A Data-driven Fault Isolation and Identification Scheme for Multiple In-Phase Faults in Satellite Control Moment Gyros

A satellite can only complete its mission successfully when all its subsystems, including the attitude control subsystem, are in healthy condition and work properly. Control moment gyroscope is a type of actuator used in the attitude control subsystems of satellites. Any fault in the control moment gyroscope can cause the satellite mission failure if it is not detected, isolated and resolved in-time. Fault isolation provides an opportunity to detect and isolate the occurring faults and, if accompanied by proactive remedial actions, can avoid failure and improve the satellite reliability. It is also necessary to know the fault severity for better maintenance planning and prioritize the corrective actions. This way, the more severe faults can be corrected first. In this work, an enhanced data-driven fault diagnosis scheme is introduced for fault isolation and identification of multiple in-phase faults of satellite control moment gyroscopes that is not addressed in the literature before with high accuracy. The proposed method is based on an optimized support vector machine and an optimized support vector regressor. The results yield fault predictions with up to 95.6% accuracy for isolation and 94.9% accuracy for identification, on average. In addition, a sensitivity analysis with regards to noise, missing values, and missing sensors is done where the results show that the proposed model is robust enough to be used in real applications

Why is there no impact of the host species on the cold tolerance of a generalist parasitoid?

For generalist parasitoids such as those belonging to the Genus Aphidius, the choice of host species can have profound implications for the emerging parasitoid. Host species is known to affect a variety of life history traits. However, the impact of the host on thermal tolerance has never been studied. Physiological thermal tolerance, enabling survival at unfavourable temperatures, is not a fixed trait and may be influenced by a number of external factors including characteristics of the stress, of the individual exposed to the stress, and of the biological and physical environment. As such, the choice of host species is likely to also have implications for the thermal tolerance of the emerging parasitoid. The current study aimed to investigate the effect of cereal aphid host species (Sitobion avenae, Rhopalosiphum padi and Metopolophium dirhodum) on adult thermal tolerance, in addition to sex and size, of the aphid parasitoids Aphidius avenae, Aphidius matricariae and Aphidius rhopalosiphi. Results revealed no effect of host species on the cold tolerance of the emerging parasitoid, as determined by CTmin and Chill Coma, for all parasitoid species. Host species significantly affected the size of the emerging parasitoid for A. rhopalosiphi only, with individuals emerging from R. padi being significantly larger than those emerging from S. avenae, although this did not correspond to a difference in thermal tolerance. Furthermore, a significant difference in the size of male and female parasitoids was observed for A. avenae and A. matricariae, although, once again this did not correspond to a difference in cold tolerance. It is suggested that potential behavioural thermoregulation via host manipulation may act to influence the thermal environment experienced by the wasp and thus wasp thermal tolerance and, in doing so, may negate physiological thermal tolerance or any impact of the aphid host

E-Government Effect on Economic in Iran

Iran can more effectively harness information and communication technology (ICT) to increase competitiveness, reduce inequality, and perfect its goals that most Iranians espouse. This case study presents evidence of the importance of leadership and a broadly shared vision to drive coordination of e-development policies and programs, leverage local innovations and lessons of experience, and scale up successes for a large, diverse country. These include e-government, digital inclusion, human resource development, broadband Internet connectivity, and the expansion of the ICT industry. A more comprehensive e-development strategy at every level in Iran’s government system will require a whole of government approach and more effective coordination from near the top of the government with strong leadership and support from the chief executive. Specific efforts to develop e-leadership and promote a broad understanding of the benefits of e-development can contribute to successful implementation.   Keywords: Iran, ICT industry, e-Development, e-Leadership, e-Government

Forecasting the Impact of Information and Communication Technology on Gross Domestic Product in Iran

ICT has been considered as one of the factors that has affected productivity growth in the literature on economic growth for less than two decades. The ICT capital conveys the features of knowledge capital, so it can influence productivity growth both through capital deepening and its spillover effects. There have been many studies in the literature on the effect of ICT on GDP; however, the effect of ICT on GDP growth in the international context is less known. This study examines the relationship between ICT spillovers and GDP growth using a time series data method for Iran during 1980-2008.The result of this comparison showed that using a system approach can significantly increase the prediction accuracy. Finally, using the selected patterns, the impact of ICT on GDP for the period 2009 to 2020 is predicted. And result indicated that the impact of ICT on GDP will be increase to 2% in 2020. Keyword: Information and communication technology, gross Domestic Production, time series model, VA

FDI and ICT effects on productivity growth in Middle East countries

Economic growth theories predict that economic growth is driven by investments in Information and Communication Technology (ICT).  In this paper we studied the effects stemming from Foreign Direct Investment (FDI) and Information and Communication Technologies (ICT) on productivity growth. The analysis is based on panel data covering Middle East countries during the period 1990–2010. The growth accounting results indicate that the growth contribution of ICT and FDI was quite low this countries. The econometric results showed a positive and significant impact of ICT and FDI in these countries. Keywords: FDI, ICT, growth, productivity, economic development

Consideration the Causality between Information Communications Technology and Economic Growth in Iran

In this paper, we examine the Iran the causal relationship between information and communications technology (ICT) development and economic growth in. The Granger causality test is performed following the cointegration approach to reveal the direction of causality between ICT development and economic growth. Test results indicate that there is a long-run equilibrium relationship that runs from ICT development to economic growth in Iran; and a one-way directional causality of growth-led ICT development for Iran is evidenced. A discussion follows based on the empirical findings. Keywords: Information and communications technology, economic growth, Granger causality.

Personality Subtypes and Attachment Styles in Women Survivors of Breast and Gynecologic Cancer

Introduction: Gynecologic and breast cancers are among the types of cancer that are still highly prevalent with high rates of mortality due to lack of early diagnosis. However, these two types of cancer can be controlled by screening programs and the individual can be survived. Also, both cancers have gained the attention of mental health specialists because of impairing sexual function and issues related to body image, and fertility status among affected individuals in which, have direct effects on their adjustment and quality of life. Consequently, the aim of the current research is identify of personality subtypes and attachment styles in women who have survived from breast and gynecologic cancers.Methods: The current study is a qualitative. The participants were selected through purposive sampling method, which continued until data saturation from January to March 2018. For the data collection, the Shedler-Western Assessment Procedure (SWAP) and the Adult Attachment Interview (AAI), and for the data analysis Q-Sort scaling and comparative content analysis were used.Results: The study’s findings showed that high-functioning depressive traits and dissociation were high. However, 9 of the participants had psychological health. Also, secure attachment and preoccupied attachment patterns were the most frequent ones.Conclusion: These findings can provide clinical implications for mental variables that are involved in the remission process or the advancement of the disease in women with breast and gynecologic cancer.Declaration of Interest: Non