scholarly journals Observing the impossible – in situ observations of hail trajectories using the HailSonde

2021 ◽  
Author(s):  
Joshua Soderholm

<p>From the early stages of hailstone growth to the ground-impact finale, a trajectory is taken by each hailstone through the parent hailstorm. Larger hailstones form as their trajectory takes them into regions of the storm that are more favorable for growth, while others may miss out entirely. Simulation-based studies have shown that interactions between the hailstone fall speed, aerodynamics, storm winds (which continue to change along the trajectory and with new growth) can take hailstones on a myriad of different trajectories. Despite improvements in radar technology over the last 20 years, operational hail analysis techniques have changed little, and do not consider trajectories, leaving a high degree of uncertainty when estimating ground impact.</p> <p>Case studies have demonstrated that trajectory information provides significant improvements to hail impact mapping and nowcasting services, but the lack of robust<br />observational datasets to leverage new radar technology and verify trajectories prevents the transition of this new science into operations. The follow proposal presents an innovative approach to measuring trajectories within a hailstorm using hailstone-shaped probes called “HailSondes”. Recent advances in low-energy telemetry, battery technology and electronics miniaturization are combined to make this new sensor possible, which, until recently, was the realm of fantasy for meteorologists (e.g., the 1996 Hollywood classic “Twister” imagined a similar sensors for observing tornadoes). The design challenges, simulations, prototype development and deployment of HailSondes are discussed.</p> <p>HailSonde measurements will provide critical validation for the practical application radarderived trajectories for hailstorm analysis and nowcasting, supporting the transition to future hail services and benefiting a wide range of sectors from aviation, risk management, transport and public safety. This transition from science fiction into real science signifies extraordinary potential for further remote micro-sensor applications in the future. </p>

Author(s):  
E.D. Wolf

Most microelectronics devices and circuits operate faster, consume less power, execute more functions and cost less per circuit function when the feature-sizes internal to the devices and circuits are made smaller. This is part of the stimulus for the Very High-Speed Integrated Circuits (VHSIC) program. There is also a need for smaller, more sensitive sensors in a wide range of disciplines that includes electrochemistry, neurophysiology and ultra-high pressure solid state research. There is often fundamental new science (and sometimes new technology) to be revealed (and used) when a basic parameter such as size is extended to new dimensions, as is evident at the two extremes of smallness and largeness, high energy particle physics and cosmology, respectively. However, there is also a very important intermediate domain of size that spans from the diameter of a small cluster of atoms up to near one micrometer which may also have just as profound effects on society as “big” physics.


PMLA ◽  
2011 ◽  
Vol 126 (1) ◽  
pp. 140-150 ◽  
Author(s):  
Janice Radway

The term zine is a recent variant of fanzine, a neologism coined in the 1930s to refer to magazines self-published by Aficionados of science fiction. Until zines emerged as digital forms, they were generally defined as handmade, noncommercial, irregularly issued, small-run, paper publications circulated by individuals participating in alternative, special-interest communities. Zines exploded in popularity during the 1980s when punk music fans adopted the form as part of their do-it-yourself aesthetic and as an outsider way to communicate among themselves about punk's defiant response to the commercialism of mainstream society. In 1990, only a few years after the first punk zines appeared, Mike Gunderloy made a case for the genre's significance in an article published in the Whole Earth Review, one of the few surviving organs of the 1960s alternative press in the United States. He celebrated zines' wide range of interests and the oppositional politics that generated their underground approach to publication.


Author(s):  
O. M. Byndas ◽  

This article deals with the problem of relationships among people in the future, which are based not on respect and understanding of each other's value, but on absolute dependence on technical progress. The purpose of this work is to highlight the problem of humanity’s tragedy in the genre of science fiction, using the example of Ray Bradbury’s works „Tomorrow's Child” and „The Veldt”. Firstly, it is noted that the difference and, accordingly, the problem begins immediately with terminology, because there is no single stable definition of the term „fantasy” (as a generic phenomenon) in English-language science. The options offered by scientists are speculative fiction, fantastic fiction, fantasy literature. The author notes that science fiction (Sci-Fi) describes many different super important problems of the human society: technological progress, information wars, the desire of people to be immortal, powerful, rich, possessing the Universe. In fact, the tragedy of humanity begins from these desires. However, R. Bradbury’s works „Tomorrow's Child” and „The Veldt” have a wide range of topics, affecting aesthetic, intellectual, moral and scientific problems. In addition, the science fiction writer reveals his special interest in the inner world of the child. In the mentioned-above stories, the idea of the coexistence of people and the techno world is traced, which leads to a tragic situation. Covering the problem of humanity’s tragedy in the future, described back in the distant 1950s, R. Bradbury aims to present another idea of the future, he describes, at the same time, possible threats to us, and shows what significant consequences this can lead to.


Author(s):  
Mike Ashley

This chapter charts to growth of the sf magazine in other English speaking countries, chiefly Canada, Australia and Eire, but also South Africa and Singapore. This brought other national identities into science fiction, with a wide range of approaches from Canada’s remote individuality to Australia’s recognition of its aboriginal influences.


Author(s):  
Qiulin Ma ◽  
Tobias Rossmann ◽  
Zhixiong Guo

An optical micro-coupling system of whispering-gallery mode usually consists of a resonator (e.g. a sphere) and a coupler (e.g. a taper). In this report, silica microspheres of 50–500 μm in diameter are fabricated by hydrogen flame fusing of an end of a single mode fiber or fiber taper. Fiber tapers are fabricated by the method of heating and pulling that meets an adiabatic condition. Taper’s waist diameter can routinely be made less than 1 μm and almost zero transmission loss in a taper is achieved which allows an effective and phase-matched coupling for a wide range sizes of microspheres. Both resonators and couplers’ surface microstructure and shapes are examined by scanning electronic microscopy. Three regimes of coupling are achieved, enabling a good flexibility to control Q value and coupling efficiency of a micro-coupling system. Whispering gallery mode shift is used to demonstrate a novel temperature micro-sensor. Its sensitivity determined from actual experimental results agrees well with the theoretical value. A concept of using the photon’s cavity ring down (CRD) in the microsphere to make a novel high-sensitivity trace gas micro-sensor is proposed. The CRD time constant when ammonia is chosen as the analyte gas is predicted using the simulated absorption lines.


2016 ◽  
Vol 49 (2) ◽  
pp. 205-229 ◽  
Author(s):  
JIM ENDERSBY

AbstractBetween 1916 and 1927, botanists in several countries independently resolved three problems that had mystified earlier naturalists – including Charles Darwin: how did the many species of orchid that did not produce nectar persuade insects to pollinate them? Why did some orchid flowers seem to mimic insects? And why should a native British orchid suffer ‘attacks’ from a bee? Half a century after Darwin's death, these three mysteries were shown to be aspects of a phenomenon now known as pseudocopulation, whereby male insects are deceived into attempting to mate with the orchid's flowers, which mimic female insects; the males then carry the flower's pollen with them when they move on to try the next deceptive orchid. Early twentieth-century botanists were able to see what their predecessors had not because orchids (along with other plants) had undergone an imaginative re-creation: Darwin's science was appropriated by popular interpreters of science, including the novelist Grant Allen; then H.G. Wells imagined orchids as killers (inspiring a number of imitators), to produce a genre of orchid stories that reflected significant cultural shifts, not least in the presentation of female sexuality. It was only after these changes that scientists were able to see plants as equipped with agency, actively able to pursue their own, cunning reproductive strategies – and to outwit animals in the process. This paper traces the movement of a set of ideas that were created in a context that was recognizably scientific; they then became popular non-fiction, then popular fiction, and then inspired a new science, which in turn inspired a new generation of fiction writers. Long after clear barriers between elite and popular science had supposedly been established in the early twentieth century, they remained porous because a variety of imaginative writers kept destabilizing them. The fluidity of the boundaries between makers, interpreters and publics of scientific knowledge was a highly productive one; it helped biology become a vital part of public culture in the twentieth century and beyond.


2014 ◽  
Vol 45 (7) ◽  
pp. 910-920 ◽  
Author(s):  
Andrea De Marcellis ◽  
Giuseppe Ferri ◽  
Paolo Mantenuto ◽  
Alessandro Depari ◽  
Alessandra Flammini ◽  
...  

1970 ◽  
Vol 26 (1) ◽  
pp. 27-36
Author(s):  
Min Bahadur Pun

This paper discusses the emergence of popular culture as an interdisciplinary subject of research. The simplest way to define the term 'popular culture's is a culture widely favored by many people. It refers to beliefs, practices and objects widely shared among people. Some of the examples of popular culture are romance novels, science fiction, photography, pop music, journalism, advertising, television, video, computers, Internet, etc. The study of popular culture entered a new phase in the cultural and intellectual history with the establishment of the Center for Contemporary Cultural Studies (CCCS) led by Richard Hoggart and Stuart Hall. Two things happened to the study of popular culture as an interdisciplinary subject: (1) the study of popular culture has included wide range of issues (2) scholars have intellectual freedom in this field, and they show no interest in establishing clear boundaries around it. Popular culture is always defined in contrast to other conceptual categories such as folk culture, mass culture, dominant culture, and working class culture. Thus, popular culture becomes the 'Other' for them, which largely depends on the context of use. Lastly, the paper discusses the role of popular culture in history, anthropology, sociology and literary theories. In theory, the study of popular culture is always around the debate on postmodernism. It assumes that postmodern culture no longer recognizes the distinction between high culture and popular culture.Key Words: Popular culture; Romance novels; Science fiction; Photography; Pop musicTribhuvan University Journal Vol. XXVI, No. 1, 2009 Page: 27-36


Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2438 ◽  
Author(s):  
Daina Damberga ◽  
Viktoriia Fedorenko ◽  
Kārlis Grundšteins ◽  
Şahin Altundal ◽  
Andris Šutka ◽  
...  

Polydopamine (PDA) is a new biocompatible material, which has prospects in biomedical and sensor applications. Due to functional groups, it can host wide range of biomolecules. ZnO nanostructures are well known templates for optical sensors and biosensors. The combination of ZnO and PDA results in a change of optical properties of ZnO–PDA composites as a shift of photoluminescence (PL) peaks and PL quenching. However, to date, the effect of the PDA layer on fundamental properties of ZnO–PDA nanostructures has not been studied. The presented paper reports on optical and surface properties of novel ZnO–PDA nanocomposites. PDA layers were chemically synthesized on ZnO nanostructures from different solution concentrations of 0.3, 0.4, 0.5 and 0.7 mg/mL. Structure, electronic and optical properties were studied by SEM, Raman, FTIR, diffuse reflectance and photoluminescence methods. The Z-potential of the samples was evaluated in neutral pH (pH = 7.2). The response of the samples towards poly-l-lysine adsorption, as a model molecule, was studied by PL spectroscopy to evaluate the correlation between optical and surface properties. The role of the PDA concentration on fundamental properties was discussed.


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