Results 191 to 200 of about 1,384,876 (255)
Journal of Medical Imaging and Radiation Oncology, EarlyView.ABSTRACT Introduction Accurate preoperative physiological assessment is critical for high‐risk patients undergoing lung resection to predict postoperative lung function. This study compared quantitative dual‐energy CT (DECT) perfusion with SPECT/CT for lobar perfusion mapping in an at‐risk oncological cohort.
Jack Edward Liu +6 more
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Is Cone‐Beam CT Reliable for Apical Foramen Assessment? A Micro‐CT–Referenced Study
Australian Endodontic Journal, EarlyView.ABSTRACT This study evaluated the diagnostic accuracy of two cone‐beam CT (CBCT) dose protocols for identifying the number and trajectory deviation of apical foramina. Forty lower molars were scanned in Micro‐CT. Thereafter, all teeth were inserted into the mandible sockets and a titanium implant and an endodontically treated tooth with a cobalt ...
João Pedro de Lima +3 more
wiley +1 more source
Asia-Pacific Journal of Clinical Oncology, EarlyView.This meta‐analysis of 18 studies (3962 patients) demonstrates that nimotuzumab combined with chemoradiotherapy significantly improves overall survival and progression‐free survival in locally advanced head and neck squamous cell carcinoma, without increasing severe toxicity.
Chengzheng Bao +6 more
wiley +1 more source
Structure and agency in emancipatory reform: A blueprint from a Black union
American Journal of Political Science, EarlyView.Abstract The National Labor Convention of 1869, the first of its kind for African American workers, yielded a grand strategy for achieving full emancipation, in which those long subjected to domination might attain durable independence. Drawing upon decades of Black republican thought, this agenda combined macro‐level reforms targeting agrarian and ...
Benjamin T. Lynerd
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Breathing in Plants and Chaos—Cosmic Tree Events in Cameroon and Beyond
Anthropology of Consciousness, EarlyView.ABSTRACT Contemporary practices of tapping into the wisdom of ancestral trees are described through three entangled recent events lived within the context of Bantu practices in Cameroon. In the three instances, the steered or chance encounters with high potency trees were serendipitous telling moments which brought something new to the horizon.
Julie Laplante +3 more
wiley +1 more source
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Radiation Hardening in Platinum
physica status solidi (b), 1968AbstractSome measurements of the hardening introduced by fast neutrons in pure platinum are reported. It is found that the change in yield stress of neutron irradiated platinum varies as (Φt)1/2, in agreement with a lattice hardening mechanism. The rate of increase in damage, as observed with field ion microscopy in irradiated platinum, is compared ...
J. M. Galligan, M. J. Attardo
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Radiation hardening in vanadium
Journal of Nuclear Materials, 1970Abstract The effects of neutron irradiation on the tensile properties of 99.9 wt % pure vanadium are investigated in the fluence range 8 × 10 17 to 4 × 10 19 n / cm −2 ( E >1 MeV ). Vanadium is shown to display typical radiation and anneal hardening like other bodycentered cubic (bcc) transition metals.
G.R. Smolik, C.W. Chen
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IEEE Transactions on Nuclear Science, 1970
The requirement for radiation hardened registers has been identified for use with existing digital equipment to assure system survivability in nuclear radiation environments. The major problem has been that all semiconductor registers cannot be guaranteed to maintain their information after ionizing radiation transients above 5×109 rads (Si)/sec.
D. Hampel, K. J. Prost
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The requirement for radiation hardened registers has been identified for use with existing digital equipment to assure system survivability in nuclear radiation environments. The major problem has been that all semiconductor registers cannot be guaranteed to maintain their information after ionizing radiation transients above 5×109 rads (Si)/sec.
D. Hampel, K. J. Prost
openaire +1 more source
International Journal of Electronics, 2008
Historically, specialized foundry processes have been utilized to produce radiation hardened microelectronics. Radiation hardness by design techniques have been shown to be capable of producing devices of sufficient hardness to resist the deleterious effects of the natural radiation environment of space utilizing standard commercial processes.
J. W. Gambles +2 more
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Historically, specialized foundry processes have been utilized to produce radiation hardened microelectronics. Radiation hardness by design techniques have been shown to be capable of producing devices of sufficient hardness to resist the deleterious effects of the natural radiation environment of space utilizing standard commercial processes.
J. W. Gambles +2 more
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Radiation-hardened phototransistor
IEEE Transactions on Nuclear Science, 1991A radiation-hardened, monolithic, silicon bipolar phototransistor has been developed and produced. Common emitter current gain at 2 mA collector current is 225 and remains above 140 after irradiation of 1 E13 n/sq cm or 1 Mrad(Si). Device photoresponse to 820 nm light decreases about 30% after 1 Mrad(Si) exposure and 55% after 1 E13 n/sq cm irradiation
W.T. Matzen, R.A. Hawthorne, W.T. Kilian
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