1,720,955 research outputs found
بررسی طیف امواج الکترومقناطیسی و نقش آنها در زندگی انسان
No full textThis research provides a comprehensive analysis of the electromagnetic spectrum and its wide-ranging effects on various aspects of human life. The primary objective of this study is to explain the physical characteristics of each part of the electromagnetic spectrum, from radio waves to gamma rays, and to examine their practical applications in areas such as communications, medicine, industry, and everyday technologies. The study employs a literature review methodology, analyzing scientific sources and reputable articles. Findings indicate that electromagnetic waves not only serve as the foundation for modern communication technologies such as Wi-Fi and mobile phones but also play a crucial role in medical diagnostics and treatment. The significance of this research lies in underscoring the indispensable role of electromagnetic waves in advancing modern civilization and improving human life.این تحقیق به بررسی جامع طیف امواج الکترومقناطیسی و تأثیرات گستردهی آنها در جنبههای مختلف زندگی انسان میپردازد. هدف اصلی این تحقیق، تبیین ویژگیهای فزیکی هر بخش از طیف امواج الکترومقناطیسی از امواج رادیوییی تا امواج گاما و بررسی کاربردهای عملی آنها در حوزههایی چون ارتباطات، طب، صنعت، و فناوریهای روزمره است. روش تحقیق بر پایه مرور منابع علمی و تحلیل مقالات معتبر انجام شده است. یافتهها نشان میدهد که امواج الکترومقناطیسی نهتنها پایهیی برای فناوریهای ارتباطی مدرن؛ مانند وایفای و تلفونهای همراه هستند، بلکه در حوزههای تشخیصی و درمانی طبی نیز نقشی کلیدی ایفا میکنند. اهمیت این تحقیق در برجسته کردن نقش غیرقابلانکار امواج الکترومقناطیسی در توسعه تمدن مدرن و افزایش کیفیت زندگی انسانها نهفته است.این تحقیق به بررسی جامع طیف امواج الکترومقناطیسی و تأثیرات گستردهی آنها در جنبههای مختلف زندگی انسان میپردازد. هدف اصلی این تحقیق، تبیین ویژگیهای فزیکی هر بخش از طیف امواج الکترومقناطیسی از امواج رادیوییی تا امواج گاما و بررسی کاربردهای عملی آنها در حوزههایی چون ارتباطات، طب، صنعت، و فناوریهای روزمره است. روش تحقیق بر پایه مرور منابع علمی و تحلیل مقالات معتبر انجام شده است. یافتهها نشان میدهد که امواج الکترومقناطیسی نهتنها پایهیی برای فناوریهای ارتباطی مدرن؛ مانند وایفای و تلفونهای همراه هستند، بلکه در حوزههای تشخیصی و درمانی طبی نیز نقشی کلیدی ایفا میکنند. اهمیت این تحقیق در برجسته کردن نقش غیرقابلانکار امواج الکترومقناطیسی در توسعه تمدن مدرن و افزایش کیفیت زندگی انسانها نهفته است
محاسبۀ انرژی کل هسته ستاره نیوترونی در پروسه تبدیل به ماده کوارک شگفت
Get PDFThis research examines the amount of energy released while converting the core of a neutron star into strange quark matter. This process plays a significant role in understanding dense matter\u27s physics and neutron stars\u27 behavior. The research method is library-based, utilizing reputable articles and books in nuclear physics and astrophysics. The study\u27s findings indicate that a considerable amount of energy is released in this process, which can influence the evolution of stars and lead to phenomena such as the formation of quark stars. The importance of this research lies in providing new insights into the structure of dense matter and how it changes under extreme pressure. In conclusion, it is found that this process can be one of the key factors in gaining a more precise understanding of the evolution and death of neutron stars, serving as an important indicator in astrophysical studies.هدف این تحقیق بررسی میزان انرژی آزاد شده در پروسه تبدیل هسته یک ستاره نیوترونی به ماده کوارک شگفت است. این پروسه نقش مهمیدر درک فزیک ماده چگال و رفتار ستارههای نیوترونی دارد. در این تحقیق از روش مروری استفاده صورت گرفته است، بهطوری که مقالات و کتب معتبر در حوزه فیزیک هستهیی و اخترفیزیک مورد بررسی قرار گرفتهاند. یافتههای تحقیق نشان میدهد که انرژی قابل توجهی در این پروسه آزاد میشود که میتواند بر تحول ستارهها تأثیرگذار باشد و به پدیدههایی مانند ایجاد ستارههای کوارکی منجر شود. اهمیت این تحقیق در ارائه بینش جدید به ساختار ماده فشرده و چگونگی تغییرات آن تحت فشارهای زیاد نهفته است. در نتیجهگیری مشخص شد که این پروسه میتواند یکی از عوامل اصلی درک دقیقتر از تکامل و مرگ ستارههای نیوترونی باشد و بهعنوان یک شاخص مهم در مطالعات اخترفزیکی در نظر گرفته شود
A Review of Recent Advances in Laser-Based Medical Imaging Techniques
No full textThis review explores the recent advancements in laser-based medical imaging techniques, highlighting their significant contributions to modern diagnostic practices. Laser technologies, including fluorescence imaging, photoacoustic imaging, and femtosecond lasers, have revolutionized non-invasive medical imaging by offering high-resolution and precise visualization of biological structures and processes. These techniques not only enhance early disease detection, particularly cancers, but also support real-time guidance during surgeries, improving patient outcomes. Furthermore, the integration of artificial intelligence (AI) has further optimized diagnostic accuracy and analysis efficiency. Despite these advancements, challenges such as high equipment costs, the need for specialized training, and a lack of standardized protocols still hinder widespread adoption in clinical settings. This review discusses the ongoing innovations in laser-based imaging, the ethical considerations surrounding AI integration, and the potential for future developments, emphasizing the importance of continued research to maximize the benefits of these technologies for patient care
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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