scholarly journals Modeling and Simulation-Based Layout Optimization for Tolerance to TID Effect on n-MOSFET

Electronics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 887
Author(s):  
Minwoong Lee ◽  
Namho Lee ◽  
Jongyeol Kim ◽  
Younggwan Hwang ◽  
Seongik Cho
Keyword(s):  
Modeling And Simulation ◽  
Radiation Damage ◽  
Damage Assessment ◽  
Radiation Tolerance ◽  
Development Costs ◽  
Simulation Based ◽  
Layout Structure ◽  
Cumulative Radiation Dose ◽  
Radiation Tolerant

In the present study, the layout structure of an n-MOSFET, which is vulnerable to radiation, was designed in a different way to enhance its tolerance to radiation. Radiation damage assessment was conducted using modeling and simulation (M&S) techniques before actual semiconductor process fabrication and radiation tests to verify its tolerance properties. Based on the M&S techniques, the role of each layer was determined to improve the radiation tolerance of semiconductors, and the layout design of an n-MOSFET with enhanced radiation tolerance was optimized. The optimized radiation-tolerant n-MOSFET design was implemented in the 0.18-um CMOS bulk process, and radiation exposure tests were conducted on the device. A cumulative radiation dose up to 2 Mrad(Si) was applied to verify its radiation-tolerant performance. Developing new devices using M&S techniques for radiation damage assessment allows reliable estimates of their electrical and radiation-tolerant properties to be obtained in advance of the actual manufacturing process, thereby minimizing development costs and time.

The Role of Sn, Zr and Hf in the Radiation Damage in II, III, IV and V Pyrochlores

2012 ◽  
Vol 1383 ◽  
Author(s):  
Karl R. Whittle ◽  
Massey de los Reyes ◽  
Mark G. Blackford ◽  
Nestor J. Zaluzec ◽  
Gregory R. Lumpkin
Keyword(s):  
Radiation Damage ◽  
Cross Section ◽  
Radiation Tolerance ◽  
User Facility

ABSTRACTCeramics based on the general compositions CaLnXNbO7 (where Ln = La, Nd and Sm, and X=Zr and Sn) have been prepared, and irradiated with 1 MeV Kr ions at the IVEM-TANDEM user facility. The radiation tolerance of these materials has been found to be less than Zr and Hf equivalents. The results also suggest that the amorphisation cross section for these materials is related to the Ln component, and is similar to those observed for Zr and Hf equivalents.

THE SOIL PATTERN AND TRENDS IN WEST COAST AGRICULTURE SINCE 1964

1981 ◽  
pp. 19-28 ◽  
Author(s):  
D.B. Wright
Keyword(s):  
West Coast ◽  
Land Development ◽  
Dairy Production ◽  
Waste Land ◽  
Development Costs ◽  
Coastal Soils ◽  
Physical Features ◽  
Soil Pattern ◽  
Great Scope

The physical features, climate and soils of the West Coast are described. Expansion since 1964 of dairy production, sheep and beef cattle numbers, and areas of improved grassland are highlighted, as is the role of the Crown in land development and settlement. While isolation and distance, development costs, river problems, and farmer attitude and knowledge are considered limitations, great scope exists for increased production by the adoption, of more intensive techniques, including horticulture on the best coastal soils, and by development of waste land.

scholarly journals Radiation Tolerance in Nano-Structured Crystalline Fe(Cr)/Amorphous SiOC Composite

Crystals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 147
Author(s):  
Qing Su ◽  
Tianyao Wang ◽  
Lin Shao ◽  
Michael Nastasi
Keyword(s):  
Amorphous Silicon ◽  
Grain Growth ◽  
Irradiation Dose ◽  
Room Temperature ◽  
Silicon Oxycarbide ◽  
Radiation Response ◽  
Radiation Tolerance ◽  
Width Direction ◽  
Cr Film ◽  
Radiation Tolerant

The management of irradiation defects is one of key challenges for structural materials in current and future reactor systems. To develop radiation tolerant alloys for service in extreme irradiation environments, the Fe self-ion radiation response of nanocomposites composed of amorphous silicon oxycarbide (SiOC) and crystalline Fe(Cr) were examined at 10, 20, and 50 displacements per atom damage levels. Grain growth in width direction was observed to increase with increasing irradiation dose in both Fe(Cr) films and Fe(Cr) layers in the nanocomposite after irradiation at room temperature. However, compared to the Fe(Cr) film, the Fe(Cr) layers in the nanocomposite exhibited ~50% less grain growth at the same damage levels, suggesting that interfaces in the nanocomposite were defect sinks. Moreover, the addition of Cr to α-Fe was shown to suppress its grain growth under irradiation for both the composite and non-composite case, consistent with earlier molecular dynamic (MD) modeling studies.

Medical students’ perceptions of the effectiveness of integrated clinical skills sessions using different simulation adjuncts

2016 ◽  
Vol 40 (4) ◽  
pp. 514-521 ◽  
Author(s):  
Muhammad Zafar
Keyword(s):  
Factor Analysis ◽  
Medical Students ◽  
Response Rate ◽  
Clinical Skills ◽  
Medical Curricula ◽  
Effective Implementation ◽  
Simulation Based

Simulation-based integrated clinical skills sessions have great potential for use in medical curricula. Integration is central to simulation efficacy. The aim of this study was to obtain medical students' perceptions toward effectiveness of integrated clinical skills sessions by using different simulation adjuncts and to know the challenges/obstacles encountered toward the implementation of such sessions. A study was conducted to obtain anonymous feedback from male ( n = 156) and female ( n = 179) medical students in years 2 and 3 during the 2014–2015 academic sessions at Alfaisal University about their perceptions of the effectiveness of integrated clinical skills sessions, uses of simulation adjuncts, and obstacles encountered toward the effective implementation of such sessions. The response rate was 93.4. Factor analysis showed data being valid and reliable. Cronbach’s α-values for effectiveness of sessions, use of simulation adjunct, and obstacles encountered were 0.97, 0.95, and 0.95, respectively. We conclude that students perceived positively the effectiveness of integrated clinical skills sessions as well as the use of simulation adjuncts, especially SPs. They suggested overcoming the obstacles and limitations of simulation. They highly valued the role of the facilitators in achieving effective sessions.

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