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A thorough study of the growth of self-assembled GaN/AIN quantum dots (QDs) is reported. These QDs are grown on sapphire substrates using the Stranski-Krastanov (SK) growth mode by means of low-pressure metal organic vapor dphase epitaxy.

Education today is extremely important for the development of every country. It should prepare specialists, who are able to estimate the advantages and disadvantages of the separate regions, their economic potential on the base of the available resources, and to give the directions for future development. However, these specialists should be well prepared in different fields, most important of which regional development and geo-economics. This paper presents the 'Regional Devel­opment and Geo-economics' Degree at the University of Veliko Tarnovo, Bulgaria, its nature and the reasons for its introduction.

Enhancing the use of technology in long-term care has been identified as a key part of broader efforts to strengthen the sector in the wake of the COVID-19 pandemic. To inform such efforts, we convened a series of citizen panels, followed by a national stakeholder dialogue with system leaders focused on reimagining the long-term care sector using technology. Key actions prioritized through the deliberations convened included: developing an innovation roadmap/agenda (including national standards and guidelines); using co-design approaches for the strengthening the long-term care sector and for technological innovation; identifying and coordinating existing innovation projects to support scale and spread; enabling rapid-learning and improvement cycles to support the development, evaluation, and implementation of new technologies; and using funding models that enable the flexibility needed for such rapid-learning cycles.

Objectives: The COVID-19 pandemic is having a major impact on the lives of everyone, but in particular on the health and well-being of older people. It has also disrupted the way that individuals access services and interact with one another, and physical distancing and "Stay at Home" orders have seen digital interaction become a necessity. While these restrictions have highlighted the importance of technology in everyday life, little is known about how older adults have responded to this change. Methods: Two surveys, one in 2019 and another in 2020 collected data on a combined total of 1923 older adults aged 65 years and older in Canada. These looked at how older adults think about and use technology, with the 2020 survey additionally questioning how COVID-19 has impacted their use and attitudes towards technology. Results: While older adults feel more isolated in 2020, many feel positive about the benefits of technology and have increased technology use during the pandemic to support their health, wellness, and communication needs. Discussion: The results highlight the potential of technology for supporting older adults in various aspects of healthy aging. While these results point to the opportunities afforded by technology, challenges remain, such as how social and economic factors influence technology uptake., Competing Interests: Declaration of Conflicting Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article., (© The Author(s) 2022.)

The COVID-19 pandemic presents an unprecedented situation in which physical distancing and "stay at home" orders have increased the pressures for social isolation. Critically, certain demographic factors have been linked to increased feelings of isolation and loneliness. These at-risk groups for social isolation may be disproportionately affected by the changes and restrictions that have been implemented to prevent viral spread. In our analysis, we sought to evaluate if perceived feelings of social isolation, during the COVID-19 pandemic, was related to demographic and technology-related psychographic characteristics. Older adults across Canada were surveyed about their demographic background, their feelings concerning confidence and proficiency in technology use, and how frequently they have felt isolated during the pandemic. In total 927 responses from Canadians over 65 years old, of varying demographic characteristics were collected. Our data shows that many older adults are feeling isolated "Often" or "Some of the time" in 2020, regardless of most demographic factors that have been previously associated with increased isolation risk. However, feelings of proficiency in using technology was an important factor affecting feelings of isolation. Given that technology proficiency is a modifiable factor, and remained significant after adjustment for demographic factors, future efforts to reduce social isolation should consider training programs for older adults to improve technology confidence, especially in an increasingly digital world., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2021 Horst, Sixsmith, Simeonov and Mihailidis.)

Coordinate control of T cell proliferation, survival, and differentiation are essential for host protection from pathogens and cancer. Long-lived memory cells, whose precursors are formed during the initial immunological insult, provide protection from future encounters, and their generation is the goal of many vaccination strategies. microRNAs (miRNAs) are key nodes in regulatory networks that shape effective T cell responses through the fine-tuning of thousands of genes. Here, using compound conditional mutant mice to eliminate miR-15/16 family miRNAs in T cells, we show that miR-15/16 restrict T cell cycle, survival, and memory T cell differentiation. High throughput sequencing of RNA isolated by cross-linking immunoprecipitation of AGO2 combined with gene expression analysis in miR-15/16-deficient T cells indicates that these effects are mediated through the direct inhibition of an extensive network of target genes within pathways critical to cell cycle, survival, and memory., (Copyright © 2019 The Author(s). Published by Elsevier Inc. All rights reserved.)

Interleukin-2 (IL-2), the first cytokine that was molecularly cloned, was shown to be a T cell growth factor essential for the proliferation of T cells and the generation of effector and memory cells. On the basis of this activity, the earliest therapeutic application of IL-2 was to boost immune responses in cancer patients. Therefore, it was a surprise that genetic deletion of the cytokine or its receptor led not only to the expected immune deficiency but also to systemic autoimmunity and lymphoproliferation. Subsequent studies established that IL-2 is essential for the maintenance of Foxp3 + regulatory T cells (T reg cells), and in its absence, there is a profound deficiency of T reg cells and resulting autoimmunity. We now know that IL-2 promotes the generation, survival, and functional activity of T reg cells and thus has dual and opposing functions: maintaining T reg cells to control immune responses and stimulating conventional T cells to promote immune responses. It is well documented that certain IL-2 conformations result in selective targeting of T reg cells by increasing reliance on CD25 binding while compromising CD122 binding. Recent therapeutic strategies have emerged to use IL-2, monoclonal antibodies to IL-2, or IL-2 variants to boost T reg cell numbers and function to treat autoimmune diseases while dealing with the continuing challenges to minimize the generation of effector and memory cells, natural killer cells, and other innate lymphoid populations., (Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.)

Purpose: To develop a sensitive scale of iris transillumination suitable for clinical and research use, with the capability of either quantitative analysis or visual matching of images., Methods: Iris transillumination photographic images were used from 70 study subjects with ocular or oculocutaneous albinism. Subjects represented a broad range of ocular pigmentation. A subset of images was subjected to image analysis and ranking by both expert and nonexpert reviewers. Quantitative ordering of images was compared with ordering by visual inspection. Images were binned to establish an 8-point scale. Ranking consistency was evaluated using the Kendall rank correlation coefficient (Kendall's tau). Visual ranking results were assessed using Kendall's coefficient of concordance (Kendall's W) analysis., Results: There was a high degree of correlation among the image analysis, expert-based and non-expert-based image rankings. Pairwise comparisons of the quantitative ranking with each reviewer generated an average Kendall's tau of 0.83 ± 0.04 (SD). Inter-rater correlation was also high with Kendall's W of 0.96, 0.95, and 0.95 for nonexpert, expert, and all reviewers, respectively., Conclusions: The current standard for assessing iris transillumination is expert assessment of clinical exam findings. We adapted an image-analysis technique to generate quantitative transillumination values. Quantitative ranking was shown to be highly similar to a ranking produced by both expert and nonexpert reviewers. This finding suggests that the image characteristics used to quantify iris transillumination do not require expert interpretation. Inter-rater rankings were also highly similar, suggesting that varied methods of transillumination ranking are robust in terms of producing reproducible results.

Traditionally, the use of genomic information for personalized medical decisions relies on prior discovery and validation of genotype-phenotype associations. This approach constrains care for patients presenting with undescribed problems. The National Institutes of Health (NIH) Undiagnosed Diseases Program (UDP) hypothesized that defining disease as maladaptation to an ecological niche allows delineation of a logical framework to diagnose and evaluate such patients. Herein, we present the philosophical bases, methodologies, and processes implemented by the NIH UDP. The NIH UDP incorporated use of the Human Phenotype Ontology, developed a genomic alignment strategy cognizant of parental genotypes, pursued agnostic biochemical analyses, implemented functional validation, and established virtual villages of global experts. This systematic approach provided a foundation for the diagnostic or non-diagnostic answers provided to patients and serves as a paradigm for scalable translational research.

Health technology assessment (HTA) agencies increasingly use reviews of qualitative research as evidence for evaluating social, experiential, and ethical aspects of health technologies. We systematically searched three bibliographic databases (MEDLINE, CINAHL, and Social Science Citation Index [SSCI]) using published search filters or "hedges" and our hybrid filter to identify qualitative research studies pertaining to chronic obstructive pulmonary disease and early breast cancer. The search filters were compared in terms of sensitivity, specificity, and precision. Our screening by title and abstract revealed that qualitative research constituted only slightly more than 1% of all published research on each health topic. The performance of the published search filters varied greatly across topics and databases. Compared with existing search filters, our hybrid filter demonstrated a consistently high sensitivity across databases and topics, and minimized the resource-intensive process of sifting through false positives. We identify opportunities for qualitative health researchers to improve the uptake of qualitative research into evidence-informed policy making., (© The Author(s) 2016.)

Our objective was to explore citizens' informed and reasoned values and expectations of personalized medicine, a timely yet novel genomics policy issue. A qualitative, public deliberation study was undertaken using a citizens' reference panel on health technologies, established to provide input to the health technology assessment process in Ontario, Canada. The citizens' panel consisted of five women and nine men, aged 18-71 years, with one member selected from each health authority region. There were shared expectations among the citizens' panel members for the potential of personalized medicine technologies to improve care, provided they are deemed clinically valid and effective. These expectations were tempered by concerns about value for money and the possibility that access to treatment may be limited by personalized medicine tests used to stratify patients. Although they questioned the presumed technological imperative presented by personalized medicine technologies, they called for increased efforts to prepare the health-care system to effectively integrate these technologies. This study represents an early but important effort to explore public values toward personalized medicine. This study also provides evidence of the public's ability to form coherent judgments about a new policy issue. Concerned that personalized tests might be used to ration care, they suggested that treatment should be made available if patients wanted it, irrespective of tests that indicate little benefit. This issue raises clinical and policy challenges that may undermine the value of personalized medicine. Further efforts to deliberate with the public are warranted to inform effective, efficient and equitable translation of personalized medicine.

Despite a growing consensus that ethical and social values should be addressed in health technology assessment (HTA) processes, there exist a variety of methods for doing so. There is growing interest in involving citizens in policy development to ensure that decisions are legitimate, and reflect the broad social values of the public. We sought to bring these issues together by employing a participatory approach to elicit ethical and social values in HTA. Our primary objective was to elicit a set of ethical and social values from citizens that could be used to guide Ontario's HTA evidentiary review and appraisal process. A secondary objective was to explore the feasibility of using participatory approaches to elicit these values. A 14-person Citizens' Reference Panel on Health Technologies was established to provide input to the Ontario Health Technology Advisory Committee in developing its recommendations. A mixed methods approach was used where informed, deliberative discussions were combined with pre- and post-questionnaires, which assessed the relative importance of various ethical and social values as well as their stability over time. Over the course of five meetings, panel members progressed toward the identification of a set of core values -universal access, choice and quality care. These values were consistently prioritized as the core values that should be considered in the evaluation of health technologies and ensuing recommendations. Sustained and deliberative methods, like a citizens' panel, offer a promising approach for eliciting ethical and social values into HTA., (Copyright © 2011 Elsevier Ltd. All rights reserved.)