the mechanism of arching. In this study, X-ray Computed Tomography (CT) method was used as a non-destructive technique. The arching of soil between the piles was observed in the case of rigid piles and in the case of flexible piles with grid type of reinforcement. The load carrying capacity increased up to 33% in the case of geogrid reinforcement, and the differential settlement decreased around 35%, proving the efficiency of piled embankments with geogrid reinforcements. It is also shown that, using X-ray CT method and visualization techniques provides a better understanding of soil behavior in a reinforced embankment with the flexible pile foundation system.

  4. Dental arch diameters and relationships to oral habits.

    Science.gov (United States)

    Aznar, T; Galán, A F; Marín, I; Domínguez, A

    2006-05-01

    The objective was to analyze variations in dental arch width in relation to oral habits. Maxillary and mandibular intercanine and intermolar distance were determined in relation to certain oral habits in 1297 children (ages 3 to 6 years). After an oral examination, the parents of each child completed a questionnaire about oral habits, including the use of a dummy or a bottle (or both), finger sucking, mouth breathing, breast- or bottle-feeding, and duration of these habits. Data were subjected to statistical analysis by the chi-square test for qualitative variables and analysis of variance for quantitative variables with homogeneous variances. Statistical significance was P habits, the maxillary intercanine distance was less in children who used a dummy, especially one of a round design (P = .003). The maxillary intercanine distance was also less in children who breathed through their mouth (P = .002). In most cases, dummy use and mouth breathing were associated with a reduction in the intercanine distance in the maxillary arch. A dummy habit leads to a reduction in maxillary arch width, and mouth breathing causes a reduction in the size of both arches.

  5. ArchDB 2014: structural classification of loops in proteins

    Science.gov (United States)

    Bonet, Jaume; Planas-Iglesias, Joan; Garcia-Garcia, Javier; Marín-López, Manuel A.; Fernandez-Fuentes, Narcis; Oliva, Baldo

    2014-01-01

    The function of a protein is determined by its three-dimensional structure, which is formed by regular (i.e. β-strands and α-helices) and non-periodic structural units such as loops. Compared to regular structural elements, non-periodic, non-repetitive conformational units enclose a much higher degree of variability—raising difficulties in the identification of regularities, and yet represent an important part of the structure of a protein. Indeed, loops often play a pivotal role in the function of a protein and different aspects of protein folding and dynamics. Therefore, the structural classification of protein loops is an important subject with clear applications in homology modelling, protein structure prediction, protein design (e.g. enzyme design and catalytic loops) and function prediction. ArchDB, the database presented here (freely available at http://sbi.imim.es/archdb), represents such a resource and has been an important asset for the scientific community throughout the years. In this article, we present a completely reworked and updated version of ArchDB. The new version of ArchDB features a novel, fast and user-friendly web-based interface, and a novel graph-based, computationally efficient, clustering algorithm. The current version of ArchDB classifies 149,134 loops in 5739 classes and 9608 subclasses. PMID:24265221

  6. Bare Metal Stenting for Endovascular Exclusion of Aortic Arch Thrombi

    Energy Technology Data Exchange (ETDEWEB)

    Mahnken, Andreas H., E-mail: mahnken@med.uni-marburg.de [University Hospital Giessen and Marburg, Philipps University of Marburg, Department of Diagnostic Radiology (Germany); Hoffman, Andras; Autschbach, Ruediger; Damberg, Anneke L. M., E-mail: anneke.damberg@rwth-aachen.de [University Hospital RWTH Aachen, Department of Thoracic, Cardiac and Vascular Surgery (Germany)

    2013-08-01

    BackgroundAortic thrombi in the ascending aorta or aortic arch are rare but are associated with a relevant risk of major stroke or distal embolization. Although stent grafting is commonly used as a treatment option in the descending aorta, only a few case reports discuss stenting of the aortic arch for the treatment of a thrombus. The use of bare metal stents in this setting has not yet been described.MethodsWe report two cases of ascending and aortic arch thrombus that were treated by covering the thrombus with an uncovered stent. Both procedures were performed under local anesthesia via a femoral approach. A femoral cutdown was used in one case, and a total percutaneous insertion was possible in the second case.ResultsBoth procedures were successfully performed without any periprocedural complications. Postoperative recovery was uneventful. In both cases, no late complications or recurrent embolization occurred at midterm follow-up, and control CT angiography at 1 respectively 10 months revealed no stent migration, freely perfused supra-aortic branches, and no thrombus recurrence.ConclusionTreating symptomatic thrombi in the ascending aorta or aortic arch with a bare metal stent is feasible. This technique could constitute a minimally invasive alternative to a surgical intervention or complex endovascular therapy with fenestrated or branched stent grafts.

  7. How to Perfuse: Concepts of Cerebral Protection during Arch Replacement

    Directory of Open Access Journals (Sweden)

    Andreas Habertheuer

    2015-01-01

    Full Text Available Arch surgery remains undoubtedly among the most technically and strategically challenging endeavors in cardiovascular surgery. Surgical interventions of thoracic aneurysms involving the aortic arch require complete circulatory arrest in deep hypothermia (DHCA or elaborate cerebral perfusion strategies with varying degrees of hypothermia to achieve satisfactory protection of the brain from ischemic insults, that is, unilateral/bilateral antegrade cerebral perfusion (ACP and retrograde cerebral perfusion (RCP. Despite sophisticated and increasingly individualized surgical approaches for complex aortic pathologies, there remains a lack of consensus regarding the optimal method of cerebral protection and circulatory management during the time of arch exclusion. Many recent studies argue in favor of ACP with various degrees of hypothermic arrest during arch reconstruction and its advantages have been widely demonstrated. In fact ACP with more moderate degrees of hypothermia represents a paradigm shift in the cardiac surgery community and is widely adopted as an emergent strategy; however, many centers continue to report good results using other perfusion strategies. Amidst this important discussion we review currently available surgical strategies of cerebral protection management and compare the results of recent European multicenter and single-center data.

  8. How to Perfuse: Concepts of Cerebral Protection during Arch Replacement

    Science.gov (United States)

    Habertheuer, Andreas; Wiedemann, Dominik; Kocher, Alfred; Laufer, Guenther; Vallabhajosyula, Prashanth

    2015-01-01

    Arch surgery remains undoubtedly among the most technically and strategically challenging endeavors in cardiovascular surgery. Surgical interventions of thoracic aneurysms involving the aortic arch require complete circulatory arrest in deep hypothermia (DHCA) or elaborate cerebral perfusion strategies with varying degrees of hypothermia to achieve satisfactory protection of the brain from ischemic insults, that is, unilateral/bilateral antegrade cerebral perfusion (ACP) and retrograde cerebral perfusion (RCP). Despite sophisticated and increasingly individualized surgical approaches for complex aortic pathologies, there remains a lack of consensus regarding the optimal method of cerebral protection and circulatory management during the time of arch exclusion. Many recent studies argue in favor of ACP with various degrees of hypothermic arrest during arch reconstruction and its advantages have been widely demonstrated. In fact ACP with more moderate degrees of hypothermia represents a paradigm shift in the cardiac surgery community and is widely adopted as an emergent strategy; however, many centers continue to report good results using other perfusion strategies. Amidst this important discussion we review currently available surgical strategies of cerebral protection management and compare the results of recent European multicenter and single-center data. PMID:26713319

  9. THE ETIOLOGICAL FACTORS INVOLVED IN DENTAL ARCH PERIMETER SHORTENING

    Directory of Open Access Journals (Sweden)

    Liliana Ioana Vâţă

    2012-12-01

    Full Text Available The main purpose of the study was to highlight the causes that may lead to reduction of arches: early loss of deciduous teeth, with consecutive dental drifting on the arch, followed by narrowing of the space necessary for the eruption of successional teeth, caries of the deciduous teeth or ectopic eruption of the first permanent molars. The mesial position of M1 had a frequency of 19.31% of the total number of analysed cases; maximum frequencies have been registered for the localization on the lower arch; M1 ectopia has rarely occurred on the studied batch; the frequency of lateral group mesial position was of 10.34% on the studied batch, registering maximum values for the localisation on the upper arch. The early loss of deciduous teeth was identified in almost 30% of the analysed cases, while the reduction of the space necessary for the eruption of successional teeth was registered in almost 39% of cases, space narrowing resulting both from the caries of deciduous teeth and from their early loss.

  10. Right-sided aortic arch with Kommerell′s aneurysm

    Directory of Open Access Journals (Sweden)

    Sanjay Orathi Patangi

    2014-01-01

    Full Text Available We present a case report of a 55-year-old lady who presented with progressive dysphagia and was diagnosed with a Kommerell′s aneurysm and a right-sided aortic arch. This case report outlines our management strategy and the challenges encountered during the perioperative period in a patient with this rare anomaly.

  11. UNILATERAL INCOMPLETE SUPERFICIAL PALMAR ARCH: A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Subhankar Chakraborty

    2015-12-01

    Full Text Available The functional importance of hand is revealed by its rich vascularity contributed by superficial and deep palmar arches (SPA and DPA.Superficial palmar arch is located superficial to flexor tendons, and deep palmar arch deep to lumbrical muscles. Variations are found more often in SPA than DPA, later being more or less constant. During routine undergraduate dissection, we observed, unilateral incomplete SPA being formed by superficial palmar branches of ulnar and radial artery in the right hand of a male cadaver. These two arteries remained independent without anastomosis forming incomplete arch (SPA.The superficial branch of ulnar artery entered hand superficial to flexor retinaculum and supplied middle, ring and little finger by three branches. The superficial branch of radial artery via its two branches supplied index finger and thumb. Classical SPA formation was seen on left side. The presence of an incomplete SPA as in this case is a potential danger in RA harvesting for CABG.Variations in SPA play a pivotal role in microvascular surgical procedures of hand, RAinterventions and arterial graft applications.

  12. Arch Venture Partners' investment considerations for CBRNE products and opportunities

    Science.gov (United States)

    Crandell, K.; Lazarus, S.; Gardner, P. J.

    2008-04-01

    ARCH is interested in building leading, highly-valued companies from leading research. Toward that end we value innovations created by the leading researchers in the world, many of which are funded to solve critical scientific challenges including those in the instrumentation and CBRNE area. The most important CBRNE innovations we have seen at ARCH are breakthroughs involving significant unaddressed technology risk and have the potential for broad proprietary intellectual property as a result. The model ARCH has evolved in instrumentation is to look for a breakthrough innovation, with strong intellectual property and continue to strengthen the patent estate through the life of the company. ARCH looks to build companies around leading interdisciplinary scientific and engineering teams, and we favor platform technology that can be applied to multiple market applications both commercial and government. As part of a strategy to build a great company, addressing important CBRNE challenges can help a company strengthen its technical team and its IP estate. This supports a focus on early low volume markets on the way toward addressing a fuller portfolio of applications. Experienced Venture Capitalists can help this process by identifying important executive talent, partners and applications, offering financial syndication strength, and helping shape the company's strategy to maximize the ultimate value realized.

  13. 4-D MRI flow analysis in the course of interrupted aortic arch reveals complex morphology and quantifies amount of collateral blood flow

    Energy Technology Data Exchange (ETDEWEB)

    Hirtler, Daniel [University Hospital Freiburg, Department of Pediatric Cardiology and Congenital Heart Disease, Freiburg (Germany); Geiger, Julia; Jung, Bernd [University Hospital Freiburg, Department of Radiology, Medical Physics, Freiburg (Germany); Markl, Michael [Northwestern University, Departments of Radiology and Biomedical Engineering, Chicago, IL (United States); Arnold, Raoul [University Hospital Heidelberg, Department of Pediatric Cardiology and Congenital Heart Disease, Heidelberg (Germany)

    2013-08-15

    We present findings in a 17-year-old with interrupted aortic arch, in whom standard imaging techniques missed functional and morphological problems. Flow-sensitive four-dimensional magnetic resonance (4-D MR) enabled assessment of the complex anatomy and blood-flow characteristics in the entire aorta and direct quantification of blood flow in collateral vessels. Our findings highlight the entire morphological and functional problem of interrupted aortic arch and illustrate the potential of flow-sensitive 4-D MR for surgical planning in congenital heart disease. (orig.)

  14. File list: ALL.Emb.50.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ALL.Emb.50.AllAg.Maxillary_arch_junction mm9 All antigens Embryo Maxillary arch jun...ction SRX699776 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/ALL.Emb.50.AllAg.Maxillary_arch_junction.bed ...

  15. File list: DNS.Emb.20.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available DNS.Emb.20.AllAg.Maxillary_arch_junction mm9 DNase-seq Embryo Maxillary arch juncti...on http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/DNS.Emb.20.AllAg.Maxillary_arch_junction.bed ...

  16. File list: His.Emb.05.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available His.Emb.05.AllAg.Maxillary_arch_junction mm9 Histone Embryo Maxillary arch junction... SRX699776 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/His.Emb.05.AllAg.Maxillary_arch_junction.bed ...

  17. File list: Pol.Emb.50.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.50.AllAg.Maxillary_arch_junction mm9 RNA polymerase Embryo Maxillary arch j...unction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Emb.50.AllAg.Maxillary_arch_junction.bed ...

  18. File list: His.Emb.10.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available His.Emb.10.AllAg.Maxillary_arch_junction mm9 Histone Embryo Maxillary arch junction... SRX699776 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/His.Emb.10.AllAg.Maxillary_arch_junction.bed ...

  19. File list: Pol.Emb.10.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.10.AllAg.Maxillary_arch_junction mm9 RNA polymerase Embryo Maxillary arch j...unction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Emb.10.AllAg.Maxillary_arch_junction.bed ...

  20. File list: Oth.Emb.10.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Oth.Emb.10.AllAg.Maxillary_arch_junction mm9 TFs and others Embryo Maxillary arch j...unction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Oth.Emb.10.AllAg.Maxillary_arch_junction.bed ...

  1. File list: ALL.Emb.10.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ALL.Emb.10.AllAg.Maxillary_arch_junction mm9 All antigens Embryo Maxillary arch jun...ction SRX699776 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/ALL.Emb.10.AllAg.Maxillary_arch_junction.bed ...

  2. File list: Unc.Emb.05.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Unc.Emb.05.AllAg.Maxillary_arch_junction mm9 Unclassified Embryo Maxillary arch jun...ction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Unc.Emb.05.AllAg.Maxillary_arch_junction.bed ...

  3. File list: Unc.Emb.10.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Unc.Emb.10.AllAg.Maxillary_arch_junction mm9 Unclassified Embryo Maxillary arch jun...ction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Unc.Emb.10.AllAg.Maxillary_arch_junction.bed ...

  4. File list: ALL.Emb.05.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ALL.Emb.05.AllAg.Maxillary_arch_junction mm9 All antigens Embryo Maxillary arch jun...ction SRX699776 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/ALL.Emb.05.AllAg.Maxillary_arch_junction.bed ...

  5. File list: His.Emb.20.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available His.Emb.20.AllAg.Maxillary_arch_junction mm9 Histone Embryo Maxillary arch junction... SRX699776 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/His.Emb.20.AllAg.Maxillary_arch_junction.bed ...

  6. File list: Oth.Emb.50.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Oth.Emb.50.AllAg.Maxillary_arch_junction mm9 TFs and others Embryo Maxillary arch j...unction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Oth.Emb.50.AllAg.Maxillary_arch_junction.bed ...

  7. File list: DNS.Emb.50.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available DNS.Emb.50.AllAg.Maxillary_arch_junction mm9 DNase-seq Embryo Maxillary arch juncti...on http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/DNS.Emb.50.AllAg.Maxillary_arch_junction.bed ...

  8. File list: DNS.Emb.05.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available DNS.Emb.05.AllAg.Maxillary_arch_junction mm9 DNase-seq Embryo Maxillary arch juncti...on http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/DNS.Emb.05.AllAg.Maxillary_arch_junction.bed ...

  9. File list: Pol.Emb.05.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.05.AllAg.Maxillary_arch_junction mm9 RNA polymerase Embryo Maxillary arch j...unction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Emb.05.AllAg.Maxillary_arch_junction.bed ...

  10. File list: Unc.Emb.50.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Unc.Emb.50.AllAg.Maxillary_arch_junction mm9 Unclassified Embryo Maxillary arch jun...ction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Unc.Emb.50.AllAg.Maxillary_arch_junction.bed ...

  11. File list: ALL.Emb.10.AllAg.Maxillary_arch [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ALL.Emb.10.AllAg.Maxillary_arch mm9 All antigens Embryo Maxillary arch SRX699775 ht...tp://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/ALL.Emb.10.AllAg.Maxillary_arch.bed ...

  12. File list: Pol.Emb.20.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Pol.Emb.20.AllAg.Maxillary_arch_junction mm9 RNA polymerase Embryo Maxillary arch j...unction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Emb.20.AllAg.Maxillary_arch_junction.bed ...

  13. File list: Unc.Emb.20.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Unc.Emb.20.AllAg.Maxillary_arch_junction mm9 Unclassified Embryo Maxillary arch jun...ction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Unc.Emb.20.AllAg.Maxillary_arch_junction.bed ...

  14. File list: Oth.Emb.05.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Oth.Emb.05.AllAg.Maxillary_arch_junction mm9 TFs and others Embryo Maxillary arch j...unction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Oth.Emb.05.AllAg.Maxillary_arch_junction.bed ...

  15. File list: His.Emb.50.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available His.Emb.50.AllAg.Maxillary_arch_junction mm9 Histone Embryo Maxillary arch junction... SRX699776 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/His.Emb.50.AllAg.Maxillary_arch_junction.bed ...

  16. File list: ALL.Emb.05.AllAg.Maxillary_arch [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ALL.Emb.05.AllAg.Maxillary_arch mm9 All antigens Embryo Maxillary arch SRX699775 ht...tp://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/ALL.Emb.05.AllAg.Maxillary_arch.bed ...

  17. File list: DNS.Emb.10.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available DNS.Emb.10.AllAg.Maxillary_arch_junction mm9 DNase-seq Embryo Maxillary arch juncti...on http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/DNS.Emb.10.AllAg.Maxillary_arch_junction.bed ...

  18. File list: ALL.Emb.20.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ALL.Emb.20.AllAg.Maxillary_arch_junction mm9 All antigens Embryo Maxillary arch jun...ction SRX699776 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/ALL.Emb.20.AllAg.Maxillary_arch_junction.bed ...

  19. File list: ALL.Emb.50.AllAg.Maxillary_arch [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ALL.Emb.50.AllAg.Maxillary_arch mm9 All antigens Embryo Maxillary arch SRX699775 ht...tp://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/ALL.Emb.50.AllAg.Maxillary_arch.bed ...

  20. CREATIVITY METHODS IN TEACHING THE ARCH-DESIGN STUDIO

    Directory of Open Access Journals (Sweden)

    EIGBEONAN Andrew B.

    2013-07-01

    Full Text Available The aim of this paper is to search and find methods of fostering creativity or ideas relating to creativity in teaching the arch-design studio. Teaching creativity through its methods will be making the students grounded in designing with creativity ideas and therefore we can have professionals that design and build with satisfaction, safety and complementary. It means we can have real buildings and places that satisfy our clients, the society and in harmony with the environment. Although there are similarities in the curricula of training architects all over the world, but educators go about it in their own convenient and suitable ways and styles. The ideas of creativity have been part of architecture from the onset, but are not deligently applied and also not formally incorporated in the curricula of training. The topic is also very relevant and timely as arch-educators and other stakeholders are of the opinion that something has to be done to improve the ways and methods of training architects, especially the teaching of the arch-design studio with regards to creativity. Through exploration of literature and interviews (physical and telephone call this paper finds methods of stimulating creativity ideas in the teaching of arch-design studio. Some of the methods of motivating creativity found in teaching the arch-design studio are: analogy, metaphors, biomimicry, brainstorming, attribute listing, mental map, TRIZ, restrictions, charrette, browsing, excursions, focus groups, other peoples viewpoints, using crazy ideas, using experts, visualizing a goal, working with dreams and images and giving students design tools such as drawings CAD and model making.

  1. Asynchronous onset of clinical disease in BSE-infected macaques.

    Science.gov (United States)

    Montag, Judith; Schulz-Schaeffer, Walter; Schrod, Annette; Hunsmann, Gerhard; Motzkus, Dirk

    2013-07-01

    To estimate the effect of the variability of prion disease onset on primary bovine spongiform encephalopathy transmission to humans, we studied 6 cynomolgus macaques. The preclinical incubation period was significantly prolonged in 2 animals, implying that onset of variant Creutzfeldt-Jacob disease in humans could be more diverse than previously expected.

  2. Lucy's flat feet: the relationship between the ankle and rearfoot arching in early hominins.

    Directory of Open Access Journals (Sweden)

    Jeremy M DeSilva

    Full Text Available BACKGROUND: In the Plio-Pleistocene, the hominin foot evolved from a grasping appendage to a stiff, propulsive lever. Central to this transition was the development of the longitudinal arch, a structure that helps store elastic energy and stiffen the foot during bipedal locomotion. Direct evidence for arch evolution, however, has been somewhat elusive given the failure of soft-tissue to fossilize. Paleoanthropologists have relied on footprints and bony correlates of arch development, though little consensus has emerged as to when the arch evolved. METHODOLOGY/PRINCIPAL FINDINGS: Here, we present evidence from radiographs of modern humans (n = 261 that the set of the distal tibia in the sagittal plane, henceforth referred to as the tibial arch angle, is related to rearfoot arching. Non-human primates have a posteriorly directed tibial arch angle, while most humans have an anteriorly directed tibial arch angle. Those humans with a posteriorly directed tibial arch angle (8% have significantly lower talocalcaneal and talar declination angles, both measures of an asymptomatic flatfoot. Application of these results to the hominin fossil record reveals that a well developed rearfoot arch had evolved in Australopithecus afarensis. However, as in humans today, Australopithecus populations exhibited individual variation in foot morphology and arch development, and "Lucy" (A.L. 288-1, a 3.18 Myr-old female Australopithecus, likely possessed asymptomatic flat feet. Additional distal tibiae from the Plio-Pleistocene show variation in tibial arch angles, including two early Homo tibiae that also have slightly posteriorly directed tibial arch angles. CONCLUSIONS/SIGNIFICANCE: This study finds that the rearfoot arch was present in the genus Australopithecus. However, the female Australopithecus afarensis "Lucy" has an ankle morphology consistent with non-pathological flat-footedness. This study suggests that, as in humans today, there was variation in arch

  3. Medical care in free-beseiged Missolonghi (1822-1826). Johann Jacob Meyer and the first military hospital.

    Science.gov (United States)

    Balanika, Alexia P; Baltas, Christos S; Leone, Antonio

    2016-08-01

    During the siege of Missolonghi by the Ottomans the conditions of hygiene living, clothing and feeding of the vast majority of enslaved Greeks could be assessed as deprived and miserable. The humid climate and geophysical environment favored the outbreak of epidemics that further darkened an already unfavorable situation of the fighters and their families. Necessarily, the priority was to meet the military and economic needs and secondarily tackling public health issues, health care and medicine - social welfare. The inadequate infrastructure of nursing care, the limited number of health personnel and serious shortages into pharmaceutical material revealed the resolution of those doctors who provided their services during the siege. Johann Jacob Meyer, a famous Swiss philhellene, a man known as the first journalist in Greece, along with his Greek wife, contributed to the founding and organization of the first military hospital and to the improvement of the general health care during the siege of Missolonghi (1822-1826).

  4. Correlation between arch form and facial form: A cross sectional study

    Directory of Open Access Journals (Sweden)

    Sanjna Nayar

    2015-01-01

    Full Text Available Arch form is a key determinant in teeth position. Teeth selection and placement must be based on the functional and esthetic needs of the patient. Keeping in mind, the biomechanics involved with the prosthesis. The aim of the study was to evaluate the correlation between arch form and facial form. About 40 individuals in the age group of 20-25 years were involved in the study. The arch form and facial form were analyzed statistically to check for any correlation. It was found that, 63.63% of leptoprosophic individuals had squarish arch form while, 54.6% of mesoprosophic faces had ovoid arch form.

  5. The effect of clinical use and sterilization on selected orthodontic arch wires.

    Science.gov (United States)

    Smith, G A; von Fraunhofer, J A; Casey, G R

    1992-08-01

    The effect of clinical use and various sterilization/disinfection protocols on three types of nickel-titanium, and one type each of beta-titanium and stainless steel arch wire was evaluated. The sterilization/disinfection procedures included disinfection alone or in concert with steam autoclave, dry heat, or cold solution sterilization. No clinically significant differences were found between new and used arch wires. The direction of load application to the arch wire and the particular segment of arch wire tested was found to cause substantial differences in generated loads for certain arch wire types.

  6. Correlation of atherosclerotic changes in peripheral arteries with pathological involvement of aortic arch in coronary bypass patients

    Directory of Open Access Journals (Sweden)

    Eshraghi N

    2010-10-01

    Full Text Available "nBackground: A correlation between coronary artery disease (CAD and atherosclerosis of peripheral arteries and the determination of noninvasive indexes for its existence and extent have been sought by many researchers. Some studies report that the intima-media thickness (IMT of peripheral arteries could play this role. This study evaluated the correlation between the IMTs of common carotid and common femoral arteries and the degree of atherosclerosis in aortic arch and to evaluate the severity of CAD in candidates of coronary artery bypass grafting (CABG."n "nMethods: In a cross-sectional analytic-descriptive study, The severity of CAD, the grade of atherosclerosis of the aortic arch, and the IMTs of the common carotid and common femoral arteries were determined."n "nResults: There was a significant weak positive correlation between the IMT of common carotid artery (ρ = 0.193, p = 0.039 and common femoral artery (ρ = 0.206, p = 0.028 with the number of involved carotid vessels; the mean of these two parameters was not significantly different between the three CAD groups. There was not any significant relation between the IMTs of common carotid and common femoral arteries with the severity of atherosclerosis in the aortic arch too. There was not any significant relation between the presences of atherosclerotic plaque in the common carotid or the common femoral arteries with the severity of CAD. The severe atherosclerosis of the aortic arch was significantly higher in patients with three vessel disease."n "nConclusion: According to our results, the IMTs of common carotid and/or common femoral arteries may increase with the severity of CAD; however, these parameters are not a surrogate for predicting the CAD severity.

  7. An Analytical Solution for Lateral Buckling Critical Load Calculation of Leaning-Type Arch Bridge

    Directory of Open Access Journals (Sweden)

    Ai-rong Liu

    2014-01-01

    Full Text Available An analytical solution for lateral buckling critical load of leaning-type arch bridge was presented in this paper. New tangential and radial buckling models of the transverse brace between the main and stable arch ribs are established. Based on the Ritz method, the analytical solution for lateral buckling critical load of the leaning-type arch bridge with different central angles of main arch ribs and leaning arch ribs under different boundary conditions is derived for the first time. Comparison between the analytical results and the FEM calculated results shows that the analytical solution presented in this paper is sufficiently accurate. The parametric analysis results show that the lateral buckling critical load of the arch bridge with fixed boundary conditions is about 1.14 to 1.16 times as large as that of the arch bridge with hinged boundary condition. The lateral buckling critical load increases by approximately 31.5% to 41.2% when stable arch ribs are added, and the critical load increases as the inclined angle of stable arch rib increases. The differences in the center angles of the main arch rib and the stable arch rib have little effect on the lateral buckling critical load.

  8. Central retinal artery occlusion following laser treatment for ocular ischemic aortic arch syndrome

    Directory of Open Access Journals (Sweden)

    Shah, Payal J.

    2015-12-01

    Full Text Available Objective: Ocular ischemic syndrome is a rare blinding condition generally caused by disease of the carotid artery. We describe a 69-year-old female with a 50 pack-year smoking history with aortic arch syndrome causing bilateral ocular ischemic syndrome. Methods: The patient presented with progressive visual loss and temple pain. Slit lamp biomicroscopy revealed bilateral iris neovascularization. This finding prompted a cardiovascular work up. Panretinal photocoagulation with retrobulbar block was performed in the right eye. Results: A temporal artery biopsy was negative. The carotid duplex sound showed only a 1–39% stenosis. MRA revealed a more proximal occlusion of the aortic branch for which she underwent subclavian carotid bypass surgery. At the one month follow up, the right eye suffered profound vision loss secondary to a central retinal artery occlusion. Conclusion: Ocular neovascularization may be one of the clinical manifestations of aortic arch syndrome. This case also illustrates the limitations of relying solely on carotid duplex ultrasound testing. We caution against overly aggressive panretinal photocoagulation utilizing retrobulbar anesthesia.

  9. Super-light pearl-chain arch vaults

    DEFF Research Database (Denmark)

    Hertz, Kristian Dahl; Halding, Philip Skov

    2014-01-01

    are assembled on the erection site by means of post-tensioning and lifted in place in buildings and bridges. The super-light SL-deck element is developed by the company Abeo Ltd and The Technical University of Denmark for plane floor structures in buildings. However, this deck element is designed in such a way...... that it is also applicable as basic elements for super-light pearl-chain vaults. Machines and software have been developed for automatic mass production of the elements, and the first factory has started production in Denmark in 2014 delivering SL-deck elements for a variety of building projects. This means...... that the basic elements have become affordable and arch vaults can now be applied at a very low cost and much cheaper than ever before. The new technology is therefore capable of re-introducing the arch vault in construction. The application of SLdecks means that the advantages of these elements are incorporated...

  10. Antenatal evaluation of fetal interrupted aortic arch type B

    Directory of Open Access Journals (Sweden)

    Ali Babacan

    2015-06-01

    Full Text Available Interruption of the aortic arch (IAA is a rare, severe form of congenital heart defect characterized by complete anatomical discontinuity between two adjacent segments of the aortic arch. The data on the features and outcomes of fetal IAA are limited. Three anatomical types have been described according to the site of interruption. The current recommendations for screening on the obstetric fetal anomaly scan include identification of a 4-chamber view, all 4 valves, and the outflow tracts, all of which can appear to be normal to the ultrasonographer in fetuses with conotruncal anomalies. Although the identification of IAA on a prenatal echocardiogram can be challenging, a number of anatomic features can facilitate the diagnosis. We aim to present the features and outcome of a case of IAA type B referred to our centre in the light of literatures.

  11. Congenital absence of the atlas posterior arch. A case report.

    Science.gov (United States)

    Huggare, J

    1995-02-01

    A report of a healthy young adult woman with non-pathological congenital absence of the lateral and posterior parts of the atlas is presented. This occurred in association with a steep mandibular plane angle and an extremely obtuse gonial angle. Similar facial features are common in females with hypoplastic dorsal arches, and this case illustrates the intimate developmental association between the upper part of the cervical spine and the craniofacial complex.

  12. Double arch mirror study. Part 3: Fabrication and test report

    Science.gov (United States)

    Vukobratovich, D.; Hillman, D.

    1983-01-01

    A method of mounting a cryogenically cooled, lightweight, double arch, glass mirror was developed for infrared, astronomical telescopes such as the Space Infrared Telescope Facility (SIRTF). A 50 cm, fused silica mirror which was previously fabricated was modified for use with a new mount configuration. This mount concept was developed. The modification of the mirror, the fabrication of the mirror mount, and the room temperature testing of the mounted mirror are reported. A design for a SIRTF class primary mirror is suggested.

  13. Hemiarthroplasty for proximal humeral fracture: restoration of the Gothic arch.

    Science.gov (United States)

    Krishnan, Sumant G; Bennion, Phillip W; Reineck, John R; Burkhead, Wayne Z

    2008-10-01

    Proximal humerus fractures are the most common fractures of the shoulder girdle, and initial management of these injuries often determines final outcome. When arthroplasty is used to manage proximal humeral fractures, surgery remains technically demanding, and outcomes have been unpredictable. Recent advances in both technique and prosthetic implants have led to more successful and reproducible results. Key technical points include restoration of the Gothic arch, anatomic tuberosity reconstruction, and minimal soft tissue dissection.

  14. ON THE CYTOTOXICITY OF ORTHODONTIC ARCHES IN HUMAN FIBROBLAST CULTURES

    Directory of Open Access Journals (Sweden)

    Liliana-Gabriela HALIŢCHI

    2015-12-01

    Full Text Available The present study analyzes the orthodontic nickel-titanium alloy with orthodontic shape memory (Niti GAC arches, Nitinol 3M arches, Beta Titanium 3M arches from the viewpoint of its cytotoxicity. Apart from the intrinsic toxicity of the metals upon cells, corrosion may dramatically alter the behaviour of alloys, as evidenced by the in vitro and in vivo studies developed in the field. Due to the high and variable nickel content, its is possible that, at least theoretically, the released ions should produce – as a result of intraoral corrosion – secondary effects, which makes necessary to assert the cytotoxicity of NiTi alloys prior to their safe utilizationor in the oral cavity of children and young patients. Evaluation of cell morphology and determination of cell viability, following exposure to the 3 types of orthodontic materials, evidenced no toxic reactions. Several problems are still to be elucidated, related to the consequences of the surface conditions, of the dissolution and in vivo release of the nickel ions after a longer treatment, of the accumulations of ion traces, of the response of the dental-periodontal tissues, of the effects manifested at cell and molecular level. Apart from the intrisic toxicity of metals upon cells, corrosion may dramatically influence the behaviour of alloys under in vitro conditions, comparatively with the in vivo ones, the nitinol samples being biologically safe.

  15. C-arm guided closed reduction of zygomatic arch fracture

    Energy Technology Data Exchange (ETDEWEB)

    Eo, Yoon Ki; Lee, Dong Kun [College of Medicine, Wonkwang Univ., Iksan (Korea, Republic of); Kim, Jeong Sam; Jang, Young Il [Kwangyang College, Kwangyang (Korea, Republic of)

    1999-04-01

    The zygomatic arch is structurally protruded and is easily fractured. The classic management of zygomatic arch fracture has been mentioned the Keen, Lothrop, Dingman and Alling and threaded K-wire. All of the above methods have advantages and disadvantages. To minimize the disadvantages, we performed threaded K-wire for the first time using C-arm image intensifier. The subjects were 16 patients with Knight North group II (Zygomatic arch fracture). Among them the C-arm was used in 12 patients and the operator used sensitivity general method in 4 patients and confirmed the operation by mobile X-ray equipment. In conclusion, both groups were satisfied surgically and cosmetically. Using the C-arm, actual image at the time operation was clear and satisfied, the surrounding tissue damage was minimized and at was more accurately completed. The operation time was shortened by 30 to 60 minutes proving it to be an efficient method. We suggest though that further studies be needed to evaluate the radiation effect on these patients.

  16. Space maintainer effects on intercanine arch width and length.

    Science.gov (United States)

    Dincer, M; Haydar, S; Unsal, B; Turk, T

    1996-01-01

    In order to investigate the effects of space maintainers in intercanine arch width and length, twenty cases, characterized with the early loss of mandibular primary molars were selected and divided into two groups. The treatment group used removable space maintainers, while the other ten cases served as the control group. The first dental casts of the treatment and control groups were obtained when the primary canines were in the mouth. After the eruption of permanent canines second dental casts were obtained in both groups. Six measurements were made on the dental casts of each patient. No parameter was found to be statistically significant in the treatment group. In the control group the increase in intercanine arch width and perimeter were found to be statistically significant. Also the increase at the buccal and lingual bone measurements were found to be statistically significant. These results showed that space maintainers might cease the increase in intercanine arch width and length during the transition period between the primary and permanent canines.

  17. Modelling autogenous expansion for magnesia concrete in arch dams

    Institute of Scientific and Technical Information of China (English)

    Feng JIN; Guoxin ZHANG; Xiaoqing LUO; Chuhan ZHANG

    2008-01-01

    Magnesia Concrete is a kind of expansive con-crete used in Chinese hydraulic engineering more and more widely. To evaluate the effects of autogenous expan-sion on the stresses of arch dams, a simple model of auto-genous expansion for Magnesia Concrete in dam engineering is presented. This model is based on three assumptions: 1) the total amount of autogenous expan-sion of Magnesia Concrete is related only to the properties of materials and mixing of concrete; 2) the autogenous expansion of Magnesia Concrete is irreversible due to the irreversibility of hydration reaction of Magnesia in the concrete; 3) the autogenous expansion strain rates of Magnesia Concrete bear a relation between temperature and residual Magnesia per unit volume of concrete. The model is verified by some experimental data of autogen-ous expansion of Magnesia Concrete and field-measured data of an arch dam in China. Embedded into finite ele-ment arch dam simulation software, this model is employed to simulate the effects of autogenous expansion of Magnesia Concrete in hydraulic engineering.

  18. First and second branchial arch syndromes: multimodality approach

    Energy Technology Data Exchange (ETDEWEB)

    Senggen, Elodie; Laswed, Tarek; Meuwly, Jean-Yves; Maestre, Leonor Alamo; Meuli, Reto; Gudinchet, Francois [University Hospital of Lausanne, Radiology Department, Lausanne (Switzerland); Jaques, Bertrand [University Hospital of Lausanne, Department of Otorhinolaryngology, Lausanne (Switzerland)

    2011-05-15

    First and second branchial arch syndromes (BAS) manifest as combined tissue deficiencies and hypoplasias of the face, external ear, middle ear and maxillary and mandibular arches. They represent the second most common craniofacial malformation after cleft lip and palate. Extended knowledge of the embryology and anatomy of each branchial arch derivative is mandatory for the diagnosis and grading of different BAS lesions and in the follow-up of postoperative patients. In recent years, many new complex surgical approaches and procedures have been designed by maxillofacial surgeons to treat extensive maxillary, mandibular and external and internal ear deformations. The purpose of this review is to evaluate the role of different imaging modalities (orthopantomogram (OPG), lateral and posteroanterior cephalometric radiographs, CT and MRI) in the diagnosis of a wide spectrum of first and second BAS, including hemifacial microsomia, mandibulofacial dysostosis, branchio-oto-renal syndrome, Pierre Robin sequence and Nager acrofacial dysostosis. Additionally, we aim to emphasize the importance of the systematic use of a multimodality imaging approach to facilitate the precise grading of these syndromes, as well as the preoperative planning of different reconstructive surgical procedures and their follow-up during treatment. (orig.)

  19. The Foot’s Arch and the Energetics of Human Locomotion

    Science.gov (United States)

    Stearne, Sarah M.; McDonald, Kirsty A.; Alderson, Jacqueline A.; North, Ian; Oxnard, Charles E.; Rubenson, Jonas

    2016-01-01

    The energy-sparing spring theory of the foot’s arch has become central to interpretations of the foot’s mechanical function and evolution. Using a novel insole technique that restricted compression of the foot’s longitudinal arch, this study provides the first direct evidence that arch compression/recoil during locomotion contributes to lowering energy cost. Restricting arch compression near maximally (~80%) during moderate-speed (2.7 ms−1) level running increased metabolic cost by + 6.0% (p < 0.001, d = 0.67; unaffected by foot strike technique). A simple model shows that the metabolic energy saved by the arch is largely explained by the passive-elastic work it supplies that would otherwise be done by active muscle. Both experimental and model data confirm that it is the end-range of arch compression that dictates the energy-saving role of the arch. Restricting arch compression had no effect on the cost of walking or incline running (3°), commensurate with the smaller role of passive-elastic mechanics in these gaits. These findings substantiate the elastic energy-saving role of the longitudinal arch during running, and suggest that arch supports used in some footwear and orthotics may increase the cost of running. PMID:26783259

  20. Mechanics Evolution Characteristics Analysis of Pressure-arch in Fully-mechanized Mining Field

    Directory of Open Access Journals (Sweden)

    S.R. Wang

    2014-09-01

    Full Text Available Based on a practical engineering, the three-dimension computational model was built using FLAC3D under the fullymechanized mining condition. Considering four variation factors, such as the distance of mining advancing, the strength of the surrounding rock, the speed of mining advancing and the dip angle of the coal seam, the mechanics evolution characteristics of the pressure-arch were analyzed. The result showed that for the horizontal seam, the geometric shape of the pressure-arch varied from flat arch to round arch gradually and the height and thickness of the pressure-arch also increased; the maximum principal stress in the skewback also increased with the working face advancing. With the strength of the surrounding rock from soft to hard, the arch thickness reduced, and the arch loading decreased. To improve the mining speed can do some contributions to the stability of the pressure-arch in the mining field. With the increase of dip angle of the seam, the pressure-arch displayed an asymmetric shape, the vault was tilted and moved to the upward direction. At the same time, the thickness of the pressure-arch increased, and the stress concentration in the skewback tended to be further intensified.

  1. Effect of aging on the configurational change of the aortic arch

    Directory of Open Access Journals (Sweden)

    Atsuhiro Kojima

    2016-04-01

    Full Text Available We explored the relationship between aging and the configuration of the aortic arch using computed tomography angiography (CTA. We retrospectively reviewed CTA obtained in 140 cases. The configuration of the aortic arch was categorized into three types based on the criteria mentioned by Madhwal et al., and the relationships between each configuration and patient characteristics were analyzed. Anomalies of the aortic arch were also explored. Twenty patients had a type-1 aortic arch (mean age, 56.1 years, 30 patients had a type-2 aortic arch (mean age, 66.3 years, and 89 patients had a type-3 aortic arch (mean age, 71.7 years. The mean age of patients with a type-3 aortic arch was significantly higher than that of patients with a type-1 aortic arch. No significant correlations between the type of aortic arch and other factors, such as smoking habit, were seen. The configuration of the aortic arch in our study appears to be significantly affected by the age of the patients.

  2. CORRELATION BETWEEN DURATION OF BOTTLE-FEEDING AND DENTAL ARCH MEASUREMENT IN DECIDUOUS DENTITION

    Directory of Open Access Journals (Sweden)

    Meldo Mahniza

    2015-06-01

    Full Text Available The purpose of this study was to observe the correlation between duration of bottle feeding and dental arch measurement in deciduous dentition. Duration of bottle feeding was divided into 4 groups: ≤ 24 months, 25 – 36 months, 37 – 48 months, and > 48 months. The subjects were 120 kindergarten pupils, aged 3 – 5 years old. Measurements was done on the models of maxilla and mandible with digital caliper for the width and length of dental arch and using flexible curve for dental arch circumference. Pearson correlation showed a weak association for anterior arch width (r=0.206, posterior arch width (r=0.195, and anterior circumference (r=0.206 of maxilla and posterior arch width (r=0.279, anterior circumference (r=0.226 of mandible. One-way Anova was performed to analyze the differences of dental arch measurements among duration of bottle-feeding groups. The results showed that there were significant differences of dental arch measurements for anterior arch width of maxilla, posterior arch width of mandible, and anterior circumference of mandible (p<0,05.

  3. A STUDY ON SUPERFICIAL PALMAR ARCH AND IT’S VARIATIONS

    Directory of Open Access Journals (Sweden)

    Venkateswara Rao

    2015-03-01

    Full Text Available INTRODUCTION: Knowledge of the frequency of anatomical variations of arterial pattern of hand is crucial for safe and successful hand surgical approach, diagnostic and therapeutic procedures. The superficial pal mar arch is a major blood supply to the hand. Various ano malous patterns in the superficial arch of hand are reported. The superficial pal mar arch is formed predominantly by ulnar artery with a contribution from superficial branch of radial artery. OBSERVATIONS: Superficial palmar arch is dissected within the p alm and observed from its origin to termination. Variations in its origin, branches were observed. A classic superficial palmar arch was found in 10% [5/50]. O ut of dissected specimens complete arch found in 67% and incomplete arch was 33%. Incomplete arch is formed by ulnar artery alone. It supply four and half fingers and give five branches. Majority of arches is supplied by three and half fingers and gives four branches. DISCUSSION: Many attempts have been made to classify these variations. A complex cla ssification of superficial pal mar arch by Coleman & Anson [1961]. S ince then, many other classification have been suggested by different authors [Karlsson & N iechajev, 1982; al - Turk & Metcalf, 1984; Doscher et al. 1985; Ruengsakulrachh et al. 2001;] provi des simplest understanding of distribution of the arches. Although the classical pattern of the arch occurs in frequently, anatomical presence of a complete superficial palmar arch varies from 84% to 66% [Coleman & Anson]. This incidence was lower in the c urrent study and might be a reflection of sample size [52 hands]. The median artery was found in 10% of the hands, similar frequency to that reported by McCormack et al. [1953].

  4. The Layout and Simulation of Logarithmic Spiral Double Curved Arch Dam Transverse Joints%The Layout and Simulation of Logarithmic Spiral Double Curved Arch Dam Transverse Joints

    Institute of Scientific and Technical Information of China (English)

    DU Ting-na; DU Qi-lu; HUI Yuan

    2011-01-01

    Because of its good condition with mechanics, logarithmic spiral double curve arch bam has been widely used in the practical engineering. The introduction of a new method in how to divide transverse joint in arch dam will be given and the further research of its calculation has been done. The C++ is used in electronic procedure and the 3D simulation has been finished with AutoCAD, which will provide the object model for computer simulation of the arch dam and the division of finite element mesh. Meanwhile, this method in dividing the transverse joint in arch dam also can be taken as the calculated basis for the design and calculation of arch dam, construction lofting and the calculation of the work amount.

  5. ARCHES: Advancing Research & Capacity in Hydrologic Education and Science

    Science.gov (United States)

    Milewski, A.; Fryar, A. E.; Durham, M. C.; Schroeder, P.; Agouridis, C.; Hanley, C.; Rotz, R. R.

    2013-12-01

    Educating young scientists and building capacity on a global scale is pivotal towards better understanding and managing our water resources. Based on this premise the ARCHES (Advancing Research & Capacity in Hydrologic Education and Science) program has been established. This abstract provides an overview of the program, links to access information, and describes the activities and outcomes of student participants from the Middle East and North Africa. The ARCHES program (http://arches.wrrs.uga.edu) is an integrated hydrologic education approach using online courses, field programs, and various hands-on workshops. The program aims to enable young scientists to effectively perform the high level research that will ultimately improve quality of life, enhance science-based decision making, and facilitate collaboration. Three broad, interlinked sets of activities are incorporated into the ARCHES program: (A1) the development of technical expertise, (A2) the development of professional contacts and skills, and (A3) outreach and long-term sustainability. The development of technical expertise (A1) is implemented through three progressive instructional sections. Section 1: Students were guided through a series of online lectures and exercises (Moodle: http://wrrs.uga.edu/moodle) covering three main topics (Remote Sensing, GIS, and Hydrologic Modeling). Section 2: Students participated in a hands-on workshop hosted at the University of Georgia's Water Resources and Remote Sensing Laboratory (WRRSL). Using ENVI, ArcGIS, and ArcSWAT, students completed a series of lectures and real-world applications (e.g., Development of Hydrologic Models). Section 3: Students participated in field studies (e.g., measurements of infiltration, recharge, streamflow, and water-quality parameters) conducted by U.S. partners and international collaborators in the participating countries. The development of professional contacts and skills (A2) was achieved through the promotion of networking

  6. Pre-Exilic Halakhic Text in Judeo-Spanish from the Cairo Genizah by R. Jacob Canpanton

    Directory of Open Access Journals (Sweden)

    Arad, Dotan

    2013-12-01

    Full Text Available This article brings to light a unique responsum preserved in the Taylor-Schechter Cairo Genizah collection. Though it does expound upon the halakhic and historic content of the responsum, these do not introduce many innovations, and are not the source of its uniqueness. The singularity of the document is that the text, written in Hebrew letters, is in Castilian vernacular with words and expressions in Hebrew. Whereas in Islamic lands a tradition of halakhic writing in Judeo-Arabic developed (until its disappearance in the late Middle Ages, halakhic writings in a language other than Hebrew or Aramaic were rare in Europe. The responsum was composed, in our estimation, in the 15th century, and is one of relatively few written in Spain in this period that have been preserved. The responsum enriches our knowledge of the language of the Jews while still in the Peninsula, and also sheds light on their religious and cultural life. It was authored by R. Jacob Ca[n]-panton, whom we suggest is the father of the well-known scholar R. Isaac Canpanton. Information on R. Jacob is limited, and until now there were no known halakhic writings of his. If our identification is correct, it serves to illuminate further the personality of this Jewish sage.Este artículo da a conocer un responsum único conservado en la colección Taylor-Schechter de la Guenizá de El Cairo. Se edita el texto y se explica el contenido halájico e histórico del responsum, si bien, desde ese punto de vista no contiene muchas innovaciones. Su singularidad radica en que está escrito en castellano en caracteres hebreos. Aunque en la órbita de los países musulmanes hubo un desarrollo de escritos halájicos en árabe judío (hasta su desaparición en un periodo tardío, el uso de lenguas distintas del hebreo o el arameo para contenidos halájicos había sido raro en Europa. Según nuestra estimación, este responsum se compuso en el siglo xv y es uno de los conservados de este periodo. El

  7. Signification et vérité dans les écrits philosophico-mathématiques de Jacob Klein

    Directory of Open Access Journals (Sweden)

    Burt C. Hopkins

    2009-02-01

    Full Text Available La manière dont Jacob Klein rend compte de l’historicité propre aux unités de base de la signification dans la pensée de la Grèce ancienne ainsi que de l’Europe moderne est présentée et étudiée en relation au « sens de l'être » dans la pensée phénoménologique heideggerienne et à la conception husserlienne  de la signification ontologique instrumentale du calcul symbolique. Sur le fond des reconstructions kleiniennes des nombres éidétiques dans le Sophiste de Platon et de l’ontologie cartésienne des objets mathématiques indéterminés, deux affirmations se trouvent avancées, à savoir (1 que la composition « artithmologique » de l'être dans le Sophiste de Platon représente un défi par rapport au caractère prétendument fondamental du « sens » dans l’historicité heideggerienne de l’être et  (2 que la constitution de la conceptualité propre aux unités de base du calcul symbolique excède celle de la conception husserlienne de leur « simple » instrumentalité.Jacob Klein’s account of historicity belonging to the basic units of meaning in ancient Greek and modern European thought is presented and examined in relation to the “meaning of Being” in Heidegger’s phenomenological thought and Husserl’s account of symbolic calculus’ instrumental ontological significance. Against the background of Klein’s reconstructions of eidetic numbers in Plato’s Sophist and Descartes’ ontology of indeterminate mathematical objects, two claims are advanced: (1 that Being’s “arithmological” composition in Plato’s Sophist challenges the fundamentality of “meaning” in Heidegger’s historicity of Being and (2 that the constitution of the conceptuality proper to the symbolic calculus’ basic units transcends that of Husserl’s account of their “mere” instrumentality.

  8. Orthodontic camouflage via total arch movement in a Class II with idiopathic condylar resorption

    Directory of Open Access Journals (Sweden)

    Ji-Sung Jang

    2014-01-01

    Full Text Available Idiopathic condylar resorption (ICR, also known as idiopathic condylysis or condylar atrophy, is multifactorial pathology leading to severe mandibular retrognathism. The etiology has been shown to be multifactorial, such as avascular necrosis, traumatic injuries, hormone and autoimmune disease and it is largely difficult to distinguish the exact cause in each individual. In spite of the remarkable morphological alteration, surgical intervention is not readily recruited due to the possibility of recurrence of resorption. In order to restore balanced facial profile and occlusion. In this report, we present a camouflage treatment for skeletal Class II with ICR and facial asymmetry involving total arch movement, for the improvement facial profile and reconstruction of occlusion.

  9. Initial arch wires for alignment of crooked teeth with fixed orthodontic braces.

    LENUS (Irish Health Repository)

    Wang, Yan

    2010-01-01

    The initial arch wire is the first arch wire to be inserted into the fixed appliance at the beginning of orthodontic treatment and is used mainly for correcting crowding and rotations of teeth. With a number of orthodontic arch wires available for initial tooth alignment, it is important to understand which wire is most efficient, as well as which wires cause the least amount of root resorption and pain during the initial aligning stage of treatment.

  10. Classification of the height and flexibility of the medial longitudinal arch of the foot

    OpenAIRE

    2012-01-01

    Abstract Background The risk of developing injuries during standing work may vary between persons with different foot types. High arched and low arched feet, as well as rigid and flexible feet, are considered to have different injury profiles, while those with normal arches may sustain fewer injuries. However, the cut-off values for maximum values (subtalar position during weight-bearing) and range of motion (ROM) values (difference between subtalar neutral and subtalar resting position in a ...

  11. Ahead of his time: Jacob Lipman's 1930 estimate of atmospheric sulfur deposition for the conterminous United States

    Science.gov (United States)

    Landa, Edward R.; Shanley, James B.

    2015-01-01

    A 1936 New Jersey Agricultural Experiment Station Bulletin provided an early quantitative assessment of atmospheric deposition of sulfur for the United States that has been compared in this study with more recent assessments. In the early 20th century, anthropogenic sulfur additions from the atmosphere to the soil by the combustion of fossil fuels were viewed as part of the requisite nutrient supply of crops. Jacob G. Lipman, the founding editor of Soil Science, and his team at Rutgers University, made an inventory of such additions to soils of the conterminous United States during the economic depression of the 1930s as part of a federally funded project looking at nutrient balances in soils. Lipman's team gathered data compiled by the US Bureau of Mines on coal and other fuel consumption by state and calculated the corresponding amounts of sulfur emitted. Their work pioneered a method of assessment that became the norm in the 1970s to 1980s—when acid rain emerged as a national issue. Lipman's estimate of atmospheric sulfur deposition in the 1930 is in reasonable agreement with recent historic reconstructions.

  12. The publication strategies of Jöns Jacob Berzelius (1779-1848): negotiating national and linguistic boundaries in chemistry.

    Science.gov (United States)

    Beckman, Jenny

    2016-04-01

    This article follows the publication strategies of the Swedish chemist Jöns Jacob Berzelius (1779-1848). It focuses on the role of language and translation in Berzelius' efforts to strengthen his own reputation, and that of Swedish science. As an author and editor, Berzelius encouraged the translation of his own works into several languages, while endeavouring to preserve the status of Swedish as a language of scientific publication in the face of French, and increasingly German and English, dominance. Reforming the Transactions of the Royal Swedish Academy of Sciences and launching several new scientific periodicals, Berzelius also attempted to influence the publication practices in other countries. Recent scholarship on the history of scientific publication has drawn attention to the practical difficulties of determining and getting hold of the relevant publications in one's field, the 'malleability' of the journal medium, and the common practice of reprinting and summarising papers published elsewhere. Berzelius' publication strategies highlight translation - time-consuming, unreliable and problematic in terms of authorisation and ownership - as one aspect of the wider problem of communicating across national and linguistic boundaries. Berzelius' struggles with the practicalities of communicating across borders in times of war, the choice of language and its consequences, and national standards of publication, demonstrate the importance of a transnational perspective on the history of scientific publication.

  13. The Foot’s Arch and the Energetics of Human Locomotion

    OpenAIRE

    Stearne, Sarah M.; McDonald, Kirsty A.; Jacqueline A Alderson; Ian North; Oxnard, Charles E; Jonas Rubenson

    2016-01-01

    The energy-sparing spring theory of the foot’s arch has become central to interpretations of the foot’s mechanical function and evolution. Using a novel insole technique that restricted compression of the foot’s longitudinal arch, this study provides the first direct evidence that arch compression/recoil during locomotion contributes to lowering energy cost. Restricting arch compression near maximally (~80%) during moderate-speed (2.7 ms−1) level running increased metabolic cost by + 6.0% (p ...

  14. Out-of-plane free vibration analysis of a cable-arch structure

    Science.gov (United States)

    Kang, H. J.; Zhao, Y. Y.; Zhu, H. P.

    2013-02-01

    Cable-arch structure has been widely used in many long-span structures such as cable roofs and cable-stayed arch bridges, but its dynamics is still not well understood. In this paper, the out-of-plane dynamic behavior of a cable-arch structure is investigated. The equations governing the out-of-plane free vibration of the structure are derived using d'Alembert's principle. A transfer matrix method is used to solve the governing equations and determine the frequencies of the out-of-plane vibration. The theories are then used to study two specific cases: free vibration of a model cable-arch and simulation of an arch erection process. The effects of some key parameters of cable and arch, such as tension of cable and radius, open-angle and shape of arch, are examined. The results indicate that in-plane and spatial cables can largely improve the out-of-plane dynamic behavior of arch structures, which are further verified by analyzing the out-of-plane buckling of cable-arch structures. The present work should be valuable and significant not only for the fundamental research but also engineering design of roofs and bridges.

  15. [Diagnosis and follow-up of reduction of fractures of the zygomatic arch].

    Science.gov (United States)

    Friedrich, R E; Volkenstein, R J

    1994-08-01

    Ultrasound and standard x-ray investigations before and after the reduction of the fractures were performed in 17 patients with zygomatic arch fractures. The ultrasound investigation of the bone surface is recommended as an additional diagnostic tool in the diagnosis and control of the reduction of zygomatic arch fractures. Intraoperative ultrasound imaging under sterile conditions is easy to apply and enables the surgeon to optimise therapeutic results. In 5 cases based on an intraoperative sonogram further reductions of zygomatic arch fractures were carried out. In another referred patient the diagnosis of a zygomatic arch fracture was excluded by ultrasound and confirmed by standard x-ray examinations.

  16. A rare cause of cervical spinal stenosis: posterior arch hypoplasia in a bipartite atlas

    Energy Technology Data Exchange (ETDEWEB)

    Atasoy, C. [Emek, Kirim Caddesi, Ankara (Turkey); Department of Radiology, Ankara University School of Medicine (Turkey); Fitoz, S.; Karan, B.; Erden, I.; Akyar, S. [Department of Radiology, Ankara University School of Medicine (Turkey)

    2002-03-01

    We describe CT and MRI of a previously unreported combination of atlantoaxial anomalies consisting of posterior arch hypoplasia in a bipartite atlas with an os odontoideum, in a 30-year-old woman presenting with neck and left arm pain. MRI showed the os odontoideum, marked stenosis of the spinal canal at the level of the atlas, with cord compression and evidence of myelopathy. CT revealed a bipartite atlas with midline clefts in anterior and posterior arches, thickening in the anterior arch and hypoplasia of the posterior arch with incurving of both hemiarches. Flexion and extension radiographs demonstrated atlantoaxial instability. (orig.)

  17. Elastic responses of underground circular arches considering dynamic soil-structure interaction: A theoretical analysis

    Institute of Scientific and Technical Information of China (English)

    Hai-Long Chen; Feng-Nian Jin; Hua-Lin Fan

    2013-01-01

    Due to the wide applications of arches in underground protective structures,dynamic analysis of circular arches including soil-structure interactions is important.In this paper,an exact solution of the forced vibration of circular arches subjected to subsurface denotation forces is obtained.The dynamic soil-structure interaction is considered with the introduction of an interfacial damping between the structure element and the surrounding soil into the equation of motion.By neglecting the influences of shear,rotary inertia and tangential forces and assuming the arch incompressible,the equations of motion of the buried arches were set up.Analytical solutions of the dynamic responses of the protective arches were deduced by means of modal superposition.Arches with different opening angles,acoustic impedances and rise-span ratios were analyzed to discuss their influences on an arch.The theoretical analysis suggests blast loads for elastic designs and predicts the potential failure modes for buried protective arches.

  18. Earthquake safety assessment of concrete arch and gravity dams

    Institute of Scientific and Technical Information of China (English)

    Lin Gao; Hu Zhiqiang

    2005-01-01

    Based on research studies currently being carried out at Dalian University of Technology, some important aspects for the earthquake safety assessment of concrete dams are reviewed and discussed. First, the rate-dependent behavior of concrete subjected to earthquake loading is examined, emphasizing the properties of concrete under cyclic and biaxial loading conditions. Second, a modified four-parameter Hsieh-Ting-Chen viscoplastic consistency model is developed to simulate the rate-dependent behavior of concrete. The earthquake response of a 278m high arch dam is analyzed, and the results show that the strain-rate effects become noticeable in the inelastic range. Third, a more accurate non-smooth Newton algorithm for the solution of three-dimensional frictional contact problems is developed to study the joint opening effects of arch dams during strong earthquakes. Such effects on two nearly 300m high arch dams have been studied. It was found that the canyon shape has great influence on the magnitude and distribution of the joint opening along the dam axis. Fourth, the scaled boundary finite element method presented by Song and Wolf is employed to study the dam-reservoir-foundation interaction effects of concrete dams. Particular emphases were placed on the variation of foundation stiffness and the anisotropic behavior of the foundation material on the dynamic response of concrete dams. Finally, nonlinear modeling of concrete to study the damage evolution of concrete dams during strong earthquakes is discussed. An elastic-damage mechanics approach for damage prediction of concrete gravity dams is described as an example. These findings are helpful in understanding the dynamic behavior of concrete dams and promoting the improvement of seismic safety assessment methods.

  19. Effects of different medial arch support heights on rearfoot kinematics

    Science.gov (United States)

    Mayer, Frank; Baur, Heiner

    2017-01-01

    Background Foot orthoses are usually assumed to be effective by optimizing mechanically dynamic rearfoot configuration. However, the effect from a foot orthosis on kinematics that has been demonstrated scientifically has only been marginal. The aim of this study was to examine the effect of different heights in medial arch-supported foot orthoses on rear foot motion during gait. Methods Nineteen asymptomatic runners (36±11years, 180±5cm, 79±10kg; 41±22km/week) participated in the study. Trials were recorded at 3.1 mph (5 km/h) on a treadmill. Athletes walked barefoot and with 4 different not customized medial arch-supported foot orthoses of various arch heights (N:0 mm, M:30 mm, H:35 mm, E:40mm). Six infrared cameras and the `Oxford Foot Model´ were used to capture motion. The average stride in each condition was calculated from 50 gait cycles per condition. Eversion excursion and internal tibia rotation were analyzed. Descriptive statistics included calculating the mean ± SD and 95% CIs. Group differences by condition were analyzed by one factor (foot orthoses) repeated measures ANOVA (α = 0.05). Results Eversion excursion revealed the lowest values for N and highest for H (B:4.6°±2.2°; 95% CI [3.1;6.2]/N:4.0°±1.7°; [2.9;5.2]/M:5.2°±2.6°; [3.6;6.8]/H:6.2°±3.3°; [4.0;8.5]/E:5.1°±3.5°; [2.8;7.5]) (p>0.05). Range of internal tibia rotation was lowest with orthosis H and highest with E (B:13.3°±3.2°; 95% CI [11.0;15.6]/N:14.5°±7.2°; [9.2;19.6]/M:13.8°±5.0°; [10.8;16.8]/H:12.3°±4.3°; [9.0;15.6]/E:14.9°±5.0°; [11.5;18.3]) (p>0.05). Differences between conditions were small and the intrasubject variation high. Conclusion Our results indicate that different arch support heights have no systematic effect on eversion excursion or the range of internal tibia rotation and therefore might not exert a crucial influence on rear foot alignment during gait. PMID:28257426

  20. On monolithic stability and reinforcement analysis of high arch dams

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Monolithic stability safety and reinforcement based on monolithic stability are very important for arch dam design.In this paper,the issue is addressed based on deformation reinforcement theory.In this approach,plastic complementary energy norm can be taken as safety Index for monolithic stability.According to deformation reinforcement theory,the areas where unbalanced force exists require reinforcement,and the required reinforcement forces are just the unbalanced forces with opposite direction.Results show that areas with unbalanced force mainly concentrate in dam-toes,dam-heels and faults.

  1. A comparative study of inter-abutment distance of dies made from full arch dual-arch impression trays with those made from full arch stock trays: An in vitro study

    OpenAIRE

    Reddy Jagan; Prashanti E; Kumar G; Suresh Sajjan M; Mathew Xavier

    2009-01-01

    Objectives: The dual-arch impression technique is convenient in that it makes the required maxillary and mandibular impressions, as well as the inter-occlusal record in one procedure. The accuracy of inter-abutment distance in dies fabricated from dual-arch impression technique remains in question because there is little information available in the literature. Materials and Methods: This study was conducted to evaluate the accuracy of inter-abutment distance in dies obtained from full ar...

  2. Aortic Arch Atherosclerosis——An Important Potential Source Of Cerebral Embolic Stroke

    Institute of Scientific and Technical Information of China (English)

    Yi Guo; Shao wen Zhang; Si Chen

    2000-01-01

    Background and purpose: Recent years with use of transesophageal echography renew awareness of aortic atherosclerosis. The purpose of this study was to determine the prevalence, clinical significance, and embolic potential of thoracic aortic plaque in patients with cerebral emblism; and further study the correlation aortic plaque with carotid or heart disease. Method: 49 consecutive patients with cerebral embolism was included in this sutdy. We uscd TEE to evaluated potential source of emboli in aortic arch and heart, and duplex in carotid artery. A atherosclerotic lesion of thoracic aorta was defined as normal(O); mild plaque (1); moderate plaque (2); protruding plaque or mobile plaque (3). Result: 31(63%) patients showed evidence of AAA; 7 (14.3%) patients had mild AAA, 9 (18.4%) patients had moderate AAA and 15 (32.7%) patients had severe AAA, In these 15 patients 11 patients neither severe ICAA or embolic heart disease, the AAA may be responsible to the cerebral embolism; 33 patients had internal carotid arterial atherosclerosis(ICAA), 9 patients had embolic heart disease; Age, ICAA had significant correlated with aortic plaque. Conclusion: Aortic atherosclerosis is common in cerebral embolism. Aortic plaque might be not only responsible for some unexplained embolic event, but also for some of the embolic stroke in the group of patient do have carotid artery or heart disease. Age might be important risk factor for the development of atherosclerotic lesion in the thoracic aorta.

  3. Behaviour of Steel Arch Stabilized by a Textile Membrane

    Science.gov (United States)

    Svoboda, O.; Machacek, J.

    2015-11-01

    Behaviour of the slender steel arch supporting textile membranes in a membrane structure with respect to in-plane and out-of plane stability is investigated in the paper. In the last decades the textile membranes have been widely used to cover both common and exclusive structures due to progress in new membrane materials with eminent properties. Nevertheless, complex analysis of such membranes in interaction with steel structure (carbon/stainless steel perimeter or supporting elements) is rather demanding, even with specialized software. Laboratory model of a large membrane structure simulating a shelter roof of a concert stage was tested and the resulting stress/deflection values are presented. The model of a reasonable size was provided with prestressed membrane of PVC coated polyester fabric Ferrari® Précontraint 702S and tested under various loadings. The supporting steel structure consisted of two steel arch tubes from S355 grade steel and perimeter prestressed cables. The stability behaviour of the inner tube was the primary interest of the investigation. The SOFiSTiK software was used to analyse the structural behaviour in 3D. Numerical non-linear analysis of deflections and internal forces of the structure under symmetrical and asymmetrical loadings covers various membrane prestressing and specific boundary conditions. The numerical results are validated using test results. Finally, the preliminary recommendations for appropriate numerical modelling and stability design of the supporting structure are presented.

  4. archAR: an archaeological augmented reality experience

    Science.gov (United States)

    Wiley, Bridgette; Schulze, Jürgen P.

    2015-03-01

    We present an application for Android phones or tablets called "archAR" that uses augmented reality as an alternative, portable way of viewing archaeological information from UCSD's Levantine Archaeology Laboratory. archAR provides a unique experience of flying through an archaeological dig site in the Levantine area and exploring the artifacts uncovered there. Using a Google Nexus tablet and Qualcomm's Vuforia API, we use an image target as a map and overlay a three-dimensional model of the dig site onto it, augmenting reality such that we are able to interact with the plotted artifacts. The user can physically move the Android device around the image target and see the dig site model from any perspective. The user can also move the device closer to the model in order to "zoom" into the view of a particular section of the model and its associated artifacts. This is especially useful, as the dig site model and the collection of artifacts are very detailed. The artifacts are plotted as points, colored by type. The user can touch the virtual points to trigger a popup information window that contains details of the artifact, such as photographs, material descriptions, and more.

  5. A radiological study on lumbar spondylolisthesis with intact neural arch

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Myung Ju; Suh, Young Jun; Joe, Seong Jeh; Yoon, Jong Sup [Han-Gang Sung-Shim Hospital, Seoul (Korea, Republic of)

    1980-12-15

    The purpose of this paper is to evaluate and analyze the radiological findings of 13 cases of lumbar spondylolisthesis with intact neural arch at Han-Gang Sung- Shim Hospital during period from Jan. 1975 to June 1980. 1. The age distribution of the patients varied from 31 to 83 years old. The average of the age was 53 years old. 12 patients were female and only one patient was male. 2. All cases revealed anterior slipping of the L4 body on the L5 body, of which degree was classified by Meyerding's method, first degree in 12 patients and second degree in one patient. 3. The angle between the pedicle and inferior articular facet of affected vertebra was measured by Junghann's method. The average of angle was 123 degree. 4. Of 13 cases, 2 cases who had neural compression caused by dislocation of the vertebral bodies and intrusion of lamina and arthritic facets into stenotic spinal canal treated by laminar decompression including foraminotomy. Good results were obtained. 5. The secondary degenerative change of the vertebra was considered to be the cause of the spondylolisthesis with intact neural arch.

  6. Design and construction of prestressed arch using plastic shoppers waste

    Directory of Open Access Journals (Sweden)

    Ali Khan, S.

    2012-12-01

    Full Text Available Since the development of plastic in the last century, being versitile it has become very popular for diversified uses. The problem appears when these plastics, particularly shoppers are disposed as waste. The current reuse and recycling rates for the plastic shoppers waste are very low. Construction Industry has a great potential for the reuse of shoppers waste. Shoppers waste has been compressed to fabricate compressed shoppers waste (CSW blocks. This study is related to an innovative reuse of CSW-blocks for the construction of prestressed structural arch. This paper is dedicated to the design and construction of structural arch using shoppers waste as a material.

    Desde su desarrollo durante el siglo pasado y debido a su versatilidad, el plástico se ha hecho ubicuo en la sociedad actual. Los problemas surgen cuando este material, sobre todo cuando conforma bienes de consumo, se desecha. Actualmente, los índices de valorización y reciclado de residuos plásticos de origen doméstico son muy bajos. El sector de la construcción tiene una enorme potencial para reutilizar este tipo de residuos, que se pueden comprimir para fabricar bloques. Este artículo presenta un uso innovador de los bloques de residuos plásticos: la construcción de un arco estructural pretesado. Describe el proyecto y la ejecución de un arco estructural construido con estos materiales de desecho.

  7. Building problem solving environments with the arches framework

    Energy Technology Data Exchange (ETDEWEB)

    Debardeleben, Nathan [Los Alamos National Laboratory; Sass, Ron [U NORTH CAROLINA; Stanzione, Jr., Daniel [ASU; Ligon, Ill, Walter [CLEMSON UNIV

    2009-01-01

    The computational problems that scientists face are rapidly escalating in size and scope. Moreover, the computer systems used to solve these problems are becoming significantly more complex than the familiar, well-understood sequential model on their desktops. While it is possible to re-train scientists to use emerging high-performance computing (HPC) models, it is much more effective to provide them with a higher-level programming environment that has been specialized to their particular domain. By fostering interaction between HPC specialists and the domain scientists, problem-solving environments (PSEs) provide a collaborative environment. A PSE environment allows scientists to focus on expressing their computational problem while the PSE and associated tools support mapping that domain-specific problem to a high-performance computing system. This article describes Arches, an object-oriented framework for building domain-specific PSEs. The framework was designed to support a wide range of problem domains and to be extensible to support very different high-performance computing targets. To demonstrate this flexibility, two PSEs have been developed from the Arches framework to solve problem in two different domains and target very different computing platforms. The Coven PSE supports parallel applications that require large-scale parallelism found in cost-effective Beowulf clusters. In contrast, RCADE targets FPGA-based reconfigurable computing and was originally designed to aid NASA Earth scientists studying satellite instrument data.

  8. Deformation reinforcement theory and its application to high arch dams

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    In this paper,the deformation reinforcement theory(DRT) proposed by the authors is elaborated with a new definition of instability that an elasto-plastic structure is not stable if it cannot satisfy simultaneously equilibrium condition,kinematical admissibility and constitutive equations under the prescribed loading.Starting from the definition,a proof is established to the principle of minimum plastic complementary energy for failured structures.It is revealed that the principle of mini-mum plastic complementary energy results in relaxed constitutive equations,especially,yield conditions.It is demonstrated with case studies that many key issues in arch dam design,e.g.,global stability,dam-toe reinforcement,dam-toe cracking,dam-abut-ment reinforcement,can be well solved within the framework of the deformation reinforcement theory.The structural global stability can be described by the curve of the plastic complementary energy vs overloading factor.The unbalanced-forces obtained by elasto-plastic FEM can be used as the basis of analysis of global stability,dam-heel cracking,dam-toe anchorage and reinforcement of faults of high arch dams and their foundations.

  9. Iconography and Politics in South Africa: the representation of Nelson Mandela, Thabo Mbeki and Jacob Zuma in cartoons of Zapiro

    Directory of Open Access Journals (Sweden)

    Renata de Paula dos Santos

    2014-12-01

    Full Text Available Mandela’s victory in the 1994 elections in South Africa is a reference point for South African history and represented the transition from apartheid to multiracial democracy. Since then Nelson Mandela (1994-1999, Thabo Mbeki (1999-2008 and Jacob Zuma (2009 - current, occupied the post of president of the country and led, each in its own way, the new direction of the country. During the nearly twenty years of multiracial democracy, one in particular cartoonist, Jonathan Shapiro, popularly known by the pseudonym Zapiro, portrayed the everyday life of this story. In this sense, the objective of this research is to analyze how Zapiro portrayed the political and social aspects, as well as the psychological characteristics of each of the three postapartheid presidents and which social representations are formed from their cartoon production. The choice of Zapiro explained by openly declared his opposition to apartheid and also for being the best known outside South African cartoonist. We elected to cartoon as an object of study because it is an iconographic object constituted by communicative humor, which adds to its constitution arguments transgression of the established order, enabling an analysis of South African history through a critical bias. As methods for the development of the work, we decided to gather historical research, the literature search and analysis of cartooon speech. Among the theoretical frameworks stand out Magnoli (1998, 2009, Jonge (1991 and Carlin (2009 in the South African question; reflections about social representations, we resort to Moscovici (2011 and Jodelet (1993, in the field the cartoon and humor, the references are Miani (2005; 2012, Romualdo (2000 and Eco (1989. With the completion of the analysis, we observed that Zapiro acts in different ways in the construction of the representation of each of the presidents in question and that the cartoonist presents Mandela as a competent leader marked by heroism and

  10. Clinical Advantages and Limitations of Monolithic Zirconia Restorations Full Arch Implant Supported Reconstruction: Case Series

    Directory of Open Access Journals (Sweden)

    Joao Carames

    2015-01-01

    Full Text Available Purpose. The purpose of this retrospective case series is to evaluate the clinical advantages and limitations of monolithic zirconia restorations for full arch implant supported restorations and report the rate of complications up to 2 years after insertion. Materials and Methods. Fourteen patients received implant placement for monolithic zirconia full arch reconstructions. Four implants were placed in seven arches, eleven arches received six implants, two arches received seven implants, two arches received eight implants, and one arch received nine implants. Results. No implant failures or complications were reported for an implant survival rate of 100% with follow-up ranging from 3 to 24 months. Conclusions. Monolithic zirconia CAD-/CAM-milled framework restorations are a treatment option for full arch restorations over implants, showing a 96% success rate in the present study. Some of the benefits are accuracy, reduced veneering porcelain, and minimal occlusal adjustments. The outcome of the present study showed high success in function, aesthetics, phonetics, and high patient satisfaction.

  11. High- compared to low-arched athletes exhibit smaller knee abduction moments in walking and running.

    Science.gov (United States)

    Powell, Douglas W; Andrews, Samantha; Stickley, Cris; Williams, D S Blaise

    2016-12-01

    High- (HA) and low-arched athletes (LA) experience distinct injury patterns. These injuries are the result of the interaction of structure and biomechanics. A suggested mechanism of patellofemoral pain pertains to frontal plane knee moments which may be exaggerated in LA athletes. We hypothesize that LA athletes will exhibit greater peak knee abduction moments than high-arched athletes.

  12. "Roller coaster maneuver via lateral orbital approach" for reduction of isolated zygomatic arch fractures.

    Science.gov (United States)

    Pilanci, Ozgur; Basaran, Karaca; Datli, Asli; Kuvat, Samet Vasfi

    2013-11-01

    Numerous techniques have been reported for the reduction of zygomatic arch fractures. In this article, we aimed to describe a technique we named as "roller coaster maneuver via lateral orbital approach" to closed reduction of the isolated-type zygomatic arch fractures. Surgical outcomes of 14 patients treated with this method were outlined.

  13. The effect of minimal shoes on arch structure and intrinsic foot muscle strength

    Directory of Open Access Journals (Sweden)

    Elizabeth E. Miller

    2014-06-01

    Conclusion: These results suggest that endurance running in minimal support footwear with 4 mm offset or less makes greater use of the spring-like function of the longitudinal arch, thus leading to greater demands on the intrinsic muscles that support the arch, thereby strengthening the foot.

  14. 49 CFR 230.61 - Arch tubes, water bar tubes, circulators and thermic siphons.

    Science.gov (United States)

    2010-10-01

    ... (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Washing Boilers § 230.61 Arch tubes, water bar tubes, circulators and thermic siphons. (a) Frequency of cleaning. Each time the boiler is washed, arch tubes...

  15. [The value of ultrasonography in the diagnosis of zygomatic arch fractures].

    Science.gov (United States)

    Friedrich, R E; Volkenstein, R J

    1991-01-01

    In 15 cases ultrasonograms were used to verify the result of a zygomatic fracture reduction and were correlated to conventional x-ray films. Both the pre- and postoperative ultrasonograms demonstrated all fractures of the zygomatic arch. Ultrasonographic imaging of the non-exposed bone surfaces enables the operator to monitor the reduction of zygomatic arch fractures intraoperatively, and thus optimize the treatment results.

  16. Cephalic arch stenosis in autogenous brachiocephalic hemodialysis fistulas: results of cutting balloon angioplasty

    DEFF Research Database (Denmark)

    Heerwagen, Søren Thorup; Lönn, Lars; Schroeder, Torben V;

    2010-01-01

    Cephalic arch stenosis is a known cause of hemodialysis access failure in patients with brachiocephalic fistulas (BCFs). Outcomes of endovascular treatment are affected by resistance of the stenosis to balloon dilation, a high vein rupture rate and the development of early restenosis. The purpose...... of this retrospective study was to report outcomes after cutting balloon angioplasty (CBA) of cephalic arch stenosis....

  17. Relation of Gothic arch apex to dentist-assisted centric relation.

    Science.gov (United States)

    Myers, M; Dziejma, R; Goldberg, J; Ross, R; Sharry, J

    1980-07-01

    These data suggest that the widely held belief that thumb pressure can position the mandible consistently more posterior than the position indicated by the Gothic arch apex is unfounded. Furthermore, this study provides no evidence to support the contention that the dentist-assisted jaw relation is more reproducible than the relation indicated by the Gothic arch apex.

  18. Dynamic stability analysis of circular arch subjected to follower forces with small disturbances; Judo kaju wo ukeru enkei arch no yuran ni yoru doteki kyodo to anteisei kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Fukuchi, N.; Okada, K. [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Hirano, Y. [Sumitomo Heavy Industries, Ltd., Tokyo (Japan)

    1997-09-04

    This paper describes the deformation and dynamic stability of circular arch subjected to follower forces in a submerged membrane type marine structure reinforced by arch frames. Governing equations for finite deformations of the circular arch subjected to follower forces are introduced using an embedded curve coordinate, which are formulated by applying Galerkin method. In addition, equations of motion due to small disturbances under given condition of loading are introduced. Based on these equations, dynamic stability of the arch is analyzed by means of Runnge-Kutta-Gill method, to clarify the relationship between disturbances and instability regions and the resulting phenomena. Near the boundary regions of stability, both amplitude and cycle of deformation are greatly affected by the amplitude of disturbances. The dynamic instability is governed by the inverse symmetry primary mode with minimum characteristic frequency which is specific for the circular arch. The dynamic stability has high parameter dependency, and the instability regions have a complicated shapes. Although flattened arch has a smaller static critical load, it provides the dynamic stability against the disturbance. 5 refs., 10 figs.

  19. A shared role for sonic hedgehog signalling in patterning chondrichthyan gill arch appendages and tetrapod limbs.

    Science.gov (United States)

    Gillis, J Andrew; Hall, Brian K

    2016-04-15

    Chondrichthyans (sharks, skates, rays and holocephalans) possess paired appendages that project laterally from their gill arches, known as branchial rays. This led Carl Gegenbaur to propose that paired fins (and hence tetrapod limbs) originally evolved via transformation of gill arches. Tetrapod limbs are patterned by asonic hedgehog(Shh)-expressing signalling centre known as the zone of polarising activity, which establishes the anteroposterior axis of the limb bud and maintains proliferative expansion of limb endoskeletal progenitors. Here, we use loss-of-function, label-retention and fate-mapping approaches in the little skate to demonstrate that Shh secretion from a signalling centre in the developing gill arches establishes gill arch anteroposterior polarity and maintains the proliferative expansion of branchial ray endoskeletal progenitor cells. These findings highlight striking parallels in the axial patterning mechanisms employed by chondrichthyan branchial rays and paired fins/limbs, and provide mechanistic insight into the anatomical foundation of Gegenbaur's gill arch hypothesis.

  20. Automatic dental arch detection and panoramic image synthesis from CT images.

    Science.gov (United States)

    Sa-Ing, Vera; Wangkaoom, Kongyot; Thongvigitmanee, Saowapak S

    2013-01-01

    Due to accurate 3D information, computed tomography (CT), especially cone-beam CT or dental CT, has been widely used for diagnosis and treatment planning in dentistry. Axial images acquired from both medical and dental CT scanners can generate synthetic panoramic images similar to typical 2D panoramic radiographs. However, the conventional way to reconstruct the simulated panoramic images is to manually draw the dental arch on axial images. In this paper, we propose a new fast algorithm for automatic detection of the dental arch. Once the dental arch is computed, a series of synthetic panoramic images as well as a ray-sum panoramic image can be automatically generated. We have tested the proposed algorithm on 120 CT axial images and all of them can provide the decent estimate of the dental arch. The results show that our proposed algorithm can mostly detect the correct dental arch.

  1. EFFECT OF HOTZ PLATE APPLIANE TO MAXILLARY ARCH DEVELOPMENT PATIENTS WITH CLEFT LIP AND PALATE

    Directory of Open Access Journals (Sweden)

    Edy Machmud

    2015-06-01

    Full Text Available The purpose of this study was to analyze the effect of hotz plate appliance to maxillary arch development of complete unilateral cleft lip and palate patient. The subjects were divided into two groups. The first group consisted of 6 patients, aged under two years with hotz appliance, recruited from Hasan Sadikin Hospital Bandung, and the second group, as control group, consisted of 6 patients, aged under two years, without hotz appliance, recruited from Haji Hosiptal Makassar. It was showed that in group with hotz plate appliance, no difference found on the size of anterior maxillary arch and minor maxillary arch. On the other hand, in the control group, minor maxillary arch was longer than major maxillary arch. It was concluded that hotz plate appliances affected that palatal development of patient with complete unilateral cleft lip and palate.

  2. File list: NoD.Emb.05.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available NoD.Emb.05.AllAg.Maxillary_arch_junction mm9 No description Embryo Maxillary arch j...unction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/NoD.Emb.05.AllAg.Maxillary_arch_junction.bed ...

  3. File list: NoD.Emb.10.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available NoD.Emb.10.AllAg.Maxillary_arch_junction mm9 No description Embryo Maxillary arch j...unction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/NoD.Emb.10.AllAg.Maxillary_arch_junction.bed ...

  4. File list: NoD.Emb.50.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available NoD.Emb.50.AllAg.Maxillary_arch_junction mm9 No description Embryo Maxillary arch j...unction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/NoD.Emb.50.AllAg.Maxillary_arch_junction.bed ...

  5. File list: InP.Emb.20.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available InP.Emb.20.AllAg.Maxillary_arch_junction mm9 Input control Embryo Maxillary arch ju...nction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/InP.Emb.20.AllAg.Maxillary_arch_junction.bed ...

  6. File list: InP.Emb.05.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available InP.Emb.05.AllAg.Maxillary_arch_junction mm9 Input control Embryo Maxillary arch ju...nction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/InP.Emb.05.AllAg.Maxillary_arch_junction.bed ...

  7. File list: InP.Emb.50.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available InP.Emb.50.AllAg.Maxillary_arch_junction mm9 Input control Embryo Maxillary arch ju...nction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/InP.Emb.50.AllAg.Maxillary_arch_junction.bed ...

  8. File list: InP.Emb.10.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available InP.Emb.10.AllAg.Maxillary_arch_junction mm9 Input control Embryo Maxillary arch ju...nction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/InP.Emb.10.AllAg.Maxillary_arch_junction.bed ...

  9. File list: NoD.Emb.20.AllAg.Maxillary_arch_junction [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available NoD.Emb.20.AllAg.Maxillary_arch_junction mm9 No description Embryo Maxillary arch j...unction http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/NoD.Emb.20.AllAg.Maxillary_arch_junction.bed ...

  10. Frontal plane multi-segment foot kinematics in high- and low-arched females during dynamic loading tasks.

    Science.gov (United States)

    Powell, Douglas W; Long, Benjamin; Milner, Clare E; Zhang, Songning

    2011-02-01

    The functions of the medial longitudinal arch have been the focus of much research in recent years. Several studies have shown kinematic differences between high- and low-arched runners. No literature currently compares the inter-segmental foot motion of high- and low-arched recreational athletes. The purpose of this study was to examine inter-segmental foot motion in the frontal plane during dynamic loading activities in high- and low-arched female athletes. Inter-segmental foot motions were examined in 10 high- and 10 low-arched female recreational athletes. Subjects performed five barefooted trials in each of the following randomized movements: walking, running, downward stepping and landing. Three-dimensional kinematic data were recorded. High-arched athletes had smaller peak ankle eversion angles in walking, running and downward stepping than low-arched athletes. At the rear-midfoot joint high-arched athletes reached peak eversion later in walking and downward stepping than the low-arched athletes. The high-arched athletes had smaller peak mid-forefoot eversion angles in walking, running and downward stepping than the low-arched athletes. The current findings show that differences in foot kinematics between the high- and low-arched athletes were in position and not range of motion within the foot.

  11. The Evolution of Protoplanetary Discs in the Arches Cluster

    CERN Document Server

    Olczak, C; Harfst, S; Pfalzner, S; Zwart, S Portegies

    2012-01-01

    Most stars form in a cluster environment. These stars are initially surrounded by discs from which potentially planetary systems form. Of all cluster environments starburst clusters are probably the most hostile for planetary systems in our Galaxy. The intense stellar radiation and extreme density favour rapid destruction of circumstellar discs via photoevaporation and stellar encounters. Evolving a virialized model of the Arches cluster in the Galactic tidal field we investigate the effect of stellar encounters on circumstellar discs in a prototypical starburst cluster. Despite its proximity to the deep gravitational potential of the Galactic centre only a moderate fraction of members escapes to form an extended pair of tidal tails. Our simulations show that encounters destroy one third of the circumstellar discs in the cluster core within the first 2.5 Myr of evolution, preferentially affecting the least and most massive stars. A small fraction of these events causes rapid ejection and the formation of a we...

  12. Variation in the Branching Pattern of the Superficial Palmar Arch

    Directory of Open Access Journals (Sweden)

    Sumalatha S

    2016-05-01

    Full Text Available In this article we describe a rare variation in the superficial palmar arch (SPA encountered during routine cadaveric dissection. SPA was formed by the superficial branches of ulnar and radial arteries which provided a proper digital branch to the ulnar side of the little finger and three common palmar digital branches to the medial four digits. Additionally a first common digital artery was seen to emerge from the radial side of SPA which further divided into the arteria princeps pollicis and arteria radialis indicis. We also found a small communicating branch between the arteria princeps pollicis and the radial artery in the anatomical snuff box. Such arterial variations in the palm due to alteration in the developmental sequence remains a crucial issue in the reconstructive hand surgeries, especially while dealing with the innovative microsurgical procedures, where these varied patterns act as pivotal points around which successful results of various advanced surgical procedures revolve.

  13. Constructing Active Architectures in the ArchWare ADL

    CERN Document Server

    Morrison, Ron; Balasubramaniam, Dharini; Mickan, Kath; Oquendo, Flavio; Cîmpan, Sorana; Warboys, Brian; Snowdon, Bob; Greenwood, Mark

    2010-01-01

    Software that cannot change is condemned to atrophy: it cannot accommodate the constant revision and re-negotiation of its business goals nor intercept the potential of new technology. To accommodate change in such systems we have defined an active software architecture to be: dynamic in that the structure and cardinality of the components and interactions are not statically known; updatable in that components can be replaced dynamically; and evolvable in that it permits its executing specification to be changed. Here we describe the facilities of the ArchWare architecture description language (ADL) for specifying active architectures. The contribution of the work is the unique combination of concepts including: a {\\pi}-calculus based communication and expression language for specifying executable architectures; hyper-code as an underlying representation of system execution; a decomposition operator to break up and introspect on executing systems; and structural reflection for creating new components and bind...

  14. Modelos ARCH, GARCH y EGARCH: aplicaciones a series financieras

    Directory of Open Access Journals (Sweden)

    Cepeda Cuervo Edilberto

    2008-08-01

    Full Text Available En este artículo se incluye una descripción de los modelos
    ARCH, GARCH y EGARCH, y de los procesos de estimación de sus
    parámetros usando máxima verosimilitud. Se propone un modelo
    alternativo para el análisis de series financieras y se estudian
    las series de precios y de retornos de las acciones de
    Gillette. La selección de modelos usando los criterios AIC y
    BIC permite concluir que, de los modelos considerados el
    GARCH(1,2 es el que mejor explica el comportamiento de los
    precios de las acciones y el EGARCH(2,1 es el que mejor
    explica la serie de los retornos.

  15. Parallel computation of seismic analysis of high arch dam

    Institute of Scientific and Technical Information of China (English)

    Chen Houqun; Ma Huaifa; Tu Jin; Cheng Guangqing; Tang Juzhen

    2008-01-01

    Parallel computation programs are developed for three-dimensional meso-mechanics analysis of fully-graded dam concrete and seismic response analysis of high arch dams (ADs), based on the Parallel Finite Element Program Generator (PFEPG). The computational algorithms of the numerical simulation of the meso-structure of concrete specimens were studied. Taking into account damage evolution, static preload, strain rate effect, and the heterogeneity of the meso-structure of dam concrete, the fracture processes of damage evolution and configuration of the cracks can be directly simulated. In the seismic response analysis of ADs, all the following factors are involved, such as the nonlinear contact due to the opening and slipping of the contraction joints, energy dispersion of the far-field foundation, dynamic interactions of the dam-foundation-reservoir system, and the combining effects of seismic action with all static loads. The correctness, reliability and efficiency of the two parallel computational programs are verified with practical illustrations.

  16. Explaining operational modal analysis with data from an arch bridge

    Science.gov (United States)

    Magalhães, Filipe; Cunha, Álvaro

    2011-07-01

    This tutorial paper aims to introduce the topic of operational modal analysis to non-specialists on the subject. First of all, it is stressed the relevance of this experimental technique particularly in the assessment of important civil infrastructure. Then, after a synthesis of required theoretical background, three of the most powerful algorithms for output-only modal identification are presented. The several steps of these identification procedures are illustrated with the processing of data collected on a concrete arch bridge with a span of 280 m. As the use of operational modal analysis in the context of structural health monitoring is a subject under active research, this theme is also introduced and briefly exemplified with data continuously recorded at the same bridge.

  17. Monitoring Soil Erosion on a Burned Site in the Mojave-Great Basin Transition Zone: Final Report for the Jacob Fire Site

    Energy Technology Data Exchange (ETDEWEB)

    Miller, Julianne [DRI; Etyemezian, Vic [DRI; Cablk, Mary E. [DRI; Shillito, Rose [DRI; Shafer, David [DOE Grand Junction, Colorado

    2013-06-01

    A historic return interval of 100 years for large fires in the U.S. southwestern deserts is being replaced by one where fires may reoccur as frequently as every 20 to 30 years. The shortened return interval, which translates to an increase in fires, has implications for management of Soil Corrective Action Units (CAUs) and Corrective Action Sites (CASs) for which the Department of Energy, National Nuclear Security Administration Nevada Field Office has responsibility. A series of studies was initiated at uncontaminated analog sites to better understand the possible impacts of erosion and transport by wind and water should contaminated soil sites burn. The first of these studies was undertaken at the Jacob Fire site approximately 12 kilometers (7.5 miles) north of Hiko, Nevada. A lightning-caused fire burned approximately 200 hectares during August 6-8, 2008. The site is representative of a transition between Mojave and Great Basin desert ecoregions on the Nevada National Security Site (NNSS), where the largest number of Soil CAUs/CASs are located. The area that burned at the Jacob Fire site was primarily a Coleogyne ramosissima (blackbrush) and Ephedra nevadensis (Mormon tea) community, also an abundant shrub assemblage in the similar transition zone on the NNSS. This report summarizes three years of measurements after the fire. Seven measurement campaigns at the Jacob Fire site were completed. Measurements were made on burned ridge (upland) and drainage sites, and on burned and unburned sites beneath and between vegetation. A Portable In-Situ Wind Erosion Lab (PI-SWERL) was used to estimate emissions of suspended particles at different wind speeds. Context for these measurements was provided through a meteorological tower that was installed at the Jacob Fire site to obtain local, relevant environmental parameters. Filter samples, collected from the exhaust of the PI-SWERL during measurements, were analyzed for chemical composition. Runoff and water erosion were

  18. Jaw muscle pain and its effect on gothic arch tracings.

    Science.gov (United States)

    Obrez, A; Stohler, C S

    1996-04-01

    Perceived changes in occlusion and decreased range of motion are often expressed by patients with masticatory muscle pain. The adverse loading of craniomandibular tissues that results from an inadequate maxillomandibular relationship in combination with the coexisting dysfunction is widely regarded as the cause of pain. This study was designed to test whether pain can cause significant changes in position of the mandible and therefore form the basis for any perceived changes in the maxillomandibular relationship. A second objective was to determine whether pain can cause changes in the mandibular range of motion. Five subjects who rated pain intensity on a visual analog scale were used in a single-blind, randomized, repeated-measures study design. Tonic muscle pain was induced by infusion of 5% hypertonic saline solution into the central portion of the superficial masseter muscle. Isotonic saline solution was used as a control, with subjects blinded to the type of substance given. The effect of pain on the position of the apex of the gothic arch tracing, the direction of the lateral mandibular border movements, and the mandibular range of motion was studied in a horizontal plane with minimal occlusal separation. Pain significantly affected the position of the apex of the gothic arch tracing in anterior (F = 11.46, p = 0.03) and transverse (F = 35.0, p = 0.004) directions. Similarly, pain affected the orientation of the mandibular lateral border movements (F = 12.44, p = 0.02) and their magnitude (F = 14.97, p = 0.01). All pain-induced effects proved to be reversible. The observed effect of pain can explain the perceived change of bite that is frequently noted by patients with orofacial pain. This study provided evidence of an alternative causal relationship between pain and changes in occlusal relationship and questions occlusal therapy as treatment, directed toward the elimination of the underlying cause in patients with masticatory muscle pain.

  19. Marc Jacobs and Peter Scholliers (ed., Eating out in Europe: picnics, gourmet dining and snacks since the late eighteenth century

    Directory of Open Access Journals (Sweden)

    Jannike W. Hegnes

    2005-05-01

    Full Text Available Is there a connection between coarse bread eaten during harvesting in 1840, a cordial meal at a Berner Inn in 1870, the robust food of a factory’s canteen in 1900, a sophisticated dinner at a three-star restaurant in 1950, and a hamburger consumed outside a school gate in 1990 (p. 1? They are all examples of meals eaten outside the home, in Europe, during the last to centuries. In the book Eating Out in Europe the editors Marc Jacobs and Peter Scholliers want to give an overview and to demon...

  20. Mmatshilo Motsei 2007: The kanga and the kangaroo court – reflections on the rape trial of Jacob Zuma. Jacana, Cape Town

    OpenAIRE

    Simphiwe Sesanti

    2011-01-01

    Contemporary interpretations of African culture are responsible for objectifying women. This is Mmatshilo Motsei’s conclusion after profound reflections on the implications of Jacob Zuma’s rape trial in which he was accused of raping the daughter of his comrade who died in exile.
    In the trial Zuma claimed that the sexual encounter was consensual. When explaining his submission to passion and failing to use a condom, he said that had he left the woman sexually unfulfilled, in Zulu c...

  1. ARCH-M模型的经验似然估计%Empirical likelihood estimation for ARCH-M models

    Institute of Scientific and Technical Information of China (English)

    孙岩; 李元

    2012-01-01

    This paper deals with the metric of risk aversion.Test statistics are constructed by the empirical likelihood method.Under mild conditions,asymptotic x2 distributions of test statistics are obtained,based on which confidence regions for risk aversion are given.Simulations show that the empirical likelihood method behaves well.%基于ARCH-M模型研究市场总体风险厌恶的度量问题.首先应用经验似然方法构造了检验统计量,并在一定的条件下,证明了所构造的统计量的渐近分布为卡方分布,在此基础上构造了市场总体风险厌恶的置信区间.模拟结果表明,经验似然方法表现良好.

  2. Maxillary Arch Dimension Changes of 3-5 Years Old Filipino Children

    Directory of Open Access Journals (Sweden)

    Abdol Hamid Zafarmand

    2014-11-01

    Full Text Available Background: The purpose of this study was to assess the dental arch dimensions in primary dentition of 3-5 years old Filipino children and determining the existence of sexual dimorphism.Materials and Methods: In this descriptive study, 60 Filipino preschool children aged 3-5 years old were selected from Manila city. Study casts were used for measurements of 3 arch dimensions: bicanine width, bimolar width, and arch length. The analyses were performed to compare values within age-groups and within gender-groups, besides reporting mean and standard deviations. The data were subjected to One-way ANOVA and Student t-test.Results: Significant differences were observed regarding dental arch dimensions among different ages and genders (p<0.05. Comparison between genders showed a statistically significant difference in bicanine width at the age of 4 (p=0.04, in bimolar width at age of 5 (p=0.006, and in arch length at age of 4 (p=0.03 and 5 (p=0.02. Differences within male group for different ages showed only arch length dimension was statistically significant (p=0.021. In females, however the comparison between age-groups also revealed a statistically significant difference in bicanine (p= 0.016 and bimolar widths (p=0.027 dimensions.Conclusion: The present study showed that dental arch dimensions, vary among different ages and genders of children. It also showed that a sexual dimorphism does exist between the gender groups.

  3. The Role of Arch Compression and Metatarsophalangeal Joint Dynamics in Modulating Plantar Fascia Strain in Running.

    Directory of Open Access Journals (Sweden)

    Kirsty A McDonald

    Full Text Available Elastic energy returned from passive-elastic structures of the lower limb is fundamental in lowering the mechanical demand on muscles during running. The purpose of this study was to investigate the two length-modulating mechanisms of the plantar fascia, namely medial longitudinal arch compression and metatarsophalangeal joint (MPJ excursion, and to determine how these mechanisms modulate strain, and thus elastic energy storage/return of the plantar fascia during running. Eighteen runners (9 forefoot and 9 rearfoot strike performed three treadmill running trials; unrestricted shod, shod with restricted arch compression (via an orthotic-style insert, and barefoot. Three-dimensional motion capture and ground reaction force data were used to calculate lower limb kinematics and kinetics including MPJ angles, moments, powers and work. Estimates of plantar fascia strain due to arch compression and MPJ excursion were derived using a geometric model of the arch and a subject-specific musculoskeletal model of the plantar fascia, respectively. The plantar fascia exhibited a typical elastic stretch-shortening cycle with the majority of strain generated via arch compression. This strategy was similar in fore- and rear-foot strike runners. Restricting arch compression, and hence the elastic-spring function of the arch, was not compensated for by an increase in MPJ-derived strain. In the second half of stance the plantar fascia was found to transfer energy between the MPJ (energy absorption and the arch (energy production during recoil. This previously unreported energy transfer mechanism reduces the strain required by the plantar fascia in generating useful positive mechanical work at the arch during running.

  4. The Role of Arch Compression and Metatarsophalangeal Joint Dynamics in Modulating Plantar Fascia Strain in Running.

    Science.gov (United States)

    McDonald, Kirsty A; Stearne, Sarah M; Alderson, Jacqueline A; North, Ian; Pires, Neville J; Rubenson, Jonas

    2016-01-01

    Elastic energy returned from passive-elastic structures of the lower limb is fundamental in lowering the mechanical demand on muscles during running. The purpose of this study was to investigate the two length-modulating mechanisms of the plantar fascia, namely medial longitudinal arch compression and metatarsophalangeal joint (MPJ) excursion, and to determine how these mechanisms modulate strain, and thus elastic energy storage/return of the plantar fascia during running. Eighteen runners (9 forefoot and 9 rearfoot strike) performed three treadmill running trials; unrestricted shod, shod with restricted arch compression (via an orthotic-style insert), and barefoot. Three-dimensional motion capture and ground reaction force data were used to calculate lower limb kinematics and kinetics including MPJ angles, moments, powers and work. Estimates of plantar fascia strain due to arch compression and MPJ excursion were derived using a geometric model of the arch and a subject-specific musculoskeletal model of the plantar fascia, respectively. The plantar fascia exhibited a typical elastic stretch-shortening cycle with the majority of strain generated via arch compression. This strategy was similar in fore- and rear-foot strike runners. Restricting arch compression, and hence the elastic-spring function of the arch, was not compensated for by an increase in MPJ-derived strain. In the second half of stance the plantar fascia was found to transfer energy between the MPJ (energy absorption) and the arch (energy production during recoil). This previously unreported energy transfer mechanism reduces the strain required by the plantar fascia in generating useful positive mechanical work at the arch during running.

  5. Feeding an infant with high arched palate by high flow rate bottle nipple.

    Science.gov (United States)

    Eren, Abdulkadir; Bilgin, Huseyin; Kara, Semra

    2015-01-01

    For infants with high arched palate, feeding is one of the most immediate challenges faced by parents and caretakers. General suggestions for feeding in infants with cleft palate may be adapted to infants with high arched palate. These include oral feeding facilitation techniques and special feeding tools. Here we present a newborn with a high arched palate and serious feeding problems who was fed easily by a large size and a large hole nipple, ordinarily used for infants older than 6 months, instead of specialized feeding equipment.

  6. Axillary artery counter-current aortography in the newborn with aortic arch obstruction

    Energy Technology Data Exchange (ETDEWEB)

    Lau, K.C.; Lo, R.N.S.; Leung, M.P.

    1989-08-01

    13 newborn infants with aortic coarctation were evaluated by counter-current aortographic technique. The right radial or brachial artery approach (2 cases in each group) did not give successful aortic arch imaging while the right axiallary artery approach resulted in adequate imaging in each of 9 cases investigated. In 2, the axillary artery was transiently weakened but returned to normal within 24 hours. No other complications were encountered. Axillary artery counter-current aortography is a safe and relatively non-invasive procedure which can be used to image the aortic arch in the newborn babies when other non-invasive diagnosis of aortic arch obstruction is tentative. (orig.).

  7. Seismic response analysis of arch dam-water-rock foundation systems

    Institute of Scientific and Technical Information of China (English)

    杜修力; 王进廷

    2004-01-01

    The effect of water compressibility on the seismic responses of arch dams is not well understood. In this paper, a numerical model is developed with rigorous representation of the dynamic interaction between arch dam-waterrock foundation. The model is applied to the seismic response analysis of an arch dam with a height of 292m designed to a seismic intensity of Ⅸ. It is shown that consideration of the water compressibility clearly decreases the stress responses at key positions of the dam, while the added mass model gives a conservative estimate.

  8. Endovascular treatment of aortic arch aneurysms Tratamento endovascular dos aneurismas de arco aórtico

    Directory of Open Access Journals (Sweden)

    Roberto Chiesa

    2008-06-01

    Full Text Available BACKGROUND: Endovascular approach to the aortic arch is an appealing solution for selected patients. OBJECTIVE: To compare the technical and clinical success recorded in the different anatomical settings of endografting for aortic arch disease. METHODS: Between June 1999 and October 2006, among 178 patients treated at our institution for thoracic aorta disease with a stent-graft, the aortic arch was involved in 64 cases. According to the classification proposed by Ishimaru, aortic zone 0 was involved in 14 cases, zone 1 in 12 cases and zone 2 in 38 cases. A hybrid surgical procedure of supra-aortic debranching and revascularization was performed in 37 cases. RESULTS: Zone 0. Proximal neck length: 44±6 mm. Initial clinical success was 78.6%: two deaths (stroke, one type Ia endoleak. At a mean follow-up of 16.4±11 months the midterm clinical success was 85.7%. Zone 1. Proximal neck length: 28±5 mm. Initial clinical success was 66.7%: 0 deaths, four type Ia endoleaks. At a mean follow-up of 16.9±17.2 months the midterm clinical success was 75.0%. Zone 2. Proximal neck length: 30±5 mm. Initial clinical success was 84.2%: two deaths (one cardiac arrest, one multiorgan embolization, three type Ia endoleaks, one case of open conversion. Two cases of delayed transitory paraparesis/paraplegia were observed. At a mean follow-up of 28.0±17.2 months the midterm clinical success was 89.5%. CONCLUSIONS: This study and a literature review demonstrated that hybrid procedure for aortic arch pathology is feasible in selected patients at high risk for conventional surgery. Our experience is still limited by the relatively small sample size. We propose to reserve zone 1 for patients unfit for sternotomy or in cases with aortic neck length > 30 mm following left common carotid artery debranching. We recommend to perform complete aortic rerouting of the aortic arch in cases with lesser comorbidities and shorter aortic neck.CONTEXTO: O tratamento endovascular

  9. CT Virtual angioscopy of aortic arch%CT仿真血管内镜观察主动脉弓

    Institute of Scientific and Technical Information of China (English)

    李新平; 陈伟; 朱智明

    2011-01-01

    [ Objective ] To explore the clinical value of CT virtual angioscopy (CTVA) in the pre- and postpro-cedure evaluation of aortic arch related diseases. [Methods] 37 cases with thoracic disease underwent aortic CT angiography on a dual-source CT scanner. CTVA of aortic arch were performed with Fly-through software in all cas-? Es by using aortic CT angiographic source image data. [Results] 34 of 37 (92%) cases showed successful CTVA images, including aortic dissection (n =12), aneurysm (n =4), pseudoaneurysm (n =3), Takayasu arteritis (n =2),aortic coarctation (n =1), aneurysm combined with aortic dissection (n =1) and 11 patients following surgical or endovascu-lar procedures. CTVA of aortic arch could identify the ostia and its variations of supra-aortic vessels, estimate the localization of abnormalities with respect to supra-aortic vessels and display the stent grafts. [ Conclusions ] CTVA of aortic arch enables non-invasive visualization of the inner contours of the vasculature, and has certain instructive significance in the diagnostic classification, preprocedure planning and postprocedure evaluation for aortic arch related diseases.%目的 探讨CT仿真血管内镜(CTVA)在主动脉弓相关疾病术前和术后评价中的价值.方法 采用双源CT对37例胸主动脉疾病患者行主动脉CT成像检查,并将主动脉CT成像的源图像调至Fly-through软件中,对所有病例行主动脉弓CTVA观察.结果 92%(34/37)的病例获得了满意的CTVA图像,包括主动脉夹层12例、真性动脉瘤4例、假性动脉瘤3例、多发性大动脉炎2例、主动脉缩窄1例、真性动脉瘤合并夹层1例及11例术后随访病例.主动脉弓CTVA能明确弓上分支血管开口位置与变异、判断病变与弓上分支开口的空间关系以及显示支架型血管.结论 主动脉弓CTVA能无创观察血管腔内情况,对主动脉弓相关疾病的诊断分型、术前计划和术后评价具有一定的指导意义.

  10. Rungs 1 to 4 of DFT Jacob's ladder: Extensive test on the lattice constant, bulk modulus, and cohesive energy of solids

    Science.gov (United States)

    Tran, Fabien; Stelzl, Julia; Blaha, Peter

    2016-05-01

    A large panel of old and recently proposed exchange-correlation functionals belonging to rungs 1 to 4 of Jacob's ladder of density functional theory are tested (with and without a dispersion correction term) for the calculation of the lattice constant, bulk modulus, and cohesive energy of solids. Particular attention will be paid to the functionals MGGA_MS2 [J. Sun et al., J. Chem. Phys. 138, 044113 (2013)], mBEEF [J. Wellendorff et al., J. Chem. Phys. 140, 144107 (2014)], and SCAN [J. Sun et al., Phys. Rev. Lett. 115, 036402 (2015)] which are meta-generalized gradient approximations (meta-GGA) and are developed with the goal to be universally good. Another goal is also to determine for which semilocal functionals and groups of solids it is beneficial (or not necessary) to use the Hartree-Fock exchange or a dispersion correction term. It is concluded that for strongly bound solids, functionals of the GGA, i.e., rung 2 of Jacob's ladder, are as accurate as the more sophisticated functionals of the higher rungs, while it is necessary to use dispersion corrected functionals in order to expect at least meaningful results for weakly bound solids. If results for finite systems are also considered, then the meta-GGA functionals are overall clearly superior to the GGA functionals.

  11. RCC Arch Dam Structure on the Taxi River and Water Storage Measure During Construction

    Institute of Scientific and Technical Information of China (English)

    刘光廷; 李鹏辉; 胡昱; 张富德; 谢树南

    2002-01-01

    The new structure of roller compacted concrete (RCC) arch dams is presented for extremely cold and earthquake prone areas. The influence of construction plans and improved materials on the stresses in the Taxi River dam is also given. Earlier impoundment of water is shown to not only benefit the engineering design but also improve the stresses during construction in winter. Low cement content in the concrete and artificial short joints improved the monolithic structure and the transmitted forces. The concrete plug installed in the first cooled part of the arch dam provides excellent force transmission in the arch, which increases the monolith of the earlier arch, reduces the increasing thermal stresses that occur later, and improves the deformation flexibility of the dam.

  12. Right aortic arch with aberrant left innominate artery arising from Kommerell's diverticulum*

    Science.gov (United States)

    Faistauer, Ângela; Torres, Felipe Soares; Faccin, Carlo Sasso

    2016-01-01

    We report a case of an uncommon thoracic aorta anomaly-right aortic arch with aberrant left innominate artery arising from Kommerell's diverticulum-that went undiagnosed until adulthood. PMID:27777481

  13. Effects of Asthma and Inhalation corticosteroids on the dental arch morphology in children

    Directory of Open Access Journals (Sweden)

    S S Kumar

    2012-01-01

    Full Text Available Background: Hereditary, environmental and developmental factors play an important role in dentofacial development, as well as the initiation of malocclusion disorder. Allergic phenomenon such as asthma that induces an alternative mode of breathing in patients is a contributing factor in development of the dental arch. Aim: Our aim in this study was to evaluate the dentoalveolar morphology in asthmatic children and to analyze the effects of asthmatic medications on the dental arch. Setting and Design : This study is centered on 44 asthmatic children aged between 6-12 years from J.S.S Hospital, Mysore. Selected variables from model analysis of the casts of the asthmatic group were subjected to comparison with those of the non-asthmatic group, which comprised of 44 non-asthmatic children. Selected parameters were arch width, arch length and palatal depth. Materials and Methods : Impressions of upper and lower arches were made with rubber based impression material. A sliding digital caliper was used to measure the casts for arch width and arch length. A palatal depth gauge was used to measure the palatal depth. Statistical Analysis : Differences in arch widths, arch lengths and palatal depths between asthmatics and non-asthmatics groups were evaluated by independent sample t-tests. Chi-square test was applied to assess the frequency of occurrence of malocclusion in the asthmatic children. Result: The results obtained revealed that the arch length and palatal depth of asthmatic group had higher values compared to that of non-asthmatic groups for both age groups (6 to 8-year-old males and females, 10 to 12-year-old males and females. Inter molar width showed a significant lower value in asthmatics in the maxillary arches of 10 to 12-year-old females. Fifty percent of the asthmatic children aged 10 to 12-years had open-bite. Children under regular medication showed significant deviation in the dentoalveolar morphology as compared to those under

  14. Dentures as Learning Materials for Maxillomandibular Fixation by Erich Arch Bars.

    Science.gov (United States)

    Aksam, Ersin; Aksam, Berrak

    2016-03-01

    Maxillomandibular fixation with Erich arch bars is an economic method for handling mandibular fractures. Unfortunately, this method has some disadvantages, such as long operating time, periodontal trauma, and risk of puncture injury to the operator. To overcome these disadvantages, we propose teaching the pits and pearls of maxillomandibular fixation with Erich arch bars to trainees using dentures of a patient. Experiencing the method on dentures will shorten the learning curve.

  15. Comparison Of Medial Arch-Supporting Insoles And Heel Pads In The Treatment Of Plantar Fasciitis

    Directory of Open Access Journals (Sweden)

    Malkoc Melih

    2015-03-01

    Full Text Available Plantar fasciitis is a disorder caused by inflammation of the insertion point of the plantar fascia over the medial tubercle of the calcaneus. Foot orthotics are used to treat plantar fasciitis. Heel pads medialise the centre of force, whereas medial arch supporting insoles lateralise the force. We assessed the clinical results of the treatment of plantar fasciitis with silicone heel pads and medial arch-supported silicone insoles.

  16. Role of Soil Hysteresis in Impedance Testing as Applied to Buried Arches

    Science.gov (United States)

    1990-02-01

    information . I Add the individual listed to your distribution list. [] Delete the cited organization/individual. El Change of address. NAME: ORGANIZATION...arch structure shows that the backfill soil hysteretic behavoir is a dominant factor in explaining the absence of resonance in arch tests. ~ n0...TECHNICAL INFORMATION CENTER ATTN: ASMS 2CYS ATTN: DTIC/FDAB ATTN: MYE STRATEGIC AND THEATER NUCLEAR FORCES WEAPONS LABORATORY ATTN: DR E SEVIN ATTN

  17. Novel technique for arch and visceral artery debranching using ascending aortic inflow.

    Science.gov (United States)

    Mussa, Firas F; Walkes, Jon-Cecil; Lumsden, Alan B; Reardon, Michael J

    2008-01-01

    Aortic arch aneurysms extending proximally to the left subclavian artery have traditionally been approached through a median sternotomy and a staged elephant trunk procedure requiring a left thoracotomy or thoracoabdominal incision. We describe a novel technique for repair of such aneurysms in a single-stage, hybrid approach using bypass grafts arising from the ascending aorta to all arch and upper abdominal visceral arteries followed by endovascular exclusion of the aortic aneurysm.

  18. Goldenhar syndrome with right circumflex aortic arch, severe coarctation and vascular ring in a twin pregnancy

    Directory of Open Access Journals (Sweden)

    Elaheh Malakan Rad

    2014-01-01

    Full Text Available Goldenhar syndrome (GS or oculo-auriculo-vertebral dysplasia (OAVD, involves a wide variety of organ systems. Cardiovascular anomalies are among the frequent malformations. The purpose of this report is to introduce a male case of a dizygotic twin pregnancy with GS and right circumflex aortic arch (RCAA, severe coarctation, hypoplastic aortic arch, aberrant right subclavian artery, vascular ring, bilateral renal artery stenosis, and mild Dandy-Walker syndrome. The embryology of RCAA and coarctation is revisited.

  19. Goldenhar syndrome with right circumflex aortic arch, severe coarctation and vascular ring in a twin pregnancy

    OpenAIRE

    Elaheh Malakan Rad

    2014-01-01

    Goldenhar syndrome (GS) or oculo-auriculo-vertebral dysplasia (OAVD), involves a wide variety of organ systems. Cardiovascular anomalies are among the frequent malformations. The purpose of this report is to introduce a male case of a dizygotic twin pregnancy with GS and right circumflex aortic arch (RCAA), severe coarctation, hypoplastic aortic arch, aberrant right subclavian artery, vascular ring, bilateral renal artery stenosis, and mild Dandy-Walker syndrome. The embryology of RCAA and co...

  20. Goldenhar syndrome with right circumflex aortic arch, severe coarctation and vascular ring in a twin pregnancy.

    Science.gov (United States)

    Rad, Elaheh Malakan

    2014-09-01

    Goldenhar syndrome (GS) or oculo-auriculo-vertebral dysplasia (OAVD), involves a wide variety of organ systems. Cardiovascular anomalies are among the frequent malformations. The purpose of this report is to introduce a male case of a dizygotic twin pregnancy with GS and right circumflex aortic arch (RCAA), severe coarctation, hypoplastic aortic arch, aberrant right subclavian artery, vascular ring, bilateral renal artery stenosis, and mild Dandy-Walker syndrome. The embryology of RCAA and coarctation is revisited.

  1. Goldenhar syndrome with right circumflex aortic arch, severe coarctation and vascular ring in a twin pregnancy

    Science.gov (United States)

    Rad, Elaheh Malakan

    2014-01-01

    Goldenhar syndrome (GS) or oculo-auriculo-vertebral dysplasia (OAVD), involves a wide variety of organ systems. Cardiovascular anomalies are among the frequent malformations. The purpose of this report is to introduce a male case of a dizygotic twin pregnancy with GS and right circumflex aortic arch (RCAA), severe coarctation, hypoplastic aortic arch, aberrant right subclavian artery, vascular ring, bilateral renal artery stenosis, and mild Dandy-Walker syndrome. The embryology of RCAA and coarctation is revisited. PMID:25298700

  2. Edentulism and shortened dental arch in Brazilian elderly from the National Survey of Oral Health 2003

    Directory of Open Access Journals (Sweden)

    Marco Túlio Freitas Ribeiro

    2011-10-01

    Full Text Available OBJECTIVE: To describe the distribution of edentulism and estimate the prevalence of functional dentition and shortened dental arch among elderly population. METHODS: A population-based epidemiological study was carried out with a sample of 5,349 respondents aged 65 to 74 years obtained from the 2002 and 2003 Brazilian Ministry of Health/Division of Oral Health survey database. The following variables were studied: gender; macroregion of residence; missing teeth; percentage that met the World Health Organization goal for oral health in the age group 65 to 74 years (50% having at least 20 natural teeth; presence of shortened dental arch; number of posterior occluding pairs of teeth. The Chi-square test assessed the association between categorical variables. The Kruskal-Wallis and Mann-Whitney tests were used to assess differences of mean between number of posterior occluding pairs teeth, macro-region and gender. RESULTS: The elderly population had an average of 5.49 teeth (SD: 7.93 with a median of 0. The proportion of completely edentulous respondents was 54.7%. Complete edentulism was 18.2% in the upper arch and 1.9% in the lower arch. The World Health Organization goal was achieved in 10% of all respondents studied. However, only 2.7% had acceptable masticatory function and aesthetics (having at least shortened dental arch and a mean number of posterior occluding pairs of 6.94 (SD=2.97. There were significant differences of the percentage of respondents that met the World Health Organization goal and presence of shortened dental arch between men and women. There were differences in shortened dental arch between macroregions. CONCLUSIONS: The Brazilian epidemiological oral health survey showed high rate of edentulism and low rate of shortened dental arch in the elderly population studied, thus suggesting significant functional and aesthetic impairment in all Brazilian macroregions especially among women.

  3. Correlation Between Maxillary Central Incisor Crown Morphology And Mandibular Dental Arch Form In Normal Occlusion Subjects

    OpenAIRE

    Paranhos, Luiz Renato; Lima,Carolina Souto; Silva,Ricardo Henrique Alves da; Daruge Júnior,Eduardo; Torres,Fernando Cesar

    2012-01-01

    The aim of this study was to evaluate the correlation between the morphology of the mandibular dental arch and the maxillary central incisor crown. Cast models from 51 Caucasian individuals, older than 15 years, with optimal occlusion, no previous orthodontic treatment, featuring 4 of the 6 keys to normal occlusion by Andrews (the first being mandatory) were observed. The models were digitalized using a 3D scanner, and images of the maxillary central incisor and mandibular dental arch were ob...

  4. Continuum analysis of common branching patterns in the human arch of the aorta.

    Science.gov (United States)

    Zamir, M; Sinclair, P

    1990-01-01

    A model is proposed for describing common variations in the arrangement of branches on the arch of the human aorta, and the model is used to analyze data from 123 human arches. The analysis allows the observed variations to fall freely along a continuous spectrum, rather than be confined to discrete categories as is commonly done at present. The results thus describe these variations in a more natural way and throw some new light on their likely source.

  5. [Interrupted aortic arch in a 68-year-old female with hypertension].

    Science.gov (United States)

    Benincasa, Susanna; Fineschi, Massimo; Ceccherini, Claudio; Pierli, Carlo

    2015-04-01

    Interrupted aortic arch (IAA) is a rare congenital malformation of the aorta and aortic arch. We report the case of a 68-year-old female with hypertension and poor control of blood pressure levels. She was diagnosed with aortic coarctation by aortography during young age. A double access angiography was performed that showed a type A IAA, a rare condition in adults that may cause hypertension.

  6. Calculation and Analysis of Internal Force in Arch Structure of Frozen Soil

    Institute of Scientific and Technical Information of China (English)

    YUE Feng-tian; ZHANG Yong; SHI Rong-jian

    2005-01-01

    Aimed at the frozen soil arch reinforcement form of upside shed used for the shield machine launching in tunneling the internal force of the structure was calculated with the aid of the structural mechanics theory. Considering the space characteristics of the structure,this calculating method is suitable for practical engineering.Moreover,the behavior of the freezing arch reinforcement structure was analyzed combined with an engineering case.

  7. The massive star Initial Mass Function of the Arches cluster

    CERN Document Server

    Espinoza, Pablo; Melnick, Jorge

    2009-01-01

    The massive Arches cluster near the Galactic Center is in principle an ideal laboratory to investigate massive star formation under extreme conditions. But it comes at a high price: the cluster is hidden behind several tens of magnitudes of visual extinction. Severe crowding requires space or AO-assisted instruments to resolve the stellar populations, and even with the best instruments the interpretation of the data is far from direct. Several investigations using NICMOS and the most advanced AO imagers on the gro und revealed an overall top-heavy IMF for the cluster, with a very flat IMF near the center. There are a number of effects, however, that could potentially bias these results, in particular the strong differential extinction and the problem of transforming the observations to a standard photometric system in the presence of strong reddening. We present new observations obtained with the NAOS-Conica (NACO) AO-imager on the VLT. The problem of photometric transformation is avoided by working in the na...

  8. Behaviour of Frictional Joints in Steel Arch Yielding Supports

    Science.gov (United States)

    Horyl, Petr; Šňupárek, Richard; Maršálek, Pavel

    2014-10-01

    The loading capacity and ability of steel arch supports to accept deformations from the surrounding rock mass is influenced significantly by the function of the connections and in particular, the tightening of the bolts. This contribution deals with computer modelling of the yielding bolt connections for different torques to determine the load-bearing capacity of the connections. Another parameter that affects the loading capacity significantly is the value of the friction coefficient of the contacts between the elements of the joints. The authors investigated both the behaviour and conditions of the individual parts for three values of tightening moment and the relation between the value of screw tightening and load-bearing capacity of the connections for different friction coefficients. ANSYS software and the finite element method were used for the computer modelling. The solution is nonlinear because of the bi-linear material properties of steel and the large deformations. The geometry of the computer model was created from designs of all four parts of the structure. The calculation also defines the weakest part of the joint's structure based on stress analysis. The load was divided into two loading steps: the pre-tensioning of connecting bolts and the deformation loading corresponding to 50-mm slip of one support. The full Newton-Raphson method was chosen for the solution. The calculations were carried out on a computer at the Supercomputing Centre VSB-Technical University of Ostrava.

  9. Geology of the Juanita Arch quadrangle, Mesa county, Colorado

    Science.gov (United States)

    Shoemaker, Eugene M.

    1954-01-01

    The Juanita Arch quadrangle is one of eighteen 7 1/2-minute quadrangles covering the principal carnotite-producing area of southwestern Colorado. The geology of these quadrangles was mapped by the U.S. Geological Survey for the Atomic Energy Commission as part of a comprehensive study of carnotite deposits. The rocks exposed in the eighteen quadrangles consist of crystalline rocks of pre-Cambrian age and sedimentary rocks that range in age from late Paleozoic to Quaternary. Over much of the area the sedimentary rocks are flat lying, but in places the rocks are disrupted by high-angle faults and northwest-trending folds. Conspicuous among the folds are large anticlines having cores of intrusive salt and gypsum. Most of the carnotite deposits are confined to the Salt Wash sandstone member of the Jurassic Morrison formation. Within this sandstone, most of the deposits are spottily distributed through an arcuate zone known as the "Uravan Mineral Belt". Individual deposits range in size from irregular masses containing only a few tons of ore ro large, tabular masses containing many thousands of tons. The ore consists largely of sandstone selectively impregnated and in part replaced by uranium and vanadium minerals. Most of the deposits appear to be related to certain sedimentary structures in sandstone of favorable construction.

  10. PDR Emission from the Arched-Filaments and Nearby Positions

    CERN Document Server

    García, P; Abel, N; Steinke, M; Burton, M; Blackwell, R

    2016-01-01

    We investigate the physical conditions of the gas, atomic and molecular, in the filaments in the context of Photo-Dissociation Regions (PDRs) using the KOSMA-PDR mode of clumpy clouds. We also compare the [CII] vs. [NII] integrated intensity predictions in Abel et al. 2005 for HII regions and adjacent PDRs in the Galactic disk, and check for their applicability under the extreme physical conditions present in the GC. Our preliminary results show that observed integrated intensities are well reproduced by the PDR model. The gas is exposed to a relatively low Far-UV field between 10^2 - 10^3 Draine fields. The total volume hydrogen density is well constrained between 10^4 - 10^5 cm^-3. The hydrogen ionization rate due to cosmic-rays varies between 10^-15 and 4x10^-15 s^-1, with the highest value ~ 10^-14 s^-1 found towards G0.07+0.04. Our results show that the line-of-sight contribution to the total distance of the filaments to the Arches Cluster is not negligible. The spatial distribution of the [CII]/[NII] ra...

  11. Ductal Stent Implantation in Tetralogy of Fallot with Aortic Arch Abnormality

    Science.gov (United States)

    Ergul, Yakup; Saygi, Murat; Ozyilmaz, Isa; Guzeltas, Alper; Odemis, Ender

    2015-01-01

    Stenting of patent ductus arteriosus is an alternative to palliative cardiac surgery in newborns with duct-dependent or decreased pulmonary circulation; however, the use of this technique in patients with an aortic arch abnormality presents a challenge. Tetralogy of Fallot is a congenital heart defect that is frequently associated with anomalies of the aortic arch and its branches. The association is even more common in patients with chromosome 22q11 deletion. We present the case of an 18-day-old male infant who had cyanosis and a heart murmur. After an initial echocardiographic evaluation, the patient was diagnosed with tetralogy of Fallot and right-sided aortic arch. The pulmonary annulus and the main pulmonary artery and its branches were slightly hypoplastic; the ductus arteriosus was small. Conventional and computed tomographic angiograms revealed a double aortic arch and an aberrant left subclavian artery. The right aortic arch branched into the subclavian arteries and continued into the descending aorta, whereas the left aortic arch branched into the common carotid arteries and ended with the patent ductus arteriosus. After evaluation of the ductal anatomy, we implanted a 3.5 × 15-mm coronary stent in the duct. Follow-up injections showed augmented pulmonary flow and an increase in oxygen saturation from 65% to 94%. The patient was also found to have chromosome 22q11 deletion. PMID:26175649

  12. Nonlinear simulation of arch dam cracking with mixed finite element method

    Directory of Open Access Journals (Sweden)

    Ren Hao

    2008-06-01

    Full Text Available This paper proposes a new, simple and efficient method for nonlinear simulation of arch dam cracking from the construction period to the operation period, which takes into account the arch dam construction process and temperature loads. In the calculation mesh, the contact surface of pair nodes is located at places on the arch dam where cracking is possible. A new effective iterative method, the mixed finite element method for friction-contact problems, is improved and used for nonlinear simulation of the cracking process. The forces acting on the structure are divided into two parts: external forces and contact forces. The displacement of the structure is chosen as the basic variable and the nodal contact force in the possible contact region of the local coordinate system is chosen as the iterative variable, so that the nonlinear iterative process is only limited within the possible contact surface and is much more economical. This method was used to simulate the cracking process of the Shuanghe Arch Dam in Southwest China. In order to prove the validity and accuracy of this method and to study the effect of thermal stress on arch dam cracking, three schemes were designed for calculation. Numerical results agree with actual measured data, proving that it is feasible to use this method to simulate the entire process of nonlinear arch dam cracking.

  13. Prediction of Collapse Scope of Deep-Buried Tunnels Using Pressure Arch Theory

    Directory of Open Access Journals (Sweden)

    Yingchao Wang

    2016-01-01

    Full Text Available Tunnel collapse remains a serious problem in practice. Effective prediction methods on tunnel collapse are necessary for tunnel engineering. In this study, systematic study on the pressure arch was presented to predict tunnel collapse. Multiple factors under different conditions were considered. First, the pressure arch was described as a certain scope in comparison with the lowest pressure arch line. Then, a deep-buried circular tunnel was selected as the investigated object. Its collapse scope was analyzed using the lowest pressure arch line. Meanwhile, the main influence from the ground stress field was considered. Different modes of ground stress fields were investigated in detail. The results indicate that the collapse scope varies with different ground stress fields. Determination on the collapse scope is strongly affected by the judgment standard of the pressure arch. Furthermore, a selected case was analyzed with the pressure arch. The area and the height of tunnel collapse were calculated with multiple factors, including ground stress field, judgment standard, and lateral pressure coefficient. Finally, selected results were compared with relevant previous researches, and reasonable results were obtained. The present results are helpful for further understanding of the tunnel collapse and could provide suitable guidance for tunnel projects.

  14. Analysis of seismic disaster failure mechanism and dam-break simulation of high arch dam

    Science.gov (United States)

    Zhang, Jingkui; Zhang, Liaojun

    2014-06-01

    Based on a Chinese national high arch dam located in a meizoseismal region, a nonlinear numerical analysis model of the damage and failure process of a dam-foundation system is established by employing a 3-D deformable distinct element code (3DEC) and its re-development functions. The proposed analysis model considers the dam-foundation-reservoir coupling effect, influence of nonlinear contact in the opening and closing of the dam seam surface and abutment rock joints during strong earthquakes, and radiation damping of far field energy dissipation according to the actual workability state of an arch dam. A safety assessment method and safety evaluation criteria is developed to better understand the arch dam system disaster process from local damage to ultimate failure. The dynamic characteristics, disaster mechanism, limit bearing capacity and the entire failure process of a high arch dam under a strong earthquake are then analyzed. Further, the seismic safety of the arch dam is evaluated according to the proposed evaluation criteria and safety assessment method. As a result, some useful conclusions are obtained for some aspects of the disaster mechanism and failure process of an arch dam. The analysis method and conclusions may be useful in engineering practice.

  15. Study on real working performance and overload safety factor of high arch dam

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Considering the fact that high arch dams have problems such as complicated stress,high cost,and hazards after being damaged,this paper intends to study the effects of load,material strength,and safety analysis method on dam safety and working performance of arch dams.In this article,the effects of temperature,self weight exaction way and water loading on structure response are first discussed,and a more reasonable way of considering is then put forward.By taking into consideration the mechanical property of materials and comparing the effects of different yield criteria on overloading safety of high arch dams,this paper concludes that brittle characteristics of concrete should be fully considered when conducting safety assessment for high arch dams to avoid overestimating the bearing capacity of the dams.By comparing several typical projects,this paper works out a safety assessment system of multiple safety and relevant engineering analogical analysis methods,which is closer to the actual situation,and thus is able to assess the response of high arch dam structure in a more comprehensive way,elicit the safety coefficients in different situations,and provide a new way of considering the safety assessment of high arch dams.

  16. Correlation between maxillary central incisor crown morphology and mandibular dental arch form in normal occlusion subjects.

    Science.gov (United States)

    Paranhos, Luiz Renato; Lima, Carolina Souto; da Silva, Ricardo Henrique Alves; Daruge Júnior, Eduardo; Torres, Fernando Cesar

    2012-01-01

    The aim of this study was to evaluate the correlation between the morphology of the mandibular dental arch and the maxillary central incisor crown. Cast models from 51 Caucasian individuals, older than 15 years, with optimal occlusion, no previous orthodontic treatment, featuring 4 of the 6 keys to normal occlusion by Andrews (the first being mandatory) were observed. The models were digitalized using a 3D scanner, and images of the maxillary central incisor and mandibular dental arch were obtained. These were printed and placed in an album below pre-set models of arches and dental crowns, and distributed to 12 dental surgeons, who were asked to choose which shape was most in accordance with the models and crown presented. The Kappa test was performed to evaluate the concordance among evaluators while the chi-square test was used to verify the association between the dental arch and central incisor morphology, at a 5% significance level. The Kappa test showed moderate agreement among evaluators for both variables of this study, and the chi-square test showed no significant association between tooth shape and mandibular dental arch morphology. It may be concluded that the use of arch morphology as a diagnostic method to determine the shape of the maxillary central incisor is not appropriate. Further research is necessary to assess tooth shape using a stricter scientific basis.

  17. Dental crowding in primary dentition and its relationship to arch and crown dimensions among preschool children of Davangere.

    Science.gov (United States)

    Prabhakar, A R; Ravi, G R; Kurthukoti, Ameet J; Shubha, A B

    2008-01-01

    The purpose of the present study was to evaluate dental crowding in the deciduous dentition and its relationship to the crown and the arch dimensions among preschool children of Davangere. Stratified randomized selection of one hundred, 3-4 year old healthy children with all primary teeth erupted was done and divided into two groups. One group had children with anterior crowding in both the arches while the other had spacing. Alginate impressions of the upper and lower arches were made and the study casts were obtained. The tooth and arch dimensions were determined. Mesiodistal dimensions of all the teeth were significantly larger in the crowded arch group. However, the buccolingual dimensions of the maxillary right central incisor, mandibular lateral incisors and the maxillary molars and the crown shape ratio of maxillary lateral incisors, mandibular canines and mandibular right second molar was statistically different. No significant correlation was found between the arch width and the presence of crowding of deciduous dentition. The arch depth of the spaced dentition was greater when compared to the crowded ones. The arch perimeter of the crowded arches was significantly less than the spaced arches.

  18. Monitoring Soil Erosion on a Burned Site in the Mojave-Great Basin Transition Zone: Final Report for the Jacob Fire Site

    Energy Technology Data Exchange (ETDEWEB)

    Miller, Julianne [DRI; Etyemezian, Vic [DRI; Cablk, Mary E. [DRI; Shillito, Rose [DRI; Shafer, David [DOE Grand Junction, Colorado

    2013-06-01

    A historic return interval of 100 years for large fires in the U.S. southwestern deserts is being replaced by one where fires may reoccur as frequently as every 20 to 30 years. The shortened return interval, which translates to an increase in fires, has implications for management of Soil Corrective Action Units (CAUs) and Corrective Action Sites (CASs) for which the Department of Energy, National Nuclear Security Administration Nevada Field Office has responsibility. A series of studies was initiated at uncontaminated analog sites to better understand the possible impacts of erosion and transport by wind and water should contaminated soil sites burn. The first of these studies was undertaken at the Jacob Fire site approximately 12 kilometers (7.5 miles) north of Hiko, Nevada. A lightning-caused fire burned approximately 200 hectares during August 6-8, 2008. The site is representative of a transition between Mojave and Great Basin desert ecoregions on the Nevada National Security Site (NNSS), where the largest number of Soil CAUs/CASs are located. The area that burned at the Jacob Fire site was primarily a Coleogyne ramosissima (blackbrush) and Ephedra nevadensis (Mormon tea) community, also an abundant shrub assemblage in the similar transition zone on the NNSS. This report summarizes three years of measurements after the fire. Seven measurement campaigns at the Jacob Fire site were completed. Measurements were made on burned ridge (upland) and drainage sites, and on burned and unburned sites beneath and between vegetation. A Portable In-Situ Wind Erosion Lab (PI-SWERL) was used to estimate emissions of suspended particles at different wind speeds. Context for these measurements was provided through a meteorological tower that was installed at the Jacob Fire site to obtain local, relevant environmental parameters. Filter samples, collected from the exhaust of the PI-SWERL during measurements, were analyzed for chemical composition. Runoff and water erosion were

  19. Proper motions of the Arches cluster with Keck-LGS Adaptive Optics: the first kinematic mass measurement of the Arches

    CERN Document Server

    Clarkson, Will; Morris, Mark; Lu, Jessica; Stolte, Andrea; McCrady, Nate; Do, Tuan; Yelda, Sylvana

    2011-01-01

    We report the first detection of the intrinsic velocity dispersion of the Arches cluster - a young (~2 Myr), massive (~10,000 Solar Mass) starburst cluster located near the Galactic center. This was accomplished using proper motion measurements within the central region of the cluster, obtained with the laser guide star adaptive optics system at Keck Observatory over a 3 year time baseline (2006-2009). This uniform dataset results in proper motion measurements that are improved by a factor ~5 over previous measurements from heterogeneous instruments, yielding internal velocity dispersion estimates 0.15 +/- 0.01 mas/yr, which corresponds to 5.4 +/- 0.4 km/s at a distance of 8.4 kpc. Projecting a simple model for the cluster onto the sky to compare with our proper motion dataset, in conjunction with surface density data, we estimate the total present-day mass of the cluster to be 15,000 (+7400 -6000) Solar masses. The mass in stars observed within a cylinder of radius R=0.4 pc is found to be 9000 (+4000 -3500) ...

  20. Biomechanics of longitudinal arch support mechanisms in foot orthoses and their effect on plantar aponeurosis strain.

    Science.gov (United States)

    Kogler, G F; Solomonidis, S E; Paul, J P

    1996-07-01

    OBJECTIVE: The purpose of this investigation was to quantify the longitudinal arch support properties of several types of foot orthosis. DESIGN: An in vitro method that simulated 'static stance' was used to determine arch support capabilities, with plantar aponeurosis strain implemented as the performance measure. BACKGROUND: A longitudinal arch support mechanism of an orthosis resists depression of the foot's arches by transferring a portion of the load to the medial structures of the foot. Since the plantar aponeurosis is in tension when the foot is loaded, a quantifiable decrease in strain should occur with an adequate orthotic arch control mechanism. METHODS: A differential variable reluctance transducer was surgically implanted in the plantar aponeurosis of cadaveric donor limb feet (n = 7). Each specimen was mounted in an electromechanical test machine which applied a load of up to 900 N axially to the tibia. The test schedule was divided into seven test conditions: specimen barefoot; specimen with shoe and specimen with shoe and five different orthoses. RESULTS: The University of California Biomechanics Laboratory Shoe Insert and two other foot orthoses significantly decreased the strain in the plantar aponeurosis compared to the barefoot control and were considered effective arch supports (P plantar aponeurosis strain. Significant variations of time required to achieve the specified load levels were recorded among the test conditions, indicating the relative cushioning properties of the shoe/orthosis systems. CONCLUSIONS: The patterns of plantar aponeurosis strain observed in cadaveric tests suggest that certain types of orthoses are more effective than others in the support of the foot's longitudinal arches. It is suggested that to support the longitudinal arches of the foot effectively the medial surface contours of the orthosis must stabilize the apical bony structure of the foot's arch. RELEVANCE: Reducing tension in the plantar aponeurosis is an

  1. Role of aortic arch vascular mechanics in cardiovagal baroreflex sensitivity.

    Science.gov (United States)

    Klassen, Stephen A; Chirico, Daniele; Dempster, Kylie S; Shoemaker, J Kevin; O'Leary, Deborah D

    2016-07-01

    Cardiovagal baroreflex sensitivity (cvBRS) measures the efficiency of the cardiovagal baroreflex to modulate heart rate in response to increases or decreases in systolic blood pressure (SBP). Given that baroreceptors are located in the walls of the carotid sinuses (CS) and aortic arch (AA), the arterial mechanics of these sites are important contributors to cvBRS. However, the relative contribution of CS and AA mechanics to cvBRS remains unclear. This study employed sex differences as a model to test the hypothesis that differences in cvBRS between groups would be explained by the vascular mechanics of the AA but not the CS. Thirty-six young, healthy, normotensive individuals (18 females; 24 ± 2 yr) were recruited. cvBRS was measured using transfer function analysis of the low-frequency region (0.04-0.15 Hz). Ultrasonography was performed at the CS and AA to obtain arterial diameters for the measurement of distensibility. Local pulse pressure (PP) was taken at the CS using a hand-held tonometer, whereas AA PP was estimated using a transfer function of brachial PP. Both cvBRS (25 ± 11 vs. 19 ± 7 ms/mmHg, P = 0.04) and AA distensibility (16.5 ± 6.0 vs. 10.5 ± 3.8 mmHg(-1) × 10(-3), P = 0.02) were greater in females than males. Sex differences in cvBRS were eliminated after controlling for AA distensibility (P = 0.19). There were no sex differences in CS distensibility (5.32 ± 2.3 vs. 4.63 ± 1.3 mmHg(-1) × 10(-3), P = 0.32). The present data demonstrate that AA mechanics are an important contributor to differences in cvBRS.

  2. Numerical analyses in the design of umbrella arch systems

    Institute of Scientific and Technical Information of China (English)

    J. Oke; N. Vlachopoulos; M.S. Diederichs

    2014-01-01

    Due to advances in numerical modelling, it is possible to capture complex support-ground interaction in two dimensions and three dimensions for mechanical analysis of complex tunnel support systems, although such analysis may still be too complex for routine design calculations. One such system is the forepole element, installed within the umbrella arch temporary support system for tunnels, which warrants such support measures. A review of engineering literature illustrates that a lack of design standards exists regarding the use of forepole elements. Therefore, when designing such support, de-signers must employ complex numerical models combined with engineering judgement. With reference to past developments by others and new investigations conducted by the authors on the Driskos tunnel in Greece and the Istanbul metro, this paper illustrates how advanced numerical modelling tools can facilitate understanding of the influences of design parameters associated with the use of forepole ele-ments. In addition, this paper highlights the complexity of the ground-support interaction when simulated with two-dimensional (2D) finite element software using a homogenous reinforced region, and three-dimensional (3D) finite difference software using structural elements. This paper further il-lustrates sequential optimisation of two design parameters (spacing and overlap) using numerical modelling. With regard to capturing system behaviour in the region between forepoles for the purpose of dimensioning spacing, this paper employs three distinctive advanced numerical models:particle codes, continuous finite element models with joint set and Voronoi blocks. Finally, to capture the behaviour/failure ahead of the tunnel face (overlap parameter), 2D axisymmetric models are employed. Finally, conclusions of 2D and 3D numerical assessment on the Driskos tunnel are drawn. The data enriched case study is examined to determine an optimum design, based on the proposed optimisation of

  3. Aortic arch thrombectomy in a 2.8 kilogram neonate--a case report and review of the literature.

    Science.gov (United States)

    Omeje, Ikenna; Ram, Awat; Kostolny, Martin

    2013-02-01

    Aortic arch thrombus is a rare occurrence in neonates. In the few described cases, this has mainly been associated with sepsis or early postnatal interventions, such as insertion of umbilical arterial line. We describe a case of occlusive aortic arch thrombus in a neonate who presented with signs of critical coarctation and successfully underwent surgical thrombectomy on deep hypothermic circulatory arrest. We also present a review of the most recently published cases of aortic arch thrombus in neonates and the treatment options employed.

  4. The Origin of the Dust Arch in the Halo of NGC 4631 An Expanding Superbubble?

    CERN Document Server

    Taylor, C L; Taylor, Christopher L.

    2003-01-01

    We study the nature and the origin of the dust arch in the halo of the edge-on galaxy NGC 4631 detected by Neininger & Dumke (1999). We present CO observations made using the new On-The-Fly mapping mode with the FCRAO 14m telescope, and find no evidence for CO emission associated with the dust arch. Our examination of previously published HI data shows that if previous assumptions about the dust temperature and gas/dust ratio are correct, then there must be molecular gas associated with the arch, below our detection threshold. If this is true, then the molecular mass associated with the dust arch is between 1.5 x 10^8 M(sun)and 9.7 x 10^8 M(sun), and likely towards the low end of the range. A consequence of this is that the maximum allowed value for the CO-to-H_2 conversion factor is 6.5 times the Galactic value, but most likely closer to the Galactic value. The kinematics of the HI apparently associated with the dust arch reveal that the gas here is not part of an expanding shell or outflow, but is inste...

  5. Role of the tranverse arch in stiffness of the human foot

    Science.gov (United States)

    Dias, Marcelo A.; Singh, Dhiraj K.; Bandi, Mahesh M.; Venkadesan, Madhusudhan; Mandre, Shreyas

    2015-03-01

    Human ancestors evolved from walking, around 6 million years (Ma) ago, to regular endurance running, around 2 Ma ago. Simultaneously, the feet evolved from a relatively flat structure like that of current day Chimpanzees (or our hands), to the modern human foot with two arches, a longitudinal and a transversal arch. The feet play a crucial role in locomotion by providing sufficient stiffness for propulsion, and being soft and pliable to absorb impacts and store energy elastically. Here we show that the transverse arch could play a central role in stiffness modulation. We first treat the foot as an elastic shell that is with intrinsic curvature. Calculations, numerics and physical experiments all show that for a foot-like shell, the stiffness has a power-law dependence on transverse curvature beyond a critical value. On the other hand, for purely longitudinally curved feet, or transverse curvature below the critical value, lead to low stiffness like a flat plate. Discrete realizations of a continuum shell, more closely resembling the human foot, also exhibit curvature induced stiffening. These results shed light on the role of the quintessentially human feature of a doubly arched foot, and suggest mechanical consequences of disorders such as a collapsed arch. HFSP RGY0091/2013.

  6. Study on Optimal Grouting Timing for Controlling Uplift Deformation of a Super High Arch Dam

    Science.gov (United States)

    Lin, Peng; Zhu, Xiaoxu; Li, Qingbin; Liu, Hongyuan; Yu, Yongjun

    2016-01-01

    A grouting model is developed for use during the grouting of the complex foundation of a super high arch dam. The purpose as to determine the optimal grouting timing and appropriate grouting pressure involved in controlling the uplift deformation of the dam. The model determines the optimal grouting time as the height of the arch dam increases with the concrete pouring, by checking the tensile stresses in the dam against standard specifications. The appropriate grouting pressures are given on the basis of the actual grouting pressures monitored during the upstream riverbed foundation grouting. An engineering procedure, applying the model, was then proposed and used during foundation grouting under the toe block of the Xiluodu super high-arch dam in south-western China. The quality of the foundation grouting was evaluated against the results from pressurized water permeability tests, acoustic wave velocity tests, elastic modulus tests and panoramic photographing of the rockmass on completion of the foundation grouting. The results indicated that the proposed grouting model can be applied to effectively reduce the uplift deformation and associated cracking risk for super high arch dams, and it can be concluded that the proposed engineering grouting procedure is a valuable tool for improving foundation grouting under the toe blocks of a super high arch dam.

  7. Study on Structure of Arched Longitudinal Beams of Deep Water Wharf

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    High-pile and beam-slab quays have been widely used after several years development. They are mature enough to be one of the most important structural types of wharves in China coastal areas. In order to accommodate large tonnage vessels, wharves should be constructed in deep water gradually. However, conventional high-pile and beam-slab structures are hard to meet the requirements of large deep-water wharf. According to arch's stress characteristics, a new type of wharf with catenary arched longitudinal beams is presented in this paper. The new wharf structure can make full use of arch's overhead crossing and reinforced concrete compression resistance, improve the interval between transverse bents greatly, and decrease underwater construction quantity. Thus, the construction cost cab be reduced. Take the third phase project of the Yangshan Deep-water Port for example, comparative analysis on catenary arched longitudinal beams and conventional longitudinal beams has been made. The result shows that with the same wharf length and width, the same loads and same longitudinal beam moment, catenary arch structure can improve the interval between bents up to 28 m, decrease the number of piles and underwater construction quantity.

  8. Children with flat feet have weaker toe grip strength than those having a normal arch

    Science.gov (United States)

    Tashiro, Yuto; Fukumoto, Takahiko; Uritani, Daisuke; Matsumoto, Daisuke; Nishiguchi, Shu; Fukutani, Naoto; Adachi, Daiki; Hotta, Takayuki; Morino, Saori; Shirooka, Hidehiko; Nozaki, Yuma; Hirata, Hinako; Yamaguchi, Moe; Aoyama, Tomoki

    2015-01-01

    [Purpose] This study investigated the relationship between toe grip strength and foot posture in children. [Subjects and Methods] A total of 619 children participated in this study. The foot posture of the participants was measured using a foot printer and toe grip strength was measured using a toe grip dynamometer. Children were classified into 3 groups; flatfoot, normal, and high arch, according to Staheli’s arch index. The differences in demographic data and toe grip strength among each foot posture group were analyzed by analysis of variance. Additionally, toe grip strength differences were analyzed by analysis of covariance, adjusted to body mass index, age, and gender. [Results] The number of participants classified as flatfoot, normal, and high arch were 110 (17.8%), 468 (75.6%), and 41 (6.6%), respectively. The toe grip strength of flatfoot children was significantly lower than in normal children, as shown by both analysis of variance and analysis of covariance. [Conclusion] A significant difference was detected in toe grip strength between the low arch and normal foot groups. Therefore, it is suggested that training to increase toe grip strength during childhood may prevent the formation of flat feet or help in the development of arch. PMID:26696732

  9. The proper motion of the Arches cluster with Keck Laser-Guide Star Adaptive Optics

    CERN Document Server

    Stolte, Andrea; Morris, Mark; Lu, Jessica R; Brandner, Wolfgang; Matthews, Keith

    2007-01-01

    We present the first measurement of the proper motion of the young, compact Arches cluster near the Galactic center from near-infrared adaptive optics (AO) data taken with the recently commissioned laser-guide star (LGS) at the Keck 10-m telescope. The excellent astrometric accuracy achieved with LGS-AO provides the basis for a detailed comparison with VLT/NAOS-CONICA data taken 4.3 years earlier. Over the 4.3 year baseline, a spatial displacement of the Arches cluster with respect to the field population is measured to be 24.0 +/- 2.2 mas, corresponding to a proper motion of 5.6 +/- 0.5 mas/yr or 212 +/- 20 km/s at a distance of 8 kpc. In combination with the known radial velocity of the cluster, we derive a 3D space motion of 232 +/- 22 km/s of the Arches relative to the field. The large proper motion of the Arches cannot be explained with any of the closed orbital families observed in gas clouds in the bar potential of the inner Galaxy, but would be consistent with the Arches being on a transitional trajec...

  10. Actualité du roman archéologique

    Directory of Open Access Journals (Sweden)

    Philippe Dufour

    2009-01-01

    Full Text Available Salammbô a beau se passer au IIIe siècle avant Jésus-Christ, Flaubert a beau y voir une ressource pour fuir le monde moderne, le roman antique n’en pense pas moins l’Histoire contemporaine, au moins par intermittence. On essaie de le montrer à propos d’un court fragment rescapé du chapitre explicatif, la description des assemblées des Syssites. Loin de démarquer simplement telle ou telle source (comme l’analyse aristotélicienne de la constitution carthaginoise dans La Politique, le paragraphe décrivant le banquet des Riches pendant que les Barbares entourent la ville évoque en surimpression la fête impériale sur fond de peur sociale. Des images relais (Les Romains de la décadence de Thomas Couture, Les Châtiments de Victor Hugo incitent le premier public à une lecture allégorique. Le chronotope de l’assemblée dénonce l’illusion d’un pouvoir et figure le devenir historique. Flaubert s’approprie ainsi de façon originale le genre du roman archéologique tel que l’abbé Barthélemy l’inventa ou tel que Henryk Sienkiewick le prolongera. S’y vérifie sa définition de l’histoire comme réflexion du présent sur le passé.Some scholars like Anne Green have shown that Flaubert in his historical novel, Salammbô, frequently alludes to contemporary history in spite of the obvious difference between the Carthaginian civilization and the modern world. In this essay I will try to grasp the shift in referenciality through a small description (a meeting between the wealthy, inspired by Aristotle’s Politics: Hugolian images of decadence from Les Châtiments appear superimposed on it, so that the archeological novel turns into an allegorical satire on the Second Empire.

  11. The origin and significance of secondary flows in the aortic arch.

    Science.gov (United States)

    Black, M M; Hose, D R; Lawford, P V

    1995-01-01

    This paper comprises a study of the secondary flow patterns that can develop in the human aortic arch. Clinical evidence of these secondary flows has been obtained by Kilner et al. using magnetic resonance velocity mapping techniques. Some of their results are presented for comparison in this paper. Four difference parametric models of the aortic arch have been analysed using computational fluid dynamic techniques. Both steady and transient flow conditions have been considered and two different commercially available software packages were used, namely FIDAP and FLOTRAN. A satisfactory comparison of the theoretical analysis with the results, both in vivo and in vitro, obtained by Kilner et al. for their out-of-plane inlet model was found. The theoretical analysis can now be extended to analyse the effect of different configurations and orientations of artificial aortic valves on the resulting aortic arch flow patterns.

  12. Collapse Modeling of a Masonry Arch Dam Using the Cohesive Interface Elements

    Directory of Open Access Journals (Sweden)

    Jianwen Pan

    2015-01-01

    Full Text Available A finite element (FE approach with zero-thickness cohesive interface elements is presented to simulate collapse of continuum structures. The element removal technique merged with the general contact algorithm is adapted in the FE approach to achieve modeling for a transition from continua to discontinua, that is, fracture, fragmentation, and collapse. Collapse process of Meihua masonry arch dam, which is a famous disaster in dam engineering in China, is simulated and the failure mechanism is studied. The collapse process obtained from the presented procedure coincides with the field observation after the dam failure. The failure of Meihua arch dam can be attributed to reducing shear strength of the peripheral joint between the dam body and the concrete pedestal by daubing a layer of asphalt there. With low sliding resistance strength, the masonry dam body may slide upwards along the peripheral joint under hydrostatic pressure, leading to weakening of the arch action, fracturing, and final collapse of the dam.

  13. Theory and methods of global stability analysis for high arch dam

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    The global stability of high arch dam is one of the key problems in the safety study of arch dams,but no feasible method with theoretical basis is available.In this paper,based on the stability theory of mechanical system,it is demonstrated that the global failure of high arch dams belongs to a physical instability starting from local strength failure,which is the extreme point instability according to the characteristics of load-displacement curve obtained from the failure process of dam-foundation system. So the global failure of dam-foundation system should be studied with the stability theory of mechanical system.It is also pointed out that the current stability analysis methods used in engineering are consistent with the stability theory,but not established according to the mechanical system stability theory directly.A perfect method can be obtained through the study of physical disturbance equations.

  14. Research of air-cushion isolation effects on high arch dam reservoir

    Science.gov (United States)

    Zhang, Shao-Jie; Chen, Jiang; Zhang, Yuan-Ze; Liu, Hao-Wu

    2011-10-01

    A three-dimensional (3D) finite element model of air-cushion isolated arch dam is presented with the nonlinear gas-liquid-solid multi-field dynamic coupling effect taken into account. In this model, the displacement formulation in Lagrange method, pressure formulation in Euler method, nonlinear contact model based on Coulomb friction law are applied to the air-cushion, reservoir and contraction joint domain, respectively. The dynamic response of Jinping I arch dam with a height of 305 m is analyzed using the seismic records of the Wenchuan Earthquake in 2008. Numerical results show that the air-cushion isolation reduces significantly the hydrodynamic pressure as well as the opening width for the contraction joints of high arch dam.

  15. Damage propagation in a masonry arch subjected to slow cyclic and dynamic loadings

    Directory of Open Access Journals (Sweden)

    J. Toti

    2014-07-01

    Full Text Available In the present work, the damage propagation of a masonry arch induced by slow cyclic and dynamic loadings is studied. A two-dimensional model of the arch is proposed. A nonlocal damage-plastic constitutive law is adopted to reproduce the hysteretic characteristics of the masonry material, subjected to cyclic static loadings or to harmonic dynamic excitations. In particular, the adopted cohesive model is able to take into account different softening laws in tension and in compression, plastic strains, stiffness recovery and loss due to crack closure and reopening. The latter effect is an unavoidable feature for realistically reproducing hysteretic cycles. In the studied case, an inverse procedure is used to calibrate the model parameters. Then, nonlinear static and dynamic responses of the masonry arch are described together with damage propagation paths.

  16. Common variable immunodeficiency syndrome with right aortic arch: a case report

    Directory of Open Access Journals (Sweden)

    Erbay Riza

    2004-02-01

    Full Text Available Abstract Background Common variable immunodificiency syndrome predominantly affects adults. It is characterized by low production of all the major classes of immunoglobulins. We report a case of common variable immunodeficiency syndrome with right aortic arch. An association of right-sided arch and common variable immunodificiency syndrome has not been previously reported. Case presentation A 41-year-old female patient presented with a history of recurrent pneumonia, sinusitis, otitis media, diarrhoea, cystitis since childhood. Biochemical and immunocytochemical analysis revealed common variable immunodeficiency syndrome and radiological evaluation confirmed right aortic arch and aberrant left subclavian artery. Conclusion Common variable immunodeficiency syndrome syndrome is a clinical entity that should be kept in mind in patients with recurrent infections of different sites.

  17. Vibration analysis of the Second Saikai Bridge—a concrete filled tubular (CFT) arch bridge

    Science.gov (United States)

    Yoshimura, Mistuhiro; Wu, Qingxiong; Takahashi, Kazuo; Nakamura, Shozo; Furukawa, Kazuyoshi

    2006-02-01

    Concrete-filled steel tubular (CFT) arch bridges have been rapidly developing in China since 1990. Research has focused on the static behavior, thermal stress and erection technique, however, and there has been very little research of natural vibrations and dynamic responses of these bridges. Japan's first CFT arch bridge in highway bridges, the Second Saikai Bridge, is now under construction in Nagasaki Prefecture. Furthermore, this bridge has a pedestrian bridge that is suspended under the girder, which is rare. Therefore, the natural vibration properties are examined, and the influence of pedestrian bridge structure on the natural vibration of main bridge is discussed first. Response analysis under a moving vehicle and pedestrian is carried out, and the response characteristics and response level are clarified. The natural vibrations and responses are compared to those of CFT arch bridges that have been constructed in China. Results show the fine performance of both main bridge and pedestrian bridge of the Second Saikai Bridge.

  18. Estimation and asymptotic inference in the first order AR-ARCH model

    DEFF Research Database (Denmark)

    Lange, Theis; Rahbek, Anders; Jensen, Søren Tolver

    2011-01-01

    This article studies asymptotic properties of the quasi-maximum likelihood estimator (QMLE) for the parameters in the autoregressive (AR) model with autoregressive conditional heteroskedastic (ARCH) errors. A modified QMLE (MQMLE) is also studied. This estimator is based on truncation of individual...... terms of the likelihood function and is related to the recent so-called self-weighted QMLE in Ling (2007b). We show that the MQMLE is asymptotically normal irrespectively of the existence of finite moments, as geometric ergodicity alone suffice. Moreover, our included simulations show that the MQMLE...... for the QMLE to be asymptotically normal. Finally, geometric ergodicity for AR-ARCH processes is shown to hold under mild and classic conditions on the AR and ARCH processes....

  19. FLOOD DISCHARGE AND ENERGY DISSIPATION BY JETS FROM OUTLETS IN HIGH ARCH DAM

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    In this thesis, the downstream local rock-bed scour by multiple layered jets and by the collision of water jets in vertical and transverse directions were studied and the stability of the inverted arch cushion pool were analyzed. The velocity distribution of an aerated jet running dwon in the pool is obtained, a new method to calculate the scour depth by multiple layered jets and by the collision of water jets was proposed, and a muthematical model to forecast the critical downstream depth as a slab with various specific gravity destructions was established. The results were verified by experimental research on the hydrodynamic pressure produced at gaps of the inverted arch type of wate cushion pool and by using an advanced measurement and the imitation method experiments on forces at both arch spandrels were carried out to find their characteristics.

  20. Unilateral hyperplasia of the left posterior arch and associated vertebral schisis at C6 level

    Energy Technology Data Exchange (ETDEWEB)

    Esposito, Giuseppe; Bonis, Pasquale de; Tamburrini, Gianpiero; Massimi, Luca; Rocco, Concezio di [Catholic University, School of Medicine, Department of Pediatric Neurosurgery, Rome (Italy); Byvaltsev, Vadim [Irkutsk Railway Clinical Hospital, Department of Neurosurgery, Irkutsk (Russian Federation); Leone, Antonio [Catholic University, School of Medicine, Department of Bioimaging and Radiological Sciences, Rome (Italy)

    2009-12-15

    We report on a 5-year-old girl with unilateral hyperplasia of the left posterior arch of C6 associated with spina bifida occulta at the same level. Anteroposterior and lateral radiographs of the cervical spine showed hypertrophy of the left lamina as well as overgrowth and elongation of the left spinous process of the sixth cervical vertebra. Computed tomography (CT) examination better depicted this congenital variant and clearly showed the associated schisis of the posterior arch at the same level. Magnetic resonance (MR) imaging examination ruled out other spinal anomalies. The neck pain, the young age of the patient and the local aesthetic abnormality contributed to the surgical indication. To the best of our knowledge, this is the first case in the English literature of unilateral hyperplasia of a posterior cervical arch. Only one previous study has reported a similar congenital anomaly, but it was limited to the left side of the spinous process. (orig.)

  1. Feasibility of imaging superficial palmar arch using micro-ultrasound, 7T and 3T magnetic resonance imaging

    Science.gov (United States)

    Pruzan, Alison N; Kaufman, Audrey E; Calcagno, Claudia; Zhou, Yu; Fayad, Zahi A; Mani, Venkatesh

    2017-01-01

    AIM To demonstrate feasibility of vessel wall imaging of the superficial palmar arch using high frequency micro-ultrasound, 7T and 3T magnetic resonance imaging (MRI). METHODS Four subjects (ages 22-50 years) were scanned on a micro-ultrasound system with a 45-MHz transducer (Vevo 2100, VisualSonics). Subjects’ hands were then imaged on a 3T clinical MR scanner (Siemens Biograph MMR) using an 8-channel special purpose phased array carotid coil. Lastly, subjects’ hands were imaged on a 7T clinical MR scanner (Siemens Magnetom 7T Whole Body Scanner) using a custom built 8-channel transmit receive carotid coil. All three imaging modalities were subjectively analyzed for image quality and visualization of the vessel wall. RESULTS Results of this very preliminary study indicated that vessel wall imaging of the superficial palmar arch was feasible with a whole body 7T and 3T MRI in comparison with micro-ultrasound. Subjective analysis of image quality (1-5 scale, 1: poorest, 5: best) from B mode, ultrasound, 3T SPACE MRI and 7T SPACE MRI indicated that the image quality obtained at 7T was superior to both 3T MRI and micro-ultrasound. The 3D SPACE sequence at both 7T and 3T MRI with isotropic voxels allowed for multi-planar reformatting of images and allowed for less operator dependent results as compared to high frequency micro-ultrasound imaging. Although quantitative analysis revealed that there was no significant difference between the three methods, the 7T Tesla trended to have better visibility of the vessel and its wall. CONCLUSION Imaging of smaller arteries at the 7T is feasible for evaluating atherosclerosis burden and may be of clinical relevance in multiple diseases. PMID:28298968

  2. Comparative study of dental arch width in plaster models, photocopies and digitized images

    Directory of Open Access Journals (Sweden)

    Maria Cristina Rosseto

    2009-06-01

    Full Text Available The aim of this study was to comparatively assess dental arch width, in the canine and molar regions, by means of direct measurements from plaster models, photocopies and digitized images of the models. The sample consisted of 130 pairs of plaster models, photocopies and digitized images of the models of white patients (n = 65, both genders, with Class I and Class II Division 1 malocclusions, treated by standard Edgewise mechanics and extraction of the four first premolars. Maxillary and mandibular intercanine and intermolar widths were measured by a calibrated examiner, prior to and after orthodontic treatment, using the three modes of reproduction of the dental arches. Dispersion of the data relative to pre- and posttreatment intra-arch linear measurements (mm was represented as box plots. The three measuring methods were compared by one-way ANOVA for repeated measurements (α = 0.05. Initial / final mean values varied as follows: 33.94 to 34.29 mm / 34.49 to 34.66 mm (maxillary intercanine width; 26.23 to 26.26 mm / 26.77 to 26.84 mm (mandibular intercanine width; 49.55 to 49.66 mm / 47.28 to 47.45 mm (maxillary intermolar width and 43.28 to 43.41 mm / 40.29 to 40.46 mm (mandibular intermolar width. There were no statistically significant differences between mean dental arch widths estimated by the three studied methods, prior to and after orthodontic treatment. It may be concluded that photocopies and digitized images of the plaster models provided reliable reproductions of the dental arches for obtaining transversal intra-arch measurements.

  3. Correlation analysis of craniomandibular index and gothic arch tracing in patients with craniomandibular disorders

    Directory of Open Access Journals (Sweden)

    Todić Jelena

    2011-01-01

    Full Text Available Background/Aim. Complex etiology and symptomatology of craniomandibular dysfunction make the diagnosing and therapy of this disorder more difficult. The aim of this work was to assess the value of clinical and instrumental functional analyses in diagnosing of this type of disorders. Methods. In this study 200 subjects were examined, 15 with temporomandibular joint disorder. They were subjected to clinical functional analysis (Fricton-Shiffman and instrumental functional analysis by using the method of gothic arch. The parameters of the gothic arch records were analyzed and subsequently compared among the subjects of the observed groups. Results. In the examined group of the population 7.5% of them were with craniomandibular dysfunction. The most frequent symptoms were sound in temporomandibular joint, painful sensitivity of the muscles on palpation and lateral turning of the lower jaw while opening the mouth. By analyzing the gothic arch records and comparing the obtained values between the observed groups it was assessed that: lateral and protrusion movements, lateral amplitude and the size of gothic arch were much bigger in the healthy subjects, and latero-lateral asymmetry was larger in the sick subjects. Latero-lateral dislocation of apex was recorded only in the sick subjects with average values of 0.22 ± 0.130 mm. The correlation between the values of Fricton-Shiffman craniomandibular index and the parameters of the gothic arch records and latero-lateral amplitude and dislocation of apex records were established by correlative statistical analysis. Conclusion. Functional analysis of orofacial system and instrumental analysis of lower jaw movements (gothic arch method can be recommended as precise and simple methods in diagnosing craniomandibular dysfunctions.

  4. CORRECTION OF ALVEOLAR ARCH MALALIGNMENT AFTER TOTAL CORRECTION IN UNILATERAL AND BILATERAL GR III CLEFTS

    Directory of Open Access Journals (Sweden)

    Mohana Rao

    2015-06-01

    Full Text Available AIMS AND OBJECTIVES: Aim of this study is to document and analyse the pre - operative and postoperative alveolar arch impressions . MATERIALS AND METHODS: 20 cases of both unilateral and bilateral GR III clefts selected for this study. These pati ents were operated at the age of not less than 9 months, preferably below the age of 18 months. Below the age of 9 months general condition of these children may not cope up the duration of general anesthesia and amount of surgical trauma. After intubating the patient preoperatively, with the help of custom made metal arch plates, at first, Medical grade Alginate material with optimal hydration used to get negative impression, from these , positive impressions were obtained by the use of optimally hydrated m edical grade stone powder routinely used by dental surgeons. These positive impressions along with negative impression s and metal plates allowed to settle down for 10 hours undisturbed, after that positive impressions retrieved carefully without breaking a nd stored for analysis. Similarly postoperative impressions were taken after a gap of 2 years in the same manner like that of pre - operative ones under general anesthesia. Both impressions w ere compared and analysis was done regarding alveolar arch malalign ment, asymmetry and arch collapse correction. RESULTS & CONCLUSION: The status of the alveolar arch after single stage operation for cleft lip and palate in the unilateral cleft was much improved and there was considerable correction of the arch collapse a s well; in the bilateral cleft the correction of the premaxillary protrusion was better appreciated than the degree of correction of the alveolar gap.

  5. Representations of mad cow disease.

    Science.gov (United States)

    Washer, Peter

    2006-01-01

    This paper examines the reporting of the story of Bovine Spongiform Encephalopathy (BSE) and its human derivative variant Creutzfeld-Jacob Disease (vCJD) in the British newspapers. Three 'snapshots' of newspaper coverage are sampled and analysed between the period 1986 and 1996 focusing on how representations of the disease evolved over the 10-year period. Social representations theory is used to elucidate how this new disease threat was conceptualised in the newspaper reporting and how it was explained to the UK public. This paper examines who or what was said to be at risk from the new disease, and whether some individuals or groups held to blame for the diseases' putative origins, the appearance of vCJD in human beings, and its spread.

  6. 斜靠式系杆拱桥拱肋安装技术%The Installation Technology of Arch Ribs of Leaning Type CFST Arch Bridge

    Institute of Scientific and Technical Information of China (English)

    柳明佳

    2011-01-01

    通过南通新开北路通启运河大桥施工实例,介绍了斜靠式系杆拱桥的拱肋安装施工技术,并对影响拱肋安装精度的因素进行了分析,对如何控制做了简述。%This article introduces the installation and construction technology of arch ribs of leaning-type CFST arch bridge with the construction example of Nantong Tongqi canal bridge on North Xinkai road. And it also analyzes the factors of the accuracy of rib installation and makes a brief introduction of how to control.

  7. Mechanical effects of excavation rebound of arch dam bedrock and better concreting time of dam body

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    In high ground stress zone, rebound deformation of excavation of arch dam bedrock has a significant impact on the structural behavior, design and construction of arch dam. Based on the analysis of mechanical effects of excavation rebound, with both stress and deformation as two constraint conditions and deformation modulus as a controlling condition, the method to determine a better concreting time of dam body was put forward. All of these play an important guiding role in the excavation of dam bedrock and the construction of dam body.

  8. Numerical analysis of a circular arch buckling under the symmetric pressure

    Directory of Open Access Journals (Sweden)

    2006-01-01

    Full Text Available The many interesting phenomena, such as snap-through, nonuniqueness, and stability, of a circular arch subjected to the symmetric pressure are studied. The balance of forces of an elemental length leads to a governing equation which is used to investigate stable states of the arch. With specific opening angle 2a=π/3 , the sensitivities of angle and curvature at a base are surveyed for various of spring constants. The variations of angle and curvature at an edge are almost the same if the spring constant τ≥10 .

  9. CALCUL PAR ELEMENT FINI MIXTE DE LA FORME OPTIMALE DE L’ARCHE

    Directory of Open Access Journals (Sweden)

    A AYADI

    2000-06-01

    Full Text Available L’objectif de ce travail est d’optimiser des fonctionnelles liées à la forme de l’Arche et soumises à des contraintes. La méthode des éléments finis mixtes est très avantageuses pour ce type de problème en mécanique des structures. L’Arche se comporte d’une manière régulière par rapport à la forme ce qui conduit à la mise en œuvre de l’algorithme du gradient projeté.

  10. Normalized least-squares estimation in time-varying ARCH models

    OpenAIRE

    Fryzlewicz, Piotr; Sapatinas, Theofanis; Subba Rao, Suhasini

    2008-01-01

    We investigate the time-varying ARCH (tvARCH) process. It is shown that it can be used to describe the slow decay of the sample autocorrelations of the squared returns often observed in financial time series, which warrants the further study of parameter estimation methods for the model. ¶ Since the parameters are changing over time, a successful estimator needs to perform well for small samples. We propose a kernel normalized-least-squares (kernel-NLS) estimator which has a closed form...

  11. Asymptotic normality of the QMLE in the level-effect ARCH model

    DEFF Research Database (Denmark)

    Dahl, Christian Møller; Iglesias, Emma M.

    In this paper consistency and asymptotic normality of the quasi maximum like-lihood estimator in the level-effect ARCH model of Chan, Karolyi, Longstaff and Sanders (1992) is established. We consider explicitly the case where the parameters of the conditional heteroskedastic process...... are in the stationary region and discuss carefully how the results can be extended to the region where the conditional heteroskedastic process is nonstationary. The results illustrate that Jensen and Rahbek's (2004a,2004b) approach can be extended further than to traditional ARCH and GARCH models....

  12. Right aortic arch with aberrant left innominate artery: MR imaging findings

    Energy Technology Data Exchange (ETDEWEB)

    Midiri, M. [Istituto di Radiologia, Policlinico Universitario, Bari (Italy); Finazzo, M.; Lagalla, R.; De Maria, M. [Istituto di Radiologia ``Pietro Cignolini``, Policlinico Universitario, Palermo (Italy); Pilato, M. [Reparto di Cardiochirurgia, Palermo (Italy)

    1999-03-01

    A rare case of a 60-year-old man with a right aortic arch and aberrant left innominate artery is presented. This case had an unusual clinical presentation. The dysphagia appeared suddenly in adulthood, whereas vascular rings, when symptomatic, usually manifest early in childhood.To our knowledge, MR imaging findings of this anomaly have never been reported. The diagnosis was made by MR imaging and confirmed by surgery. Magnetic resonance imaging can replace angiography in the assessment of the aortic arch anomalies. (orig.) With 4 figs., 11 refs.

  13. Classification of the height and flexibility of the medial longitudinal arch of the foot

    Directory of Open Access Journals (Sweden)

    Nilsson Mette

    2012-02-01

    Full Text Available Abstract Background The risk of developing injuries during standing work may vary between persons with different foot types. High arched and low arched feet, as well as rigid and flexible feet, are considered to have different injury profiles, while those with normal arches may sustain fewer injuries. However, the cut-off values for maximum values (subtalar position during weight-bearing and range of motion (ROM values (difference between subtalar neutral and subtalar resting position in a weight-bearing condition for the medial longitudinal arch (MLA are largely unknown. The purpose of this study was to identify cut-off values for maximum values and ROM of the MLA of the foot during static tests and to identify factors influencing foot posture. Methods The participants consisted of 254 volunteers from Central and Northern Denmark (198 m/56 f; age 39.0 ± 11.7 years; BMI 27.3 ± 4.7 kg/m2. Navicular height (NH, longitudinal arch angle (LAA and Feiss line (FL were measured for either the left or the right foot in a subtalar neutral position and subtalar resting position. Maximum values and ROM were calculated for each test. The 95% and 68% prediction intervals were used as cut-off limits. Multiple regression analysis was used to detect influencing factors on foot posture. Results The 68% cut-off values for maximum MLA values and MLA ROM for NH were 3.6 to 5.5 cm and 0.6 to 1.8 cm, respectively, without taking into account the influence of other variables. Normal maximum LAA values were between 131 and 152° and normal LAA ROM was between -1 and 13°. Normal maximum FL values were between -2.6 and -1.2 cm and normal FL ROM was between -0.1 and 0.9 cm. Results from the multivariate linear regression revealed an association between foot size with FL, LAA, and navicular drop. Conclusions The cut-off values presented in this study can be used to categorize people performing standing work into groups of different foot arch types. The results of this

  14. Classification of the height and flexibility of the medial longitudinal arch of the foot

    Science.gov (United States)

    2012-01-01

    Background The risk of developing injuries during standing work may vary between persons with different foot types. High arched and low arched feet, as well as rigid and flexible feet, are considered to have different injury profiles, while those with normal arches may sustain fewer injuries. However, the cut-off values for maximum values (subtalar position during weight-bearing) and range of motion (ROM) values (difference between subtalar neutral and subtalar resting position in a weight-bearing condition) for the medial longitudinal arch (MLA) are largely unknown. The purpose of this study was to identify cut-off values for maximum values and ROM of the MLA of the foot during static tests and to identify factors influencing foot posture. Methods The participants consisted of 254 volunteers from Central and Northern Denmark (198 m/56 f; age 39.0 ± 11.7 years; BMI 27.3 ± 4.7 kg/m2). Navicular height (NH), longitudinal arch angle (LAA) and Feiss line (FL) were measured for either the left or the right foot in a subtalar neutral position and subtalar resting position. Maximum values and ROM were calculated for each test. The 95% and 68% prediction intervals were used as cut-off limits. Multiple regression analysis was used to detect influencing factors on foot posture. Results The 68% cut-off values for maximum MLA values and MLA ROM for NH were 3.6 to 5.5 cm and 0.6 to 1.8 cm, respectively, without taking into account the influence of other variables. Normal maximum LAA values were between 131 and 152° and normal LAA ROM was between -1 and 13°. Normal maximum FL values were between -2.6 and -1.2 cm and normal FL ROM was between -0.1 and 0.9 cm. Results from the multivariate linear regression revealed an association between foot size with FL, LAA, and navicular drop. Conclusions The cut-off values presented in this study can be used to categorize people performing standing work into groups of different foot arch types. The results of this study are important for

  15. Neonate with VACTERL Association and a Branchial Arch Anomaly without Hydrocephalus.

    Science.gov (United States)

    Velazquez, Danitza; Pereira, Elaine; Havranek, Thomas

    2016-03-01

    VACTERL (vertebral anomalies, anal atresia, cardiac defect, tracheoesophageal fistula, renal anomaly, limb anomalies) is an association of anomalies with a wide spectrum of phenotypic expression. While the majority of cases are sporadic, there is evidence of an inherited component in a small number of patients as well as the potential influence of nongenetic risk factors (maternal diabetes mellitus). Presence of hydrocephalus has been reported in VACTERL patients (VACTERL-H) in the past, with some displaying branchial arch anomalies. We report the unique case of an infant of diabetic mother with VACTERL association and a branchial arch anomaly-in the absence of hydrocephalus.

  16. Mathematical modeling and numerical analysis of thermal distribution in arch dams considering solar radiation effect.

    Science.gov (United States)

    Mirzabozorg, H; Hariri-Ardebili, M A; Shirkhan, M; Seyed-Kolbadi, S M

    2014-01-01

    The effect of solar radiation on thermal distribution in thin high arch dams is investigated. The differential equation governing thermal behavior of mass concrete in three-dimensional space is solved applying appropriate boundary conditions. Solar radiation is implemented considering the dam face direction relative to the sun, the slop relative to horizon, the region cloud cover, and the surrounding topography. It has been observed that solar radiation changes the surface temperature drastically and leads to nonuniform temperature distribution. Solar radiation effects should be considered in thermal transient analysis of thin arch dams.

  17. Enlarged Cross-section of The Stone Arch Bridge Strengthened by Technology Application%增大截面法加固石拱桥的技术应用

    Institute of Scientific and Technical Information of China (English)

    吴跃梓; 章劲松

    2012-01-01

    石拱桥是极具中华民族气息与特色的桥型,该桥型结构实用、美观.然而随着时代的变迁及交通运输业的发展,大量的石拱桥出现了各种各样的病害,很多桥甚至已发展成危桥.为改善交通状况,消除安全隐患,结合当前经济状况,加固利用旧危石拱桥是合理的.石拱桥加固的方法很多,结合工程实例重点阐述增大截面加固法加固石拱桥的基本原理、方法和步骤.%Stone arch bridge is a Chinese national flavor and characteristics of the bridge, the bridge type structure, beautiful and practical. However, with the change of times and the development of transportation industry, large stone arch bridges the emergence of a variety of diseases, many bridges has developed the deserted bridge. In order to improve traffic conditions, to eliminate potential safety problems, combined with the current economic situation, strengthening the old stone arch bridge is reasonable. Stone arch bridge reinforcement method, this paper focuses on the section- enlarging reinforcing method for reinforcing stone arch bridge, the basic principle of the method and steps.

  18. Treatment of flaring of the costal arch after the minimally invasive pectus excavatum repair (Nuss procedure) in children.

    NARCIS (Netherlands)

    Bosgraaf, R.P.; Aronson, D.C.

    2010-01-01

    Flaring of the costal arch may be part of the pectus excavatum deformity. This aspect will in rare cases be even worsen after the Nuss repair. This remaining deformity can be treated with a minimal subperichondral partial resection of the costal arch cartilage. In 5 patients, this additional techniq

  19. 78 FR 52973 - ICG Knott County, LLC, a Subsidiary of ICG, Inc., a Subsidiary of Arch Coal, Inc.; Including On...

    Science.gov (United States)

    2013-08-27

    ... Employment and Training Administration ICG Knott County, LLC, a Subsidiary of ICG, Inc., a Subsidiary of Arch... Regarding Application for Reconsideration for the workers and former workers of ICG Knott County, LLC, a... group eligibility of ICG Knott County, LLC, a subsidiary of ICG, Inc., a subsidiary of Arch Coal,...

  20. The artificial somato-autonomic reflex arch does not improve bowel function in subjects with spinal cord injury

    DEFF Research Database (Denmark)

    Rasmussen, Mikkel Mylius; Krogh, Klaus; Clemmensen, Dorte;

    2015-01-01

    Study design: Prospective cohort study. Objective: Although introduced for neurogenic bladder dysfunction, it has been suggested that the artificial somato-autonomic reflex arch alleviates neurogenic bowel dysfunction (NBD). We aimed at evaluating the effects of the reflex arch on NBD. Setting...

  1. Foot medial longitudinal-arch deformation during quiet standing and gait in subjects with medial tibial stress syndrome

    DEFF Research Database (Denmark)

    Bandholm, Thomas Quaade; Boysen, Lisbeth; Haugaard, Stine;

    2008-01-01

    The objective of this study was to investigate (1) if subjects with medial tibial stress syndrome demonstrate increased navicular drop and medial longitudinal-arch deformation during quiet standing and gait compared with healthy subjects, and (2) the relationship between medial longitudinal-arch ...

  2. Biomechanical consequences of plantar fascial release or rupture during gait: part I--disruptions in longitudinal arch conformation.

    Science.gov (United States)

    Sharkey, N A; Ferris, L; Donahue, S W

    1998-12-01

    To examine whether conformational changes induced by plantar fascial division may progress during gait, we loaded the feet of seven cadavers using an apparatus that simulates the actions of the extrinsic plantarflexors. We measured the effects of plantar fasciotomy at two instants in the terminal-stance phase of gait. Radiographic measurements of height of the arch, base length of the arch, and talo first-metatarsal angle were used to assess contributions to arch support made by the plantar fascia, tibialis posterior, peroneus longus and brevis, and digital flexor muscles. Complete fasciotomy caused significant collapse of the arch in the sagittal plane. Early in terminal stance, at the instant after heel-off, mean height of the arch decreased from 47 to 45 mm. Late in terminal stance, at the instant preceding contralateral heel strike, mean height of the arch decreased from 46 to 43. Effects of division of the central band, though significant, were mild. Medial base length of the arch increased from 163 to 167 mm in the absence of tibialis posterior contraction at late terminal stance. Arch-supporting abilities of the other extrinsic muscles were insignificant.

  3. Reference points suitable for evaluation of the additional arch length required for leveling the curve of Spee

    Science.gov (United States)

    Cho, Yong-Hwa; Gang, Sung-Nam

    2016-01-01

    Objective The additional arch length required for leveling (AALL) the curve of Spee (COS) can be estimated by subtracting the two-dimensional (2D) arch circumference, which is the projection of the three-dimensional (3D) arch circumference onto the occlusal plane, from the 3D arch circumference, which represents the arch length after leveling the COS. The purpose of this study was to determine whether the cusp tips or proximal maximum convexities are more appropriate reference points for estimating the AALL. Methods Sixteen model setups of the mandibular arch with COS depths ranging from 0 mm to 4.7 mm were constructed using digital simulation. Arch circumferences in 2D and 3D were measured from the cusp tips and proximal maximum convexities and used to calculate the AALL. The values obtained using the two reference points were compared with the paired t-test. Results Although the 3D arch circumference should be constant regardless of the COS depth, it decreased by 3.8 mm in cusp tip measurements and by 0.4 mm in proximal maximum convexity measurements as the COS deepened to 4.7 mm. AALL values calculated using the cusp tips as reference points were significantly smaller than those calculated using the proximal maximum convexities (p = 0.002). Conclusions The AALL is underestimated when the cusp tips are used as measurement reference points; the AALL can be measured more accurately using the proximal maximum convexities. PMID:27896209

  4. Maxillary Arch Dimensions and Spectral Characteristics of Children with Cleft Lip and Palate Who Produce Middorsum Palatal Stops

    Science.gov (United States)

    Zajac, David J.; Cevidanes, Lucia; Shah, Sonam; Haley, Katarina L.

    2012-01-01

    Purpose: The purpose of this study was twofold: (a) to determine maxillary arch dimensions of children with repaired cleft lip and palate (CLP) who produced middorsum palatal stops and (b) to describe some spectral characteristics of middorsum palatal stops. Method: Maxillary arch width, length, and height dimensions and first spectral moments of…

  5. An Experimental Investigation of the Dynamic Behavior of an In-Plane MEMS Shallow Arch Under Electrostatic Excitation

    KAUST Repository

    Ramini, Abdallah

    2016-01-20

    We present experimental investigation of the nonlinear dynamics of a clamped-clamped in-plane MEMS shallow arch when excited by an electrostatic force. We explore the dynamic behaviors of the in-plane motion of the shallow arches via frequency sweeps in the neighborhood of the first resonance frequency. The shallow arch response is video microscopy recorded and analyzed by means of digital imaging. The experimental data show local softening behavior for small DC and AC loads. For high voltages, the experimental investigation reveals interesting dynamics, where the arch exhibits a dynamic snap-Through behavior. These attractive experimental results verify the previously reported complex behavior of in-plane MEMS arches and show promising results to implement these structures for variety of sensing and actuation applications. © Copyright 2015 by ASME.

  6. Implementation of Document Security Management Based on Jacob%基于Jacob的文档安全管理的实现

    Institute of Scientific and Technical Information of China (English)

    梁志罡

    2011-01-01

    The security of network is a hot problem now.Introduce a online-document management system, its goal is to protect the teacher’s intellectual property, it requires that the student role does not have permission to download or copy the document which are uploaded by teacher, and the teacher role could edit the documents with a browser on-line.Through analyzing the base characteristic and security demand of the document management system in the market, combine with my innovation and then construct a new-style document management system with Jacob and Webdav techniques.The implementation of this system indicates that it can do well in the function of document security and on-line editing, in addition, the system also can deal with a fairly request simultaneously.%网络的安全性问题是一个比较热点的问题.出于对教师的知识产权的保护,要求学生用户端不具备复制与下载ppt 和 word 等文档的权限,而教师用户端则需要具备在线实时更改文档内容的权限.通过分析当前市场上存在的文档系统的基本特点和安全性要求,并结合自己的创新,采用Jacob 以及 Webdav 等关键技术实现了一个新型的在线文档管理系统.系统实验结果表明本系统能够很好地实现文档的安全性保护以及文档在线编辑功能,同时本系统在性能上也能够应对比较大的并发访问.

  7. Overhead spine arch analysis of dairy cows from three-dimensional video

    Science.gov (United States)

    Abdul Jabbar, K.; Hansen, M. F.; Smith, M. L.; Smith, L. N.

    2017-02-01

    We present a spine arch analysis method in dairy cows using overhead 3D video data. This method is aimed for early stage lameness detection. That is important in order to allow early treatment; and thus, reduce the animal suffering and minimize the high forecasted financial losses, caused by lameness. Our physical data collection setup is non-intrusive, covert and designed to allow full automation; therefore, it could be implemented on a large scale or daily basis with high accuracy. We track the animal's spine using shape index and curvedness measure from the 3D surface as she walks freely under the 3D camera. Our spinal analysis focuses on the thoracic vertebrae region, where we found most of the arching caused by lameness. A cubic polynomial is fitted to analyze the arch and estimate the locomotion soundness. We have found more accurate results by eliminating the regular neck/head movements' effect from the arch. Using 22-cow data set, we are able to achieve an early stage lameness detection accuracy of 95.4%.

  8. Evaluation of the Occlusion and Arch Dimensions in the Primary Dentition of an Iranian Population

    Directory of Open Access Journals (Sweden)

    Maryam Talebi

    2013-12-01

    Full Text Available Introduction: The objective of this study was to gather information about normal occlusion and arch dimensions in the primary teeth of the children belonging to an Iranian population. Methods: This descriptive cross-sectional study was performed on 68 children from the city of Mashhad in the 3-5 age range. Dental arch dimensions, interrelationships of primary canine and second molars, overbite and overjet were evaluated. Results: Primate space was observed on both sides of the arch in 82.2% of the subjects. The most prevalent type of primary molar relationship was flush terminal plane (52.1% followed by distal step (31.3% and then mesial step (16.7%. The primary canine relationship was ranked in the descending order of prevalence as Class I (77.1%, Class II (13.5%, end-to-end (5.2% and Class III (4.2%. Normal overbite and normal overjet was observed in 50% and 81.3% of cases, respectively. Conclusion: This study provides an insight into the dental arch dimensions, occlusion, spacing and crowding in primary dentition in Iranian children. In most of the cases, primate space and flush terminal plane were observed.

  9. Evaluation of the Occlusion and Arch Dimensions in the Primary Dentition of an Iranian Population

    Directory of Open Access Journals (Sweden)

    Maryam Talebi

    2013-01-01

    Full Text Available Introduction: The objective of this study was to gather information about normal occlusion and arch dimensions in the primary teeth of the children belonging to an Iranian population. Methods: This descriptive cross-sectional study was performed on 68 children from the city of Mashhad in the 3-5 age range. Dental arch dimensions, interrelationships of primary canine and second molars, overbite and overjet were evaluated. Results: Primate space was observed on both sides of the arch in 82.2% of the subjects. The most prevalent type of primary molar relationship was flush terminal plane (52.1% followed by distal step (31.3% and then mesial step (16.7%. The primary canine relationship was ranked in the descending order of prevalence as Class I (77.1%, Class II (13.5%, end-to-end (5.2% and Class III (4.2%. Normal overbite and normal overjet was observed in 50% and 81.3% of cases, respectively. Conclusion: This study provides an insight into the dental arch dimensions, occlusion, spacing and crowding in primary dentition in Iranian children. In most of the cases, primate space and flush terminal plane were observed.

  10. Supravalvular aortic stenosis in adult with anomalies of aortic arch vessels and aortic regurgitation

    Science.gov (United States)

    Valente, Acrisio Sales; Alencar, Polyanna; Santos, Alana Neiva; Lobo, Roberto Augusto de Mesquita; de Mesquita, Fernando Antônio; Guimarães, Aloyra Guedis

    2013-01-01

    The supravalvular aortic stenosis is a rare congenital heart defect being very uncommon in adults. We present a case of supravalvular aortic stenosis in adult associated with anomalies of the aortic arch vessels and aortic regurgitation, which was submitted to aortic valve replacement and arterioplasty of the ascending aorta with a good postoperative course. PMID:24598962

  11. ENTRAINMENT OF THE BREATHING RHYTHM OF THE CARP BY IMPOSED OSCILLATION OF THE GILL ARCHES

    NARCIS (Netherlands)

    DEGRAAF, PJF; ROBERTS, BL

    1991-01-01

    Artificial oscillation imposed onto the gill arches could modify the respiratory rhythm in the carp Cyprinus carpio. The degree of modification depended upon the frequency and amplitude of the applied movement. Oscillation at frequencies close to the spontaneous respiratory rhythm and at amplitudes

  12. Multimodal optical measurement in vitro of surface deformations and wall thickness of the pressurized aortic arch.

    Science.gov (United States)

    Genovese, Katia; Humphrey, Jay D

    2015-04-01

    Computational modeling of arterial mechanics continues to progress, even to the point of allowing the study of complex regions such as the aortic arch. Nevertheless, most prior studies assign homogeneous and isotropic material properties and constant wall thickness even when implementing patient-specific luminal geometries obtained from medical imaging. These assumptions are not due to computational limitations, but rather to the lack of spatially dense sets of experimental data that describe regional variations in mechanical properties and wall thickness in such complex arterial regions. In this work, we addressed technical challenges associated with in vitro measurement of overall geometry, full-field surface deformations, and regional wall thickness of the porcine aortic arch in its native anatomical configuration. Specifically, we combined two digital image correlation-based approaches, standard and panoramic, to track surface geometry and finite deformations during pressurization, with a 360-deg fringe projection system to contour the outer and inner geometry. The latter provided, for the first time, information on heterogeneous distributions of wall thickness of the arch and associated branches in the unloaded state. Results showed that mechanical responses vary significantly with orientation and location (e.g., less extensible in the circumferential direction and with increasing distance from the heart) and that the arch exhibits a nearly linear increase in pressure-induced strain up to 40%, consistent with other findings on proximal porcine aortas. Thickness measurements revealed strong regional differences, thus emphasizing the need to include nonuniform thicknesses in theoretical and computational studies of complex arterial geometries.

  13. Double aortic arch with double aneuploidy-rare anomaly in combined Down and Klinefelter syndrome

    NARCIS (Netherlands)

    Gerretsen, M.F.; Peelen, W.; Rammeloo, L.A.J.; Koolbergen, D.R.; Hruda, J.

    2009-01-01

    A 14-month-old boy with double aneuploidy and a double aortic arch suffered from frequently recurrent severe feeding and respiratory problems. Chromosomal analysis showed a 48,XXY + 21 karyotype: a double aneuploidy of Down syndrome (DS) and Klinefelter syndrome (KS). Only four cases of double aneup

  14. An abused five-month-old girl: Hangman's fracture or congenital arch defect?

    NARCIS (Netherlands)

    Rijn, R.R. van; Kool, D.R.; Witt-Hamer, P.C. de; Majoie, C.B.

    2005-01-01

    Hangman's fractures are a rare finding in childhood. In case of suspected or proven child abuse, differentiation with a congenital defect of the posterior arch of C2 is essential. We present the case of a 5-month-old girl, who had a history of being physically abused by one of her caretakers. On the

  15. Decayed/missing/filled teeth and shortened dental arches in Tanzanian adults.

    NARCIS (Netherlands)

    Sarita, P.T.N.; Witter, D.J.; Kreulen, C.M.; Matee, M.I.N.; Hof, M.A. van 't; Creugers, N.H.J.

    2004-01-01

    PURPOSE: This study assessed decayed/missing/filled teeth (DMFT), presence of occlusal units, and prevalence of shortened dental arches in a Tanzanian adult population. MATERIALS AND METHODS: The dental state of samples of the Tanzanian population was studied. Oral examinations were conducted on 5,5

  16. Cephalic arch stenosis in autogenous brachiocephalic hemodialysis fistulas: results of cutting balloon angioplasty

    DEFF Research Database (Denmark)

    Heerwagen, Søren Thorup; Lönn, Lars; Schroeder, Torben V;

    2010-01-01

    Cephalic arch stenosis is a known cause of hemodialysis access failure in patients with brachiocephalic fistulas (BCFs). Outcomes of endovascular treatment are affected by resistance of the stenosis to balloon dilation, a high vein rupture rate and the development of early restenosis. The purpose...

  17. Cyclic behavior test of a new double-arch steel gate

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A new double-arch structure for the gate used as tidal barrage and sluice was adopted in Caoe River Dam in China. It was a spatial structure made up of the right arch, the invert arch, the chord, etc., and was designed to bear bilateral loads. To research the cyclic behavior of the new double-arch structure, a scale-model cyclic test was conducted. First, the test setup and test method were presented in detail, and according to the test results, the cyclic behavior and failure characteristics of this structure were discussed. Then by analyzing the test cyclic envelope curve, it was found the curve was divided into three stages: the elastic stage, the local plastic stage and the failure stage at the local yield point and structural yield point. The gate model has local yield strength and structural yield strength, with both their values being bigger than that of the designing load. Therefore, the gate is safe enough for the projects. At last, dynamic property of the gate was analyzed considering additional mass of the water. It was found that the tidal bore shock would not cause resonance vibration of the gate.

  18. Influence of underground water seepage flow on surrounding rock deformation of multi-arch tunnel

    Institute of Scientific and Technical Information of China (English)

    LI Xi-bing; ZHANG Wei; LI Di-yuan; WANG Qi-sheng

    2008-01-01

    Based on a typical multi-arch tunnel in a freeway, the fast Lagrangian analysis of continua in 3 dimensions(FLAC3D) was used to calculate the surrounding rock deformation of the tunnel under which the effect of underground water seepage flow was taken into account or not. The distribution of displacement field around the multi-arch tunnel, which is influenced by the seepage field, was gained. The result indicates that the settlement values of the vault derived from coupling analysis are bigger when considering the seepage flow effect than that not considering. Through the contrast of arch subsidence quantities calculated by two kinds of computation situations, and the comparison between the calculated and measured value of tunnel vault settlement, it is found that the calculated value(5.7-6.0 mm) derived from considering the seepage effect is more close to the measured value(5.8-6.8 mm).Therefore, it is quite necessary to consider the seepage flow effect of the underground water in aquiferous stratum for multi-arch tunnel design.

  19. Effect of dental arch convexity and type of archwire on frictional forces

    NARCIS (Netherlands)

    Fourie, Zacharias; Ozcan, Mutlu; Sandham, John

    2009-01-01

    Introduction: Friction measurements in orthodontics are often derived from models by using brackets placed on flat models with various straight wires. Dental arches are convex in some areas. The objectives of this study were to compare the frictional forces generated in conventional flat and convex

  20. Stationary solution and parametric estimation for Bilinear model driven by ARCH noises

    Institute of Scientific and Technical Information of China (English)

    潘家柱; 李国栋; 谢衷洁

    2002-01-01

    Bilinear model driven by ARCH (1) noises is proposed. Existence, uniqueness and form of sta-tionary solution to this new model are presented. Maximum likelihood estimation of the model is discussedand some simulation results are given to evaluate our algorithm.

  1. Function of the triceps surae muscle group in low and high arched feet: an exploratory study.

    Science.gov (United States)

    Branthwaite, Helen; Pandyan, Anand; Chockalingam, Nachiappan

    2012-06-01

    The Achilles tendon has been shown to be comprised of segmental components of tendon arising from the tricpes surae muscle group. Motion of the foot joints in low and high arched feet may induce a change in behaviour of the triceps surae muscle group due to altered strain on the tendon. Surface electromyogram of the medial and lateral gastrocnemius and the soleus muscle from 12 subjects (with 6 low arched and 6 high arched feet) (1:1) was recorded whilst walking at a self selected speed along a 10m walkway. The results showed a high variability in muscle activity between groups with patterns emerging within groups. Soleus was more active in 50% of the low arch feet at forefoot loading and there was a crescendo of activity towards heel lift in 58% of all subjects. This observed variability between groups and foot types emphasises the need for further work on individual anatomical variation and foot function to help in the understanding and management of Achilles tendon pathologies and triceps surae dysfunction.

  2. The seismic response of concrete arch bridges (with focus on the Bixby Creek bridge Carmel, California)

    Energy Technology Data Exchange (ETDEWEB)

    Hoehler, M; McCallen, D; Noble, C

    1999-06-01

    The analysis, and subsequent retrofit, of concrete arch bridges during recent years has relied heavily on the use of computational simulation. For seismic analysis in particular, computer simulation, typically utilizing linear approximations of structural behavior, has become standard practice. This report presents the results of a comprehensive study of the significance of model sophistication (i.e. linear vs. nonlinear) and pertinent modeling assumptions on the dynamic response of concrete arch bridges. The study uses the Bixby Creek Bridge, located in California, as a case study. In addition to presenting general recommendations for analysis of this class of structures, this report provides an independent evaluation of the proposed seismic retrofit for the Bixby Creek Bridge. Results from the study clearly illustrate a reduction of displacement drifts and redistribution of member forces brought on by the inclusion of material nonlinearity. The analyses demonstrate that accurate modeling of expansion joints, for the Bixby Creek Bridge in particular, is critical to achieve representative modal and transient behavior. The inclusion of near-field displacement pulses in ground motion records was shown to significantly increase demand on the relatively softer, longer period Bixby Creek Bridge arch. Stiffer, shorter period arches, however, are more likely susceptible to variable support motions arising from the canyon topography typical for this class of bridges.

  3. Posterior arch bifocal fracture of the atlas vertebra: a variant of Jefferson fracture.

    Science.gov (United States)

    Abuamara, S; Dacher, J N; Lechevallier, J

    2001-07-01

    Fracture of the atlas vertebra is rare in children. We report two paediatric cases of bifocal pedicular fracture of the posterior arch of C1. Evaluation was performed by nonenhanced computed tomography scan, which successively confirmed both diagnosis and healing. In both cases, nonoperative management was successful.

  4. Dynamics of longitudinal arch support in relation to walking speed: contribution of the plantar aponeurosis.

    Science.gov (United States)

    Caravaggi, Paolo; Pataky, Todd; Günther, Michael; Savage, Russell; Crompton, Robin

    2010-09-01

    The plantar aponeurosis (PA), in spanning the whole length of the plantar aspect of the foot, is clearly identified as one of the key structures that is likely to affect compliance and stability of the longitudinal arch. A recent study performed in our laboratory showed that tension/elongation in the PA can be predicted from the kinematics of the segments to which the PA is attached. In the present investigation, stereophotogrammetry and inverse kinematics were employed to shed light on the mechanics of the longitudinal arch and its main passive stabilizer, the PA, in relation to walking speed. When compared with a neutral unloaded position, the medial longitudinal arch underwent greater collapse during the weight-acceptance phase of stance at higher walking speed (0.1 degrees +/-1.9 degrees in slow walking; 0.9 degrees +/-2.6 degrees in fast walking; P = 0.0368). During late stance the arch was higher (3.4 degrees +/-3.1 degrees in slow walking; 2.8 degrees +/-2.7 degrees in fast walking; P = 0.0227) and the metatarsophalangeal joints more dorsiflexed (e.g. at the first metatarsophalangeal joint, 52 degrees +/-5 degrees in slow walking; 64 degrees +/-4 degrees in fast walking; P plantar aspect of the foot when walking at faster speeds.

  5. The value of the Gothic arch tracing in the positioning of denture teeth.

    Science.gov (United States)

    el-Gheriani, A S; Winstanley, R B

    1988-07-01

    Twenty-five subjects of three nationalities carried out Gothic arch tracings. Measurements between the side arms were compared with the upper intercuspid distances measured in the same subjects. A relationship was found which may be of value in the setting up of anterior maxillary denture teeth.

  6. Home safely, everyone, everyday : the drive to an injury-free workplace at Arch Coal

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    2009-02-15

    This article described the efforts of one of the largest coal producers in the United States to improve the safety performance of its mine operations. Although St. Louis-based Arch Coal already had an industry-leading safety record, the company believed it was time to reach for the ultimate goal of zero injuries and environmental violations. In 2006, Arch Coal and its subsidiaries launched an initiative to adopt a tailored behaviour-based safety process at its major mining sites. Steering committees were selected at each location to develop a list of critical behaviours that could be observed by trained peers on the job. Safe and at-risk behaviours were thereby identified. Data from the observations were also tracked to identify trends and remove barriers. To date, nearly 1000 subsidiary employees have been trained as observers and 688 barriers to safe performance have been removed. In 2007, 10 Arch Coal subsidiary operations were completed without a single reportable safety incident, thus proving that zero is attainable. Arch Coal emphasized that more work has yet to be done until the perfect zero is achieved company-wide.

  7. Effect of serial extraction alone on crowding: relationships between tooth width, arch length, and crowding.

    Science.gov (United States)

    Yoshihara, T; Matsumoto, Y; Suzuki, J; Sato, N; Oguchi, H

    1999-12-01

    In this study, we examined the effect of serial extraction alone on crowding. We also investigated the relationships between tooth width, arch length, and irregularity index. Maxillary dental casts from 32 subjects who had undergone only serial extraction were analyzed at 3 stages: before deciduous canines extraction, after first premolars extraction, and at the end of the observation period. The mean of the irregularity index decreased significantly as serial extraction proceeded and further decreased during the observation period. In cases where the width of the incisor was more than 2 standard deviations above the means for the control subjects, there was a significant correlation between tooth width of the lateral incisors and irregularity index before extraction as well as a significant correlation between the summation of tooth widths of the central and lateral incisors and irregularity index at that time. There was a significant negative correlation between arch length discrepancy and irregularity index before extraction and also a significant correlation between arch length discrepancy and correction of the irregularity index from before deciduous canines extraction to after first premolars extraction. These results suggest that tooth width and arch length discrepancy might preferentially affect the degree of anterior crowding in cases of severe crowding. There was no aggravation of the average crowding level during the observation period in the present study. The present study quantitatively suggested that serial extraction was useful for the purpose of correcting crowding in most cases.

  8. Optimization design of foundation excavation for Xiluodu super-high arch dam in China

    Institute of Scientific and Technical Information of China (English)

    Qixiang Fan; Shaowu Zhou; Ning Yang

    2015-01-01

    With better understanding of the quality and physico-mechanical properties of rocks of dam foundation, and the physico-mechanical properties and structure design of arch dam in association with the foun-dation excavation of Xiluodu arch dam, the excavation optimization design was proposed for the foundation surface on the basis of feasibility study. Common analysis and numerical analysis results demonstrated the feasibility of using the weakly weathered rocks III1 and III2 as the foundation surface of super-high arch dam. In view of changes in the geological conditions at the dam foundation along the riverbed direction, the design of extending foundation surface excavation area and using consolidating grouting and optimizing structure of dam bottom was introduced, allowing for harmonization of the arch dam and foundation. Three-dimensional (3D) geomechanics model test and finite element analysis re-sults indicated that the dam body and foundation have good overload stability and high bearing capacity. The monitoring data showed that the behaviors of dam and foundation correspond with the designed patterns in the construction period and the initial operation period.

  9. Optimization design of foundation excavation for Xiluodu super-high arch dam in China

    Directory of Open Access Journals (Sweden)

    Qixiang Fan

    2015-04-01

    Full Text Available With better understanding of the quality and physico-mechanical properties of rocks of dam foundation, and the physico-mechanical properties and structure design of arch dam in association with the foundation excavation of Xiluodu arch dam, the excavation optimization design was proposed for the foundation surface on the basis of feasibility study. Common analysis and numerical analysis results demonstrated the feasibility of using the weakly weathered rocks III1 and III2 as the foundation surface of super-high arch dam. In view of changes in the geological conditions at the dam foundation along the riverbed direction, the design of extending foundation surface excavation area and using consolidating grouting and optimizing structure of dam bottom was introduced, allowing for harmonization of the arch dam and foundation. Three-dimensional (3D geomechanics model test and finite element analysis results indicated that the dam body and foundation have good overload stability and high bearing capacity. The monitoring data showed that the behaviors of dam and foundation correspond with the designed patterns in the construction period and the initial operation period.

  10. Transversal changes in dental arches from non-extraction treatment with self ligating brackets

    Directory of Open Access Journals (Sweden)

    Liliana Avila Maltagliati

    2013-06-01

    Full Text Available OBJECTIVE: The present study aimed at analyzing, with the use of dental casts, the transverse changes of the upper and lower dental arches, after non-extraction orthodontic treatment, with self-ligating brackets. METHODS: The sample comprised 29 patients, all presenting Class I malocclusion with upper and lower crowding of at least 4 mm and treated only with a fixed appliance, without stripping, extraction or distalization. The dental casts were obtained before and after leveling with 0.019 x 0.025-in stainless steel archwires. CONCLUSION: The results indicated that the majority of transverse changes occurred at the premolar areas, both the first and the second, as well as on the upper and lower dental arches. The intercanine distance increased 0.75 mm, on average, in the upper arch and 1.96 mm in the lower arch. The molars also demonstrated a tendency towards an increase in their transverse dimension, however, at a lower intensity comparing to premolars. All measurements presented statistically significant differences with the exception of the maxillary second molars.

  11. Three-Dimensional Aquila Rift: Magnetized HI Arch Anchored by Molecular Complex

    CERN Document Server

    Sofue, Yoshiaki

    2016-01-01

    Three dimensional structure of the Aquila Rift of magnetized neutral gas is investigated by analyzing HI and CO line data. The projected distance on the Galactic plane of the HI arch of the Rift is ~250 pc from the Sun. The HI arch emerges at l~ 30 deg, reaches to altitudes as high as ~ 500 pc above the plane at l~ 350deg, and returns to the disk at l~270 deg. The extent of arch at positive latitudes is ~1 kpc and radius is ~100 pc. The eastern root is associated with the giant molecular cloud complex, which is the main body of the optically defined Aquila Rift. The HI and molecular masses of the Rift are estimated to be M_HI~1.4x10^5Msun and M_H2 ~3x10^5 Msun. Gravitational energies to lift the gases to their heights are E_grav: HI ~1.4x10^51 and E_grav: H_2 ~0.3x10^51 erg, respectively. Magnetic field is aligned along the HI arch of the Rift, and the strength is measured to be B~10 microG using Faraday rotation measures of extragalactic radio sources. The magnetic energy is estimated to be E_mag~1.2x10^51 e...

  12. A quadrant tray and bite registration as an alternative to dual-arch impressions for fixed prosthetics: a clinical and dental laboratory technique.

    Science.gov (United States)

    Hammond, Barry D; Myers, Michael L; Haywood, Van B

    2011-01-01

    To perform fixed prosthodontic procedures, dentists take a full-arch or quadrant impression and articulate the casts. The dual-arch impression technique is a popular quadrant technique for crown fabrication. The technique described in this article, which uses a quadrant impression and separate interocclusal record, offers several advantages over the traditional dual-arch method.

  13. Including Functional Annotations and Extending the Collection of Structural Classifications of Protein Loops (ArchDB

    Directory of Open Access Journals (Sweden)

    Antoni Hermoso

    2007-01-01

    Full Text Available Loops represent an important part of protein structures. The study of loop is critical for two main reasons: First, loops are often involved in protein function, stability and folding. Second, despite improvements in experimental and computational structure prediction methods, modeling the conformation of loops remains problematic. Here, we present a structural classification of loops, ArchDB, a mine of information with application in both mentioned fields: loop structure prediction and function prediction. ArchDB (http://sbi.imim.es/archdb is a database of classified protein loop motifs. The current database provides four different classification sets tailored for different purposes. ArchDB-40, a loop classification derived from SCOP40, well suited for modeling common loop motifs. Since features relevant to loop structure or function can be more easily determined on well-populated clusters, we have developed ArchDB-95, a loop classification derived from SCOP95. This new classification set shows a ∼40% increase in the number of subclasses, and a large 7-fold increase in the number of putative structure/function-related subclasses. We also present ArchDB-EC, a classification of loop motifs from enzymes, and ArchDB-KI, a manually annotated classification of loop motifs from kinases. Information about ligand contacts and PDB sites has been included in all classification sets. Improvements in our classification scheme are described, as well as several new database features, such as the ability to query by conserved annotations, sequence similarity, or uploading 3D coordinates of a protein. The lengths of classified loops range between 0 and 36 residues long. ArchDB offers an exhaustive sampling of loop structures. Functional information about loops and links with related biological databases are also provided. All this information and the possibility to browse/query the database through a web-server outline an useful tool with application in the

  14. Total aortic arch replacement: superior ventriculo-arterial coupling with decellularized allografts compared with conventional prostheses.

    Directory of Open Access Journals (Sweden)

    Alexander Weymann

    Full Text Available To date, no experimental or clinical study provides detailed analysis of vascular impedance changes after total aortic arch replacement. This study investigated ventriculoarterial coupling and vascular impedance after replacement of the aortic arch with conventional prostheses vs. decellularized allografts.After preparing decellularized aortic arch allografts, their mechanical, histological and biochemical properties were evaluated and compared to native aortic arches and conventional prostheses in vitro. In open-chest dogs, total aortic arch replacement was performed with conventional prostheses and compared to decellularized allografts (n = 5/group. Aortic flow and pressure were recorded continuously, left ventricular pressure-volume relations were measured by using a pressure-conductance catheter. From the hemodynamic variables end-systolic elastance (Ees, arterial elastance (Ea and ventriculoarterial coupling were calculated. Characteristic impedance (Z was assessed by Fourier analysis.While Ees did not differ between the groups and over time (4.1±1.19 vs. 4.58±1.39 mmHg/mL and 3.21±0.97 vs. 3.96±1.16 mmHg/mL, Ea showed a higher increase in the prosthesis group (4.01±0.67 vs. 6.18±0.20 mmHg/mL, P<0.05 in comparison to decellularized allografts (5.03±0.35 vs. 5.99±1.09 mmHg/mL. This led to impaired ventriculoarterial coupling in the prosthesis group, while it remained unchanged in the allograft group (62.5±50.9 vs. 3.9±23.4%. Z showed a strong increasing tendency in the prosthesis group and it was markedly higher after replacement when compared to decellularized allografts (44.6±8.3 dyn·sec·cm(-5 vs. 32.4±2.0 dyn·sec·cm(-5, P<0.05.Total aortic arch replacement leads to contractility-afterload mismatch by means of increased impedance and invert ventriculoarterial coupling ratio after implantation of conventional prostheses. Implantation of decellularized allografts preserves vascular impedance thereby improving

  15. Secular changes in tooth size and dental arch dimensions in the mixed dentition.

    Science.gov (United States)

    Lindsten, Rune

    2003-01-01

    Secular changes in the mixed dentition were studied. Permanent tooth size and dental arch dimensions were examined in Norwegian children born in the 1960s and 1980s, Swedish children born in the 1960s and 1980s, Norwegian Sami children born in the 1980s, and a sample of Norwegian skulls dating from the 14th to the 19th century. The Norwegian Sami children were nomadic in the summertime. A sample of pigs was studied before and after a maceration process to determine what dimensional changes might occur in such a process. A shrinkage of 0.3%-1.7% was found. This information was used when the skulls were compared with the modern groups. Lateral dental arch lengths were shorter in the children born in the 1960s compared with the children born in the 1980s. This was a result of the higher prevalence of caries in the second deciduous molars in the 1960s groups. Children who had lost a deciduous canine prematurely were found to have smaller dental arch perimeters. When compared with other data, this was blamed on a pre-existing crowding. Permanent tooth size was smaller in the skulls compared with the modern groups. Improved nutrition is considered to be the main reason for the difference. Relative dental arch space differed in the group born in the 1960s from that in the other groups, indicating a greater prevalence of crowding in the former. Relative dental arch space in the skulls and in the group born in the 1980s was similar. A more traditional way of living, as practised by the Sami group in this thesis, was not favorable for relative dental arch space. The transverse intermaxillary relation in boys changed from the 1960s to the 1980s, which indicated that the 1980s group ran a greater risk of developing a posterior cross-bite. Before the same conclusion could be made in the girls, the mesial drift of the first permanent molars had to be corrected for, because of a higher prevalence of caries in the 1960s group. The sex-pooled analysis of the skulls and the

  16. Analysis of Yielding Steel Arch Support with Rock Bolts in Mine Roadways Stability Aspect

    Science.gov (United States)

    Majcherczyk, Tadeusz; Niedbalski, Zbigniew; Małkowski, Piotr; Bednarek, łukasz

    2014-10-01

    The result of the search for new technological solutions in the field of support for roadways in coal mines has in recent years been the widespread use of steel arch with rockbolt support systems. The efficiency of these systems is affected among other things by the option of installing rock bolts after the actual driving the mine roadway, the increased load capacity that these systems can support, and their resistance to dynamic weight. Large variation in the way that these steel arch support can be connected using different types of rock bolts necessitates mining research revealing the effectiveness of such solutions. Although the steel arch with rockbolt support system is used in the majority of European coal mines, it is still not possible to apply templates of schemes due to the diversity of geological and mining conditions. Therefore, throughout a period of several years, the authors of this article conducted research in situ under conditions of different schemes related to connecting arched support frames with rock bolts, with only selected results being presented in the article. The measurements of convergence, load supported by the system frame, load supported by the rock bolts, and the stratification of roof rocks were analyzed, carried out in two roadways with yielding steel arch support in which strand bolts were applied. The article also proposes the index for working maintenance nuw, used in preliminarily assessing the stability of a given working with a limited number of data concerning geomechanical conditions. Additionally considered are empirical methods used in Poland for designing steel arch with rock bolt support systems. The results of mine research indicate that strengthening yielding steel support with strand bolts through steel beams maintains the stability of a roadway, even when exposed to the exploitation stress. Aside from the impact of exploitation, deformations of the support system are negligible, despite the fact that the tensile

  17. Multilineage differentiation of ectomesenchymal cells isolated from the first branchial arch.

    Science.gov (United States)

    Deng, M J; Jin, Y; Shi, J N; Lu, H B; Liu, Y; He, D W; Nie, X; Smith, A J

    2004-01-01

    Cranial neural crest-derived ectomesenchymal cells may be pluripotent stem cells that are capable of generating a range of phenotypes. The fate of these cells appears to be determined in part by intrinsic genetic programs and also by the influence of extracellular signals in the local environment. The extent of lineage determination once neural crest cells have migrated to the first branchial arch is not clear, although branchial arch pattern is not thought to be the result of crest predetermination. The aim of the present study was to test the hypothesis that ectomesenchymal cells of the first branchial arch show properties of pluripotent stem cells, the lineage of which may be directed by specific molecular signaling. Ectomesenchymal cells were enzymatically isolated from the mandibular processes of BALB/c mice and maintained in an undifferentiated state while cultured with leukemia inhibitory factor or induced to differentiate by lineage-specific induction factors or growth conditions, including transforming growth factor beta, forskolin, and a mineralization-promoting medium. Morphological observations and immunocytochemistry demonstrated that cells could be induced to differentiate into smooth muscle cells, glial cells, and osteoblasts, respectively. In the presence of the mineralization-promoting medium, alkaline phosphatase activity increased significantly and mineralization nodules formed. The data reported support the concept that many, although not all, first branchial arch-derived ectomesenchymal cells show properties of multipotent stem cells, the subsequent fate of which can be influenced by induction factors and growth conditions. Some cells, however, showed a degree of commitment with respect to their fate. The possible application of first branchial arch-derived stem cells to tissue engineering of the orofacial tissues should involve consideration of the developmental stage of cell harvesting and the desired cell fate.

  18. Effect of medial arch-heel support in inserts on reducing ankle eversion: a biomechanics study

    Directory of Open Access Journals (Sweden)

    Yung Patrick SH

    2008-02-01

    Full Text Available Abstract Background Excessive pronation (or eversion at ankle joint in heel-toe running correlated with lower extremity overuse injuries. Orthotics and inserts are often prescribed to limit the pronation range to tackle the problem. Previous studies revealed that the effect is product-specific. This study investigated the effect of medial arch-heel support in inserts on reducing ankle eversion in standing, walking and running. Methods Thirteen pronators and 13 normal subjects participated in standing, walking and running trials in each of the following conditions: (1 barefoot, and shod condition with insert with (2 no, (3 low, (4 medium, and (5 high medial arch-heel support. Motions were captured and processed by an eight-camera motion capture system. Maximum ankle eversion was calculated by incorporating the raw coordinates of 15 anatomical positions to a self-compiled Matlab program with kinematics equations. Analysis of variance with repeated measures with post-hoc Tukey pairwise comparisons was performed on the data among the five walking conditions and the five running conditions separately. Results Results showed that the inserts with medial arch-heel support were effective in dynamics trials but not static trials. In walking, they successfully reduced the maximum eversion by 2.1 degrees in normal subjects and by 2.5–3.0 degrees in pronators. In running, the insert with low medial arch support significantly reduced maximum eversion angle by 3.6 and 3.1 degrees in normal subjects and pronators respectively. Conclusion Medial arch-heel support in inserts is effective in reducing ankle eversion in walking and running, but not in standing. In walking, there is a trend to bring the over-pronated feet of the pronators back to the normal eversion range. In running, it shows an effect to restore normal eversion range in 84% of the pronators.

  19. A quantitative method for defining high-arched palate using the Tcof1(+/-) mutant mouse as a model.

    Science.gov (United States)

    Conley, Zachary R; Hague, Molly; Kurosaka, Hiroshi; Dixon, Jill; Dixon, Michael J; Trainor, Paul A

    2016-07-15

    The palate functions as the roof of the mouth in mammals, separating the oral and nasal cavities. Its complex embryonic development and assembly poses unique susceptibilities to intrinsic and extrinsic disruptions. Such disruptions may cause failure of the developing palatal shelves to fuse along the midline resulting in a cleft. In other cases the palate may fuse at an arch, resulting in a vaulted oral cavity, termed high-arched palate. There are many models available for studying the pathogenesis of cleft palate but a relative paucity for high-arched palate. One condition exhibiting either cleft palate or high-arched palate is Treacher Collins syndrome, a congenital disorder characterized by numerous craniofacial anomalies. We quantitatively analyzed palatal perturbations in the Tcof1(+/-) mouse model of Treacher Collins syndrome, which phenocopies the condition in humans. We discovered that 46% of Tcof1(+/-) mutant embryos and new born pups exhibit either soft clefts or full clefts. In addition, 17% of Tcof1(+/-) mutants were found to exhibit high-arched palate, defined as two sigma above the corresponding wild-type population mean for height and angular based arch measurements. Furthermore, palatal shelf length and shelf width were decreased in all Tcof1(+/-) mutant embryos and pups compared to controls. Interestingly, these phenotypes were subsequently ameliorated through genetic inhibition of p53. The results of our study therefore provide a simple, reproducible and quantitative method for investigating models of high-arched palate.

  20. ArchSim: A System-Level Parallel Simulation Platform for the Architecture Design of High Performance Computer

    Institute of Scientific and Technical Information of China (English)

    Yong-Qin Huang; Hong-Liang Li; Xiang-Hui Xie; Lei Qian; Zi-Yu Hao; Feng Guo; Kun Zhang

    2009-01-01

    High performance computer(HPC)is a complex huge system,of which the architecture design meets increasing difficulties and risks.Traditional methods,such as theoretical analysis,component-level simulation and sequential simulation,are not applicable to system-level simulations of HPC systems.Eyen the parallel simulation using large-scale parallel machines also have many difficulties in scalability,reliability,generality,as well as efficiency.According to the current needs of HPC architecture design,this paper proposes a system-level parallel simulation platform:ArchSim.We first introduce the architecture of ArchSim simulation platform which is composed of a global server(GS),local server agents(LSA)and entities.Secondly,we emphasize some key techniques of ArchSim,including the synchronization protocol,the communication mechanism and the distributed checkpointing/restart mechanism.We then make a synthesized test of some main performance indices of ArchSim with the phold benchmark and analyze the extra overhead generated by ArchSim.Finally,based on ArchSim.we construct a parallel event-driven interconnection network simulator and a system-level simulator for a small scale HPC system with 256 processors.The results of the performance test and HPC system simulations demonstrate that ArchSim can achieve high speedup ratio and high scalability on parallel host machine and support system-level simulations for the architecture design of HPC systems.

  1. A protocol for classifying normal- and flat-arched foot posture for research studies using clinical and radiographic measurements

    Directory of Open Access Journals (Sweden)

    Menz Hylton B

    2009-07-01

    Full Text Available Abstract Background There are several clinical and radiological methods available to classify foot posture in research, however there is no clear strategy for selecting the most appropriate measurements. Therefore, the aim of this study was to develop a foot screening protocol to distinguish between participants with normal- and flat-arched feet who would then subsequently be recruited into a series of laboratory-based gait studies. Methods The foot posture of ninety-one asymptomatic young adults was assessed using two clinical measurements (normalised navicular height and arch index and four radiological measurements taken from antero-posterior and lateral x-rays (talus-second metatarsal angle, talo-navicular coverage angle, calcaneal inclination angle and calcaneal-first metatarsal angle. Normative foot posture values were taken from the literature and used to recruit participants with normal-arched feet. Data from these participants were subsequently used to define the boundary between normal- and flat-arched feet. This information was then used to recruit participants with flat-arched feet. The relationship between the clinical and radiographic measures of foot posture was also explored. Results Thirty-two participants were recruited to the normal-arched study, 31 qualified for the flat-arched study and 28 participants were classified as having neither normal- or flat-arched feet and were not suitable for either study. The values obtained from the two clinical and four radiological measurements established two clearly defined foot posture groups. Correlations among clinical and radiological measures were significant (p r = 0.24 to 0.70. Interestingly, the clinical measures were more strongly associated with the radiographic angles obtained from the lateral view. Conclusion This foot screening protocol provides a coherent strategy for researchers planning to recruit participants with normal- and flat-arched feet. However, further research is

  2. Finite element model for arch bridge vibration dynamics considering effect of suspender length adjustment on geometry stiffness matrix

    Institute of Scientific and Technical Information of China (English)

    ZHONG Yi-feng; WANG Rui; YING Xue-gang; CHEN Huai

    2006-01-01

    In this paper, we established a finite element (FEM) model to analyze the dynamic characteristics of arch bridges. In this model, the effects of adjustment to the length of a suspender on its geometry stiffness matrix are stressed. The FEM equations of mechanics characteristics, natural frequency and main mode are set up based on the first order matrix perturbation theory. Applicantion of the proposed model to analyze a real arch bridge proved the improvement in the simulation precision of dynamical characteristics of the arch bridge by considering the effects of suspender length variation.

  3. Stenting of Variant Left Carotid Artery Using Brachial Artery Approach in a Patient with Unusual Type of Bovine Aortic Arch

    Directory of Open Access Journals (Sweden)

    Emre Gürel

    2016-01-01

    Full Text Available Bovine aortic arch is the most frequently encountered variation in human aortic arch branching. A 63-year-old Asian male presented with symptomatic severe stenosis of left carotid artery originating from the brachiocephalic trunk. Selective engagement to the left carotid artery was unsuccessful using transfemoral approach. We reported on a successful left carotid artery stenting case using right brachial artery approach in a bovine aortic arch. This paper is worthy of reporting in terms of guiding physicians for interventional procedures in these types of challenging cases.

  4. DISEASES

    DEFF Research Database (Denmark)

    Pletscher-Frankild, Sune; Pallejà, Albert; Tsafou, Kalliopi;

    2015-01-01

    Text mining is a flexible technology that can be applied to numerous different tasks in biology and medicine. We present a system for extracting disease-gene associations from biomedical abstracts. The system consists of a highly efficient dictionary-based tagger for named entity recognition...... of human genes and diseases, which we combine with a scoring scheme that takes into account co-occurrences both within and between sentences. We show that this approach is able to extract half of all manually curated associations with a false positive rate of only 0.16%. Nonetheless, text mining should...... not stand alone, but be combined with other types of evidence. For this reason, we have developed the DISEASES resource, which integrates the results from text mining with manually curated disease-gene associations, cancer mutation data, and genome-wide association studies from existing databases...

  5. Association of Aortic Calcification on Plain Chest Radiography with Obstructive Coronary Artery Disease

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Yeong Han; Chang, Jeong Ho [Dept. of Diagnostic Radiology, Daegu Catholic University Hospital, Daegu (Korea, Republic of); Park, Jong Sam [Dept. of Radiologic Tecnology, Daegu Health College, Daegu (Korea, Republic of)

    2009-03-15

    This study was conducted to determine an association between aortic calcification viewed on plain chest radiography and obstructive coronary artery disease. Retrospective review of all chest radiography obtained from consecutive patients undergoing coronary angiography. Chest PA images were reviewed by technical radiologist and radiologist. Considering the presence of aortic arch calcification, images were compared with the results of coronary angiography. In addition, the size of aortic arch calcification were divided into two groups - the smaller and the larger than 10 mm. Among the total 846 patients, the number of the patients with obstructive coronary artery disease is total 417 (88.3%) in males and 312 (83.4%) in females. Considering the presence of aortic arch calcification, the positive predictive value of relation between aortic arch calcification and obstructive coronary artery disease was 91.4% and the relative risk of the group with aortic arch calcification to the opposite group was 1.10. According to the size of aortic arch calcification and obstructive coronary artery disease, the positive predictive value was 91.9% and the relative risk between two groups was 1.04. This study shows that aortic calcification was closely associated with obstructive coronary artery disease. If the aortic calcification is notified on plain chest radiography, we strongly recommend to consult with doctor.

  6. 刚架拱桥破坏机理的分析%A Study of the Failure Mechanism of the Framed Arch Bridge

    Institute of Scientific and Technical Information of China (English)

    姚良云; 陈燊

    2012-01-01

    Base on the framed arch bridge mechanical behavior, a solid model of batter brace by means of ANSYS program is established to analysis the Failure Mechanism of the Framed Arch Bridge. In order to do further research, using the MIDAS/Civil model, the number of lateral bracing is gradually reduced, and the influence of the lateral bracing on the global stiffness of the bridge is concluded, the reason of the disease of the lateral bracing has been found, that is the thrust produced by the micro--bend plate. And it has been found that the height of the the vault section and outer upper chard is not enough, which is the main reasons of the failure.%本文根据刚架拱桥结构的受力特性建立全桥及局部实体模型分析刚架拱桥的破坏机理,文中利用MIDAS/Civil模型,逐步减少模型中的横系梁,以考察横向联系的破坏对桥梁整体性的影响,研究表明由于微弯板产生的水平推力导致了横系梁的破坏,跨中截面和外弦杆破坏主要原因为截面高度不够。

  7. Experiment Study on Normal Section Bearing Capacity of Masonry Arch?Bridge Reinforced with Composite Arch Ring%复合拱圈加固圬工拱桥正截面承载力试验研究

    Institute of Scientific and Technical Information of China (English)

    乔文靖; 孙克东; 李成华

    2016-01-01

    In order to research on normal section bearing capacity of masonry arch bridge that is strengthened by composite arch ring under cracks of original arch ring,the three sectional models of masonry arch bridge strengthened by composite arch circle are designed,considering the cracks of original arch ring and the mechanical properties of different materials,numerical simulation and experimental research are carried out based on common stress and deformation coordination between the original arch ring and reinforced layer.The results show:When the crack width is 1/4 original arch width,the bearing capacity is 14.5% less than the non crack arch segment;When the crack width is 1/2 original arch width,the bearing capacity is 3 7 .3% less than the non crack arch segment;The bearing capacity decreases in proportion of the increased crack width.%为了研究原拱圈在裂缝作用下,复合拱圈加固圬工拱桥的正截面承载力计算问题,建立了3个复合拱圈加固圬工拱桥节段模型,考虑原拱圈的裂缝和不同材料的力学性能,基于原拱圈和加固层共同受力和协调变形,进行了数值模拟和试验研究.结果表明:当裂缝宽度为原拱圈宽度1/4时,实测承载力比无裂缝拱段减少了14.5%;当裂缝宽度为原拱圈宽度1/2时,实测承载力比无裂缝拱段减少了37.3%,裂缝增大使承载力成比例减小.

  8. Crucial technologies in High the design of Xiluodu Super Arch Dam

    Institute of Scientific and Technical Information of China (English)

    Wang Renkun

    2012-01-01

    Some super high arch dams ( SHADs), like Xiluodu Arch Dam, after their heights reaching the magnitude of 300 m, confront lots of technical challenges in design and construction. Several crucial technologies of 6 SHADs will be reviewed and discussed in this and consecutive papers, including Xiluodu, Jinping I in China, Baktiary in Iran, ete. , on the topics of the research method, criterion for evaluation and engineering application of dam safety analysis and evaluation, reasonable dam base interface, dam shape optimization, comprehensive treatments of complex foundation, anti-seismic engineering, dam construction material, concrete placement and temperature control, instrumentation and monitoring of dam operation, etc. This paper will mainly focus on the overall safety of SHADs, reasonable dam base interface analysis and evaluation and their engineering application.

  9. Ambient modal testing of a double-arch dam: the experimental campaign and model updating

    Science.gov (United States)

    García-Palacios, Jaime H.; Soria, José M.; Díaz, Iván M.; Tirado-Andrés, Francisco

    2016-09-01

    A finite element model updating of a double-curvature-arch dam (La Tajera, Spain) is carried out hereof using the modal parameters obtained from an operational modal analysis. That is, the system modal dampings, natural frequencies and mode shapes have been identified using output-only identification techniques under environmental loads (wind, vehicles). A finite element model of the dam-reservoir-foundation system was initially created. Then, a testing campaing was then carried out from the most significant test points using high-sensitivity accelerometers wirelessly synchronized. Afterwards, the model updating of the initial model was done using a Monte Carlo based approach in order to match it to the recorded dynamic behaviour. The updated model may be used within a structural health monitoring system for damage detection or, for instance, for the analysis of the seismic response of the arch dam- reservoir-foundation coupled system.

  10. Density Forecasts of Crude-Oil Prices Using Option-Implied and ARCH-Type Models

    DEFF Research Database (Denmark)

    Tsiaras, Leonidas; Høg, Esben

      The predictive accuracy of competing crude-oil price forecast densities is investigated for the 1994-2006 period. Moving beyond standard ARCH models that rely exclusively on past returns, we examine the benefits of utilizing the forward-looking information that is embedded in the prices...... of derivative contracts. Risk-neutral densities, obtained from panels of crude-oil option prices, are adjusted to reflect real-world risks using either a parametric or a non-parametric calibration approach. The relative performance of the models is evaluated for the entire support of the density, as well...... obtained by option prices and non-parametric calibration methods over those constructed using historical returns and simulated ARCH processes....

  11. Density forecasts of crude-oil prices using option-implied and ARCH-type models

    DEFF Research Database (Denmark)

    Høg, Esben; Tsiaras, Leonicas

    2011-01-01

    The predictive accuracy of competing crude-oil price forecast densities is investigated for the 1994–2006 period. Moving beyond standard ARCH type models that rely exclusively on past returns, we examine the benefits of utilizing the forward-looking information that is embedded in the prices...... of derivative contracts. Risk-neutral densities, obtained from panels of crude-oil option prices, are adjusted to reflect real-world risks using either a parametric or a non-parametric calibration approach. The relative performance of the models is evaluated for the entire support of the density, as well...... obtained by option prices and non-parametric calibration methods over those constructed using historical returns and simulated ARCH processes. © 2010 Wiley Periodicals, Inc. Jrl Fut Mark...

  12. Dinosaur tracks from the Cedar Mountain Formation (Lower Cretaceous), Arches National Park, Utah

    Science.gov (United States)

    Lockley, M.G.; White, D.; Kirkland, J.; Santucci, V.

    2004-01-01

    The seventh and largest known dinosaur tracksite from the Cedar Mountain Formation is reported from two important stratigraphic levels in the Ruby Ranch Member within the boundaries of Arches National Park. Previous reports of sites with a few isolated tracks are of limited utility in indicating the fauna represented by track makers. The Arches site reveals evidence of several theropod morphotypes, including a possible match for the coelurosaur Nedcolbertia and an apparently didactyl Utahraptor-like dromeosaurid. Sauropod tracks indicate a wide-gauge morphotype (cf. Brontopodus). Ornithischian tracks suggest the presence of an iguandontid-like ornithopod and a large ankylosaur. Dinosaur track diversity is high in comparison with other early Cretaceous vertebrate ichnofaunas, and it correlates well with faunal lists derived from skeletal remains, thus providing a convincing census of the known fauna. ?? Taylor and Francis Inc.

  13. Construction Simulation and Real-Time Control for High Arch Dam

    Institute of Scientific and Technical Information of China (English)

    ZHONG Denghua; REN Bingyu; WU Kangxin

    2008-01-01

    A method of combining dynamic simulation with real-time control was proposed to fit the randomness and uncertainty in the high arch dam construction process. The mathematical logic model of high arch dam construction process was established. By combining dynamic con-struction simulation with schedule analysis, the process of construction schedule forecasting and analysis based on dynamic simulation was studied. The process of real-time schedule control was constructed and some measures for dynamic adjustment and control of construction schedule were provided. A system developed with the method is utilized in a being constructed hydroelectric pro-ject located at the Yellow River in northwest China, which can make the pouring plan of the dam in the next stage (a month, cluarter or year) to guide the practical construction. The application result shows that the system provides an effective technical support for the construction and manage-ment of the dam.

  14. Evaluation of dental arch changes in patients following the use of Y shape appliance expansion

    Directory of Open Access Journals (Sweden)

    Ahmad Akhondi MS

    2001-09-01

    Full Text Available The purpose of this study was to evaluate Y shape appliance for expansion on maxillary arch of patients in their mixed dentition age. Eight patients, 6 girls and 2 boys, with maxillary constriction, retrusion of maxillary anteriors, and space deficiency of upper canine were treated by Y-plate expansion. For each patient 8 parameters on upper cast and 7 parameters on lower cast were measured. Statistical analysis was conducted by calculating the mean, standard deviation and p-value, of parameters. Since these parameters change during natural growth, the results were compared to normal growth changes of similar patients group form another study as control. Results showed significant increase in maxillary and mandibular cervical and coronal intercanine and intermolar width (P<0.005. The results also showed significant increase in maxillary arch length and perimeter.

  15. Magnetic resonance imaging of coarctation of the aorta and postoperative interrupted aortic arch

    Energy Technology Data Exchange (ETDEWEB)

    Kakizawa, Hideyuki; Tanaka, Takashi; Takada, Osamu; Nakayama, Shingo; Ogata, Hiroshi; Zuguchi, Masayuki (Tohoku Univ., Sendai (Japan). School of Medicine)

    1991-03-01

    ECG-gated MRI was performed at 1.5 T on 9 patients with coarctation of the aorta and restensis of the aorta after previous aortoplasty for coarctation of the aorta or interrupted aortic arch. The age of the patients ranged from 7 days to 3.3 years. MRI was more useful in assessing the severity of stenosis than echocardiography. Four patients had balloon dilation angioplasty for restenosis of the aorta. MRI was also useful in deciding the appropriate balloon size for angioplasty, and follow up after treatment. However, MRI could not always visualize the whole lesion in one slice, especially when the course of the aortic arch was not on the same plane. (author).

  16. Determining the Optimal Placement of Sensors on a Concrete Arch Dam Using a Quantum Genetic Algorithm

    Directory of Open Access Journals (Sweden)

    Kai Zhu

    2016-01-01

    Full Text Available Structural modal identification has become increasingly important in health monitoring, fault diagnosis, vibration control, and dynamic analysis of engineering structures in recent years. Based on an analysis of traditional optimization algorithms, this paper proposes a novel sensor optimization criterion that combines the effective independence (EFI method with the modal strain energy (MSE method. Considering the complex structure and enormous degrees of freedom (DOFs of modern concrete arch dam, a quantum genetic algorithm (QGA is used to optimize the corresponding sensor network on the upstream surface of a dam. Finally, this study uses a specific concrete arch dam as an example and determines the optimal sensor placement using the proposed method. By comparing the results with the traditional optimization methods, the proposed method is shown to maximize the spatial intersection angle among the modal vectors of sensor network and can effectively resist ambient perturbations, which will make the identified modal parameters more precise.

  17. Gastric and masticatory performances in full-arch immediate loading rehabilitated patients.

    Science.gov (United States)

    Pesce, P; Menini, M; Furnari, M; Pera, F; Tealdo, T; Pera, P

    2015-09-01

    Full-arch immediate loading implant rehabilitations provide patients with compromised dentition an effective treatment to improve their aesthetic and function. Aim of this prospective cohort study was to investigate the correlation between masticatory ability and gastric emptying rates among these patients. Ten subjects (five men and five women) with compromised dentition were tested in two occasions: before treatment and 30 days after the immediate loading rehabilitation. Masticatory ability was evaluated using the sieves test, and the gastric half emptying time (T(1/2)) was assessed by means of the 13C-octanoic acid breath test. A statistically significant increment (P rehabilitated with full-arch immediate implant prostheses present a significant improvement of the gastric process.

  18. New Insight into the Toughening Mechanisms of Seashell: From Arch Shape to Multilayer Structure

    Directory of Open Access Journals (Sweden)

    Quan Yuan

    2016-01-01

    Full Text Available A seashell is a closed three-dimensional curved surface formed by two symmetrical open shells. Three-point bending is performed on a pure aragonite straight beam (PASB model and a multilayer structure curved beam (MSCB model to elucidate the structure-property relationships of seashells. The integrity of the PASB is broken because of the introduction of a soft layer, but this drawback is compensated by the peculiar arch shape and the internal multilayer structure. The effective modulus, stiffness, and fracture energy of MSCB increase with an increase in volume fraction, aspect ratio of aragonite platelet, overlap ratio of hard layers, and ratio of the elastic modulus of the hard layer to the shear modulus of the soft layer. New design disciplines drawn from the MSCB model are peculiar arch shape, internal multilayer structure of larger volume fraction, and aspect ratio of hard layers and nanoscaled soft layers.

  19. Numerical analysis of ultimate strength of concrete filled steel tubular arch bridges

    Institute of Scientific and Technical Information of China (English)

    XIE Xu; CHEN Heng-zhi; Li Hui; SONG Shi-rui

    2005-01-01

    The calculation of ultimate bearing capacity is a significant issue in the design of Concrete Filled Steel Tubular (CFST)arch bridges. Based on the space beam theory, this paper provides a calculation method for determining the ultimate strength of CFST structures. The accuracy of this method and the applicability of the stress-strain relationships were validated by comparing different existing confined concrete uniaxial constitutive relationships and experimental results. Comparison of these results indicated that this method using the confined concrete uniaxial stress-strain relationships can be used to calculate the ultimate strength and CFST behavior with satisfactory accuracy. The calculation results are stable and seldom affected by concrete constitutive relationships. The method is therefore valuable in the practice of engineering design. Finally, the ultimate strength of an arch bridge with span of 330 m was investigated by the proposed method and the nonlinear behavior was discussed.

  20. Microsimulations of Arching, Clogging, and Bursty Exit Phenomena in Crowd Dynamics

    CERN Document Server

    Castro, Francisco Enrique Vicente G

    2015-01-01

    We present in this paper the behavior of an artificial agent who is a member of a crowd. The behavior is based on the social comparison theory, as well as the trajectory mapping towards an agent's goal considering the agent's field of vision. The crowd of artificial agents were able to exhibit arching, clogging, and bursty exit rates. We were also able to observe a new phenomenon we called double arching, which happens towards the end of the simulation, and whose onset is exhibited by a "calm" density graph within the exit passage. The density graph is usually bursty at this area. Because of these exhibited phenomena, we can use these agents with high confidence to perform microsimulation studies for modeling the behavior of humans and objects in very realistic ways.

  1. Molekulargenetische und archäologische Untersuchungen zur Domestikation und Züchtung des Schweins (Sus scrofa)

    OpenAIRE

    Krause-Kyora, Ben

    2011-01-01

    Die Arbeit behandelt die Domestikation der Stammart des europäischen Wildschweins (Sus scrofa) und den Beginn und Umsetzung der Schweinehaltung im nordmitteleuropäischen Raum mit Hilfe von archäologischen und genetischen Analysemethoden.

  2. Cephalic arch stenosis in dialysis patients: review of clinical relevance, anatomy, current theories on etiology and management.

    Science.gov (United States)

    Sivananthan, Gajan; Menashe, Leo; Halin, Neil J

    2014-01-01

    Arteriovenous hemodialysis fistulas (AVFs) serve as a lifeline for many individuals with end-stage renal failure. A common cause of AVF failure is cephalic arch stenosis. Its high prevalence compounded with its resistance to treatment makes cephalic arch stenosis important to understand. Proposed etiologies include altered flow in a fistulized cephalic vein, external compression by fascia, the unique morphology of the cephalic arch, large number of valves in the cephalic outflow tract and biochemical changes that accompany renal failure. Management options are also in debate and include angioplasty, cutting balloon angioplasty, bare metal stents, stent grafts and surgical techniques including flow reduction with minimally invasive banding as well as more invasive venovenostomy with transposition surgeries for refractory cases. In this review, the evidence for the clinical relevance of cephalic arch stenosis, its etiology and management are summarized.

  3. 57. Growth of left ventricular outflow tract after repair of ventricular septal defect and aortic arch obstruction

    Directory of Open Access Journals (Sweden)

    Abdulraouf Jijeh

    2015-10-01

    Conclusion: There is significant LVOT growth expected after repair of VSD and aortic arch obstruction. Small aortic valve and LVOT at diagnosis of those cases are not correlating with the need of surgical reintervention for LVOT obstruction.

  4. Video-assisted thoracoscopic left lower lobectomy in a patient with lung cancer and a right aortic arch

    Directory of Open Access Journals (Sweden)

    Wada Hideyuki

    2012-11-01

    Full Text Available Abstract A right aortic arch is a rare congenital anomaly, with a reported incidence of around 0.1%. A patient with a right aortic arch underwent video-assisted thoracic surgery left lower lobectomy and mediastinal lymph node dissection for squamous cell carcinoma. There was no aortic arch or descending aorta in the left thoracic cavity, but the esophagus. There was no anomaly in the location or branching of the pulmonary vessels, the bronchi, and the lobulation of the lungs. The vagus nerve was found at the level of the left pulmonary artery. The arterial ligament was found between the left subclavian artery and the left pulmonary artery. The recurrent laryngeal nerve was recurrent around the left subclavian artery. A Kommerell diverticulum was found at the origin of the left subclavian artery. The patient experienced no complications. We conclude that video-assisted thoracoscopic lobectomy with mediastinal dissection is feasible for treating lung cancer with a right aortic arch.

  5. Oregon Islands, Three Arch Rocks, and Cape Meares National Wildlife Refuges: Comprehensive Conservation Plan and Wilderness Stewardship Plan

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This Comprehensive Conservation Plan (CCP) was written to guide management on Oregon Islands, Three Arch Rocks, and Cape Meares NWRs for the next 15 years. This plan...

  6. Left-Sided Patent Ductus Arteriosus in a Right-Sided Aortic Arch

    Directory of Open Access Journals (Sweden)

    Ming-Yen Ng

    2014-01-01

    Full Text Available We present a 31-year-old female with repaired tetralogy of Fallot (TOF and right-sided aortic arch (RAA with left-sided patent ductus arteriosus (PDA originating from the left brachiocephalic artery. This is a rare finding but most common site for a PDA in TOF and a RAA. To the best of our knowledge, this is the first demonstration of this rare finding on MRI in the literature.

  7. Impression technique for a complete-arch prosthesis with multiple implants using additive manufacturing technologies.

    Science.gov (United States)

    Revilla-León, Marta; Sánchez-Rubio, José Luis; Oteo-Calatayud, Jesús; Özcan, Mutlu

    2016-11-23

    This article describes an impression technique for a complete-arch prosthesis supported by multiple implants where additive manufacturing technologies were used to fabricate a splinting framework and a custom tray. The technique presented uses a shim method to control the homogenous splinting acrylic resin and impression material during the procedure, thereby reducing laboratory and chairside time and the number of impression copings and laboratory analogs needed.

  8. Bin-objective shape optimization based on linear programming model of arch dam

    Institute of Scientific and Technical Information of China (English)

    JIN Hai; LIN Gao; YANG Ming-sheng

    2007-01-01

    Bin-objective shape optimization of arch dam based on linear programming model is discussed to minimize both dam volume and maximal tensile stress. The importance of weight coefficient of the above two objectives is chosen according to the value of importance ratio. The influence of weight coefficient to the optimization result is discussed in detail and the numerical example shows that both the model and method proposed is doable.

  9. Three-dimensional dental arch curvature in human adolescents and adults.

    Science.gov (United States)

    Ferrario, V F; Sforza, C; Poggio, C E; Serrao, G; Colombo, A

    1999-04-01

    The three-dimensional arrangement of dental cusps and incisal edges in human dentitions has been reported to fit the surface of a sphere (the curve of Monson), with a radius of about 4 inches in adults. The objective of the current study was to compare the three-dimensional curvature of the mandibular dental arch in healthy permanent dentitions of young adults and adolescents. The mandibular casts of 50 adults (aged 19 to 22 years) and 20 adolescents (aged 12 to 14 years) with highly selected sound dentitions that were free from temporomandibular joint problems were obtained. The three coordinates of cusp tips excluding the third molars were digitized with a three-dimensional digitizer, and used to derive a spherical model of the curvature of the occlusal surfaces. From the best interpolating sphere, the radii of the left and right curves of Spee (quasi-sagittal plane) and of molar curve of Wilson (frontal plane) were computed. Mandibular arch size (interdental distances) was also calculated. The occlusal curvature of the mandibular arch was not significantly influenced by sex, although a significant effect of age was found (Student t, P curves of Spee, and curve of Wilson in the molar area were about 101 mm in adults, and about 80 mm in adolescents. Arch size was not influenced by either sex or age. The different curvatures of the occlusal plane in adolescents and adults may be explained by a progressive rotation of the major axis of the teeth moving the occlusal plane toward a more buccal position. These dental movements should be performed in a frontal plane on an anteroposterior axis located next to the dental crown.

  10. Right-Sided Aortic Arch with Aberrant Left Subclavian Artery from Kommerell's Diverticulum

    Directory of Open Access Journals (Sweden)

    M.Y. Mubarak

    2011-06-01

    Full Text Available A previously healthy 52-year-old man had a chest radiograph for medical check-up and found to have a right-sided aortic arch. Computed tomography of the thorax revealed a right-sided aorticarch with aberrant left subclavian artery originated from Kommerell's diverticulum. Barium swallow examination showed compression of the posterior wall of the esophagus. He was asymptomatic and no surgical intervention was performed.

  11. Hybrid palliation of interrupted aortic arch in a high-risk neonate

    Directory of Open Access Journals (Sweden)

    Karimi Mohsen

    2010-01-01

    Full Text Available We report a case of a high-risk neonate with interrupted aortic arch (IAA and ventricular septal defect who underwent a successful hybrid palliative procedure using a ductal stent and bilateral branch pulmonary artery banding. This case represents not only a successful use of hybrid approach in high-risk neonates with IAA, but also introduces an alternative and safe access for ductal stent insertion through the right ventricular infundibulum.

  12. Nonsyndromic bilateral multiple retained primary incisors in mandibular arch: Rare case report

    Directory of Open Access Journals (Sweden)

    D Deepa

    2016-01-01

    Full Text Available A disturbed eruption process creates a clinical situation that is challenging to diagnose and treat. The clinical arena of tooth eruption disorders includes both syndromic and nonsyndromic problems varying from delayed eruption to a complete failure of eruption or sometimes retained primary teeth. This paper reports a rare case of retained bilateral primary incisors on mandibular arch in a systemically healthy patient with eruption of the permanent central and lateral incisors bilaterally.

  13. Fixation of a severely resorbed mandible for complete arch screw-retained rehabilitation: A clinical report.

    Science.gov (United States)

    Fabris, Vinicius; Bacchi, Atais

    2016-05-01

    Severely resorbed mandibles with placed endosteal dental implants can fracture. Therefore, techniques to reduce the risk or minimize the consequences of these fractures are needed. This clinical report presents a technique for placing a titanium plate in a severely resorbed mandible subjected to complete-arch implant therapy. The titanium plate is placed in the same surgical procedure as the implants, allowing immediate implant loading. This technique provides safe implant-supported treatment for patients with severe mandibular resorption.

  14. Three-Dimensional Aquila Rift: Magnetized HI Arch Anchored by Molecular Complex

    Science.gov (United States)

    Sofue, Yoshiaki; Nakanishi, Hiroyuki

    2016-09-01

    Three dimensional structure of the Aquila Rift of magnetized neutral gas is investigated by analyzing HI and CO line data. The projected distance on the Galactic plane of the HI arch of the Rift is r⊥ ˜ 250 pc from the Sun. The HI arch emerges at l ˜ 30°, reaches to altitudes as high as ˜500 pc above the plane at l ˜ 350°, and returns to the disk at l ˜ 270°. The extent of arch at positive latitudes is ˜1 kpc and radius is ˜100 pc. The eastern root is associated with the giant molecular cloud complex, which is the main body of the optically defined Aquila Rift. The HI and molecular masses of the Rift are estimated to be M_HI˜ 1.4× 10^5M_{⊙ bullet } and M_H_2˜ 3× 10^5M_{⊙ bullet }. Gravitational energies to lift the gases to their heights are Egrav: HI ˜ 1.4 × 1051 and E_{grav: H_2}˜ 0.3× 10^{51} erg, respectively. Magnetic field is aligned along the HI arch of the Rift, and the strength is measured to be B ˜ 10 μG using Faraday rotation measures of extragalactic radio sources. The magnetic energy is estimated to be Emag ˜ 1.2 × 1051 erg. A possible mechanism of formation of the Aquila Rift is proposed in terms of interstellar magnetic inflation by a sinusoidal Parker instability of wavelength of ˜2.5 kpc and amplitude ˜500 pc.

  15. Occlusive ascending aorta and arch atheroma treated with deep hypothermic circulatory arrest and thromboendarterectomy.

    LENUS (Irish Health Repository)

    O' Sullivan, Katie E

    2013-12-01

    We describe an uncommon presentation of severely advanced aortic atherosclerosis in a 48-year old man with a history of hypertension and heavy smoking. Initial presentation with upper limb ischaemia led to the diagnosis of an aortic arch atheroma occluding 90% of the aortic lumen, managed with deep hypothermic circulatory arrest and aortic thromboendarterectomy. To our knowledge, this is the first reported case of atherosclerotic plaque resulting in aortic occlusion and requiring emergent operative intervention.

  16. Invasive aspergillosis in the aortic arch with infectious Aspergillus lesions in pulmonary bullae

    Directory of Open Access Journals (Sweden)

    Isao Watanabe

    2015-03-01

    Full Text Available A patient with pulmonary bullae died of massive hemoptysis. At autopsy a hole was observed in the aortic wall. A microscopic examination indicated small Aspergillus lesions in pulmonary bullae and extensive necrotic lesions with Aspergillus hyphae in the media of the thoracic aorta. These findings led to a diagnosis of invasive aspergillosis in the aortic arch. This is a rare case in which Aspergillus invaded the aorta in a patient without hematologic neoplasms or neutropenia.

  17. Transversal changes in dental arches from non-extraction treatment with self ligating brackets

    OpenAIRE

    Liliana Avila Maltagliati; Yasushi Inoue Myiahira; Liana Fattori; Leopoldino Capelozza Filho; Mauricio Cardoso

    2013-01-01

    OBJECTIVE: The present study aimed at analyzing, with the use of dental casts, the transverse changes of the upper and lower dental arches, after non-extraction orthodontic treatment, with self-ligating brackets. METHODS: The sample comprised 29 patients, all presenting Class I malocclusion with upper and lower crowding of at least 4 mm and treated only with a fixed appliance, without stripping, extraction or distalization. The dental casts were obtained before and after leveling with 0.019 x...

  18. Calculation of dynamic load impact on reinforced concrete arches in the ground

    Directory of Open Access Journals (Sweden)

    Barbashev Nikita Petrovich

    2016-01-01

    Full Text Available Concrete arches are widely used in the construction of underground facilities. The analysis of their work under dynamic loads (blasting, shock, seismic will improve the efficiency of design and application. The article addresses the problems of calculation of reinforced concrete arches in the ground in terms of the action of dynamic load - compression wave. The calculation is made basing on the decision of a closed system of equations that allows performing the calculation of elastic-plastic curved concrete structures under dynamic loads. Keeping in mind the properties of elastic-plastic reinforcement and concrete in the process of design variations, σ-ε diagrams are variable. The calculation is performed by the direct solution of differential equations in partial derivatives. The result is based on a system of ordinary differential equations of the second order (expressing the transverse and longitudinal oscillations of the structure and the system of algebraic equations (continuity condition of deformation. The computer program calculated three-hinged reinforced concrete arches. The structural calculations were produced by selection of the load based on the criteria of reaching the first limit state: ultimate strain of compressed concrete; ultimate strain tensile reinforcement; the ultimate deformation of the structure. The authors defined all the characteristics of the stress-strain state of the structure. The presented graphs show the change of bending moment and shear force in time for the most loaded section of the arch, the dependence of stresses and strains in concrete and reinforcement, stress changes in time for the cross-sectional height. The peculiarity of the problem is that the action of the load provokes the related dynamic forces - bending moment and longitudinal force. The calculations allowed estimating the carrying capacity of the structure using the criteria of settlement limit states. The decisive criterion was the

  19. 正畸弓丝形态的研究进展%Research prowess on the arch form in orthodontics

    Institute of Scientific and Technical Information of China (English)

    张林; 段沛沛

    2012-01-01

    在正畸临床治疗过程中,弓丝形态的设计和应用至关重要,其不仅关系到正畸治疗效果,而且对治疗周期、治疗后的稳定性等有着重要影响.不正确的弓丝形态的应用容易造成牙弓、牙槽弓、基骨弓形态的不一致,从而可能引起口颌肌系统功能不协调,容易导致复发.很多学者对怎样确定正确的正畸弓丝形态进行了大量研究,包括寻找适合大多数患者的理想弓形以及适合于个别患者的个体(牙合)弓形.本文将对标准理想牙弓形态以及个体(牙合)牙弓形态的拟合理论、应用现状以及优缺点作一综述.%The size and shape of the arch wire used in orthodontic treatment have considerable implications on the treatment effect, treatment cycle and the stability of the dentition. Using improper arch wire may cause mismatching of shape among dental arch, alveolar arch and basal arch, affecting the equilibrium of teeth between tongue and circumoral muscle forces. This always leads to relapse. Arch form relative to orthodontic therapy has been examined in various studies, including the classic and individual arch wire form. The aim of the article is to give a review on the relevant researches about the combination of the classic and individual arch wire form. The theory, practical applications and problems of these methods are described.

  20. Pattern-based approach to fetal congenital cardiovascular anomalies using the transverse aortic arch view on prenatal cardiac MRI

    Energy Technology Data Exchange (ETDEWEB)

    Dong, Su-Zhen; Zhu, Ming [Shanghai Jiaotong University School of Medicine, Department of Radiology, Shanghai Children' s Medical Center, Shanghai (China)

    2015-05-01

    Fetal echocardiography is the imaging modality of choice for prenatal diagnosis of congenital cardiovascular anomalies. However, echocardiography has limitations. Fetal cardiac magnetic resonance imaging (MRI) has the potential to complement US in detecting congenital cardiovascular anomalies. This article draws on our experience; it describes the transverse aortic arch view on fetal cardiac MRI and important clues on an abnormal transverse view at the level of the aortic arch to the diagnosis of fetal congenital cardiovascular anomalies. (orig.)

  1. The relationships between foot arch volumes and dynamic plantar pressure during midstance of walking in preschool children.

    Directory of Open Access Journals (Sweden)

    Hsun-Wen Chang

    Full Text Available OBJECTIVES: The purpose of this study was to examine the correlation between the foot arch volume measured from static positions and the plantar pressure distribution during walking. METHODS: A total of 27 children, two to six years of age, were included in this study. Measurements of static foot posture were obtained, including navicular height and foot arch volume in sitting and standing positions. Plantar pressure, force and contact areas under ten different regions of the foot were obtained during walking. RESULTS: The foot arch index was correlated (r = 0.32 with the pressure difference under the midfoot during the foot flat phase. The navicular heights and foot arch volumes in sitting and standing positions were correlated with the mean forces and pressures under the first (r = -0.296∼-0.355 and second metatarsals (r = -0.335∼-0.504 and midfoot (r = -0.331∼-0.496 during the stance phase of walking. The contact areas under the foot were correlated with the foot arch parameters, except for the area under the midfoot. CONCLUSIONS: The foot arch index measured in a static position could be a functional index to predict the dynamic foot functions when walking. The foot arch is a factor which will influence the pressure distribution under the foot. Children with a lower foot arch demonstrated higher mean pressure and force under the medial forefoot and midfoot, and lower contact areas under the foot, except for the midfoot region. Therefore, children with flatfoot may shift their body weight to a more medial foot position when walking, and could be at a higher risk of soft tissue injury in this area.

  2. Comparison of maxillary and mandibular dental arch forms by studying Fourier series developed from mathematically estimated dentitions.

    Science.gov (United States)

    Mikami, Hiroko; Nakatsuka, Michiko; Iwai, Yasutomo

    2010-11-01

    We conducted a Fourier analysis on data obtained using correlation and principal component analyses of parallel-standardized dental study models; both maxillary and mandibular dental arches were predominantly round square in shape. The present study compared and determined the contribution ratio and reproducible coefficients of amplitudes (factors affecting dental arch forms), and demonstrated that the 1st to 4th and the 1st to 6th Fourier harmonics reproduced maxillary and mandibular dental arch forms, respectively. The correlation analyses of the constant term and amplitudes demonstrated that significant differences in the 2nd harmonic amplitude was strongly correlated with the curvature of anterior teeth and the length-to-width ratio in maxillary dentitions. By comparison of the constant term and amplitudes between different arch types, we did not observe significant differences in the constant term and the 1st amplitude of maxillary dentitions and in constant term and all amplitudes of mandibular dentitions. Nevertheless, the study revealed high contribution ratios of the 1st (in mandibular dentitions) and the 2nd (in maxillary dentitions) amplitudes essentially affecting the reproducibility of arch forms. The 1st amplitudes demonstrated a bow-like arrangement of all arch types, while the 2nd amplitudes adjusted the anterior-teeth curvature and in particular demonstrated the length-to-width ratio of maxillary dentitions. The 3rd and the 4th amplitudes were also determinants of the anterior-teeth curvature of maxillary dentitions. The 6th amplitude was necessary for reproduction, but showed no difference between varying mandibular dental arch types. Collectively, we conclude that the establishment of a Fourier series significantly reproduced maxillary but not mandibular dental arch forms.

  3. Elastic energy within the human plantar aponeurosis contributes to arch shortening during the push-off phase of running.

    Science.gov (United States)

    Wager, Justin C; Challis, John H

    2016-03-21

    During locomotion, the lower limb tendons undergo stretch and recoil, functioning like springs that recycle energy with each step. Cadaveric testing has demonstrated that the arch of the foot operates in this capacity during simple loading, yet it remains unclear whether this function exists during locomotion. In this study, one of the arch׳s passive elastic tissues (the plantar aponeurosis; PA) was investigated to glean insights about it and the entire arch of the foot during running. Subject specific computer models of the foot were driven using the kinematics of eight subjects running at 3.1m/s using two initial contact patterns (rearfoot and non-rearfoot). These models were used to estimate PA strain, force, and elastic energy storage during the stance phase. To examine the release of stored energy, the foot joint moments, powers, and work created by the PA were computed. Mean elastic energy stored in the PA was 3.1±1.6J, which was comparable to in situ testing values. Changes to the initial contact pattern did not change elastic energy storage or late stance PA function, but did alter PA pre-tensioning and function during early stance. In both initial contact patterns conditions, the PA power was positive during late stance, which reveals that the release of the stored elastic energy assists with shortening of the arch during push-off. As the PA is just one of the arch׳s passive elastic tissues, the entire arch may store additional energy and impact the metabolic cost of running.

  4. A technique to stabilize record bases for Gothic arch tracings in patients with implant-retained complete dentures.

    Science.gov (United States)

    Raigrodski, A J; Sadan, A; Carruth, P L

    1998-12-01

    Clinicians have long expressed concern about the accuracy of the Gothic arch tracing for recording centric relation in edentulous patients. With the use of dental implants to assist in retaining complete dentures, the problem of inaccurate recordings, made for patients without natural teeth, can be significantly reduced. This article presents a technique that uses healing abutments to stabilize the record bases so that an accurate Gothic arch tracing can be made.

  5. An Interactive Tool for Automatic Predimensioning and Numerical Modeling of Arch Dams

    Directory of Open Access Journals (Sweden)

    D. J. Vicente

    2017-01-01

    Full Text Available The construction of double-curvature arch dams is an attractive solution from an economic viewpoint due to the reduced volume of concrete necessary for their construction as compared to conventional gravity dams. Due to their complex geometry, many criteria have arisen for their design. However, the most widespread methods are based on recommendations of traditional technical documents without taking into account the possibilities of computer-aided design. In this paper, an innovative software tool to design FEM models of double-curvature arch dams is presented. Several capabilities are allowed: simplified geometry creation (interesting for academic purposes, preliminary geometrical design, high-detailed model construction, and stochastic calculation performance (introducing uncertainty associated with material properties and other parameters. This paper specially focuses on geometrical issues describing the functionalities of the tool and the fundamentals of the design procedure with regard to the following aspects: topography, reference cylinder, excavation depth, crown cantilever thickness and curvature, horizontal arch curvature, excavation and concrete mass volume, and additional elements such as joints or spillways. Examples of application on two Spanish dams are presented and the results obtained analyzed.

  6. Statistical Analysis and Calculation Model of Flexibility Coefficient of Low- and Medium-Sized Arch Dam

    Directory of Open Access Journals (Sweden)

    Su Huaizhi

    2012-01-01

    Full Text Available The flexibility coefficient is popularly used to implement the macroevaluation of shape, safety, and economy for arch dam. However, the description of flexibility coefficient has not drawn a widely consensus all the time. Based on a large number of relative instance data, the relationship between influencing factor and flexibility coefficient is analyzed by means of partial least-squares regression. The partial least-squares regression equation of flexibility coefficient in certain height range between 30 m and 70 m is established. Regressive precision and equation stability are further investigated. The analytical model of statistical flexibility coefficient is provided. The flexibility coefficient criterion is determined preliminarily to evaluate the shape of low- and medium-sized arch dam. A case study is finally presented to illustrate the potential engineering application. According to the analysis result of partial least-squares regression, it is shown that there is strong relationship between flexibility coefficient and average thickness of dam, thickness-height ratio of crown cantilever, arc height ratio, and dam height, but the effect of rise-span ratio is little relatively. The considered factors in the proposed model are more comprehensive, and the applied scope is clearer than that of the traditional calculation methods. It is more suitable for the analogy analysis in engineering design and the safety evaluation for arch dam.

  7. 3D Laboratory Measurements of Forces, Flows, and Collimation in Arched Flux Tubes

    Science.gov (United States)

    Haw, Magnus; Bellan, Paul

    2016-10-01

    Fully 3D, vector MHD force measurements from an arched, current carrying flux tube (flux rope) are presented. The experiment consists of two arched plasma-filled flux ropes each powered by a capacitor bank. The two loops are partially overlapped, as in a Venn diagram, and collide and reconnect during their evolution. B-field data is taken on the lower plasma arch using a 54 channel B-dot probe. 3D volumetric data is acquired by placing the probe at 2700 locations and taking 5 plasma shots at each location. The resulting data set gives high resolution (2cm, 10ns) volumetric B-field data with high reproducibility (deviation of 3% between shots). Taking the curl of the measured 3D B-field gives current densities (J) in good agreement with measured capacitor bank current. The JxB forces calculated from the data have a strong axial component at the base of the current channel and are shown to scale linearly with axial gradients in current density. Assuming force balance in the flux tube minor radius direction, we infer near-Alfvenic axial flows from the footpoint regions which are consistent with the measured axial forces. Flux tube collimation is observed in conjunction with these axial flows. These dynamic processes are relevant to the stability and dynamics of coronal loops. Supported provided by NSF, AFOSR.

  8. Fatigue Performance Assessment of Composite Arch Bridge Suspenders Based on Actual Vehicle Loads

    Directory of Open Access Journals (Sweden)

    Bin Chen

    2015-01-01

    Full Text Available In the through arch bridges, the suspenders are the key components connecting the arch rib and the bridge deck in the middle, and their safety is an increasing focus in the field of bridge engineering. In this study, various vehicle traffic flow parameters are investigated based on the actual vehicle data acquired from the long-term structural health monitoring system of a composite arch bridge. The representative vehicle types and the probability density functions of several parameters are determined, including the gross vehicle weight, axle weight, time headway, and speed. A finite element model of the bridge structure is constructed to determine the influence line of the cable force for various suspenders. A simulated vehicle flow, generated using the Monte Carlo method, is applied on the influence lines of the target suspender to determine the stress process, and then the stress amplitude spectrum is obtained based on the statistical analysis of the stress process using the rainflow counting method. The fatigue performance levels of various suspenders are analyzed according to the Palmgren-Miner linear cumulative damage theory, which helps to manage the safety of the suspenders.

  9. ARCH模型的诊断分析%Diagnose analysis in ARCH models

    Institute of Scientific and Technical Information of China (English)

    柯珂; 张世英

    2001-01-01

    探讨了ARCH模型的诊断分析和变结构建模问题.所提出的分整增广GARCH-M模型包括了几乎所有现有的ARCH模型,基于分整增广GARCH-M模型克服了ARCH模型在模型设定检验,长记忆检验和参数估计等方面的障碍.利用分段建模方法来检测模型结构变化点和分段变化模型的选择.最后,以上海证券综合事业股票指数为数据,验证了诊断分析方法的有效性.%The diagnose analysis and modeling problem with structure changein ARCH models are discussed in this paper.The paper proposses fractional integrated augmented GARCH-M model which can embrace almost all the current ARCH models. Based on the fractional integrated augmented GARCH-M model, the handicap in model specification test, long memory test and parameters estimation is oversome.The segment-modeling method is used to detect the structure changing points of the ARCH model and test the models for segment-changing models.Finally, with the composite index of closing price in Shanghai stock market, it is shown to illustrate the effectiveness of the diagnose analysis.

  10. Mandibular incisor alignment and dental arch changes 1 year after extraction of deciduous canines.

    Science.gov (United States)

    Sjögren, Anders; Arnrup, Kristina; Lennartsson, Bertil; Huggare, Jan

    2012-10-01

    This study investigated the early effects on mandibular incisor irregularity and rotation together with dental arch dimensions of the extraction of four deciduous canines. Children, during early mixed dentition, were randomized into one extraction (n = 32) and one control (n = 41) group. Dental casts from baseline (T0) and 1 year follow-up (T1) were used to evaluate changes in the irregularity index and in mandibular incisor rotation, dental arch dimensions, overjet, and overbite. Median mandibular incisor irregularity decreased over time, significantly more in the extraction than the control group (1.2 versus 0.7 mm; P extraction group (42 versus 20 per cent; P extraction group versus 34 per cent in the control group (P extraction group (1.3, 1.1 mm and 2.4, 2.0 mm, respectively; P extraction of the deciduous canines, small improvements in mandibular incisor alignment were seen, together with reduced arch dimensions. Little's index underestimated malalignment related to tooth rotation.

  11. Variable-intercept panel model for deformation zoning of a super-high arch dam.

    Science.gov (United States)

    Shi, Zhongwen; Gu, Chongshi; Qin, Dong

    2016-01-01

    This study determines dam deformation similarity indexes based on an analysis of deformation zoning features and panel data clustering theory, with comprehensive consideration to the actual deformation law of super-high arch dams and the spatial-temporal features of dam deformation. Measurement methods of these indexes are studied. Based on the established deformation similarity criteria, the principle used to determine the number of dam deformation zones is constructed through entropy weight method. This study proposes the deformation zoning method for super-high arch dams and the implementation steps, analyzes the effect of special influencing factors of different dam zones on the deformation, introduces dummy variables that represent the special effect of dam deformation, and establishes a variable-intercept panel model for deformation zoning of super-high arch dams. Based on different patterns of the special effect in the variable-intercept panel model, two panel analysis models were established to monitor fixed and random effects of dam deformation. Hausman test method of model selection and model effectiveness assessment method are discussed. Finally, the effectiveness of established models is verified through a case study.

  12. Variation of the X-ray non-thermal emission in the Arches cloud

    CERN Document Server

    Clavel, Maïca; Terrier, R; Tatischeff, V; Maurin, G; Ponti, G; Goldwurm, A; Decourchelle, A

    2014-01-01

    The origin of the iron fluorescent line at 6.4 keV from an extended region surrounding the Arches cluster is debated and the non-variability of this emission up to 2009 has favored the low-energy cosmic-ray origin over a possible irradiation by hard X-rays. By probing the variability of the Arches cloud non-thermal emission in the most recent years, including a deep observation in 2012, we intend to discriminate between the two competing scenarios. We perform a spectral fit of XMM-Newton observations collected from 2000 to 2013 in order to build the Arches cloud lightcurve corresponding to both the neutral Fe Kalpha line and the X-ray continuum emissions. We reveal a 30% flux drop in 2012, detected with more than 4 sigma significance for both components. This implies that a large fraction of the studied non-thermal emission is due to the reflection of an X-ray transient source.

  13. 3D MODELLING OF PROPHYLACTIC FOOTWEAR FOR A HIGH ARCHED FOOT

    Directory of Open Access Journals (Sweden)

    COSTEA Mariana

    2016-05-01

    Full Text Available This article approaches the methodology of designing customized footwear for high arched foot. The authors propose to reconsider the classical structure of footwear bottom components for people with high arched foot and recommend incorporating custom components, with the role of compensation or adjustment. This study continues the authors’ research, starting from a foot’s 3D shape obtained by 3D scanning, the anthropometrical and biomechanical parameters, shoe lasts’ 3D modelling and continuing with 3D footwear design. Including customized orthosis can help to stop the evolution of abnormalities, diminishes sensations of pain during walking and improves performance in various physical activities carried out during the day, walking, running, and standing. The prophylactic footwear has to meet four main requirements: to protect the foot and ankle during walking and static; to ensure the normal resistance systems (bones, muscle and joint of the foot; to prevent the installation of irreversible structural changes by reducing stress on the foot; to contribute to increased performance in conducting regular physical activity. It is presented the steps of modelling an orthosis, a virtual simulation of its cutting process, followed by the integration and development of the insole, filling and sole for a customized shoe. Delcam Crispin CAD system and its applications for orthopaedics are used to design the bottom components of prophylactic footwear for a high arched foot.

  14. Evaluation of Dynamic Load Factors for a High-Speed Railway Truss Arch Bridge

    Directory of Open Access Journals (Sweden)

    Ding Youliang

    2016-01-01

    Full Text Available Studies on dynamic impact of high-speed trains on long-span bridges are important for the design and evaluation of high-speed railway bridges. The use of the dynamic load factor (DLF to account for the impact effect has been widely accepted in bridge engineering. Although the field monitoring studies are the most dependable way to study the actual DLF of the bridge, according to previous studies there are few field monitoring data on high-speed railway truss arch bridges. This paper presents an evaluation of DLF based on field monitoring and finite element simulation of Nanjing DaShengGuan Bridge, which is a high-speed railway truss arch bridge with the longest span throughout the world. The DLFs in different members of steel truss arch are measured using monitoring data and simulated using finite element model, respectively. The effects of lane position, number of train carriages, and speed of trains on DLF are further investigated. By using the accumulative probability function of the Generalized Extreme Value Distribution, the probability distribution model of DLF is proposed, based on which the standard value of DLF within 50-year return period is evaluated and compared with different bridge design codes.

  15. Research on analysis method for temperature control information of high arch dam construction

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Temperature control,which is directly responsible for the project quality and progress,plays an important role in high arch dam construction.How to discover the rules from a large amount of temperature control information collected in order to guide the adjustment of temperature control measures to prevent cracks on site is the key scientific problem.In this paper,a mathematic logical model was built firstly by means of a coupling analysis of temperature control system decomposition and coordination for high arch dam.Then,an analysis method for temperature control information was presented based on data mining technology.Furthermore,the data warehouse of temperature control was designed,and the artificial neural network forecasting model for the highest temperature of concrete was also developed.Finally,these methods were applied to a practical project. The result showed that the efficiency and precision of temperature control was improved,and rationality and scientificity of management and decision-making were strengthened.All of these researches provided an advanced analysis method for temperature control in the high arch dam construction process.

  16. Modeling and forecasting crude oil markets using ARCH-type models

    Energy Technology Data Exchange (ETDEWEB)

    Cheong, Chin Wen [Research Centre of Mathematical Sciences, Faculty of Information Technology, Multimedia University, 63100 Cyberjaya, Selangor (Malaysia)

    2009-06-15

    This study investigates the time-varying volatility of two major crude oil markets, the West Texas Intermediate (WTI) and Europe Brent. A flexible autoregressive conditional heteroskedasticity (ARCH) model is used to take into account the stylized volatility facts such as clustering volatility, asymmetric news impact and long memory volatility among others. The empirical results indicate that the intensity of long-persistence volatility in the WTI is greater than in the Brent. It is also found that for the WTI, the appreciation and depreciation shocks of the WTI have similar impact on the resulting volatility. However, a leverage effect is found in Brent. Although both the estimation and diagnostic evaluations are in favor of an asymmetric long memory ARCH model, only the WTI models provide superior in the out-of-sample forecasts. On the other hand, from the empirical out-of-sample forecasts, it appears that the simplest parsimonious generalized ARCH provides the best forecasted evaluations for the Brent crude oil data. (author)

  17. Tunable Clamped–Guided Arch Resonators Using Electrostatically Induced Axial Loads

    KAUST Repository

    Alcheikh, Nouha

    2017-01-04

    We present a simulation and experimental investigation of bi-directional tunable in-plane clamped-guided arch microbeam resonators. Tensile and compressive axial forces are generated from a bi-directional electrostatic actuator, which modulates the microbeam stiffness, and hence changes its natural frequency to lower or higher values from its as-fabricated value. Several devices of various anchor designs and geometries are fabricated. We found that for the fabricated shallow arches, the effect of the curvature of the arch is less important compared to the induced axial stress from the axial load. We have shown that the first mode resonance frequency can be increased up to twice its initial value. Additionally, the third mode resonance frequency can be increased up to 30% of its initial value. These results can be promising as a proof-of-concept for the realization of wide-range tunable microresonators. The experimental results have been compared to finite-element simulations, showing good agreement among them.

  18. A solar radio moving type Ⅳ burst of expanding arches type involving multi-sources

    Institute of Scientific and Technical Information of China (English)

    XIE; Ruixiang(谢瑞祥); WANG; Min(汪敏); DUAN; Changchun(段长春); YAN; Yihua(颜毅华); R.; A.; Sych; A.; T.; Altyntsev

    2002-01-01

    A complex solar radio moving type IV burst was observed on 23 September 1998 with the broadband (1.0-2.0 GHz and 2.6-3.8 GHz) spectrometers with high temporal and spectral resolutions at National Astronomical Observatories of China (NAOC). Comparing to the high spatial resolution data of Siberian Solar Radio Telescope (SSRT), we find that this burst is a rare type of moving type IV burst which is caused by the expanding arches, and the spatial structure oscillations of the radio sources are related with the time structure pulsations of the radio emission. Furthermore, the burst is associated with the multiple quasi-periodic long-term pulsations, and this suggests the existence of multi-scale magnetic structures in a large expanding coronal arch. We think the moving type IV burst is due to the synchrotron emission of the energetic electrons trapped in the expanding arch, and the multiple quasi-periodic pulsations are due to the second harmonic plasma emission.

  19. Apport du rayonnement synchrotron à l'étude de cheveux archéologiques

    Science.gov (United States)

    Bertrand, L.; Chevallier, P.; Doucet, J.; Simionovici, A.; Tsoucaris, G.; Walter, P.

    2002-07-01

    La préservation dans certains contextes archéologiques des cheveux humains et des fibres animales est favorisée par leur transformation chimique au contact d'objets métalliques. Afin de mieux comprendre les phénomènes complexes mis en jeu, nous avons étudié expérimentalement la fixation de cations métalliques (Cu et Pb) dans des cheveux modèles à partir de différentes méthodes de caractérisation utilisant le rayonnement X synchrotron. Nous avons ainsi pu mettre en évidence la fixation spécifique d'une partie de ces cations au sein des lipides structurés du cheveu. La comparaison entre échantillons modèles et archéologiques apporte de nouvelles données concernant les premières étapes d'altération des cheveux archéologiques.

  20. Patients' Expectation Before and Satisfaction After Full-Arch Fixed Implant-Prosthesis Rehabilitation.

    Science.gov (United States)

    da Cunha, Miriã Corália; Santos, Jarbas Francisco Fernandes Dos; Santos, Mateus Bertolini Fernandes Dos; Marchini, Leonardo

    2015-06-01

    This study evaluated patients' expectation before and satisfaction after full-arch fixed implant-prosthesis rehabilitation. Other variables that could influence patient satisfaction with this therapy were also evaluated. Using a visual analog scale (VAS), a sample of 28 patients assigned scores for their expectation before and satisfaction after therapy regarding chewing, esthetics, comfort, and phonetics. They also completed a questionnaire concerning their evaluation of the dentists' conduct. The average VAS scores were high for both expectation prior to treatment and satisfaction after treatment, and there was no statistical difference between them. Women presented higher expectations than men regarding esthetics (P = 0.040), phonetics (P = 0.043) and comfort (P = 0.013). Significant differences were not found between VAS scores with clinical variables (arch, radiographic bone quality, surgical bone quality, and implant inclination), educational level, and patients' evaluation of the dentists' conduct. Considering the results obtained in this study, expectation before implant-supported, full-arch fixed prosthesis therapy were met following treatment, with women having higher expectations than men.

  1. Guyon's tunnel syndrome during pregnancy with concomitant anomalous arch of the ulnar nerve: a case report.

    Science.gov (United States)

    Janmohammadi, Nasser

    2014-01-01

    Numerous causes are reported for ulnar nerve compression at the wrist, known as Guyon's tunnel syndrome. In the present article, a patient with Guyon's tunnel syndrome during pregnancy concomitant with an anomaly of ulnar nerve is described. A 29-year-old Iranian woman presented with clinical features of Guyon's tunnel syndrome (pain and paresthesia in the fifth finger of the left hand and atrophy of the first dorsal interosseus muscle). Symptoms of the patient appeared during the third trimester of pregnancy. Electro diagnostic studies confirmed Guyon's tunnel syndrome. Surgical exploration revealed an anomalous arch of the ulnar nerve passing through the flexor carpi ulnaris (FCU) tendon. The anomalous arch of the ulnar nerve was released by resection of the segment of FCU tendon passing through the ulnar nerve arch. Therefore, in patients with Guyon's tunnel syndrome, the ulnar nerve anomaly should be kept in mind as a cause. Moreover, pregnancy may have a provocative effect on Guyon's tunnel syndrome similar to carpal tunnel syndrome (CTS).

  2. Guyon's tunnel syndrome during pregnancy with concomitant anomalous arch of the ulnar nerve: a case report.

    Directory of Open Access Journals (Sweden)

    Nasser Janmohammadi

    2014-07-01

    Full Text Available Numerous causes are reported for ulnar nerve compression at the wrist, known as Guyon's tunnel syndrome. In the present article, a patient with Guyon's tunnel syndrome during pregnancy concomitant with an anomaly of ulnar nerve is described. A 29-year-old Iranian woman presented with clinical features of Guyon's tunnel syndrome (pain and paresthesia in the fifth finger of the left hand and atrophy of the first dorsal interosseus muscle. Symptoms of the patient appeared during the third trimester of pregnancy. Electro diagnostic studies confirmed Guyon's tunnel syndrome. Surgical exploration revealed an anomalous arch of the ulnar nerve passing through the flexor carpi ulnaris (FCU tendon. The anomalous arch of the ulnar nerve was released by resection of the segment of FCU tendon passing through the ulnar nerve arch. Therefore, in patients with Guyon's tunnel syndrome, the ulnar nerve anomaly should be kept in mind as a cause. Moreover, pregnancy may have a provocative effect on Guyon's tunnel syndrome similar to carpal tunnel syndrome (CTS.

  3. The orbital motion of the Arches cluster - clues on cluster formation near the galactic center

    Energy Technology Data Exchange (ETDEWEB)

    Stolte, Andrea; Ghez, Andrea M; Morris, Mark R; Lu, Jessica R [UCLA, 430 Portola Plaza, Los Angeles, CA 90095-1547 (United States); Brandner, Wolfgang [MPIA, Koenigstuhl 17, 69117 Heidelberg (Germany); Matthews, Keith [Caltech Optical Observatories, California Institute of Technology, MS 320-47, Pasadena, CA 91225 (United States)], E-mail: astolte@astro.ucla.edu, E-mail: kym@caltech.edu

    2008-10-15

    The Arches cluster is one of the most massive, young clusters in the Milky Way. Located inside the central molecular zone in the inner 200 pc of the Galactic center, it formed in one of the most extreme star-forming environments in the present-day Galaxy. Its young age of only 2.5 Myr allows us to observe the cluster despite the strong tidal shear forces in the inner Galaxy. The orbit of the cluster determines its dynamical evolution, tidal stripping, and hence its fate. We have measured the proper motion of the Arches cluster relative to the ambient field from Keck/NIRC2 LGS-AO and VLT/NAOS-CONICA NGS-AO observations taken 4.3 years earlier. When combined with the radial velocity, we derive a 3D space motion of 232 {+-} 30 km/s for the Arches. This motion is exceptionally large when compared to molecular cloud orbits in the GC, and places stringent constraints on the formation scenarios for starburst clusters in dense, nuclear environments.

  4. Study on multi-scheme analysis and evaluation method for concrete sequence placement of high arch dam

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    A complete scheme for solving the key scientific problems of how to make concrete sequence placement scheme of high arch dam reasonable and feasible and how to meet the need of construction process was presented.First,based on a coupling analysis of concrete sequence placement system of high arch dam,a mathematical model considering complex construction constraints was established.Second,a multi-scheme computational analysis method for concrete sequence placement of high arch dam was proposed based on dynamic simulation.Third,a multi-scheme evaluation method for concrete sequence placement was put forward based on analytic hierarchy process.Fourth,feedback guidance for progress control and management in the high arch dam construction process was proposed.Finally,these methods were applied to a practical project to show that the methods can analyze and evaluate multi-scheme for concrete sequence placement of high arch dam effectively,optimize the process of dam concrete sequence placement,and recommend engineering measures.These methods provide new theoretical principles and technical measures for real-time progress control in the high arch dam construction.

  5. Unilateral axillary arch with two slips entrapping neurovascular bundle in axilla and its innervation by the median nerve

    Directory of Open Access Journals (Sweden)

    Somayaji SN

    2009-10-01

    Full Text Available Axillary arch is an additional muscle bundle of various dimensions extending usually from the latissimus dorsi in the posterior fold of the axilla, to the pectoralis major or other neighboring muscles and bones. In the present case presence of such unusual axillary arch innervated by the median nerve has been reported. During routine dissection of axilla region in one of the upper limbs, the occurrence of axillary arch was observed. The muscle fibers were arising from the belly of latissimus dorsi and were getting inserted to the tendon of coracobrachilais and lateral lip of bicipital groove. As it passed through the axilla it divided into 2 slips, enclosing the axillary vessels and nerves related to them. The fleshy fibers of the axillary arch were innervated by 2 small twigs from the median nerve. Though the occurrence of the axillary arch is very common, axillary arch with 2 slips getting innervated by the median nerve is not been reported so far. Further, a detailed literature review was done and the surgical and clinical importance of the case was discussed.

  6. The association between dental arch dimensions and occurrence of Finnish dental consonant misarticulations in cleft lip/palate children.

    Science.gov (United States)

    Laitinen, J; Ranta, R; Pulkkinen, J; Haapanen, M L

    1998-10-01

    The aim of this study was to examine whether maxillary and mandibular dental arch width, length, and palatal height dimensions are associated with the occurrence of misarticulations (phonetic or phonologic errors) in the dental consonants /r/, /s/, and /1/ in different cleft types and sexes. The subjects were 263 (109 girls, 154 boys) 6-year-old Finnish-speaking non-syndromic children with isolated cleft palate (CP, n=79), deft lip/alveolus (CL(A), n=77), unilateral (UCLP, n=80), and bilateral (BCLP, n=27) cleft lip and palate. Dental plaster casts were measured by two authors using the technique of Moorrees, and auditive speech was analyzed with high reliability by two speech pathologists. The results showed that the occurrence of misarticulations increased and dental arch dimensions decreased with the severity of the cleft. Narrower and shorter maxillary arches as well as shallower palates were related to problems with the studied dental consonants. Mandibular arch dimensions were not related to the misarticulations. However, statistical analysis did not reveal significant differences in dental arch dimensions between subjects with and without misarticulations when they were compared separately for different cleft types. The etiology of clefting per se--isolated deft palate versus cleft lip with or without deft palate--did not seem to explain the associations between dental arch dimensions and the studied misarticulations.

  7. Finding the lost arches of the Medieval Avignon's Bridge (Avignon, Provence, South France): a geoarchaeological approach

    Science.gov (United States)

    Ghilardi, M.; Vella, M. A.; Hermitte, D.; Parisot, J. C.; Dussouillez, P.; Fleury, T. J.; Provansal, M.; Delanghe-Sabatier, D.; Demory, F.; Mathé, P. E.; Quesnel, Y.; Danos, S.; Balossino, S.; Delpey, Y.; Hartmann-Virnich, A.; Berthelot, M.

    2012-04-01

    This papers aims to precisely locate the medieval arches of the so called Avignon's (Saint Bénézet) Bridge (South France) and to reconstruct the fluvial dynamics of the Rhone River from Early Medieval Times to the 19th century. Until now, just four remnant arches are still visible (near Avignon) and it is estimated that 22 arches (which represents a total length of approximately 920 meters) were built to span over one of the largest French Rivers. The late roman and early mediaeval dates of several foundation poles extracted from the river bed might suggest the existence of an earlier bridge, though it remains uncertain if any of such an earlier structure was still visible when the first mediaeval bridge was built. The mediaeval bridge was erected from 1177 until 1185 (in less than 10 years), but modified a few decades later when stone arches were erected, thus raising the road level substantially. The structure of the bridge being vulnerable, seasonal floods proved a neverending threat and cause of damage which was frequently repaired with masonry or wood. Final abandon of the edifice could be placed in the late 1660s - Early 1670s according to historical sources. Questions arose about the location of the "lost arches" and evident flood events dated back to the Little Ice Age (e.g. 1500 to 1850) could be responsible of the partial destruction of the bridge. Few archaeological, architectural, historical and palaeoenvironmental works have been undertaken in order to determine the precise shape of the Saint Bénézet Bridge at certain stages of its history. Since 2010, a joint team composed by laboratories affiliated to the French Public Research Centre (CNRS) and to Universities of Avignon and of Aix-Marseille 1 is trying to link the different phases of constructions/destructions of the monument with the fluvial dynamics of the Rhone River for the concerned period (ANR PAVAGE). The geoarchaeological approach adopted comprises bathymetric surveys (SONAR and

  8. Enfermedad de Jacob asociada con el síndrome de disfunción de la articulación temporomandibular: presentación de un caso

    OpenAIRE

    Capote, Ana; Rodríguez, Francisco J.; Blasco, Ana; Muñoz, Mario F.

    2005-01-01

    La enfermedad de Jacob se describe como una entidad infrecuente en la cual se establece una formación articular sinovial entre una apófisis coronoide mandibular elongada y el hueso malar homolateral. El Síndrome de disfunción de la articulación temporomandibular (ATM) ha sido postulado como posible factor etiológico del alargamiento este proceso coronoideo. Presentamos el caso de una mujer de 23 años con un desplazamiento discal de ATM de larga evolución y limitación de l...

  9. Jacob Kornbeck Alternatives to convergence?

    DEFF Research Database (Denmark)

    Jensen, Niels Rosendal

    2017-01-01

    Anmeldelsen omfatter Kornbecks PhD-afhandling og fremhæver hhv. diskuterer, hvorvidt der finder konvergens sted mellem socialpædagoger og socialarbejdere. Dette er tilfældet i Tyskland, men derimod ikke for de to lande, Danmark og Belgien, som der sammenlignes med. Endvidere er det slet ikke tilf...

  10. Jacob's Ladder and Scientific Ontologies

    CERN Document Server

    Stern, Julio Michael

    2013-01-01

    The main goal of this article is to use the epistemological framework of a specific version of Cognitive Constructivism to address Piaget's central problem of knowledge construction, namely, the re-equilibration of cognitive structures. The distinctive objective character of this constructivist framework is based on Heinz von Foerster's fundamental metaphor of - objects as tokens for eigen-solutions, and is also supported by formal inference methods of Bayesian statistics. This epistemological perspective is illustrated using some episodes in the history of chemistry concerning the definition or identification of chemical elements. Some of von Foerster's epistemological imperatives provide general guidelines of development and argumentation. Keywords: Chemical elements; Cognitive constructivism; Development of cognitive structures; Eigen-solutions; External symbol grounding; Objective knowledge; Ontology alignments; Scientific ontologies.

  11. Longitudinal force in continuously welded rail on long-span tied arch continuous bridge carrying multiple tracks

    Institute of Scientific and Technical Information of China (English)

    YAN Bin; DAI Gong-lian; GUO Wen-hua; XU Qing-yuan

    2015-01-01

    Considering arch rib, lateral brace, suspender, girder, pier and track position, the model for the interaction between long-span tied arch continuous bridge and multiple tracks was established by using steel-concrete composite section beam element to simulate concrete-filled steel tube (CFST) arch rib, using the beam element with rigid arm to simulate the prestressed concrete girder and using nonlinear bar element to simulate longitudinal constraint between track and bridge. Taking a (77+3×156.8+77) m tied arch continuous bridge with four tracks on the Harbin-Qiqihar Passenger Dedicated Line as an example, the arrangement of continuously welded rail (CWR) was explored. The longitudinal force in CWR on the tied arch continuous bridge, the pier top horizontal force and torque due to the unbalance load case, were analyzed under the action of temperature, vertical live load, train braking and wind load. Studies show that, it can significantly reduce track displacement to set the track expansion devices at main span arch springing on both sides; the track stress due to arch temperature variation can reach 40.8 MPa; the track stress, pier top horizontal force and torque are related to the number of loaded tracks and train running direction, and the bending force applied to unloaded track is close to the loaded track, while the braking force applied to unloaded track is 1/4 to 1/2 of the loaded track; the longitudinal force of track due to the wind load is up to 12.4 MPa, which should be considered.

  12. Mikromorphologische und archäopedologische Untersuchungen von Böden und Sedimenten der bronzezeitlichen Siedlung Tell Chuera, Nord-Syrien

    OpenAIRE

    Fritzsch, Dagmar

    2011-01-01

    Im Vordergrund dieser Dissertation steht die Methode der Mikromorphologie, die verknüpft mit weiteren bodenkundlichen Analysen sowohl bodenkundliche Fragen, als auch siedlungsfunktionale Fragen beantworten kann. Die Methode dient also ideal der Verknüpfung von Bodenkunde und Archäologie. Der Begriff Archäopedologie beschreibt genau diese Verknüpfung – die Anwendung bodenkundlicher Methoden zur Bearbeitung archäologischer Fragestellungen. Inhalt des ersten Themenschwerpunktes dieser Arbeit ist...

  13. Use of Percutaneous Access via Combination of Transconjunctival and Lateral Canthotomy Approach for Rigid Fixation and Reconstruction of the Unstable Zygomatic Arch

    Directory of Open Access Journals (Sweden)

    Kermani

    2016-10-01

    Full Text Available Introduction Zygomatic arch fractures are common injuries in the maxillofacial injuries. Sometimes it is necessary to fix the unstable fragments of the zygomatic arch. Case Presentation We introduce a combination of transconjunctival and lateral canthotomy for open reduction and percutaneous access for rigid fixation of the arch in the zygomatic maxillary complex (ZMC fracture in a 44-year-old man. Conclusions This approach may be an appropriate approach to the zygomatic arch in the ZMC fractures and eliminates the use of the coronal flap.

  14. Estimating the Volatility of Cocoa Price Return with ARCH and GARCH Models

    Directory of Open Access Journals (Sweden)

    Lya Aklimawati

    2013-08-01

    Full Text Available Dynamics of market changing as a result of market liberalization have an impact on agricultural commodities price fluctuation. High volatility on cocoa price movement reflect its price and market risk. Because of price and market uncertainty, the market players face some difficulties to make a decision in determining business development. This research was conducted to 1 understand the characteristics of cocoa price movement in cocoa futures trading, and 2analyze cocoa price volatility using ARCH and GARCH type model. Research was carried out by direct observation on the pattern of cocoa price movement in the futures trading and volatility analysis based on secondary data. The data was derived from Intercontinental Exchange ( ICE Futures U.S. Reports. The analysis result showed that GARCH is the best model to predict the value of average cocoa price return volatility, because it meets criteria of three diagnostic checking, which are ARCH-LM test, residual autocorrelation test and residual normality test. Based on the ARCH-LM test, GARCH (1,1did not have heteroscedasticity, because p-value  2 (0.640139and F-statistic (0.640449 were greater than 0.05. Results of residual autocorrelation test indicated that residual value of GARCH (1,1 was random, because the statistic value of Ljung-Box (LBon the 36 th lag is smaller than the statistic value of  2. Whereas, residual normality test concluded the residual of GARCH (1,1 were normally distributed, because AR (29, MA (29, RESID (-1^2, and GARCH (-1 were significant at 5% significance level. Increasing volatility value indicate high potential risk. Price risk can be reduced by managing financial instrument in futures trading such as forward and futures contract, and hedging. The research result also give an insight to the market player for decision making and determining time of hedging. Key words: Volatility, price, cocoa, GARCH, risk, futures trading

  15. Effectiveness of a lower lingual arch as a space holding device.

    Science.gov (United States)

    Owais, A I; Rousan, M E; Badran, S A; Abu Alhaija, E S

    2011-02-01

    The aims of this study were to evaluate the effectiveness of a lower lingual holding arch (LLHA) in maintaining arch length, and to compare the effectiveness of two LLHAs made of two different gauges (0.9 and 1.25 mm) of stainless steel (SS) wire. The sample comprised 44 subjects (24 males and 20 females) who for various reasons attended orthodontic clinics at Jordan University of Science and Technology Dental Teaching Center. The subjects were randomly divided into two treatment groups. The first group contained 20 subjects (12 males/8 females, average age 10.76 ± 0.75 years). The LLHA used in this group was made of 0.9 mm SS wire. The second group comprised 24 subjects (12 males/12 females, average age 10.57 ± 0.54 years). The LLHA used in this group was made of 1.25 mm SS wire. The third group consisted of 23 subjects (15 males/8 females, average age 10.63 ± 0.66 years) who served as the control. The records consisted of lateral cephalograms, dental pantomograms, and study casts. Paired t-test, analysis of variance, and chi-square tests were used to determine whether significant differences existed between the groups. In both treatment groups, the lower incisors proclined and moved forward, and space loss of the lower primary second molar occurred. The LLHA made of 0.9 mm SS was superior to that made of 1.25 mm SS in terms of arch length preservation.

  16. Serial extraction protocol for partial arches in implant dentistry: principles and clinical methodology.

    Science.gov (United States)

    Cavallaro, John S; Greenstein, Gary; Greenstein, Ben

    2010-01-01

    Serial extraction protocol (SEP) is a clinical technique that facilitates using natural tooth abutments to support a fixed interim resin prosthesis, while inserting a sufficient number of implants to retain a definitive fixed prosthesis. A Class 1 protocol allows all necessary implants to be placed during one surgical appointment, while a Class 2 protocol requires two or more rounds of implant installation to achieve sufficient support for a definitive fixed prosthesis. The SEP methodology can be used to restore full and partially edentulous dentitions. This article addresses rehabilitation of partial arches using an SEP protocol.

  17. A rare association of interrupted aortic arch type C and microdeletion 22q11.2.

    Science.gov (United States)

    Cuturilo, Goran; Drakulic, Danijela; Stevanovic, Milena; Jovanovic, Ida; Djukic, Milan; Miletic-Grkovic, Slobodanka; Atanaskovic-Markovic, Marina

    2008-10-01

    Microdeletion 22q11.2 is associated with a variety of findings, and the most common are cardiac defects. It is very frequently associated with interrupted aortic arch (IAA) type B and very rarely with type A and type C. Here we report the first case of IAA type C associated with 22q11.2 deletion in Serbia and, to the best of our knowledge, the fourth case described worldwide so far. By this report we would like to point out that all patients with IAA type C who have additional features specific for 22q11.2 microdeletion syndrome should be screened for the presence of this deletion.

  18. Tail dependence of random variables from ARCH and heavy tailed bilinear models

    Institute of Scientific and Technical Information of China (English)

    潘家柱

    2002-01-01

    Discussed in this paper is the dependent structure in the tails of distributions of random variables from some heavy-tailed stationary nonlinear time series. One class of models discussed is the first-order autoregressive conditional heteroscedastic (ARCH) process introduced by Engle (1982). The other class is the simple first-order bilinear models driven by heavy-tailed innovations. We give some explicit formulas for the asymptotic values of conditional probabilities used for measuring the tail dependence between two random variables from these models. Our results have significant meanings in finance.

  19. Energy dissipation of Alfven wave packets deformed by irregular magnetic fields in solar-coronal arches

    Science.gov (United States)

    Similon, Philippe L.; Sudan, R. N.

    1989-01-01

    The importance of field line geometry for shear Alfven wave dissipation in coronal arches is demonstrated. An eikonal formulation makes it possible to account for the complicated magnetic geometry typical in coronal loops. An interpretation of Alfven wave resonance is given in terms of gradient steepening, and dissipation efficiencies are studied for two configurations: the well-known slab model with a straight magnetic field, and a new model with stochastic field lines. It is shown that a large fraction of the Alfven wave energy flux can be effectively dissipated in the corona.

  20. Seismic response of arch dams considering infinite radiation damping and joint opening effects

    Institute of Scientific and Technical Information of China (English)

    刘新佳; 徐艳杰; 王光纶; 张楚汉

    2002-01-01

    Effects of two important factors on earthquake response of high arch dams are considered and combined into oneprogram. These factors are: effects of radiation damping of the infinite canyon and local non-linearity of the contraction jointopening between the dam monoliths. For modeling of rock canyon, the discrete parameters are obtained based on a curve fitting,thus allowing the nonlinear dam system to be solved in the time domain. The earthquake uniform free-field input at thedam-canyon interface is used. An engineering example is given to demonstrate the significant effects of the radiation dampingon the structure response.