subject:(KEV)

Colorado State University

1. Purvis, Michael Anthony. Relativistic plasma nano-photonics for ultra-high energy density physics.

Degree: PhD, Electrical and Computer Engineering, 2014, Colorado State University

► The trapping of femtosecond laser pulses of relativistic intensity deep within ordered nanowire arrays is shown to volumetrically heat near solid density matter transforming it… (more)

Subjects/Keywords: nanowire; laser; plasma; femtosecond; keV

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APA (6^th Edition):

Purvis, M. A. (2014). Relativistic plasma nano-photonics for ultra-high energy density physics. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/88457

Chicago Manual of Style (16^th Edition):

Purvis, Michael Anthony. “Relativistic plasma nano-photonics for ultra-high energy density physics.” 2014. Doctoral Dissertation, Colorado State University. Accessed April 14, 2021. http://hdl.handle.net/10217/88457.

MLA Handbook (7^th Edition):

Purvis, Michael Anthony. “Relativistic plasma nano-photonics for ultra-high energy density physics.” 2014. Web. 14 Apr 2021.

Vancouver:

Purvis MA. Relativistic plasma nano-photonics for ultra-high energy density physics. [Internet] [Doctoral dissertation]. Colorado State University; 2014. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10217/88457.

Council of Science Editors:

Purvis MA. Relativistic plasma nano-photonics for ultra-high energy density physics. [Doctoral Dissertation]. Colorado State University; 2014. Available from: http://hdl.handle.net/10217/88457

University of Sydney

2. Ali, Muazzam. The influence of Galactic stellar structures on 511 keV positron annihilation morphology .

Degree: 2015, University of Sydney

URL: http://hdl.handle.net/2123/14148

► Galactic positrons are mostly observed indirectly from the products of their annihilation. The 511 keV photons produced by their annihilation remain the most convincing probe… (more)

▼ Galactic positrons are mostly observed indirectly from the products of their annihilation. The 511 keV photons produced by their annihilation remain the most convincing probe into their origin as they move relatively unperturbed through the interstellar medium. Presently, observations of these gamma-rays are conducted exclusively by space-bourne instruments to avoid the atmospheric background but these measurements can be difficult, costly, and, due to the energies involved, have inherently poor resolution. The current iteration of one such experiment is ESA's INTEGRAL satellite which measures 2 x 10⁴³ e+ s-1, primarily originating from the central region of the Galaxy with a low-flux background permeating the disc; there have been suggestions that the e+ flux favours negative longitudes in either the peak or the disc flux. These observations have revealed no obvious source that can account for the radiation, and the source of Galactic positrons is still intensely debated. This study takes a holistic approach to the problem, focusing on the nature and limitations of gamma-ray observations, the large scale distribution of stars involved in positron nucleosynthesis in the Galaxy and positron propagation in the interstellar medium. We use detailed density models of stars and their Galactic distribution, including the bulge/bar, thin and thick discs, to produce a density-dependent measurement of the expected flux from positron nucleosynthesis in these stars. After introducing positron propagation, we generate maps of relative Galactic annihilation flux for our models and correlate these to observations of Galactic 511 keV morphology, investigating the connection between stellar distribution and positron annihilation morphology. While considering negligible e+ diffusion in the bulge/bar, we find that the natural peak in luminosity flux to be at l₀ = - 0.35 deg, for a bulge/bar tilt angle of 11.1 deg, at a FWHM of 6 deg. This produces a negative to positive flux ratio of 1.1, providing a mechanism for a central 511 keV flux asymmetry. Although this asymmetry is unconfirmed, our results suggest that a smooth distribution of e+ annihilation sources in an extended population can be attributed to the natural distribution of stars in the Galaxy without requiring any asymmetric sources. Furthermore, we perform a best-fit between our models of relative e+ flux and Galactic disc and 511 keV data, finding a best-fit for stars in the Galaxy older than 8 Gyr, i.e., classes of older stars with a diffusion length of 1.5 kpc. Given this diffusion, the initial e+ kinetic energy we estimate to be between 100 - 200 keV. For positron nucleosynthesis, this energy corresponds most closely to the radioactive decay of 22Na, which occurs predominantly in novæ, and 26Al, from massive stars. Additionally, if we consider that positrons partially lose momentum when escaping their supernovæ sources, there may also be contributions from 56Ni and 44Ti

Subjects/Keywords: Galaxy:bulge; elementary particles; gamma-rays; positrons; 511 keV

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APA (6^th Edition):

Ali, M. (2015). The influence of Galactic stellar structures on 511 keV positron annihilation morphology . (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/14148

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ali, Muazzam. “The influence of Galactic stellar structures on 511 keV positron annihilation morphology .” 2015. Thesis, University of Sydney. Accessed April 14, 2021. http://hdl.handle.net/2123/14148.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ali, Muazzam. “The influence of Galactic stellar structures on 511 keV positron annihilation morphology .” 2015. Web. 14 Apr 2021.

Vancouver:

Ali M. The influence of Galactic stellar structures on 511 keV positron annihilation morphology . [Internet] [Thesis]. University of Sydney; 2015. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/2123/14148.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ali M. The influence of Galactic stellar structures on 511 keV positron annihilation morphology . [Thesis]. University of Sydney; 2015. Available from: http://hdl.handle.net/2123/14148

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Helsinki

3. Karhu, Anu. Kielellisen erityisvaikeuden tunnistaminen ja arviointi aikuisilla maahanmuuttajilla.

Degree: Medicinska fakulteten, 2017, University of Helsinki

URL: http://hdl.handle.net/10138/229543

► Tavoitteet: Aikuisen maahanmuuttajan suomen kielen oppimisvaikeuden taustatekijänä voi olla diagnosoimatta jäänyt kielellinen oppimisvaikeus kuten kielellinen erityisvaikeus (KEV). Suomessa ei ole aiemmin tutkittu aikuisten maahanmuuttajien ohjautumista… (more)

▼ Tavoitteet: Aikuisen maahanmuuttajan suomen kielen oppimisvaikeuden taustatekijänä voi olla diagnosoimatta jäänyt kielellinen oppimisvaikeus kuten kielellinen erityisvaikeus (KEV). Suomessa ei ole aiemmin tutkittu aikuisten maahanmuuttajien ohjautumista arviointiin ja arvioinnin toteutusta, kun taustalla on epäily kielellisestä erityisvaikeudesta. Tämän tutkimuksen tavoitteena oli lisätä tietoa siitä, miten aikuisten maahanmuuttajien kielelliseen erityisvaikeuteen viittaavia piirteitä tunnistetaan, miten arviointiin ohjaaminen toteutuu ja mitä erityiskysymyksiä liittyy arviointien toteutukseen. Menetelmät: Menetelminä tässä tutkimuksessa olivat lyhyt sähköpostikysely ja puolistrukturoitu teemahaastattelu. Aineiston keruu tapahtui maaliskuun 2016 ja helmikuun 2017 välisenä aikana. Kyselyalueena oli koko maa, ja haastattelut tehtiin yhtä lukuun ottamatta kolmen Etelä-Suomen maakunnan alueella. Lopullinen tutkimusaineisto muodostui 27:ltä terveydenhuollon asiantuntijalta ja yhdeltä opettajalta saaduista sähköpostivastauksista ja kahden S2-opettajan, kahden aikuisen maahanmuuttajan, kahden puheterapeutin ja yhden neurologian erikoislääkärin haastatteluista. Aineiston analyysissä käytettiin teoriasidonnaista sisällönanalyysia. Tulokset ja johtopäätökset: Terveydenhuollon asiantuntijoille ohjautuu vain harvoin arvioon aikuisia maahanmuuttajia KEV-epäilyn perusteella. Maahanmuuttajan ohjautumiseen puheterapia-arvioon ei ole olemassa yhtenäistä käytäntöä. KEV:n diagnosointiin aikuisella maahanmuuttajalla suhtaudutaan varauksella, sillä häiriön lisäksi monet muut taustatekijät voivat vaikuttaa henkilön oppimiskykyyn. S2-opettajat ovat avainasemassa aikuisten maahanmuuttajien kielellisten oppimisvaikeuksien tunnistamisessa ja arvioon ohjaamisessa, ja oppimisvaikeuksista hankittu erityisosaaminen auttaa heitä ongelman tunnistamisessa. Ongelman tunnistamista ja arviointiin ohjaamista voi kuitenkin hidastaa taustatietojen puuttuminen, vähäinen tieto arviointimahdollisuuksista ja oppimisvaikeuksien salaaminen. Arviointitiimin kokoonpano voi vaihdella, eikä arviointien toteutukseen ole olemassa yhtenäistä ohjeistusta tai käytäntöä. Arvioinnissa käytettävät menetelmät vaihtelevat tapauskohtaisesti, ja menetelmälliset päätökset perustuvat paljolti asiantuntijan omaan kliiniseen tuntumaan. Kliininen haastattelu on keskeinen arviointimenetelmä. Tulkilla on tärkeä rooli arvioinnissa, mutta tulkin käyttöön liittyy myös haasteita.

Subjects/Keywords: kielellinen erityisvaikeus; KEV; oppimisvaikeus; arviointi; aikuinen maahanmuuttaja; Logopaedics; Logopedia; Logopedi

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Karhu, A. (2017). Kielellisen erityisvaikeuden tunnistaminen ja arviointi aikuisilla maahanmuuttajilla. (Masters Thesis). University of Helsinki. Retrieved from http://hdl.handle.net/10138/229543

Chicago Manual of Style (16^th Edition):

Karhu, Anu. “Kielellisen erityisvaikeuden tunnistaminen ja arviointi aikuisilla maahanmuuttajilla.” 2017. Masters Thesis, University of Helsinki. Accessed April 14, 2021. http://hdl.handle.net/10138/229543.

MLA Handbook (7^th Edition):

Karhu, Anu. “Kielellisen erityisvaikeuden tunnistaminen ja arviointi aikuisilla maahanmuuttajilla.” 2017. Web. 14 Apr 2021.

Vancouver:

Karhu A. Kielellisen erityisvaikeuden tunnistaminen ja arviointi aikuisilla maahanmuuttajilla. [Internet] [Masters thesis]. University of Helsinki; 2017. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10138/229543.

Council of Science Editors:

Karhu A. Kielellisen erityisvaikeuden tunnistaminen ja arviointi aikuisilla maahanmuuttajilla. [Masters Thesis]. University of Helsinki; 2017. Available from: http://hdl.handle.net/10138/229543

University of Windsor

4. Brimmer, Everett. Backscattering of light atomic projectiles from thin gold films in the energy range 50-110 keV.

Degree: MS, Physics, 1970, University of Windsor

URL: https://scholar.uwindsor.ca/etd/6847

Subjects/Keywords: 110; 50; ATOMIC; AU; BACKSCATTERING; ENERGY; FILMS; KEV; LIGHT; PROJECTILES; RANGE; THIN

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Brimmer, E. (1970). Backscattering of light atomic projectiles from thin gold films in the energy range 50-110 keV. (Masters Thesis). University of Windsor. Retrieved from https://scholar.uwindsor.ca/etd/6847

Chicago Manual of Style (16^th Edition):

Brimmer, Everett. “Backscattering of light atomic projectiles from thin gold films in the energy range 50-110 keV.” 1970. Masters Thesis, University of Windsor. Accessed April 14, 2021. https://scholar.uwindsor.ca/etd/6847.

MLA Handbook (7^th Edition):

Brimmer, Everett. “Backscattering of light atomic projectiles from thin gold films in the energy range 50-110 keV.” 1970. Web. 14 Apr 2021.

Vancouver:

Brimmer E. Backscattering of light atomic projectiles from thin gold films in the energy range 50-110 keV. [Internet] [Masters thesis]. University of Windsor; 1970. [cited 2021 Apr 14]. Available from: https://scholar.uwindsor.ca/etd/6847.

Council of Science Editors:

Brimmer E. Backscattering of light atomic projectiles from thin gold films in the energy range 50-110 keV. [Masters Thesis]. University of Windsor; 1970. Available from: https://scholar.uwindsor.ca/etd/6847

Clemson University

5. Johns, Bethany. The Origin of the 511 keV Positron Annihilation Emission Morphology.

Degree: MS, Physics, 2008, Clemson University

URL: https://tigerprints.clemson.edu/all_theses/50

► The 511 keV positron annhilation emission from the Galactic bulge has yet to solely be attributed to any astrophysical source of positrons. The 511… (more)

Subjects/Keywords: 511 keV; galactic emission; gamma-ray; high energy astrophysics; positron annihilation; positrons; Physics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Johns, B. (2008). The Origin of the 511 keV Positron Annihilation Emission Morphology. (Masters Thesis). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_theses/50

Chicago Manual of Style (16^th Edition):

Johns, Bethany. “The Origin of the 511 keV Positron Annihilation Emission Morphology.” 2008. Masters Thesis, Clemson University. Accessed April 14, 2021. https://tigerprints.clemson.edu/all_theses/50.

MLA Handbook (7^th Edition):

Johns, Bethany. “The Origin of the 511 keV Positron Annihilation Emission Morphology.” 2008. Web. 14 Apr 2021.

Vancouver:

Johns B. The Origin of the 511 keV Positron Annihilation Emission Morphology. [Internet] [Masters thesis]. Clemson University; 2008. [cited 2021 Apr 14]. Available from: https://tigerprints.clemson.edu/all_theses/50.

Council of Science Editors:

Johns B. The Origin of the 511 keV Positron Annihilation Emission Morphology. [Masters Thesis]. Clemson University; 2008. Available from: https://tigerprints.clemson.edu/all_theses/50

University of Windsor

6. Hastings, J. W. Lynden. Radiation effects in zinc oxide:zinc under bombardment with KeV ions.

Degree: PhD, Physics, 1967, University of Windsor

URL: https://scholar.uwindsor.ca/etd/6046

Subjects/Keywords: BOMBARDMENT; EFFECTS; ION BOMBARDMENT; IONS; Ion bombardment; KEV; RADIATION; Radiation; UNDER; ZINC OXIDE; ZN; ZN0; Zinc oxide

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hastings, J. W. L. (1967). Radiation effects in zinc oxide:zinc under bombardment with KeV ions. (Doctoral Dissertation). University of Windsor. Retrieved from https://scholar.uwindsor.ca/etd/6046

Chicago Manual of Style (16^th Edition):

Hastings, J W Lynden. “Radiation effects in zinc oxide:zinc under bombardment with KeV ions.” 1967. Doctoral Dissertation, University of Windsor. Accessed April 14, 2021. https://scholar.uwindsor.ca/etd/6046.

MLA Handbook (7^th Edition):

Hastings, J W Lynden. “Radiation effects in zinc oxide:zinc under bombardment with KeV ions.” 1967. Web. 14 Apr 2021.

Vancouver:

Hastings JWL. Radiation effects in zinc oxide:zinc under bombardment with KeV ions. [Internet] [Doctoral dissertation]. University of Windsor; 1967. [cited 2021 Apr 14]. Available from: https://scholar.uwindsor.ca/etd/6046.

Council of Science Editors:

Hastings JWL. Radiation effects in zinc oxide:zinc under bombardment with KeV ions. [Doctoral Dissertation]. University of Windsor; 1967. Available from: https://scholar.uwindsor.ca/etd/6046

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