A Method of Analyzing Creep Data

1936 ◽  
Vol 3 (2) ◽  
pp. A62-A66
Author(s):  
R. G. Sturm ◽  
C. Dumont ◽  
F. M. Howell

Abstract The authors present a method for studying creep data which has been in use for the past four years at the Aluminum Research Laboratories. It is shown by graphs that a linear relationship exists between the logarithm of the creep and the logarithm of the elapsed time for a given material at ordinary room temperatures and constant stress. This is established by the fact that the logarithmic curves for a given material at a constant temperature have a constant slope for a relatively wide range of stresses. It is pointed out that the relative effect of cold working upon the strength of different metals seems to explain the behavior of the metals when failure is impending, this being indicated by the tendency of the logarithmic creep-time curves to depart from straight lines. The authors conclude that when homologous stresses based on the tensile strength of the material are considered, different materials exhibit very similar characteristics in the relationship between the homologous stress and the logarithm of the time necessary for a given amount of creep to occur.

2017 ◽  
Vol 13 (3) ◽  
pp. 33-41
Author(s):  
Akanksha Khanna ◽  
Ashwini Y. ◽  
Jilsy Varghese

Humans are considered to be different from each other with their acumen and intelligence. The working condition in IT sector has changed over the past few decades. There has been a drastic increase in the number of female employees towards the development of IT sector over the past few years. Gender diversity is creating a wide range of awareness and helps understand the importance of gender identity. IT industry which is a dominant industry in India has reckoned gender diversity as a major tool to ensure it stands on criteria of being competent and innovative in the ever changing dynamic business environment. The main objective of this paper is to analyze the relationship between acceptance of gender diversity among the employees, diversity practices and programs adopted by the IT industries and barriers to the same.


Author(s):  
William Tullett

In England during the period between the 1670s and the 1820s a transformation took place in how smell and the senses were viewed. This book traces that transformation. The role of smell in creating medical and scientific knowledge came under intense scrutiny and the equation of smell with disease was actively questioned. Yet a new interest in smell’s emotive and idiosyncratic dimensions offered odours a new power in the sociable spaces of eighteenth-century England. Using a wide range of sources from diaries, letters, and sanitary records to satirical prints, consumer objects, and magazines, William Tullett traces how individuals and communities perceived the smells around them. From paint and perfume to onions and farts, this book highlights the smells that were good for eighteenth-century writers to think with. In doing so, the study challenges a popular, influential, and often cited narrative. Smell in Eighteenth-Century England is not a tale of the medicalization and deodorization of English olfactory culture. Instead, the book demonstrates that it was a new recognition of smell’s asocial-sociability, its capacity to create atmospheres of uncomfortable intimacy, that transformed the relationship between the senses and society. To trace this shift, the book also breaks new methodological ground. Smell in Eighteenth-Century England makes the case for new ways of thinking about the history of the senses, experience, and the body. Understanding the way past peoples perceived their world involves tracing processes of habituation, sensitization, and attention. These processes help explain which odours entered the archive and why they did so. They force us to recognise that the past was, for those who lived there, not just a place of unmitigated stench


2020 ◽  
Vol 8 (2) ◽  
pp. 114-126
Author(s):  
Zuzana Součková

Abstract Teacher beliefs play an important role in addressing the issue of teacher training. Teaching philosophy has long been a question of great interest in a wide range of fields in teacher education. There is a growing body of literature that recognises the importance of what teacher trainees or teachers in general think, believe and do in teaching. Studies over the past two decades have provided important information on the possible factors that may impact the formation of teacher beliefs. The paper attempts to explore the relationship between previous school experience and the formation of teacher beliefs among teacher trainees who can provide viewpoints of a teacher and a student at the same time. Moreover, the paper examines teaching methods and techniques that the trainees apply in their teaching as a result of what they believe in as teachers. Data were obtained from semi-structured interviews conducted with pre-service teacher trainees as a part of feedback sessions during teaching practice. By employing qualitative approach, the research contributes to a deeper understanding of the formation and manifestation of teacher beliefs in teaching.


2018 ◽  
Vol 30 (6) ◽  
pp. 738-746 ◽  
Author(s):  
Xuyun Zhu ◽  
Yun Luo ◽  
Yanlin Huang ◽  
Xuming Wen

Purpose Curves with various profiles have been demonstrated to be more attractive and decorative than the straight lines by William Hogarth. Among all kinds of curves, Hogarth proposed seven serpentine lines as the most beautiful curves, i.e., Hogarth curves. Those seven Hogarth curves are subsequently applied in a wide range of fields, e.g., sculpture, painting, architecture and fashion design, indicating their significance to the development of the formal beauty. Recently, the beauty of Hogarth curves has been suspected to be induced by their special-designed curvature, which could have the potential relationship with the Golden Ratio. The purpose of this paper is to explore the relationship between the Hogarth curves and golden ratio by comparing the curvature of curves with the Fibonacci sequence. Design/methodology/approach Each of the Hogarth curves was fully restored and divided into two parts according to the turning point of the curvature; the ratios of span, curvature and angles between these two parts were compared with the Fibonacci sequence. Findings The experimental results disclosed that the ratio of the fourth Hogarth curve, which was considered as the most beautiful line by Hogarth, was infinitely approaching the golden ratio. Based on the relationship between the fourth Hogarth curve and the golden ratio, the ratios of each curve were employed to define and normalize these curves, providing a quantitative way to redraw the Hogarth curves. Originality/value This research work unlocked the information of the relationship between the Hogarth curves and golden ratio, and proposed an effective and convenient mathematic way to quantify the Hogarth curves. The experimental findings disclosed the underlying mechanisms of the beauty of the forth Hogarth curves. Such a fundamental study will promote the establishment of the normalized methods for evaluating the beauty of arts and provide novel ideas for researchers and industrial technologists to use the Hogarth curves.


1997 ◽  
Vol 273 (5) ◽  
pp. E839-E849 ◽  
Author(s):  
Gerald A. Dienel ◽  
Nancy F. Cruz ◽  
Keiji Adachi ◽  
Louis Sokoloff ◽  
James E. Holden

Methylglucose can be used to assay brain glucose levels because the equilibrium brain-to-plasma distribution ratio for methylglucose ([Formula: see text]/[Formula: see text]) is quantitatively related to brain (Ce) and plasma (Cp) glucose contents. The relationship between Ce and[Formula: see text]/[Formula: see text]predicted by Michaelis-Menten kinetics has been experimentally confirmed when glucose utilization rate (CMRGlc) is maintained at normal, resting levels and Cp is varied in conscious rats. Theoretically, however, Ce and[Formula: see text]/[Formula: see text]should change when CMRGlc is altered and Cp is held constant; their relationship in such conditions was, therefore, examined experimentally. Drugs were applied topically to brains of conscious rats with fixed levels of Cp to produce focal alterations in CMRGlc, and Ce and[Formula: see text]/[Formula: see text]were measured. Plots of Ce as a function of[Formula: see text]/[Formula: see text]for each Cp produced straight lines; their slopes decreased as Cp increased. The results confirm that a single theoretical framework describes the relationship between Ce and[Formula: see text]/[Formula: see text]as either glucose supply or demand is altered over a wide range; they also validate the use of methylglucose to estimate local Ce under abnormal conditions.


Author(s):  
Barbara Foley

This concluding chapter offers a brief consideration of the relationship between history and form in Cane. Given the wide range of interpretations of the text's parts, it comes as no surprise that critics have presented dramatically differing interpretations of the whole. Some have discerned a progression toward resolution and synthesis; others a suspended state of fragmentation and division; while others a triumphant achievement of polyphony and hybridity. With a few noteworthy exceptions, however, commentaries on Cane have largely overlooked the text's engagement with history. They may address Cane's representation of the present as an outgrowth of the past, and its connection with contemporaneous racial discourses and practices, but they do not generally treat the text's form as itself an enactment of the historical contradictions shaping the time and place of its creation.


2021 ◽  
Vol 93 (5) ◽  
Author(s):  
Evgeny L. Nasonov

The 2019 coronavirus disease (COVID-19) pandemic become a major challenge for humanity and a unique opportunity to get an idea of the real achievements of modern biology and medicine. In the course of the pandemic, a large number of new fundamental and medical issues have been revealed regarding the relationship between viral infection and many common chronic non-infectious diseases, among which immune-mediated rheumatic diseases (IMRD) occupy an important position. It is now well known that SARS-CoV-2 infection is accompanied by a wide range of extrapulmonary clinical and laboratory disorders, some of which are characteristic of IMRD and other autoimmune and autoinflammatory diseases in humans. The most severe consequence of alterations in regulation of the immunity in COVID-19 and IMRD is the so-called cytokine storm syndrome, which is defined as COVID-19-associated hyperinflammatory syndrome in COVID-19, and as macrophage activation syndrome in IMRD. The COVID-19-associated hyperinflammatory syndrome was used as a reason for drug repurposing and off-label use of a wide range of anti-inflammatory drugs, which have been specially developed for the treatment of IMRD over the past 20 years. Common immunopathological mechanisms and approaches to pharmacotherapy in COVID-19 and IMRD determined the unique place of rheumatology among medical specialties contributing to combat the COVID-19 pandemic. The article provides the basic provisions of the International and National Association of Rheumatologists and the Association of Rheumatologists of Russia (ARR) recommendations for management of patients with IMRD during the COVID-19 pandemic.


Author(s):  
A. Strojnik ◽  
J.W. Scholl ◽  
V. Bevc

The electron accelerator, as inserted between the electron source (injector) and the imaging column of the HVEM, is usually a strong lens and should be optimized in order to ensure high brightness over a wide range of accelerating voltages and illuminating conditions. This is especially true in the case of the STEM where the brightness directly determines the highest resolution attainable. In the past, the optical behavior of accelerators was usually determined for a particular configuration. During the development of the accelerator for the Arizona 1 MEV STEM, systematic investigation was made of the major optical properties for a variety of electrode configurations, number of stages N, accelerating voltages, 1 and 10 MEV, and a range of injection voltages ϕ0 = 1, 3, 10, 30, 100, 300 kV).


GeroPsych ◽  
2020 ◽  
Vol 33 (4) ◽  
pp. 246-251
Author(s):  
Gozde Cetinkol ◽  
Gulbahar Bastug ◽  
E. Tugba Ozel Kizil

Abstract. Depression in older adults can be explained by Erikson’s theory on the conflict of ego integrity versus hopelessness. The study investigated the relationship between past acceptance, hopelessness, death anxiety, and depressive symptoms in 100 older (≥50 years) adults. The total Beck Hopelessness (BHS), Geriatric Depression (GDS), and Accepting the Past (ACPAST) subscale scores of the depressed group were higher, while the total Death Anxiety (DAS) and Reminiscing the Past (REM) subscale scores of both groups were similar. A regression analysis revealed that the BHS, DAS, and ACPAST predicted the GDS. Past acceptance seems to be important for ego integrity in older adults.


2020 ◽  
Vol 04 (04) ◽  
pp. 369-372
Author(s):  
Paul B. Romesser ◽  
Christopher H. Crane

AbstractEvasion of immune recognition is a hallmark of cancer that facilitates tumorigenesis, maintenance, and progression. Systemic immune activation can incite tumor recognition and stimulate potent antitumor responses. While the concept of antitumor immunity is not new, there is renewed interest in tumor immunology given the clinical success of immune modulators in a wide range of cancer subtypes over the past decade. One particularly interesting, yet exceedingly rare phenomenon, is the abscopal response, characterized by a potent systemic antitumor response following localized tumor irradiation presumably attributed to reactivation of antitumor immunity.


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