Analysis and application of digital spectral warping in analog and mixed-signal testing

Spectral warping is a digital signal processing transform which shifts the frequencies contained within a signal along the frequency axis. The Fourier transform coefficients of a warped signal correspond to frequency-domain 'samples' of the original signal which are unevenly spaced along the frequency axis. This property allows the technique to be efficiently used for DSP-based analog and mixed-signal testing. The analysis and application of spectral warping for test signal generation, response analysis, filter design, frequency response evaluation, etc. are discussed in this paper along with examples of the software and hardware implementation

Strapdown calibration and alignment study. Volume 1 - Development document Final report

Calibration and alignment techniques for inertial sensing uni

Invasion threshold in heterogeneous metapopulation networks

We study the dynamics of epidemic and reaction-diffusion processes in metapopulation models with heterogeneous connectivity pattern. In SIR-like processes, along with the standard local epidemic threshold, the system exhibits a global invasion threshold. We provide an explicit expression of the threshold that sets a critical value of the diffusion/mobility rate below which the epidemic is not able to spread to a macroscopic fraction of subpopulations. The invasion threshold is found to be affected by the topological fluctuations of the metapopulation network. The presented results provide a general framework for the understanding of the effect of travel restrictions in epidemic containment.Comment: 4 pages, 2 figure

Solution of an infection model near threshold

We study the Susceptible-Infected-Recovered model of epidemics in the vicinity of the threshold infectivity. We derive the distribution of total outbreak size in the limit of large population size $N$. This is accomplished by mapping the problem to the first passage time of a random walker subject to a drift that increases linearly with time. We recover the scaling results of Ben-Naim and Krapivsky that the effective maximal size of the outbreak scales as $N^{2/3}$, with the average scaling as $N^{1/3}$, with an explicit form for the scaling function

A qualitatively driven approach to multimethod and mixed methods research

This chapter discusses the meaning of qualitatively -driven inquiry and what this is in the context of mixed and multi methods research. It distinguishes between qualitatively-driven mixed and multi methods approaches and considers why methods may be mixed using a qualitatively-driven approach. The chapter identifies some reasons for using qualitatively-driven mixed and multi method approaches and defines templates for their application. The chapter provides several research examples throughout to illustrate the insight gained with these approaches. It concludes with in-depth discussions of the value of these approaches and considers their contribution more widely to the field of mixed-methods researc

Barriers to sexual and reproductive wellbeing among Saudi women: a qualitative study

Introduction: In Saudi Arabia, sexual and reproductive health education is not offered in any formal setting, and there is a significant lack of knowledge amongst Saudi women. This study aimed to explore barriers to Saudi women’s sexual and reproductive wellbeing. // Methods: The study employed qualitative methods using semi-structured interviews with women in Riyadh, Saudi Arabia in 2019. The data were analysed using thematic analysis. // Results: Twenty-eight women were interviewed. Sexual and reproductive wellbeing is a complex matter affected by personal, familial, environmental, socio-cultural, religious, and institutional factors. Being unmarried is a significant barrier to accessing sexual and reproductive information and services, with ignorance signifying modesty and purity. Parental control acted as a barrier to acquiring knowledge and accessing essential healthcare services. Schools contribute to lack of awareness, with teachers omitting sexual and reproductive health-related subjects and evading answering questions. // Conclusions: There are multiple factors that restrict Saudi women’s access to sexual and reproductive health information and services, impacting their overall wellbeing. Research and policy efforts should be directed towards overcoming the complex barriers to Saudi women’s sexual and reproductive wellbeing. Public health initiatives are needed to improve youth, parents, and teacher’s knowledge, and improve public perceptions towards sexual and reproductive health education

Sexually transmitted infection knowledge and attitudes among Muslim women worldwide: a systematic review

Extramarital sexual relations are forbidden in Islam, and sexual health information is not readily available in Islamic communities, especially for women. This review aimed to explore sexually transmitted infection (STI) knowledge and attitudes among Muslim women worldwide. A systematic review was conducted on seven electronic databases. We included qualitative and quantitative studies of female Muslim participants of reproductive age, focusing on STI knowledge and attitudes. A narrative synthesis approach was used with thematic analysis methods. Eighteen studies conducted in 13 countries were included. Three main themes were identified: poor knowledge and misconceptions; sources of sexual health information and information needs; and cultural influences on STI knowledge and attitudes. Generally, Muslim women had poor knowledge regarding STI signs and symptoms, prevention, diagnosis and treatment, in addition to many misconceptions. Negative attitudes towards people infected with HIV/AIDS were common, and attitudes were highly influenced by misconceptions and insufficient knowledge. Infected women tended to be subjected to more blame and judgement compared to men. While the review summarises knowledge and attitudes of Muslim women worldwide, we excluded studies that did not clearly state that the study participants were Muslim women, hence many countries with Muslim populations are not represented in this review. Negative attitudes towards STIs make it harder for women to access sexual health information, STI prevention and treatment. This review highlights the need for culturally sensitive sexual health education for Muslim women. Future sex education interventions would benefit from considering the wider personal and external barriers

A Two-Stage Approach to Spatio-Temporal Analysis with Strong and Weak Cross-Sectional Dependence

© 2016 John Wiley & Sons, Ltd. An understanding of the spatial dimension of economic and social activity requires methods that can separate out the relationship between spatial units that is due to the effect of common factors from that which is purely spatial even in an abstract sense. The same applies to the empirical analysis of networks in general. We use cross-unit averages to extract common factors (viewed as a source of strong cross-sectional dependence) and compare the results with the principal components approach widely used in the literature. We then apply multiple testing procedures to the de-factored observations in order to determine significant bilateral correlations (signifying connections) between spatial units and compare this to an approach that just uses distance to determine units that are neighbours. We apply these methods to real house price changes at the level of Metropolitan Statistical Areas in the USA, and estimate a heterogeneous spatio-temporal model for the de-factored real house price changes and obtain significant evidence of spatial connections, both positive and negative.ESRC Grant. Grant Number: ES/I031626/

Factors influencing sexual and reproductive health of Muslim women: a systematic review

Background: In Islamic societies, issues related to sexual and reproductive health (SRH) are rarely discussed and considered sensitive subjects. This review aimed to identify any personal, religious, cultural, or structural barriers to SRH service and education among Muslim women worldwide. Methods: A search for qualitative and quantitative studies was conducted on seven electronic databases. A narrative synthesis using thematic analysis was conducted. Results: Fifty-nine studies were included from 22 countries: 19 qualitative, 38 quantitative and two mixed methods. Many Muslim women have poor SRH knowledge, and negative attitudes which influence their access to, and use of SRH services. Barriers to contraception use among Muslim women included a lack of basic reproductive knowledge, insufficient knowledge about contraception, misconceptions, and negative attitudes. Women had negative attitudes towards family planning for limiting the number of children but not for child spacing, which reflected religious views towards family planning. Religious and cultural beliefs were barriers to contraception use and access to SRH services and information. Family and the community have a significant impact on women’s contraceptive use and access to SRH services. Husband and family opposition played a significant role in contraception access and use. Fear of stigmatization and being labelled as having pre-marital sexual relations among unmarried women acted as the main barrier to accessing contraception and seeking SRH information and services. Conclusion: The findings reveal that there are multiple levels of factors that influence Muslim women’s SRH. Poor SRH knowledge and practices among Muslim women is complex matter that is affected by personal, community, cultural, religious factors and existing policies and regulations. All these factors overlap and are affected by each other. There is an urgent need for interventions addressing modifiable barriers to SRH education and services to improve knowledge, informed choice and access to services to facilitate better sexual and reproductive wellbeing for Muslim women. It is important to note that while this review aimed to report findings on Muslim women, we acknowledge that significant variations exist within every culture and religion

Characterization of serine proteinase expression in agaricus bisporus and coprinopsis cinerea by using green fluorescent protein and the A. bisporus SPR1 Promoter

The Agaricus bisporus serine proteinase 1 (SPR1) appears to be significant in both mycelial nutrition and senescence of the fruiting body. We report on the construction of an SPR promoter::green fluorescent protein (GFP) fusion cassette, pGreen_hph1_SPR_GFP, for the investigation of temporal and developmental expression of SPR1 in homobasidiomycetes and to determine how expression is linked to physiological and environmental stimuli. Monitoring of A. bisporus pGreen_hph1_SPR_GFP transformants on media rich in ammonia or containing different nitrogen sources demonstrated that SPR1 is produced in response to available nitrogen. In A. bisporus fruiting bodies, GFP activity was localized to the stipe of postharvest senescing sporophores. pGreen_hph1_SPR_GFP was also transformed into the model basidiomycete Coprinopsis cinerea. Endogenous C. cinerea proteinase activity was profiled during liquid culture and fruiting body development. Maximum activity was observed in the mature cap, while activity dropped during autolysis. Analysis of the C. cinerea genome revealed seven genes showing significant homology to the A. bisporus SPR1 and SPR2 genes. These genes contain the aspartic acid, histidine, and serine residues common to serine proteinases. Analysis of the promoter regions revealed at least one CreA and several AreA regulatory motifs in all sequences. Fruiting was induced in C. cinerea dikaryons, and fluorescence was determined in different developmental stages. GFP expression was observed throughout the life cycle, demonstrating that serine proteinase can be active in all stages of C. cinerea fruiting body development. Serine proteinase expression (GFP fluorescence) was most concentrated during development of young tissue, which may be indicative of high protein turnover during cell differentiatio