scholarly journals Random Pattern Testability Enhancement by Circuit Rewiring

VLSI Design ◽  
2001 ◽  
Vol 12 (4) ◽  
pp. 537-549
Author(s):  
Shih-Chieh Chang ◽  
Kwen-Yo Chen ◽  
Ching-Hwa Cheng ◽  
Wen-Ben Jone ◽  
Sunil R. Das
Keyword(s):  
Efficient Algorithm ◽  
Fault Coverage ◽  
Performance Degradation ◽  
Source Node ◽  
Random Pattern ◽  
The Poor ◽  
Self Testing ◽  
Hardware Overhead ◽  
And Performance

Generally, there exist random-pattern resistant faults that result in the poor fault coverage in Build-In Self-Testing (BIST) scheme. In this paper, we propose a method to enhance the random pattern testability by a circuit restructuring technique, called circuit rewiring. The basic idea of rewiring is to replace a wire by another wire with the circuit functionality remaining unchanged. For two types of rewiring, fanin rewiring and fanout rewiring, we first analyze the testability change for each type of wire replacement. Based on the analysis, an efficient algorithm is given to enhance circuit testability. For a poor observability node, we try to increase its observability by adding an additional fanout to the node and removing an alternative wire whose source node has relatively good observability. The technique does not introduce any hardware overhead and performance degradation since a wire addition is followed immediately by another wire removal. Thus, it is basically cost-free when compared to other testability enhancement techniques.

scholarly journals Fault Characterization and Testability Analysis of Emitter Coupled Logic and Comparison with CMOS & BiCMOS Circuits

VLSI Design ◽  
1994 ◽  
Vol 1 (4) ◽  
pp. 261-276 ◽  
Author(s):  
M. O. Esonu ◽  
D. Al-Khalili ◽  
C. Rozon
Keyword(s):  
Fault Coverage ◽  
Performance Degradation ◽  
Fault Testing ◽  
Delay Fault ◽  
Delay Fault Testing ◽  
Transfer Characteristics ◽  
Noise Margin ◽  
Testability Analysis ◽  
And Performance ◽  
Fault Characterization

The logic behavior and performance of ECL gates under a set of defect models are examined. These are compared with equivalent set of BiCMOS and CMOS gates. It is found that logical fault testing is inadequate for obtaining a sufficiently high fault coverage, e.g., 79% for ECL versus 54% for BiCMOS and 69% for CMOS equivalent gates. Performance degradation faults such as delay, current and Voltage Transfer Characteristics (VTC) or Noise Margin (NM) faults are analyzed as applied to these gates. It is shown that logical fault testing with delay fault testing yields the highest fault coverage for BiCMOS and CMOS gates (around 95%). However, for equivalent ECL gates to attain a fault coverage of around 98%, both logical and NM fault testing have to be used.

Exposure aboard high-performance Marine craft increases musculoskeletal pain and lowers contemporary work capacity of the occupants

2020 ◽  
pp. 147509022098146
Author(s):  
Manudul Pahansen de Alwis ◽  
Riccardo LoMartire ◽  
Björn O Äng ◽  
Karl Garme
Keyword(s):  
Neck Pain ◽  
Musculoskeletal Pain ◽  
High Performance ◽  
Occupational Exposures ◽  
Performance Degradation ◽  
Individual Risk ◽  
Work Related ◽  
Lower Back ◽  
And Performance ◽  
Exposure Conditions

High-Performance Marine Craft (HPMC) occupants are currently being investigated for various psychophysical impairments degrading work performance postulating that these deteriorations are related to their occupational exposures. However, scientific evidence for this is lacking and the association of exposure conditions aboard HPMC with adverse health and performance effects is unknown. Therefore, the study estimates the prevalence of musculoskeletal pain (MSP) among HPMC occupants and the association of their work exposure with MSP and performance degradation. It also presents a criterion for evaluating the self-reported exposure severity aboard three different types of mono-hull HPMC; displacement, semi-displacement and planing, on a par with the available standard criteria for objectively measurable exposures. Furthermore, another criterion is proposed to assess the performance-degradation of HPMC occupants based on self-reported fatigue symptoms and MSP. Swedish Coast Guard HPMC occupants were surveyed for MSP, fatigue symptoms as well as for work-related and individual risk indicators using a validated web-based questionnaire. Prevalence of MSP and performance-degradation during the past 12 months were assessed and presented as a percentage of the sample. Associations of exposure conditions aboard HPMC with MSP and performance-capacity were systematically evaluated using multiple logistic regression models and expressed as odds ratio (OR). Prevalence of MSP was 72% among which lower back pain was the most prevalent (46%) followed by neck pain (29%) and shoulder pain (23%) while 29% with degraded performance. Exposure to severe conditions aboard semi-displacement craft was associated with lower back (OR = 2.3) and shoulder (OR = 2.6) pain while severe conditions aboard planing craft with neck pain (OR = 2.3) and performance-degradation (OR = 2.6). MSP is common among Swedish coast guards. Severe exposure conditions aboard HPMC are significantly associated with both MSP and performance-degradation. The spine and shoulders are the most susceptible to work-related MSP among HPMC occupants which should be targeted in work-related preventive and corrective measures.

Direct growth of graphene on rigid and flexible substrates: progress, applications, and challenges

2017 ◽  
Vol 46 (20) ◽  
pp. 6276-6300 ◽  
Author(s):  
Viet Phuong Pham ◽  
Hyeon-Sik Jang ◽  
Dongmok Whang ◽  
Jae-Young Choi
Keyword(s):  
Performance Degradation ◽  
Flexible Substrates ◽  
Graphene Growth ◽  
Transfer Processes ◽  
Direct Growth ◽  
And Performance ◽  
Insulating Substrates

A review of various strategies, including transfer-free direct graphene growth on insulating substrates, which avoids the transfer processes that cause graphene defects, residues, tears and performance degradation in graphene-based functional devices. Applications and challenges of "direct growth of graphene'' in commercialization are discussed and addressed.

On improving the training of aircraft engineers

2021 ◽  
Vol 20 (5) ◽  
pp. 865-885
Author(s):  
Leonid B. SOBOLEV
Keyword(s):  
Aviation Industry ◽  
Information Protection ◽  
Global Trends ◽  
Space Industry ◽  
The Poor ◽  
Military Aviation ◽  
And Performance ◽  
Performance Results ◽  
The Military ◽  
The U.S

Subject. The article continues the discussion about the method of training aircraft engineers to work in the military and civil segments of aviation and rocket-and-space industry. Objectives. The purpose is to improve the training of Russian engineers to work in the competitive market environment, on the basis of the analysis of experience in training the aviation engineers in leading foreign technical universities. Methods. The study rests on the comparative analysis of implementation of major projects in the military and civil segments of aviation in the U.S. and Russia, as well as programs for training aircraft engineers in both countries. Results. The analysis shows that the duration of modern large military aviation projects in both countries is the same (the comparison of cost is impossible, due to information protection in Russia), while in the civil segment of the aviation industry, Russia's lagging behind is significant both in terms of the duration of projects and performance results. One of the reasons is in the poor training of aircraft engineers to work in the competitive environment. Conclusions. It is crucial to reform Russian aviation universities in terms of conformity to global trends in multidisciplinarity and differentiation of financing and research base.

Scientific Management 2.0 – A Design Model for Experimental Research in Production Management

2014 ◽  
Vol 1018 ◽  
pp. 571-579
Author(s):  
Günther Schuh ◽  
Thomas Gartzen ◽  
Felix Basse
Keyword(s):  
Experimental Research ◽  
Theoretical Basis ◽  
Production Management ◽  
Production Systems ◽  
Scientific Management ◽  
Deterministic Models ◽  
New Approach ◽  
Technical Aspects ◽  
The Poor ◽  
And Performance

Reliable and accurate predictions on future states of production systems are the objective of production theories. In this paper, the authors determined shortcomings of current deterministic models and traced them back to the poor theoretical basis of scientific research in the area. The observations resulted in the development of the conceptScientific Management 2.0as an appropriate research methodology for production management. This new empirical approach takes into account three requirements to scientifically precise investigations: It expands existing theory by socio-technical aspects, uses embedded experiments as a profound basis for investigation and provides a design that warrants the methodical exactness required. RWTH Aachen’sDemonstration Factoryrepresents an adequate infrastructure to prove feasibility and performance of the new approach.

Sign in / Sign up

Export Citation Format

Share Document