Academic literature on the topic 'Full-field ERG'
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Journal articles on the topic "Full-field ERG"
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Hochstein, Grant D., Fanni E. Molnar, and Michael F. Marmor. "Intrasession variability of the full-field ERG." Documenta Ophthalmologica 115, no. 2 (May 9, 2007): 77–83. http://dx.doi.org/10.1007/s10633-007-9057-x.
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Hood, Donald C., William Seiple, Karen Holopigian, and Vivienne Greenstein. "A comparison of the components of the multifocal and full-field ERGs." Visual Neuroscience 14, no. 3 (May 1997): 533–44. http://dx.doi.org/10.1017/s0952523800012190.
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AbstractThe multi-input technique of Sutter and Tran (1992) yields multiple focal ERGs. The purpose here was to compare the components of this multifocal ERG to the components of the standard, full-field ERG. To record multifocal ERGs, an array of 103 hexagons was displayed on a monitor. Full-field (Ganzfeld) ERGs were elicited by flashes presented upon steady background fields. The latencies of two prominent subcomponents of the full-field ERG were altered by varying the intensity of the incremental flash or the intensity of the background field. By showing that similar manipulations of the multi-input parameters produce similar changes in latency, we were able to relate the components of the multifocal ERG to the components of the full-field ERG. The biphasic responses of the multifocal ERG appear to be generated by the same cells generating the a-wave and positive peaks of the full-field cone ERG.
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Tzekov, Radouil. "Full-field ERG in diabetic retinopathy: a screening tool?" Graefe's Archive for Clinical and Experimental Ophthalmology 253, no. 7 (May 9, 2015): 987–88. http://dx.doi.org/10.1007/s00417-015-3037-8.
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Machida, Shigeki, Kunifusa Tamada, Taku Oikawa, Yasutaka Gotoh, Tomoharu Nishimura, Muneyoshi Kaneko, and Daijiro Kurosaka. "Comparison of Photopic Negative Response of Full-Field and Focal Electroretinograms in Detecting Glaucomatous Eyes." Journal of Ophthalmology 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/564131.
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Purpose. To compare the photopic negative response (PhNR) of the full-field electroretinogram (ERG) to the PhNR of the focal ERGs in detecting glaucoma.Methods. One hundred and three eyes with glaucoma and 42 normal eyes were studied. Full-field ERGs were elicited by red stimuli on a blue background. The focal ERGs were elicited by a15∘white stimulus spot centered on the macula, the superotemporal or the inferotemporal areas of the macula.Results. In early glaucoma, the areas under the receiver operating characteristic curves (AUCs) were significantly larger for the focal PhNR (0.863–0.924) than those for the full-field PhNR (0.666–0.748) (P<.05). The sensitivity was significantly higher for the focal PhNR than for the full-field PhNR in early (P<.01) and intermediate glaucoma (P<.05). In advanced glaucoma, there was no difference in the AUCs and sensitivities between the focal and full-field PhNRs.Conclusions. The focal ERG has the diagnostic ability with higher sensitivity in detecting early and intermediate glaucoma than the full-field ERG.
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Blum, Maren-Christina, Lilly Leydolph, and Sascha Klee. "Influence of electric field orientation on the effect of ocular current stimulation using full field electroretinogram." Current Directions in Biomedical Engineering 7, no. 2 (October 1, 2021): 167–70. http://dx.doi.org/10.1515/cdbme-2021-2043.
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Abstract Ocular current stimulation (CS) exhibits potential for the treatment of neurodegenerative ocular diseases. For a full field electroretinogram (ffERG) we found no CS effect on the characteristic waves (a-wave, b’-wave, and b-wave). To investigate whether the orientation of the generated electric field has an influence on the CS effect, this study repeated the previous ffERG study with changing one CS electrode position and compared the results of both studies. In the first study 15 (8 m, 27.5 ± 4.5 years) and in the second study 17 (7 m, 22.0 ± 1.9 years) healthy volunteers were stimulated with an anodal, cathodal, and sham direct CS of 800 μA for 5 min in three sessions (randomized, different days). For both studies, a cut-sized ring rubber electrode was placed around the eye. A square rubber electrode was placed for the first study at the ipsilateral temple and for the second study at the visual cortex. Before (ERG 1) and during (ERG 2) the CS, the ffERG was measured. For both studies, the difference between the ERG 1 and ERG 2 measurement (CS effect) for the three characteristic waves was analyzed and compared between the studies. For statistical analysis, the Mann-Whitney U test with Bonferroni correction was applied (α = 0.05). The comparison of the data distribution showed only slight differences between the studies. The Mann-Whitney U test found no significant difference of the CS effect between the studies for all amplitudes and CS groups (p ≥ 0.0055). In the mean, the latency differences were smaller than the time resolution, therefore no statements for latency effects were possible. It can be concluded that the retinal cells generating the ffERG are not affected by ocular CS in either electrode montages tested.
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Ponjavic, Vesna, Lotta Granse, Elisabeth Bengtsson Stigmar, and Sten Andreasson. "Reduced full-field electroretinogram (ERG) in a patient treated with methotrexate." Acta Ophthalmologica Scandinavica 82, no. 1 (February 2004): 96–99. http://dx.doi.org/10.1046/j.1600-0420.2003.00181.x.
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Robson, A. G., C. Pavesio, E. M. Graham, and G. E. Holder. "The role of pattern ERG and full-field ERG in the characterisation and management of birdshot chorioretinopathy." Clinical Neurophysiology 118, no. 5 (May 2007): e166-e167. http://dx.doi.org/10.1016/j.clinph.2006.07.270.
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Schieding, Nikola, Thomas Reuter, Andreas Grundmann, Sebastian Walther, and Sascha Klee. "Full-field electroretinography examinations of the human eye with the eye diagnostic device PEP-2000 – First results." Current Directions in Biomedical Engineering 8, no. 2 (August 1, 2022): 636–39. http://dx.doi.org/10.1515/cdbme-2022-1162.
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Abstract Full-field electroretinography (full-field ERG) forms the diagnostic basis for numerous pathologies of the eye. For this reason, fast and accurate diagnostics in the field of ophthalmology are essential. Two examination techniques, full-field ERG and pupillometry were combined in a diagnostic device developed by ICM e.V. to reduce the examination process for both examiners and patients. In this paper, the device is examined for the quality of the full-field ERG measurements. A feasibility study with 12 healthy subjects (3 f, 9 m, 36.33 ± 11.94 years) was conducted to evaluate the device. The results showed that the peak times for both light- and dark-adapted measurements were within the range of the researched literature values. However, the amplitudes were markedly lower in both measurements compared to the averaged literature values (dark-adapted about 8.5-fold and light-adapted about 5.5-fold) and are clearly outside the range of values researched. The main reason for this is the use of cup electrodes, which were placed on the skin of the lower eyelid. Nevertheless, plausible and comparable analysis values could be obtained with the eye diagnostic device PEP-2000. Further studies with wire electrodes will be performed.
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Safatle, Angélica M. V., Ana Paula Hvenegaard, Denise Otsuki, Terezinha L. Martins, Márcia Kahvegian, Adriana Berezovsky, Solange R. Salomão, and Paulo S. M. Barros. "Comparison of full-field electroretinogram in diabetic and non diabetic dogs with cataracts." Pesquisa Veterinária Brasileira 30, no. 12 (December 2010): 1071–76. http://dx.doi.org/10.1590/s0100-736x2010001200012.
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Being the commonest ocular disorder, dense cataracts disable fundoscopic examination and the diagnosis of retinal disorders, which dogs may be predisposed. The aim of this study was to compare the electroretinographic responses recorded according to the International Society for Clinical Electrophysiology of Vision human protocol to evaluate retinal function of diabetic and non diabetic dogs, both presenting mature or hypermature cataracts. Full-field electroretinogram was recorded from 66 dogs, with ages varying from 6 to 15 years old allocated into two groups: (1) CG, non diabetic cataractous dogs, and (2) DG, diabetic cataractous dogs. Mean peak-to-peak amplitude (microvolts) and b-wave implicit time (milliseconds) were determined for each of the five standard full-field ERG responses (rod response, maximal response, oscillatory potentials, single-flash cone response and 30 Hz flicker). Comparing CG to DG, ERGs recorded from diabetic dogs presented lower amplitude and prolonged b-wave implicit time in all ERG responses. Prolonged b-wave implicit time was statistically significant (p< 0.05) at 30 Hz flicker (24.0 ms versus 22.4 ms). These data suggests full-field ERG is capable to record sensible alterations, such as flicker's implicit time, being useful to investigate retinal dysfunction in diabetic dogs.
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Granse, Lotta, Vesna Ponjavic, and Sten Andreasson. "Full-field ERG, multifocal ERG and multifocal VEP in patients with retinitis pigmentosa and residual central visual fields." Acta Ophthalmologica Scandinavica 82, no. 6 (December 2004): 701–6. http://dx.doi.org/10.1111/j.1600-0420.2004.00362.x.
Full textBooks on the topic "Full-field ERG"
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Sadler, John Z., C. W. van Staden, and K. W. M. Fulford. Introduction. Edited by John Z. Sadler, K. W. M. Fulford, and Cornelius Werendly van Staden. Oxford University Press, 2015. http://dx.doi.org/10.1093/oxfordhb/9780198732365.013.1.
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TheOxford Handbook of Psychiatric Ethicsis the most comprehensive treatment of the field in history. The editors briefly describe the goals, scope, and organization of the book. Major themes and the state of the field in the twenty-first century are then addressed. Psychiatric ethics is an excellent framework to examine social changes in psychiatry over the past 25 years. These include multiculturalism and its associated diversity of values; the transition to the digital era with new demands on confidentiality, clinical boundaries, and privacy; the empowerment of psychiatric service users as full participants and co-producers of care; the development of new technologies of assessment and treatment, varying in their invasiveness and risk; the recognition of expanded social roles for psychiatrists, and the associated virtues of psychiatric citizenship; and the development of new practice models, settings, participants, and oversight—representing profound challenges and opportunities for the ethical practice of psychiatry.
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Tyler, Daniel, ed. On Style in Victorian Fiction. Cambridge University Press, 2021. http://dx.doi.org/10.1017/9781108614931.
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Some writers of the Victorian period, as well as more recent critics, have argued that the prose style of Victorian fiction aims to efface itself or that an absence of style may in itself represent the nineteenth-century ideal. This collection provides a major assessment of style in Victorian fiction and demonstrates that style - the language, techniques and artistry of prose - is inseparable from meaning and that it is through the many resources of style that the full compass of meaning makes itself known. Leading scholars in the field present an engaging assessment of major Victorian novelists, illustrating how productive and illuminating close attention to literary style can be. Collectively, they build a fresh and nuanced understanding of how style functioned in the literature of the nineteenth century, and propose that the fiction of this era demands we think about what style does, as much as what style is.
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Hutson, Mike. Assessment and management. Oxford University Press, 2013. http://dx.doi.org/10.1093/med/9780199533909.003.0011.
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Individuals undertaking exercise include those engaged in aerobic activities as part of a healthy lifestyle, those engaged in an active fitness or rehabilitation programme relevant to acute or chronic conditions such as cardiovascular disease, respiratory problems, and musculoskeletal disorders, and the committed competitive athlete with high performance targets. Accordingly, those injured as a consequence of exercise or sport attend medical practitioners in diverse circumstances. Urgency of assessment of the full impact of injury clearly varies across the spectrum from the life-threatening situation on the field of play (or other sports/recreational exercise location, for instance poolside or roadside) to one in which a chronic condition can be evaluated in the relative comfort of the clinician’s consulting room. Irrespective of the circumstances, the primary requirement is the establishment of an accurate diagnosis. The process of assessment is aided when relevant by an appropriate index of suspicion with respect to those injuries that are not often seen outside sporting and recreational activity (e.g. throwers’ elbow and shin splints). Diagnosis of tissue injury is followed by a full assessment of its impact on the function of the surrounding structures, and subsequently assessment of impairment of sporting capacity in general. Evaluation is made of the aetiological factors associated with the development of injury, the behavioural responses, including motivation and health prioritization, and the individual’s standard of performance (actual and potential). Clinical assessment (and reassessment) is a constant theme throughout the text....
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Viola, Judah J., and Olya Glantsman, eds. Diverse Careers in Community Psychology. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780190457938.001.0001.
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The goal of Diverse Careers in Community Psychology is to (1) highlight the diversity of career options for someone with community psychology training; (2) provide details about the different types of careers (e.g., tasks involved, benefits and challenges, salary range, and so on); and (3) list the steps one can take to develop skills and position oneself for such a career. This text provides a better understanding of the diverse career options available for people who train in community psychology (CP), and how the CP competencies are put into practice across the full spectrum of job titles and career paths that a community psychologist might follow. The book includes 23 chapters authored by 30 different community psychologists with various backgrounds, interests, and areas of expertise, who provide examples of what it is like to work in their settings. The book also includes a summary of a first-of-its-kind career survey of over four hundred individuals in the field. It is our hope that this text will help current, prospective, and former students in community psychology and related fields, as well as professionals interested in expanding or changing their careers, to find an ideal career path.
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Sommerville, Diane Miller. Aberration of Mind. University of North Carolina Press, 2018. http://dx.doi.org/10.5149/northcarolina/9781469643304.001.0001.
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Aberration of Mind is a social history of suicide in the American South during the Civil War era. The book casts a wide net, focusing on Confederate soldiers and veterans and their families, and the enslaved and newly freed. The central question is, how did the Civil War and the suffering it generated shape suicidal thoughts and behavior? The author seeks to understand how the suffering experienced by southerners living in a war zone contributed to psychological distress that, in extreme cases, led southerners to contemplate or act on suicidal thoughts. The unprecedented human toll the war took on southerners created a psychological crisis that has not been fully explored. Drawing on sources like letters, diaries, military service records, coroners’ reports, and asylum patient case histories, the work recovers myriad stories, previously hidden, of individuals exhibiting suicidal activity or aberrant psychological behavior linked to the war and its aftermath. In addition to expanding our understanding of the full human costs of the Civil War, the book concludes that southerners transformed the meaning of suicide from an act of cowardice to a heroic symbol of white southern identity. The book fills a neglected niche in an otherwise crowded field of Civil War scholarship – the psychological impact of war and defeat on southerners.
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Messner, Michael A. Unconventional Combat. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197573631.001.0001.
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Unconventional Combat illuminates the generational transformation of the U.S. veterans’ peace movement, from one grounded mostly in the experiences of White men of the Vietnam War era, to one increasingly driven by a younger and much more diverse cohort of “post-9/11” veterans. Participant observation with two organizations (Veterans For Peace and About Face) and interviews with older men veterans form the backdrop for the book’s main focus, life-history interviews with six younger veterans—all people of color, three of them women, one a Native Two-Spirit person, one a genderqueer non-binary person. The book traces these veterans’ experiences of sexual and gender harassment, sexual assault, racist and homophobic abuse during their military service (some of it in combat zones), centering on their “situated knowledge” of intersecting oppressions. As veterans, this knowledge shapes their intersectional praxis, which promises to transform the veterans’ peace movement, and provides a connective language through which veterans’ anti-militarism work links with movements for racial justice, stopping gender and sexual violence, addressing climate change, and building anti-colonial coalitions. This promise is sometimes thwarted by older veterans, whose commitment to “diversity” often falls short of creating organizational space for full inclusion of previously marginalized “others.” Intersectionality is the analytic coin of today’s emergent movement field, and the connective tissue of a growing coalitional politics. The veterans that are the focus of this book are part of this larger shift in the social movement ecology, and they contribute a critical understanding of war and militarism to progressive coalitions.
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Ross, Lainie Friedman, and J. Richard Thistlethwaite, Jr. The Living Organ Donor as Patient. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197618202.001.0001.
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This is a book about living solid organ donors as patients in their own right. This book is premised on the supposition that the field of living donor organ transplantation is ethical, even if some specific applications are not, eg, pre-mortem organ procurement of an imminently dying patient. When Joseph Murray performed the first successful living kidney donor transplant in 1954, he thought this would be a temporary stopgap. Today, however, the goal of adequate organ supply without living donors remains elusive. If anything, the supply:demand ratio is worse. In this book, a five-principle living donor ethics framework is developed and used to examine the ethical issues raised by living donor selection demographics, innovative attempts to increase living organ donation, and living donor decision-making and risk thresholds. This ethics framework uses the three principles of the Belmont Report modified to organ transplantation (respect for persons, beneficence, and justice) supplemented by the principles of vulnerability and of special relationships creating special obligations. The approach requires that the transplant community fully embraces living organ donors (and prospective living organ donors) as patients to whom special obligations are owed. Only when living organ donors are regarded as patients in their own right and have a living donor advocate team dedicated to their well-being can the moral boundaries of living solid organ donation be determined and realized. This book provides theoretical arguments and practice guidelines, complemented by case studies, to ensure that living donors are given the full respect and care they deserve.
Book chapters on the topic "Full-field ERG"
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Levander, Sara, Eva Forsberg, Sverker Lindblad, and Gustaf J. Bjurhammer. "Typecasting in the Recruitment of Full Professors." In Peer review in an Era of Evaluation, 327–46. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-75263-7_14.
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AbstractThe recruitment of full professors is critical for the formation of academia. The professorship is critical not only for the prosperity of the HEIs, but especially so for the establishment, development and communication of the discipline. In this chapter, we analyze the initial step of the typecasting process in the recruitment of full professors. We use a few cases to illustrate how the intellectual and social organization of the field of education science(s) is manifested in publicly posted job advertisements. The analysis shows that the field is characterized by heterogeneity and no longer has a basis in one single discipline. New relations between research, teaching, and society can be observed, as well as a narrowing of authority of the professorship but an increase of responsibilities.
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López-Márquez, Arístides, Ainhoa Martínez-Pizarro, Belén Pérez, Eva Richard, and Lourdes R. Desviat. "Modeling Splicing Variants Amenable to Antisense Therapy by Use of CRISPR-Cas9-Based Gene Editing in HepG2 Cells." In Methods in Molecular Biology, 167–84. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2010-6_10.
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AbstractThe field of splice modulating RNA therapy has gained new momentum with FDA approved antisense-based drugs for several rare diseases. In vitro splicing assays with minigenes or patient-derived cells are commonly employed for initial preclinical testing of antisense oligonucleotides aiming to modulate splicing. However, minigenes do not include the full genomic context of the exons under study and patients’ samples are not always available, especially if the gene is expressed solely in certain tissues (e.g. liver or brain). This is the case for specific inherited metabolic diseases such as phenylketonuria (PKU) caused by mutations in the liver-expressed PAH gene.Herein we describe the generation of mutation-specific hepatic cellular models of PKU using CRISPR/Cas9 system, which is a versatile and easy-to-use gene editing tool. We describe in detail the selection of the appropriate cell line, guidelines for design of RNA guides and donor templates, transfection procedures and growth and selection of single-cell colonies with the desired variant, which should result in the accurate recapitulation of the splicing defect.
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Margetts, Helen, and Cosmina Dorobantu. "Computational Social Science for Public Policy." In Handbook of Computational Social Science for Policy, 3–18. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-16624-2_1.
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AbstractComputational Social Science (CSS), which brings together the power of computational methods and the analytical rigour of the social sciences, has the potential to revolutionise policymaking. This growing field of research can help governments take advantage of large-scale data on human behaviour and provide policymakers with insights into where policy interventions are needed, which interventions are most likely to be effective, and how to avoid unintended consequences. In this chapter, we show how Computational Social Science can improve policymaking by detecting, measuring, predicting, explaining, and simulating human behaviour. We argue that the improvements that CSS can bring to government are conditional on making ethical considerations an integral part of the process of scientific discovery. CSS has an opportunity to reveal bias and inequalities in public administration and a responsibility to tackle them by taking advantage of research advancements in ethics and responsible innovation. Finally, we identify the primary factors that prevented Computational Social Science from realising its full potential during the Covid-19 pandemic and posit that overcoming challenges linked to limited data flows, siloed models, and rigid organisational structures within government can usher in a new era of policymaking.
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Saccardi, Riccardo, and Fermin Sanchez-Guijo. "How Can Accreditation Bodies, Such as JACIE or FACT, Support Centres in Getting Qualified?" In The EBMT/EHA CAR-T Cell Handbook, 199–201. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-94353-0_38.
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AbstractThe FACT-JACIE accreditation system is based on a standard-driven process covering all the steps of HSC transplant activity, from donor selection to clinical care. Since the first approval of the First Edition of the Standards in 1998, over 360 HSCT programmes or facilities have been accredited at least once, most of them achieving subsequent re-accreditations (Snowden et al. 2017). The positive impact of the accreditation process in the EBMT Registry has been well established (Gratwohl et al. 2014). Starting with version 6.1, the standards include new items specifically developed for other cellular therapy products, with special reference to immune effector cells (IECs). This reflects the rapid evolution of the field of cellular therapy, primarily (but not exclusively) through the use of genetically modified cells, such as CAR-T cells. FACT-JACIE standards cover a wide range of important aspects that can be of use for centres that aim to be accredited in their countries to provide IEC therapy. Notably, FACT-JACIE accreditation itself is a key (or even a prerequisite) condition in some countries for approval by health authorities to provide commercial CAR-T cell therapy and is also valued by pharmaceutical companies (both those developing clinical trials and those manufacturing commercial products), which also inspect the cell therapy programmes and facilities established at each centre (Yakoub-Agha et al. 2020). Interest in applying for FACT-JACIE accreditation that includes IEC therapeutic programmes is clearly increasing, from four applications in 2017 to 36 applications approved in 2019. The standards do not cover the manufacturing of such cells but include the chain of responsibilities when the product is provided by a third party (Maus and Nikiforow 2017). In any case, all the steps in the process in which the centre is involved (e.g., patient or donor evaluations, cell collection, cell reception, and storage) are covered by the standards, including the appropriate agreements with the internal partners, including the pharmacy department. In addition, from a clinical perspective, IECs may require special safety monitoring systems due to the high frequency of acute adverse events related to the massive immunological reaction against the tumour. Although examples and explanations are found in the standard manual, here, the special importance of identifying and managing cytokine release syndrome (CRS) should be emphasized, and the standards focus not on specific therapeutic algorithms but on ensuring that medical and nursing teams are sufficiently trained in the early detection of this and other potential complications (e.g., neurological complications). They also pay attention to the full-time availability within the institution and its pharmacy of the necessary medication to address complications and the capacitation and involvement of Intensive Care and Neurology Department professionals to provide urgent care if needed. Forthcoming cellular therapy products, currently under investigation, will show a wider range of risk profiles, therefore requiring product-specific risk assessment and consequent adaptation of the clinical procedures for different classes of products. The FACT-JACIE standards will continue to adapt to these future needs to assist centres in their achievement of optimal clinical outcomes.
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Garland, Ann F. "Expanding the Possibilities: Populations, Settings, and Types of Work." In Pursuing a Career in Mental Health, 67–82. Oxford University Press, 2022. http://dx.doi.org/10.1093/med-psych/9780197544716.003.0006.
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Many people have limited knowledge of the full range of career opportunities in the mental health field. This chapter expands on that knowledge by introducing a wide array of possibilities beyond familiar options such as private practice. The chapter describes a range of populations (e.g., children, adults, couples), work contexts (e.g., schools, clinics, media, business, technology, government), types of work (e.g., psychotherapy, assessment, consulting, research), and specialty areas (e.g., LGBTQ+, medical issues, foster care, bereavement, brain injury, substance abuse, military). Dozens of specific examples of real jobs which draw from each of these categories are listed for inspiration. To help readers clarify their own interests, a summary of the major benefits and challenges of working with each population group is provided. The goal of this chapter is to inspire the reader’s imagination about exciting career opportunities.
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Chen, Xi, Fangming Ruan, Lvyang Zhang, and Yang Zhao. "Design of Cyberspace Security Talents Training System Based on Knowledge Graph." In Research Anthology on Advancements in Cybersecurity Education, 564–73. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-3554-0.ch029.
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Internet, big data, global society, economy, life, politics, military, and culture are deeply integrated and have developed into an era of overlapping cyberspace and real society. Cyberspace security has become the most complex, comprehensive, and severe non-traditional security challenge facing all countries in the world. However, the talents in the field of cyberspace security cannot meet the practical needs of the development of cyberspace security. This paper puts forward the training scheme of network security talents, discusses the relationship between knowledge atlas and network space security, gives the construction and distribution of network space full knowledge atlas, and then constructs an education big data architecture for cyberspace security based on knowledge graph around the use of knowledge.
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Hollinger, David A. "Communalist and Dispersionist Approaches to American Jewish History in an Increasingly Post-Jewish Era." In After Cloven Tongues of Fire. Princeton University Press, 2013. http://dx.doi.org/10.23943/princeton/9780691158426.003.0007.
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This chapter develops an analogy between post-Protestant and post-Jewish cultural situations. It does so in the context of identifying and clarifying a vital issue in the study of American Jewish history: to what extent is that field properly focused on communal Jewry and to what extent might its focuses be expanded to take full account of what persons of Jewish origin have done in the world, regardless of the degree of Jewish identity they, themselves, proclaim? The chapter pulls together arguments that the author has offered over the course of thirty-five years of writing about the Jewish experience in twentieth-century America. Thus, it connects After Cloven Tongues of Fire with an earlier collection, Science, Jews, and Secular Culture. A theme of several essays in each of these two volumes is the disruptive effect Jews have had on the cultural hegemony of Protestants in American life.
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Agostinho, Carlos, Ricardo Jardim-Goncalves, and Adolfo Steiger-Garcao. "Underpinning EISB with Enterprise Interoperability Neighboring Scientific Domains." In Standards and Standardization, 1550–81. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8111-8.ch071.
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Over the last decade, interoperability appeared as a key enabler towards unlocking the full potential of enterprises, products, processes, and systems. With methods to support their lifecycle, contributing towards removing communication barriers, and fostering a new-networked business culture in industrial domains, Enterprise Interoperability (EI) requires tangible scientific foundations. This chapter recognizes that, in terms of content, any scientific field exists in an ecosystem of neighboring domains and presents a methodology to identify EI's relationship with its neighbors, thus supporting the foundations of EI Science Base (EISB). It can be agreed that formalisms like logic and mathematics are an integrant part of every science, but others also share relationships such as application fields' boundaries, methodologies, techniques, or even tools. With the support of the European Commission, through the Future Internet and Enterprise Systems (FInES) cluster of research projects, the authors have initiated an analysis of comprehensive domains (e.g. complexity and software).
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Tao, Yun, Rosti Lemdiasov, Arun Venkatasubramanian, and Marshal Wong. "Segmented Coil Design Powering the Next Generation of High-efficiency Robust Micro-implants." In Wireless Power Transfer - Perspectives and Application [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.105789.
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The next generation of Micro Active Implantable Medical Devices (M-AIMD) are small (< 1 cc), wireless, as well as battery-less. They are located in different parts of the body ranging from brain computer interface electrode arrays (e.g., Blackrock Neurotech Utah Array) to multi-chamber cardiac pacemakers (e.g., Abbott dual chamber Nanostim device). These devices require efficient charging and powering solutions that are very challenging to design. Such solutions require the careful balancing of multiple design parameters such as size, separation distance, orientation, and regulatory limits for emission and tissue safety. In this article, we introduce unique optimisation metrics for designing efficient transmit and receive coils for near-field magnetics-based charging solutions. We elaborate on how the metrics need to be altered depending on the regulatory limits. We discuss the impact of body tissue loading on transmit and receive coil performance using circuit analysis. We introduce a novel “segmented” transmit coil arrangement. We discuss the physics of segmentation, and we build a full wave simulation model, with practical design procedure, which is verified with measurements. Finally, we compare the near fields with and without tissue loading to show that segmented coils offer significant improvement to the performance and robustness of a wireless power transfer system.
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"Children and Parenting." In Cultural China 2021: The Contemporary China Centre Review, 57–70. University of Westminster Press, 2022. http://dx.doi.org/10.16997/book69.e.
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The four pieces of this chapter explore changing discourses of childhood and parenting in the PRC. Orna Naftali examines children and war education in the PRC during the Maoist era, showing the complex and continual debates between disparate views of childhood, pedagogy, and violence. Carl Kuber explores the connections between ideas about childhood in the 1950s and more recent child-oriented developments, such as the three-child policy, curtailing of after-school tutoring, new restrictions on videogaming. Jing Xu, drawing from her field research at a private Shanghai preschool, discusses some of the pressures and anxieties among middle class parents about raising a ‘good child’. Fei Huang looks at social media discourses about stay-at-home fathers in China and reflects on how this emergent gendered identity is represented in today’s digital China. Chapter Contents: 4.1 What is a ‘Good Child’? Raising Children in a Changing China Jing Xu 4.2 Chinese Childhoods, Then and Now Carl Kubler 4.3 Children and War Education in Maoist China (1949–1976) Orna Naftali 4.4 Social Media Discourse on Stay-at-Home Fathers in China: Full-Time Father, Part-Time Worker Fei Huang
Conference papers on the topic "Full-field ERG"
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Song, Shaopin, Pingsha Dong, and Jinmiao Zhang. "A Full-Field Residual Stress Profile Estimation Scheme for Pipe Girth Welds." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78560.
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For supporting fitness-for-service (FFS) assessment, this paper presents a method for providing a full field description of through-thickness residual stress profiles for pipe girth welds, beyond weld locations (e.g., at weld centerline and weld toe). The paper starts with a brief introduction of the finite element modeling procedure used in this study. Experimental validations are performed for a pipe weld geometry on which detailed experimental data have recently become available in the literature. Then, a large number of parametric residual stress analyses are performed to identify key parameters that govern through-thickness residual stress distribution characteristics. These parameters are not only shown to uniquely contribute to some of the important residual stress distribution characteristics of interest to FFS, but also can be formulated, to the first approximation, using basic mechanics and physics principle. Finally, a detailed application of the proposed full field residual stress estimation scheme is illustrated for various girth weld conditions.
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Ahmad, Jamal, Ravi Shekhar, and Naeema Ahmed Mohamed. "Full Field Karst Features Characterization Using Reflection Seismic Attributes and Calibration with Diffraction Seismic in a Giant Offshore Carbonate Field, UAE." In SPE Reservoir Characterisation and Simulation Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/212645-ms.
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Abstract Identifying key geological features (e.g. karsts, faults, fractures) are extremely important for well planning and mitigating drilling hazards. To identify and characterize these features, a high-resolution diffraction study was conducted in a pilot area which successfully detected and mapped subtle geological features. Subsequently, existence of these karst/cave like features in the field also assist in disposing produced water as two produced water disposal wells were successfully drilled. The field is expected to double water production in next 10 years therefore targeting these karst features is expected to improve disposal well performance Application of diffraction imaging in a pilot area distinctively improved spatial resolution in order to enhance the detections of the edges and confirmed high-resolution subsurface imagining compared to conventional reflection seismic. However, extending diffraction study to full field is costly, computationally extensive and require unique skill set. Hence, an attempt was made to exploit conventional seismic reflection data utilizing advanced seismic attributes (e.g. spectral decomposition) to generate high-resolution subsurface image comparable to diffraction images. Appropriate frequencies were carefully chosen and color-blended to produce such high-resolution image that confidently enhance karst collapse features distribution in the full field. Wells drilled within karsts collapse features identified from diffraction data shows two-fold water disposal increment compared to non-karst areas. Dynamic data (e.g. mud losses & PLT) supports result from diffraction seismic in the pilot area. Subsequent full field feasibility study was conducted exploiting available conventional reflection seismic data to produce similar high-resolution subsurface image. With optimum parameters selection in spectral decomposition, subsurface color-blended image produced using reflection seismic shows good correlation with diffraction seismic results within pilot area and improves confidence in imaging outside the pilot area. Results are successfully calibrated with diffraction seismic and other available dynamic data. Distribution of full field Karst collapse features are outlined confidently, which are helpful to improve future well planning and mitigating drilling hazards. One of the main challenges in the carbonate environment is to map karsts collapse and other subtle features due to their complex shapes and lack of resolution in post stack seismic. No doubt cost inhibited diffraction seismic study produced high-resolution subsurface image however, it was just an application in a small pilot area within a giant field. Integrated workflow presented in this paper save not only outsourcing cost but also produce similar results by utilizing available conventional reflection seismic data.
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Taylor, Rocky, Ian Turnbull, Eleanor Bailey-Dudley, and Rob Pritchett. "Full-Scale In-Situ Four-Point Beam Bending Field Tests on Sea Ice." In ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/omae2021-63163.
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Abstract The flexural strength of ice is not a basic material property, but rather is an estimate of the maximum stress in the outermost fiber of an ice specimen when it fails in bending. Such conditions correspond to a number of important engineering applications, such as interactions between ice and a sloping structure or between ice and ships. Ice flexural strength is therefore highly important for calculating ice pressures and forces of interest for engineering design. While there has been considerable discussion in the literature regarding scale effects related to ice crushing against a vertical structure, scale effects in relation to bending failure have received much less attention. To this end, more flexural strength data for large, full-thickness sea ice beams are needed. To address these data gaps, a field data collection program was carried out in Pistolet Bay, Newfoundland over two field seasons (2017–2018). During this program, large sea ice beams were tested in-situ using a custom four-point bending apparatus, which was comprised of several main subsystems (e.g., the ram loading system, the platen, the ubrackets, and the hydraulic system). The sea ice beams were completely cut free from the ice cover and loaded at four points, such that the center load is parallel, but opposed to, the loads at the ends of the beam. All tests were done in-situ so that no brine drainage took place and the temperature gradient remained consistent. Tests were carried out for several combinations of beam geometry, which were scaled relative to the ice thickness. In addition to flexural strength, during the Pistolet Bay field program, the physical properties of the ice were measured (temperature, salinity, density). In this paper, a description of the field apparatus, test program and results from the full-thickness in-situ four-point beam bending tests are presented, along with a discussion of practical implications and future work.
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Andrianov, Alexey, Jason Hou, Erxiao Li, Echo Liu, and Lisheng Yang. "Full-Scale Implementation of Conformance Control by Nanospheres in Large Sandstone Oil Field." In SPE Conference at Oman Petroleum & Energy Show. SPE, 2022. http://dx.doi.org/10.2118/200227-ms.
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Abstract The polymeric nanospheres (NS) is the conformance control agent significantly improving oil recovery through redistribution of water flows deep in reservoir. The operator took a decision to pilot nanospheres technology in their large sandstone Changqing oil field in China after the experimental program has been conducted proved its potential. The nanospheres pilot has been executed in the oil field, resulting in substantial oil recovery improvement and water-cut reversal. Full-field implementation began. Extensive experimental study was conducted to analyze the effect of nanospheres on oil displacement in the Changqing field. The focus of the program was on the impact of reservoir heterogeneity and effect of nanospheres on oil displacement at different permeability contrast. Coreflood experiments were conducted with dual-core set-up, where sand cores were mimicking permeability contrast of the target reservoir. The program resulted in selecting optimum injection concentration and volumes for the pilot. Nanospheres solution has been injected in the oil field, and dedicated surveillance program was executed. Water flooding is effective in heterogeneous reservoirs when the average permeability contrast is below 20. When the contrast is higher e.g. as in target reservoir with permeability ranging from 7 to 2900 mD, water flooding is less efficient, especially in low-permeability zones. Nanospheres can mitigate the negative impact of high permeability contrast by diverting flow into previously unswept reservoir layers. This improves oil recovery, chiefly from low-permeability areas. Coreflood experiments proved the feasibility – incremental oil recovery was observed at 34%. Optimum pilot injection strategy has been designed. The effectiveness of nanospheres with high permeability variation has been demonstrated in the field tests. The field results have confirmed the positive impact of nanospheres on water flooding. In one of the tests, an average oil production rate increased from 5.1 to 10.8 t/d while water-cut was reduced from 94% to 83%. Analysis confirmed that nanospheres provided efficient conformance control deep in reservoir and did not result in loss of injectivity. Chemical utilization factor achieved is more than 100 tons of oil produced per ton of chemicals injected. Treatment costs per pattern were significantly lower compared to other IOR/EOR techniques. The operator has decided to implement nanospheres for conformance control in all field. Dedicated experimental program to select and, more important, optimize conformance control in heterogeneous reservoirs will be presented. Further, the paper will describe the field trial conducted. Both experimental and field data demonstrate the relationship between the oil displacement efficiency and injection conditions for different permeability contrasts. Results of field implementation will be presented. The technology effectiveness has been confirmed and full-field implementation has started.
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Araki, Motoki. "Scale Effects on Ship Maneuverability Using RANS." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-77191.
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Predicting ship maneuverability is one of the important topics in ship engineering. However because of the huge difference between model and full scale Reynolds number (Re), it is almost impossible to predict full scale ship maneuverability using conventional methods such as model test. On the other hands, with the developments of computational technologies and computational fluid dynamics (CFD) techniques, CFD simulations are widely applied on ship maneuvering problems (e.g. Stern et al., 2011). Moreover some of the researchers start the CFD simulation with full scale Re especially on propulsion problems (e.g. Tezdogan et al., 2015) which showing reasonable results. Therefore, in this paper, captive maneuvering simulations (rudder angle test) in model/full scale Re on KVLCC2 are carried out using Reynolds-averaged Navier–Stokes (RANS) solver NAGISA (Ohashi et al., 2014) with the overset gird method UP_GRID (Kodama et al., 2012). And the results between model and full scale simulations are compared in maneuvering coefficients and flow field to reveal the scale effect on ship maneuverability.
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Surovtsev, Dmitry, Parth Joshi, and Muhammad Usman Sethi. "The Dusk of MEFS in the Digital Era of Exploration Value Creation." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21458-ms.
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Abstract The concept of minimum economic field size (MEFS) has been used by explorationists for almost four decades. MEFS is often the only filter to distinguish between a commercial and a non-commercial discovery—far before a wildcat well is drilled—to test a prospect for a working petroleum systems hypothesis. As simple as it gets, the concept started to lose traction in the 21st century as subsurface targets became more and more challenging. In the case of tight hydrocarbons, it is fairly common to observe a P90 case net present value (NPV) to be negative, a P50 case to be positive, and a P10 case to be negative again. The reason for this outcome is that a whole set of full-cycle factors, in addition to the field size, affects prospect commerciality. Their uncertainty ranges can match or exceed resource estimate uncertainty. These factors include, but are not limited to, initial productivity of development wells, estimated eltimate recovery (EUR) per well, decline curve parameters, capital investments, operating costs, and the project phases’ durations. A new way of handling the full universe of risks and uncertainties faced by modern explorers is already available in the new generation of industry-leading integrated prospect risk, resource and value assessment software. Innovators and thought leaders can already substitute MEFS with a commerciality threshold (CT) that neatly mimics board considerations at the final investment decision (FID) stage gate. Others can consider the economic chance of success (ECOS) estimated with a probabilistic full-cycle mindset, as an additional metric valuable for risk management purposes. Using fictional case studies inspired by real-life assessment situations, we discuss the additional value creation by a CT-powered workflow as compared to an MEFS-based one and explain the reasons for the key differences. The discussed workflow does not eliminate nature-specific uncertainties; neither does it reduce the geological risk. However, it helps to better understand human-controlled risks and prepare management exploration decisions with a greater degree of confidence.
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Chen, Bicheng, and Cemal Basaran. "Full Field Joule Heating Measurement of Copper Plate Using Phase Shifting Moire´ Interferometry in Microscopic Scale." In ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability. ASMEDC, 2009. http://dx.doi.org/10.1115/interpack2009-89014.
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Heat generated from Joule heating is an important factor in several failure mechanisms in microelectronic packaging (e.g. thermomigration, electromigration and etc) and large amount of the heat causes severe heat dissipation problem. It is further exaggerated by the continuous marching towards miniaturization of microelectronics. The techniques of measuring the Joule heating effects at the microscopic scale are quite limited especially for the full field measurement. Infrared microscopic imaging has been reported to measure the heat radiation by the Joule heating in the microscopic scale. Moire´ interferometry with phase shifting is a highly sensitive and a high resolution method to measure the in-plane full field strain. In this paper, it is demonstrated that the Joule heating effect can be measured by Moire´ interferometry with phase shifting at the microscopic scale. The copper sheet is used for the demonstration because of isotropic material property and well known thermal properties and parameters. The specimen was designed to minimize the out-of-plane strain and the strain caused by the thermal-structural effects. A finite element model was developed to verify the design of the structure of the specimen and the specimen was tested under different current density (input current from 0 to 24 A). Based on the research, a correlation relationship between the current density and the strain in two orthogonal directions (one in the direction of the current flow) was determined. The regression coefficients of the full field were analyzed. The experiment demonstrates the capability of measuring microscopic Joule heating effects by using Moire´ interferometry with phase shifting. The method can be further applied to the measurement of Joule heating effect in the microscopic solid structures in the electronic packaging devices.
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Hedzyk, Nazarii, and Oleksandr Kondrat. "Low-Permeable Reservoirs as High Potential Assets for EGR." In SPE Eastern Europe Subsurface Conference. SPE, 2021. http://dx.doi.org/10.2118/208555-ms.
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Abstract Natural gas fields that are being developed in Ukraine, mainly relate to the high and medium permeability reservoirs, most of which are at the final stage of field life. In this situation one of the main sources of additional gas production is unconventional fields. This paper presents the analysis of challenges concerning development of low-permeable reservoirs and experimental results of conducted research, which provide the opportunity to establish technologies for enhance gas recovery factor. For this purpose, a series of laboratory experiments were carried out on the sand packed models of gas field with different permeability (from 9.7 to 93 mD) using natural gas. The pressure in the experiments varied from 1 to 10 MPa, temperature – 22-60 °C. According to the features of low-permeable gas fields development the research of displacement desorption with carbon dioxide and inert gas stripping by nitrogen was conducted. These studies also revealed the influence of pressure, temperature, reservoir permeability and non-hydrocarbon gases injection rate on the course of adsorption-desorption processes and their impact on the gas recovery factor. According to the experimental results of relative adsorption capacity determination it can be concluded that the carbon dioxide usage as the displacement agent can lead to producing adsorbed gas by more than 30% than by using nitrogen. To remove the adsorbed gas just reservoir pressure lowering is not enough due to the nature of adsorption isotherms. Particularly at pressure decreasing by 8-10 times compared to initial reservoir pressure only about 30-40% of the total amount of initially adsorbed gas is desorbed. And at considerable reservoir pressure reduction the further deposit development is not economically profitable. According to the results it was found that in the case of nitrogen usage the most effective method is full voidage replacement at injection pressure of 0.8 of the initial reservoir pressure, and in case of carbon dioxide usage - full voidage replacement method at pressure of 0.6 of the initial reservoir pressure. Taking into account availability of N2 and CO2, N2injection is recommended for further implementation. The influence of displacement agent injection pressure on gas recovery was experimentally proved. The physical sense of the processes taking place during natural gas desorption stimulation by non-hydrocarbon gases was justified. The effect of temperature, pressure and reservoir permeability on methane adsorption capacity were determined. The mathematical model for estimating adsorbed gas amount depending on the reservoir parameters was developed. Obtained results were summarized and recommendations for practical implementation of elaborated technological solutions were suggested.
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Lendenmann, Heinz, John Olav Fløisand, and Svein Vatland. "A New Era: Large Subsea Multiphase Compressor - Driven by Subsea Adjustable Speed Drive." In Offshore Technology Conference. OTC, 2021. http://dx.doi.org/10.4043/31192-ms.
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Abstract The use of subsea processing equipment, which maintains, increases, and accelerates oil and gas production, is now more and more widespread in offshore subsea field developments. Furthermore, there is a strong drive for electrification of offshore fields, both subsea and topside, to lower emissions. To meet the technical challenges, a significant effort is put into research and technology development by academia and the industry. ABB, a specialist in electrical equipment and control systems, and OneSubsea, a specialist in subsea processing, have executed large development programs organized as Joint Industry Projects (JIPs) together with oil and gas operators. In this paper, we discuss how ABB and OneSubsea joined forces in testing and validating their respective subsea technologies as a full subsea system for subsea multiphase gas compression. This paper presents the world's first full-scale, combined subsea adjustable speed drive (ASD) and multiphase compressor (WGC6000) string test. In spring of 2020, both the ASD, and the WGC6000 reached Technology Readiness Level 4. The string test, with both units concurrently submerged, completed its witness test program in June 2020, with mapping of the WGC6000 speed and power envelope and a subsequent 24 h thermal stability run. The flawless test result confirms the strategic development road map for all the involved partners. The technologies presented in this paper are now fully qualified and available for commercial use enabling a paradigm shift in subsea oil and gas production.
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Rafiee, Javad, Pallav Sarma, Yong Zhao, Sebastian Plotno, Carlos Calad, and Dayanara Betancourt. "Combining Machine Learning and Physics for Robust Optimization of Completion Design and Well Location of Unconventional Wells." In International Petroleum Technology Conference. IPTC, 2022. http://dx.doi.org/10.2523/iptc-22214-ms.
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Abstract Various types of predictive models have been applied over the years to make quantitative decisions for unconventional development plans. These models are either very simple (e.g., type-curves) which ignore the reservoir physics or are too complex (e.g., simulation models) to be able to run for an entire field efficiently. In this paper, we propose a model for design, prediction and optimization of unconventional wells efficiently using a combination of reservoir physics with machine learning methodologies. The proposed model is the amalgamation of the state-of-the-art in machine learning and reservoir physics into a seamless full field model. The physical model ensures that model predictions are always realistic and reliable while the machine learning algorithm allows us to utilize different types of data to make a prediction which cannot be directly integrated into the physical model. The model uses a probabilistic approach to estimate P10-P50-P90 production curves to account for uncertainty in predictions. The data from more than 1800 unconventional wells in a real field is used to train and test our proposed model. The input features are completion design parameters like lateral length, proppant concentration, well spacing, etc., and the output in a full time series of expected oil production from the well. The results show that our modelʼs prediction leads to correlations of more than 0.75 for the test set which is indicative of its good predictive accuracy. The sensitivity analysis of the parameters of the model on the cumulative production shows that volume of injection fluid, length of the lateral and the proppant concentration are among the most important parameters.
Reports on the topic "Full-field ERG"
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Corriveau, L., J. F. Montreuil, O. Blein, E. Potter, M. Ansari, J. Craven, R. Enkin, et al. Metasomatic iron and alkali calcic (MIAC) system frameworks: a TGI-6 task force to help de-risk exploration for IOCG, IOA and affiliated primary critical metal deposits. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/329093.
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Australia's and China's resources (e.g. Olympic Dam Cu-U-Au-Ag and Bayan Obo REE deposits) highlight how discovery and mining of iron oxide copper-gold (IOCG), iron oxide±apatite (IOA) and affiliated primary critical metal deposits in metasomatic iron and alkali-calcic (MIAC) mineral systems can secure a long-term supply of critical metals for Canada and its partners. In Canada, MIAC systems comprise a wide range of undeveloped primary critical metal deposits (e.g. NWT NICO Au-Co-Bi-Cu and Québec HREE-rich Josette deposits). Underexplored settings are parts of metallogenic belts that extend into Australia and the USA. Some settings, such as the Camsell River district explored by the Dene First Nations in the NWT, have infrastructures and 100s of km of historic drill cores. Yet vocabularies for mapping MIAC systems are scanty. Ability to identify metasomatic vectors to ore is fledging. Deposit models based on host rock types, structural controls or metal associations underpin the identification of MIAC-affinities, assessment of systems' full mineral potential and development of robust mineral exploration strategies. This workshop presentation reviews public geoscience research and tools developed by the Targeted Geoscience Initiative to establish the MIAC frameworks of prospective Canadian settings and global mining districts and help de-risk exploration for IOCG, IOA and affiliated primary critical metal deposits. The knowledge also supports fundamental research, environmental baseline assessment and societal decisions. It fulfills objectives of the Canadian Mineral and Metal Plan and the Critical Mineral Mapping Initiative among others. The GSC-led MIAC research team comprises members of the academic, private and public sectors from Canada, Australia, Europe, USA, China and Dene First Nations. The team's novel alteration mapping protocols, geological, mineralogical, geochemical and geophysical framework tools, and holistic mineral systems and petrophysics models mitigate and solve some of the exploration and geosciences challenges posed by the intricacies of MIAC systems. The group pioneers the use of discriminant alteration diagrams and barcodes, the assembly of a vocab for mapping and core logging, and the provision of field short courses, atlas, photo collections and system-scale field, geochemical, rock physical properties and geophysical datasets are in progress to synthesize shared signatures of Canadian settings and global MIAC mining districts. Research on a metamorphosed MIAC system and metamorphic phase equilibria modelling of alteration facies will provide a foundation for framework mapping and exploration of high-grade metamorphic terranes where surface and near surface resources are still to be discovered and mined as are those of non-metamorphosed MIAC systems.
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Lee, Jusang, John E. Haddock, Dario D. Batioja Alvarez, and Reyhaneh Rahbar Rastegar. Quality Control and Quality Assurance of Asphalt Mixtures Using Laboratory Rutting and Cracking Tests. Purdue University, 2019. http://dx.doi.org/10.5703/1288284317087.
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The main objectives of this project were to review the available balanced-mix design (BMD) methodologies, understand the I-FIT and Hamburg Wheel Tracking Test (HWTT) test methods using INDOT asphalt mixtures, and to explore the application of these tests to both a BMD approach and as performance-related Quality Control (QC) and Quality Acceptance (QA) methods. Two QA mixture specimen types, plant-mixed laboratory-compacted (PMLC) and plant-mixed field-compacted (PMFC) were used in the determination of cracking and rutting parameters. Distribution functions for the flexibility index (FI) values and rutting parameters were determined for various mixture types. The effects of specimen geometry and air voids contents on the calculated Flexibility Index (FI) and rutting parameters were investigated. The fatigue characteristics of selected asphalt mixtures were determined using the S-VECD test according to different FI levels for different conditions. A typical full-depth pavement section was implemented in FlexPAVE to explore the cracking characteristics of INDOT asphalt mixtures by investigating the relationship between the FI values of QA samples with the FlexPAVE pavement performance predictions. The FI values obtained from PMFC specimens were consistently higher than their corresponding PMLC specimens. This study also found that FI values were affected significantly by variations in specimen thickness and air voids contents, having higher FI values with higher air voids contents and thinner specimens. These observations do not agree with the general material-performance expectations that better cracking resistance is achieved with lower air voids content and thicker layers. Additionally, PG 70-22 mixtures show the lowest mean FI values followed by the PG 76-22 and 64-22 mixtures. The same order was observed from the ΔTc (asphalt binder cracking index) of INDOT’s 2017 and 2018 projects. Finally, it was found that the HWTT showed reasonable sensitivity to the different characteristics (e.g., aggregate sizes, binder types, and air voids contents) of asphalt mixtures. Mixtures containing modified asphalt binders showed better rut resistance and higher Rutting Resistance Index (RRI) than those containing unmodified binders.
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Huntley, D., D. Rotheram-Clarke, R. Cocking, J. Joseph, and P. Bobrowsky. Current research on slow-moving landslides in the Thompson River valley, British Columbia (IMOU 5170 annual report). Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/331175.
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Interdepartmental Memorandum of Understanding (IMOU) 5170 between Natural Resources Canada (NRCAN), the Geological Survey of Canada (GSC) and Transport Canada Innovation Centre (TC-IC) aims to gain new insight into slow-moving landslides, and the influence of climate change, through testing conventional and emerging monitoring technologies. IMOU 5107 focuses on strategically important sections of the national railway network in the Thompson River valley, British Columbia (BC), and the Assiniboine River valley along the borders of Manitoba (MN) and Saskatchewan (SK). Results of this research are applicable elsewhere in Canada (e.g., the urban-rural-industrial landscapes of the Okanagan Valley, BC), and around the world where slow-moving landslides and climate change are adversely affecting critical socio-economic infrastructure. Open File 8931 outlines landslide mapping and changedetection monitoring protocols based on the successes of IMOU 5170 and ICL-IPL Project 202 in BC. In this region, ice sheets, glaciers, permafrost, rivers and oceans, high relief, and biogeoclimatic characteristics contribute to produce distinctive rapid and slow-moving landslide assemblages that have the potential to impact railway infrastructure and operations. Bedrock and drift-covered slopes along the transportation corridors are prone to mass wasting when favourable conditions exist. In high-relief mountainous areas, rapidly moving landslides include rock and debris avalanches, rock and debris falls, debris flows and torrents, and lahars. In areas with moderate to low relief, rapid to slow mass movements include rockslides and slumps, debris or earth slides and slumps, and earth flows. Slow-moving landslides include rock glaciers, rock and soil creep, solifluction, and lateral spreads in bedrock and surficial deposits. Research efforts lead to a better understanding of how geological conditions, extreme weather events and climate change influence landslide activity along the national railway corridor. Combining field-based landslide investigation with multi-year geospatial and in-situ time-series monitoring leads to a more resilient railway national transportation network able to meet Canada's future socioeconomic needs, while ensuring protection of the environment and resource-based communities from landslides related to extreme weather events and climate change. InSAR only measures displacement in the east-west orientation, whereas UAV and RTK-GNSS change-detection surveys capture full displacement vectors. RTK-GNSS do not provide spatial coverage, whereas InSAR and UAV surveys do. In addition, InSAR and UAV photogrammetry cannot map underwater, whereas boat-mounted bathymetric surveys reveal information on channel morphology and riverbed composition. Remote sensing datasets, consolidated in a geographic information system, capture the spatial relationships between landslide distribution and specific terrain features, at-risk infrastructure, and the environmental conditions expected to correlate with landslide incidence and magnitude. Reliable real-time monitoring solutions for critical railway infrastructure (e.g., ballast, tracks, retaining walls, tunnels, and bridges) able to withstand the harsh environmental conditions of Canada are highlighted. The provision of fundamental geoscience and baseline geospatial monitoring allows stakeholders to develop robust risk tolerance, remediation, and mitigation strategies to maintain the resilience and accessibility of critical transportation infrastructure, while also protecting the natural environment, community stakeholders, and Canadian economy. We propose a best-practice solution involving three levels of investigation to describe the form and function of the wide range of rapid and slow-moving landslides occurring across Canada that is also applicable elsewhere. Research activities for 2022 to 2025 are presented by way of conclusion.