10,477 research outputs found
Portrait of Dymphna Cusack, author [picture]
No full textCondition: Good.; Part of collection: Ion Idriess glass plate negative collection.; Title from signature on image.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.pic-vn3299415. "My love, Dymphna Cusack 1954"--signature on image
Ion Idriess, author, 1953
No full textIon Idriess, author, sitting at a desk reading his book "Lightning Ridge
MIAMI: Microscope and ion accelerator for materials investigations
No full textA transmission electron microscope (TEM) with in situ ion irradiation has been built at the University of Salford, U.K. The system consists of a Colutron G-2 ion source connected to a JEOL JEM-2000FX TEM via an in-house designed and constructed ion beam transport system. The ion source can deliver ion energies from 0.5 to 10 keV for singly charged ions and can be floated up to 100 kV to allow acceleration to higher energies. Ion species from H to Xe can be produced for the full range of energies allowing the investigation of implantation with light ions such as helium as well as the effects of displacing irradiation with heavy inert or self-ions. The ability to implant light ions at energies low enough such that they come to rest within the thickness of a TEM sample and to also irradiate with heavier species at energies sufficient to cause large numbers of atomic displacements makes this facility ideally suited to the study of materials for use in nuclear environments. TEM allows the internal microstructure of a sample to be imaged at the nanoscale. By irradiating in situ it is possible to observe the dynamic evolution of radiation damage which can occur during irradiation as a result of competing processes within the system being studied. Furthermore, experimental variables such as temperature can be controlled and maintained throughout both irradiation and observation. This combination of capabilities enables an understanding of the underlying atomistic processes to be gained and thus gives invaluable insights into the fundamental physics governing the response of materials to irradiation. Details of the design and specifications of the MIAMI facility are given along with examples of initial experimental results in silicon and silicon carbide
Small microwave ion source for an ion implanter
No full textThree kinds of small 24.5 GHz microwave ion sources have been developed for a middle current implanter. The magnetic fields of the sources are produced by an electromagnetic coil, electromagnetic coil added permanent magnet ring, and permanent magnet rings, respectively. Adopting single-hole accel-decel extraction electrodes with about 5 mA of nitrogen and oxygen, ion current can be extracted from them. The microwave power consumption is about 100-200 W. (C) 1996 American Institute of Physics.Instruments & InstrumentationPhysics, AppliedSCI(E)
Recent ion source development in China
No full textThe recent development of various types of ion sources and their application in China is reviewed. Emphasis is given to new improvements of the electron cyclotron resonance ion source; MEVVA ion source, electron beam evaporation metal ion source, compact multicusp ion source, as well as compact negative ion sources with permanent magnets. Some of the new proposals are also presented. (C) 1996 American Institute of Physics.Instruments & InstrumentationPhysics, AppliedSCI(E)
Doubly-charged Negative Ion of C60 Molecule
No full textWithin the Dirac- and Lorentz-bubble potential models an electronic structure of the doubly-charged negative ion -2 C has been studied by a variational method. It is s 60 hown that even in the first approximation of this method when a trial wave function of the two electrons is represented as a product of one-electron functions the total energy of the system is negative, a manifestation of the existence of a stable state of the doubly-charged negative ion in these models. The second electron affinity of C60 according to estimation is about ?2 ? 1 eV. The photodetachment cross sections ?(?) of this ion have been calculated as well. Near threshold ?(?) is found to exhibit peculiar and interesting behavior. The first cross section accompanied by the transformation of the doubly-charged negative ion into a singly-charged one is exponentially small near the process threshold. The second cross section corresponds to the photodetachment of a singly-charged ion; it increases at the threshold as a power function of the kinetic energy of the photoelectron. These cross sections are of the same order as the photodetachment cross sections of atomic ions with the same electron affinity
Blocul de plan transvers abdominal – considerente anatomice și tehnice (Revista literaturii)
No full textManagementul durerii după intervențiile chirurgicale abdominale reprezintă o preocupare majoră pentru serviciul de anesteziologie. În mod tradițional, tratamentul durerii postoperatorii este asigurat prin administrarea opioidelor, a antiinfl amatoarelor nesteroidiene, infi ltrarea locală a anestezicelor, analgezie epidurală sau spinală. Din păcate, aceste modalități nu sunt lipsite de riscuri și efecte adverse. În ultimul timp, blocurile nervoase regionale, și în special blocul de plan transvers abdominal, au atras atenția în cadrul terapiei multimodale a durerii, datorită capacității lor de a bloca durerea periferică abdominală, complicațiilor mai rare și utilizării relativ simple. Articolul prezent sumarizează datele literaturii de specialitate despre aspectele anatomice și tehnice ale blocului de plan transvers abdominal, precum și utilitatea acestuia pentru analgezia postoperatorie a peretelui abdominal antero-lateral. Deoarece peretele abdominal este cel care contribuie la durerea acută postoperatorie după chirurgia abdominală, blocurile regionale (blocul de plan transvers abdominal, în particular) pot oferi o alternativă bună și efi cientă de analgezie după intervențiile chirurgicale abdominal
Development of ion sources for materials processing in China
No full textThis article reviews the development of ion sources for materials processing and the progress of commercial product of ion sources in China. The various ion-beam processing and the relative needs to ion sources are mentioned and discussed, such as ion sources with ion implantation, plasma immersion ion implantation, ion-beam-assisted deposition, ion-beam deposition, and so on. The states of progress for different kinds of ion sources specially for electron cyclotron resonance/ microwave, metal vapor vacuum arc, radio frequency (rf) ion source, end-Hall ion source, and cluster ion source, are given and discussed. (c) 2006 American Institute of Physics.Instruments & InstrumentationPhysics, AppliedSCI(E)CPCI-S(ISTP)
Clinical aspects of transversus abdominis plan block in adults. Review
No full textCatedra Anesteziologie și Reanimatologie „Valeriu Ghereg”, USMF „Nicolae Testemițanu”The transversus abdominis plane (TAP) block is a relatively new regional anesthesia
technique that provides analgesia to the parietal peritoneum as well as the skin and muscles of
the anterior abdominal wall. It is technically simple to perform and only few cases of
complications were reported. It looks like to have a high margin of safety. It is increasingly used
as pain relief tool after abdominal surgery, as a component of multi-modular pain management
strategies.
Now there are more than 100 articles published on this issue in peer-reviewed journals and a lot
of studies are ongoing. However adoption of TAP blocks in clinical practice in the Republic of
Moldova is slow.
Blocul de plan transvers abdominal (TAP) este o tehnică de anestezie regională relativ
nouă care asigură analgezia peritoneului parietal, precum și pielea, mușchi ale peretelui
abdominal anterior. Blocul din punct de vedere tehnic se efectuează relativ ușor, fiind raportate
doar câteva cazuri de complicații. Se pare că blocul ar avea o marjă înaltă de siguranță. Blocul
este tot mai mult folosit ca un instrument de a un instrument de analgezie postoperatorie în
chirurgia abdominală, drept parte componentă a strategiilor multi-modale de management al
durerii.
În prezent, mai mult de 100 de articole la acest subiect sunt publicate în reviste recenzate, multe
studii fiind în desfășurare. Totodată, implementarea clinică a blocurilor TAP în Republica
Moldova este destul de modestă
A side extraction PIG negative ion source with a permanent magnet
No full textA side extraction PIG ion source with a permanent magnet is introduced, which can be used not only for producing miliampere positive ion beams, but also for direct extraction of negative ions of some elements with larger electron affinity. So far H, O, and F negative ions have been extracted from the source. At -15 kV extraction voltage, O- ion beams of 130 mu A and a F- ion beam of 75 mu A are extracted, and the discharge power consumption is 110 and 280 W, respectively. (C) 1996 American Institute of Physics.Instruments & InstrumentationPhysics, AppliedSCI(E)
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