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Sample records for hugh van horn

  1. Hugh Maaskant : architect van de vooruitgang

    NARCIS (Netherlands)

    Provoost, M.

    2003-01-01

    Hugh Maaskant (1907–1977) is best known as the architect who made the biggest mark on the post-war reconstruction of Rotterdam with such buildings as the Groothandelsgebouw, the Hilton Hotel and the Lijnbaan flats. Beginning his career in 1937 as the partner of Willem van Tijen, Maaskant embarked on

  2. Hugh Maaskant : architect van de vooruitgang

    NARCIS (Netherlands)

    Provoost, Michelle

    2003-01-01

    Hugh Maaskant (1907–1977) is best known as the architect who made the biggest mark on the post-war reconstruction of Rotterdam with such buildings as the Groothandelsgebouw, the Hilton Hotel and the Lijnbaan flats. Beginning his career in 1937 as the partner of Willem van Tijen, Maaskant embarked on

  3. Hugh Maaskant: architect van de vooruitgang

    OpenAIRE

    Provoost, M.

    2003-01-01

    Hugh Maaskant (1907–1977) is best known as the architect who made the biggest mark on the post-war reconstruction of Rotterdam with such buildings as the Groothandelsgebouw, the Hilton Hotel and the Lijnbaan flats. Beginning his career in 1937 as the partner of Willem van Tijen, Maaskant embarked on his most prolific period after establishing an independent practice in 1955. He produced the lion’s share of his work in the 1950s and ’60s, the very period architectural critics generally regard ...

  4. Hughes, Twain, Child, and Sanger: Four Who Locked Horns with the Censors

    Science.gov (United States)

    Meltzer, Milton

    1969-01-01

    A look at the lives and conflicts of four writers--Langston Hughes, Mark Twain, Lydia Maria Child, and Margaret Sanger--who faced public criticism and censorship because oftheir views on controversial issues. (RM)

  5. magnetic horn

    CERN Multimedia

    Neutrinos and antineutrinos are ideal for probing the weak force because it is effectively the only force they feel. How were they made? Protons fired into a metal target produce a tangle of secondary particles. A magnetic horn like this one, invented by Simon Van der Meer, selected pions and focused them into a sharp beam. Pions decay into muons and neutrinos or antineutrinos. The muons were stopped in a wall of 3000 tons of iron and 1000 tons of concrete, leaving the neutrinos or antineutrinos to reach the Gargamelle bubble chamber. A simple change of magnetic field direction on the horn flipped between focusing positively- or negatively-charged pion beams, and so between neutrinos and antineutrinos.

  6. Necrology: Hugh Carson Cutler

    Directory of Open Access Journals (Sweden)

    David L. Browman

    1999-05-01

    Full Text Available Hugh Carson Cutler, forner curator of Economic Botany at the Missouri Botanical Gardens, was one of the first generation paleoethnobotanists in this country. A pioneer in the field, and instrumental in getting American archaeologists to begin to employ flotation techniques for recovery of botanical remains. Cutler, the son of Manuel and Mary Cutler. was born September 8. 1912 in Milwaukee. Wisconsin. and died September 22, 1998 in Topeka, Kansas.

  7. Kroniek van het belastingrecht 2003-2004

    NARCIS (Netherlands)

    Essers, P.H.J.; Happé, R.H.

    2004-01-01

    Rechtspraak van het Hof van Justitie heeft dit jaar grote impact gehad. De Bosal-zaak heeft de Nederlandse schatkist geconfronteerd met een miljardenclaim. Evenze heeft de zaak Hughes de Lasteyrie du Saillant het gehele systeem van exitheffingen op losse schroeven gezet. Ook de aankondiging van de V

  8. Resultaat van pleegzorgplaatsingen : een onderzoek naar breakdown en de ontwikkeling van adolescente pleegkinderen bij langdurige pleegzorgplaatsingen

    NARCIS (Netherlands)

    Oijen, Simon van

    2010-01-01

    Het doel van een pleegzorgplaatsing is doorgaans gericht op het zo snel mogelijk herstellen van de oorspronkelijke opvoedingssituatie of het op korte termijn verkrijgen van duidelijkheid omtrent de haalbaarheid hiervan (Hermanns & Horn, 2000). Indien mogelijk heeft de pleegzorgplaatsing een afgebake

  9. Neutrino horn

    CERN Multimedia

    1967-01-01

    View of the new neutrino horn installed in its blockhouse from the target end. Protons pass through the 2mm hole in the centre of the small fluorescent screen, hitting the target immediately behind it. The circular tubes carry pressurized cooling water.

  10. The Many Worlds of Hugh Everett III

    CERN Document Server

    ,

    2011-01-01

    A review of Peter Byrne's biography of Hugh Everett III, "The Many Worlds of Hugh Everett III: Multiple Universes, Mutual Assured Destruction, and the Meltdown of a Nuclear Family", (Oxford University Press, 2010).

  11. Focusing horn

    CERN Multimedia

    Was used for the AA (antiproton accumulator). Making an antiproton beam took a lot of time and effort. Firstly, protons were accelerated to an energy of 26 GeV in the PS and ejected onto a metal target. From the spray of emerging particles, a magnetic horn picked out 3.6 GeV antiprotons for injection into the AA through a wide-aperture focusing quadrupole magnet.For a million protons hitting the target, just one antiproton was captured, 'cooled' and accumulated. It took 3 days to make a beam of 3 x 10^11 -, three hundred thousand million - antiprotons.

  12. A guide to Hughes' syndrome.

    Science.gov (United States)

    Sheehan, Tina Louise

    Hughes' syndrome, or antiphospholipid syndrome, is thought to be the cause of one in four strokes in people aged less than 40 years. It is an antiinflammatory autoimmune disorder in which the blood has a tendency to clot too quickly. It can affect any artery or vein in the body and the main symptoms are thrombosis, pregnancy loss and the presence of antibodies. If detected it can be treated effectively.

  13. Evaluation and combined geophysical interpretations of NURE and related geoscience data in the Van Horn, Pecos, Marfa, Fort Stockton, Presidido, and Emory Peak quadrangles, Texas. Volume 1. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Keller, G.R.; Hinze, W.J.; Aiken, C.L.V.; Goodell, P.C.; Roy, R.F.; Pingitore, N.E.

    1981-09-01

    This report (two volumes) is the culmination of a two-year study of the six Trans-Pecos Texas quadrangles (Van Horn, Pecos, Marfa, Fort Stockton, Presidio, and Emory Park) surveyed as part of the National Uranium Resource Evaluation (NURE) program. Volume I contains a discussion of the aeromagnetic, gravity and geochemical data, their processing, and their analysis. The geologic history and setting of the Trans-Pecos are discussed along with the uranium potential of the region. Uranium anomalies and occurrences characteristic of numerous different NURE classes are present in the study area, and information is presented on 33 drill holes into these targets. Volume II is a folio of maps reduced to a scale of 1:500,000. Geologic maps for each of the six quadrangles are included and the geophysical maps have been prepared to be overlays for the goelogic maps. In addition to the geologic maps, residual aeromagnetic anomaly, complete Bouguer gravity anomaly, flight line index, gravity station index, and anomaly interpretative maps were prepared for each quadrangle. A large suite of digitally processed maps of gravity and aeromagnetic data were prepared and are included in Volume II.

  14. The Blues Poetry of Langston Hughes

    Science.gov (United States)

    Waldron, Edward E.

    1971-01-01

    The author discusses the criteria of the blues as an American art form. He then shows how Langston Hughes captures the mood, the feeling, the rhythm and the impact of the blues in his poetry. (Author/LF)

  15. Langston Hughes and his poem "Harlem"

    Institute of Scientific and Technical Information of China (English)

    郝红

    2005-01-01

    @@ James Langston Hughes was born February 1,1902, in Joplin, Missouri. His parents divorced when he was a small child, and his father moved to Mexico. He was raised by his Grandmother until he was thirteen, when he moved to Lincoln,Illinois, to live with his mother and her husband, eventually settling in Cleveland, Ohio.

  16. Responses to Hugh Heclo's "On Thinking Institutionally"

    Science.gov (United States)

    Fennell, Robert C.; Ascough, Richard S.; Liew, Tat-siong Benny; McLain, Michael; Westfield, Nancy Lynne

    2010-01-01

    Hugh Heclo's recent book "On Thinking Institutionally" (Paradigm Publishers, 2008) analyzes changes that have taken place in the past half century in how North Americans tend to think and act in institutions. The volume is receiving particular attention as it can be applied to higher education and to religious denominations, and so deserves…

  17. On the Hughes model and numerical aspects

    KAUST Repository

    Gomes, Diogo A.

    2017-01-05

    We study a crowd model proposed by R. Hughes in [11] and we describe a numerical approach to solve it. This model comprises a Fokker-Planck equation coupled with an eikonal equation with Dirichlet or Neumann data. First, we establish a priori estimates for the solutions. Second, we study radial solutions and identify a shock formation mechanism. Third, we illustrate the existence of congestion, the breakdown of the model, and the trend to the equilibrium. Finally, we propose a new numerical method and consider two examples.

  18. Donald Hugh Blocher (1928-2013).

    Science.gov (United States)

    Dowd, E Thomas

    2015-01-01

    This article memorializes Donald Hugh Blocher (1928-2013). Blocher, a giant in counseling psychology, was elected a fellow of the American Psychological Association (APA) in 1973, received a Distinguished Achievement Award from Harvard University in 1968, and served as president of APA Division 17 (Society of Counseling Psychology) in 1980. He obtained a Fulbright Lectureship at the University of Keele (United Kingdom) for 1968-1969, where he helped develop a counseling psychology program according to American standards. He also published many books, book chapters, and articles over the course of his professional career.

  19. Hugh Owen Thomas (1834-1891)

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    @@ Hugh Owen Thomas被称为英国骨科之父,他对英国乃至世界骨科作出了杰出的贡献. 早在17世纪,接骨师已经作为一个社会地位较高的职业在英国、法国兴盛起来.接骨师的技术通常是在家族内部传承而不会对外传授.

  20. Sandy ja Hugh - paar või mitte? / Hugh Grant, Sandra Bullock

    Index Scriptorium Estoniae

    Grant, Hugh, 1960-

    2003-01-01

    Romantilises komöödias "Kaks nädalat armumiseks" ("Two Weeks Notice"), režissöör Marc Lawrence, mängivad kaks kuulsat näitlejat. Staarid oma suhetest : Hugh Grant : "Sandra on geenius"; Sandra Bullock : "Oleme temaga nagu kaksikud!"

  1. Sandy ja Hugh - paar või mitte? / Hugh Grant, Sandra Bullock

    Index Scriptorium Estoniae

    Grant, Hugh, 1960-

    2003-01-01

    Romantilises komöödias "Kaks nädalat armumiseks" ("Two Weeks Notice"), režissöör Marc Lawrence, mängivad kaks kuulsat näitlejat. Staarid oma suhetest : Hugh Grant : "Sandra on geenius"; Sandra Bullock : "Oleme temaga nagu kaksikud!"

  2. Iterative Specialisation of Horn Clauses

    DEFF Research Database (Denmark)

    Nielsen, Christoffer Rosenkilde; Nielson, Flemming; Nielson, Hanne Riis

    2008-01-01

    We present a generic algorithm for solving Horn clauses through iterative specialisation. The algorithm is generic in the sense that it can be instantiated with any decidable fragment of Horn clauses, resulting in a solution scheme for general Horn clauses that guarantees soundness and terminatio...

  3. The Ram's Horn.

    Science.gov (United States)

    Rassias, John A., Ed.; And Others

    1983-01-01

    The summer-fall and winter-spring numbers of the journal, "The Ram's Horn," contain these articles: "The Text as Dramatic Departure"; "The Dartmouth Language Outreach Approach to Spanish for Police Action"; "The Dartmouth Intensive Language Model (DILM) in Florida: John Rassias with High School Teachers"; "The Flexibility of Using Drama Techniques…

  4. Acute Charles Bonnet Syndrome following Hughes procedure.

    Science.gov (United States)

    Wilson, Michelle E; Pointdujour-Lim, Renelle; Lally, Sara; Shields, Carol L; Rabinowitz, Michael P

    2016-10-01

    A 69-year-old male experienced monocular formed visual hallucinations after occlusion of the right eye following resection of eyelid basal cell carcinoma and reconstruction with a Hughes procedure (tarsoconjunctival flap). His symptoms included recurrent, well-defined, organized, complex, formed images of small children playing in the snow. These visual phenomena occurred only in the occluded eye, began several hours after surgery, and recurred intermittently several times daily for 4 days, lasting several minutes with each occurrence. The patient retained insight into the false nature of the images throughout the duration of his symptoms, and the hallucinations resolved spontaneously while the flap was still in place. To our knowledge, this is the first reported case of Charles Bonnet Syndrome (CBS) following a Hughes procedure in a patient with normal visual acuity in the non-occluded fellow eye. Unlike other reported cases of acute onset CBS following transient monocular occlusion, hallucinations in the occluded eye remitted prior to restoration of vision in the occluded eye. Ophthalmologists should be aware of the potential for CBS following even transient monocular occlusion and should consider warning patients about its potential to occur.

  5. Antiproton Focus Horn

    CERN Multimedia

    1974-01-01

    Was used for the AA (antiproton accumulator). Making an antiproton beam took a lot of time and effort. Firstly, protons were accelerated to an energy of 26 GeV in the PS and ejected onto a metal target. From the spray of emerging particles, a magnetic horn picked out 3.6 GeV antiprotons for injection into the AA through a wide-aperture focusing quadrupole magnet.For a million protons hitting the target, just one antiproton was captured, 'cooled' and accumulated. It took 3 days to make a beam of 3 x 10^11 -, three hundred thousand million - antiprotons.

  6. Hugh Blairs Lectures on Rhetoric and Belles Lettres

    DEFF Research Database (Denmark)

    Schatz-Jakobsen, Claus

    1989-01-01

    Artiklen nærlæser dekonstruktivt dele af den skotske retorikprofessor Hugh Blairs Lecures on Rhetoric and Belles Lettres (1783) og påviser splittelsen mellem to vidt forskellige retorik- og liltteraturhistoriske interesser, neoklassicistiske vs. romantiske....

  7. Síndrome de Hughes-Stovin

    Directory of Open Access Journals (Sweden)

    Sonia Pankl

    2015-04-01

    Full Text Available El síndrome de Hughes-Stovin es una entidad infrecuente caracterizada por trombosis venosa profunda y aneurismas de la arteria pulmonar, siendo su etiología y patogenia desconocida. Algunos autores la consideran una variante de la enfermedad de Behcet. Su curso natural es generalmente fatal. Se presenta con tos, disnea, hemoptisis, dolor torácico y fiebre. El tratamiento es con esteroides y agentes citotóxicos hasta la cirugía. Presentamos el caso de un hombre de 41 años que consultó por disnea, hemoptisis y dolor torácico, llegándose al diagnóstico de trombosis venosa profunda de miembro inferior derecho, trombo-embolismo de pulmón y aneurismas de arterias pulmonares. Recibió tratamiento con corticoides en altas dosis y 6 pulsos de ciclofosfamida de 1 gramo durante 6 meses, con regresión completa de los aneurismas y de la sintomatología.

  8. Horn installed in CNGS tunnel

    CERN Multimedia

    Maximilien Brice

    2005-01-01

    The horn is installed for the CERN Neutrinos to Gran Sasso (CNGS) project. Protons collide with a graphite target producing charged particles that are focussed by the magnetic field in the horn. These particles will then pass into a decay tube where they decay into neutrinos, which travel towards a detector at Gran Sasso 732 km away in Italy.

  9. Radiologic diagnosis of Fitz-Hugh-Curtis syndrome

    Institute of Scientific and Technical Information of China (English)

    WANG Cheng-lin; GUO Xue-jun; YUAN Zhi-dong; SHI Qiao; HU Xiao-hong; FANG Lin

    2009-01-01

    @@ Litz-Hugh-Curtis syndrome (FHCS) was reported by Curtis after he found a fibrous adhesion between the surface of the liver and peritoneum in patients with gonococcal pelvic inflammation during laparoscopy in 1930, and the first report by Fitz-Hugh as acute gonococcal peritonitis in the right upper quadrant abdomen was published in 1934.1,2 The so-called FHCS is believed to originate from an inflammation in the pelvis which may ascend toward the diaphragmatic surface of the liver along the right paracolic gutters to cause the inflammation of the liver caosule with right upper abdominal pain.3-7

  10. Francesca Hughes: Architecture of Error: Matter, Measure and the Misadventure of Precision

    DEFF Research Database (Denmark)

    Foote, Jonathan

    2016-01-01

    Review of "Architecture of Error: Matter, Measure and the Misadventure of Precision" by Francesca Hughes (MIT Press, 2014)......Review of "Architecture of Error: Matter, Measure and the Misadventure of Precision" by Francesca Hughes (MIT Press, 2014)...

  11. Hugh Grant's Image Restoration Discourse: An Actor Apologizes.

    Science.gov (United States)

    Benoit, William L.

    1997-01-01

    Examines the strategies used by actor Hugh Grant (in his appearances on talk shows) to help restore his reputation after he was arrested for lewd behavior with a prostitute. Uses this case as a springboard to contrast entertainment image repair with political and corporate image repair, arguing that important situational differences can be…

  12. Additional Responses to Hugh Heclo's "On Thinking Institutionally"

    Science.gov (United States)

    Lincoln, Timothy D.; Fennell, Robert C.

    2011-01-01

    Issue 13:3 of this journal (July 2010) included a "Conversation" on Hugh Heclo's recent publication "On Thinking Institutionally" (Paradigm Publishers, 2008) with a book review by Robert Fennell and responses by Richard Ascough, Tat-siong Benny Liew, Michael McLain, and Lynne Westfield. Here we publish two additional responses to this same book.…

  13. Vernon Hughes and the Quest for the Proton's Spin

    Science.gov (United States)

    Jaffe, Robert L.

    2004-12-01

    Vernon Hughes dedicated much of the latter part of his career to the question "What carries the spin of the proton?" The question remains unanswered and near the top of the list of fascinating questions in QCD. I present a perspective on the question and Vernon's pursuit of an answer.

  14. Dr. Vernon W. Hughes, 81, authority on the subatomic

    CERN Multimedia

    Lavietes, S

    2002-01-01

    "Dr. Vernon W. Hughes, a Yale physicist whose investigation of particles called muons poked holes in standard subatomic theory and provided evidence for the existence of previously undetected matter, died at Yale-New Haven Hospital last Tuesday" (1/2 page).

  15. Hugh Hefner - maailma esi-playboy / Neeme Raud

    Index Scriptorium Estoniae

    Raud, Neeme, 1969-

    2004-01-01

    Ajakirja Playboy asutajast Hugh Hefner'ist, tema elufilosoofiast ja põhimõtetest erootikaväljaande sisu kujundamisel. Ärijuhi Christie Hefner'i sõnul on rahvusvahelise multimeedia-meelelahutusfirma praeguseks eesmärgiks brändi sobitamine erinevatesse meediavormidesse. Lisa: Mis on Playboy?

  16. Differential Response: What to Make of the Existing Research? A Response to Hughes et al.

    Science.gov (United States)

    Drake, Brett

    2013-01-01

    This article is a response to "Issues in Differential Response", a review of the current evidence pertaining to differential response (DR) programs in child protective services (CPS). In my view, the Hughes, Rycus, Saunders-Adams, Hughes, and Hughes article suffers from several weaknesses. First, DR programs are critiqued as if they were…

  17. Praktijkproef covergisting van varkensmest

    NARCIS (Netherlands)

    Timmerman, M.; Claessen, P.; André, G.

    2007-01-01

    In dit rapport wordt verslag gedaan van een praktijkproef uitgevoerd naar covergisting van nevenproducten uit de levensmiddelenindustrie met varkensmest. De doelstelling van de uitgevoerde praktijkproef was het bepalen van de biogasopbrengst van vijf coproducten, de samenstelling van het biogas, de

  18. Obituary: Lawrence Hugh Aller, 1913-2003

    Science.gov (United States)

    Kaler, James B.

    2003-12-01

    Michigan, he taught a two-semester course in advanced general astronomy that covered nearly everything, in addition to a remarkable four-semester sequence in astrophysics (general, stellar atmospheres, nebular astrophysics, and stellar interiors). These were backed up by an extraordinary set of books. In 1943, Goldberg and he turned out the seminal toms, Stars, and Nebulae. (A solo third edition was published in 1991.) Then in 1953 arrived "The Atmospheres of the Sun and Stars" (revised a decade later), a tour de force on the physics of stellar plasmas and radiative transfer that became the bible of a generation of astronomers. "Nuclear Transformations, Stellar Interiors, and Nebulae" appeared a year later, and "Gaseous Nebulae" two years after that (rewritten in 1984 as "Physics of Thermal Gaseous Nebulae"). Not having a computer available in the early years, he used his students, creating mammoth "Aller Problems" that solved the equations for results that went into the books. Never formally published were two massive tomes of advanced general astronomy. To those of us lucky enough to have them, they serve as references to this day. His students, both undergraduate and graduate, are everywhere, their own students in turn carrying on Lawrence's ideas and work. In 1941, Lawrence married Rosalind Duncan Hall (who survives), and together they raised three children: Hugh, Gwen, and Raymond. Not only did one son become an astronomer, but so has one granddaughter (a dynasty established). Lawrence was absorbed by news and politics. He hated injustice of any kind, and let you know about it. He could entertain for hours with stories of his youth and of other astronomers, never realizing that he would also be the source of affectionate stories that would be told and retold by his own students. Of beautiful heart, he was a good father, both to his own children and to those he adopted as his students, none of whom, having been taught by him, will ever forget. Incredibly prolific, his

  19. Electromigration Issues in High Current Horn

    CERN Document Server

    Zhang, Wu; Hseuh, Brigitte; Sandberg, Jon; Simos, Nikolaos; Tuozzolo, Joseph; Weng, Wu-Tsung

    2005-01-01

    The secondary particle focusing horn for the AGS neutrino experiment proposal is a high current and high current density device. The peak current of horn is 300 kA. At the smallest area of horn, the current density is near 8 kA/mm2. At very high current density, a few kA/mm2, the electromigration phenomena will occur. Momentum transfer between electrons and metal atoms at high current density causes electromigration. The reliability and lifetime of focusing horn can be severely reduced by electromigration. In this paper, we discuss issues such as device reliability model, incubation time of electromigration, and lifetime of horn.

  20. Langston Hughes and his poem “Harlem”

    Institute of Scientific and Technical Information of China (English)

    郝红

    2005-01-01

    James Langston Hughes was born February 1. 1902, in Joplin, Missouri. His parents divorced when he was a small child, and his father moved to Mexico. He was raised by his Grandmother until he was thirteen, when he moved to Lincoln,Illinois, to live with his mother and her husband, eventually settling in Cleveland, Ohio. It was in I,incoln, Illinois, that Hughes began writing poetry. Following graduation, he spent a year in Mexico and a year at Columbia University. During these years, he held old jobs as an assistant cook, launderer, and a busboy, and traveled to Africa and Europe working as a seaman. In November 1924, he moved to Washington,

  1. Fitz-Hugh-Curtis综合征7例

    Institute of Scientific and Technical Information of China (English)

    焦浦生

    2000-01-01

    @@ FHC综合征Fitz-Hugh-Curtis Syntrome)是继发于盆腔感染的肝包膜炎症反应性疾病.该综合征典型临床表现是右上腹痛,发热伴有盆腔炎.现将我院近年来诊治FHC综合征7例总结中下.

  2. Bifurcaciones del Sistema de FitzHugh-Nagumo (FHN

    Directory of Open Access Journals (Sweden)

    Fernando Ongay Larios

    2011-01-01

    Full Text Available La familia paramétrica de los sistemas de FitzHugh-Nagumo es rica en bifurcaciones (Rocsoreanu et al., 2000. En este artículo estudiamos las bifurcaciones silla-nodo y de Hopf desde el punto de vista matemático de esta familia y se describen completamente los conjuntos de bifurcación en el espacio de parámetros.

  3. The Spin Structure of the Nucleon:. a Hughes Legacy

    Science.gov (United States)

    Cates, Gordon D.

    2004-12-01

    More than any other individual, Vernon Hughes can be pointed to as the father of the experimental investigation of nucleon spin structure. Even theoretical development in this area was spurred on by Vernon's pioneering efforts to make the control of spin degrees of freedom an experimental reality. This talk traces some of Vernon's work in this area, as well as examining, briefly and not in a complete fashion, some of the other work that can be looked upon as Vernon's legacy.

  4. Remembrance of Hugh E. Huxley, a founder of our field.

    Science.gov (United States)

    Pollard, Thomas D; Goldman, Yale E

    2013-09-01

    Hugh E. Huxley (1924-2013) carried out structural studies by X-ray fiber diffraction and electron microscopy that established how muscle contracts. Huxley's sliding filament mechanism with an ATPase motor protein taking steps along an actin filament, established the paradigm not only for muscle contraction but also for other motile systems using actin and unconventional myosins, microtubules and dynein and microtubules and kinesin.

  5. Hugh de Wardener - the Man and the Scientist.

    Science.gov (United States)

    Phillips, M E; de Wardener, S

    2016-02-01

    Hugh de Wardener died on 29th September 2013, ten days before his 98th birthday. He had a diverse upbringing and qualified in Medicine in 1939. He joined the army but was captured in 1942 and imprisoned in Singapore and Thailand until 1945. His clinical care of fellow prisoners was highly regarded. He preserved their clinical records and used them, post-war, to write two Lancet papers. One showed, for the first time, that Wernickes encephalopathy could be caused by severe malnutrition and cured by small doses of vitamin B1. His later academic interests were based on the emphasis he placed on renal physiology. This applied to the topic most associated with his name-Natriuretic Hormone. Whilst de Wardener never isolated this hormone, his early experiments, demonstrating that a third factor other than GFR and aldosterone affected renal sodium transport, were substantiated by others. Hugh had many research interests: pyelonephritis, renal histology, maintenance dialysis and metabolic/renal bone disease. In his later years he researched intensively into the role of sodium and salt in the aetiology of essential hypertension. Hugh was president of the International Society of Nephrology (1969-72) and the UK Renal Association (1975-78). He received many awards and recognitions from across the world, many of them after his (so-called) retirement. Throughout his career he never neglected the care of his patients. As Bob Schrier wrote in his obituary of de Wardener in Kidney International he was a caring physicianwhose dedication to his patients welfare was exemplary.

  6. RUPTURED RUDIMENTARY HORN PREGNANCY OF UNICORNUATE UTERUS

    Directory of Open Access Journals (Sweden)

    Vijay Kumar

    2015-06-01

    Full Text Available Unicornuate uterus can sometimes be associated with rudimentary horn. Pregnancy in a rudimentary horn is rare and usually ends up in rupture. Diagnosis is difficult and can be missed in routine ultrasound scan and is usually detected after rupture. We report a case of G1P1 with rudimentary horn pregnancy which raised suspicion on ultr asound and was later diagnosed by MR imaging. Patient refused termination and presented next day with shock. Laparotomy revealed ruptured right rudimentary horn pregnancy.

  7. Horn belief change: A contraction core

    CSIR Research Space (South Africa)

    Booth, R

    2010-08-01

    Full Text Available , and counterfactuals’, Artificial Intelligence, 57(2–3), 227–270, (1992). [5] S.O. Hansson, ‘Kernel contraction’, Journal of Symbolic Logic, 59(3), 845–859, (1994). [6] M. Langlois, R. Sloan, B. Szo¨re´nyi, and G. Thra´n, ‘Horn complements: Towards Horn... to its contraction counterpart. Delgrande [3] investigated two classes of contraction functions for Horn belief sets, viz. e-contraction and i-contraction, while Booth et al. [2] subsequently extended Delgrande’s work. A Horn clause has the form p1...

  8. Beperking van de aansprakelijkheid van accountants

    NARCIS (Netherlands)

    Wallage, P.

    2008-01-01

    De beperking van de aansprakelijkheid van accountants staat momenteel wereldwijd hoog op de agenda van wet- en regelgevers. Reden is de angst dat door toekenning van onevenredig hoge claims een van de 'big 4' accountantskantoren zou kunnen omvallen. De grote vier bestaan uit de internationaal georga

  9. Toepassing van maaimeststoffen - Van Strien, 2011

    NARCIS (Netherlands)

    Burgt, van der G.J.H.M.; Rietberg, P.

    2012-01-01

    Dit is het eerste tussentijdse verslag van onderzoek naar de optimalisatie van bedrijfsinterne mineralenstromen. Het onderzoek vond plaats op het bedrijf van Joost van Strien. Gezien het feit dat dit het eerste jaar is van een meerjarig onderzoek gaat het vooral om het vastleggen en beschikbaar hebb

  10. Some Numerical Aspects on Crowd Motion - The Hughes Model

    KAUST Repository

    Gomes, Diogo A.

    2016-01-06

    Here, we study a crowd model proposed by R. Hughes in [5] and we describe a numerical approach to solve it. This model comprises a Fokker-Planck equation coupled with an Eikonal equation with Dirichlet or Neumann data. First, we establish a priori estimates for the solution. Second, we study radial solutions and identify a shock formation mechanism. Third, we illustrate the existence of congestion, the breakdown of the model, and the trend to the equilibrium. Finally, we propose a new numerical method and consider two numerical examples.

  11. Miniaturization of planar horn motors

    Science.gov (United States)

    Sherrit, Stewart; Ostlund, Patrick N.; Chang, Zensheu; Bao, Xiaoqi; Bar-Cohen, Yoseph; Widholm, Scott E.; Badescu, Mircea

    2012-04-01

    There is a great need for compact, efficient motors for driving various mechanisms including robots or mobility platforms. A study is currently underway to develop a new type of piezoelectric actuators with significantly more strength, low mass, small footprint, and efficiency. The actuators/motors utilize piezoelectric actuated horns which have a very high power density and high electromechanical conversion efficiency. The horns are fabricated using our recently developed novel pre-stress flexures that make them thermally stable and increases their coupling efficiency. The monolithic design and integrated flexures that pre-stresses the piezoelectric stack eliminates the use of a stress bolt. This design allows embedding solid-state motors and actuators in any structure so that the only macroscopically moving parts are the rotor or the linear translator. The developed actuator uses a stack/horn actuation and has a Barth motor configuration, which potentially generates very large torque and speeds that do not require gearing. Finite element modeling and design tools were investigated to determine the requirements and operation parameters and the results were used to design and fabricate a motor. This new design offers a highly promising actuation mechanism that can potentially be miniaturized and integrated into systems and structures. It can be configured in many shapes to operate as multi-degrees of freedom and multi-dimensional motors/actuators including unidirectional, bidirectional, 2D and 3D. In this manuscript, we are reporting the experimental measurements from a bench top design and the results from the efforts to miniaturize the design using 2×2×2 mm piezoelectric stacks integrated into thin plates that are of the order of 3 × 3 × 0.2 cm.

  12. Voedingswaarde van planten - gewichtstoename van rupsen. Experiment

    NARCIS (Netherlands)

    Huisman, T.; Loon, van J.; Hemerik, L.

    2005-01-01

    Het doel van dit experiment is het bepalen van het effect van voedseltype op gewichtstoename. Om zo’n effect vast te stellen op een wetenschappelijke manier, worden de gegevens geanalyseerd met de Wilcoxon tweesteekproeventoets

  13. Bereiding van bilirubinestandaarden

    NARCIS (Netherlands)

    Dreumel; H.J.van; Bosman; H.A.; Derks; H.J.G.M.; Hagen-Fast; A.K.; Koedam; J.C.; Klaasen; R.; Phielix-Strubbe; C.J.; Terlingen; J.B.A.

    1986-01-01

    Dit rapport beschrijft de bereiding van vijf partijen gevriesdroogde bilirubinestandaard. De volumeverandering die optreedt tengevolge van droogvriezen en reconstitutie kon worden berekend aan de hand van bepalingen van bilirubine, kalium, chloride en radioactiviteitsmetingen in de oorspronkelij

  14. Katalytisch verbranden van varkensmest

    NARCIS (Netherlands)

    Hendriks, J.

    1995-01-01

    Door het verbranden van mest kan het mestvolume worden verkleind. Binnenkort gaat op het Varkensproefbedrijf 'Zuid- en West-Nederland' in Sterksel onderzoek van start om de mogelijkheden van het katalytisch verbranden van varkensmest te bekijken.

  15. Solving non-linear Horn clauses using a linear Horn clause solver

    DEFF Research Database (Denmark)

    Kafle, Bishoksan; Gallagher, John Patrick; Ganty, Pierre

    2016-01-01

    In this paper we show that checking satisfiability of a set of non-linear Horn clauses (also called a non-linear Horn clause program) can be achieved using a solver for linear Horn clauses. We achieve this by interleaving a program transformation with a satisfiability checker for linear Horn...... clauses (also called a solver for linear Horn clauses). The program transformation is based on the notion of tree dimension, which we apply to a set of non-linear clauses, yielding a set whose derivation trees have bounded dimension. Such a set of clauses can be linearised. The main algorithm...

  16. AA, sandwich line with magnetic horn

    CERN Document Server

    1980-01-01

    Continuation from 8010293: Finally, the sandwich line with the horn is placed on the ground, for the horn to be inspected and, if needed, exchanged for a new one. The whole procedure was trained with several members of the AA team, for quick and safe handling, and to share the radiation dose amongst them.

  17. Spherical Horn Array for Wideband Propagation Measurements

    DEFF Research Database (Denmark)

    Franek, Ondrej; Pedersen, Gert Frølund

    2011-01-01

    A spherical array of horn antennas designed to obtain directional channel information and characteristics is introduced. A dual-polarized quad-ridged horn antenna with open flared boundaries and coaxial feeding for the frequency band 600 MHz–6 GHz is used as the element of the array. Matching...

  18. Surviving To Write and Writing To Survive: The Complex Case of Langston Hughes.

    Science.gov (United States)

    Ostrom, Hans

    Studying the life of Langston Hughes in the context of how to teach freshman composition can shed light on two sometimes conflicting pedagogies, the expressivist and the social-constructionist. A discouraging period of fierce criticism, illness, depression, and financial woes coincided with Hughes' 39th birthday, which his biographer Arnold…

  19. Non-communicating Rudimentary Uterine Horn Pregnancy

    Directory of Open Access Journals (Sweden)

    I Upadhyaya

    2011-12-01

    Full Text Available Pregnancy in a non-communicating rudimentary horn is an extremely rare form of ectopic gestation. The rudimentary horn may or may not communicate with the uterine cavity with the majority of cases being non-communicating. The patient exhibits features of acute abdomen and carries a high risk of maternal death. Even modern scans remain elusive whereas laparatomy remains the confi rmatory procedure for the diagnosis. Because of the varied muscular constitution in the thickness and distensibility of the wall of the rudimentary horn, pregnancy is accommodated for a variable period of gestation. Here, we report three cases of pregnancy in a non-communicating rudimentary horn of the uterus in different periods of gestation, their outcome and a review of the available literature. Keywords: Mullerian anomalies, non-communicating rudimentary horn pregnancy, surgical management.

  20. Next steps in propositional horn contraction

    CSIR Research Space (South Africa)

    Booth, R

    2009-06-01

    Full Text Available not opted for this choice.) Our start- ing point for defining Horn e-contraction is in terms of Del- grande’s definition of e-remainder sets. Definition 3.1 (Horn e-Remainder Sets) For a belief setH , X ∈ H ↓e Φ iff (i) X ⊆ H , (ii) X 6|= Φ, and (iii... functions to be used for Horn partial meet e-contraction. Definition 3.2 (Horn e-Selection Functions) A partial meet Horn e-selection function σ is a function from P(P(LH)) to P(P(LH)) s.t. σ(H ↓e Φ) = {H} if H ↓e Φ = ∅, and ∅ 6= σ(H ↓eΦ) ⊆ H ↓e...

  1. The Progression About Fitz-Hugh-Curtis Syndrome Study%Fitz-Hugh-Curtis综合征研究进展

    Institute of Scientific and Technical Information of China (English)

    靳翠平; 尚玉敏

    2009-01-01

    Fitz-Hugh-Curtis综合征是盆腔感染合并肝周围炎,主要涉及肝包膜而无肝实质损害,在慢性盆腔炎患者中较为常见.病原菌主要是淋病奈瑟菌及衣原体,主要临床表现为右下腹痛,并可导致慢性腹痛、不孕、异位妊娠等多种并发症.可结合腹腔CT、相关实验室检验及腹腔镜检查对其进行诊断及鉴别诊断,并通过敏感抗生素及腹腔镜手术进行有效治疗.就Fitz-Hugh-Curtis综合征病因与发病机制、临床特征、并发症、诊断、治疗及相关意义进行综述.

  2. Energiebesparing bij de bewaring van plantgoed van tulp door temperatuurintegratie

    NARCIS (Netherlands)

    Gude, H.; Dijkema, M.H.G.E.

    2006-01-01

    Onderzoek naar de mogelijkheden van TI (temperatuurintegratie) bij de bewaring van tulpenplantgoed door het vaststellen van de tolerantie van enkele cultivars voor verhogingen van de dagtemperatuur en verlagingen van de nachttemperatuur

  3. Aspekte van die siekepastoraat

    Directory of Open Access Journals (Sweden)

    H. J. C. Pieterse

    1980-06-01

    Full Text Available Die siekepastoraat vra ons aandag in hierdie tyd omdat die versorging van siekes ’n kenmerk is van die koms van die koninkryk van God. God se barmhartigheid het in sy volheid tot gelding gekom in die optrede van Jesus Christus. Die volle seën van die heil van die Ryk van God hou ook die versorging van die siekes in. Deur die heilswerk van Christus sien die blindes weer, loop die kreupeles, word melaatses gereinig, hoor die dowes, word dooies opgewek (Luk. 7:22.

  4. Horn of Africa food crisis

    CERN Multimedia

    Staff Association

    2011-01-01

    YOU ARE WONDERFUL, THANK YOU! As we have indicated previously, the Horn of Africa is experiencing an extremely severe food crisis as a result of one of the toughest droughts since the early 1950s. A total of over 12 million people in Djibouti, Ethiopia, Somalia, Kenya and Uganda are severely affected by this devastating crisis and the UN has officially declared famine in these regions. In addition, children are the most vulnerable victims, with more than half a million children at risk of imminent death from severe malnutrition and an estimated 2.3 million children already malnourished. At the beginning of August we opened an account to receive your donations. We are pleased to announce that the funds received are 30’500 CHF, the total sum of which will be transferred to UNICEF. We would like to thank all those who have contributed to this important cause. Rolf Heuer Director-General Michel Goossens President of the Staff Association

  5. 12MW Horns Rev experiment

    DEFF Research Database (Denmark)

    Hasager, Charlotte Bay; Peña, A.; Mikkelsen, Torben

    The 12MW project with the full title ‘12 MW wind turbines: the scientific basis for their operation at 70 to 270 m height offshore’ has the goal to experimentally investigate the wind and turbulence characteristics between 70 and 270 m above sea level and thereby establish the scientific basis...... relevant for the next generation of huge 12 MW wind turbines operating offshore. The report describes the experimental campaign at the Horns Rev offshore wind farm at which observations from Doppler Laser LIDAR and SODAR were collected from 3 May to 24 October 2006. The challenges for mounting...... profile. Further studies on this part of the work are on-going. Technical detail on LIDAR and SODAR are provided as well as theoretical work on turbulence and atmospheric boundary layer flow. Selected results from the experimental campaign are reported....

  6. Modelsimulaties van het stadsklimaat van Rotterdam

    NARCIS (Netherlands)

    Ronda, R.J.; Steeneveld, G.J.; Hove, van B.

    2010-01-01

    Modelsimulaties zijn uitgevoerd ter inschatting van het Urban Heat Island effect van Rotterdam. Hiervoor is de meest recente versie van het Weather Research & Forecasting (WRF) model gebruikt dat is uitgerust met een Urban Canopy Model. Bovendien is gebruik gemaakt van specifieke stadeigenschapp

  7. Monitoring van verdroging; methodische aspecten van meetnetoptimalisatie

    NARCIS (Netherlands)

    Gaast, van der J.W.J.; Massop, H.T.L.; Heuvelink, G.B.M.

    2005-01-01

    In dit onderzoek (in opdracht van Natuurplanbureau) zijn methodische aspecten van verdrogingsmonitoring onderzocht. Het gaat hierbij om monitoring van de freatische grondwaterstand. Om het verdrogingsprobleem in kaart te brengen zijn op basis van een eenvoudige methode landsdekkende Gt-kaarten gemaa

  8. A Powerful Friendship: Theodore von Karman and Hugh L. Dryden

    Science.gov (United States)

    Gorn, Michael

    2003-01-01

    During their long personal friendship and professional association, Theodore von Karman (1882-1963) and Hugh L. Dryden (1898-1965) exercised a pivotal if somewhat elusive influence over American aeronautics and spaceflight. Both decisive figures in organizing scientists and engineers at home and abroad, both men of undisputed eminence in their technical fields, their range of contacts in government, academia, the armed forces, industry, and professional societies spanned the globe to an extent unparalleled then as now. Moreover, because they coordinated their activities closely, their combined influence far exceeded the sum of each one s individual contributions. This paper illustrates their personal origins as well as the foundations of their friendship, how their relationship became a professional alliance, and their joint impact on the world of aeronautics and astronautics during the twentieth century.

  9. Realistic model of compact VLSI FitzHugh-Nagumo oscillators

    Science.gov (United States)

    Cosp, Jordi; Binczak, Stéphane; Madrenas, Jordi; Fernández, Daniel

    2014-02-01

    In this article, we present a compact analogue VLSI implementation of the FitzHugh-Nagumo neuron model, intended to model large-scale, biologically plausible, oscillator networks. As the model requires a series resistor and a parallel capacitor with the inductor, which is the most complex part of the design, it is possible to greatly simplify the active inductor implementation compared to other implementations of this device as typically found in filters by allowing appreciable, but well modelled, nonidealities. We model and obtain the parameters of the inductor nonideal model as an inductance in series with a parasitic resistor and a second order low-pass filter with a large cut-off frequency. Post-layout simulations for a CMOS 0.35 μm double-poly technology using the MOSFET Spice BSIM3v3 model confirm the proper behaviour of the design.

  10. Right Pleural Effusion in Fitz-Hugh-Curtis Syndrome

    Directory of Open Access Journals (Sweden)

    Tajiri,Takuma

    2006-10-01

    Full Text Available Right pleural effusion was diagnosed in a 36-year-old woman with right upper quadrant pain and fever. Enhanced pelvic computed tomography performed because of irregular genital bleeding revealed the pelvic inflammatory disease. Upon further questioning, the patient confirmed that she had recently undergone therapy for Chlamydia trachomatis infection. Therefore she was given an injection of tetracycline because we suspected Fitz-Hugh-Curtis syndrome (FHCS, a pelvic inflammatory disease characterized by perihepatitis associated with chlamydial infection. A remarkable clinical response to antibiotics was noted. The right upper quadrant pain was due to perihepatitis, and the final diagnosis was FHCS. Right pleural effusion may be caused by inflammation of the diaphragm associated with perihepatitis. Once chlamydial infection reaches the subphrenic liver, conditions in the closed space between the liver and diaphragm due to inflammatory adhesion may be conductive to chlamydial proliferation. The possibility of FHCS should be considered in patients and carefully distinguished from other abdominal diseases.

  11. Olfactory coding in the honeybee lateral horn.

    Science.gov (United States)

    Roussel, Edith; Carcaud, Julie; Combe, Maud; Giurfa, Martin; Sandoz, Jean-Christophe

    2014-03-03

    Olfactory systems dynamically encode odor information in the nervous system. Insects constitute a well-established model for the study of the neural processes underlying olfactory perception. In insects, odors are detected by sensory neurons located in the antennae, whose axons project to a primary processing center, the antennal lobe. There, the olfactory message is reshaped and further conveyed to higher-order centers, the mushroom bodies and the lateral horn. Previous work has intensively analyzed the principles of olfactory processing in the antennal lobe and in the mushroom bodies. However, how the lateral horn participates in olfactory coding remains comparatively more enigmatic. We studied odor representation at the input to the lateral horn of the honeybee, a social insect that relies on both floral odors for foraging and pheromones for social communication. Using in vivo calcium imaging, we show consistent neural activity in the honeybee lateral horn upon stimulation with both floral volatiles and social pheromones. Recordings reveal odor-specific maps in this brain region as stimulations with the same odorant elicit more similar spatial activity patterns than stimulations with different odorants. Odor-similarity relationships are mostly conserved between antennal lobe and lateral horn, so that odor maps recorded in the lateral horn allow predicting bees' behavioral responses to floral odorants. In addition, a clear segregation of odorants based on pheromone type is found in both structures. The lateral horn thus contains an odor-specific map with distinct representations for the different bee pheromones, a prerequisite for eliciting specific behaviors.

  12. The SeaHorn Verification Framework

    Science.gov (United States)

    Gurfinkel, Arie; Kahsai, Temesghen; Komuravelli, Anvesh; Navas, Jorge A.

    2015-01-01

    In this paper, we present SeaHorn, a software verification framework. The key distinguishing feature of SeaHorn is its modular design that separates the concerns of the syntax of the programming language, its operational semantics, and the verification semantics. SeaHorn encompasses several novelties: it (a) encodes verification conditions using an efficient yet precise inter-procedural technique, (b) provides flexibility in the verification semantics to allow different levels of precision, (c) leverages the state-of-the-art in software model checking and abstract interpretation for verification, and (d) uses Horn-clauses as an intermediate language to represent verification conditions which simplifies interfacing with multiple verification tools based on Horn-clauses. SeaHorn provides users with a powerful verification tool and researchers with an extensible and customizable framework for experimenting with new software verification techniques. The effectiveness and scalability of SeaHorn are demonstrated by an extensive experimental evaluation using benchmarks from SV-COMP 2015 and real avionics code.

  13. AA, sandwich line with magnetic horn

    CERN Multimedia

    1980-01-01

    The magnetic horn, focusing the antiprotons emanating from the target, was affixed to a sandwich line through which the 150 kA pulses were supplied. Expecting to have to change from time to time the fragile horn (inner conductor only 0.7 mm thick), the assembly was designed for quick exchange. At the lower end of the sandwich line we see the connectors for the high-current cables, at the upper end the magnet horn. It has just been lifted from the V-supports which held it aligned downstream of the target. Continue with 8010293.

  14. Solving non-linear Horn clauses using a linear Horn clause solver

    DEFF Research Database (Denmark)

    Kafle, Bishoksan; Gallagher, John Patrick; Ganty, Pierre

    2016-01-01

    then proceeds by applying the linearisation transformation and solver for linear Horn clauses to a sequence of sets of clauses with successively increasing dimension bound. The approach is then further developed by using a solution of clauses of lower dimension to (partially) linearise clauses of higher......In this paper we show that checking satisfiability of a set of non-linear Horn clauses (also called a non-linear Horn clause program) can be achieved using a solver for linear Horn clauses. We achieve this by interleaving a program transformation with a satisfiability checker for linear Horn...... clauses (also called a solver for linear Horn clauses). The program transformation is based on the notion of tree dimension, which we apply to a set of non-linear clauses, yielding a set whose derivation trees have bounded dimension. Such a set of clauses can be linearised. The main algorithm...

  15. A Horn-to-Horn Power Transmission System at Terahertz Frequencies

    Science.gov (United States)

    Gonzalez, A.; Uzawa, Y.; Fujii, Y.; Kaneko, K.; Kuroiwa, K.

    2011-11-01

    A horn-to-horn power transmission system at Terahertz frequencies has been designed and tested. Power is generated at microwave frequencies and then frequency multiplied to the band 799-938 GHz. The resultant signal is radiated by a diagonal horn and redirected by two identical elliptical mirrors to another diagonal horn located far away. Useful design equations have been derived for the proposed system. The concept has been proven by careful measurements and utilized for the local oscillator injection in the Atacama Large Millimeter Array (ALMA) Band-10 receiver.

  16. De effectiviteit van tandenpoetsen

    NARCIS (Netherlands)

    van der Weijden, F.; Slot, D.E.

    2013-01-01

    Voor de preventie en behandeling van parodontitis en cariës staat de verwijdering van tandplaque centraal. Verwijderen van tandplaque en de natuurlijke reiniging van het gebit door fysiologische krachten - dat wil zeggen wrijving van de tong en de wangen - is uiterst gering (Lindhe & Wicén, 1969).

  17. Staat van zoonosen 2009

    NARCIS (Netherlands)

    Aalten M; Stenvers O; van Pelt W; Braks M; Schimmer B; Langelaar M; LZO; EPI; cib

    2011-01-01

    De Staat van zoonosen 2009 geeft een overzicht van de trends in het voorkomen bij mens en dier van verschillende zoonosen. De cijfers zijn gebaseerd op de data die jaarlijks gemeld worden aan de Europese Commissie, in het kader van Directive 2003/99/EC, over de monitoring van zoonosen en zoonotische

  18. De hand van Huizinga

    NARCIS (Netherlands)

    Huizinga, Johan

    2009-01-01

    De hand van Huizinga bevat een nieuwe selectie van de belangrijkste essays uit het omvangrijke oeuvre van de wereldberoemde Nederlandse historicus Johan Huizinga. Deze essays en studies zijn geselecteerd op basis van de diverse disciplines waarmee Huizinga zich bezighield - van de Middeleeuwen tot

  19. Effecten van clustering van vliegbewegingen van civiele helikopsters in de omgeving van Den Helder Airport

    NARCIS (Netherlands)

    Smit, C.J.

    2009-01-01

    Den Helder Airport streeft naar een uitbreiding van het aantal vliegbewegingen van "groot verkeer" van 22.000 naar 25.000 per jaar. Een dergelijke verruiming kan tot gevolg hebben dat op bepaalde tijden van de dag, met name in de vroege ochtenduren, een sterke clustering van vliegbewegingen optreedt

  20. De effectiviteit van tandenpoetsen

    NARCIS (Netherlands)

    van der Weijden, F.; Slot, D.E.

    2013-01-01

    Voor de preventie en behandeling van parodontitis en cariës staat de verwijdering van tandplaque centraal. Verwijderen van tandplaque en de natuurlijke reiniging van het gebit door fysiologische krachten - dat wil zeggen wrijving van de tong en de wangen - is uiterst gering (Lindhe & Wicén, 1969). D

  1. Effectieve bestrijding van varroa

    NARCIS (Netherlands)

    Cornelissen, B.; Blacquiere, T.; Steen, van der J.J.M.

    2010-01-01

    De varroa mijtziekte (Varroa destructor) is de belangrijkste bedreiging van de Europese honingbij. Wintersterfte van honingbijen is in de meeste gevallen toe te schrijven aan deze ziekte. Deze brochure van de WUR biedt informatie over de biologie van varroa, de effecten van varroa op honingbijen en

  2. Assembly of the magnetic horns under way

    CERN Multimedia

    Maximilien Brice

    2003-01-01

    Ahmed Cherif of the EST Division's Metrology Service checks the straightness of the inner conductor of the first magnetic horn for CNGS. The tolerance is less than one millimetre over a length of approximately 6.5 metres.

  3. Follicular infundibulum tumour presenting as cutaneous horn

    Directory of Open Access Journals (Sweden)

    Jayaraman M

    1996-01-01

    Full Text Available Tumour of follicular infundibulum is an organoid tumour with a plate like growth attached to the epidermis with connection from the follicular epithelium. We are reporting such a case unusually presenting as cutaneous horn.

  4. Planar Rotary Piezoelectric Motor Using Ultrasonic Horns

    Science.gov (United States)

    Sherrit, Stewart; Bao, Xiaoqi; Badescu, Mircea; Bar-Cohen, Yoseph; Geiyer, Daniel; Ostlund, Patrick N.; Allen, Phillip

    2011-01-01

    A motor involves a simple design that can be embedded into a plate structure by incorporating ultrasonic horn actuators into the plate. The piezoelectric material that is integrated into the horns is pre-stressed with flexures. Piezoelectric actuators are attractive for their ability to generate precision high strokes, torques, and forces while operating under relatively harsh conditions (temperatures at single-digit K to as high as 1,273 K). Electromagnetic motors (EM) typically have high rotational speed and low torque. In order to produce a useful torque, these motors are geared down to reduce the speed and increase the torque. This gearing adds mass and reduces the efficiency of the EM. Piezoelectric motors can be designed with high torques and lower speeds directly without the need for gears. Designs were developed for producing rotary motion based on the Barth concept of an ultrasonic horn driving a rotor. This idea was extended to a linear motor design by having the horns drive a slider. The unique feature of these motors is that they can be designed in a monolithic planar structure. The design is a unidirectional motor, which is driven by eight horn actuators, that rotates in the clockwise direction. There are two sets of flexures. The flexures around the piezoelectric material are pre-stress flexures and they pre-load the piezoelectric disks to maintain their being operated under compression when electric field is applied. The other set of flexures is a mounting flexure that attaches to the horn at the nodal point and can be designed to generate a normal force between the horn tip and the rotor so that to first order it operates independently and compensates for the wear between the horn and the rotor.

  5. Horn of Africa food crisis

    CERN Multimedia

    Association du personnel

    2011-01-01

    Dear colleagues, As many of you are already aware, the Horn of Africa is experiencing an extremely severe food crisis as a result of one of the toughest droughts since the early 1950s. A total of over 12 million people in Djibouti, Ethiopia, Somalia, Kenya and Uganda are severely affected by this devastating crisis and the UN has officially declared famine in these regions. In addition, children are the most vulnerable victims, with more than a half million children at risk of imminent death from severe malnutrition and an estimated 2.3 million children already malnourished. An immediate, determined mobilization is required in order to avert an imminent humanitarian catastrophe and to prevent millions of people from being robbed of a future through the scourge of hunger and malnutrition. CERN has decided to join this international mobilization by specifically opening an account for those who want to make a donation to help the drought- and famine-affected populations in the region. Children being the first...

  6. Van bulk naar kwaliteit.

    NARCIS (Netherlands)

    Ziggers, G.W.

    1993-01-01

    De uitvoering van het project IKB (Integrale Kwaliteits Beheersing) ondersteunt de marktgerichte produktie van vleeskuikens. Maatregelen moeten waarborgen geven voor een veilig en kwalitatief goed produkt en een stabilizering of vergroting van de afzetmarkt

  7. Aankoopfactoren van vlees

    NARCIS (Netherlands)

    Tacken, G.M.L.

    2001-01-01

    In het kader van het onderzoeksprogramma 'Toekomstige veehouderijsystemen' is onderzoek verricht naar duurzame en economisch haalbare veehouderijconcepten. Daarbij kwam als één van de onderwerpen de aankoopfactoren van vlees aan bod.

  8. Nieuws van het naamgevingsfront

    NARCIS (Netherlands)

    Hoffman, M.H.A.

    2008-01-01

    Wetenschappers en beleidsmakers uit de hele wereld kwamen in Wageningen bijeen om te spreken over naamgeving van cultuurgewassen. Marco Hoffman van PPO Bomen was namens de Nederlandse boomkwekerijsector van de partij en hij selecteerde de belangrijkste onderwerpen.

  9. Bewaring van knolvenkel

    NARCIS (Netherlands)

    Wijk, van C.A.P.; Ligthart, J.

    1993-01-01

    Ter verlenging van de aanvoerperiode van knolvenkel zijn van 1990 t/m '92 bewaarproeven uitgevoerd. Bewaard is bij normale luchtsamenstelling, een hoge relatieve luchtvochtigheid en lage temperatuur (0 tot +1 graden Celsius)

  10. Collectie Van den Bree

    NARCIS (Netherlands)

    Voerman, Gerrit; van den Bree, R.A.P.; Koole, Ruud

    1988-01-01

    Plaatsingslijst behorende bij het persoonlijke archief van R.A.P. van den Bree, betrekking hebbende op de Evangelische Volkspartij {EVP) (1979-1986), opgesteld door R.A.P. van den Bree en G. Voerman, 1987

  11. Ziekte van Lyme : nasleep van een tekenbeet

    NARCIS (Netherlands)

    Broek, P.; Takken, W.

    2012-01-01

    Dit themanummer beschrijft de Ziekte van Lyme en geeft een overzicht over de stand van kennis over deze complexe ziekte in Nederland. De lymeziekte is uniek omdat zij veroorzaakt wordt door een bacterie die een teek als tussengastheer (vector) gebruikt.

  12. Ziekte van Lyme : nasleep van een tekenbeet

    NARCIS (Netherlands)

    Broek, P.; Takken, W.

    2012-01-01

    Dit themanummer beschrijft de Ziekte van Lyme en geeft een overzicht over de stand van kennis over deze complexe ziekte in Nederland. De lymeziekte is uniek omdat zij veroorzaakt wordt door een bacterie die een teek als tussengastheer (vector) gebruikt.

  13. Investidura com a doctor honoris causa de l'Excm. Sr. Hugh Scott Fogler

    OpenAIRE

    Diversos autors

    2016-01-01

    Investidura com a doctor honoris causa del senyor Hugh Scott Fogler. Sessió acadèmica extraordinària, 15 d'abril de 2016. Elogi del candidat a càrrec del doctor Azael Fabregat Llagostera. Discurs d’investidura pronunciat pel senyor Hugh Scott Fogler. Paraules de benvinguda pronunciades pel doctor Josep Anton Ferré Vidal, Rector Magfc. de la Universitat.

  14. STS-40 Payload Specialist Millie Hughes-Fulford trains in JSC's SLS mockup

    Science.gov (United States)

    1987-01-01

    STS-40 Payload Specialist Millie Hughes-Fulford conducts Spacelab Life Sciences 1 (SLS-1) Experiment No. 198, Pulmonary Function During Weightlessness, in JSC's Life Sciences Project Division (LSPD) SLS mockup located in the Bioengineering and Test Support Facility Bldg 36. Hughes-Fulford monitors instruments and settings on Rack 8's panels. Behind her in the center aisle are the body mass measurement device (foreground) and the stowed bicycle ergometer.

  15. Detectie van ziektesymptomen met behulp van fluorescentiebeelden

    NARCIS (Netherlands)

    Loon, van P.C.C.

    2004-01-01

    Rapport over de positie van de biologische paddestoelenteelt op intersectoraal en (inter)-regionaal niveau. Het overzicht in tabel- en schemavorm van de stromen grondstoffen en producten verduidelijkt de intersectorale positie van de champignonteelt. Dit kan een aanzet zijn bij het signaleren en opl

  16. Belang van dispersie bij herstel van waternatuur

    NARCIS (Netherlands)

    Didderen, K.; Verdonschot, P.F.M.

    2010-01-01

    Resultaten van herstelmaatregelen in wateren vallen vaak tegen, omdat de gewenste fauna niet (terug)komt. Een belangrijke reden hiervoor is dat (her)kolonisatie van waterfauna moet plaatsvinden vanuit bronpopulaties. Om meer te weten te komen over de dispersie van macrofauna en hun verplaatsing door

  17. Routekeuze van automobilisten : resultaten van een vragenlijstonderzoek.

    NARCIS (Netherlands)

    Goldenbeld, C. Drolenga, J. & Smits, A.

    2007-01-01

    Dit rapport doet verslag van een vragenlijstonderzoek naar routekeuze van automobilisten in de regio Den Haag. Aan meer dan 400 automobilisten uit vier woongebieden op 20-25 km afstand ten noorden van Den Haag is gevraagd welke routes zij regelmatig met de auto naar Den Haag rijden, en welke alterna

  18. Vetzuur- en sterolsamenstelling van zonnebloemolie

    NARCIS (Netherlands)

    Coors, R.G.; Muuse, B.G.

    1981-01-01

    Doel van dit onderzoek is: bepaling van de gemiddelde samenstelling van de vetzuren en sterolen in ruwe zonnebloemolie. Van ca. 50 oliemonsters van zonnebloempitten met bekende herkomst werd de vetzuursamenstelling bepaald, alsmede in enkele monsters het sterolgehalte en de sterolsamenstelling.

  19. Een geschiedenis van vleesloos eten

    NARCIS (Netherlands)

    Dagevos, H.

    2009-01-01

    Recensie van de populaire editie van het proefschrift van Dirk-Jan Verdonk: Het dierloze gerecht: een vegetarische geschiedenis in Nederland. Hierin wordt de geschiedenis van het vegetarisme vanaf de tweede helft van de 19e eeuw tot nu beschreven

  20. Vetzuur- en sterolsamenstelling van zonnebloemolie

    NARCIS (Netherlands)

    Coors, R.G.; Muuse, B.G.

    1981-01-01

    Doel van dit onderzoek is: bepaling van de gemiddelde samenstelling van de vetzuren en sterolen in ruwe zonnebloemolie. Van ca. 50 oliemonsters van zonnebloempitten met bekende herkomst werd de vetzuursamenstelling bepaald, alsmede in enkele monsters het sterolgehalte en de sterolsamenstelling.

  1. Een geschiedenis van vleesloos eten

    NARCIS (Netherlands)

    Dagevos, H.

    2009-01-01

    Recensie van de populaire editie van het proefschrift van Dirk-Jan Verdonk: Het dierloze gerecht: een vegetarische geschiedenis in Nederland. Hierin wordt de geschiedenis van het vegetarisme vanaf de tweede helft van de 19e eeuw tot nu beschreven

  2. The rams horn in western history

    Science.gov (United States)

    Lubman, David

    2003-10-01

    The shofar or rams horn-one of the most ancient of surviving aerophones-may have originated with early Neolithic herders. The shofar is mentioned frequently and importantly in the Hebrew bible and in later biblical and post-biblical literature. Despite its long history, contemporary ritual uses, and profound symbolic significance to western religion, no documentation of shofar acoustical properties was found. Since ancient times, shepherds of many cultures have fashioned sound instruments from the horns of herd animals for practical and musical uses. Shepherd horns of other cultures exhibit an evolution of form and technology (e.g., the inclusion of finger holes). The shofar is unique in having retained its primitive form. It is suggested that after centuries of practical use, the shofar became emblematic of the shepherd culture. Ritual use then developed, which froze its form. A modern ritual rams horn played by an experienced blower was examined. This rather short horn was determined to have a source strength of 92 dB (A) at 1 m, a fundamental frequency near 420 Hz, and maximum power output between 1.2 and 1.8 kHz. Sample sounds and detection range estimates are provided.

  3. Toetsing van modelberekeningen van uitspoeling van zware metalen uit bodems in het landelijk gebied

    NARCIS (Netherlands)

    Bonten, L.T.C.

    2007-01-01

    Modelberekeningen van de uitspoeling van zware metalen uit bodems in het landelijk gebied zijn getoetst aan de uitspoeling op basis van stoffenbalansen van oppervlaktewatersystemen. Uit de toetsing blijkt dat uitspoeling volgens modelberekeningen niet systematisch afwijkt van uitspoeling op basis va

  4. Berekening van de verwijdering van micro-organismen bij de bereiding van drinkwater

    NARCIS (Netherlands)

    Evers EG; Groennou JTH; MGB; Kiwa

    1999-01-01

    Het microbiologisch gezondheidsrisico van drinkwater wordt gedeeltelijk bepaald door de mate van verwijdering van pathogenen gedurende het zuiveringsproces. In dit rapport worden de huidige beschikbare benaderingen om de mate van verwijdering op basis van data sets te schatten, beschreven en

  5. Kroonjuwelen van de Kaap

    NARCIS (Netherlands)

    Sluiter, L.; Schaminee, J.H.J.

    2012-01-01

    'Kroonjuwelen van de Kaap' neemt de fascinerende wereld van de Kaap onder de loep. Niet alleen de biologische rijkdom van het fynbos, maar ook de geschiedenis van het gebied en zijn bewoners. Na eeuwenlang op zichzelf te hebben geleefd, in nauw samenspel met de natuur, kregen de oorspronkelijke bewo

  6. Economische gevolgen van ontwapening

    NARCIS (Netherlands)

    Duisenberg, Willem Frederik

    1965-01-01

    Samenvatting van de gehele studie 4.1. Economie en ontwapening Ontwapening betekent in deze studie de algehele, snelle afschaffing van alle militaire maatregelen in aIle landen. Het negeren van de politieke waarschijnlijkheden die veeleer wijzen op een zeer geleidelijke afschaffing van slechts

  7. Van afval naar maaltijd

    NARCIS (Netherlands)

    Pereira da Silva, F.I.D.G.

    2013-01-01

    Het doel van het project is om te onderzoeken in hoever het benutten van afval of reststromen voor de productie van, voor mensen geschikt voedsel, haalbaar is. Door middel van een case (uitgevoerd in samenwerking met het bedrijf Smeding) worden een aantal aspecten omtrent de voedselkwaliteit en -vei

  8. Gevolgen van hydrocephalus

    NARCIS (Netherlands)

    Tromp, Cornelis Nicolaas

    1984-01-01

    Hydrocephalus is een aandoening van het centrale zenuwstelsel die de clinicus vrij lang voor grote problemen ten aanzien van de behandeling heeft qesteld. Door de toepassing van de ventriculo-atriale shunttechniek zijn de behandelingsmogelijkheden van hydrocephalus sterk verbeterd. Deze studie probe

  9. Gevolgen van hydrocephalus

    NARCIS (Netherlands)

    Tromp, Cornelis Nicolaas

    1984-01-01

    Hydrocephalus is een aandoening van het centrale zenuwstelsel die de clinicus vrij lang voor grote problemen ten aanzien van de behandeling heeft qesteld. Door de toepassing van de ventriculo-atriale shunttechniek zijn de behandelingsmogelijkheden van hydrocephalus sterk verbeterd. Deze studie

  10. Pyrolyse van acetyleenethers

    NARCIS (Netherlands)

    Rosebeek, Barthelomeus

    1961-01-01

    In het eerste hoofdstuk wordt nader ingegaan op de pyrolyse van acetyleenethers, terwijl er ook de reactie van acetyleenethers met keteen in besproken wordt. Het tweede hoofdstuk handelt over de bereiding van de uitgangsstoffen, de volgende twee hoofdstukken geven de resultaten van de pyrolysereacti

  11. Biochars van dierlijke mest

    NARCIS (Netherlands)

    Ehlert, P.A.I.; Oenema, O.

    2010-01-01

    Informatieposter over Biochars van dierlijke mest. Wereldwijd neemt de belangstelling voor pyrolyse van biomassa toe. Die belangstelling vloeit voort uit de productie van: 1) energie uit hernieuwbare biomassa; 2) grondstoffen voor de chemische industrie, ter vervanging van aardolie; 3) biochar, met

  12. Fysiotherapeutische behandeling van kaakklachten

    NARCIS (Netherlands)

    Visscher, C.M.

    2015-01-01

    In dit artikel worden verschillende behandelmogelijkheden van een orofaciaal fysiotherapeut voor de behandeling van tmd-pijn besproken. Een belangrijk onderdeel van deze behandeling bestaat uit het geven van uitleg over de aandoening en de achterliggende oorzaak, gecombineerd met adviezen over event

  13. Economische gevolgen van ontwapening

    NARCIS (Netherlands)

    Duisenberg, Willem Frederik

    1965-01-01

    Samenvatting van de gehele studie 4.1. Economie en ontwapening Ontwapening betekent in deze studie de algehele, snelle afschaffing van alle militaire maatregelen in aIle landen. Het negeren van de politieke waarschijnlijkheden die veeleer wijzen op een zeer geleidelijke afschaffing van slechts enkel

  14. Het raadsel van Utopia

    NARCIS (Netherlands)

    Berg, F. van den; Poldervaart, S.; Voogd, P. de; Dun, F. van; Bierens, S.; Raak, R. van; Dettingmeijer, R.

    2003-01-01

    Utopieën zijn gedetailleerde ontwerpen voor een andere en betere samenleving. Door de eeuwen heen zijn er talloze utopieën verschenen zoals De Republiek van Plato en Utopia van Thomas More. Ook in de twintigste eeuw zijn er utopieën verschenen als Erewhon van Samuel Butler, Walden Two van

  15. Pulmonary cytotoxicity of secondary metabolites of Stachybotrys chartarum (Ehrenb.) Hughes.

    Science.gov (United States)

    Pieckova, Elena; Hurbankova, Marta; Cerna, Silvia; Pivovarova, Zuzana; Kovacikova, Zuzana

    2006-01-01

    Damp dwellings represent suitable conditions for extended indoor moulds. A cellulolytic micromycete Stachybotrys chartarum (Ehrenb.) Hughes is considered to be a tertiary colonizer of surfaces in affected buildings. Known adverse health effects of S. chartarum result from its toxins--trichothecenes or atranones, as well as spirolactams. Mechanism of their potential pathological effects on the respiratory tract has not yet been sufficiently clarified. The cytotoxic effects of complex chloroform-extractable endo- (in biomass) and exometabolites (in cultivation medium) of an indoor S. chartarum isolate of an atranone chemotype, grown on a liquid medium with yeast extract and sucrose at 25 degrees C for 14 d, on lung tissue were evaluated in the 3-day experiment. For the purpose, 4 mg of toxicants were intratracheally instilled in 200 g Wistar male rats. A trichothecene mycotoxin diacetoxyscirpenol was used as the positive control. Bronchoalveolar lavage (BAL) parameters--viability and phagocytic activity of alveolar macrophages (AM), activity of lactate dehydrogenase, acid phosphatase and cathepsin D in cell-free BAL fluid (BALF), as well as in BAL cells, were measured. Acute exposure to the metabolites caused statistically significant changes, indicating lung tissue injury in the experimental animals. Decreased AM viability and increased activity of lysosomal enzyme cathepsin D in BAL cells after fungal exometabolite exposure were the most impressive. As toxic principles were found predominantly in the growth medium, toxins were more likely responsible for lung cell damage than e.g. fungal cell wall components. S. chartarum toxic metabolites can contribute to the ill health of occupants of mouldy building after inhalation of contaminated aerosol.

  16. RARE PRESENTATION OF RUPTURED RUDIMENTARY HORN PREGNANCY

    Directory of Open Access Journals (Sweden)

    Shergill Harbhajan K, Grover Suparna, Chhabra Ajay

    2015-10-01

    Full Text Available It is a rare occurrence for the rudimentary horn of uterus to harbour a pregnancy and the usual outcome is devastating leading to a spontaneous rupture in second trimester with the patient presenting in shock with massive intra-peritoneal haemorrhage and if appropriate management is not instituted in time it may lead to high rate of mortality. We report an unusual case of rupture rudimentary horn pregnancy who presented as a chronic ectopic with an adnexal mass and surprisingly with no sign of shock. Diagnosis is often difficult in such a situation which puts the treating gynaecologist in dilemma. High clinical suspicion supplemented with radiological findings helped clinch the diagnosis and laparotomy was performed followed by resection of the rudimentary horn to prevent future complications.

  17. Het effect van huisvesting op het welzijn van paarden

    NARCIS (Netherlands)

    Visser, E.K.

    2007-01-01

    Enkele decennia geleden werd de kennis van paarden nog automatisch overgedragen van vader op zoon, omdat veel families dagelijks met paarden werkten. Eén van de gevolgen van een veranderende manier van houden van en omgaan met paarden is het ontstaan van stress en frustratie. Een aanzienlijk deel va

  18. AA, Inner Conductor of Magnetic Horn

    CERN Multimedia

    CERN PhotoLab

    1979-01-01

    Antiprotons emerging at large angles from the production target (hit by an intense 26 GeV proton beam from the PS), were focused into the acceptance of the injection line of the AA by means of a "magnetic horn" (current-sheet lens). Here we see an early protype of the horn's inner conductor, machined from solid aluminium to a thickness of less than 1 mm. The 1st version had to withstand pulses of 150 kA, 15 us long, every 2.4 s. See 8801040 for a later version.

  19. Planck LFI flight model feed horns

    CERN Document Server

    Villa, F; Pecora, M; Figini, L; Nesti, R; Simonetto, A; Sozzi, C; Sandri, M; Battaglia, P; Guzzi, P; Bersanelli, M; Butler, R C; Mandolesi, N; 10.1088/1748-0221/4/12/T12004

    2010-01-01

    this paper is part of the Prelaunch status LFI papers published on JINST: http://www.iop.org/EJ/journal/-page=extra.proc5/jinst The Low Frequency Instrument is optically interfaced with the ESA Planck telescope through 11 corrugated feed horns each connected to the Radiometer Chain Assembly (RCA). This paper describes the design, the manufacturing and the testing of the flight model feed horns. They have been designed to optimize the LFI optical interfaces taking into account the tight mechanical requirements imposed by the Planck focal plane layout. All the eleven units have been successfully tested and integrated with the Ortho Mode transducers.

  20. Die wysgerige konsepsie van Thomas van Aquino

    Directory of Open Access Journals (Sweden)

    Thomas Van Aquino

    1976-03-01

    Full Text Available Samevattend is tot dusver die volgende aangetoon: Die werklikheid vertoon volgens Thomas 'n hierargiese struktuur. Daar is verskillende grade van syn. God is die hoogste, die volheid van syn, en by die laere synsniveaus is daar steeds 'n verdere verwydering van hierdie synsvolmaaktheid in die rigting van absolute afwesigheid van syn. Hierdie synshiërargie is volgens die vorm-materieskema opgebou. Die materie in die hoëre synslaag word vorm vir die laere, of omgekeerd: die vorm van die laere is die materie vir die hoëre dinge. God is absoluut suiwer vorm of wet (essensie. Die vorme van die dinge is die goddelike wet (genoem exemplar, similitudo, ratio, verbum of imago wat deur God daarin geskape is. God druk op dié wyse sy gelykenis op kreatuur.like wyse uit. Sy absolute volmaaktheid kan alleen tot uitdrukking gebring word deur 'n veelheid en verskeidenheid van geskape dinge. God word deur Thomas die causa effiaiens en exemplaris genoem. Die verhouding tussen Skepper en geskape werklikheid is dus dié van oorsaak en gevolg. As gevolg van sy wetsidee word daar deur Thomas dus nie duidelik tussen Skepper en skepping onderskei nie, want skepping beteken volgens hom onder andere dat God iets goddeliks (die wet in die dinge lê. Via die goddelike wet in die dinge ingeskape, is daar 'n sekere kontinuiteit tussen God en kosmos.

  1. Aansprakelijkheid : Een teken van kwaliteit

    NARCIS (Netherlands)

    van Lent, L.A.G.M.; Eken, R.C.W.

    1995-01-01

    Het vraagstuk van de aansprakelijkheid van accountants is actueler dan ooit. In het onderliggende artikel wordt een theoretische beschouwing gegeven van de economische gevolgen van het beperken van de aansprakelijkheid van accountants. De beschouwing wordt ondersteund door middel van de uitkomsten v

  2. Clinical outcome of Fitz-Hugh-Curtis syndrome mimicking acute biliary disease

    Institute of Scientific and Technical Information of China (English)

    Seong Yong Woo; Jin Il Kim; Dae Young Cheung; Se Hyun Cho; Soo-Heon Park; Joon-Yeol Han; Jae Kwang Kim

    2008-01-01

    AIM: To analyze the clinical characteristics of patients diagnosed with Fitz-Hugh-Curtis syndrome.METHODS: The clinical courses of patients that visited St. Mary's Hospital with abdominal pain from January 2005 to December 2006 and were diagnosed with Fitz-Hugh-Curtis syndrome were examined.RESULTS: Fitz-Hugh-Curtis syndrome was identified in 22 female patients of childbearing age; their mean age was 31.0 + 8.1 years. Fourteen of these cases presented with pain in the upper right abdomen alone or together with pain in the lower abdomen,and six patients presented with pain only in the lower abdomen. The first impression at the time of visit was acute cholecystitis or cholangitis in 10 patients and acute appendicitis or pelvic inflammatory disease in eight patients. Twenty-one patients were diagnosed by abdominal computer tomograghy (CT), and the results of abdominal sonography were normal for 10 of these patients. Ch/amydia trichomatis was isolated from 18 patients. Two patients underwent laparoscopic adhesiotomy and 20 patients were completely cured by antibiotic treatment.CONCLUSION: For women of childbearing age with acute pain in the upper right abdomen alone or together with pain in the lower abdomen, Fitz-HughCurtis syndrome should be considered during differential diagnosis. Moreover, in cases suspected to be Fitz-HughCurtis syndrome, abdominal c-r, rather than abdominal sonography, assists in the diagnosis.

  3. The horn bases of the Reedbuck Redunca arundinum

    Directory of Open Access Journals (Sweden)

    H. Jungius

    1975-07-01

    Full Text Available The structure and function of the horn bases of the reedbuck Redunca arundinum are discussed. It is shown that the white colouration which often occurs is not caused by glandular secretion but by small horn particles which are shed, exposing the lighter coloured material underneath. The shining horn base probably plays a role in the display behaviour of males.

  4. Assembly of the magnetic horns under way

    CERN Multimedia

    2003-01-01

    One of the key components of the CNGS facility is the system of magnetic lenses, known as horns, which are to point the pions and kaons that will decay into muons and muon-neutrinos in the direction of the Gran Sasso Laboratory. Positioned at the end of the target, which produces the pions and kaons, the system comprises two of these horns. The first focuses the positively charged pions and kaons, which have an energy of approximately 35 GeV, and defocuses the negative particles. Unfortunately, it has a tendency to cause excessive deflection of particles that have energies of less than 35 GeV and insufficient deflection of those with energies of more than 35 GeV. These negative effects are corrected by the second horn (also known as the reflector), which is positioned 40 metres from the first. Ahmed Cherif of the EST Division's Metrology Service checks the straightness of the inner conductor of the first magnetic horn for CNGS. The tolerance is less than one millimetre over a length of approximately 6.5 metre...

  5. Het planetarium van Hartog van Laun

    Directory of Open Access Journals (Sweden)

    Hans Hooijmaaijers

    2009-12-01

    Full Text Available The instrument maker Hartog van Laun devised a special table for an orrery, a lunarium and a tellurium. Van Laun made these instruments for educational purposes, but what makes his planetariums so interesting is the great variety and accuracy of demonstrations one can perform with them. In this paper I will deal with Van Laun and his instrument makers business. I will outline the design of the planetarium and some of the firm’s other instruments. Furthermore I will demonstrate that the detailed description of the planetarium made by Professor Jan Hendrik van Swinden boosted the spread of the instrument.

  6. Case of Fitz-Hugh-Curtis syndrome in male without presentation of sexually transmitted disease.

    Science.gov (United States)

    Yi, Haram; Shim, Chan Sup; Kim, Gyu Won; Kim, Jung Seok; Choi, In Zoo

    2015-11-16

    Fitz-Hugh-Curtis syndrome is a type of perihepatitis that causes liver capsular infection without infecting the hepatic parenchyma or pelvis. Fitz-Hugh-Curtis syndrome is known to occur commonly in women of childbearing age who do not use oral contraceptives and have sexual partners older than 25 years of age. However, the syndrome has been reported to occur rarely in males. The clinical symptoms are right upper quadrant pain and tenderness, and pleuritic right sided chest pain. The clinical presentation is similar in male and female. We experienced a case of Fitz-Hugh-Curtis syndrome in a 60-year-old man with the chief complaint of right upper quadrant abdominal pain. Despite a previous history of gonorrhea, we have also described our experiences of improved symptoms and recovery with allopathic medicines and have thereby reported the present case with a literature review.

  7. Real time optical edge enhancement using a Hughes liquid crystal light valve

    Science.gov (United States)

    Chao, Tien-Hsin

    1989-01-01

    The discovery of an edge enhancement effect in using a Hughes CdS liquid crystal light valve (LCLV) is reported. An edge-enhanced version of the input writing image can be directly obtained by operating the LCLV at a lower bias frequency and bias voltage. Experimental conditions in which this edge enhancement effect can be optimized are described. Experimental results show that the SNR of the readout image using this technique is superior to that obtained using high-pass filtering. The repeatability of this effect is confirmed by obtaining an edge enhancement result using two different Hughes LCLVs. The applicability of this effect to improve discrimination capability in optical pattern recognition is addressed. The results show that the Hughes LCLV can be used in both continuous tone and edge-enhancing modes by simply adjusting its bias conditions.

  8. On the Hughes' model for pedestrian flow: The one-dimensional case

    KAUST Repository

    Di Francesco, Marco

    2011-02-01

    In this paper we investigate the mathematical theory of Hughes\\' model for the flow of pedestrians (cf. Hughes (2002) [17]), consisting of a non-linear conservation law for the density of pedestrians coupled with an eikonal equation for a potential modelling the common sense of the task. For such an approximated system we prove existence and uniqueness of entropy solutions (in one space dimension) in the sense of Kružkov (1970) [22], in which the boundary conditions are posed following the approach of Bardos et al. (1979) [7]. We use BV estimates on the density ρ and stability estimates on the potential Π in order to prove uniqueness. Furthermore, we analyze the evolution of characteristics for the original Hughes\\' model in one space dimension and study the behavior of simple solutions, in order to reproduce interesting phenomena related to the formation of shocks and rarefaction waves. The characteristic calculus is supported by numerical simulations. © 2010 Elsevier Inc.

  9. Real time optical edge enhancement using a Hughes liquid crystal light valve

    Science.gov (United States)

    Chao, Tien-Hsin

    1989-01-01

    The discovery of an edge enhancement effect in using a Hughes CdS liquid crystal light valve (LCLV) is reported. An edge-enhanced version of the input writing image can be directly obtained by operating the LCLV at a lower bias frequency and bias voltage. Experimental conditions in which this edge enhancement effect can be optimized are described. Experimental results show that the SNR of the readout image using this technique is superior to that obtained using high-pass filtering. The repeatability of this effect is confirmed by obtaining an edge enhancement result using two different Hughes LCLVs. The applicability of this effect to improve discrimination capability in optical pattern recognition is addressed. The results show that the Hughes LCLV can be used in both continuous tone and edge-enhancing modes by simply adjusting its bias conditions.

  10. Gedrag van gechloreerde koolwaterstoffen in de bodem ; resultaten van kolomproeven

    NARCIS (Netherlands)

    Lagas; P.; Snell; M.C.; Kappers; F.I.; Pool; W.G.; Berg; S. van den

    1986-01-01

    Het gedrag van gechloreerde koolwaterstoffen in de bodem werd in het laboratorium onder gecontroleerde omstandigheden onderzocht met behulp van grondkolommen van 10 cm. In de kolommen werden profielen opgebouwd van een drietal verschillende grondsoorten: podzol, eerdgrond en veen, met organisch

  11. Bibliografie van de geschiedenis van de Nederlandse tuinarchitectuur 2000

    NARCIS (Netherlands)

    Dijkstra, A.; Missel, L.

    2001-01-01

    Deze bibliografie is een selectie van publicaties over de geschiedenis van tuinen, parken, buitenplaatsen, begraafplaatsen en groenvoorzieningen. Deze titels vormen een onderdeel van een bestand TUINPAD van ruim 2200 titels, die via internet te raadplegen zijn

  12. Penile cutaneous horn: An enigma-newer insights and perspectives

    Directory of Open Access Journals (Sweden)

    Kaliaperumal Karthikeyan

    2015-01-01

    Full Text Available Cutaneous horn refers to unusually cohesive keratinized material and not a true pathologic diagnosis. Though cutaneous horn has been described at various sites, horn over the penis is very rare and represents the most unusual site. The role of chronic irritation, phimosis, surgical trauma and radiotherapy have been implicated in penile horn formation. Penile horns present as elongated, keratinous, white or yellowish projections that range from a few millimeters to centimeters in size arising from the glans penis. Histopathology of the keratotic mass reveals nothing but keratin. The underlying mass may vary from verruca vulgaris to squamous cell carcinoma. The treatment is based on the pathology.

  13. Symposium Festschrift Hughes (Vernon W) to Celebrate his 70th birthday

    CERN Document Server

    1992-01-01

    The contents of this book are derived from a celebration of the 70th birthday of Vernon W Hughes. Professor Hughes' career has touched on several areas in modern physics ranging from precision measurements of the fundamental properties of atoms to measurements of spin structure functions of the proton via deep inelastic muon scattering at the world's highest energy fixed target machines. This observance of his 70th birthday brings together experimental and theoretical physicists who are leaders of the many fields in which he has made contributions.

  14. De acceptatie van innovaties in de context van een netwerksamenleving

    NARCIS (Netherlands)

    Hillebrand, B.; Driessen, P.H.; Kok, R.A.W.

    2010-01-01

    De acceptatie van nieuwe producten is in de literatuur uitgebreid bestudeerd. Maar er is weinig aandacht besteed aan de acceptatie van nieuwe producten in de context van een netwerksamenleving. In een netwerksamenleving hangt de acceptatie van een nieuw product niet alleen af van de bereidheid van k

  15. Mogelijkheden tot productie van beertjes

    NARCIS (Netherlands)

    Scholten, R.; Huiskes, J.

    1994-01-01

    In opdracht van het Produktschap Vee en Vlees is het project Mogelijkheden tot productie van vleesbeertjes en afzet van vlees en vleesproducten hiervan uitgevoerd. De afzetmogelijkheden voor vlees van beertjes zijn en blijven vooralsnog minimaal

  16. De metamorfoses van het Justus van Effencomplex

    NARCIS (Netherlands)

    Van Emstede, C.I.C.

    2012-01-01

    De Justus van Effencomplex in Spangen, dat architect Michiel Brinkman in 1918 ontwierp, werd in 1985 bijgeschreven in het monumentenregister. Een ingrijpende renovatie vondplaats tussen 1983 en 1989 in het kader van de Rotterdamse stadsvernieuwing. In 2010 was het complex echter opnieuw in zo een

  17. De effectiviteit van daltononderwijs

    NARCIS (Netherlands)

    van der Zee, Symen

    2015-01-01

    In dit proefschrift is de effectiviteit van daltononderwijs onderzocht. De eerste vraag waarop is ingegaan, is waarom daltononderwijs focust op effectiviteit. De belangrijkste reden hiervoor blijkt de discussie in de samenleving te zijn over de doeltreffendheid van vernieuwend onderwijs. Vervolgens

  18. Microbieel aanzuren van vleesvarkensmest

    NARCIS (Netherlands)

    Hendriks, J.; Vrielink, M.

    1994-01-01

    Het Praktijkonderzoek Varkenshouderij onderzoekt op het Varkensproefbedrijf te Raalte het effect van het microbieel aanzuren van vleesvarkensmest op de ammoniakemissie. Hierbij wordt de mest aangezuurd met melkzuur, geproduceerd door melkzuurbacteriën.

  19. Weidegang van geiten

    NARCIS (Netherlands)

    Eekeren, van N.J.M.

    2011-01-01

    Weidegang is belangrijk voor het welzijn van geiten. Daarmee is het een essentieel onderdeel van de bedrijfsvoering en bovendien onderscheidend voor de biologische geitenhouderij. Helaas levert weidegang bij geiten ook een aantal knelpunten op zoals: het risico op een maagdarmwormenbesmetting,

  20. 77 FR 1975 - Union Pacific Railroad Company-Discontinuance of Service Exemption-in Pittsburg, Hughes, and...

    Science.gov (United States)

    2012-01-12

    ..., Hughes, and Seminole Counties, Okla. (the line). The line traverses United States Postal Service Zip... discontinue service over a portion of a line of railroad known as the Shawnee Branch Line, between milepost... in Hughes County, which makes the line 0.19 miles longer than the terminal mileposts would...

  1. Rivers and Hughes's Construction of Black Culture in White America——Textual Analysis of "The Negro Speaks of RAvers"

    Institute of Scientific and Technical Information of China (English)

    曾慧

    2009-01-01

    Langston Hughes's central purpose in writing is "to explain and illuminate the Negro condition in America". By means of textual analysis, this thesis is to discover how the images of rivers in "The Negro Speaks of Rivers" construct the black culture, to find Hughes's identity in America.

  2. Benaderingen van over

    NARCIS (Netherlands)

    Boer, M.G. de

    2010-01-01

    SAMENVATTING In dit hoofdstuk wordt de relatie tussen de betekenissen van het Nederlandse voorzetsel over en een aantal corpora bestudeerd. Het hoofdstuk begint met een analyse van de voorbeelden uit Uit het leven van Dik Trom (1891); daarna wordt de woordenboekinformatie behandeld en vergeleken me

  3. Bronnen van diffuse bodembelasting

    NARCIS (Netherlands)

    Lijzen JPA; Ekelenkamp A; LBG; DGM/BO

    1995-01-01

    Ten behoeve van het preventieve bodembeleid was onvoldoende duidelijk welke bijdrage diverse bronnen leveren aan diffuse bodembelasting. Doel van deze inventarisatie was beschikbare kennis over diffuse bodembelasting te bundelen en kennis-lacunes aan te geven. Nevendoel is het beschrijven van de

  4. Handelsstromen van pluimveevlees

    NARCIS (Netherlands)

    Tacken, G.M.L.; Horne, van P.L.M.

    2006-01-01

    Dit onderzoek geeft inzicht in de goederenstromen van (rauw) pluimveevlees binnen en vooral naar Nederland en de daarmee gepaard gaande zoönoserisico's. Het onderzoek biedt input voor het nog op te zetten controlebeleid, waarmee handhaving van het beleidsvoornemen om het aanbieden van rauw pluimveev

  5. Certificering van biologische restaurants

    NARCIS (Netherlands)

    Soethoudt, J.M.

    2006-01-01

    In Nederland zijn meer dan 100 restaurants, die zichzelf als biologisch restaurant presenteren. Echter, de betekenis van 'biologisch restaurant' is niet gedefinieerd, zodat de consument niet weet waar hij op kan rekenen. Het idee, ontstaan bij Eric van Veluwen van Kasteel Rhederoord, tot verkenning

  6. Handelsstromen van pluimveevlees

    NARCIS (Netherlands)

    Tacken, G.M.L.; Horne, van P.L.M.

    2006-01-01

    Dit onderzoek geeft inzicht in de goederenstromen van (rauw) pluimveevlees binnen en vooral naar Nederland en de daarmee gepaard gaande zoönoserisico's. Het onderzoek biedt input voor het nog op te zetten controlebeleid, waarmee handhaving van het beleidsvoornemen om het aanbieden van rauw

  7. Het telefoonnummer van God

    NARCIS (Netherlands)

    Jansen, J.J.G.

    2004-01-01

    Er zijn duizenden moslims die twijfelen. Die er aan twijfelen of de verschrikkingen van de Hel wel echt bestaan. Die niet zeker weten of de Koran wel precies het letterlijke woord van God is. Die zich afvragen op de profeet van de islam, Mohammed (570-632), nog wel een goed voorbeeld vormt voor de

  8. Teelt van hybride wintertarwerassen

    NARCIS (Netherlands)

    Timmer, R.D.; Paauw, J.G.M.

    2003-01-01

    Om de mogelijkheden van de teelt van hybride wintertarwerassen onder Nederlandse omstandigheden in beeld te brengen zijn er van 2000-2002 proeven uitgevoerd op het PPO-proefbedrijf te Lelystad. In deze proeven zijn een 4-tal hybriderassen (Hybnos, Hyno-braba, Hyno-esta, Mercury) vergeleken met een s

  9. Certificering van biologische restaurants

    NARCIS (Netherlands)

    Soethoudt, J.M.

    2006-01-01

    In Nederland zijn meer dan 100 restaurants, die zichzelf als biologisch restaurant presenteren. Echter, de betekenis van 'biologisch restaurant' is niet gedefinieerd, zodat de consument niet weet waar hij op kan rekenen. Het idee, ontstaan bij Eric van Veluwen van Kasteel Rhederoord, tot verkenning

  10. Van landbouw naar landschap

    NARCIS (Netherlands)

    Pessers, D.W.J.M.; Kistenkas, F.H.

    2010-01-01

    De weg van de aloude Mansholt doctrine naar een geheel nieuw Europees Gemeenschappelijk Landbouwbeleid (GBL) is lang. Het voordeel van de huidige mervoudige crisis kan evenwel zijn dat er eindelijk ens schot komt in de omvorming van de traditionele kwantiteitslandbouw naar een duurzame kwaliteitslan

  11. Idola van de crossmedia

    NARCIS (Netherlands)

    Vliet, H.M.M. van; Twisk, Job; Winkel, Kees; Fröling, Hans; Bakker, Geeske; Hekman, Erik

    2008-01-01

    De uitingen van de crossmedia dringen zich steeds nadrukkelijker aan ons op. Een toenemend aantal crossmedia diensten en producten doet een beroep op onze aandacht en financiën: van interactieve televisieprogramma’s op websites, tot themakanalen op mobiele apparaten, fysieke bijeenkomsten van on

  12. Benaderingen van over

    NARCIS (Netherlands)

    Boer, M.G. de

    2010-01-01

    SAMENVATTING In dit hoofdstuk wordt de relatie tussen de betekenissen van het Nederlandse voorzetsel over en een aantal corpora bestudeerd. Het hoofdstuk begint met een analyse van de voorbeelden uit Uit het leven van Dik Trom (1891); daarna wordt de woordenboekinformatie behandeld en vergeleken

  13. Het nut van stadsgroen

    NARCIS (Netherlands)

    Hop, M.E.C.M.

    2013-01-01

    In de afgelopen jaren is de belangstelling voor de functies van beplanting in de stad sterk toegenomen. Want deze zogenaamde ecosysteemdiensten blijken belangrijk te zijn voor de leefbaarheid van de stad. PPO geeft een overzicht van de recente bevindingen op dit gebied, gebaseerd op het “Themaonderz

  14. Benaderingen van over

    NARCIS (Netherlands)

    Boer, M.G. de

    2010-01-01

    SAMENVATTING In dit hoofdstuk wordt de relatie tussen de betekenissen van het Nederlandse voorzetsel over en een aantal corpora bestudeerd. Het hoofdstuk begint met een analyse van de voorbeelden uit Uit het leven van Dik Trom (1891); daarna wordt de woordenboekinformatie behandeld en vergeleken me

  15. Emissies en bestrijdingsmaatregelen van ammoniak

    NARCIS (Netherlands)

    Laurier; M.B.H.M.

    1984-01-01

    In dit rapport wordt een overzicht gegeven van ammoniakemissies en van rendementen en kosten van maatregelen om deze te bestrijden. Op basis van gegevens van het Centraal Planbureau is een project voor 1990 en 2000 gemaakt van de mestproduktie en daarmee samenhangde ammoniakuitworp op landelijke

  16. Hierarchical State Machines as Modular Horn Clauses

    Directory of Open Access Journals (Sweden)

    Pierre-Loïc Garoche

    2016-07-01

    Full Text Available In model based development, embedded systems are modeled using a mix of dataflow formalism, that capture the flow of computation, and hierarchical state machines, that capture the modal behavior of the system. For safety analysis, existing approaches rely on a compilation scheme that transform the original model (dataflow and state machines into a pure dataflow formalism. Such compilation often result in loss of important structural information that capture the modal behaviour of the system. In previous work we have developed a compilation technique from a dataflow formalism into modular Horn clauses. In this paper, we present a novel technique that faithfully compile hierarchical state machines into modular Horn clauses. Our compilation technique preserves the structural and modal behavior of the system, making the safety analysis of such models more tractable.

  17. AA, inner conductor of a magnetic horn

    CERN Multimedia

    CERN PhotoLab

    1981-01-01

    At the start-up of the AA and during its initial operation, magnetic horns focused the antiprotons emanating from the production target. These "current-sheet lenses" had a thin inner conductor (for minimum absorption of antiprotons), machined from aluminium to wall thicknesses of 0.7 or 1 mm. The half-sine pulses rose to 150 kA in 8 microsec. The angular acceptance was 50 mrad.

  18. Fos, nociception and the dorsal horn.

    Science.gov (United States)

    Coggeshall, Richard E

    2005-12-01

    The protooncogene c-fos is rapidly activated after noxious stimuli to express the protein Fos in spinal dorsal horn neurons that are in the 'correct' locations for nociceptive information transfer. As such, therefore, mapping Fos expression in these neurons is at present the best global marker for efficiently locating populations of neurons in the awake animal that respond to nociceptive input. This allows, among other things, precise behavioral measurements to be correlated with Fos expression. Two arenas where mapping dorsal horn Fos expression has made a major impact are in the anatomy of nociceptive systems and as a useful assay for the analgesic properties of various therapeutic regimens. Also Fos expression is the only way to map populations of neurons that are responding to non-localized input such as withdrawal after addiction and vascular occlusion. Another insight is that it shows a clear activation of neurons in superficial 'pain-processing' laminae by innocuous stimuli after nerve lesions, a finding that presumably bears on the allodynia that often accompanies these lesions. It is to be understood, however, that the Fos localizations are not sufficient unto themselves, but the major function of these studies is to efficiently locate populations of cells in nociceptive pathways so that powerful anatomic and physiologic techniques can be brought to bear efficiently. Thus, the purpose of this review is to summarize the studies whose numbers are geometrically expanding that deal with Fos in the dorsal horn and the conclusions therefrom.

  19. LS1 Report: Thank you magnetic horn!

    CERN Multimedia

    Antonella Del Rosso & Katarina Anthony

    2014-01-01

    Experiments at the Antimatter Decelerator (AD) have been receiving beams since the beginning of this week. There is a crucial element at the heart of the chain that prepares the antiproton beam: the so-called magnetic horn, a delicate piece of equipment that had to be refurbished during LS1 and that is now showing just how well it can perform.   View from the top of the target and horn trolley, along the direction of the beam. Antiprotons for the AD are produced by smashing a beam of protons from the PS onto an iridium target. However, the particles produced by the nuclear interactions are emitted at very wide angles; without a focussing element, all these precious particles would be lost. “A magnetic horn is placed at the exit of the target to focus back a large fraction of the negative particles, including antiprotons, parallel to the beam line and with the right momentum,” explains Marco Calviani, physicist in the EN Department and the expert in charge of the AD targe...

  20. IN MEMORIAM: Hugh P Kelly, 3 September 1931 - 29 June 1992

    Science.gov (United States)

    Hansen, Jørgen E.

    1993-01-01

    It is said that Racah was one of the few physicists who was able not only to read Hermann Weyl's book "The Theory of Groups and Quantum Mechanics" but also to understand enough to use it himself. Something similar applies to Hugh Kelly, who introduced the methods of Many-Body Perturbation Theory (MBPT), which was being developed by nuclear physicists like Keith Brueckner whom Hugh worked with as a post-doc, into atomic physics. Since atomic physics with its "known" forces is a perfect area in which to apply the methods of MBPT, it is clear that this would have happened sooner or later. Hugh Kelly's achievement is that it happened very early. Hugh's death this summer after a long battle with cancer is a great loss to atomic physics and to his many friends in the community. Hugh P Kelly got his PhD from the University of California at Berkeley in 1963 under the supervision of Kenneth Watson and in 1965 he was hired as assistant Professor at the University of Virginia. His appointment was to a large extent due to the support of M E Rose, also a nuclear physicist with interest in atoms as is clear from his book "Elementary Theory of Angular Momentum". Hugh remained at the University of Virginia for the rest of his life, over the years serving as Department Chairman, Faculty Dean and, during the last years, as University Provost, but throughout Hugh pursued his real passion which was Physics. It is a clear sign of his dedication that he is sole author on a large number of papers particularly of course in the early years when he alone was Atomic Theory in Charlottesville. Hugh contributed to many areas of atomic physics although early on photoionization became his favourite subject and the one where he made his main contribution: first for closed shell atoms, but later extending his techniques to open shell systems for which the normal MBPT techniques did not apply. Hugh had a good nose for finding projects that were of topical interest and many of his papers are

  1. 75 FR 24973 - United States v. Baker Hughes Inc., et al.

    Science.gov (United States)

    2010-05-06

    .... IV. Trade and Commerce A. Background 1. Overview of Drilling and Completion Process 11. Offshore... impose on each other's pricing. Post merger, Baker Hughes will likely find it profitable to raise the... transaction may present a profitable opportunity to remove one or two vessels from the Gulf, an opportunity...

  2. The Political Economy of Rhetorical Style: Hugh Blair's Response to the Civic-Commercial Dilemma

    Science.gov (United States)

    Longaker, Mark Garrett

    2008-01-01

    Recent scholarship treats Hugh Blair's "Lectures" on Rhetoric and Belles Lettres (1783) as an effort to endorse either the liberal or the civic political traditions in eighteenth-century Scotland. This essay questions this orthodoxy by reading the "Lectures", and in particular Blair's attention to considerations of rhetorical…

  3. Markov chain Monte Carlo approach to parameter estimation in the FitzHugh-Nagumo model

    DEFF Research Database (Denmark)

    Jensen, Anders Christian; Ditlevsen, Susanne; Kessler, Mathieu

    2012-01-01

    Excitability is observed in a variety of natural systems, such as neuronal dynamics, cardiovascular tissues, or climate dynamics. The stochastic FitzHugh-Nagumo model is a prominent example representing an excitable system. To validate the practical use of a model, the first step is to estimate m...

  4. Principles and Practices Fostering Inclusive Excellence: Lessons from the Howard Hughes Medical Institute's Capstone Institutions

    Science.gov (United States)

    DiBartolo, Patricia Marten; Gregg-Jolly, Leslie; Gross, Deborah; Manduca, Cathryn A.; Iverson, Ellen; Cooke, David B., III; Davis, Gregory K.; Davidson, Cameron; Hertz, Paul E.; Hibbard, Lisa; Ireland, Shubha K.; Mader, Catherine; Pai, Aditi; Raps, Shirley; Siwicki, Kathleen; Swartz, Jim E.

    2016-01-01

    Best-practices pedagogy in science, technology, engineering, and mathematics (STEM) aims for inclusive excellence that fosters student persistence. This paper describes principles of inclusivity across 11 primarily undergraduate institutions designated as Capstone Awardees in Howard Hughes Medical Institute's (HHMI) 2012 competition. The Capstones…

  5. The Political Economy of Rhetorical Style: Hugh Blair's Response to the Civic-Commercial Dilemma

    Science.gov (United States)

    Longaker, Mark Garrett

    2008-01-01

    Recent scholarship treats Hugh Blair's "Lectures" on Rhetoric and Belles Lettres (1783) as an effort to endorse either the liberal or the civic political traditions in eighteenth-century Scotland. This essay questions this orthodoxy by reading the "Lectures", and in particular Blair's attention to considerations of rhetorical style, against their…

  6. "Comments on Greenhow, Robelia, and Hughes": Expanding the New Literacies Conversation

    Science.gov (United States)

    Leu, Donald J.; O'Byrne, W. Ian; Zawilinski, Lisa; McVerry, J. Greg; Everett-Cacopardo, Heidi

    2009-01-01

    Using a popularized notion such as Web 2.0 limits research efforts by employing a binary construct, one initially prompted by commercial concerns. Instead, the authors of this article, commenting on Greenhow, Robelia, and Hughes (2009), suggest that continuous, not dichotomous, change in the technologies of literacy and learning defines the…

  7. Een analyse van kosten en baten van de invoering van latexvrije handschoenen in ziekenhuizen

    NARCIS (Netherlands)

    Bovenkamp, J.M. van de; Gallis, R.; Miedema, E.P.

    2003-01-01

    De beroepsziekte ‘latex allergie' komt steeds meer voor. Op verzoek van de branchebegeleidingscommissie in het kader van het arboconvenant algemene ziekenhuizen heeft TNO Arbeid een analyse gemaakt van de kosten en baten van de invoering van non-latex handschoenen. De analyse van kosten en baten ric

  8. Optimaal beheer van hakhoutpercelen voor biomassaproductie

    NARCIS (Netherlands)

    Stobbelaar, D.J.

    2011-01-01

    Door het doelbewust inzetten van biomassa kunnen de doelstellingen energieproductie, natuurkwaliteit, cultuurhistorie en gezonde exploitatie van houtige elementen in samen worden opgepakt. Op basis van studentenonderzoek van hogeschool Van Hall / Larenstein blijkt dat de optimale mix van deze vier d

  9. When ontogeny reveals what phylogeny hides: gain and loss of horns during development and evolution of horned beetles.

    Science.gov (United States)

    Moczek, Armin P; Cruickshank, Tami E; Shelby, Andrew

    2006-11-01

    How ecological, developmental and genetic mechanisms interact in the genesis and subsequent diversification of morphological novelties is unknown for the vast majority of traits and organisms. Here we explore the ecological, developmental, and genetic underpinnings of a class of traits that is both novel and highly diverse: beetle horns. Specifically, we focus on the origin and diversification of a particular horn type, those protruding from the pronotum, in the genus Onthophagus, a particularly speciose and morphologically diverse genus of horned beetles. We begin by documenting immature development of nine Onthophagus species and show that all of these species express pronotal horns in a developmentally transient fashion in at least one or both sexes. Similar to species that retain their horns to adulthood, transient horns grow during late larval development and are clearly visible in pupae. However, unlike species that express horns as adults, transient horns are resorbed during pupal development. In a large number of species this mechanisms allows fully horned pupae to molt into entirely hornless adults. Consequently, far more Onthophagus species appear to possess the ability to develop pronotal horns than is indicated by their adult phenotypes. We use our data to expand a recent phylogeny of the genus Onthophagus to explore how the widespread existence of developmentally transient horns alters our understanding of the origin and dynamics of morphological innovation and diversification in this genus. We find that including transient horn development into the phylogeny dramatically reduces the number of independent origins required to explain extant diversity patters and suggest that pronotal horns may have originated only a few times, or possibly only once, during early Onthophagus evolution. We then propose a new and previously undescribed function for pronotal horns during immature development. We provide histological as well as experimental data that

  10. Karakterisering van de zuurgevoeligheid van Salmonella typhimurium faagtype DT104

    NARCIS (Netherlands)

    de Jonge R; van Leusden FM; Dufrenne JB; Ritmeester WS; Delfgou-van Asch EHM; van Pelt W; LBG

    1999-01-01

    Het aantal gevallen van salmonellosis in Nederland veroorzaakt door Salmonella typhimurium faagtype DT104 is toegenomen van 10 in 1985 tot 163 in 1997 (10% van alle gevallen van salmonellosis). De stam lijkt zijn oorsprong te hebben in het Verenigd Koninkrijk. Daar wordt inmiddels 20% van alle gev

  11. Fracturen van het distale deel van het femur

    NARCIS (Netherlands)

    Duyn, Cornelius Diederikus van

    1977-01-01

    ln dit proefschrift wordt een analyse gegeven van de behandeling en de daarmee bereikte resultaten van 123 patiënten die in de periode 1 januari 1958 tot en met 31 december 1972 wegens een fractuur van het distale deel van het femur werden behandeld in de Kliniek voor Heelkunde van het Academisch

  12. Factoren die van invloed zijn op enkele vruchtbaarheidskenmerken van zeugen.

    NARCIS (Netherlands)

    Klaver, J.; den Hartog, L.A.

    1989-01-01

    Gegevens van meerdere worpen van 358 zeugen Groot Yorkshire en Nederlands Landras zijn gebruikt om verbanden tussen produktiekenmerken te berekenen. Ingegaan wordt op de invloed van het voerniveau tijdens de zoogperiode en tijdens het interval van spenen tot dekken op diverse variabelen, die van bel

  13. Expats helpen elkaar : Analyse van participatie websites van expats

    NARCIS (Netherlands)

    Grimmelikhuijsen, S.G.; Werner, G.D.A.; Meijer, A.J.; Brandsma, G.J.

    2009-01-01

    Deze rapportage is het resultaat van het eerste onderdeel van het onderzoek van de USBO (Universiteit Utrecht) naar e-participatie van expats. In dit deelonderzoek is het aanbod van e-participatie initiatieven in kaart gebracht. In totaal zijn 139 websites geanalyseerd en beoordeeld op diverse crite

  14. A CUTANEOUS HORN MIMICKING POLYDACTYLY: A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Funda Tamer

    2015-04-01

    Full Text Available A cutaneous horn is a general name for cornified material protruding from skin. On the other hand, polydactyly is a common congenital anomaly of the hand and foot which is characterized by extra finger or toe. A cutaneous horn might mimick polydactyly by resembling an extra toe. Hereby, we present a 72-year-old white Caucasian male with an extra toe-like projection on his fourth toe. Initially, polydactyly was suspected, however a cutaneous horn was also considered. The lesion was surgically removed. The histopathological examination of the specimen revealed hyperkeratosis, and thus confirmed the  lesion to be a cutaneous horn

  15. Facial cutaneous horn and skin cancer: Report of two cases

    Directory of Open Access Journals (Sweden)

    Bilal Sula

    2010-05-01

    Full Text Available Cornu cutaneum horn is a lesion with hyperkeratosis resembling that of an animal horn and its length varies from a few millimeters to several centimeters. The horn is most commonly located in the face, ears and other sun exposed areas. Cornu cutaneum occurs in association with, or as a response to a wide variety of underlying benign, pre-malignant, and malignant cutaneous diseases. Two cases with facial cutaneous horn with underlying squamous cell carcinoma and basal cell carcinoma is reported.

  16. Intense selective hunting leads to artificial evolution in horn size.

    Science.gov (United States)

    Pigeon, Gabriel; Festa-Bianchet, Marco; Coltman, David W; Pelletier, Fanie

    2016-04-01

    The potential for selective harvests to induce rapid evolutionary change is an important question for conservation and evolutionary biology, with numerous biological, social and economic implications. We analyze 39 years of phenotypic data on horn size in bighorn sheep (Ovis canadensis) subject to intense trophy hunting for 23 years, after which harvests nearly ceased. Our analyses revealed a significant decline in genetic value for horn length of rams, consistent with an evolutionary response to artificial selection on this trait. The probability that the observed change in male horn length was due solely to drift is 9.9%. Female horn length and male horn base, traits genetically correlated to the trait under selection, showed weak declining trends. There was no temporal trend in genetic value for female horn base circumference, a trait not directly targeted by selective hunting and not genetically correlated with male horn length. The decline in genetic value for male horn length stopped, but was not reversed, when hunting pressure was drastically reduced. Our analysis provides support for the contention that selective hunting led to a reduction in horn length through evolutionary change. It also confirms that after artificial selection stops, recovery through natural selection is slow.

  17. Die etiek van Luther

    Directory of Open Access Journals (Sweden)

    J. H. van Wyk

    1983-06-01

    Full Text Available Dink ons aan die etiek van Luther dan spring onmiddellik ’n paar boeiende uitsprake van hom na vore soos o.a. dat Christene vanuit die gemeenskap met Christus nuwe dekaloë moet maak wat helderder as die van Moses kan wees, of dat ons in bepaalde sin vir ons naaste ’n Christus moet word. Die bydrae van Luther 'tot die Christelike etiek is sonder twyfel van groot betekenis en die bestudering daarvan die moeite werd. Luther is geprys as rewolusionêr en verguis as konserwatis, hy is geëer as iemand wat weer die ware be­tekenis van godsdiens ontdek het toe die lewe vervloei het in etiek. Of dit egter korrek is om sy etiek as konserwatief te tipeer, soos White doen, moet betwyfel word.

  18. Hugh E. Huxley: cambiando el paradigma de la contracción muscular, desde dentro. [Hugh E. Huxley: changing from inside the paradigm of muscle contraction].

    OpenAIRE

    Adolfo Araci

    2014-01-01

    Desde un punto de vista físico se puede entender la fibra muscular como un motor, es decir, un sistema capaz de transformar la energía química en energía mecánica, que se utiliza para realizar un trabajo. Por lo tanto, para entender cómo ocurre dicho proceso de transformación es necesario conocer la ultraestructura de la fibra muscular. Esta es, sin duda, la principal aportación al acervo científico del recientemente fallecido Hugh Emor Huxley (1924-2013). Huxley se graduó en Física en el Chr...

  19. Hugh E. Huxley: cambiando el paradigma de la contracción muscular, desde dentro. [Hugh E. Huxley: changing from inside the paradigm of muscle contraction].

    OpenAIRE

    Adolfo Araci

    2014-01-01

    Desde un punto de vista físico se puede entender la fibra muscular como un motor, es decir, un sistema capaz de transformar la energía química en energía mecánica, que se utiliza para realizar un trabajo. Por lo tanto, para entender cómo ocurre dicho proceso de transformación es necesario conocer la ultraestructura de la fibra muscular. Esta es, sin duda, la principal aportación al acervo científico del recientemente fallecido Hugh Emor Huxley (1924-2013). Huxley se graduó en Física en el Chr...

  20. Uitspoeling van zware metalen uit landbouwgronden; schatting van de bijdrage van uitspoeling uit landbouwgronden aan de belasting van het oppervlaktewater

    NARCIS (Netherlands)

    Römkens, P.F.A.M.; Groenenberg, J.E.; Bril, J.; Vries, de W.

    2002-01-01

    Uitspoeling van metalen vanuit de bodem naar grond- en oppervlaktewater is tot nu toe niet meegenomen bij de schattingen van de belasting van oppervlaktewater met metalen. Om te kunnen beoordelen of de bijdrage van uitspoeling wezenlijk bijdraagt aan de belasting van oppervlaktewater is een model on

  1. De auteursrechtelijke groeipijnen van Google

    NARCIS (Netherlands)

    Hugenholtz, P.B.

    2011-01-01

    Het succesverhaal van Google behoort tot de canon van de geschiedenis van onze informatiemaatschappij. In 1998 begonnen in een studentenkamer op de campus van Stanford University, groeide Google in enkele jaren uit tot het orakel van het internet. Zo werd ‘googelen’ de gebruikelijke term voor zoeken

  2. Gemelligraviditet i et horn af bicorn uterus

    DEFF Research Database (Denmark)

    Maagaard, Mathilde; Langhoff-Roos, Jens

    2009-01-01

    Bicornuate uterus is associated with early foetal loss and extremely preterm delivery. A patient with dichorionic twins in a single horn of a bicornuate uterus was admitted in week 24 + 6 with preterm labour. Long-term treatment with a combination of tocolytics, atosiban and diclofenac inhibited ...... labour until week 26 + 3 where both babies were born. Both babies are still alive. Longterm tocolytic treatment may be successful in specific cases, but there is no evidence for a general use of long-term tocolysis in preterm labour. Udgivelsesdato: 2009-Mar-9...

  3. Constraint Specialisation in Horn Clause Verification

    DEFF Research Database (Denmark)

    Kafle, Bishoksan; Gallagher, John Patrick

    2015-01-01

    We present a method for specialising the constraints in constrained Horn clauses with respect to a goal. We use abstract interpretation to compute a model of a query-answer transformation of a given set of clauses and a goal. The effect is to propagate the constraints from the goal top......-down and propagate answer constraints bottom-up. Our approach does not unfold the clauses at all; we use the constraints from the model to compute a specialised version of each clause in the program. The approach is independent of the abstract domain and the constraints theory underlying the clauses. Experimental...

  4. Teelt van knolvenkel

    NARCIS (Netherlands)

    Buishand, T.; Jonge, de P.

    1984-01-01

    Herziene teelthandleiding over plantkundige eigenschappen, grond, bemesting, ervaringen met rassen in Nederland, zaaien en planten, onkruidbestrijding, ziekten en plagen, oogst, bewaring, aflevering, voorbeelden van arbeidsbehoefte en saldoberekeningen

  5. Simon van der Meer in the AA Control Room

    CERN Multimedia

    CERN PhotoLab

    1984-01-01

    Simon van der Meer, spiritus rector of the Antiproton Accumulator, in the AA Control Room. Inventor of stochastic cooling, on which the AA was based, and of the magnetic horn, with which the antiprotons were focused, he also wrote most of the software with which the AA was controlled, and spent uncountable numbers of hours in this chair to tickle the AA to top performance. 8 months after this picture was taken, he received, in October 1984, the Nobel prize, together with Carlo Rubbia, the moving force behind the whole Proton-Antiproton Collider project that led to the discovery, in 1983, of the W and Z intermediate bosons.

  6. Invoering van algemene vaardigheden: mogelijkheden van een vakoverstijgende aanpak

    NARCIS (Netherlands)

    Leenders, F.J.

    2003-01-01

    Centrale vraag: Het onderzoek richtte zich op de implementatie van vakoverstijgend vaardighedenonderwijs in de Tweede Fase van het voortgezet onderwijs. Belangrijkste conclusies: De brochure bevat onder meer een beschrijving van vijf scholen waar op verschillende wijze vaardighedenonderwijs

  7. Ontwikkeling van de beverpopulaties in Nederland van 2000-2004

    NARCIS (Netherlands)

    Niewold, F.J.J.

    2004-01-01

    Dit rapport beschrijft de aantalsontwikkeling van de beverpopulaties in Nederland in de periode 2000-2004. Van twee populaties (Gelderse Poort en Flevoland) werden, mede met hulp van vrijwilligers, ook gegevens verzameld over voortplanting, sterfte, dispersie, bijplaatsingen, verstoringen, vraatscha

  8. Het beoordelen van de klinische competenties van studenten tandheelkunde

    NARCIS (Netherlands)

    Schoonheim-Klein, M.E.; van Selms, M.K.A.; Volgenant, C.M.C.; Wiegman, H.P.; Vervoorn, J.M.

    2012-01-01

    Studenten tandheelkunde worden tegenwoordig meer beoordeeld op de kwaliteit van hun verrichtingen (competentie) en minder op de kwantiteit. Om klinische competenties van studenten te toetsen kunnen in de preklinische fase van de opleiding objectieve gestructureerde toetsen, de zogeheten‘ bjective st

  9. Normering van meetnauwkeurigheden van klimaatmetingen in praktijkkassen : [eindrapport

    NARCIS (Netherlands)

    Berg, van den G.A.; Ruiter, de H.W.

    1998-01-01

    In het project 'Normering van meetnauwkeurigheden van klimaatmetingen in praktijkkassen' zijn eisen opgesteld waaraan meetsystemen voor de kasklimaatregeling in praktijkkassen, zowel uit technisch als uit teelttechnisch oogpunt, zouden moeten voldoen. Op basis van de geformuleerde eisen, is vervolge

  10. Normering van meetnauwkeurigheden van klimaatmetingen in praktijkkassen : [eindrapport

    NARCIS (Netherlands)

    Berg, van den G.A.; Ruiter, de H.W.

    1998-01-01

    In het project 'Normering van meetnauwkeurigheden van klimaatmetingen in praktijkkassen' zijn eisen opgesteld waaraan meetsystemen voor de kasklimaatregeling in praktijkkassen, zowel uit technisch als uit teelttechnisch oogpunt, zouden moeten voldoen. Op basis van de geformuleerde eisen, is vervolge

  11. Overzicht van de kostprijzen van enige tuinbouwproducten (prijspeil 1947)

    NARCIS (Netherlands)

    Koppert, C.

    1948-01-01

    In dit rapport wordt een overzicht gegeven van de kostprijsberekeningen van de voornaamste tuinbouwproducten, welke ontleend zijn aan de rapporten, die in 1947 door de Afd. Tuinbouw van het Landbouw-Economisch Instituut zijn uitgebracht.

  12. Karakterisering van het Etimologiewoordeboek van Afrikaans (EWA

    Directory of Open Access Journals (Sweden)

    Fons Moerdijk

    2011-10-01

    Full Text Available

    Samenvatting: Zesendertig jaar na Afrikaanse etimologieë van Boshoff en Nienaber verscheener in 2003 een nieuw etymologisch woordenboek van het Afrikaans: het Etimologiewoordeboek vanAfrikaans (EWA. Tussen die twee woordenboeken bestaat een wezenlijk verschil. Het werk vanBoshoff en Nienaber is vrijwel alleen toegankelijk voor specialisten en niet specifiek bedoeld vooreen breed publiek. EWA is juist allereerst bestemd voor de leek die zich interesseert voor de oorsprongen de geschiedenis van de eigen taal. Daarnaast biedt het ook de etymoloog en historischtaalkundige een hoop gegevens en inspiratie voor nader onderzoek. Als etymologisch woordenboekbezit EWA een aantal bijzondere, eigen kenmerken. De selectie van de woorden is bepaalddoor het beoogde gebruikerspubliek. Als gevolg daarvan bevat EWA verscheidene typen woordendie in traditionele etymologische woordenboeken doorgaans veronachtzaamd worden, zoals afleidingen,samenstellingen, neologismen en gemeenzame spreektaalwoorden. De artikelstructuurwordt gekenmerkt door een hoge graad van uniformiteit en consistentie. Het accent ligt op dezogenaamde etymologia proxima, de etymologie waarbij men één stap teruggaat en de meestdirecte herkomst van het woord biedt. Voorts is speciale aandacht besteed aan polysemie: nietalleen de herkomst van de dominante betekenis van een woord wordt gegeven, maar ook die vanzijn eventuele andere betekenis(sen. Benoemingsmotieven komen ook veelvuldig aan bod. In eeneventuele tweede druk zouden opvallende verschillen in vorm of betekenis altijd verklaard of inieder geval besproken moeten worden. Dat blijft nu nogal eens achterwege. Ook zou voorafgaandaan zo'n volgende editie meer onderzoek naar woordhistorisch materiaal uit primaire bronnenvoor met name de 17de–19de eeuw verricht moeten worden. Het zou mooi zijn als deze eersteuitgave van EWA de aanleiding tot een dergelijk onderzoek zou vormen.

    Sleutelwoorden: BENOEMINGSMOTIEF, ETYMOLOGIA PROXIMA

  13. Fitz-Hugh-Curtis syndrome: abdominal pain in women of 26 years old Síndrome de Fitz-Hugh-Curtis: dolor abdominal en mujer de 26 años

    OpenAIRE

    Liseth Rivero-Sánchez; Elsa María López-Soriano; Luisa Guarner-Aguilar

    2011-01-01

    Fitz-Hugh-Curtis syndrome is an inflammation of the liver capsule as a complication of pelvic inflammatory disease, whose most common etiologic agent is the C. trachomatis. The acute phase of the Fitz-Hugh-Curtis syndrome may present itself with pain in right upper abdomen, commonly confused with other hepatobiliary and gastrointestinal tract diseases. Definitive diagnosis is now possible with non-invasive techniques such as ultrasound, computed tomography, as well as techniques to isolate th...

  14. Ontwikkeling van een vloeistofchromatografische methode voor de bepaling van residuen van meticlorpindol in pluimveevlees

    NARCIS (Netherlands)

    Beek, W.M.J.; Keukens, H.J.

    1994-01-01

    In dit rapport wordt de ontwikkeling van een methode beschreven voor de bepaling van residuen van meticlorpindol in pluimveevlees met behulp van HPLC en UV-detectie. Er is onderzoek verricht naar de chromatografische scheiding van meticlorpindol op reversed phase kolommen, naar een geschikte extract

  15. Het Geluid van Nederland. De rol van communicatie bij het crowdsourcen van geluid bij online gemeenschappen

    NARCIS (Netherlands)

    A. van der Meulen (Anna)

    2014-01-01

    textabstractHet doel van dit onderzoek is om aanbevelingen te doen op het gebied van communicatie aan de afdeling Research & Development van het Nederlands Instituut voor Beeld en Geluid over de rol van crowdsourcing en online gemeenschappen bij het aanvullen, openstellen en up-to-date houden van he

  16. Ontwikkeling van een vloeistofchromatografische methode voor de bepaling van residuen van meticlorpindol in pluimveevlees

    NARCIS (Netherlands)

    Beek, W.M.J.; Keukens, H.J.

    1994-01-01

    In dit rapport wordt de ontwikkeling van een methode beschreven voor de bepaling van residuen van meticlorpindol in pluimveevlees met behulp van HPLC en UV-detectie. Er is onderzoek verricht naar de chromatografische scheiding van meticlorpindol op reversed phase kolommen, naar een geschikte extract

  17. Numerical bifurcation analysis of two coupled FitzHugh-Nagumo oscillators

    CERN Document Server

    Hoff, Anderson; Manchein, Cesar; Albuquerque, Holokx A

    2015-01-01

    The behavior of neurons can be modeled by the FitzHugh-Nagumo oscillator model, consisting of two nonlinear differential equations, which simulates the behavior of nerve impulse conduction through the neuronal membrane. In this work, we numerically study the dynamical behavior of two coupled FitzHugh-Nagumo oscillators. We consider unidirectional and bidirectional couplings, for which Lyapunov and isoperiodic diagrams were constructed calculating the Lyapunov exponents and the number of the local maxima of a variable in one period interval of the time-series, respectively. By numerical continuation method the bifurcation curves are also obtained for both couplings. The dynamics of the networks here investigated are presented in terms of the variation between the coupling strength of the oscillators and other parameters of the system. For the network of two oscillators unidirectionally coupled, the results show the existence of Arnold tongues, self-organized sequentially in a branch of a Stern-Brocot tree and ...

  18. The fusion of the imagination and the material universe: Hugh Hood, Flying a red kite (1962

    Directory of Open Access Journals (Sweden)

    Aleksander Kustec

    1999-12-01

    Full Text Available In the first weeks of January 1957 Hugh (John Blagdon Hood moved to Hartford, Connecticut, U. S. A, where he became Professor at Saint Joseph College. At the time Hood did not know that he was going to become one of Canada's greatest stylists and contemporary short story writers. Between January 1957 and March 1962, when he was going through a final selection o short stories for his first book, Flying a Red Kite (FRK, Hugh Hood wrote thirty-eight short stories and two novels (God Rest You Merry and Hungry Generations. The numbers show that Hood was an extremely productive writer in that period. From the thirty-eight stories he chose eleven for FRK, fourteen of them were published in subsequent collections, in various journals and short story anthologies, while thirteen of them have not been published yet.

  19. The 2016 Hughes Lecture: What's new in maternal morbidity and mortality?

    Science.gov (United States)

    Arendt, K W

    2016-05-01

    Each year, the Board of Directors of the Society for Obstetric Anesthesia and Perinatology selects an individual to review a given year's published obstetric anesthesiology literature. This individual then produces a syllabus of the year's most influential publications, delivers the Ostheimer Lecture at the Society's annual meeting, the Hughes Lecture at the following year's Sol Shnider meeting, and writes corresponding review articles. This 2016 Hughes Lecture review article focuses specifically on the 2014 publications that relate to maternal morbidity and mortality. It begins by discussing the 2014 research that was published on severe maternal morbidity and maternal mortality in developed countries. This is followed by a discussion of specific coexisting diseases and specific causes of severe maternal mortality. The review ends with a discussion of worldwide maternal mortality and the 2014 publications that examined the successes and the shortfalls in the work to make childbirth safe for women throughout the entire world.

  20. Planar rotary motor using ultrasonic horns

    Science.gov (United States)

    Sherrit, Stewart; Bao, Xiaoqi; Badescu, Mircea; Chang, Zensheu; Geiyer, Daniel; Allen, Phillip; Ostlund, Patrick; Bar-Cohen, Yoseph

    2011-04-01

    One of the first piezoelectric motor designs with significant rotational speeds was outlined by Barth. This device used extensional piezoelectric elements to produce a time varying force at a distance r from the center of a centrally supported disk. These extensional actuators produced micro-steps at a high frequency with the end result being macroscopic rotation of the disk and high torque. The rotation direction is controlled by the choice of the actuators and the direction of the extension about the rotor center. A recent advancement in producing pre-stressed power ultrasonic horns using flexures allows for the development of high torque ultrasonic motors based on the Barth's idea that can be fabricated in a 2D plate or in more complicated 3D structures. In addition to the pre-stress flexures the design also allows for the use of flexures to produce the rotor/horn normal force. The torque can be controlled by the number of actuators in the plane and the amplitude of the normal force. This paper will present analytical and experimental results obtained from testing prototype planar motors.

  1. Diagnostic findings in 132 great horned owls

    Science.gov (United States)

    Franson, J.C.; Little, S.E.

    1996-01-01

    We reviewed diagnostic findings for 132 great horned owl (Bubo virginianus) carcasses that were submitted to the National Wildlife Health Center from 1975-93. The carcasses were collected in 24 states but most came from Colorado (N = 21), Missouri (N = 12), Oregon (N = 12), Wyoming (N = 11), Illinois (N = 10), and Wisconsin (N = 9). Forty-two birds were emaciated but presumptive causes of emaciation, including old injuries, chronic lesions in various organs, and exposure to dieldrin, were found in only 16. A greater proportion of juveniles (56%) than adults (29%) were emaciated. Twelve owls were shot and 35 died from other traumatic injuries. Poisonings were diagnosed in 11 birds, including five associated with hydrogen sulfide exposure in oil fields and six cases of agricultural pesticide poisonings. Electrocution killed nine birds and infectious diseases were found in six. Miscellaneous conditions, including egg impaction, drowning, and visceral gout were diagnosed in three of the birds and the cause of death was undetermined in 14 owls. While this review identifies major diagnostic findings in great horned owls, sample bias prevents definitive conclusions regarding actual proportional causes of mortality.

  2. Onderzaai van klaver in peen

    NARCIS (Netherlands)

    Schelling, G.; Theunissen, J.

    2000-01-01

    In vier achtereenvolgende jaren (1995 - 1998) is door Plant Research International een proef gedaan met onderzaai van ondergrondse klaver (Trifolium subterraneum) in een vlakveldse teelt van wortelen. De effecten van onderzaai op percentage marktbare wortelen, aantasting door wortelvlieg (Psila rosa

  3. Pherobank: gecontroleerde afgifte van lokstoffen

    NARCIS (Netherlands)

    Stol, W.; Griepink, F.C.

    2007-01-01

    Achtergrond. Synthetische signaalstoffen (feromonen) worden wereldwijd toegepast voor de signalering en bestrijding van plaaginsecten in geïntegreerde bestrijdingsmethoden (Integrated Pest Management). Door de omschakeling van primaire producenten van de gangbare naar geïntegreerde- en biologische p

  4. Cytotoxiciteitsanalyse van glans/ontspanningsmiddelen

    NARCIS (Netherlands)

    Geffen MF van; Orzechowski TJH; Machielsen JCA; Asten JAAM van; LGM

    1994-01-01

    Twee cytotoxiciteitstesten, gevalideerd voor de bepaling van de biocompatibiliteit van medische hulpmiddel extracten, zijn toegepast op glans/ontspanningsmiddelen. Glans/ontspanningsmiddelen ("instrumenten-melk") worden gebruikt bij de laatste processtap voor het reinigen van chirurgis

  5. Dialyse van citraatbloed voor transfusie

    NARCIS (Netherlands)

    Huizinga, Tekke

    1957-01-01

    Na 1943 is een aantal publikaties verschenen, waarin melding wordt gemaakt van citraatintoxicaties tengevolge van snelle transfusies van grote hoeveelheden citraatbloed. Deze publikaties zijn uitganspunt geweest voor een aantal dierproeven, waarin de klinische ervaringen experimenteel werden

  6. Two-frequency self-oscillations in a FitzHugh-Nagumo neural network

    Science.gov (United States)

    Glyzin, S. D.; Kolesov, A. Yu.; Rozov, N. Kh.

    2017-01-01

    A new mathematical model of a one-dimensional array of FitzHugh-Nagumo neurons with resistive-inductive coupling between neighboring elements is proposed. The model relies on a chain of diffusively coupled three-dimensional systems of ordinary differential equations. It is shown that any finite number of coexisting stable invariant two-dimensional tori can be obtained in this chain by suitably increasing the number of its elements.

  7. Selected results from LLNL-Hughes RAR for West Coast Scotland Experiment 1991

    Energy Technology Data Exchange (ETDEWEB)

    Lehman, S K; Johnston, B; Twogood, R; Wieting, M; Yorkey, T; Robey, H [Lawrence Livermore National Lab., CA (United States); Whelan, D; Nagele, R [Hughes Aircraft Co., Los Angeles, CA (United States)

    1993-01-05

    The joint US -- UK 1991 West Coast Scotland Experiment (WCSEX) was held in two locations. From July 5 to 12, 1991, in Upper Loch Linnhe, and from July 18 to July 26, 1991, in the Sound of Sleat. The LLNL-Hughes team fielded a fully polarimetric X-band hill-side real aperture radar to collect internal wave wake data. We present here a sample data set of the best radar runs.

  8. Symmetric bursting behaviors in the generalized FitzHugh-Nagumo model.

    Science.gov (United States)

    Abbasian, A H; Fallah, H; Razvan, M R

    2013-08-01

    In the current paper, we have investigated the generalized FitzHugh-Nagumo model. We have shown that symmetric bursting behaviors of different types could be observed in this model with an appropriate recovery term. A modified version of this system is used to construct bursting activities. Furthermore, we have shown some numerical examples of delayed Hopf bifurcation and canard phenomenon in the symmetric bursting of super-Hopf/homoclinic type near its super-Hopf and homoclinic bifurcations, respectively.

  9. Young CAS biologist gets five-year grant from Howard Hughes Medical Institute

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    Dr. TANG Chun, an outstanding young biologist from the CAS Wuhan Institute of Physics and Mathematics (WIPM) was announced in January 2012 to have won the first International Early Career Award from Howard Hughes Medical Institute with a five-year grant totaling up to 650,000 US dollars. Dr. Tang is an expert in using novel nuclear magnetic resonance methods to study the behavior and function of proteins,

  10. 耦合的Fitz-Hugh-Nagumo模型的初边值问题

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    首先研究了具有耦合的 Fitz-Hugh-Nagumo 模型初值问题的渐近性. 其次,所对应的平衡态方程解的基本性态也将被讨论. 最后, 该模型的初边值问题古典解的最大吸引子的存在性将首次被证明.

  11. The Hughes Court and Radical Dissent: The Case of Dirk De Jonge and Angelo Herndon

    OpenAIRE

    Tushnet, Mark V.

    2012-01-01

    Scattered Supreme Court decisions in the early twentieth century dealt with the Constitution’s protection of freedom of speech. Radical dissent over United States participation in World War I and the nation’s intervention against the Bolshevik revolution in Russia led the Court to its first sustained engagement with free speech cases. By the time Chief Justice Hughes took the center chair, the national government largely had abandoned its pursuit of radical dissenters, some of whom played la...

  12. Percutaneous transhepatic venous embolization of pulmonary artery aneurysm in Hughes-Stovin syndrome

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Kyung Ah; Kim, Man Deuk; Oh, Do Yun; Park, Pil Won [Bundang CHA General Hospital, Pochon CHA University, Seongnam (Korea, Republic of)

    2007-08-15

    Hughes-Stovin syndrome is an extremely rare entity. We present a case of a 42-year-old man, who developed deep vein and inferior vena cava (IVC) thrombosis, repeated internal bleeding and pulmonary artery aneurysms (PAAs). The patient presented with massive hemoptysis and with PAAs of a 2.5 cm maximum diameter. We describe the successful percutaneous transhepatic venous embolization of the PAAs due to occluded common vascular pathways to the pulmonary artery.

  13. Bioprospecting for podophyllotoxin in the Big Horn Mountains, Wyoming

    Science.gov (United States)

    The objective of this study was to evaluate variations in podophyllotoxin concentrations in Juniperus species found in the Big Horn Mountains in Wyoming. It was found that Juniperus species in the Big Horn Mountains included three species; J. communis L. (common juniper), J. horizontalis Moench. (c...

  14. Cryptographic protocol verification using tractable classes of horn clauses

    DEFF Research Database (Denmark)

    Seidl, Helmut; Neeraj Verma, Kumar

    2007-01-01

    We consider secrecy problems for cryptographic protocols modeled using Horn clauses and present general classes of Horn clauses which can be efficiently decided. Besides simplifying the methods for the class of flat and onevariable clauses introduced for modeling of protocols with single blind...

  15. Idiopathic prolapse of 1 uterine horn in a yearling filly

    Science.gov (United States)

    2004-01-01

    Abstract A yearling filly was presented for protrusion of a mass at the vulvar margins. A diagnosis of prolapse of the right uterine horn was made after vaginoscopy, transrectal palpation, and ultrasonography. It was confirmed later by biopsy of the tissue. Recovery was uneventful after easy replacement of the uterine horn. PMID:15317392

  16. A política de Hugh Dalton e o Bloqueio Económico (1940-1942)

    OpenAIRE

    Mariana Castro

    2015-01-01

    The World War II was a scenery of conflict and protagonists. Hugh Dalton was Minister of Economics of War between 1940 and 1942 in England. Highlighted by the measure in economic blockade the belligerents and neutral countries, proposing the control of smuggling through the prohibition of exports and imports with the German enemy, in other words ‘dry internally and externally “to weaken. This essay focuses on Hugh Dalton policy, leaving few clues and suggestions for further study ...

  17. Voorkom insleep van ziekten

    NARCIS (Netherlands)

    Groenen, J.A.J.Th.

    1990-01-01

    De insleep en verspreiding van ziektekiemen kan een pluimveebedrijf grote schade opleveren. Er dient dan ook alles aan gedaan te worden om dit te voorkomen. Een goede hygiëne is daarbij een eerste vereiste. Daartoe behoort ook de grondige reiniging enontsmetting van een stal nadat een koppel dieren

  18. Economie van energiegewassen

    NARCIS (Netherlands)

    Voort, van der M.P.J.

    2008-01-01

    Bio-energie staat sterk in de belangstelling. De wens naar een meer duurzame energievoorziening is hierbij een belangrijke drijfveer. Ook vanuit de akkerbouw is er interesse in het telen van gewassen voor de productie van energie. Belangrijke vraag bij de afweging om energiegewassen te gaan telen, i

  19. Praktijkevaluatie van 'piglet snatching'

    NARCIS (Netherlands)

    Smits, J.M.; Binnendijk, G.P.; Eijck, I.A.J.M.

    2002-01-01

    Bij piglet snatching worden biggen van een zeug direct bij de geboorte weggevangen en overgelegd naar een zeug op een ander bedrijf. In de praktijk is dit een goede, welzijnsvriendelijke manier om biggen van een bedrijf met een lage ziektevrij-status maar met een hoge genetische waarde over te breng

  20. Erosie van rivieroevers

    NARCIS (Netherlands)

    Mosselman, E.

    1987-01-01

    Oevers staan sinds kart in het middelpunt van de belangstellingbij beheerders van oppervlaktewateren in Nederland. Niet langerbeschouwt men oevers slechts als randverschijnsel, maar alsobjecten met een duidelijk eigen plaats en functie.Het streven om te komen tot een integraal waterbeleid

  1. Jaap van Praag

    NARCIS (Netherlands)

    Gasenbeek, A.

    2007-01-01

    PRAAG, JAAP VAN (1911-1981), Dutch organizer and theoretician of organized HUMANISM. Jaap van Praag was born on May 11, 1911, in Amsterdam. He grew up in a secular Jewish and socialist family. Mainly through his mother and by much reading he acquired considerable knowledge of the Bible. He studied D

  2. Dialectiek van de verlichting

    NARCIS (Netherlands)

    Hoogland, Jan

    2006-01-01

    Vooral door het boek Dialektik der Aufklärung van Horkheimer en Adorno heeft het bewustzijn zich doorgezet dat een ten opzichte van zichzelf onkritische verlichting haar eigen tegenkrachten oproept. In deze bijdrage wordt op dit fenomeen nader ingegaan, in het bijzonder met het oog op een dogmatisch

  3. Kroniek van het mededingingsrecht

    NARCIS (Netherlands)

    Wesseling, R.; Truijens Martinez, J.

    2015-01-01

    Waar liggen de grenzen van het bereik van het mededingingsrecht? Die vraag komt steeds vaker op. Buiten het mededingingsrecht heeft de Europese Commissie beperkte handhavingsbevoegdheden. Voor de Commissie is een probleem dus al snel een mededingingsrechtelijke kwestie. De Libor-affaire en

  4. Keuzeprocessen van Consumenten

    NARCIS (Netherlands)

    B. Wierenga (Berend)

    1987-01-01

    textabstractVoor de aanbieder van een voedingsmiddel, of dit nu een merkprodukt a la Mona is of een 'commodity', bijvoorbeeld karnemelk, is het van groot belang te weten welke factoren bepalen of een consument het betreffende produkt zal kiezen dan wel voor een concurrerend alternatief zal opteren.

  5. De teelt van walnoten

    NARCIS (Netherlands)

    Wertheim, S.J.

    1981-01-01

    De laatste jaren is er weer een toenemende belangstelling voor walnoten te constateren. Deze interesse komt in een enkel geval van een grondeigenaar die met noteteelt zijn grond rendabel wil maken. Meestal gaat het echter om de beplanting van erven, overhoeken, wegbermen en dijken. Vanwege deze bela

  6. Van buitenaf - Innovatie

    NARCIS (Netherlands)

    Mol, Erik; Heus, Ronald; Visser, Thomas

    2008-01-01

    Het optreden van de brandweer moet meeveranderen met snelle ontwikkelingen in de maatschappij en de mogelijkheden van de informatie- en communicatietechnologie (ICT). Dat stellen onderzoekers Eric Mol, Ronald Heus en Thomas Visser. Zij zijn verbonden aan TNO Defensie en Veiligheid en het First Respo

  7. Leefbaarheid van landen

    NARCIS (Netherlands)

    R. Veenhoven (Ruut)

    1996-01-01

    textabstractSAMENVATTING Leefbaarheid van landen wordt meestal beoordeeld aan het aanbod van zaken waarvan men denkt dat ze goed zijn voor mensen, zoals welvaart, werkgelegenheid, opleiding en gezondheidszorg. Dat aanbod wordt dan gemeten met puntenstelsels. Een voorbeeld daarvan is de Human Develop

  8. Weidegang van geiten

    NARCIS (Netherlands)

    Eekeren, van N.J.M.

    2011-01-01

    Weidegang is belangrijk voor het welzijn van geiten. Daarmee is het een essentieel onderdeel van de bedrijfsvoering en bovendien onderscheidend voor de biologische geitenhouderij. Helaas levert weidegang bij geiten ook een aantal knelpunten op zoals: het risico op een maagdarmwormenbesmetting, ruimt

  9. Grondbeginselen van de methode

    NARCIS (Netherlands)

    Pestalozzi, Johann Heinrich

    1995-01-01

    In opvoeding en onderwijs gaat het volgens Pestalozzi om de ontwikkeling van hoofd, hart en handen (‘Pädagogik des Kopfes, des Herzens und der Hand’). Het beste geschiedt dat door middel van de ‘natuurlijke opvoeding’. Hij noemde dit zijn ‘methode’.

  10. Sociale vergelijking van salarissen.

    NARCIS (Netherlands)

    Grumbkow, Jasper von

    1980-01-01

    Het onderwerp van het onderzoeksverslag is de nieuwsgierigheid van mensen naar salarisgegevens. Centraal in deze studie staat de sociale vergelijkingstheorie (Festinger, 1954) op grond waarvan aangenomen wordt dat mensen twee doelen op het oog hebben wanneer ze hun aandacht richten op salarisgegeven

  11. Kroniek van het mededingingsrecht

    NARCIS (Netherlands)

    Wesseling, R.; Truijens Martinez, J.

    2015-01-01

    Waar liggen de grenzen van het bereik van het mededingingsrecht? Die vraag komt steeds vaker op. Buiten het mededingingsrecht heeft de Europese Commissie beperkte handhavingsbevoegdheden. Voor de Commissie is een probleem dus al snel een mededingingsrechtelijke kwestie. De Libor-affaire en vergelijk

  12. Probe impedance measurements for millimeter-wave integrated horn antennas

    Science.gov (United States)

    Guo, Yong; Chiao, Jung-Chih; Potter, Kent A.; Rutledge, David B.

    1993-01-01

    In order to achieve an impedance-matched millimeter-wave integrated horn antenna mixer array, the characteristics of the antenna probes inside the horn must be known. This paper describes impedance measurements for various probes in low-frequency model horns of two different types: (1) a 3 x 3 array made of aluminum by electric discharge machining and (2) a half horn made of copper sheet placed on a big copper-clad circuit board that was used as an image plane. The results of measurements indicate that the presence of the horn increases the effective length of the probe element, in agreement with reports of Guo et al. (1991) and theoretical analysis of Eleftheriades et al. (1991). It was also found that the resonant frequencies can be controlled by changing the length of the probes or by loading the probes.

  13. A rat uterine horn model of genital tract wound healing.

    Science.gov (United States)

    Schlaff, W D; Cooley, B C; Shen, W; Gittlesohn, A M; Rock, J A

    1987-11-01

    A rat uterine horn model of genital tract wound healing is described. Healing was reflected by acquisition of strength and elasticity, measured by burst strength (BS) and extensibility (EX), respectively. A tensiometer (Instron Corp., Canton, MA) was used to assess these characteristics in castrated and estrogen-supplemented or nonsupplemented animals. While the horn weights (HW), BS, and EX of contralateral horns were not significantly different, the intra-animal variation of HW was 7.2%, BS was 17.7% and EX was 38.2%. In a second experiment, one uterine horn was divided and anastomosed, and the animal given estrogen supplementation or a placebo pellet. Estrogen administration was found to increase BS and EX of anastomosed horns prior to 14 days, but had no beneficial effect at 21 or 42 days. The data suggest that estrogen may be required for optimal early healing of genital tract wounds.

  14. Giant cutaneous horn in an African woman: a case report

    Directory of Open Access Journals (Sweden)

    Nthumba Peter M

    2007-12-01

    Full Text Available Abstract Introduction A cutaneous horn is a conical projection of hyperkeratotic epidermis. Though grossly resembling an animal horn, it lacks a bony core. These lesions have been well described in Caucasian patients, as well as in a number of Arabic and Asian patients. Case presentation A young female presented with a large 'horn' of five-year duration, arising from a burn scar. Excision and scalp reconstruction were performed. Histology was reported as verrucoid epidermal hyperplasia with cutaneous horn. Conclusion This may be the first documentation of this lesion in a black African. Although likely rare, it should be considered in the differential diagnosis of dermatologic lesions. Up to 40% of cutaneous horns occur as part of a premalignant or malignant lesion, and surgical extirpation with histological examination is thus more important than the curiosity surrounding these lesions.

  15. Functional genomics of the horn fly, Haematobia irritans (Linnaeus, 1758

    Directory of Open Access Journals (Sweden)

    Quiroz-Romero Héctor

    2011-02-01

    Full Text Available Abstract Background The horn fly, Haematobia irritans (Linnaeus, 1758 (Diptera: Muscidae is one of the most important ectoparasites of pastured cattle. Horn flies infestations reduce cattle weight gain and milk production. Additionally, horn flies are mechanical vectors of different pathogens that cause disease in cattle. The aim of this study was to conduct a functional genomics study in female horn flies using Expressed Sequence Tags (EST analysis and RNA interference (RNAi. Results A cDNA library was made from whole abdominal tissues collected from partially fed adult female horn flies. High quality horn fly ESTs (2,160 were sequenced and assembled into 992 unigenes (178 contigs and 814 singlets representing molecular functions such as serine proteases, cell metabolism, mitochondrial function, transcription and translation, transport, chromatin structure, vitellogenesis, cytoskeleton, DNA replication, cell response to stress and infection, cell proliferation and cell-cell interactions, intracellular trafficking and secretion, and development. Functional analyses were conducted using RNAi for the first time in horn flies. Gene knockdown by RNAi resulted in higher horn fly mortality (protease inhibitor functional group, reduced oviposition (vitellogenin, ferritin and vATPase groups or both (immune response and 5'-NUC groups when compared to controls. Silencing of ubiquitination ESTs did not affect horn fly mortality and ovisposition while gene knockdown in the ferritin and vATPse functional groups reduced mortality when compared to controls. Conclusions These results advanced the molecular characterization of this important ectoparasite and suggested candidate protective antigens for the development of vaccines for the control of horn fly infestations.

  16. Proeven van tekstkritiek. Een onderzoek betreffende de tekstgeschiedenis van de Renout van Montalbaen en de Perceval

    NARCIS (Netherlands)

    Hogenhout-Mulder, Maaike Janna

    1984-01-01

    In dit proefschrift wordt een poging gedaan de tekstgeschiedenis te achterhalen van twee Middelnederlandse tekstfragmenten: een gedeelte uit de RENOUT VAN MONTALBAEN en een gedeelte uit de PERCEVAL. ... Zie: Twee tekstfragmenten als object van onderzoek

  17. Spectrum van huidinfecties : Van schandvlek tot zorg

    NARCIS (Netherlands)

    Vries, de Henry

    2011-01-01

    Of het nu expats, massatoeristen of militairen op vredesmissie in Afghanistan betreffen, wij stellen ons bewust of onbewust bloot aan exotische ziekteverwekkers. De geschiedenis leert dat migratie de mens eigen is en de oorzaak is geweest van dodelijke epidemieën met talloze slachtoffers. Ook vandaa

  18. Groen van toen: van buitenplaats tot schooltuin

    NARCIS (Netherlands)

    Oldenburger-Ebbers, C.S.; Karssen, J.

    2012-01-01

    Grote technische ontwikkelingen en toenemende welvaart hebben in de loop der eeuwen de natuur dichter bij de mens gebracht. In deze tentoonstelling staat de gebruiker van het door de mens geschapen groen centraal. Rond drie thema’s: particulier groen, wandelen in openbaar groen en wonen in het groen

  19. Hogere verwachtingen van technologie dan van elkaar?

    NARCIS (Netherlands)

    Stijn Verhagen

    2012-01-01

    Boekbespeking van Sherrie Turkle, 2011, Alone Together: Why We Expect More from Technology and Less from Each Other. New York: Basic Books. Mails, sms’jes, instant messages, tweets, Skype, voicemails, Facebookberichten – via smartphones en andere apparaten zijn we vrijwel non-stop in contact met

  20. Groen van toen: van buitenplaats tot schooltuin

    NARCIS (Netherlands)

    Oldenburger-Ebbers, C.S.; Karssen, J.

    2012-01-01

    Grote technische ontwikkelingen en toenemende welvaart hebben in de loop der eeuwen de natuur dichter bij de mens gebracht. In deze tentoonstelling staat de gebruiker van het door de mens geschapen groen centraal. Rond drie thema’s: particulier groen, wandelen in openbaar groen en wonen in het groen

  1. Hogere verwachtingen van technologie dan van elkaar?

    NARCIS (Netherlands)

    Verhagen, Stijn

    2012-01-01

    Boekbespeking van Sherrie Turkle, 2011, Alone Together: Why We Expect More from Technology and Less from Each Other. New York: Basic Books. Mails, sms’jes, instant messages, tweets, Skype, voicemails, Facebookberichten – via smartphones en andere apparaten zijn we vrijwel non-stop in contact met vri

  2. Lichtdoorlatendheid van kasdekken onder verschillende omstsndigheden

    NARCIS (Netherlands)

    Bot, G.P.A.

    1984-01-01

    Aandacht voor lichtonderschepping; bewolkingsgraad; direkte straling; diffuse straling en gevolgen van veranderingen in kaskonstruktie of materiaaleigenschappen ten aanzien van de lichtdoorlatendheid. Bij vergelijking van de lichttransmissie van diverse kasdekken dient te worden uitgegaan van standa

  3. Afvangen van fosfaat uit bloembollensector met ijzerzand

    NARCIS (Netherlands)

    Chardon, W.J.; Groenenberg, J.E.; Jansen, S.; Buijert, A.; Talens, R.; Krol, A.F.

    2014-01-01

    In het oppervlaktewater van de Bollenstreek is de fosfaatconcentratie veel hoger dan de norm van de Europese Kaderrichtlijn Water. Met ijzerzand, een nevenproduct van drinkwaterproductie, kan fosfaat worden afgevangen. Het hoogheemraadschap van Rijnland heeft drie maatregelen op basis van ijzerzand

  4. Tijdreeksanalyse van de meetgegevens van het Landelijk Meetnet Regenwatersamenstelling

    NARCIS (Netherlands)

    Kempen GT; Buishand TA; Reijnders HFR; Frantzen AJ; van den Eshof AJ

    1986-01-01

    De tijdsafhankelijke variaties in de maandelijkse gemiddelde concentraties en deposities in de periode van 1978 t/m 1984 van stoffen in regenwater, verzameld in een meetnet van twaalf stations, zijn beschreven a.d.h. van een multipele regressie model. Vooral is aandacht besteed aan de

  5. Vliegende start : de eerste 'echte' onderwijsbaan van Lesley van Scherpenseel

    NARCIS (Netherlands)

    Snoek, Marco; Hallink, Hanneke; Scherpenseel, van Lesley

    2015-01-01

    Dit interview is het tweede in een serie van drie interviews en geeft een kijkje in de keuken van een startende leerkracht in een van de tekortvakken. We speken met Lesley van Scherpenseel, docent Natuurkunde en TOA op het Metis Montessori Lyceum

  6. On the origin of Ammon's horn.

    Science.gov (United States)

    Iniesta, I

    2014-10-01

    Greek and Roman worship of their gods and myths go back to Ancient Egyptian times. Images engraved in Greco-Roman coinage range from references to the assassination of Caesar and legendary stories like the arrival of a snake shaped demi-god Aesculapius to save the Romans from the plague, to invocations of major deities including Apollo the physician or Ammon the protector. Depicted with the horns of a ram, Ammon was adopted by the Greeks as an epithet of Zeus and later incorporated by the Romans as Jupiter. References to the cult of Ammon appear on tetradrachms minted for Alexander The Great and on provincial Roman coins struck under Claudius. It is thrilling to hold a coin depicting Marcus Aurelius with Salus on the reverse and think that it could have been handed to Galen in payment for his services. However, it is rare to find figures other than rulers on coins and the physician of Pergamum is no exception. Inspired by the Renaissance school of Padua, French anatomists in the Enlightenment (Garengeot in 1742 and Flurant in 1752) continued reviving ancient myths and named the curve-shaped-inner portion of the temporal lobe Ammon's horn. Outstanding scholars who studied this primitive structure of the brain included Lorente de Nó and his mentor Cajal, whose portrait appeared on fifty-pesetas notes issued in 1935. As primary sources of great archaeological and artistic value, Greco-Roman coins provide information about the origins of the myths and gods of classical antiquity and continue to inspire the arts and sciences to this day. Copyright © 2011 Sociedad Española de Neurología. Published by Elsevier Espana. All rights reserved.

  7. EST and microarray analysis of horn development in Onthophagus beetles

    Directory of Open Access Journals (Sweden)

    Tang Zuojian

    2009-10-01

    Full Text Available Abstract Background The origin of novel traits and their subsequent diversification represent central themes in evo-devo and evolutionary ecology. Here we explore the genetic and genomic basis of a class of traits that is both novel and highly diverse, in a group of organisms that is ecologically complex and experimentally tractable: horned beetles. Results We developed two high quality, normalized cDNA libraries for larval and pupal Onthophagus taurus and sequenced 3,488 ESTs that assembled into 451 contigs and 2,330 singletons. We present the annotation and a comparative analysis of the conservation of the sequences. Microarrays developed from the combined libraries were then used to contrast the transcriptome of developing primordia of head horns, prothoracic horns, and legs. Our experiments identify a first comprehensive list of candidate genes for the evolution and diversification of beetle horns. We find that developing horns and legs show many similarities as well as important differences in their transcription profiles, suggesting that the origin of horns was mediated partly, but not entirely, by the recruitment of genes involved in the formation of more traditional appendages such as legs. Furthermore, we find that horns developing from the head and prothorax differ in their transcription profiles to a degree that suggests that head and prothoracic horns are not serial homologs, but instead may have evolved independently from each other. Conclusion We have laid the foundation for a systematic analysis of the genetic basis of horned beetle development and diversification with the potential to contribute significantly to several major frontiers in evolutionary developmental biology.

  8. Microbewerking met behulp van lasers

    NARCIS (Netherlands)

    Ezendam, M.M.M.

    1994-01-01

    Het bewerken van materialen met behulp van lasers staat momenteel enorm in de belangstelling, en terecht. De ontwikkeling van bestaande en nieuwe typen lasers staat alles behalve stil. Ontwikkelingen bevinden zich met name in het gebied van hogere vermogens, betere bundelkwaliteit en hogere

  9. Perspectief van lupine voor zaadwinning

    NARCIS (Netherlands)

    Schroeder, J.

    1987-01-01

    In 1985 en 1986 heeft een orienterend ondezoek plaatsgevonden naar de opbrengstmogelijkheden van witte lupine op zandgrond. Opbrengst en afrijping van de diverse onderzochte rassen bleven in beide jaren achter bij die van erwten en veldbonen. Dit was vooral in 1985 mede een gevolg van de slechte

  10. Een korte geschiedenis van filmgeluid

    NARCIS (Netherlands)

    Aalbers, Jasper

    2015-01-01

    abstractDe Franse filmtheoreticus Christian Metz stelde in 1973 dat film betekenis geeft door middel van vier kanalen. Drie van die kanalen betreffen geluid. Dit erkende belang van filmgeluid roept de verwachting op dat filmwetenschappers een aanzienlijk deel van hun aandacht zullen richten op het a

  11. Burnout : de stand van zaken

    NARCIS (Netherlands)

    Taris, T.; Houtman, I.L.D.; Schaufeli, W.

    2013-01-01

    Dit artikel geeft een overzicht van de stand van zaken in het onderzoek naar burnout. Burnout is een syndroom van extreme vermoeidheid (uitputting), afstand nemen van het werk (distantie) en weinig vertrouwen in het eigen kunnen (verminderde competentie), waarbij de oorzaken voor deze aspecten geleg

  12. Nieuwe mosdiertjes van noordzeewrakken (Bryozoa)

    NARCIS (Netherlands)

    Faassen, M.; Coolen, J.W.P.; Gittenberger, A.; Schrieken, N.

    2016-01-01

    In het kader van het project ‘Duik de Noordzee Schoon’ worden scheepswrakken
    onderzocht, beschreven en van afval ontdaan. Scheepswrakken vormen een bijzonder leefgebied in het mariene milieu, met een hoge biodiversiteit. Dit bleek weer tijdens onderzoek van visnetten die van ver weg gelegen

  13. Ingredienten voor kwaliteitsborging van modelonderzoek

    NARCIS (Netherlands)

    Grinsven JJM van; Haan BJ de; Braat LC; MNV; LBG; CIM

    1995-01-01

    In dit rapport wordt een aanzet gepresenteerd tot harmonisatie van de kwaliteitsborging van modelonderzoek in het RIVM. Het rapport komt voort uit initiatieven van leden van het Intersectoraal Modellen Overleg. Het rapport is in eerste instantie bedoeld voor onderzoekers die modellen ontwikkelen

  14. Kringloop als basis van bedrijfsvoering

    NARCIS (Netherlands)

    Linde, van der A.

    2007-01-01

    Gerard Keurentjes bekijkt zijn bedrijf als kringloop waarin grond en koeien de spil zijn. Het gebruik van microbiotica in plaats van antibiotica past daarin perfect. Een microbioticum bestaat uit een mengsel van acht kruiden opgelost in alcohol. Onderzoek toont aan dat het de productie van witte blo

  15. Burnout : de stand van zaken

    NARCIS (Netherlands)

    Taris, T.; Houtman, I.L.D.; Schaufeli, W.

    2013-01-01

    Dit artikel geeft een overzicht van de stand van zaken in het onderzoek naar burnout. Burnout is een syndroom van extreme vermoeidheid (uitputting), afstand nemen van het werk (distantie) en weinig vertrouwen in het eigen kunnen (verminderde competentie), waarbij de oorzaken voor deze aspecten

  16. Excitement tem-horn antenna by impulsive relativistic electron beam

    CERN Document Server

    Balakirev, V A; Egorov, A M; Lonin, Y F

    2000-01-01

    In the given operation the opportunity of reception powerful electromagnetic irradiation (EMI) is observationally explored by excitation by a impulsive relativistic electronic beam (IREB) of a TEM-horn antenna. It is revealed, that at such expedient of excitation of the TEM-horn antenna, the signal of radiation of the antenna contains three various components caused by oscillation of radiation by forward front IREB, high-voltage discharge between plates irradiation of TEM-horn antenna a and resonant properties of the antenna devices.

  17. Epigenetic Mechanisms Underlying Developmental Plasticity in Horned Beetles

    Directory of Open Access Journals (Sweden)

    Sophie Valena

    2012-01-01

    Full Text Available All developmental plasticity arises through epigenetic mechanisms. In this paper we focus on the nature, origins, and consequences of these mechanisms with a focus on horned beetles, an emerging model system in evolutionary developmental genetics. Specifically, we introduce the biological significance of developmental plasticity and summarize the most important facets of horned beetle biology. We then compare and contrast the epigenetic regulation of plasticity in horned beetles to that of other organisms and discuss how epigenetic mechanisms have facilitated innovation and diversification within and among taxa. We close by highlighting opportunities for future studies on the epigenetic regulation of plastic development in these and other organisms.

  18. Effectief leren van multimedia

    NARCIS (Netherlands)

    Kester, Liesbeth

    2013-01-01

    Kester, L. (2012, March). Effectief leren van multimedia [Effective learning from multimedia]. Keynote presented at a miniconference Learning Sciences of the Open University of the Netherlands, Eindhoven, the Netherlands.

  19. Effectief leren van multimedia

    NARCIS (Netherlands)

    Kester, Liesbeth

    2013-01-01

    Kester, L. (2012, March). Effectief leren van multimedia [Effective learning from multimedia]. Keynote presented at a miniconference Learning Sciences of the Open University of the Netherlands, Eindhoven, the Netherlands.

  20. Nematologische aspecten van kruidenteelten

    NARCIS (Netherlands)

    Beers, van T.G.; Molendijk, L.P.G.; Mheen, van der H.J.C.J.

    2005-01-01

    Het onderzoek heeft zich geconcentreerd op de kruiden maggi, valeriaan en peterselie en de aaltjes Pratylenchus penetrans, Paratrichodorus pachydermus en Meloidogyne chitwoodi. Uit de proeven en de inventarisatie van praktijkpercelen met valplekken is gebleken dat maggi, valeriaan en peterselie alle

  1. Ellis Van Creveld syndrome

    Directory of Open Access Journals (Sweden)

    Shilpy S

    2007-05-01

    Full Text Available Ellis Van Creveld syndrome is a rare disorder and is a form of short-limbed dwarfism. It is an autosomal recessive disorder characterized by tetrad of disproportionate dwarfism, post-axial polydactyly, ectodermal dysplasia and heart defects. This case report presents a classical case of a seven-year-old boy with Ellis Van Creveld syndrome presented with discrete clinical findings.

  2. Europese toetsing van algemene voorwaarden

    NARCIS (Netherlands)

    Loos, M.B.M.

    2001-01-01

    In deze bijdrage bespreekt Loos het Océano-arrest van het Hof van Justitie van 27 juni 2000, C-240/98 t/m C-244/98, NJ 2000, 730 (Océano Grupo Editorial SA et al./R. Murciano Quintero et al.). Uit de beslissing van het Hof van Justitie is af te leiden dat de rechter ambtshalve dient te toetsen of

  3. Space Van system update

    Science.gov (United States)

    Cormier, Len

    1992-07-01

    The Space Van is a proposed commercial launch vehicle that is designed to carry 1150 kg to a space-station orbit for a price of $1,900,000 per flight in 1992 dollars. This price includes return on preoperational investment. Recurring costs are expected to be about $840,000 per flight. The Space Van is a fully reusable, assisted-single-stage-to orbit system. The most innovative new feature of the Space Van system is the assist-stage concept. The assist stage uses only airbreathing engines for vertical takeoff and vertical landing in the horizontal attitude and for launching the rocket-powered orbiter stage at mach 0.8 and an altitude of about 12 km. The primary version of the orbiter is designed for cargo-only without a crew. However, a passenger version of the Space Van should be able to carry a crew of two plus six passengers to a space-station orbit. Since the Space Van is nearly single-stage, performance to polar orbit drops off significantly. The cargo version should be capable of carrying 350 kg to a 400-km polar orbit. In the passenger version, the Space Van should be able to carry two crew members - or one crew member plus a passenger.

  4. De trek van kruiden van volgroeid wortelmateriaal : handleiding van A tot Z in beknopte vorm

    NARCIS (Netherlands)

    Wijk, van C.A.P.

    2005-01-01

    Deze teelthandleiding richt zich op de trek van vooral dragon, krulpeterselie, rucola en munt, uitgaande van wortelmateriaal dat in de vollegrond wordt geteeld. Deze forcering richt zich zowel op aanbod van kruiden in potjes als de meermalige oogst van het gesneden product in een kas of een trekruim

  5. Methode van onderzoek voor residuen van bestrijdingsmiddelen afgeleid van triazines in levensmiddelen (Multimethode 7)

    NARCIS (Netherlands)

    Greve PA

    1988-01-01

    In dit rapport wordt een methode gegeven voor de clean-up van extracten m.b.v. gelpermeatiechromatografie (GPC) t.b.v. de bepaling van residuen van electron-captieve en organofosforbestrijdingsmiddelen. Een oudere versie van de GPC-methode, die alleen de organochloorbestrijdingsmiddelen omvatte,

  6. Opening van vier nieuwe laboratoria van de Afdeling der Werktuigbouwkunde van de Technische Hogeschool Delft

    NARCIS (Netherlands)

    Boon, E.F.; Boot, J.; Vahl, L.; Van Eldik Thieme, H.C.A.; Blok, H.

    1959-01-01

    Samenvatting van de toespraak door Prof.ir, R. van Hasselt bij de officiele opening van vier nieuwe laboratoriavan de Afdeling der Werktuigbouwkunde Boon, E.F. en Boot, J.: het Laboratorium voor Chemische Werktuigen Vahl, L.: het Laboratorium voor Koudetechniek Van Eldik Thieme, H.C.A.: het

  7. Plaatsen van beschaafd vertier

    Directory of Open Access Journals (Sweden)

    James Kennedy

    2014-09-01

    Full Text Available Plaatsen van beschaafd vertier [Places of civilised amusement] by Jan Hein Furnée, which appeared as a PhD thesis in 2007 and was adapted and extended into a book in 2012, is regarded by historians of the Low Countries as an impressive tour de force. In a stimulating manner Furnée demonstrates with this profound urban history that for the elite of The Hague leisure activities played an important role in acquiring status and maintaining their position. His study is based on extensive and systematic research into a great variety of sources, from census registers, membership lists of clubs and societies to address books. This gives the reader an extraordinarily detailed picture of the changing social relations in the upper echelons of society in The Hague in the latter half of the nineteenth century. The sophisticated use of both qualitative and quantitative methods can serve as a model for other historians in the field of urban history. In a lively fashion Furnée shows that the inhabitants of The Hague grasped at all kinds of pastimes in order to distinguish themselves from others, and when possible to increase their own status through their participation in elegant societies, theatre visits or supporting the proposed zoo: but the book also makes statements about status and class, the history of gender and of politics at the end of the nineteenth century. Plaatsen van beschaafd vertier van Jan Hein Furnée dat in 2007 als proefschrift en in 2012 bewerkt en uitgebreid als boek verscheen, staat onder historici van de Lage Landen bekend als een imponerende tour de force. Op prikkelende wijze laat Furnée in deze diepgravende stadsgeschiedenis zien dat vrijetijdsbesteding voor Haagse elites een belangrijke rol speelde in standsvorming en handhaving van hun positie. Zijn studie is gebaseerd op uitgebreid en systematisch onderzoek van veelsoortige bronnen, van volkstellingsregisters, ledenlijsten van verenigingen en sociëteiten tot adresboeken

  8. A "Queen of Hearts" trial of organ markets: why Scheper-Hughes's objections to markets in human organs fail.

    Science.gov (United States)

    Taylor, J S

    2007-04-01

    Nancy Scheper-Hughes is one of the most prominent critics of markets in human organs. Unfortunately, Scheper-Hughes rejects the view that markets should be used to solve the current (and chronic) shortage of transplant organs without engaging with the arguments in favour of them. Scheper-Hughes's rejection of such markets is of especial concern, given her influence over their future, for she holds, among other positions, the status of an adviser to the World Health Organization (Geneva) on issues related to global transplantation. Given her influence, it is important that Scheper-Hughes's moral condemnation of markets in human organs be subject to critical assessment. Such critical assessment, however, has not generally been forthcoming. A careful examination of Scheper-Hughes's anti-market stance shows that it is based on serious mischaracterisations of both the pro-market position and the medical and economic realities that underlie it. In this paper, the author will expose and correct these mischaracterisations and, in so doing, show that her objections to markets in human organs are unfounded.

  9. HARP model rotor test at the DNW. [Hughes Advanced Rotor Program

    Science.gov (United States)

    Dawson, Seth; Jordan, David; Smith, Charles; Ekins, James; Silverthorn, Lou

    1989-01-01

    Data from a test of a dynamically scaled model of the Hughes Advanced Rotor Program (HARP) bearingless model main rotor and 369K tail rotor are reported. The history of the HARP program and its goals are reviewed, and the main and tail rotor models are described. The test facilities and instrumentation are described, and wind tunnel test data are presented on hover, forward flight performance, and blade-vortex interaction. Performance data, acoustic data, and dynamic data from near field/far field and shear layer studies are presented.

  10. The spike timing precision of FitzHugh-Nagumo neuron network coupled by gap junctions

    Institute of Scientific and Technical Information of China (English)

    Zhang Su-Hua; Zhan Yong; Yu Hui; An Hai-Long; Zhao Tong-Jun

    2006-01-01

    It has been proved recently that the spike timing can play an important role in information transmission, so in this paper we develop a network with N-unit FitzHugh-Nagumo neurons coupled by gap junctions and discuss the dependence of the spike timing precision on synaptic coupling strength, the noise intensity and the size of the neuron ensemble. The calculated results show that the spike timing precision decreases as the noise intensity increases; and the ensemble spike timing precision increases with coupling strength increasing. The electric synapse coupling has a more important effect on the spike timing precision than the chemical synapse coupling.

  11. Markov chain Monte Carlo approach to parameter estimation in the FitzHugh-Nagumo model.

    Science.gov (United States)

    Jensen, Anders Chr; Ditlevsen, Susanne; Kessler, Mathieu; Papaspiliopoulos, Omiros

    2012-10-01

    Excitability is observed in a variety of natural systems, such as neuronal dynamics, cardiovascular tissues, or climate dynamics. The stochastic FitzHugh-Nagumo model is a prominent example representing an excitable system. To validate the practical use of a model, the first step is to estimate model parameters from experimental data. This is not an easy task because of the inherent nonlinearity necessary to produce the excitable dynamics, and because the two coordinates of the model are moving on different time scales. Here we propose a Bayesian framework for parameter estimation, which can handle multidimensional nonlinear diffusions with large time scale separation. The estimation method is illustrated on simulated data.

  12. Synchronization in heterogeneous FitzHugh-Nagumo networks with hierarchical architecture

    Science.gov (United States)

    Plotnikov, S. A.; Lehnert, J.; Fradkov, A. L.; Schöll, E.

    2016-07-01

    We study synchronization in heterogeneous FitzHugh-Nagumo networks. It is well known that heterogeneities in the nodes hinder synchronization when becoming too large. Here we develop a controller to counteract the impact of these heterogeneities. We first analyze the stability of the equilibrium point in a ring network of heterogeneous nodes. We then derive a sufficient condition for synchronization in the absence of control. Based on these results we derive the controller providing synchronization for parameter values where synchronization without control is absent. We demonstrate our results in networks with different topologies. Particular attention is given to hierarchical (fractal) topologies, which are relevant for the architecture of the brain.

  13. Hub-enhanced noise-sustained synchronization of an externally forced FitzHugh-Nagumo ring

    Science.gov (United States)

    Sánchez, Alejandro D.; Izús, Gonzalo G.; dell'Erba, Matías G.; Deza, Roberto R.

    2017-02-01

    A ring of FitzHugh-Nagumo units with antiphase coupling between their activator fields and submitted to a adiabatic harmonic subthreshold signal, is in turn globally coupled in electrical mode with the activator field of a hub. Noise sustained synchronization of neural activity with the signal is numerically observed, and theoretically characterized. The different dynamical regimes are elucidated using the concept of nonequilibrium potential, and the hub is found to promote network synchronization. The minimum noise intensities triggering the activation and synchronization processes are estimated in the framework of a three-neuron model.

  14. Synchronization and associative memory of FitzHugh-Nagumo neuronal networks with randomly distributed time delays

    Energy Technology Data Exchange (ETDEWEB)

    Peng, J H; Wu, Y J [School of Information Science and Engineering, East China University of Science and Technology, Shanghai 200237 (China); Yu, H J [Department of Mechanics, Shanghai Jiao Tong University, Shanghai 200240 (China)], E-mail: jhpeng@ecust.edu.cn

    2008-02-15

    Synchronization and associative memory in a neural network composed of the widely discussed FitzHugh-Nagumo neurons is investigated in this paper. Based on the reality of the microscopic biological structure in the neural system, the couplings among those neurons are accompanied with randomly distributed time delays which models the times needed for pulses propagating on the axons from the presynaptic neurons to the postsynaptic neurons. The memory is represented in the spatiotemporal firing pattern of the neurons, and the memory retrieval is accomplished with the fluctuations of the noise in the system.

  15. Variant attachments of the anterior horn of the medial meniscus.

    Science.gov (United States)

    Jakubowicz, Marian; Ratajczak, Wojciech; Pytel, Andrzej

    2003-01-01

    The purpose of this study was to analyse the occurrence of variants of anomalous insertions of the anterior horn of the medial meniscus in human knee joints. The study was carried out on 78 human lower limbs of both sexes (42 males and 36 females). Out of 78 knee joints, 10 knee joints (12.82%) presented atypical attachments of the anterior horn of the medial meniscus. In 9 cases we found that the anterior horn of the medial meniscus was attached to the transverse ligament of the knee and in 1 case it was attached to the coronary ligament. In the remaining cases the anterior horn of the medial meniscus was attached to the anterior intercondylar area of the tibia.

  16. Integrated horn antennas for millimeter-wave applications

    Science.gov (United States)

    Rebeiz, Gabriel M.; Katehi, Linda P. B.; Ali-Ahmad, Walid Y.; Eleftheriades, George V.; Ling, Curtis C.

    1992-02-01

    The development of integrated horn antennas since their introduction in 1987 is reviewed. The integrated horn is fabricated by suspending a dipole antenna, on a thin dielectric membrane, in a pyramidal cavity etched in silicon. Recent progress has resulted in optimized low- and high-gain designs, with single and double polarization for remote-sensing and communication applications. A full-wave analysis technique has resulted in an integrated antenna with performance comparable to that of waveguide-fed corrugated-horn antennas. The integrated horn design can be extended to large arrays, for imaging and phased-array applications, while leaving plenty of room for the RF and IF processing circuitry. Theoretical and experimental results at microwave frequencies and at 90 GHz, 240 GHz, and 802 GHz are presented.

  17. A comparative study of corrugated horn design by evolutionary techniques

    Science.gov (United States)

    Hoorfar, A.

    2003-01-01

    Here an evolutionary programming algorithm is used to optimize the pattern of a corrugated circular horn subject to various constraints on return loss, antenna beamwidth, pattern circularity, and low cross polarization.

  18. 空间离散Fitz-Hugh-Nagumo方程和双稳反应扩散方程组的渐近行为%Asymptotic Behavioui of Spatial Discretized Fitz-Hugh-Nagumo Equations and Bistable Reaction Diffusion Equations

    Institute of Scientific and Technical Information of China (English)

    黄建华; 路钢

    2000-01-01

    In this paper, we discuss the asymptotic behaviour of spatial disretization of Fitz-Hugh-Nagumo equations and bistable reaction diffusion equations with Neumamn boundary conditions, and the invariant regions, absorbing sets and global attractors are obtained and the estimation of Hausdorff dimension is given.%本文利用扰动方法,研究了Fitz-Hugh-Nagumo方程和双稳反应扩散方程在Neuman边值条件下空间离散后的渐近行为,证明了两个格微分方程组的不变区域、吸引集和整体吸引子的存在性,并给出了离散Fitz-Hugh-Nagumo方程的整体吸引子的Hausdorff维数估计.

  19. Design and layout of rectangular waveguide horns antennas

    Science.gov (United States)

    Fasold, D.; Pecher, H.

    Theoretical basis of waveguide horn antennas (WHA) is outlined. Applicable design curves, such as nomograms for determining gain and a diagram for laying out necessary waveguide dimensions, are given. Use of WHA designs in satellite radio and television systems is discussed. Antenna radiation pattern calculations are treated and optimization problems are dealt with. Based on design feasibility results, a laboratory model of a transmitter antenna for TV-SAT was built. The equipment, an elliptical waveguide horn design, demonstrates satisfactory performance.

  20. Quantum Information Measurements for Garfinkle-Horne Dilaton Black Holes

    Institute of Scientific and Technical Information of China (English)

    GE Xian-Hui; SHEN You-Gen

    2004-01-01

    @@ The quantum non-cloning theorem is discussed for Garfinkle-Horne dilaton black holes. It is found that if the black hole complementarity principle is correct, then it will be questioned whether the quantum non-cloning theorem is well established inside the inner horizon. It is also found that another complementarity principle may be needed inside the inner horizon of the Garfinkle-Horne dilaton black hole.

  1. Combating Rhino Horn Trafficking: The Need to Disrupt Criminal Networks

    Science.gov (United States)

    Haas, Timothy C.; Ferreira, Sam M.

    2016-01-01

    The onslaught on the World’s wildlife continues despite numerous initiatives aimed at curbing it. We build a model that integrates rhino horn trade with rhino population dynamics in order to evaluate the impact of various management policies on rhino sustainability. In our model, an agent-based sub-model of horn trade from the poaching event up through a purchase of rhino horn in Asia impacts rhino abundance. A data-validated, individual-based sub-model of the rhino population of South Africa provides these abundance values. We evaluate policies that consist of different combinations of legal trade initiatives, demand reduction marketing campaigns, increased anti-poaching measures within protected areas, and transnational policing initiatives aimed at disrupting those criminal syndicates engaged in horn trafficking. Simulation runs of our model over the next 35 years produces a sustainable rhino population under only one management policy. This policy includes both a transnational policing effort aimed at dismantling those criminal networks engaged in rhino horn trafficking—coupled with increases in legal economic opportunities for people living next to protected areas where rhinos live. This multi-faceted approach should be the focus of the international debate on strategies to combat the current slaughter of rhino rather than the binary debate about whether rhino horn trade should be legalized. This approach to the evaluation of wildlife management policies may be useful to apply to other species threatened by wildlife trafficking. PMID:27870917

  2. Psigologiese benadering van pastorale arbeid

    Directory of Open Access Journals (Sweden)

    D. J. Strümpfer

    1969-03-01

    Full Text Available In die spreektaal van ons Afrikaanse kerke is ons lief om die bedienaar van die Woord aan te dui as „die predikant”, „die leraar” of „die dominee”. Miskien plaas ons met hierdie semantiese gebruik van terme wat lering en proklamering impliseer, ’n ongelukkige klem op die preekamp. Daarteenoor, het ons semanties miskien iets te leer van die Pinkstersektes wat die benaming „pastoor” verkies, of die Amerikaanse ge­ bruik van die term „the pastor”. Ons is wel lief om te praat van „ons herder en leraar”. Veelal word die herderlike, of pastorale, deel van die taak van die bedienaar van die Woord egter in sy eie gedagtes, asook in die gedagtes van sy gemeentelede, deur die leraarskap op die agtergrond gedwing. Al te dikwels word hy deur gemeentelede beskou as iemand wat op Sondag op die kansel gesien moet word en wat niks met die res van hul lewens te doen het nie. Herstel van die pastoraat sal deel moet wees van die proses om die ontkerstening van die hedendaagse lewe teen te gaan.

  3. Thirty years of collaboration with Gabriel Horn.

    Science.gov (United States)

    Bateson, Patrick

    2015-03-01

    All the collaborative work described in this review was on the process of behavioural imprinting occurring early in the life of domestic chicks. Finding a link between learning and a change in the brain was only a first step in establishing a representation of the imprinting object. A series of overlapping experiments were necessary to eliminate alternative explanations. Once completed, a structure, the intermediate and medial mesopallium (IMM), was found to be strongly linked to the formation of a neural representation of the object used for imprinting the birds. With the site identified, lesion experiments showed that it was necessary for imprinting but not associative learning. Also the two sides of the brain responded differently with the left IMM acting as a permanent store and the right side acting as a way station to other parts of the brain. The collaborative work led to many studies by Gabriel Horn with others on the molecular and cellular bases of imprinting, and also to neural net modelling and behavioural studies with me on the nature of category formation in intact animals. Copyright © 2014 Elsevier Ltd. All rights reserved.

  4. Restoration of the Golden Horn Estuary (Halic).

    Science.gov (United States)

    Coleman, Heather M; Kanat, Gurdal; Aydinol Turkdogan, F Ilter

    2009-12-01

    Restoration of the iconic Golden Horn Estuary in Istanbul, Turkey was a substantial political, logistical, ecological, and social challenge. Forty years of uncontrolled industrial and urban growth resulted in thick layers of anoxic sediment, toxic bacteria, strong hydrogen sulfide odor, and ecologically unlivable conditions. The major components of restoration, spanning two decades, have included (1) demolition and relocation of industries and homes along the shore, (2) creation of wastewater infrastructure, (3) removal of anoxic sludge from the estuary, (4) removal of a floating bridge that impeded circulation, and (5) creation of cultural and social facilities. Although Turkey is not known as an environmental leader in pollution control, the sum of these efforts was largely successful in revitalizing the area through dramatic water quality improvement. Consequently, the estuary is once again inhabitable for aquatic life as well as amenable to local resource users and foreign visitors, and Istanbul has regained a lost sense of cultural identity. This paper focuses on literature review and personal interviews to discuss the causes of degradation, solutions employed to rehabilitate the estuary, and subsequent physicochemical, ecological, and social changes.

  5. Montage of a Queering Deferred: Memory, Ownership, and Archival Silencing in the Rhetorical Biography of Langston Hughes.

    Science.gov (United States)

    Summers, Ian

    2016-01-01

    This article explores the intersection of archival privilege and heteronormative bias in the queering of Langston Hughes. Although it has been a common belief in LGBTQ communities that Hughes was gay, the battle over how his sexuality is defined in various biographical texts involves broader issues of dominant representations of sexuality and who gets to speak for those no longer able to speak for themselves. As such, the article examines the texts Looking for Langston and The Life of Langston Hughes as well as the discourses that surrounded both. Through this case study, it is apparent that there are still numerous cultural challenges posed to historical queering and that scholars must take an inventive approach to overcome them.

  6. Leren van huisontruimingen

    Directory of Open Access Journals (Sweden)

    Gert Schout

    2011-11-01

    Full Text Available Preventing evictions Background. An eviction is a dramatic event. There is little knowledge on the process that precedes an eviction and how to prevent evictions. Method. An exploratory descriptive study based on seven case studies. Results. The process of a evictions is multifaceted and complex, but is determined by discontent over unfulfilled expectations, stereotyping, hardening, impotence, over-specialization, narrow-mindedness and lack of cooperation. Implications for practice that can be inferred from this study: institutionalize conflict capability. This means sensitivity to signals and signs of escalation, recognizing signs of hardening of positions, investing in skills and de-escalation skills like metacommunication and negotiation skills. Leren van huisontruimingen Achtergrond. Een huisontruiming is een ingrijpende gebeurtenis. Over hoe huisontruimingen verlopen en hoe ze zijn te voorkomen is weinig bekend. Methode. Een exploratief beschrijvend onderzoek gebaseerd op zeven casestudies. Resultaten. Het proces tot een huisontruiming is veelvormig en complex maar wordt bepaald door onvrede over niet ingeloste verwachtingen, stereotypering, verharding, onmacht, overspecialisatie, blikvernauwing en gebrekkige samenwerking. De volgende aanwijzing voor de praktijk kan worden afgeleid uit deze studie: institutionaliseer het vermogen om conflicten op constructieve wijze tegemoet te treden. Dit betekent het gevoelig worden voor signalen en voortekenen van escalatie, herkennen van tekenen van verharding van standpunten, het investeren in de-escaleren vaardigheden als metacommunicatie en onderhandelen.

  7. Berta and Adelaide: the policy of consolidation of the royal power of Hugh of Arles

    Directory of Open Access Journals (Sweden)

    Giacomo Vignodelli

    2012-10-01

    Full Text Available Both twins dowers made up by Hugh of Provence, king of Italic Kingdom, for his betrothal with Berta and that of his son Lothair with Adelaide, have to be understood within the policy of strengthening the royal power led by the king in the Thirties of the Tenth century: the dowers are in fact the crown of that policy. The double dower constitution supplies the king of Italy the opportunity to reserve for himself (and for the new formed young royal couple a strong control of the center of the Po valley around Pavia and dismantles (for the benefit of the royal domain ducal bases of power in Tuscia. The analysis of the work of Hugh allows us to understand its policy towards the aristocracy and the mechanisms for the promotion of new families (Aleramici, Obertenghi, Canossa. The original documents of dower were kept in the monastery of St. Salvatore of Pavia, founded by Adelaide; this locations isn’t due to the goods endowment of the monastery but to their importance as instrument of political legitimacy of the new Ottonian royal family.

  8. Frequency Effect of Harmonic Noise on the FitzHugh-Nagumo Neuron Model

    Institute of Scientific and Technical Information of China (English)

    宋艳丽

    2011-01-01

    Using harmonic noise,the frequency effect of noise on the FitzHugh-Nagumo neuron model is investigated.The results show that the neuron has a resonance characteristic and responds strongly to the noise with a certain frequency at fixed power.Driven by the noise with this frequency,the train is most regular and the coefficient of variation R has a minimum.The imperfect synchronization takes place,which,however,is optimal only for noise with an appropriate frequency.It is shown that there exists coherence resonance related to frequency.%Using harmonic noise, the frequency effect of noise on the FitzHugh-Nagumo neuron model is investigated. The results show that the neuron has a resonance characteristic and responds strongly to the noise with a certain frequency at fixed power. Driven by the noise with this frequency, the train is most regular and the coefficient of variation R has a minimum. The imperfect synchronization takes place, which, however, is optimal only for noise with an appropriate frequency. It is shown that there exists coherence resonance related to frequency.

  9. Die instelling van die doop

    Directory of Open Access Journals (Sweden)

    J. L. Venter

    1989-06-01

    Full Text Available Die eerste plek in die evangeliebeskrywings waar daar van die doop as ’n opdrag van Jesus Christus gepraat word en waar die betekenis die duidelikste uitkristalliseer, staan in Matteus 28 : 16 - 20. Heilshistories gesien, is dit die begin van kerklike inlywing van die wat gehoor het hoedat Jesus sy koninkryk proklameer, die evangelie aanvaar en tot bekering kom. Vir die doel van hierdie artikel word hierdie gedeelte ondersoek om te sien hoe die instelling geskied het, wat die plek en betekenis van die Christelike doop is.

  10. Effecten van de verregening van EDTA-houdend zuivelafvalwater

    NARCIS (Netherlands)

    Drent, J.

    1981-01-01

    In een kolomproef en via literatuuronderzoek is het effect van verschillende gehalten aan EDTA (Ethyl-Diamine-Tetra-Azijnzuur) in het afvalwater op de gehalten van metaalionen in het drainwater onderzocht.

  11. Effecten van de verregening van EDTA-houdend zuivelafvalwater

    NARCIS (Netherlands)

    Drent, J.

    1981-01-01

    In een kolomproef en via literatuuronderzoek is het effect van verschillende gehalten aan EDTA (Ethyl-Diamine-Tetra-Azijnzuur) in het afvalwater op de gehalten van metaalionen in het drainwater onderzocht.

  12. Praktijkkennis van leerkrachten als ontwerpers van een ICT rijke leeromgeving

    NARCIS (Netherlands)

    Boschman, Ferry; McKenney, Susan; Voogt, Joke

    2011-01-01

    Ormel, B., Pareja, N., & McKenney, S. (2011, 8-10 June). Praktijkkennis van leerkrachten als ontwerpers van een ICT rijke leeromgeving. Presentation at the ORD annual meeting, Maastricht, The Netherlands.

  13. De functionele eigenschappen van suiker : de rol van suiker

    NARCIS (Netherlands)

    Boekel, van M.A.J.S.

    2010-01-01

    Suiker kan om veel verschillende redenen aan voeding worden toegevoegd. Om de zoete smaak natuurlijk, maar er is meer. Professor Tiny van Boekel van Wageningen Universiteit legt uit waarom suiker zo uniek is.

  14. Duurzaamheidsaspecten van de teelt en verwerking van energiegewassen in Zuidoost Nederland

    NARCIS (Netherlands)

    Conijn, J.G.; Corré, W.J.

    2009-01-01

    Resultaten van berekeningen van de effecten van teelt en verwerking van energiegewassen van vier verschillende ketens. De duurzaamheidsaspecten die aan bod komen zijn: vermindering fossiel energiegebruik en broeikasgas (BKG) emissie, behoud organische stof in de bodem, nitraatuitspoeling uit de bode

  15. SÍNDROME DE FITZ-HUGH-CURTIS COMO HALLAZGO DURANTE CIRUGÍA GINECOLÓGICA

    OpenAIRE

    Ricci A,Paolo; Solà D,Vicente; Pardo S,Jack

    2009-01-01

    El síndrome de Fitz-Hugh-Curtis es una perihepatitis producida por una peritonitis secundaria al ascenso de bacterias, como resultado de una enfermedad inflamatoria pélvica. En la etapa crónica se pueden observar adherencias entre la pared abdominal y la superficie hepática, caracterizadas por la semejanza a "cuerdas de violín". Esta imagen es considerada criterio diagnóstico. Se presenta un caso de hallazgo de síndrome de Fitz-Hugh-Curtis, pesquisado durante la inspección rutinaria de la cav...

  16. SÍNDROME DE FITZ-HUGH-CURTIS COMO HALLAZGO DURANTE CIRUGÍA GINECOLÓGICA

    OpenAIRE

    Ricci A,Paolo; Solà D,Vicente; Pardo S,Jack

    2009-01-01

    El síndrome de Fitz-Hugh-Curtis es una perihepatitis producida por una peritonitis secundaria al ascenso de bacterias, como resultado de una enfermedad inflamatoria pélvica. En la etapa crónica se pueden observar adherencias entre la pared abdominal y la superficie hepática, caracterizadas por la semejanza a "cuerdas de violín". Esta imagen es considerada criterio diagnóstico. Se presenta un caso de hallazgo de síndrome de Fitz-Hugh-Curtis, pesquisado durante la inspección rutinaria de la cav...

  17. Onderrig van Generasie Y

    Directory of Open Access Journals (Sweden)

    Elza Venter

    2016-02-01

    Full Text Available Generasie Y-leerders is jongmense wat ongeveer tussen 1977 en 2000 gebore is. Hierdie leerders het voor skerms grootgeword, ongeag of dit televisie-, rekenaar- of selfoonskerms was. Hulle is gebore in ’n samelewing waar inligting, opvoeding en vermaak net ’n klik ver was. Navorsers meen dat dié leerders se kritiese denke en ander kognitiewe vaardighede geaffekteer is omdat hulle ’n aansienlike hoeveelheid tyd daaraan bestee het om woorde en beelde passief te absorbeer, eerder as om met insig te lees. Leerders uit die generasie is dikwels ongemotiveerd en onbetrokke by hul eie leerervaring omdat hulle hul gelyktydig op ’n menigte digitale toestelle vermaak, terwyl die opvoeder hulle aandag probeer kry. Hulle verkies multitaakverrigting eerder as om op een taak of persoon op ’n slag te fokus en stel dikwels meer belang in wat op die skerm voor hulle aangaan as in wat die onderwyser hulle kan bied. Opvoeders op sekondêre en tersiêre vlak moet kennis hiervan neem en opnuut dink oor hulle onderrig- en leerstrategieë. Die klem in hierdie navorsing val op leerders, studente en opvoeders op sekondêre en tersiêre vlak. Die navorsing is deur die toepassing van ’n literatuuroorsig gedoen. Die hoofnavorsingsvraag van die studie is: ‘Hoe kan Generasie Y-leerders beter deur opvoeders by hulle eie leer in die klaskamer of lesinglokaal betrek word?’ Die twee subvrae is: (1 ‘Wat is sommige van die eienskappe van Generasie Y-leerders wat leer beïnvloed?’ en (2 ‘Watter onderrigstrategieë kan gebruik word om Generasie Y-leerders meer by hulle eie leer te betrek?’ Die outeur van hierdie artikel wil poog om opvoeders deur die literatuurstudie van riglyne in hierdie verband te voorsien.

  18. Wave power plant at Horns Rev. Screening[Denmark]; Boelgekraftanlaeg ved Horns Rev. Screening

    Energy Technology Data Exchange (ETDEWEB)

    Soerensen, Hans C.; Nielsen, Kim; Steenstrup, P.R.; Friis-Madsen, E.; Wigant, L.

    2005-12-15

    The objective for the analysis has been to establish data for the sea at Horns Rev wind farm in the North Sea in order to assess the opportunity for using the site as test site for demonstration of wave energy devices exemplified by three different devices under development in Denmark. For comparison alternative sites like Hanstholm, Samsoe and Nissum Bredning are also assessed as well as the test centre EMEC at the Orkney Islands and the proposed test site Wave Hub at the north coast of Cornwall. The analysis shows that it is possible without major technical problems to connect 2-4 MW power generated by 3 different wave energy devices (AquaBuOY, Wave Star Energy and Wave Dragon) to the wind farm at Horns Rev (www.hornsrev.dk). The expenses for connection and regulation within the wind farm is about 200,000 DKK (30,00 EURO). On top of this comes the cost for individual sub sea cable connection to the wave devices, pull in of the sub sea cable through the existing J-tube in turbine T04 and the necessary regulation/control system in the individual wave devices to avoid damaging the power system in case of too high production. The analysis of the co-production of wind and wave power is dealt with in a separate report which shows that over a time period of half to one hour the time variation for wind generated electricity is 3 times as large as for wave energy generated power based on the actual measurement at Horns Rev. Further on the analysis shows that the wave generated power is more predictable than wind energy generated power as the power from the waves first is present about 2 hours after the wind is acting and last for 3 to 6 hours after the wind dies out; 6 to 12 hours with wind from west. The time is off course strongly depending of the direction of the wind i.e. the fetch. As this special report has a more general scope than the analysis as such it is reported in English (Annex Report II). The analysis shows that it is up to the individual device developer

  19. Feminisering van het basisonderwijs

    OpenAIRE

    Geerdink, Gerda

    2009-01-01

    In deze bijdrage ga ik in op wat feminisering van het onderwijs is en hoe we daar de afgelopen 25 jaar – zowel op de pabo als in het basisonderwijs – mee te maken hebben gekregen. De keerzijde is masculinisering en ik zal eveneens laten zien hoe zich dat in het onderwijs voordoet. Zowel feminisering als masculinisering hebben negatieve gevolgen. Ik wil duidelijk maken dat de gevolgen van de feminisering minder erg zijn dan we volgens de pers moeten geloven, maar dat het desondanks een ongewen...

  20. Analise van die Tswanaraaisel

    Directory of Open Access Journals (Sweden)

    S. A. Swanepoel

    1984-05-01

    Full Text Available ’n Strukturele, stilistiese en funksionele bcskrywing van die Twanaraaisel bring mee dat daar aan die volgende aspekte aandag gegee moet word: •\tWat is ’n raaisel en lioe word dit in Tswana genoem. •\tTot watter studiegebied en literere genre hoort die raaisel en watter subvorme kan vir Tswana onderskei word. •\tHoe sien die struktuur van Tswanaraaisels daar uit. •\tDeur wie, waar, wanneer en hoe word Tswanaraaisels voorgedra. •\tWatter stilistiese kenmcrke kan in Tswanaraaisels onderskei word. •\tWatter funksies vervul raaisels in ’n Tswanagcmeenskap.

  1. Kwantificering van variatie in resultaten van een waterkwaliteitsmodel als gevolg van onzekerheden bij calibratie van modelparameters; case study van de Biebrza, Polen

    NARCIS (Netherlands)

    Perk, van der M.; Bierkens, M.F.P.

    1995-01-01

    De fout in resultaten van een waterkwaliteitsmodel van de Biebrza in Polen, die het gevolg is van onzekerheden bij kalibratie van modelparameters, is gekwantificeerd. De gebruikte methode combineert kalibratie en gevoeligheidsanalyse. Het model is gevalideerd om de bekwaamheid ervan te toetsen, waar

  2. BOGO van groene grondstoffen naar biobased materialen. eigenschappen van polymerlkzuur

    NARCIS (Netherlands)

    Schennink, G.G.J.; Beukelaer, de H.J.; Molenveld, K.

    2013-01-01

    Deze opdracht geeft inzicht in de eigenschappen van PLA en daarmee de toepassingsmogelijkheden. Het praktijkdeel van deze opdracht laat zien hoe door keuze van de juiste PLA typen en temperatuurbehandeling de maximale gebruikstemperatuur (HDT=Heat Distortion Temperature) verhoogd kan worden.

  3. Toepassing van de basisvrachtbenadering op fosfaat van compost; advies

    NARCIS (Netherlands)

    Ehlert, P.A.I.

    2005-01-01

    Bij het vormgeven van het stelsel van gebruiksnormen is een maatschappelijke discussie ontstaan over de aanvoer van fosfaat met grond in compost en zwarte grond. Deze deskstudie gaat in op vragen die hierbij gesteld zijn. Het aandeel grond in compost en zwarte grond en de hoeveelheid fosfaat daarin

  4. Vervanging insecticiden : bestrijding van ritnaalden in de teelt van gladiool

    NARCIS (Netherlands)

    Conijn, C.G.M.; Breedeveld, M.E.

    2004-01-01

    Van alle schadelijke bodeminsecten bij bloembollen vormen ritnaalden bij de teelt van gladiolen de grootste bedreiging. Minder massaal, doch voor de teler desastreus, komen bonenvlieg, aardrupsen en emelten als plaag voor of worden bestrijdingsmaatregelen daartegen getroffen. Alleen aan de hand van

  5. Bestemming van schoolverlaters van het middelbaar agrarisch onderwijs

    NARCIS (Netherlands)

    Spierings, C.J.M.; Wolsink, G.H.

    1984-01-01

    Dit rapport geeft inzicht in de bestemming van schoolverlaters van het middelbaar agrarisch onderwijs. De resultaten zijn gebaseerd op een enquete in 1982/83 onder ruim 2000 jongens en meisjes, die in 1978 in de laatste klas zaten. Centraal stond de vraag wie en hoeveel van deze jongeren boer of tui

  6. Koperemissies als gevolg van het gebruik van aangroeiwerende verven

    NARCIS (Netherlands)

    Ros JPM

    1987-01-01

    Het gebruik van aangroeiwerende verven voor schepen leidt tot Cu-emissies. Bij werven is dat voornamelijk het gevolg van stralen en spuiten van verflagen. Voor 1985 is dit geschat op 32 ton. Er resulteert onder meer sterk verontreinigde baggerspecie. Modelberekeningen laten zien, dat vergaande d

  7. Aspecten van het beheer van Wilde zwijnen op de Veluwe

    NARCIS (Netherlands)

    Groot Bruinderink, G.W.T.A.; Lammertsma, D.R.

    2008-01-01

    Eens in de zoveel jaren, zoals afgelopen winter, zijn er veel berichten over overlast veroorzakende wilde zwijnen op de Veluwe. Welke factoren hebben geleid tot de enorme toename van de Sus scrofa? Op basis van kennis van de relatie tussen het wilde zwijn en mast worden een aantal mogelijke beheersc

  8. Bepaling van lasalocid-natrium door middel van HPLC

    NARCIS (Netherlands)

    Beek, W.M.J.; Buizer, F.G.

    1981-01-01

    Lasalocid-natrium is volgens methode EEG doc. 1089/VI/81-E onderzocht in twee mengvoeders. De storende invloed van monensin, salinomycine en narasin werd eveneens bekeken. Lasalocid-natrium wordt als coccidiostaticum toegepast voor het gebruik van kippen op een doseringsniveau van 75-150 ppm. De voo

  9. Kwaliteit van enkelvoudige extramurale ergotherapie: de bruikbaarheid van een meetinstrument.

    NARCIS (Netherlands)

    Janssen, B.; Sixma, H.

    2003-01-01

    Het NIVEL heeft in samenwerking met de NVE een meetinstrument ontwikkeld dat de kwaliteit van enkelvoudige extramurale ergotherapeutische zorg meet vanuit het perspectief van de cliënt. De QUOTE-EEE is ontstaan door schriftelijke vragenlijsten te versturen aan cliënten, van instellingen en praktijke

  10. Toepassing van de basisvrachtbenadering op fosfaat van compost; advies

    NARCIS (Netherlands)

    Ehlert, P.A.I.

    2005-01-01

    Bij het vormgeven van het stelsel van gebruiksnormen is een maatschappelijke discussie ontstaan over de aanvoer van fosfaat met grond in compost en zwarte grond. Deze deskstudie gaat in op vragen die hierbij gesteld zijn. Het aandeel grond in compost en zwarte grond en de hoeveelheid fosfaat daarin

  11. Winkel van de toekomst, toekomst van de winkel?

    NARCIS (Netherlands)

    Hofste, M. (Marleen); Teeuw, W.B. (Wouter)

    2012-01-01

    Dit boekje geeft de resultaten weer van het project Future Store van het Saxion Kenniscentrum Design en Technologie. Het gedrag, de behoeften van de consument, trends en de technologische ontwikkelingen veranderen in een rap tempo. Om deze veranderingen te kunnen bijbenen hebben retailers, MKB- bedr

  12. Piracy around the Horn of Africa

    Directory of Open Access Journals (Sweden)

    Joshua Ho

    2009-09-01

    Full Text Available Piracy around the Horn of Africa has risen to a level serious enough for the international community to take concerted action to secure an international sea lane. However, the efforts so far have been initiated mainly by the international community while regional efforts are only just beginning. In the short term, more action will have to be taken at the operational level like dispatching more ships and integrating the operations of ships already deployed to the area. In the longer term, the root causes of piracy and the grievances of the Somali people have to be addressed. In particular, there is a need to restore law and order in Somalia by supporting moderate leaders in their attempts to create a representative government.La piraterie au large de la Corne de l’Afrique a augmenté à un degré tel que la communauté internationale a décidé d’agir de concert pour sécuriser cette voie maritime. Néanmoins, si les efforts entrepris sont principalement ceux de la communauté internationale, les démarches régionales ne sont qu’à leur commencement. Dans le court terme, davantage d’initiatives devront être prises au niveau opérationnel, comme l’envoi de bateaux supplémentaires et la coordination des actions menées. Dans le plus long terme, il faudra s’attaquer aux racines de la piraterie et aux difficultés auxquelles doivent faire face les Somaliens. Il s’agit en particulier de restaurer l’état de droit en supportant les chefs de file modérés dans leur tentative de créer un gouvernement représentatif.

  13. Family Bovidae (Hollow-horned Ruminants)

    Science.gov (United States)

    Groves, Colin P.; Leslie, David M.; Huffman, Brent A.; Valdez, Raul; Habibi, Khushal; Weinberg, Paul; Burton, James; Jarman, Peter; Robichaud, William

    2015-01-01

    Probably the single most eye-catching aspect of the current volume is the explosion of species recognized in the family Bovidae (Hollow-horned Ruminants). In 2005, the third edition of Mammal Species of the World listed 143 species in 50 genera of Bovidae. That list, prepared by the late Peter Grubb, was somewhat traditional and provisional, as he was engaged with his long-time colleague, Colin Groves, in a substantial revision of ungulate taxonomy. Their work, which will be published later this year, is the culmination of years of study of this important and wide-ranging family by these two venerable authorities. Colin Groves is the lead author for Bovidae in this volume of HMW, and in it we recognize all 279 species in 54 genera that are documented in his and Peter Grubb’s ground-breaking work.At the root of this expanded number of recognized species is our changing view of the modern species concept. Like a growing number of taxonomists, Groves favors a phylogenetic species concept, which he defines as the smallest population or aggregation of populations that has fixed heritable differences from other such populations or aggregations. This is in contrast to the traditional biological species concept, which requires reproductive isolation between such populations. The difficulty in determining that reproductive isolation led to an underrepresentation of the number of species in many groups. Clearly there remain problems in determining which differences between populations are heritable, and the system used here undoubtedly will continue to be tweaked as our understanding grows. For now, this greatly expanded version of Bovidae species limits seems the best answer. One of the goals of HMW is to provide an up-to-date summary of the conservation status for every species of mammal, and this expanded species concept better enables us to explore the true conservation situation of each.

  14. Sorptie van chloorfenolen in de bodem

    NARCIS (Netherlands)

    Lagas; P.; Snell; M.C.; Wytzes; H.

    1986-01-01

    Het sorptieproces alsmede de kinetiek van sorptie van chloorfenolen in natuurlijke en synthetische grondsoorten werd bestudeerd met behulp van laboratoriumexperimenten. Uit de resultaten bleek dat sorptie van chloorfenolen kan worden beschouwd als tweestapsproces. De eerste stap verloopt snel. D

  15. Kennis van de bacterieziekte ringrot groeit

    NARCIS (Netherlands)

    Custers, J.B.M.

    2002-01-01

    Kenmerken en verspreiding van ringrot in pootaardappelen. Gegevens in bijgaande tabel: Verspreiding van de ringrotbacterie binnen en tussen partijen pootgoed tijdens machinaal poten en de invloed van voorkieming en het ontsmetten van de machine hierop

  16. Big data en handschriften van Christiaan Huygens

    NARCIS (Netherlands)

    Damen, J.C.M.

    2013-01-01

    In de achtste aflevering van een serie combinatiebesprekingen (digitaalandspeciaal) schenkt Jos Damen aandacht aan een onderzoek naar big data van bibliotheekcatalogi en een catalogus van het werk van het Nederlandse genie Christiaan Huygens.

  17. De distributiestructuur van varkens in Nederland

    NARCIS (Netherlands)

    Driel, van J.A.

    1988-01-01

    Onderzoek naar de structuur van de afzet van levende varkens en biggen op basis van enquetes onder ruim 1000 varkenshouders en 150 veehandelaren. Het rapport beschrijft de situatie in 1986 en vergelijkt deze met die van 1973

  18. Oogst- en bewaartechnieken van wilgenstengels als energiegewas

    NARCIS (Netherlands)

    Gigler, J.K.; Sonneveld, C.

    1998-01-01

    IMAG-DLO onderzoekt de keten van teelt en logistiek van een aantal energiegewassen voor elektriciteitswinning. Voor dit onderzoek zijn hier verschillende experimenten uitgevoerd met de oogst van wilgenstengels. Wilgenteelt ten behoeve van energievoorziening

  19. Flotatieslib van slachterijen als voer voor varkens

    NARCIS (Netherlands)

    Smits, B.

    1984-01-01

    De belangrijkste resultaten worden weergegeven van de voederproeven met flotatieslib, slib dat ontstaat door uitvlokking van het afvalwater van slachterijen. In deze proeven is de voederwaarde en de gebruikswaarde van flotatieslib voor mestvarkens bepaald

  20. Verwachte economische effecten van uitbreidingsplannen

    NARCIS (Netherlands)

    Backus, G.; Bens, P.

    1994-01-01

    Vierentwintig varkenshouders hebben deelgenomen aan een onderzoek naar de effecten van voorgenomen uitbreidingsplannen. Gezinsuitgaven, betalingscapaciteit, ouderdom van de stallen en de uitbreidingsstrategie hebben een grote invloed op de bedrijfsresultaten

  1. Voer van invloed op biggensterfte

    NARCIS (Netherlands)

    Makkink, C.A.; Wientjes, J.G.M.

    2013-01-01

    Marginale verschillen in voeding en metabolisme vóór inseminatie kunnen leiden tot grote verschillen in prenatale en postnatale biggensterfte. Dit was een van de conclusies tijdens het seminar van de leerstoelgroep Adaptatiefysiologie in Wageningen University.

  2. De noodzaak van lokale verbindingen

    NARCIS (Netherlands)

    Jaarsma, C.F.; Heijman, W.J.M.; Voet, van der J.L.M.

    2004-01-01

    Het metropolitane landschap dreigt geleidelijk te worden versnipperd door aanleg en aanpassing van grootschalige infrastructuur. Dit artikel geeft een analyse van tijd en afstand, die nodig is, om aan openluchtrecreatie te doen: wandelen, fietsen, trimmen, paardrijden. Een onderverdeling is gemaakt

  3. Leibniz, metafysicus van het atoomtijdperk

    NARCIS (Netherlands)

    Romeijn, J.-W.

    2008-01-01

    Wat heeft de rekenkunde met de metafysica van doen? Massimo Mugnai laat ons in “Leibniz, Filosoof en Mathematicus” kennismaken met Leibniz als grondlegger van de logica. Maar dat is lang niet alles.

  4. De noodzaak van lokale verbindingen

    NARCIS (Netherlands)

    Jaarsma, C.F.; Heijman, W.J.M.; Voet, van der J.L.M.

    2004-01-01

    Het metropolitane landschap dreigt geleidelijk te worden versnipperd door aanleg en aanpassing van grootschalige infrastructuur. Dit artikel geeft een analyse van tijd en afstand, die nodig is, om aan openluchtrecreatie te doen: wandelen, fietsen, trimmen, paardrijden. Een onderverdeling is gemaakt

  5. Leibniz, metafysicus van het atoomtijdperk

    NARCIS (Netherlands)

    Romeijn, J.-W.

    2008-01-01

    Wat heeft de rekenkunde met de metafysica van doen? Massimo Mugnai laat ons in “Leibniz, Filosoof en Mathematicus” kennismaken met Leibniz als grondlegger van de logica. Maar dat is lang niet alles.

  6. Gaschromatografisch onderzoek naar de samenstelling van de vluchtige olie van Mentha piperita L. gedurende de ontwikkeling van de plant

    NARCIS (Netherlands)

    Malingré, Theodorus Maria

    1966-01-01

    SAMENVATTING Het doel van het beschreven onderzoek was door middel van gaschromatografie, gecombineerd met andere analysemethoden, de samenstelling van de vluchtige olie van Mentha piperita L. en de veranderingen hierin gedurende de ontwikkeling van de plant, te bepalen en uit de resultaten van het

  7. Samenstelling van de vluchtige olie van Origanum vulgare L. ssp. vulgare gedurende de ontwikkeling van de plant

    NARCIS (Netherlands)

    Maarse, Henk

    1971-01-01

    INLEIDING EN DOEL VAN HET ONDERZOEK Vele onderzoekers hebben de laatste jaren de vorming van de verbindingen in vluchtige olien van planten bestudeerd door het bepalen van de verandering in de samenstelling van de vluchtige olie tijdens de groei van de plant. Lemli (68) wees als eerste op de noodzaa

  8. Fitz-Hugh-Curtis syndrome: abdominal pain in women of 26 years old Síndrome de Fitz-Hugh-Curtis: dolor abdominal en mujer de 26 años

    Directory of Open Access Journals (Sweden)

    Liseth Rivero-Sánchez

    2011-10-01

    Full Text Available Fitz-Hugh-Curtis syndrome is an inflammation of the liver capsule as a complication of pelvic inflammatory disease, whose most common etiologic agent is the C. trachomatis. The acute phase of the Fitz-Hugh-Curtis syndrome may present itself with pain in right upper abdomen, commonly confused with other hepatobiliary and gastrointestinal tract diseases. Definitive diagnosis is now possible with non-invasive techniques such as ultrasound, computed tomography, as well as techniques to isolate the responsible germ, available in most centers.El síndrome de Fitz-Hugh-Curtis es una inflamación de la cápsula hepática, como complicación de una enfermedad inflamatoria pélvica, cuyo agente etiológico más frecuente es la C. trachomatis. La fase aguda del síndrome de Fitz-Hugh-Curtis puede presentarse con dolor en cuadrante superior derecho del abdomen, confundiéndose comúnmente con otras enfermedades hepatobiliares y del tracto gastrointestinal. El diagnóstico definitivo es posible hoy en día por técnicas no invasivas como ecografía, tomografía computarizada, además de técnicas para el aislamiento del germen responsable disponibles en la mayoría de los centros.

  9. Millimeter and Submillimeter-Wave Integrated Horn Antenna Schottky Receivers.

    Science.gov (United States)

    Ali-Ahmad, Walid Youssef

    1993-01-01

    Fundamental Schottky-diode mixers are currently used in most millimeter-wave receivers above 100GHz. The mixers use either a whisker-contacted diode or a planar Schottky diode suspended in a machined waveguide with an appropriate RF matching network. However, waveguide mounts are very expensive to machine for frequencies above 200GHz. Also, the whisker-contacted structure is not compatible with integrated mixers which represent the leading technology used for millimeter- and submillimeter-wave applications such as plasma diagnostics imaging arrays, radiometers, and anti-collision radars. In this work, a novel quasi-integrated horn antenna has been used for the receiver antenna. This antenna has a high gain and a high Gaussian coupling efficiency (97%), similar to machined scalar feed horns, but with the advantage of being easily fabricated up to at least 1.5THz. The quasi-integrated horn antenna is based on the integrated horn antenna structure. The integrated horn antenna consists of a pyramidal cavity with a 70^circ flare angle etched anisotropically in silicon. The cavity focuses the incoming energy on dipole-probe suspended on a membrane inside the horn. The integrated horn antenna does not suffer from dielectric losses or substrate mode losses since the feeding dipole antenna is integrated on a very thin dielectric layer. The mixer circuit, along with the feed dipole, are both integrated on the membrane wafer. The mixer diode is the University of Virginia surface channel planar diode which has a low parasitic capacitance. The diode is epoxied directly at the dipole apex without the need for an RF matching network, and with no mixer tuning required. At 92GHz,the DSB antenna-mixer conversion loss and noise temperature are 5.5dB and 770K, respectively. This represents the best reported results to this date for a quasi-optical mixer with a planar diode, at room temperature. At 335GHz, the DSB antenna-mixer noise temperature is 1750K and it is within 1dB of the

  10. Gezamenlijke ontwikkeling van digitale leermaterialen

    NARCIS (Netherlands)

    Hermans, Henry; De Vries, Fred

    2005-01-01

    Hermans, H. & de Vries, F. (2004). Gezamenlijke ontwikkeling van digitale leermaterialen. In: Van Geloven, M., Koper, R. & Van der Veen, J., E-learning trends (pp. 19-21). Utrecht, Stichting Digitale Universiteit.
    Ook beschikbaar in dspace: http://hdl.han

  11. Effect van fasenvoedering op reproductie

    NARCIS (Netherlands)

    Peet-Schwering, van der C.M.C.; Smolders, M.M.A.H.H.

    2004-01-01

    Het verstrekken van minder stikstof en fosfor aan drachtige zeugen gedurende de eerste vier pariteiten verhoogt het percentage terugkomers bij zeugen van pariteit 1 en 2. De overige reproductiekenmerken worden niet beïnvloed door het verstrekken van minder stikstof en fosfor in het voer. Ook is er g

  12. Uitroeiing van schurft op varkensbedrijven

    NARCIS (Netherlands)

    Vesseur, P.; Bokma-Bakker, M.

    1999-01-01

    Het Praktijkonderzoek Varkenshouderij heeft in opdracht van 'Diergezondheid in Beweging' een methodiek ontwikkeld voor het schurftvrij maken van varkensbedrijven. Voor het breed in de praktijk introduceren van de methode zijn een folder en een videoband beschikbaar. Gezien het te verwachten positiev

  13. Gezamenlijke ontwikkeling van digitale leermaterialen

    NARCIS (Netherlands)

    Hermans, Henry; De Vries, Fred

    2005-01-01

    Hermans, H. & de Vries, F. (2004). Gezamenlijke ontwikkeling van digitale leermaterialen. In: Van Geloven, M., Koper, R. & Van der Veen, J., E-learning trends (pp. 19-21). Utrecht, Stichting Digitale Universiteit.
    Ook beschikbaar in dspace: http://hdl.han

  14. Verspanen van moeilijk bewerkbare materialen

    NARCIS (Netherlands)

    Hoogstrate, A.M.; Oosterling, J.A.J.

    2011-01-01

    Hier vindt u het boek over het verspanen van moeilijk bewerkbare materialen. Het is het resultaat van het TNO kennisoverdrachtproject “Verspanen van moeilijk bewerkbare materialen” Het bevat zowel achtergrondkennis als praktisch toepasbare richtlijnen en gegevens. Het is een introductie in dit onder

  15. Invloed van sport op speeksel

    NARCIS (Netherlands)

    G.J.H. Bruins; A. Vissink; E.C.I. Veerman; A. van Nieuw Amerongen

    2008-01-01

    Fysieke belasting zoals sportbeoefening kan van invloed zijn op de secretie en de samenstelling van speeksel. Bij intensieve lichamelijke inspanning daalt de concentratie van immunoglobulinen in speeksel, nemen de eiwitconcentratie - de output aan eiwitten (mg/min) blijft echter gelijk - en de visco

  16. Onverwachte gevolgen van endometriumablatie

    NARCIS (Netherlands)

    Voogd, I. de; Lagro-Janssen, A.L.M.

    2016-01-01

    Endometriumablatie kan uitkomst bieden voor vrouwen met hevig menstrueel bloedverlies bij wie medicamenteuze behandeling of een hormoonhoudend spiraaltje (LNG-IUD) onvoldoende effect oplevert. De nieuwste soort ablatiebehandeling, Novasure®, vindt plaats in 90% van de ziekenhuizen in Nederland. Bij

  17. Segments of van Gogh.

    Science.gov (United States)

    Mannlein, Sally

    2002-01-01

    Describes an art project that was used with first grade students in which they learn about Vincent van Gogh's style of painting. Explains that the children learn to create circles and straight lines and how to fill in with color. (CMK)

  18. Van Gogh's Sunflowers

    Science.gov (United States)

    Daddino, Michelle

    2010-01-01

    In this article, the author describes an art project wherein kindergarten students painted sunflowers. These beautiful and colorful sunflowers were inspired by the book "Camille and the Sunflowers" by Laurence Anholt, which does an amazing job of introducing young children to the art and life of Vincent van Gogh.

  19. Remembering Van Gogh.

    Science.gov (United States)

    Freifeld, Susan

    1999-01-01

    Describes an activity in which fourth grade students created a three-dimensional representation of Vincent Van Gogh's room in Arles (France). Expounds that the students had to invent their own strategies for three-dimensional construction and two-dimensional embellishment. Provides directions for creating the room and bed. (CMK)

  20. Van Bahrein tot Bitcoin

    NARCIS (Netherlands)

    Lodder, A.R.

    2014-01-01

    Door het internet kan de burger rechtstreeks contact krijgen met zijn publiek zonder hulp van derden als omroepen, kranten, uitgevers, muziekindustrie, etc. Bij al deze communicaties is prominent (Youtube) of minder prominent (Wordpress) een derde partij betrokken die de communicatie faciliteert. De

  1. Bacteriologisch Onderzoek van slachtdieren

    NARCIS (Netherlands)

    Engel HWB; van Leusden FM; Erne EHW

    1986-01-01

    Door zes vleeskeuringsdiensten en het RIVM werd gezamenlijk onderzoek verricht naar het in de Vleeskeuringswet omschreven "Bacteriologisch Onderzoek" (BO) bij slachtdieren. Doel was na te gaan of er verschillen zouden zijn in de aantallen positieve resultaten van het BO tussen de diensten

  2. Van Bahrein tot Bitcoin

    NARCIS (Netherlands)

    Lodder, A.R.

    2014-01-01

    Door het internet kan de burger rechtstreeks contact krijgen met zijn publiek zonder hulp van derden als omroepen, kranten, uitgevers, muziekindustrie, etc. Bij al deze communicaties is prominent (Youtube) of minder prominent (Wordpress) een derde partij betrokken die de communicatie faciliteert. De

  3. Zwartverkleuring van zandsteen

    NARCIS (Netherlands)

    Nijland, T.G.; Dubelaar, C.W.; Hees, R.P.J. van; Linden, T.J.M. van der

    2002-01-01

    Zwart- of grijsverkleuring van zandsteen in monumenten is een wijdverspreid fenomeen (Fig. 1). Sommige objecten danken er zelfs hun naam aan, denk aan de Porta Nigra in Trier. Deze zwartverkleuring, vaak aangeduid met de verwarrende en daarom ongelukkige term 'patina', wordt door velen ervaren als

  4. Het rendement van geluk

    NARCIS (Netherlands)

    Keijsers, J.; Jansen, M.; Ruland, E.

    2016-01-01

    Plaatste je twintig jaar geleden een zonnepaneel op je dak of deelde je de auto met de buren, dan behoorde je al snel tot de uitzonderingen in de samenleving, die elke vorm van financieel gewin de rug leek toe te keren. Dat maatschappelijke betrokkenheid en rendement hand in hand kunnen gaan, is een

  5. Verbeteren eetkwaliteit van stierenvlees

    NARCIS (Netherlands)

    Os, van M.; Heeres-van der Tol, J.J.; Kranen, R.W.; Eikelenboom, G.

    2001-01-01

    Deze eisen zullen de uniformiteit verbeteren, maar wat het effect is van deze factoren op de eetkwaliteit is echter minder bekend. Om hier inzicht in te krijgen heeft het Praktijkonderzoek Veehouderij in samenwerking met het ID-Lelystad een onderzoek uitgevoerd.

  6. Pythagoras Meets Van Hiele.

    Science.gov (United States)

    Flores, Alfinio

    1993-01-01

    Develops the Pythagorean Theorem in the context of the Van Hiele levels by presenting activities appropriate for each level. Activities point to preparatory development (level 0), give 3 different versions of Euclid's proof (levels 1, 2, and 3), give some generalizations of the theorem (level 3), and explore the Pythagorean relationship in other…

  7. Van profijtbeginsel naar rendementsdenken

    NARCIS (Netherlands)

    Gelderen, A.J.S. van

    2015-01-01

    Het ‘rendementsdenken’ is een ongelukkige verzamelnaam voor allerlei kwalen in het huidige hoger onderwijs. Verschillende vormen van rendement worden op een hoop gegooid en er gebeurt juist veel in het hoger onderwijs dat het ‘rendement’, óók het financiële rendement, juist niet ten goede komt. Dat

  8. Het importeren van honingbijen

    NARCIS (Netherlands)

    Cornelissen, B.

    2007-01-01

    Er wordt in de wereld volop gehandeld in bijen en bijenproducten. De globalisering is niet aan de bijenteelt voorbij gegaan. Producten als honing en propolis, maar ook raszuivere koninginnen worden over heel de wereld gemaakt en verspreid. Met deze wereldwijde verplaatsing van bijen kunnen ook aller

  9. Het importeren van honingbijen

    NARCIS (Netherlands)

    Cornelissen, B.

    2007-01-01

    Er wordt in de wereld volop gehandeld in bijen en bijenproducten. De globalisering is niet aan de bijenteelt voorbij gegaan. Producten als honing en propolis, maar ook raszuivere koninginnen worden over heel de wereld gemaakt en verspreid. Met deze wereldwijde verplaatsing van bijen kunnen ook

  10. Beschikbaarheid van biociden

    NARCIS (Netherlands)

    van der Grinten E; SEC; mev

    2012-01-01

    Beschikbaarheid van biociden:
    Biociden zijn middelen die de industrie en huishoudens gebruiken om schadelijke organismen te bestrijden. Biociden doorlopen een risicoanalyse voordat ze op de markt worden toegelaten. In 2009 is een handhavingsbeleid op niet-toegelaten middelen gestart. Middel

  11. Van Bahrein tot Bitcoin

    NARCIS (Netherlands)

    Lodder, A.R.

    2014-01-01

    Door het internet kan de burger rechtstreeks contact krijgen met zijn publiek zonder hulp van derden als omroepen, kranten, uitgevers, muziekindustrie, etc. Bij al deze communicaties is prominent (Youtube) of minder prominent (Wordpress) een derde partij betrokken die de communicatie faciliteert.

  12. An Unexpected Near Term Pregnancy in a Rudimentary Uterine Horn

    Directory of Open Access Journals (Sweden)

    Elisabete Gonçalves

    2013-01-01

    Full Text Available Unicornuate uterus occurs due to a complete or partial nondevelopment of one Mullerian duct; sometimes it is associated with a rudimentary horn, which can communicate or not with uterine cavity or contain functional endometrium. Pregnancy in a rudimentary horn is rare and the outcome almost always unfavorable, usually ending in rupture during the first or second trimester with significant morbidity and mortality. Despite the availability and advances on imagiologic procedures, recognition of this ectopic pregnancy is frequently made at laparotomy after abdominal pain and collapse. The authors describe a case of a primigravida with 34 weeks of gestation admitted with a preeclampsia with severity criteria. A cesarean for fetal malpresentation was done and, unexpectedly, a rudimentary horn pregnancy was found with a live newborn. In the literature, few reports of a horn pregnancy reaching the viability with a live newborn are described, enhancing the clinical importance of this case. A review of literature concerning the epidemics, clinical presentation, and appropriate management of uterine horn pregnancies is made.

  13. Detection of outliers in reference distributions: performance of Horn's algorithm.

    Science.gov (United States)

    Solberg, Helge Erik; Lahti, Ari

    2005-12-01

    Medical laboratory reference data may be contaminated with outliers that should be eliminated before estimation of the reference interval. A statistical test for outliers has been proposed by Paul S. Horn and coworkers (Clin Chem 2001;47:2137-45). The algorithm operates in 2 steps: (a) mathematically transform the original data to approximate a gaussian distribution; and (b) establish detection limits (Tukey fences) based on the central part of the transformed distribution. We studied the specificity of Horn's test algorithm (probability of false detection of outliers), using Monte Carlo computer simulations performed on 13 types of probability distributions covering a wide range of positive and negative skewness. Distributions with 3% of the original observations replaced by random outliers were used to also examine the sensitivity of the test (probability of detection of true outliers). Three data transformations were used: the Box and Cox function (used in the original Horn's test), the Manly exponential function, and the John and Draper modulus function. For many of the probability distributions, the specificity of Horn's algorithm was rather poor compared with the theoretical expectation. The cause for such poor performance was at least partially related to remaining nongaussian kurtosis (peakedness). The sensitivity showed great variation, dependent on both the type of underlying distribution and the location of the outliers (upper and/or lower tail). Although Horn's algorithm undoubtedly is an improvement compared with older methods for outlier detection, reliable statistical identification of outliers in reference data remains a challenge.

  14. De Pretertiaire Historie van den Indischen Archipel

    NARCIS (Netherlands)

    Umbgrove, J.H.F.

    1935-01-01

    Aan de hand van een serie kaartjes wordt in deze studie gepoogd de ontwikkeling van den Indischen Archipel — verspreiding van land en zee, faciesgebieden, tijden van transgressies, plooiingsperiodes etc. — in pretertiairen tijd voor zoover mogelijk na te gaan. Bij het vermelden van feiten en van lit

  15. Van wie zijn zij? De ambtenaren

    NARCIS (Netherlands)

    Peters, Jit

    2011-01-01

    Aan de hand van actuele voorbeelden gaat Jit Peters tijdens zijn afscheidscollege in op de toegenomen macht van ambtenaren. De loyaliteit van de ambtenaar is volgens hem nu te veel gericht op het ondersteunen van de eigen minister. Als tegenwichten van de macht van de ambtenaar staat Peters stil bij

  16. Verkenning van het hydrologische systeem van de Utrechte Heuvelrug met behulp van het model TRINS

    NARCIS (Netherlands)

    Snelting; H.; Pastoors; M.J.H.

    1985-01-01

    Voor de identificatie van het geohydrologische systeem in het onderzoek van de Utrechtse Heuvelrug is een eindige elementen model voor niet- stationaire grondwaterstroming gebruikt (het model TRINS). Het gesimuleerde systeemgedrag moet uiteraard aan de werkelijkheid worden getoetst. Voor deze to

  17. University receives $1.4 million science education award from Howard Hughes Medical Institute to support innovate undergraduate science education

    OpenAIRE

    Owczarski, Mark

    2010-01-01

    Virginia Tech was among 50 top research universities nationwide to receive a Precollege and Undergraduate Science Education Program award from the Howard Hughes Medical Institute (HHMI) that will be used to encourage university faculty to develop new ways to teach and inspire undergraduate students about science and research.

  18. Pretext, Context, Subtext: Textual Power in the Writing of Langston Hughes, Richard Wright, and Martin Luther King, Jr.

    Science.gov (United States)

    Bogumil, Mary L.; Molino, Michael R.

    1990-01-01

    Studies verbal pretexts, social subtexts, and interpretive contexts of works by Langston Hughes, Richard Wright, and Martin Luther King, Jr. Notes that cultural repression is propagated (and dispelled) in part through the power of language. Notes that these texts are relevant for teaching textual power in hopes of affecting social change. (RS)

  19. Theoretical analysis and control results for the FitzHugh-Nagumo equation

    Directory of Open Access Journals (Sweden)

    Marko Antonio Rojas-Medar

    2008-12-01

    Full Text Available In this paper we are concerned with some theoretical questions for the FitzHugh-Nagumo equation. First, we recall the system, we briefly explain the meaning of the variables and we present a simple proof of the existence and uniqueness of strong solution. We also consider an optimal control problem for this system. In this context, the goal is to determine how can we act on the system in order to get good properties. We prove the existence of optimal state-control pairs and, as an application of the Dubovitski-Milyoutin formalism, we deduce the corresponding optimality system. We also connect the optimal control problem with a controllability question and we construct a sequence of controls that produce solutions that converge strongly to desired states. This provides a strategy to make the system behave as desired. Finally, we present some open questions related to the control of this equation.

  20. The synchronization of FitzHugh-Nagumo neuron network coupled by gap junction

    Institute of Scientific and Technical Information of China (English)

    Zhan Yong; Zhang Su-Hua; Zhao Tong-Jun; An Hai-Long; Zhang Zhen-Dong; Han Ying-Rong; Liu Hui; Zhang Yu-Hong

    2008-01-01

    It is well known that the strong coupling can synchronize a network of nonlinear oscillators. Synchronization provides the basis of the remarkable computational performance of the brain. In this paper the FitzHugh-Nagumo neuron network is constructed. The dependence of the synchronization on the coupling strength, the noise intensity and the size of the neuron network has been discussed. The results indicate that the coupling among neurons works to improve the synchronization, and noise increases the neuron random dynamics and the local fluctuations; the larger the size of network, the worse the synchronization. The dependence of the synchronization on the strength of the electric synapse coupling and chemical synapse coupling has also been discussed, which proves that electric synapse coupling can enhance the synchronization of the neuron network largely.

  1. A correspondence between the models of Hodgkin-Huxley and FitzHugh-Nagumo revisited

    Science.gov (United States)

    Postnikov, Eugene B.; Titkova, Olga V.

    2016-11-01

    We present the discussion on the possibility to scale the classical dimensionless FitzHugh-Nagumo model of neuronal self-sustained oscillations to the range of variables corresponding to the results, which are provided by the biophysically relevant reduced two-dimensional Hodgkin-Huxley equations (the Rinzel model). It is shown that there exists a relatively simple choice of affine transformation, which results in time-dependent solutions, which reproduce with a high accuracy the time course of the recovery variable and the sharp onsets (intervals of fast motions on a phase trajectories) of the voltage spikes. As for the latter, the reasons for unavoidable difference are discussed as well as a necessity of taking into account applied current values during such a scaling procedure.

  2. Stochastic bifurcation in FitzHugh Nagumo ensembles subjected to additive and/or multiplicative noises

    Science.gov (United States)

    Hasegawa, Hideo

    2008-02-01

    We have studied the dynamical properties of finite N-unit FitzHugh-Nagumo (FN) ensembles subjected to additive and/or multiplicative noises, reformulating the augmented moment method (AMM) with the Fokker-Planck equation (FPE) method [H. Hasegawa, J. Phys. Soc. Japan 75 (2006) 033001]. In the AMM, original 2N-dimensional stochastic equations are transformed to eight-dimensional deterministic ones, and the dynamics is described in terms of averages and fluctuations of local and global variables. The stochastic bifurcation is discussed by a linear stability analysis of the deterministic AMM equations. The bifurcation transition diagram of multiplicative noise is rather different from that of additive noise: the former has the wider oscillating region than the latter. The synchronization in globally-coupled FN ensembles is also investigated. Results of the AMM are in good agreement with those of direct simulations (DSs).

  3. Phase Propagations in a Coupled Oscillator-Excitor System of FitzHugh-Nagumo Models

    Institute of Scientific and Technical Information of China (English)

    ZHOU Lu-Qun; OUYANG Qi

    2006-01-01

    @@ A one-dimensional array of 2N + 1 automata with FitzHugh-Nagumo dynamics, in which one is set to be oscillatory and the others are excitable, is investigated with bi-directional interactions. We find that 1 : 1 rhythm propagation in the array depends on the appropriate couple strength and the excitability of the system. On the two sides of the 1: 1 rhythm area in parameter space, two different kinds of dynamical behaviour of the pacemaker, i.e. phase-locking phenomena and canard-like phenomena, are shown. The latter is found in company with chaotic pattern and period doubling bifurcation. When the coupling strength is larger than a critical value,the whole system ends to a steady state.

  4. Fitz-Hugh-Curtis syndrome lacking typical characteristics of pelvic inflammatory disease.

    Science.gov (United States)

    Mitaka, Hayato; Kitazono, Hidetaka; Deshpande, Gautam A; Hiraoka, Eiji

    2016-06-22

    A 23-year-old Japanese woman, previously a commercial sex worker, presented with a 2-day history of right upper quadrant (RUQ) abdominal pain, worse on deep inspiration. She had noticed increased vaginal discharge 2 months earlier and had developed dull, lower abdominal pain 3 weeks prior to presentation. Although pelvic examination and transvaginal ultrasonography revealed neither a tubal nor ovarian pathology, abdominal CT scan with contrast demonstrated early enhancement of the hepatic capsule, a finding pathognomonic for Fitz-Hugh-Curtis syndrome (FHCS). Cervical discharge PCR assay confirmed Chlamydia trachomatis infection. This case highlights that normal gynaecological evaluation may be insufficient to rule out FHCS, for which physicians should have a high index of suspicion when seeing any woman of reproductive age with RUQ pain. 2016 BMJ Publishing Group Ltd.

  5. Identification of the FitzHugh-Nagumo Model Dynamics via Deterministic Learning

    Science.gov (United States)

    Dong, Xunde; Wang, Cong

    In this paper, a new method is proposed for the identification of the FitzHugh-Nagumo (FHN) model dynamics via deterministic learning. The FHN model is a classic and simple model for studying spiral waves in excitable media, such as the cardiac tissue, biological neural networks. Firstly, the FHN model described by partial differential equations (PDEs) is transformed into a set of ordinary differential equations (ODEs) by using finite difference method. Secondly, the dynamics of the ODEs is identified using the deterministic learning theory. It is shown that, for the spiral waves generated by the FHN model, the dynamics underlying the recurrent trajectory corresponding to any spatial point can be accurately identified by using the proposed approach. Numerical experiments are included to demonstrate the effectiveness of the proposed method.

  6. The African-American grandmother in autobiographical works by Frederick Douglass, Langston Hughes, and Maya Angelou.

    Science.gov (United States)

    Hill-Lubin, M A

    1991-01-01

    Using the autobiographies of Frederick Douglass, Langston Hughes, and Maya Angelou, this article demonstrates that the portrait of the African-American grandmother is one of action, involvement, hope, and dignity. In examining the works, we observe her functioning in three areas: as the preserver and most tenacious survivor of the African extended family; second, as repository and distributor of the family history, wisdom, and black lore; this role places her at the foundation of the Black, oral and written, literary and creative traditions; and third, as the retainer and transmitter of values and ideals that support and enhance her humanity, her family, and her community. This function emphasizes her spirituality. It is suggested that the grandmother, having played an important role in the growth, development, and artistic flowering of the autobiographer, can become a model and source of empowerment for future generations.

  7. De rol van professionals bij schulden van jongeren. Voorkomen van schulden bij jongeren

    NARCIS (Netherlands)

    Pim van Heijst; Stijn Verhagen; Kitty Jurrius

    2010-01-01

    In het praktijkgerichte onderzoek dat we de afgelopen drie jaar vanuit het lectoraat Participatie en Maatschappelijke Ontwikkeling(PMO) van de Hogeschool Utrecht hebben gedaan, heeft de rol van professionals bij het voorkomen van schulden bij jongeren centraal gestaan. Naast overige actoren als

  8. Effecten van preventie. Deelrapport van de VTV 2010 Van gezond naar beter

    NARCIS (Netherlands)

    van den Berg M; Schoemaker CG; VTV; PZO; vz

    2010-01-01

    'Effecten van preventie' is het deelrapport van de Volksgezondheid Toekomst Verkenning 2010 over de effectiviteit van preventieve maatregelen en interventies. Sinds de Preventienota 'Kiezen voor gezond leven' uit 2006 hanteert de overheid in het preventiebeleid een vijftal speer

  9. Het monitoren van kwantiteit en kwaliteit van afvalwater van pangasiusvijvers in Vietnam

    NARCIS (Netherlands)

    Heijden, van der P.G.M.; Poelman, M.; Bosma, R.

    2011-01-01

    In 2010 hebben twee Vietnamese onderzoeksinstituten onder begeleiding van Wageningen UR het inkomende water en het water dat de vijvers van vier pangasiuskwekerijen verlaat, maandelijks bemonsterd en de gemonitord. Doel was om een simpele methode te vinden om hoeveelheid en kwaliteit van het afvalwa

  10. Vonken van Vernieuwing : een voorbeeld van vernieuwing van binnenuit in een lerarenopleiding

    NARCIS (Netherlands)

    Thölke, Jürg

    2010-01-01

    Het lectoraat innovatie van leren in organisaties aan de HAN bestaat uit een kerngroep van professionals met verschillende achtergronden. Wij richten ons in brede zin op de ontwikkeling van mens en organisatie. Hierin experimenteren wij met systemische werkvormen in het onderwijs, organisatieadvies,

  11. Eerste inventarisatie van de effecten van licht op het welzijn van (gezelschaps)dieren

    NARCIS (Netherlands)

    Bracke, M.B.M.; Wolthuis-Fillerup, M.

    2012-01-01

    Dit rapport geeft een eerste inventarisatie naar de effecten van licht op het welzijn van (gezelschaps)dieren. Aanleiding is het ontwerp Besluit Gezelschapsdieren waarin het algemene doelvoorschrift is opgenomen dat het licht moet voldoen aan de ethologische en fysiologische behoeften van de dieren.

  12. Eerste inventarisatie van de effecten van licht op het welzijn van (gezelschaps)dieren

    NARCIS (Netherlands)

    Bracke, M.B.M.; Wolthuis-Fillerup, M.

    2012-01-01

    Dit rapport geeft een eerste inventarisatie naar de effecten van licht op het welzijn van (gezelschaps)dieren. Aanleiding is het ontwerp Besluit Gezelschapsdieren waarin het algemene doelvoorschrift is opgenomen dat het licht moet voldoen aan de ethologische en fysiologische behoeften van de dieren.

  13. Kwaliteit van het stofbaden van leghennen, in de strooiselbak van de welzijnskooi

    NARCIS (Netherlands)

    Rooijen, van J.

    1998-01-01

    Het stofbaden van bruine leghennen (Isabrown) in de strooiselbak van de welzijnskooi is onderzocht. Een welzijnskooi is een grote kooi voor ongeveer 40 leghennen met een legnest, zitstokken en een strooiselbak om in te stofbaden. Welzijnskooien wordenontwikkeld om het welzijn van leghennen te

  14. Toepassing van grasstroken in laanbomen : optimaliseren van de groei laanbomen bij toepassing van grasstroken

    NARCIS (Netherlands)

    Sluis, van der B.J.

    2014-01-01

    In de teelt van laanbomen worden, met name op de zandgronden, op grote schaal grasstroken toegepast. In de teelt van laanbomen op kleigronden is dit nog zeer beperkt. Onder de kwekers neemt de belangstelling voor deze toepassing steeds meer toe, maar de voor- en nadelen van grasstroken zijn steeds o

  15. De statuur van Jan van Riebeeck en de betekenis van de volksplanting.

    Directory of Open Access Journals (Sweden)

    A. A. van Schelven

    1952-03-01

    Full Text Available In 1927 heeft wijlen de Leidse professor Knappert een aantal, aan Joan van Riebeeck’s Dagverhaal ontleende mededelingen in dezer voege samengevat: „het is van Riebeeck gegaan als vele groten van ons geslachl; hij heeft ervaren, dat . . . deucht met ondeucht geloont wert.” Noch in Amsterdam noch in Batavia hadden de bureaucraten veel met de Kaap op.

  16. Bewaren van onbeworteld stek : bewaring van onbeworteld stek van aster en solidago

    NARCIS (Netherlands)

    Eveleens, B.; Krijger, D.; Kouwenhoven, D.; Berg, van den T.; Telgen, van H.J.

    2002-01-01

    In de praktijk worden geoogste stekken van Aster ericoides en Solidago maximaal een week bewaard. Bij langere bewaring (of transport) treden vaak problemen op als uitval ten gevolge van rot en/of slechte beworteling. Een langere bewaarduur is gewenst, zowel voor planning van werkzaamheden als behoud

  17. Foreign aid and extremism in the Horn of Africa

    DEFF Research Database (Denmark)

    Farah, Abdulkadir Osman

    2014-01-01

    This paper discusses foreign aid complexities and understanding the war on terrorism. In the past decade the US strategically integrated foreign aid with the fight against extremism, particularly in war torn regions like the Horn of Africa. In analysing the Somali case the paper contends the 911...... terror attacks inaugurated new form of foreign aid explicitly focusing on security. The “statelessness” condition in Somalia intensified intermingling of foreign aid with terrorism combatting programs in the Horn of Africa. In addition the collapse of the Somali military regime in 1991 empowered non...... claiming suspicious allegiance to the US gained momentum. In response extremists mobilized alternative partners and platforms. Consequently the declared war on terror had serious implications for the Horn of Africa. Foreign aid, external actors and extremism- the legacy of 911- made people in the region...

  18. Detecting flaws in Portland cement concrete using TEM horn antennae

    Science.gov (United States)

    Al-Qadi, Imad L.; Riad, Sedki M.; Su, Wansheng; Haddad, Rami H.

    1996-11-01

    To understand the dielectric properties of PCC and better correlate them with type and severity of PCC internal defects, a study was conducted to evaluate PCC complex permittivity and magnetic permeability over a wideband of frequencies using both time domain and frequency domain techniques. Three measuring devices were designed and fabricated: a parallel plate capacitor, a coaxial transmission line, and transverse electromagnetic (TEM) horn antennae. The TEM horn antenna covers the microwave frequencies. The measurement technique involves a time domain setup that was verified by a frequency domain measurement. Portland cement concrete slabs, 60 by 75 by 14 cm, were cast; defects include delamination, delamination filled with water, segregation, and chloride contamination. In this paper, measurements using the TEM horn antennae and the feasibility of detecting flaws at microwave frequency are presented.

  19. Invloed van minerale olie op de bestrijding van Phytophthora infestans in pootaardappelen

    NARCIS (Netherlands)

    Spits, H.G.; Bus, C.B.

    2003-01-01

    De invloed van toevoeging van olie aan een fungicide op de werking van het fungicide is afhankelijk van het gebruikte fungicide. Gezamenlijk spuiten van olie en Aviso DF, Curzate M en mogelijk ook Acrobat, verhoogt de curatieve werking van deze fungiciden. Gezamenlijk spuiten van olie en Aviso DF, l

  20. Holland Media Groep of Luxemburg Media Groep: de trouvaille van de Raad van State

    NARCIS (Netherlands)

    Gronden, J.W. van de

    2001-01-01

    In de introductie van haar annotatie bij de uitspraak van de Rechtbank merkt C. van Boxtel op dat deze uitspraak de voorlaatste ronde is van de langdurige strijd tussen het Commissariaat voor de Media en HMG. Uit de uitspraak van de Afdeling Bestuursrechtspraak van de Raad van State - in deze beeld

  1. [Gene expression profile of spinal ventral horn in ALS].

    Science.gov (United States)

    Yamamoto, Masahiko; Tanaka, Fumiaki; Sobue, Gen

    2007-10-01

    The causative pathomechanism of sporadic amyotrophic lateral sclerosis (ALS) is not clearly understood. Using microarray technology combined with laser-captured microdissection, gene expression profiles of degenerating spinal motor neurons as well as spinal ventral horn from autopsied patients with sporadic ALS were examined. Spinal motor neurons showed a distinct gene expression profile from the whole spinal ventral horn. Three percent of genes examined were significantly downregulated, and 1% were upregulated in motor neurons. In contrast with motor neurons, the total spinal ventral horn homogenates demonstrated 0.7% and 0.2% significant upregulation and downregulation of gene expression, respectively. Downregulated genes in motor neurons included those associated with cytoskeleton/axonal transport, transcription and cell surface antigens/receptors, such as dynactin 1 (DCTN1) and early growth response 3 (EGR3). In particular, DCTN1 was markedly downregulated in most residual motor neurons prior to the accumulation of pNF-H and ubiquitylated protein. Promoters for cell death pathway, death receptor 5 (DR5), cyclins C (CCNC) and A1 (CCNA), and caspases were upregulated, whereas cell death inhibitors, acetyl-CoA transporter (ACATN) and NF-kappaB (NFKB) were also upregulated. In terms of spinal ventral horn, the expression of genes related to cell surface antigens/receptors, transcription and cell adhesion/ECM were increased. The gene expression resulting in neurodegenerative and neuroprotective changes were both present in spinal motor neurons and ventral horn. Moreover, Inflammation-related genes, such as belonging to the cytokine family were not, however, significantly upregulated in either motor neurons or ventral horn. The sequence of motor neuron-specific gene expression changes from early DCTN1 downregulation to late CCNC upregulation in sporadic ALS can provide direct information on the genes leading to neurodegeneration and neuronal death, and are helpful

  2. Werkafwesigheid: 'n Studie van vragmotorbestuurders

    Directory of Open Access Journals (Sweden)

    J. S. Gouws

    1995-06-01

    Full Text Available Absenteeism: A study of truck drivers. The aim of the study was to explore reasons for absenteeism as experienced by code 11 truck drivers. Two groups were identified: one group high, and the other group low on an absenteeism continuum. Significant differences between the groups ocurred with respect to four of the sixteen personality factors of the Sixteen Personality Factor Questionnaire. However, no significant difference in their personal values and intellectual ability could be found. Opsomming Die doel van die studie was die identifisering van aanduiders van werkafwesigheid by kode 11 vragmotorbestuurders. Die bevinding van hierdie studie is dat daar beduidende verskille tussen werkafwesige en werkaanwesige vragmotorbestuurders ten opsigte van vier van die sestien persoonlikheidsfaktore van die Sestien Persoonlik- heidsfaktorvraelys bestaan. Daar blyk egter geen beduidende verskille betreffende hulle persoonlike waardes en intellektuele vermoens te wees nie.

  3. Preliminary AD-Horn Thermomechanical and Electrodynamic Simulations

    CERN Document Server

    AUTHOR|(CDS)2095747; Horvath, David; Calviani, Marco

    2016-01-01

    As part of the Antiproton Decelerator (AD) target area consolidation activities planned for LS2, it has been necessary to perform a comprehensive study of the thermo-structural behaviour of the AD magnetic horn during operation, in order to detail specific requirements for the upgrade projects and testing procedures. The present work illustrates the preliminary results of the finite element analysis carried out to evaluate the thermal and structural behaviour of the device, as well as the methodology used to model and solve the thermomechanical and electrodynamic simulations performed in the AD magnetic horn.

  4. Bursting deep dorsal horn neurons: The pharmacological target for the anti-spastic effects of Zolmitriptan?

    DEFF Research Database (Denmark)

    Rasmussen, Rune; Carlsen, Eva Maria Meier

    2016-01-01

    In a recent publication, Thaweerattanasinp and colleagues investigated spinal cord injury and firing properties of deep dorsal horn neurons during NMDA or Zolmitriptan application by employing electrophysiology in an in vitro spinal cord preparation. Deep dorsal horn neurons were classified...

  5. Designs and Development of Multimode Horns for ASTRO-G/VSOP-2 Satellite

    Science.gov (United States)

    Ujihara, H.

    2009-08-01

    The antenna optics of VSOP-2 satellite require low cross polarization, and the volume of the receiver box is limited. Thus, instead of conventional corrugated horns, multimode horns were proposed and designed in order to reduce the axial length and weight of the horns but still compatible with a low cross polarization. These multimode horns were designed for three observational bands of VSOP-2 at 8GHz, 22GHz, 43GHz, all with about the same antenna illumination size. However, the ratio of waveguide and wavelength are slightly different. The 22GHz-horn was designed at first, and the other horns were arranged around it. The properties of the horns were improved by controlling the complex amplitude of higher modes and by fitting the beam width to the antenna optics. The BBM models of horns were tested, and their measured beam patterns agree well with numerical simulations.

  6. Die gebruik van parallelplaatreologie vir die bepaling van die intrinsieke viskositeit van poli-etileentereftalaat

    Directory of Open Access Journals (Sweden)

    O. C. Vorster

    2005-09-01

    Full Text Available Die bepaling van die intrinsieke viskositeit van poli-etileentereftalaat word bemoeilik deur die feit dat daar tans slegs twee metodes in gebruik is. In die eerste metode word die bepaling deur middel van oplossingsviskometrie gedoen, maar die toksisiteit van die oplosmiddel, asook die tydperk wat dit neem om die bepaling te doen, is ’n probleem. Die tweede metode word beperk deur die kompleksiteit en beskikbaarheid van die apparatuur in Suid-Afrika. In hierdie studie word ’n alternatiewe metode, gebaseer op parallelplaatreologie, voorgestel wat albei hierdie probleme oorkom en die resultate sodoende verkry, word vergelyk met dié wat met bestaande metodes verkry is.

  7. Controllability of arc jet from arc horns with slits. Slit tsuki arc horn no arc jet seigyo tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Sunabe, K.; Inaba, T.; Fukagawa, H. (Central Research Institute of Electric Power Industry, Tokyo (Japan)); Kito, Y. (Nagoya University, Nagoya (Japan))

    1993-09-20

    To improve the corona discharge characteristics, test preparation was made of hollow rod form horns with slits for the overhead power transmission line use. Two types of horn electrode were prepared. The first horn electrode is of a hollow hemisphere fitted with and divided by slits on its tip. The second horn electrode is the first one which is further fitted with rod form electrode at the center of its tip. In experiment, relation was obtained between the deflection angle of arc jet and arc current, electrode diameter, etc., through an observation of arc jet by high speed camera. Melting loss of electrode was also made clear. The following knowledge was obtained: For the first horn electrode, the deflection angle can be limited to a narrow range by a division with slits, e.g., within 30 degrees under the condition of 5kA in arc current, 4 in number of sectors and 200mm in diameter. For the second horn electrode, the deflection angle can be limited to within 20 degrees under the condition of 5kA in arc current and 4 in number of sectors. The arc current is also limited to below 5kA by an addition of 50mm diameter central electrode. As a conclusion for the first electrode, the arc jet control characteristics excels in the stronger arc current range than 5kA, while for the second electrode, they are effective in the weaker arc current range than 5kA. 6 refs., 19 figs., 1 tab.

  8. Ellis-van Creveld

    Directory of Open Access Journals (Sweden)

    Dhandabani Jayaraj

    2012-01-01

    Full Text Available Ellis-van Creveld (EVC syndrome is an autosomal recessive disorder that is also known as chondro-ectodermal dysplasia. The common manifestations of this syndrome are short ribs, postaxial polydactyly, growth retardation, and ectodermal and cardiac defects. The present case report is about an 8-year-old boy who had the features of bilateral hexadactyly, knocked knees, cardiac problems, congenital absence of incisors, fused upper and lower labial frenulum, and mulberry molars.

  9. Electromagnetic van Kampen waves

    Energy Technology Data Exchange (ETDEWEB)

    Ignatov, A. M., E-mail: aign@fpl.gpi.ru [Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)

    2017-01-15

    The theory of van Kampen waves in plasma with an arbitrary anisotropic distribution function is developed. The obtained solutions are explicitly expressed in terms of the permittivity tensor. There are three types of perturbations, one of which is characterized by the frequency dependence on the wave vector, while for the other two, the dispersion relation is lacking. Solutions to the conjugate equations allowing one to solve the initial value problem are analyzed.

  10. Van Wyk Louw Simbolis?

    Directory of Open Access Journals (Sweden)

    F. I.J. van Rensburg

    1990-05-01

    Full Text Available In this article the question is posed whether one is justified in associating N.P. van Wyk Louw’s work with Symbolism as seen in terms of its being a historical art movement. At first sight some of the main characteristics of his work seem incompatible with the overall spirit of Symbolism. A close look is taken at these characteristics. They are weighed against typical characteristics of Symbolism. A number of common traits are discovered. Following this, a study of Van Wyk Louw’s utterances in his prose works is undertaken to establish the extent of his knowledge of the works of Symbolists and of Symbolism as such, The unfolding history of his contact with their work and with Symbolism is traced. Some revealing relations are uncovered. Having established a number of definite Symbolist traits in his work, his poetical oeuvre is projected against the set of fundamental characteristics of Symbolism as a phenomenon identified by S. Dresden in his book Symbolisme (1980. Seen at against this background, the range of symbolist features in his work shows up clearly. The conclusion reached is that Van Wyk Louw so thoroughly absorbed those characteristics of Symbolism that corresponded with his own creative personality that they have blended almost imperceptibly with the rest of his oeuvre, thereby creating the impression that they are fully native to his work.

  11. 9 CFR 95.12 - Bones, horns, and hoofs; importations permitted subject to restrictions.

    Science.gov (United States)

    2010-01-01

    ... 9 Animals and Animal Products 1 2010-01-01 2010-01-01 false Bones, horns, and hoofs; importations... ENTRY INTO THE UNITED STATES § 95.12 Bones, horns, and hoofs; importations permitted subject to restrictions. Bones, horns, and hoofs offered for importation which do not meet the conditions or...

  12. 9 CFR 95.11 - Bones, horns, and hoofs for trophies or museums; disinfected hoofs.

    Science.gov (United States)

    2010-01-01

    ... 9 Animals and Animal Products 1 2010-01-01 2010-01-01 false Bones, horns, and hoofs for trophies..., OFFERED FOR ENTRY INTO THE UNITED STATES § 95.11 Bones, horns, and hoofs for trophies or museums; disinfected hoofs. (a) Clean, dry bones, horns, and hoofs, that are free from undried pieces of hide,...

  13. Die voorgeskiedenis van kwantumberekening

    Directory of Open Access Journals (Sweden)

    P. H. Potgieter

    2004-09-01

    Full Text Available

    Die hoofidees wat tans gestalte vind in die teorie en tegnologie van kwantumberekening is in die laat 1970’s en vroeg 1980’s deur fisici in die Weste en ’n wiskundige in die voormalige Sowjetunie neergelˆ e. Dat di´ e teorie ook wortels in die Russiestalige vakliteratuur het, is nie algemeen bekend in die Weste nie. Daar word kortliks gekyk na die idee soos deur Benioff en (veral Feynman in die Weste versprei, asook die voorstel van di´ e rekengrondslag deur Manin in die Russiese literatuur. Die outeur hoop om hiermee so ’n onpartydig moontlike sintese van die vroe ¨ e gedagtegeskiedenis rondom kwantumberekening aan te bied. Die rol van omkeerbare en onomkeerbare berekeningsprosesse word vlugtig bekyk soos dit verband hou met die ontstaan van kwantumberekening, asook die sogenaamde Inligtingsparadoks in die fisika. Die inligtingsteorie en die fisika het heelwat met mekaar te kommunikeer, soos hierdie paradoks uitwys.

    Abstract

    The pre-history of quantum computation

    The main ideas behind developments in the theory and technology of quantum computation were formulated in the late 1970s and early 1980s by two physicists in the West and a mathematician in the former Soviet Union. It is not generally known in the West that the subject has roots in the Russian technical literature. The idea, as propagated by Benioff and (especially Feynman, is reviewed along with the proposition of a foundation for this kind of computation by Manin in the Russian literature. The author hopes to present as impartial a synthesis as possible of the early history of thought on this subject. The role of reversible and irreversible computational processes will be examined briefly as it relates to the origins of quantum computing and the so-called Information Paradox in physics. Information theory and physics, as this paradox shows, have much to communicate to each other.

  14. Onderzoek naar de affecten van de aanleg van damwanden en grondverdichting op tandwalvissen in het Dolfinarium Harderwijk

    NARCIS (Netherlands)

    Haan, de D.

    2013-01-01

    Voor het vaststellen van de effecten van de aanleg van damwandinstallaties en grondverdichting als onderdelen van het grootschalig bouwplan Waterfront Harderwijk van de gemeente Harderwijk werden op vijf verschillende locaties van het bouwplan installaties gesimuleerd en de geluidseffecten daarvan i

  15. Wind Farm Wake: The Horns Rev Photo Case

    DEFF Research Database (Denmark)

    Hasager, Charlotte Bay; Rasmussen, Leif; Peña, Alfredo

    2013-01-01

    The aim of the paper is to examine the nowadays well-known wind farm wake photographs taken on 12 February 2008 at the offshore Horns Rev 1 wind farm. The meteorological conditions are described from observations from several satellite sensors quantifying clouds, surface wind vectors and sea...

  16. Littoral Encounters : The Shore as Cultural Interface in King Horn

    NARCIS (Netherlands)

    Sobecki, Sebastian

    2006-01-01

    1. III * Later Medieval: Excluding Chaucer -- Brown et al., 10.1093 ... ... between the Saracens and the londisse men allied to the protagonist (' Littoral Encounters: the Shore as Cultural Interface in King Horn', Al-Mas a ... www.ywes.oxfordjournals.org/cgi/content/full/man0092 2.Murray, Alan V. “

  17. Wind Farm Wake: The 2016 Horns Rev Photo Case

    DEFF Research Database (Denmark)

    Hasager, Charlotte Bay; Nygaard, Nicolai Gayle; Volker, Patrick

    2017-01-01

    Offshore wind farm wakes were observed and photographed in foggy conditions at Horns Rev 2 on 25 January 2016 at 12:45 UTC. These new images show highly contrasting conditions regarding the wind speed, turbulence intensity, atmospheric stability, weather conditions and wind farm wake development...

  18. Morphological character of crystalline components present in saiga horn.

    Science.gov (United States)

    Hashiguchi, K; Hashimoto, K; Akao, M

    2001-05-01

    The purpose of this study was to investigate the ultrastructure of saiga-antelope (Saiga tatarica) horn for proposing the mechanism of the initial mineralization. Horn is derived from horny tooth of Cyclostomata. The minerals in saiga horn were identified crystallographically using electron microscopy and X-ray diffraction techniques. Soft X-ray photographs revealed the degree of the mineralization pattern. However, the number of rings did not indicate the age of saiga. Mineral deposites were observed among well banded keratin fibers and composed of powder like crystals. This deposited crystals were found by the X-ray diffraction method to be octacalcium phospate (OCP) by comparing these periodic lattice fringes to JCPDS card data. The chemical formula of OCP is Ca8H2(PO4)6.5H2O. Evidences for the presence of OCP in mature hard tissues have never been obtained. This phenomenon described here may be characteristic of saiga horn because we have found no reports on this type of OCP mineralization in any other animal species. It is possible that OCP is the precursor in the initial mineralization step, indicating in a nucleation of mineral on the keratin fibers.

  19. Algebraicity of the Appell-Lauricella and Horn hypergeometric functions

    CERN Document Server

    Bod, Esther

    2010-01-01

    We extend Schwarz' list of irreducible algebraic Gauss functions to the four classes of Appell-Lauricella functions in several variables and the 14 complete Horn functions in two variables. This gives an example of a family of functions such that for any number of variables there are infinitely many algebraic functions, namely the Lauricella $F_C$ functions.

  20. Algebraicity of the Appell-Lauricella and Horn hypergeometric functions

    NARCIS (Netherlands)

    Bod, E.|info:eu-repo/dai/nl/325928983

    2011-01-01

    We extend Schwarz’ list of irreducible algebraic Gauss functions to the four classes of Appell-Lauricella functions in several variables and the 14 complete Horn functions in two variables. This gives an example of a family of functions such that for any number of variables there are infinitely many

  1. Phase-Center Extension for a Microwave Feed Horn

    Science.gov (United States)

    Hartop, R. W.; Manshadi, F.

    1987-01-01

    Corrugated cylindrical tube relocates phase center of Cassegrain antenna feed. Proposed modification increases aperture of Cassegrain antenna from 64 to 70 m. Relatively inexpensive extension moves phase center of feed without incurring cost of redesigning horn and relocating low-noise equipment. Extension does not affect polarization characteristics of feed.

  2. 163 COUNTER-TERRORISM IN THE GREATER HORN OF AFRICA ...

    African Journals Online (AJOL)

    Administrator

    2010-07-11

    Jul 11, 2010 ... serous signals to the defence and national security formations in the Greater Horn of ... provoke a state of terror in the general public, a group of persons or particular persons. ... others using the environment of the Somali collapsed state as a safe haven to ..... They don't know any other way of life but war.

  3. Rituele van plesier: Dolf van Coller se Die Bieliebalies

    Directory of Open Access Journals (Sweden)

    J. van Wyk

    1998-05-01

    Full Text Available Rituals of pleasure: Dolf van Coller’s Die Bieliebalies This article is an analysis of Dolf van Coller's Die Bieliebalies (1993, read as a hedonist text. It has many points of similarity with what Bakhtin (1984 called grotesque realism, and with Nietzsche’s views as expounded in The birth of tragedy (1956. By comparing Van Caller's text to that of Bakhtin and Nietzsche, a counter-discourse to contemporary moral discourses such as feminism is explored. Van Coller’s use of laughter as a relativising mechanism is very liberating in the context where petty morality intervenes dogmatically in the field of literature and other spheres of life.

  4. Hugh E. Huxley: cambiando el paradigma de la contracción muscular, desde dentro. [Hugh E. Huxley: changing from inside the paradigm of muscle contraction].

    Directory of Open Access Journals (Sweden)

    Adolfo Araci

    2014-04-01

    Full Text Available Desde un punto de vista físico se puede entender la fibra muscular como un motor, es decir, un sistema capaz de transformar la energía química en energía mecánica, que se utiliza para realizar un trabajo. Por lo tanto, para entender cómo ocurre dicho proceso de transformación es necesario conocer la ultraestructura de la fibra muscular. Esta es, sin duda, la principal aportación al acervo científico del recientemente fallecido Hugh Emor Huxley (1924-2013. Huxley se graduó en Física en el Christ’s College de Cambdrige, tras ver interrumpidos temporalmente sus estudios por su dedicación como operario de radar de la Royal Air Force entre 1943 y 1947, durante la Segunda Guerra Mundial (Pollard y Goldman, 2013; Spudich, 2013. Tras su graduación se incorporó como el primer estudiante de doctorado a una unidad de nueva creación del Medical Research Council, el “Laboratorio de Biología Molecular”, dirigida por Max Perutz y John Kendrew, siendo este último el director de sus tesis doctoral, que fue defendida en 1952 (Spudich, 2013. El uso de la técnicas de difracción de rayos X, que permitían el estudio en niveles de resolución inalcanzables con las técnicas microscópicas del momento, y su aplicación a la descripción de la ultraestructura muscular, fueron el objeto de su tesis doctoral, para el desarrollo de la cual diseñó y construyó sus propios instrumentos. El esclarecimiento de los aspectos estructurales implicados en la contracción muscular se convirtió desde entonces en la pregunta central de su biografía científica.

  5. Verspreide opstellen over de geschiedenis van Nederland

    OpenAIRE

    Huizinga, J.

    2007-01-01

    De bundel Verspreide opstellen over de geschiedenis van Nederland van Johan Huizinga is weliswaar uit een veelheid van bronnen samengesteld en de stukken stammen uit een periode van meer dan dertig jaren, maar zij laten bij de lezer een beeld van grote eenheid en samenhang achter. Of het nu gaat over de figuur van Willem van Oranje, over Leidens ontzet, over Hugo de Groot of over de invloed van Duitsland op de Nederlandse cultuur, Huizinga slaagt erin het nationale karakter van Nederland en o...

  6. Registratie van voedselinfecties en -vergiftigingen onderzocht door GGD's en Keuringsdiensten van waren, 1999

    NARCIS (Netherlands)

    van Duynhoven YTHP; de Wit MAS; CIE

    2000-01-01

    In deze rapportage worden de gegevens gepresenteerd van voedselinfecties en voedselvergiftigingen in Nederland in 1999. De resultaten zijn gebaseerd op meldingen door consumenten aan de Keuringsdienst van Waren, op standaard rapportages van onderzochte explosies van voedselinfecties en -vergiftigin

  7. Bepaling van enkele neurotransmitters, monoaminen, en metabolieten, met behulp van Continuous Flowapparatuur

    NARCIS (Netherlands)

    Eigeman L; Schonewille F; Borst M; van der Laan JW

    1986-01-01

    Bij het onderzoek in de psychofarmacologie kan kennis van de effecten van stoffen op de omzettingssnelheid van neurotransmitters een belangrijk aspect zijn. Met de huidige psychofarmaca lijken vooral de klassieke neurotransmitters zoals de monoaminen, noradrenaline, dopamine en serotonine van

  8. Achtergrondbelasting van het oppervlaktewater met zware metalen ten gevolge van uitspoeling uit de bodem

    NARCIS (Netherlands)

    Bonten, L.T.C.; Grift, B.; Klein, J.

    2007-01-01

    Uitspoeling van van nature in de bodem aanwezige metalen leiden tot een belasting van het oppervlaktewater. Modelberekeningen zijn uitgevoerd om deze achtergrondbelasting te schatten. Deze modelberekeningen zijn gebaseerd op schattingen van achtergrondgehaltes in de bodem voor de bovengrond en ondie

  9. Kwaliteit van de keuring en belasting van keurmeesters bij de pluimveekeuring

    NARCIS (Netherlands)

    Veerkamp, C.H.; Vries, de A.W.; Zegers, D.H.A.

    1989-01-01

    Onderzoek werd verricht aan 3 verschillende systemen van pluimveekeuring, waarbij is gelet op alle condities die van belang kunnen zijn voor de kwaliteit van de keuring en de belasting van de pluimveekeurmeesters

  10. Onderscheid tussen temporomandibulaire pijn en andere vormen van orofaciale pijn op basis van een vragenlijst

    NARCIS (Netherlands)

    Bonn, C.E.H.M.; van Selms, M.K.A.; te Poel, F.; Visscher, C.M.; Lobbezoo, F.; Naeije, M.

    2013-01-01

    Onderzocht werd of, los van de gebruikelijke instrumenten voor de diagnostiek van temporomandibulaire pijn, een vragenlijst onderscheid kan maken tussen temporomandibulaire pijn en andere vormen van chronische orofaciale pijn. Daarbij werd uitgegaan van het biopsychosociaal model. Er werden 509 pati

  11. Harbour porpoises on Horns Reef - Effects of the Horns Reef wind farm. Annual status report 2004

    Energy Technology Data Exchange (ETDEWEB)

    Tougaard, J.; Carstensen, J.; Wisz, M.S.; Teilmann, J.; Bech, N.I. [National Environmental Res. Inst., Roskilde (Denmark); Skov, H. [DHI - Water and Environment, Hoersholm (Denmark); Henriksen, Oluf, D. [DDH-Consulting A/S, Roskilde (Denmark)

    2005-07-15

    This report describes the monitoring of harbour porpoises at Horns Reef Offshore Wind Farm, Denmark, with emphasis on data collected in 2004. Three 2-day surveys with line transect observations of porpoises were conducted in 2004 and data from acoustic data loggers (TPODs) were collected from January through July. Although new data from 2004 was included in the analysis there were no significant additions to conclusions from previous years' reports. On the contrary, the general conclusions regarding effects of construction and operation of the wind farm on porpoise abundance inside and outside the wind farm area have been weakened somewhat compared to previous reports. The specific conclusions regarding short-time effects of construction activities (especially pile drivings) has not been changed, however. Modelling of the spatial distribution of porpoises in the area demonstrated very weak correlations with static environmental variables (water depth, change in water depth and distance to 6 m depth contour). This highlights the importance of dynamic environmental variables, in particular tide and salinity, in determining the fine-scale distribution of porpoises and their prey in the area. a strong correlation between tide and porpoise abundance observed in the T-POD data on some parts of the reef (high abundance at high tide, low at low tide) supports the importance of this variable. Tide and salinity will be included in a forthcoming analysis of the entire dataset from the monitoring program. (au)

  12. Harbour porpoises on Horns Reef - Effects of the Horns Reef wind farm. Annual status report 2003

    Energy Technology Data Exchange (ETDEWEB)

    Tougaard, J.; Carstensen, J.; Henriksen, Oluf. D.; Teilmann, J. [National Environmental Research Inst., Roskilde (Denmark); Rye Hansen, J. [DDH Consulting A/S, Roskilde (Denmark)

    2004-06-15

    Occurrence and distribution of harbour porpoises (Phocoena phocoena) in and around the off-shore wind farm on Horns Reef, Denmark, was investigated. This report describes data collected in 2003 as part of an ongoing monitoring program, covering a period before construction of the wind farm (baseline), the construction period in 2002 and one year following construction of the wind farm. Data from acoustic dataloggers (T-PODs) and visual surveys conducted from ships confirmed the presence of harbour porpoises inside the wind farm area during all periods investigated. Comparison with baseline data from 1999-2001 and with control areas outside the wind farm did not show a statistical significant change in sighting rates inside the wind farm area in the first year following construction relative to baseline. T-POD data showed a pronounced effect of the construction of the wind farm on the indicators 'encounter duration' (measure of how long porpoises remain close to the POD) and 'waiting time' (measure of time interval between porpoise encounters). Both parameters seem to indicate higher levels of porpoise activity during construction (encounter duration went up, waiting time went down) compared to baseline. A partial return to baseline levels was seen for these two indicators in 2003. (au)

  13. The Long-Time Behavior of Legendre Spectral Approximation to Fitz-Hugh-Nagumo Equation%Fitz-Hugh-Nagumo方程Legendre谱逼近的长时间性态

    Institute of Scientific and Technical Information of China (English)

    张伟斌

    2005-01-01

    利用Legendre谱方法对Fitz-Hugh-Nagumo方程在空间方向半离散,得到了其近似解的误差估计,并且证明了近似整体吸引子的存在性和上半连续性,从而为研究该方程的长时间行为提供了一个有效的算法.

  14. Optimalisatie bemesting Van Strien : voortgang 2013

    NARCIS (Netherlands)

    Hospers-Brands, A.J.T.M.; Strien, van J.

    2014-01-01

    Dit rapport bevat de resultaten van het derde jaar van het project “Bedrijfsinterne Optimalisatie”, en wel van het deelproject “Van Strien”. Op diverse percelen zijn metingen uitgevoerd aan de bodem om de stikstof werking van maaimeststoffen in beeld te krijgen.

  15. Electrospray ionisatie massaspectrometrie: Verkenning van het toepassingsgebied

    NARCIS (Netherlands)

    Heeft E van der; Hove GJ ten; Jong APJM de; LOC

    1996-01-01

    Betreft de resultaten van een studie naar de toepasbaarheid van electrospray ionisatie massaspectrometrie (ESI-MS). Er werd onderzoek verricht op het gebied van de eitwit- en peptide-analyse en de bepaling van polaire bestrijdingsmiddelen, macrolide antibiotica en metabolieten van polycyclische

  16. De syntaxis van de Italiaanse preposities

    NARCIS (Netherlands)

    Boer, M.G. de

    2010-01-01

    SAMENVATTING In dit hoofdstuk wordt een inventaris opgesteld van de Italiaanse preposities die voorkomen in een corpus bestaande uit de romans La Ciociara van Moravia en Il Gattopardo van Tomasi di Lampedusa. Achtergrond voor de herkenning van preposities is de Extended Standard Theory van de gener

  17. Een nieuwe vorm van E-voedingswetenschap

    NARCIS (Netherlands)

    Kersten, A.H.; Schrauwen, P.; Müller, M.R.

    2008-01-01

    De informatiemaatschappij zorgt voor een nieuwe vorm van voedingswetenschap op het gebied van nutrigenomics, Nutritional Science 2.0. Voor het vermeerderen van kennis op dit terrein is een vrije mondiale uitwisseling van data nodig die nog niet goed van de grond is gekomen

  18. De syntaxis van de Italiaanse preposities

    NARCIS (Netherlands)

    Boer, M.G. de

    2010-01-01

    SAMENVATTING In dit hoofdstuk wordt een inventaris opgesteld van de Italiaanse preposities die voorkomen in een corpus bestaande uit de romans La Ciociara van Moravia en Il Gattopardo van Tomasi di Lampedusa. Achtergrond voor de herkenning van preposities is de Extended Standard Theory van de

  19. Outsourcing van het ICT door overheidsinstellingen

    NARCIS (Netherlands)

    Kok, L.; Theeuwes, J.J.M.; Janssens, L.

    2003-01-01

    Het IWI heeft onlangs gewezen op de risico’s van outsourcing van ICT door het UWV. Ook het uitbesteden van ICT door gemeenten is niet zonder risico. Om outsourcingsbeslissingen van gemeenten en UWV te kunnen beoordelen wil het ministerie meer inzicht in de effecten van outsourcing. De directie

  20. Erkennen van een MOOC: een statusoverzicht

    NARCIS (Netherlands)

    Robert Schuwer

    2015-01-01

    Toekennen van studiepunten aan het succesvol volgen van een MOOC. Dit onderwerp is in de afgelopen jaren al meermalen aan bod gekomen bij discussies over mogelijke effecten van MOOC’s op het reguliere onderwijs. Medio 2014 verscheen een verkenning hierover van de NVAO (NVAO, 2014). Eén van de consta

  1. Kognitiewe en persoonlikheidskorrelate van aandaggewing

    Directory of Open Access Journals (Sweden)

    S. J. Vos

    1993-06-01

    Full Text Available Cognitive and personality correlates of attention. The principal aim of the study was to determine the cognitive and personality correlates of attention. Two contrasting groups were formed on the basis of scores from a self report inventory of attention. These two groups were compared in terms of the NSAG, the SAT, the 16PF and the JPQ. With the aid of the Hotelling T2 it was found that the vectors of means scores of the two contrasting groups differed statistically significantly from one another in respect of both the cognitive and personality variables. Opsomming Die hoofdoel van die studie was om die persoonlikheids- en kognitiewe korrelate van aandaggewing vas te stel. Twee kontrasterende groepe is saamgestel aan die hand van tellings op 'n selfverslaggewende vraelys oor aandaggewing. Hierdie twee groepe is met mekaar vergelyk ten opsigte van die NSAG, die SAT, die 16PF, en die JPV. Met behulp van Hotelling se T'toets is vasgestel dat die vektore van gemiddeldes van die twee groepe statistics beduidend van mekaar verskil ten opsigte van sowel die kognitiewe as die persoonlikheidsmetings.

  2. Carcinoma Buccal Mucosa Underlying a Giant Cutaneous Horn: A Case Report and Review of the Literature

    Directory of Open Access Journals (Sweden)

    Sunil Kumar

    2014-01-01

    Full Text Available Cutaneous horn is a conical, dense, and hyperkeratotic protrusion that often appears similar to the horn of an animal. Giant cutaneous horns are rare; no incidence or prevalence has been reported. The significance of cutaneous horns is that they occur in association with, or as a response to, a wide variety of underlying benign, premalignant, and malignant cutaneous diseases. A case of giant cutaneous horn of left oral commissure along with carcinoma left buccal mucosa is reported here as an extremely rare oral/perioral pathology.

  3. De volledigheidswaan van biografen

    Directory of Open Access Journals (Sweden)

    H. de Liagre Böhl

    2000-01-01

    Full Text Available A. Kuiper, Een wijze ging voorbij. Het leven van Abel J. Herzberg; L. van Driel, J. Noordegraaf, De Vries en Te Winkel. Een duografie; W. Hazeu, M.C. Escher. Een biografie; J.W. Renders, Zo meen ik dat ook jij bent. Biografie van Jan Hanlo; M. Derks, S. Verheesen-Stegeman, Wetenschap als roeping. Prof. dr. Christine Mohrmann (1903-1988, classica; F. Zwart, Willem Mengelberg (1871-1951. Een biografie 1871-1920The delusion that the scope of a biography is ever fully completeThis review article observes that, since the 1980s, the art of writing biographies has become fully accepted once more in academic circles in the Netherlands. This revival has been stimulated by positive collaborative efforts between historians and Dutch specialists. This harmony is based on their commitment to the principles of the Modem Biography, a style which counts since the first World War as the ‘ideal type’ of the whole genre. This style — which is mostly identified with Lytton Strachey’s Eminent Victorians (1918 - mediates between literature and historical studies. Their followers want to combine: 1. literary eloquence, 2. scholarly accuracy, 3. an analytic and a explicative concept about the personage and his or her work, 4. the skill of placing the character in the context of his or her time. Those four desiderata are used in this article as a point of departure for assessing six Dutch biographies that appeared in 1998. Some of them are excellent, however, all of them show a propensity towards empiricism and prolixity. Unfortunately this trait is characteristic of many recent biographies in The Netherlands

  4. De volledigheidswaan van biografen

    Directory of Open Access Journals (Sweden)

    H. de Liagre Böhl

    2000-01-01

    Full Text Available A. Kuiper, Een wijze ging voorbij. Het leven van Abel J. Herzberg; L. van Driel, J. Noordegraaf, De Vries en Te Winkel. Een duografie; W. Hazeu, M.C. Escher. Een biografie; J.W. Renders, Zo meen ik dat ook jij bent. Biografie van Jan Hanlo; M. Derks, S. Verheesen-Stegeman, Wetenschap als roeping. Prof. dr. Christine Mohrmann (1903-1988, classica; F. Zwart, Willem Mengelberg (1871-1951. Een biografie 1871-1920The delusion that the scope of a biography is ever fully completeThis review article observes that, since the 1980s, the art of writing biographies has become fully accepted once more in academic circles in the Netherlands. This revival has been stimulated by positive collaborative efforts between historians and Dutch specialists. This harmony is based on their commitment to the principles of the Modem Biography, a style which counts since the first World War as the ‘ideal type’ of the whole genre. This style — which is mostly identified with Lytton Strachey’s Eminent Victorians (1918 - mediates between literature and historical studies. Their followers want to combine: 1. literary eloquence, 2. scholarly accuracy, 3. an analytic and a explicative concept about the personage and his or her work, 4. the skill of placing the character in the context of his or her time. Those four desiderata are used in this article as a point of departure for assessing six Dutch biographies that appeared in 1998. Some of them are excellent, however, all of them show a propensity towards empiricism and prolixity. Unfortunately this trait is characteristic of many recent biographies in The Netherlands

  5. van der Waals torque

    Science.gov (United States)

    Esquivel-Sirvent, Raul; Schatz, George

    2014-03-01

    The theory of generalized van der Waals forces by Lifshtz when applied to optically anisotropic media predicts the existence of a torque. In this work we present a theoretical calculation of the van der Waals torque for two systems. First we consider two isotropic parallel plates where the anisotropy is induced using an external magnetic field. The anisotropy will in turn induce a torque. As a case study we consider III-IV semiconductors such as InSb that can support magneto plasmons. The calculations of the torque are done in the Voigt configuration, that occurs when the magnetic field is parallel to the surface of the slabs. The change in the dielectric function as the magnetic field increases has the effect of decreasing the van der Waals force and increasing the torque. Thus, the external magnetic field is used to tune both the force and torque. The second example we present is the use of the torque in the non retarded regime to align arrays of nano particle slabs. The torque is calculated within Barash and Ginzburg formalism in the nonretarded limit, and is quantified by the introduction of a Hamaker torque constant. Calculations are conducted between anisotropic slabs of materials including BaTiO3 and arrays of Ag nano particles. Depending on the shape and arrangement of the Ag nano particles the effective dielectric function of the array can be tuned as to make it more or less anisotropic. We show how this torque can be used in self assembly of arrays of nano particles. ref. R. Esquivel-Sirvent, G. C. Schatz, Phys. Chem C, 117, 5492 (2013). partial support from DGAPA-UNAM.

  6. Invloed van schermen en temperatuurbehandeling van het plantmateriaal op de groei en bloei van 3 freesia-rassen bij de teelt voor herfstbloei

    NARCIS (Netherlands)

    Doorduin, J.C.

    1983-01-01

    Onderzoek naar de invloed van verschil in lichtonderschepping door middel van schermen en de invloed van temperatuurbehandeling van het plantmateriaal op de groei, bloeitijdstip, kwaliteit en produktie van de freesiarassen Ballerina, Blue Heaven en Rosalinde

  7. Delcam立足中国再创辉煌--访Delcam公司总经理Hugh Humphreys

    Institute of Scientific and Technical Information of China (English)

    王崇民; 朱旭

    2004-01-01

    @@ 进入2004年以来,Delcam(中国)公司表现得非常活跃,在进行一系列人事调整之后,西安办事处正式挂牌,紧接着又将北京迪勒克斯科技发展有限公司纳入旗下,使其成为Delcam(中国)华北地区增值经销商,在签约仪式上,记者见到了专程从英国前来祝贺的Delcam PLC集团公司总经理HughHumphreys先生,开朗、风趣的HughHumphreys先生非常愉快地接受了本刊记者的采访.

  8. 2002 Report to Congress: Evaluating the Consensus Best Practices Developed through the Howard Hughes Medical Institute’s Collaborative Hazardous Waste Management Demonstration Project

    Science.gov (United States)

    This report discusses a collaborative project initiated by the Howard Hughes Medical Institute (HHMI) to establish and evaluate a performance-based approach to management of hazardous wastes in the laboratories of academic research institutions.

  9. Review on High Gain Conical Horn Antenna for Short-Range Communications

    Directory of Open Access Journals (Sweden)

    Priyanka Bhagwat

    2013-11-01

    Full Text Available Horn antennas are very popular at UHF (300 MHz-3 GHz and higher frequencies ( as high as 140 GHz. Horn antennas often have a directional radiation pattern with a high antenna gain, which can range up to 25 dB in some cases, with 10-20 dB being typical. Horn antennas have a wide impedance bandwidth, implying that the input impedance is slowly varying over a wide frequency range. The bandwidth for practical horn antennas can be of the order of 20:1 (for instance, operating from 1 GHz-20 GHz, with a 10:1 bandwidth being common. The gain of horn antennas often increases as the frequency of operation is increased. This is because the size of the horn aperture is measured in wavelengths; at higher frequencies the horn antenna is "electrically larger" because high frequency has a smaller wavelength. Horn antennas have very little loss, so the directivity of a horn is roughly equal to its gain. In this paper, we will present review about conical horn antenna which uses hybrid technique and provides high gain at frequencies ranging 3GHz keeping its size within limits. Also, literature survey will demostrate other reference papers will includes horn antennas using different techniques and used for various applications.

  10. Changes in horn size of Stone's sheep over four decades correlate with trophy hunting pressure.

    Science.gov (United States)

    Douhard, Mathieu; Festa-Bianchet, Marco; Pelletier, Fanie; Gaillard, Jean-michel; Bonenfanti, Christophe

    2016-01-01

    Selective harvest may lead to rapid evolutionary change. For large herbivores, trophy hunting removes males with large horns. That artificial selection, operating in opposition to sexual selection, can lead to undesirable consequences for management and conservation. There have been no comparisons of long-term changes in trophy size under contrasting harvest pressures. We analyzed horn measurements of Stone's rams (Ovis dalli stonei) harvested over 37 years in two large regions of British Columbia, Canada, with marked differences in hunting pressure to identify when selective hunting may cause a long-term decrease in horn growth. Under strong selective harvest, horn growth early in life and the number of males harvested declined by 12% and 45%, respectively, over the study period. Horn shape also changed over time: horn length became shorter for a given base circumference, likely because horn base is not a direct target of hunter selection. In contrast, under relatively lower hunting pressure, there were no detectable temporal trends in early horn growth, number of males harvested, or horn length relative to base circumference. Trophy hunting is an important recreational activity and can generate substantial revenues for conservation. By providing a reproductive advantage to males with smaller horns and reducing the availability of desirable trophies, however, excessive harvest may have the undesirable long-term consequences of reducing both the harvest and the horn size of rams. These consequences can be avoided by limiting offtake.

  11. Lumen - Gaia - Atlas : architectuur, kunst en tuinen van de gebouwen van de Environmental Sciences Group

    NARCIS (Netherlands)

    Windt, de R.; Londo, G.; Zaal, A.M.; Verstegen, T.; Ruyten, E.C.W.M.

    2010-01-01

    Boek ter gelegenheid van het afscheid van Hoogendooorn als bestuurslid van ESG, het onderdeel Groene Ruimte van Wageningen UR. Deze publicatie toont alle kunst binnen en buiten de drie gebouwen van ESG. Zo komen kunstuitingen bij elkaar, die eerder elders gestaan hebben (bij vroegere gebouwen van

  12. Huge van Bordeeus : een ridder van Karel de Grote op avontuur in het Oosten

    NARCIS (Netherlands)

    Lens, Maria Johanna

    2004-01-01

    'Huge van Bordeeus' is de dissertatie van Maria Lens. Hierin doet zij verslag van haar onderzoek naar de Middelnederlandse overlevering van een Franse tekst, 'Huon de Bordeaux', over de ridder Huge van Bordeeus. Deze veertiende-eeuwse ridder, leenman van Karel de Grote, moet de baard en vier tanden

  13. Aanwezigheid van ascosporen van Sclerotinia sclerotiorum binnen en buiten besmette percelen

    NARCIS (Netherlands)

    Lamers, J.G.; Wander, J.; Russchen, H.J.

    2012-01-01

    De aantasting van een gewas door Sclerotinia sclerotiorum hangt af van de aanwezigheid van ascosporen van deze schimmel in de lucht. In dit onderzoek dat gefinancierd wordt door PT en PA werd nagegaan in hoeverre de ascosporen van het eigen perceel afkomstig zijn of ook van een naburig perceel kunne

  14. Toepassing van ozon bij de bewaring van pootaardappelen

    NARCIS (Netherlands)

    Bus, C.B.; Veerman, A.

    2007-01-01

    In dit rapport wordt een onderzoek beschreven dat in een praktijkpootgoedbewaarplaats is uitgevoerd om te kijken naar de mogelijkheden van ontsmetting van pootgoed met ozongas. De knollen werden met een hoge concentratie ozon op de band behandeld tijdens het inschuren, met een lage concentratie cont

  15. Vorm en duur van thuiskraamzorg naar het oordeel van kraamvrouwen.

    NARCIS (Netherlands)

    Kerssens, J.J.

    1993-01-01

    De georganiseerde thuiskraamzorg is van groot belang in de Nederlandse verloskunde. Omdat de vraag naar kraamzorg het aanbod overtreft, is voldoende zorg echter niet meer overal beschikbaar. Steeds vaker worden minder uitgebreide vormen van kraamzorg geleverd en de gemiddelde verzorgingsduur voldoet

  16. Invloed van fosfaat op de strekkingsgroei van Kalanchoë

    NARCIS (Netherlands)

    Noort, van F.R.

    2010-01-01

    Hoewel door nieuwe compactere cultivars en door beter gebruik van groeiregulatoren het gebruik van groeiregulatoren is afgenomen, moet er nog steeds geremd worden om strekkingsgroei tegen te gaan en compacte Kalanchoës te telen. Vanuit diverse onderzoeken bij andere gewassen is bekend dat een

  17. Dutch Water Mining: Potentie van een zuiverend landschap van overvloed

    NARCIS (Netherlands)

    Os, van E.; Kruijs, A.; Bomas, B.; Poelman, M.; Pater, de M.; Bokhoven, van D.

    2012-01-01

    De blauwalg in het Volkerak - Zoommeer zorgt jaarlijks voor veel overlast. In de zomerperiode zijn giftig water en stank een hinderlijk fenomeen voor iedereen. Met de techniek Dutch Water Mining verdwijnt de overlast van blauwalgen. Voor de omliggende landbouwbedrijven ontstaat de zekerheid van een

  18. Betekenis van Legionella-soorten voor preventiebeleid van leidingwaterinstallaties

    NARCIS (Netherlands)

    Versteegh JFM; Brandsema PS; Lodder WJ; de Roda Husman AM; Schalk JAC; van der Aa NGFM; IMG; LZO; EPI

    2009-01-01

    Het RIVM adviseert om de huidige normstelling voor het preventiebeleid van Legionella te handhaven en niet uitsluitend op Legionella pneumophila te richten. Als andere Legionella-soorten worden aangetroffen kan er ook groei van Legionella pneumophila optreden. Als er dan geen maatregelen worden geno

  19. De invloed van bodemreiniging op de biologische beschikbaarheid van metalen

    NARCIS (Netherlands)

    Adema DMM*; Boer JLM de; Gestel CAM van; Jong P de*

    1987-01-01

    Er werd onderzoek uitgevoerd met als doel het uitlooggedrag en de biologische beschikbaarheid van metalen in verontreinigde gronden voor en na reiniging te bepalen. Dit (deel)rapport beschrijft de resultaten van het onderzoek naar de biologische beschikbaarheid. Op zes locaties in Nederland

  20. Opname en DNS strepieskodering van weekdiere en mosselkrewels van Robbeneiland

    Directory of Open Access Journals (Sweden)

    F.H. van der Bank

    2012-03-01

    Full Text Available Die Mollusca is die tweede grootste dierfilum. Dit sluit meer as 35 000 fossiel en 100 000 lewendespesies in. Die doel van hierdie studie was om ‘n opname te maak van die mosselkrewels, inheemse en uitlandse slakspesies op die eiland.

  1. Determinanten van de geneigdheid tot groupon-gebruik: toepassing van de theorie van gepland gedrag

    OpenAIRE

    Peeters, Andy

    2013-01-01

    In deze thesis wordt onderzocht welke factoren een invloed hebben op de Groupon proneness. Er wordt met andere woorden een onderzoek gedaan naar welke factoren er toe leiden dat mensen geneigd zijn om Groupon te gebruiken. De centrale onderzoeksvraag is: 'Welke factoren hebben een invloed op de geneigdheid om Groupon te gebruiken?' We gaan een antwoord geven op deze vraag aan de hand van de 'theorie van gepland gedrag', waarin we de theorie van de 'Big five' integreren. Vervolgens ...

  2. Micro-Horn Arrays for Ultrasonic Impedance Matching

    Science.gov (United States)

    Rao, Shanti; Palmer, Dean

    2009-01-01

    Thin-layered structures containing arrays of micromachined horns, denoted solid micro-horn arrays (SMIHAs), have been conceived as improved means of matching acoustic impedances between ultrasonic transducers and the media with which the transducers are required to exchange acoustic energy. Typically, ultrasonic transducers (e.g., those used in medical imaging) are piezoelectric or similar devices, which produce small displacements at large stresses. However, larger displacements at smaller stresses are required in the target media (e.g., human tissues) with which acoustic energy is to be exchanged. Heretofore, efficiencies in transmission of acoustic energy between ultrasonic transducers and target media have been severely limited because substantial mismatches of acoustic impedances have remained, even when coupling material layers have been interposed between the transducers and the target media. In contrast, SMIHAs can, in principle, be designed to effect more nearly complete acoustic impedance matching, leading to power transmission efficiencies of 90 percent or even greater. The SMIHA concept is based on extension, into the higher-frequency/ lower-wavelength ultrasonic range, of the use of horns to match acoustic impedances in the audible and lower-frequency ultrasonic ranges. In matching acoustic impedance in transmission from a higher-impedance acoustic source (e.g., a piezoelectric transducer) and a lowerimpedance target medium (e.g., air or human tissue), a horn acts as a mechanical amplifier. The shape and size of the horn can be optimized for matching acoustic impedance in a specified frequency range. A typical SMIHA would consist of a base plate, a face plate, and an array of horns that would constitute pillars that connect the two plates (see figure). In use, the base plate would be connected to an ultrasonic transducer and the face plate would be placed in contact with the target medium. As at lower frequencies, the sizes and shapes of the pillars

  3. New type of chimera structures in a ring of bistable FitzHugh-Nagumo oscillators with nonlocal interaction

    Science.gov (United States)

    Shepelev, I. A.; Vadivasova, T. E.; Bukh, A. V.; Strelkova, G. I.; Anishchenko, V. S.

    2017-04-01

    We study the spatiotemporal dynamics of a ring of nonlocally coupled FitzHugh-Nagumo oscillators in the bistable regime. A new type of chimera patterns has been found in the noise-free network and when isolated elements do not oscillate. The region of existence of these structures has been explored when the coupling range and the coupling strength between the network elements are varied.

  4. Lian-Sheng Ma, Editor-in-Chief of WJG, warmly meets Professor Hugh J Freeman from the University of British Columbia

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Lian-Sheng Ma, Editor-in-Chief of World Journal of Gastroenterology (WJG), warmly met Professor Hugh J Freeman from the University of British Columbia at Peninsula Hotel in Beijing on August 28, 2007. Professor Hugh J Freeman gave much helpful advice toward the further development of WJG. He will serve as series editor for a new column called OBSERVER which will start in WJG in 2008.

  5. Dynamical System Approach for Edge Detection Using Coupled FitzHugh-Nagumo Neurons.

    Science.gov (United States)

    Li, Shaobai; Dasmahapatra, Srinandan; Maharatna, Koushik

    2015-12-01

    The prospect of emulating the impressive computational capabilities of biological systems has led to considerable interest in the design of analog circuits that are potentially implementable in very large scale integration CMOS technology and are guided by biologically motivated models. For example, simple image processing tasks, such as the detection of edges in binary and grayscale images, have been performed by networks of FitzHugh-Nagumo-type neurons using the reaction-diffusion models. However, in these studies, the one-to-one mapping of image pixels to component neurons makes the size of the network a critical factor in any such implementation. In this paper, we develop a simplified version of the employed reaction-diffusion model in three steps. In the first step, we perform a detailed study to locate this threshold using continuous Lyapunov exponents from dynamical system theory. Furthermore, we render the diffusion in the system to be anisotropic, with the degree of anisotropy being set by the gradients of grayscale values in each image. The final step involves a simplification of the model that is achieved by eliminating the terms that couple the membrane potentials of adjacent neurons. We apply our technique to detect edges in data sets of artificially generated and real images, and we demonstrate that the performance is as good if not better than that of the previous methods without increasing the size of the network.

  6. The relaxation time of processes in a FitzHugh-Nagumo neural system with time delay

    Energy Technology Data Exchange (ETDEWEB)

    Gong Ailing; Zeng Chunhua [Faculty of Science, Kunming University of Science and Technology, Kunming 650093 (China); Wang Hua, E-mail: zchh2009@126.com [Province Engineering Research Center of Industrial Energy Conservation and New Technology, Kunming University of Science and Technology, Kunming, Yunnan 650093 (China)

    2011-08-01

    In this paper, we study the relaxation time (RT) of the steady-state correlation function in a FitzHugh-Nagumo neural system under the presence of multiplicative and additive white noises and time delay. The noise correlation parameter {lambda} can produce a critical behavior in the RT as functions of the multiplicative noise intensity D, the additive noise intensity Q and the time delay {tau}. That is, the RT decreases as the noise intensities D and Q increase, and increases as the time delay {tau} increases below the critical value of {lambda}. However, above the critical value, the RT first increases, reaches a maximum, and then decreases as D, Q and {tau} increase, i.e. a noise intensity D or Q and a time delay {tau} exist, at which the time scales of the relaxation process are at their largest. In addition, the additive noise intensity Q can also produce a critical behavior in the RT as a function of {lambda}. The noise correlation parameter {lambda} first increases the RT of processes, then decreases it below the critical value of Q. Above the critical value, {lambda} increases it.

  7. Robust Synchronization of Delayed Chaotic FitzHugh-Nagumo Neurons under External Electrical Stimulation

    Directory of Open Access Journals (Sweden)

    Muhammad Rehan

    2012-01-01

    Full Text Available Synchronization of chaotic neurons under external electrical stimulation (EES is studied in order to understand information processing in the brain and to improve the methodologies employed in the treatment of cognitive diseases. This paper investigates the dynamics of uncertain coupled chaotic delayed FitzHugh-Nagumo (FHN neurons under EES for incorporated parametric variations. A global nonlinear control law for synchronization of delayed neurons with known parameters is developed. Based on local and global Lipschitz conditions, knowledge of the bounds on the neuronal states, the Lyapunov-Krasovskii functional, and the L2 gain reduction, a less conservative local robust nonlinear control law is formulated to address the problem of robust asymptotic synchronization of delayed FHN neurons under parametric uncertainties. The proposed local control law guarantees both robust stability and robust performance and provides the L2 bound for uncertainty rejection in the synchronization error dynamics. Separate conditions for single-input and multiple-input control schemes for synchronization of a wide class of FHN systems are provided. The results of the proposed techniques are verified through numerical simulations.

  8. THE ONE-DIMENSIONAL HUGHES MODEL FOR PEDESTRIAN FLOW: RIEMANN-TYPE SOLUTIONS

    Institute of Scientific and Technical Information of China (English)

    Debora Amadori; M. Di Francesco

    2012-01-01

    This paper deals with a coupled system consisting of a scalar conservation law and an eikonal equation,called the Hughes model.Introduced in [24],this model attempts to describe the motion of pedestrians in a densely crowded region,in which they are seen as a 'thinking' (continuum) fluid.The main mathematical difficulty is the discontinuous gradient of the solution to the eikonal equation appearing in the flux of the conservation law.On a one dimensional interval with zero Dirichlet conditions (the two edges of the interval are interpreted as 'targets'),the model can be decoupled in a way to consider two classical conservation laws on two sub-domains separated by a turning point at which the pedestrians change their direction.We shall consider solutions with a possible jump discontinuity around the turning point.For simplicity,we shall assume they are locally constant on both sides of the discontinuity.We provide a detailed description of the localin-time behavior of the solution in terms of a 'global' qualitative property of the pedestrian density (that we call 'relative evacuation rate'),which can be interpreted as the attitude of the pedestrians to direct towards the left or the right target.We complement our result with explicitly computable examples.

  9. Noise-sustained synchronization between electrically coupled FitzHugh-Nagumo networks

    Science.gov (United States)

    Cascallares, Guadalupe; Sánchez, Alejandro D.; dell'Erba, Matías G.; Izús, Gonzalo G.

    2015-09-01

    We investigate the capability of electrical synapses to transmit the noise-sustained network activity from one network to another. The particular setup we consider is two identical rings with excitable FitzHugh-Nagumo cell dynamics and nearest-neighbor antiphase intra-ring coupling, electrically coupled between corresponding nodes. The whole system is submitted to independent local additive Gaussian white noises with common intensity η, but only one ring is externally forced by a global adiabatic subthreshold harmonic signal. We then seek conditions for a particular noise level to promote synchronized stable firing patterns. By running numerical integrations with increasing η, we observe the excitation activity to become spatiotemporally self-organized, until η is so strong that spoils sync between networks for a given value of the electric coupling strength. By means of a four-cell model and calculating the stationary probability distribution, we obtain a (signal-dependent) non-equilibrium potential landscape which explains qualitatively the observed regimes, and whose barrier heights give a good estimate of the optimal noise intensity for the sync between networks.

  10. Subthreshold and suprathreshold vibrational resonance in the FitzHugh-Nagumo neuron model

    Science.gov (United States)

    Zhu, Jinjie; Kong, Chen; Liu, Xianbin

    2016-09-01

    We study the subthreshold and suprathreshold vibrational resonance in the FitzHugh-Nagumo neuron model. For the subthreshold situation, two cases where the stationary states are equilibrium point and limit cycle are considered, where different natures of vibrational resonance are observed via theoretical and numerical methods. Especially when the frequency of the high-frequency driving force is near the so-called canard-resonance frequency, the firing rate can be significantly enhanced at the presence of noise. For the suprathreshold situation, we show that the local maxima of the response amplitude are located at the transition boundaries of different phase-locking patterns. The minimal required forcing amplitudes of high-frequency signal of the firing onset are just multiples of the spiking frequency. Furthermore, phase portraits and time series show that the presence of the global maxima of the response results from not only the suprathreshold but also the subthreshold phase-locking modes. In spite of the distinct characteristics for two stationary states on subthreshold oscillation, the suprathreshold vibrational resonance showed no qualitative difference between the two cases.

  11. Adaptable Analytical Vistas Illumine a Touchstone: Langston Hughes as Minor Author/Poet

    Directory of Open Access Journals (Sweden)

    Mzenga A. Wanyama

    2013-12-01

    Full Text Available The authentic association of spontaneity, as a spur or basis for artistic expression, with the vaunted notion of autonomy in literary creationis nowhere more clearly established than in the work of theorists Gilles Deleuze and Felix Guattari as they, inter-alia, explicate the unique literary repertoire bestowed upon the world by Franz Kafka. In their acclaimed works: Kafka: Toward a Minor Literature and Anti-Oedipus: Capitalism and Schizophrenia,they offered to literary theory the fascinating and analytically productive constructs of deterritorialization and anti-Oedipus in the context of a compelling portraiture of the ways in which various institutionalized relationships subtly prescribe and reinforce inequity in society’s power mechanics that tendentiously impact, among other realities, the nature and quality of literary products. They offered, in the process, a refreshing definition of minor literature that unequivocally restores to literature its distinctive place and role in the amalgamated adjudications of society’s intergroup dissensions. In this regard, the present paper subscribes to the idea that spontaneity equaled the intrinsic and immutable desire of the gifted literary mind of African-American author/poet Langston Hughes to reach expressivity in accordance, strictly, with his unalloyed literary vision and thus made autonomy the inevitable upshot of his inspiration and practice.

  12. Age-dependent relationship between horn growth and survival in wild sheep.

    Science.gov (United States)

    Bonenfant, Christophe; Pelletier, Fanie; Garel, Mathieu; Bergeron, Patrick

    2009-01-01

    1. Trade-offs in resource allocation underline the evolution of life-history traits but their expression is frequently challenged by empirical findings. In large herbivores, males with large antlers or horns typically have high mating success. The fitness costs of large horns or antlers have rarely been quantified although they are controversial. 2. Here, using detailed longitudinal data on n = 172 bighorn (Ovis canadensis, Shaw) and the capture-mark-recapture methodology, we tested whether early horn growth leads to a survival cost in rams ('trade-off' hypothesis) or if males that can afford rapid horn growth survive better than males of lower phenotypic quality ('phenotypic quality' hypothesis). We also quantified how hunting increased survival costs of bearing large horns. 3. We found an age-specific relationship between horn growth and survival. In all age classes, natural survival was either weakly related to (lambs, adult rams) or positively associated (yearling rams) with early horn growth. Hunting mortality was markedly different from natural mortality of bighorn rams, leading to an artificial negative association between early horn growth and survival. Beginning at age 4, the yearly harvest rate ranged from 12% for males with the smallest horns up to more than 40% for males with the largest horns. 4. Growing large horns early in life is not related to any consistent survival costs, hence supporting the phenotypic quality hypothesis in males of a dimorphic and polygynous large herbivores. Rapid horn growth early in life is, however, strongly counter selected by trophy hunting. We suggest that horn size is a very poor index of reproductive effort and that males modulate their mating activities and energy allocation to horn growth to limit its impact on survival.

  13. Afscheid van de stapelmarkt

    Directory of Open Access Journals (Sweden)

    J.W. Veluwenkamp

    2003-01-01

    Full Text Available C. Lesger, Handel in Amsterdam ten tijde van de Opstand. Kooplieden, commerciële expansie en verandering in de ruimtelijke economie van de Nederlanden ca. 1550-ca. 1630 Farewell to the Staple Market, Jan Willem VeluwenkampLesger argues that Amsterdam's essential function in international trade in the seventeenth century was turnover promotion through price stabilisation. Claiming that the relevant mechanism involved information provision rather than stockpiling, he convincingly bids farewell to the historiographical tradition of the Amsterdam staple market and introduces Amsterdamas the centre of information provision. I contest two aspects of Lesger's argument. Unlike him, I do not think that information provision was decisive in Amsterdam's commercial expansion around 1600: Prior to 1585, information exchange and expansion were characteristic for Antwerp too. The Amsterdam acceleration essentially involved the penetration of Asia and the Atlantic area, which was mainly provoked by the war. In addition, I think that Lesger underestimates the Dutch intermediate trade. On the one hand, Dutch industry-related import and export were more significant than he indicates. On the other hand, he attaches too little meaning to the fact that Dutchmen dominated international commerce even when they did not steer all commodity flows via the Dutch Republic.

  14. Ontwikkelen van detectiemethoden voor virussen in bloembolgewassen

    NARCIS (Netherlands)

    Pham, K.T.K.; Lemmers, M.E.C.; Doorn, van J.; Derks, A.F.L.M.

    2006-01-01

    Doel van dit project was, om detectiemethoden te ontwikkelen om virussen (en fytoplasma’s) in bloembolgewassen specifiek, snel en gevoelig aan te tonen. De resultaten van dit project zorgden voor betere toetsingsmogelijkheden. Keuringsactiviteiten van de Bloembollenkeuringsdienst (BKD) worden onders

  15. Staat van Infectieziekten in Nederland, 2007

    NARCIS (Netherlands)

    Rahamat-Langendoen JC; van Vliet JA; van Lier EA; EPI

    2008-01-01

    De Staat van Infectieziekten geeft inzicht in epidemiologische ontwikkelingen van infectieziekten in Nederland. Het beschrijft ook de ontwikkelingen in het buitenland die voor Nederland relevant zijn. Deze jaarlijkse uitgave informeert beleidsmakers bij het ministerie van Volksgezondheid, Welzijn

  16. Ontwerpen en berekenen van aluminium constructies

    NARCIS (Netherlands)

    Soetens, F.

    1996-01-01

    De toepassing van aluminium in dragende constructies is succesvol, indien de gunstige eigenschappen van aluminium goed worden benut en er voor de minder gunstige eigenschappen een adequate constructieve oplossing wordt geboden. De toepassingsmogelijkheden van aluminium zijn de laatste jaren

  17. Veterinaire risico's van ongedierte op biologische varkensbedrijven

    NARCIS (Netherlands)

    Meerburg, B.G.; Kijlstra, A.

    2005-01-01

    Presentatie van de eerste resultaten van een onderzoek door Animal Sciences Group van Wageningen UR naar de ziekterisico's bij ratten en muizen. Hiervoor zijn ratten en muizen op 10 biologische varkensbedrijven met vallen gevangen en op ziektes onderzocht.

  18. Portretten van EVC-praktijken

    NARCIS (Netherlands)

    Schlusmans, Kathleen; Klink, Marcel; Rutjens, Marjo van der; Stalmeier, Marjo; Joosten-ten Brinke, Desirée; Dinther, Mart van

    2006-01-01

    Met deze publicatie wordt beoogd gevarieerde en praktische informatie te bieden die behulpzaam kan zijn bij het ontwerpen en exploiteren van EVC-praktijken. Hoofdstuk 3 bevat een beschrijving van een 9-tal EVC-praktijken in het Nederlands hoger onderwijs.

  19. Van werk verzekerd : rapportage 2002

    NARCIS (Netherlands)

    Komduur, J.; Binken-Faassen, S.M.F.; Wewer, M.M.; Zwart, K.; Bosselaar, H.

    2003-01-01

    In deze jaarlijks terugkerende rapportage van de Helpdesk Gezondheid, Werk en Verzekeringen wordt verslag gedaan van de vragen en klachten die in 2002 bij de helpdesk zijn binnengekomen. In 2002 zijn in totaal 7308 telefonische of e-mailcontacten geregistreerd, 187 meer dan in 2001. Vragen kwamen va

  20. Beheersing van fusarium in zomertarwe

    NARCIS (Netherlands)

    Scholten, O.E.

    2007-01-01

    Fusariumschimmels veroorzaken in zomertarwe een slechte opkomst van zaaizaad en verlies aan opbrengst. Ook produceren ze mycotoxinen in de korrels. Vooral de mycotoxinen zijn met het oog op voedselveiligheid en diergezondheid een toenemende bron van zorg. Het is dus echt een ketenprobleem. Alle rede

  1. Voorspelbaarheid van evolutie en revolutie

    NARCIS (Netherlands)

    R.A.M. Fouchier (Ron)

    2007-01-01

    textabstractHet voorspellen van gebeurtenissen doen we meestal op grond van ervaringen uit het verleden. Daarmee vertel ik niets nieuws. Voorspellen is een dagelijkse bezigheid in onze samenleving. Meteorologen voorspellen elke dag het weer, met wisselend succes. Beleggers zouden graag ontwikkelinge

  2. Huisverkoop van biologisch vlees : handboek

    NARCIS (Netherlands)

    Heijden, van der C.H.T.M.

    2005-01-01

    Voor biologische boeren die willen beginnen met de verkoop van biologisch vlees aan huis, is het 'Handboek Huisverkoop Biologisch Vlees' samengesteld. Het handboek bevat o.a. marketingtips en een overzicht van de wet- en regelgeving. Het is opgesteld door Wageningen UR in samenwerking met Biologica

  3. Die etiek van Karl Barth

    Directory of Open Access Journals (Sweden)

    J. H. van Wyk

    1986-06-01

    Full Text Available Die etiek van Barth kan nie reg verstaan word sonder begrip van sy ganse teologiese agtergrond en opset, en ek wil byvoeg: sonder die besondere tydsomstandighede (oorlog! waarin hy geleef en gewerk het nie. Dit is verder bekend dat in sy teologiese ontwikkeling verskillende figure groot invloed op hom uitgeoefen het.

  4. Minerale voeding van de champignon

    NARCIS (Netherlands)

    Straatsma, G.; Olijnsma, T.W.; Paradi, I.; Baar, J.

    2006-01-01

    Slechte of matige groei, kwaliteit en opbrengst van champignons kunnen veroorzaakt worden door een tekort aan één of meerdere essentiële voedingsstoffen. De vraag is in hoeverre de voorziening met voedingsstoffen voldoende is om de behoefte van de champignon te dekken. Aanwijzingen voor eventuele

  5. NIVEL: van solo- naar groepspraktijk.

    NARCIS (Netherlands)

    Lammers, E.

    2003-01-01

    Van de huisartsen die vorig jaar hun opleiding hebben afgerond, is tweederde vrouw, wil 86% parttime werken en zou slechts 2% in een solopraktijk aan de slag willen. Van de huidige 7.939 werkzame huisartsen is 72% man, werkt 42% parttime en is 40% werkzaam in een solopraktijk. Er gaat dus nogal wat

  6. Bestrijding van emelten in gras

    NARCIS (Netherlands)

    Rozen, van K.

    2006-01-01

    Emelten, de larven van de langpootmuggen, zijn een belangrijke plaag in grasland in Noordwest-Europa. Indien grasland wordt gescheurd voor een land- of tuinbouwgewas, is de kans op emeltschade in het volggewas reëel, afhankelijk van het type volggewas. De problemen in akkerbouwgewassen doen zich voo

  7. De structuur van Kierkegaards oeuvre

    NARCIS (Netherlands)

    Dokter, Taeke

    1936-01-01

    Kierkegaard is van meening, dat zijn tijd door het velewetenvergeten heeft wat existeeren is. Zljn werkzaamheid beoogt dan ook niet de mededeeling van rveten, maar is veeleer een oproep tot existeeren en zijn geschriften dragen naar \\-orm en inhoud een overeenkomstig karakter. Niet alsof een omlijnd

  8. Bestrijding van citruswolluis in potplanten

    NARCIS (Netherlands)

    Pijnakker, J.; Leman, A.

    2012-01-01

    Referaat Momenteel worden wolluizen vaak biologisch bestreden in binnentuinen van kantoren, zwembaden, dierentuinen en kassen bij botanische tuinen. De resultaten van biologische bestrijding zijn voor deze toepassingsgebieden over het algemeen goed, maar dit geldt niet voor commerciële productie in

  9. Haiku : Van scherts tot experiment

    NARCIS (Netherlands)

    Walle, Vande Willy

    2002-01-01

    Over de Japanse haiku bestaan nog vele misvattingen of eenzijdige voorstellingen. Het is geen zen-gedicht, epigram of aforisme, en zelfs lang niet altijd een natuurgedicht. Aan het einde van de negentiende eeuw maakte Europa voor het eerst kennis met wat wel het kortste gedicht van de wereld wordt g

  10. Landbouwkosten van KRW-maatregelen

    NARCIS (Netherlands)

    Polman, N.B.P.; Reinhard, A.J.; Linderhof, V.G.M.; Michels, R.; Peerlings, J.H.M.

    2009-01-01

    LNV heeft het LEI opdracht gegeven voor 3 analyses van de effecten van KRW-maatregelen op de landbouw. Ten eerste is de landelijke KRW-maatregelendatabase (versie november 2008) geanalyseerd met het SMART-raamwerk. SMART staat voor de mate, waarin maatregelen Specifiek, Meetbaar, Acceptabel, Realist

  11. Het tijdelijk spenen van biggen

    NARCIS (Netherlands)

    Plagge, J.G.; Peet-Schwering, van der C.M.C.

    1998-01-01

    In dit onderzoek is getracht de voeropname tijdens de zoogperiode te verhogen door de biggen een gedeelte van de dag van de zeug te scheiden. Biggen in de controlegroep bleven, zoals gebruikelijk, tijdens de zoogperiode altijd bij de zeug. Biggen in de proefgroep werden, vanaf dag 18 na de geboorte,

  12. Die binding van die konfessie

    Directory of Open Access Journals (Sweden)

    P. J. Coetzee

    1970-06-01

    Full Text Available Ons moet waak teen twee uiterstes. Aan die een kant het die dogma as onversoenlike vyand die dogmatisme en aan die ander kant die antidogmatisme — dit hou enersyds die gevaar in van verabsolutering (oorskatting, en ander- syds die gevaar van relativisme (onderskatting.

  13. Bestrijding van maden van de wortelvlieg; Bestrijding van de made van de wortelvlieg Psila rosae in knolselderij, 2007

    NARCIS (Netherlands)

    Rozen, van K.; Ester, A.

    2007-01-01

    Onderzoek naar het probleem wortelvlieg in knolselderij om een bestrijdingsmethode tegen de maden van de wortelvlieg in knolselderij. In dit onderzoek worden chemische middelen en methodieken van toediening getest in één veldproef. Het betreft een Phyto-drip behandeling tijdens het zaaien bij de

  14. Van Risicomanagement naar Succes Governance

    NARCIS (Netherlands)

    Joosten, H.J.M.

    2013-01-01

    Alle IT incidenten die WebWereld in oktober 2011 [1] heeft gemeld, zijn veroorzaakt door één van de top 10 exploits, zoals die op het OWASP-afstreeplijstje van 2010 reeds zijn vermeld [2]. Het is merkwaardig dat regelmatig wordt gemeld dat servers zijn gecompromitteerd doordat, bijvoorbeeld, securit

  15. Grondbeginselen van de methode (1817)

    OpenAIRE

    Pestalozzi, Johann Heinrich

    1995-01-01

    In opvoeding en onderwijs gaat het volgens Pestalozzi om de ontwikkeling van hoofd, hart en handen (‘Pädagogik des Kopfes, des Herzens und der Hand’). Het beste geschiedt dat door middel van de ‘natuurlijke opvoeding’. Hij noemde dit zijn ‘methode’.

  16. Optimale, energiezuinige bewaring van lelieplantgoed

    NARCIS (Netherlands)

    Vasen, R.; Diepen, G.; Gude, H.

    2009-01-01

    Tijdens het seizoen staan de lelies een flinke tijd in de koelcel. Wat is de beste manier van bewaren om een optimale bolkwaliteit te behouden en een minimum aan energie te gebruiken? DLV Plant en PPO zijn in opdracht van de partijen in de MJA-Energie op zoek gegaan naar de meest energiezuinige bewa

  17. Beheersing van fusarium in zomertarwe

    NARCIS (Netherlands)

    Scholten, O.E.

    2007-01-01

    Fusariumschimmels veroorzaken in zomertarwe een slechte opkomst van zaaizaad en verlies aan opbrengst. Ook produceren ze mycotoxinen in de korrels. Vooral de mycotoxinen zijn met het oog op voedselveiligheid en diergezondheid een toenemende bron van zorg. Het is dus echt een ketenprobleem. Alle rede

  18. De structuur van Kierkegaards oeuvre

    NARCIS (Netherlands)

    Dokter, Taeke

    1936-01-01

    Kierkegaard is van meening, dat zijn tijd door het velewetenvergeten heeft wat existeeren is. Zljn werkzaamheid beoogt dan ook niet de mededeeling van rveten, maar is veeleer een oproep tot existeeren en zijn geschriften dragen naar \\-orm en inhoud een overeenkomstig karakter. Niet alsof een omlijnd

  19. Beam steering and impedance matching of plasmonic horn nanoantennas

    Science.gov (United States)

    Afridi, Adeel; Kocabaş, Şükrü Ekin

    2016-10-01

    In this paper, we study a plasmonic horn nanoantenna on a metal-backed substrate. The horn nanoantenna structure consists of a two-wire transmission line (TWTL) flared at the end. We analyze the effect of the substrate thickness on the nanoantenna's radiation pattern, and demonstrate beam steering in a broad range of elevation angles. Furthermore, we analyze the effect of the ground plane on the impedance matching between the antenna and the TWTL, and observe that the ground plane increases the back reflection into the waveguide. To reduce the reflection, we develop a transmission line model to design an impedance matching section which leads to 99.75% power transmission to the nanoantenna.

  20. The Schur-Horn theorem for operators with finite spectrum

    CERN Document Server

    Bhat, B V Rajarama

    2011-01-01

    The carpenter problem in the context of $II_1$ factors, formulated by Kadison asks: Let $\\mathcal{A} \\subset \\mathcal{M}$ be a masa in a type $II_1$ factor and let $E$ be the normal conditional expectation from $\\mathcal{M}$ onto $\\mathcal{A}$. Then, is it true that for every positive contraction $A$ in $\\mathcal{A}$, there is a projection $P$ in $\\mathcal{M}$ such that $E(P) = A$? In this note, we show that this is true if $A$ has finite spectrum. We will then use this result to prove an exact Schur-Horn theorem for (positive)operators with finite spectrum and an approximate Schur-Horn theorem for general (positive)operators.

  1. Beam steering and impedance matching of plasmonic horn nanoantennas

    CERN Document Server

    Afridi, Adeel

    2016-01-01

    In this paper, we study a plasmonic horn nanoantenna on a metal-backed substrate. The horn nanoantenna structure consists of a two-wire transmission line (TWTL) flared at the end. We analyze the effect of the substrate thickness on the nanoantenna's radiation pattern, and demonstrate beam steering in a broad range of elevation angles. Furthermore, we analyze the effect of the ground plane on the impedance matching between the antenna and the TWTL, and observe that the ground plane increases the back reflection into the waveguide. To reduce the reflection, we develop a transmission line model to design an impedance matching section which leads to 99.75% power transmission to the nanoantenna.

  2. Envenomation by the horned viper (Vipera ammodytes L.).

    Science.gov (United States)

    Radonić, V; Budimir, D; Bradarić, N; Luksić, B; Sapunar, D; Vilović, K

    1997-03-01

    Snake venom poisoning is a medical emergency that requires urgent therapeutic procedures. The treatment of venomous snakebites is still controversial because of unclear therapeutic modalities. Choice of treatment is dictated in part by regional characteristics with regard to patient population and types of venomous snakes. The purpose of the study presented here was to report regional experience with venomous snakebites and to describe first-aid, pre-hospital, and hospital therapeutic procedures for horned viper bite. During a 16-year period, from 1980 to 1996, at the Clinical Hospital Split (Croatia) we collected data on 389 victims of horned viper bite. Incidence of the local and general complications is presented. We also reviewed therapeutic modalities and outcome with special attention to compartment syndromes and the indications for fasciotomy.

  3. Broeigedrag en -sukses van tuinduiwe

    Directory of Open Access Journals (Sweden)

    Pieter le Roux

    2013-02-01

    Full Text Available Broei-aktiwiteite van tuinduiwe (Columba livia in die Bloemfonteinse stadsgebied vind dwarsdeur die jaar plaas met ’n afname gedurende die laat somermaande wanneer seisoenale reënval in die streek ’n hoogtepunt bereik. Nesstrukture is relatief primitief en word gekenmerk deur ’n losse samestelling van nesmateriaal op opgehoopte, droë voëlmis. Broeisels van twee eiers is die mees algemene grootte en die eiers word gewoonlik binne twee dae ná mekaar gelê. Beide ouers is by die broeiproses van meer as twee weke betrokke, waartydens die eiers ’n progressiewe afname in massa ondergaan. Pas uitgebroeide neskuikens is met geel dons bedek en is grootliks hulpeloos. Egte vere begin eers ná die eerste week te voorskyn kom, en vanaf die derde week kan individue wankelrig rondbeweeg. Afgesien van die eerste paar dae na uitbroei, handhaaf neskuikens van seldsame enkeleier-broeisels deurgaans ’n laer liggaammassa as dié van normale broeisels. Die broeisukses van 247 broeipare vir hierdie studie is 34%. Eierverlies is hoër as die mortaliteitsyfer van neskuikens, en word veral deur klimaatsfaktore soos reënval geaffekteer. Predasie blyk die belangrikste faktor te wees wat die mortaliteitsyfer van neskuikens beïnvloed. Antagonistiese interaksie tussen krans- en tuinduiwe, asook moontlike intraspesie-aggressie, speel egter ook ’n beduidende rol.

  4. Filosofiese tendense in die wordinggeskiedenis van ons verstaan van die fisiese natuur

    Directory of Open Access Journals (Sweden)

    D. F. M. Strauss

    2006-09-01

    Full Text Available Die ontstaan van ’n lang tradisie van natuurwetenskaplike denke is in antieke Griekeland te vind – die bakermat van die Westerse beskawing en die bron van geartikuleerde rasionele besinning. Die vroegste fases van die Griekse kultuur het reeds geboorte geskenk aan ’n teoretiese nadenke oor die heelal. Die Pythagoreërs is veral bekend vir hul klem op die verklaringskrag van getalsverhoudinge. In hul tese dat “alles getal is” het hulle egter slegs rasionale getalle (breuke erken en gevolglik uiteindelik vasgeloop in die ontdekking van irrasionale getalle wat tot die geometrisering van die Griekse wiskunde gelei het en tegelyk die bedding gevorm het van waaruit ’n magtige tradisie van ruimte-metafisika gegroei het wat die hele middeleeuse tydperk omspan het. Die vermeende statiese syn is in die mees ekstreme geval – die skool van Parmenides en die argumente van Zeno teen veelheid en beweging – tot in die uiteindelike antinomiese konsekwensies daarvan deurdink. Dit was egter eers die vroeg-moderne tyd – die voorgangers en nakomelinge van Galilei – wat naas getal en ruimte ’n waardering ontwikkel het vir die verklaringskrag van beweging (vergelyk die klassieke meganistiese wêreldbeeld van die heelal as ’n meganisme van stofdeeltjies in beweging. Maar ook hierdie meganistiese reduksie (waardeur alle fisiese verskynsels herlei is tot die beweging van al of niegelade massapunte sou uiteindelik misluk omdat dit nie van die onomkeerbaarheid van fisiese prosesse rekenskap kon gee nie. Gevolglik beliggaam eers die fisika van die 20ste eeu ’n erkenning van die deurslaggewend-stempelende rol van energie-werking (dus van die fisiese aspek in die aard van stoflike dinge en prosesse. Die artikel word afgesluit met ’n vlugtige verduideliking van die implikasies van die voorafgaande argumentasie vir ’n benadering van die misterie van die bestaan van materie.

  5. Gene discovery in the horned beetle Onthophagus taurus

    Directory of Open Access Journals (Sweden)

    Yang Youngik

    2010-12-01

    Full Text Available Abstract Background Horned beetles, in particular in the genus Onthophagus, are important models for studies on sexual selection, biological radiations, the origin of novel traits, developmental plasticity, biocontrol, conservation, and forensic biology. Despite their growing prominence as models for studying both basic and applied questions in biology, little genomic or transcriptomic data are available for this genus. We used massively parallel pyrosequencing (Roche 454-FLX platform to produce a comprehensive EST dataset for the horned beetle Onthophagus taurus. To maximize sequence diversity, we pooled RNA extracted from a normalized library encompassing diverse developmental stages and both sexes. Results We used 454 pyrosequencing to sequence ESTs from all post-embryonic stages of O. taurus. Approximately 1.36 million reads assembled into 50,080 non-redundant sequences encompassing a total of 26.5 Mbp. The non-redundant sequences match over half of the genes in Tribolium castaneum, the most closely related species with a sequenced genome. Analyses of Gene Ontology annotations and biochemical pathways indicate that the O. taurus sequences reflect a wide and representative sampling of biological functions and biochemical processes. An analysis of sequence polymorphisms revealed that SNP frequency was negatively related to overall expression level and the number of tissue types in which a given gene is expressed. The most variable genes were enriched for a limited number of GO annotations whereas the least variable genes were enriched for a wide range of GO terms directly related to fitness. Conclusions This study provides the first large-scale EST database for horned beetles, a much-needed resource for advancing the study of these organisms. Furthermore, we identified instances of gene duplications and alternative splicing, useful for future study of gene regulation, and a large number of SNP markers that could be used in population

  6. The magnetic horn being installed in the CNGS target chamber

    CERN Multimedia

    Maximilien Brice

    2006-01-01

    The magnetic system that focuses the beam of particles arising from the graphite target of the CERN Neutrinos to Gran Sasso project (CNGS) has been installed in its final position in the tunnel.The CNGS secondary beam magnetic system consists of two elements: the horn and the reflector, both acting as focusing lenses for the positively-charged pions and kaons produced by proton interactions in the target.

  7. Endomorphins: localization, release and action on rat dorsal horn neurons.

    Science.gov (United States)

    Dun, N J; Dun, S L; Wu, S Y; Williams, C A; Kwok, E H

    2000-01-01

    Endomorphin (Endo) 1 and 2, two tetrapeptides isolated from the bovine and human brain, have been proposed to be the endogenous ligand for the mu-opiate receptor. A multi-disciplinary study was undertaken to address the issues of localization, release and biological action of Endo with respect to the rat dorsal horn. First, immunohistochemical studies showed that Endo-1- or Endo-2-like immunoreactivity (Endo-1- or Endo-2-LI) is selectively expressed in fiber-like elements occupying the superficial layers of the rat dorsal horn, which also exhibit a high level of mu-opiate receptor immunoreactivity. Second, release of immunoreactive Endo-2-like substances (irEndo) from the in vitro rat spinal cords upon electrical stimulation of dorsal root afferent fibers was detected by the immobilized antibody microprobe technique. The site of release corresponded to laminae I and II where the highest density of Endo-2-LI fibers was localized. Lastly, whole-cell patch clamp recordings from substantia gelatinosa (SG) neurons of rat lumbar spinal cord slices revealed two distinct actions of exogenous Endo-1 and Endo-2: (1) depression of excitatory and/or inhibitory postsynaptic potentials evoked by stimulation of dorsal root entry zone, and (2) hyperpolarization of SG neurons. These two effects were prevented by the selective mu-opiate receptor antagonist beta-funaltrexamine. The localization of endomorphin-positive fibers in superficial layers of the dorsal horn and the release of irEndo upon stimulation of dorsal root afferents together with the observation that Endo inhibits the activity of SG neurons by interacting with mu-opiate receptors provide additional support of a role of Endo as the endogenous ligand for the mu-opiate receptor in the rat dorsal horn.

  8. Calibration of the SH134-20 Standard Gain Horn

    DEFF Research Database (Denmark)

    Pivnenko, Sergey; Breinbjerg, Olav

    This report documents the measurement of the linearly polarized SH134-20 Standard Gain Horn. The measurement comprises on-axis gain, on-axis polarization characteristics, and reflection coefficient at 111 frequencies in the frequency range from 22-33 GHz. The measurement was carried out at the DT......-ESA Spherical Near-Field Antenna Test Facility in December 2012 for SE Laboratories, Santa Clara, CA, USA....

  9. Spatial patterns in the abundance of the coastal horned lizard

    Science.gov (United States)

    Fisher, Robert N.; Suarez, Andrew V.; Case, Ted J.

    2002-01-01

    Coastal horned lizards (   Phrynosoma coronatum) have undergone severe declines in southern California and are a candidate species for state and federal listing under the Endangered Species Act. Quantitative data on their habitat use, abundance, and distribution are lacking, however. We investigated the determinants of abundance for coastal horned lizards at multiple spatial scales throughout southern California. Specifically, we estimated lizard distribution and abundance by establishing 256 pitfall trap arrays clustered within 21 sites across four counties. These arrays were sampled bimonthly for 2–3 years. At each array we measured 26 “local” site descriptors and averaged these values with other “regional” measures to determine site characteristics. Our analyses were successful at identifying factors within and among sites correlated with the presence and abundance of coastal horned lizards. These factors included the absence of the invasive Argentine ant (  Linepithema humile) (and presence of native ant species eaten by the lizards), the presence of chaparral community plants, and the presence of sandy substrates. At a regional scale the relative abundance of Argentine ants was correlated with the relative amount of developed edge around a site. There was no evidence for spatial autocorrelation, even at the scale of the arrays within sites, suggesting that the determinants of the presence or absence and abundance of horned lizard can vary over relatively small spatial scales ( hundreds of meters). Our results suggest that a gap-type approach may miss some of the fine-scale determinants of species abundance in fragmented habitats.

  10. Kraamkamer van duurzaamheid : de innovatieve kracht van biologische landbouw voor verduurzaming van de gangbare landbouw

    NARCIS (Netherlands)

    Teenstra, E.D.

    2004-01-01

    Velen dichten de biologische landbouw een grote rol toe in de verduurzaming van de gangbare landbouw. Maar hoe groot is nu die innovatieve kracht van de biologische landbouw en welke invloed heeft dit op een aantal duurzaamheidthema’s? Dit zijn de vragen waarop deze publicatie een antwoord geeft. De

  11. Bestrijding en beheersing van overmatige groei van de schimmel Leucocoprinus birnbaumii bij de teelt van Phalaenopsis

    NARCIS (Netherlands)

    Ludeking, D.J.W.; Paternotte, S.J.; Hamelink, R.; Slooten, van M.A.

    2011-01-01

    Referaat Bij de teelt van Phalaenopsis wordt als teeltmedium over het algemeen boombast gebruikt, al dan niet gemengd met verschillende vulstoffen zoals sphagnum of foam. Gedurende de teelt wordt regelmatig een plotselinge groei van schimmelpluis of vruchtlichamen en zelfs paddenstoelen waargenomen.

  12. Beoordeling van de gevoeligheid van soorten en habitattypes van Europees belang bij verstoringingrepen

    OpenAIRE

    Wouters, Jan

    2011-01-01

    Om ecologische schade te vermijden, moeten activiteiten of plannen met mogelijk schadelijke effecten doorgelicht worden. Het instrument ‘effectenindicator’ licht activiteiten in algemene termen door op mogelijke natuureffecten. De in dit advies weergegeven gevoeligheidstabellen geven de gevoeligheid op van soorten en biotopen voor effecten ten gevolge van menselijke activiteiten. De tabellen bevatten deze gegevens voor de soorten waarvoor gewestelijke instandhoudingsdoelstellingen zijn opgest...

  13. Vergelijking van de remming van de geneesmiddelenopname uit de darm door verschillende toedieningsvormen van actieve kool

    NARCIS (Netherlands)

    Remmert HP; Olling M; Slob W; van der Giesen WF; Rauws AG

    1988-01-01

    Diverse in Nederland in de handel zijnde actieve kool bevattende farmaceutische produkten dragen de aanprijzing "hulpmiddel bij de behandeling van vergiftigingen". In een vergelijkend onderzoek bij proefpersonen werd nagegaan wat de werkzaamheid is van actieve kool als tabletten, in een c

  14. Ontwikkeling van een protocol voor de transformatie van iris; introductie van resistentie tegen irismozaik viris (IMMV)

    NARCIS (Netherlands)

    Langeveld, S.A.; Klerk, de G.J.M.

    2004-01-01

    Twee iris cultivars, Blue Magic en Blue Sail, werden in weefselkweek gebracht en callus werd geïnduceerd. Dit callus werd genetisch gemodificeerd met virusresistentie via de particle gun procedure die eerder voor lelie was ontwikkeld. Van een van de cultivars, Blue Magic, werden getransformeerde pla

  15. Interpolant tree automata and their application in Horn clause verification

    DEFF Research Database (Denmark)

    Kafle, Bishoksan; Gallagher, John Patrick

    2016-01-01

    This paper investigates the combination of abstract interpretation over the domain of convex polyhedra with interpolant tree automata, in an abstraction-refinement scheme for Horn clause verification. These techniques have been previously applied separately, but are combined in a new way in this ...... clause verification problems indicates that the combination of interpolant tree automaton with abstract interpretation gives some increase in the power of the verification tool, while sometimes incurring a performance overhead.......This paper investigates the combination of abstract interpretation over the domain of convex polyhedra with interpolant tree automata, in an abstraction-refinement scheme for Horn clause verification. These techniques have been previously applied separately, but are combined in a new way...... in this paper. The role of an interpolant tree automaton is to provide a generalisation of a spurious counterexample during refinement, capturing a possibly infinite set of spurious counterexample traces. In our approach these traces are then eliminated using a transformation of the Horn clauses. We compare...

  16. Die hermeneutiek van gereformeerde kerkreg

    Directory of Open Access Journals (Sweden)

    Andries le Roux du Plooy

    2012-09-01

    Full Text Available Die artikel het op die belangrikheid en noodsaaklikheid van ‘n hermeneutiek vir die gereformeerde kerkreg gefokus. Die kerkregtelike dokument wat besonderlik ter sake was, is die kerkorde van die Gereformeerde kerke in Suid-Afrika, met sy besondere band met die Dordtse kerkorde van 1618 en 1619. Agtereenvolgens is aandag gegee aan die volgende aspekte soos (1 die eiesoortige aard van ‘n kerkorde as ‘n teologiese dokument en teks, in onderskeiding van regsdokumente; (2 die aard van die hermeneutiek van kerkreg; (3 enkele teorieë oor die interpretasie of uitleg van tekste, veral regstekste en (4 normatiewe vooronderstellings en reëls vir die interpretasie en verstaan van die teks en artikels van die kerkorde asook besluite van kerklike vergaderinge. Die gevolgtrekking was dat weinig indringende navorsing gedoen is oor die saak van hermeneutiek vir kerkreg, hoewel dit noodsaaklik is. Duidelike hermeneutiese reëls is gesuggereer en verduidelik, wat sou kon meehelp dat kerke en kerklike vergaderinge die artikels van die kerkorde asook besluite en reglemente wat daarop berus het, kan interpreteer en toepas.The hermeneutics of reformed church polity. The article focused on the importance and urgency of a design for reformed hermeneutics on church polity. The Church Order referred to in the article is the Church Order of the Reformed Churches in South Africa, which are closely related to the Church Order of Dordt of 1618 and 1619. The following aspects received attention namely (1  the unique character of a Church Order, in comparison to and distinguished from legal documents and statutes; (2 the character and nature of hermeneutics of church polity; (3 theories of interpretation in the common law tradition and their relevance to church polity and (4 normative presuppositions and marks for the interpretation and understanding of the text and articles of the Church Order, as well as the resolutions of church assemblies. It was found that

  17. Overwaaien van bestrijdingsmiddelen naar waterlopen bij bespuiting in de bloembollenteelt

    NARCIS (Netherlands)

    Peppel-Groen, van de A.E.; Smidt, R.A.; Leistra, M.

    1995-01-01

    Het overwaaien van bestrijdingsmiddelen bij bespuitingen in de bloembollenteelt, als mogelijke bron van verontreiniging van waterlopen, is onderzocht. De methoden voor het meten van de depositie van de voorbeeldstoffen esfenvaleraat, chloridazon en Brilliant Sulfoflavine op verschillende collectoren

  18. Alternatieven voor de bestrijding van aardbeimijt in plantmateriaal: Projecteindrapport

    NARCIS (Netherlands)

    Kruistum, van G.; Vlaswinkel, M.E.T.; Spoorenberg, P.M.

    2007-01-01

    Overzicht van de mogelijke alternatieven voor begassen met methylbromide tegen aardbeimijt in vermeerderingsmateriaal van aardbei. Het doel van het onderzoek is het ontwikkelen van een bedrijfszeker alternatief voor methylbromide met een vrijwel gelijke effectiviteit in doding van de aardbeimijt.

  19. Invloed van de pH op het aantonen van bacteriegroeiremmende stoffen in rauwe melk

    OpenAIRE

    Vermunt, A.E.M.; Bakker, R.; Herben, P.J.; Loeffen, G.; Polman, T.; Keukens, H.; Stegeman, H.; Huf, F.A.

    1991-01-01

    Een hoeveelheid melk wordt toegevoegd aan een vaste voedingsbodem, waaraan sporen van Bacillus stearothermophilus var. calidolactis ATCC 10149, broomcresolpurper en trimethoprim zijn toegevoegd. Normale groei van en zuurproduktie door het micro-organisme veroorzaakt een kleurverandering van de pH indicator van paars naar geel. De aanwezigheid in de melk van stoffen die remmend werken op de groei van het micro-organisme, hebben tot gevolg dat de kleur van de pH indicator paars blijft. Nagegaan...

  20. OBITUARY: Eur.Ing. Professor David Dew-Hughes in memoriam

    Science.gov (United States)

    Campbell, Archie; Dew-Hughes, Denise; Donaldson, Gordon; Palmer, Richard

    2007-06-01

    We regret to announce the death of David Dew-Hughes, the second Honorary Editor of Superconductor Science and Technology, in Autumn 2006. He was born in Manchester, the eldest of three children, attended Manchester Grammar School and took his first degree in metallurgy at Birmingham, before undertaking a Doctorate of Engineering at Yale University. After initial work for IBM on semiconductors, he returned to England as a lecturer in metallurgy at Cambridge University. There he devoted his career to superconductivity long before it became fashionable, starting a group on the properties of what we now know as type II materials, with his students Jan Evetts, Archie Campbell and Anant Narlikar. Between them they paved the way to our understanding of the magnetic vortex properties of these materials, and thus to the development of modern practical materials for superconducting magnets. Eur.Ing. Professor David Dew-Hughes 1932-2006 In 1965 he became a founding Senior Lecturer in physics at Lancaster University, moving to Brookhaven National Laboratory in 1974. His final academic post was in engineering science at Oxford University where he also held a University College Tutorial Fellowship. As long ago as 1971 David wrote an authoritative review for Reports on Progress in Physics on 'The metallurgical enhancement of type II superconductors'. Following the discovery of high-Tc superconductivity, IOP Publishing launched Superconductor Science and Technology in 1988 and he was a founder member of its Editorial Board. When Jan Evetts retired as Honorary Editor in 1992, David was the natural choice as his successor. He served a five year term and remained on the Board as Deputy Editor until the end of 2000. To mark the 10th anniversary of high-temperature superconductivity in 1997, David edited a special issue of Superconductor Science and Technology in which past and present members of the Editorial Board contributed reviews of their specialities. He noted that at that time