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Wyszukujesz frazę "Marshall, C." wg kryterium: Autor


Wyświetlanie 1-5 z 5
Tytuł:
Tool Features to Support Systematic Reviews in Software Engineering – A Cross Domain Study
Autorzy:
Marshall, C.
Kitchenham, B.
Brereton, P.
Powiązania:
https://bibliotekanauki.pl/articles/384133.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
software engineering
systematic review tools
cross-domain survery
qualitative analysis
Opis:
Context: Previously, the authors had developed and evaluated a framework to evaluate systematic review (SR) lifecycle tools. Goal: The goal of this study was to use the experiences of researchers in other domains to further evaluate and refine the evaluation framework. Method: We investigate the opinions of researchers with experience of systematic reviews in the healthcare and social sciences domains. We used semi-structured interviews to elicit their experiences of systematic reviews and SR support tools. Results: Study participants found broadly the same problems as software engineering (SE) researchers with the SR process. They agreed with the tool features we had included in our evaluation framework. Furthermore although there were some differences the majority of the importance assessments were very close. Conclusions: In the context of SRs, experiences of researchers in other domains can be useful to software engineering researchers. The evaluation framework for SR lifecycle tools appeared quite robust.
Źródło:
e-Informatica Software Engineering Journal; 2018, 12, 1; 79-115
1897-7979
Pojawia się w:
e-Informatica Software Engineering Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biennial report of the Chief of Staff of the United States Army to the Secretary of War
Autorzy:
Marshall, George C.
Powiązania:
The New York Times 1945, 10 October
Współwytwórcy:
Tasiecki, Mieczysław. Komentarz
R. B. Komentarz
Data publikacji:
1945
Tematy:
II wojna światowa (1939-1945)
Opis:
Omów.: Raport generała Marshalla / M. T.
Omów.: Zwycięstwo nad Japonią / R. B.
Omów.: Operacja "Overlord" / R. B.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Optimization of Cyclotron Production for Radiometal of Zirconium 89
Autorzy:
Dabkowski, A.
Paisey, S.
Talboys, M.
Marshall, C.
Powiązania:
https://bibliotekanauki.pl/articles/1402618.pdf
Data publikacji:
2015-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.57.uk
Opis:
Zirconium 89 ($\text{}^{89}Zr$) is a promising radionuclide for development of new PET agents due to its convenient half life of 78.4 h, $\Beta^{+}$ emission rate of 23%, low maximum energy of 0.9 MeV resulting in good spatial resolution, a stable daughter isotope of yttrium-89 ($\text{}^{89}Y$) and favorable imaging characteristics, with only one significant γ -line of 909 keV emitted during decay alongside the 511 keV positron photons. Our aim was to share over 2 years of experience of producing isotopically pure $\text{}^{89}Zr$ via the $\text{}^{89}Y(p,n)^{89}Zr$ nuclear reaction with a COSTIS Solid Target System (STS) and CYCLONE 18/9 cyclotron. We optimized the yields without producing either of the long-lived impurities $\text{}^{88}Zr$ or $\text{}^{88}Y$. The degradation of the beam energy with 400 and 500 μm thick niobium foils was tested without overheating problems within 2-6 h of irradiation. From repeated measurements of activity, it was clear that there is a bi-exponential decay of radioactivity due to the short lived $\text{}^{89m}Zr$ and $\text{}^{89}Zr$. The measured half life of the longer lived radionuclide was consistent with value for $\text{}^{89}Zr$. The energy spectrum from $\text{}^{89}Zr$ had energy peaks at 511 keV and 909 keV and was consistent with $\text{}^{89}Zr$. Production of $\text{}^{89}Zr$ with 400 ($E_{p}$ = 9.8 MeV) and 500 μ m ($E_{p}$ = 11.6 MeV) thick niobium beam degrader was achieved, without producing either $\text{}^{88}Zr$ or $\text{}^{88}Y$. It was necessary to wait at least 4 hours before measuring the activity and decay correct in order to calculate the $\text{}^{89}Zr$ activity at the end of cyclotron production. Degrading the proton beam to 10 MeV produces radionuclidically pure $\text{}^{89}Zr$ with yields from 8 to 9 MBq/μAh. Whilst this is enough for pre-clinical use, the yield is not enough for either clinical use or commercial supply. Use of thinner beam degraders (400 μm) increases the proton beam energy and increases the radionuclidic yield to 15.5 MBq/μAh whilst maintaining radionuclidic purity.
Źródło:
Acta Physica Polonica A; 2015, 127, 5; 1479-1482
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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