Mysterious Phenomenon Research Articles

Classifying FRB spectrograms using nonlinear dimensionality reduction techniques

ABSTRACT Fast radio bursts (FRBs) are mysterious astronomical phenomena, and it is still uncertain whether they consist of multiple types. In this study, we use two nonlinear dimensionality reduction algorithms – Uniform Manifold Approximation and Projection (UMAP) and t-distributed stochastic neighbour embedding (t-SNE) – to differentiate repeaters from apparently non-repeaters in FRBs. Based on the first Canadian Hydrogen Intensity Mapping Experiment (CHIME) FRB catalogue, these two methods are applied to standardized parameter data and image data from a sample of 594 sub-bursts and 535 FRBs, respectively. Both methods are able to differentiate repeaters from apparently non-repeaters. The UMAP algorithm using image data produces more accurate results and is a more model-independent method. Our result shows that in general repeater clusters tend to be narrowband, which implies a difference in burst morphology between repeaters and apparently non-repeaters. We also compared our UMAP predictions with the CHIME/FRB discovery of six new repeaters, the performance was generally good except for one outlier. Finally, we highlight the need for a larger and more complete sample of FRBs.

Probing a Bose metal via electrons: inescapable non-Fermi liquid scattering and pseudogap physics

Non-Fermi liquid behavior and pseudogap formation are among the most well-known examples of exotic spectral features observed in several strongly correlated materials such as the hole-doped cuprates, nickelates, iridates, ruthenates, ferropnictides, doped Mott organics, transition metal dichalcogenides, heavy fermions, d- and f-electron metals, etc. We demonstrate that these features are inevitable consequences when fermions couple to an unconventional Bose metal (Hegg et al 2021 Proc. Natl. Acad. Sci. 118) mean field consisting of lower-dimensional coherence. Not only do we find both exotic phenomena, but also a host of other features that have been observed e.g. in the cuprates including nodal anti-nodal dichotomy and pseudogap asymmetry (symmetry) in momentum (real) space. Obtaining these exotic and heretofore mysterious phenomena via a mean field offers a simple, universal, and therefore widely applicable explanation for their ubiquitous empirical appearance.

MENGEKSPLENASI KARYA MULYANA MOGUS

Mulyana Mogus is one of the artists who is known for his fiber art with knitting techniques and also the concept of his work which has a witty character that is obtained in his daily life is quite thick attached to his work. The advantages in creative thinking and the elements contained in Moel's work are the authors try to analyze his work from expertise, material and medium, as well as the expressions contained in his work. This research is intended to understand the meaning of the aspects contained in the work. This research method uses a qualitative method by using the analysis of the elements of art. 
 Mulyana's fiber art works are works that highlight mysterious underwater phenomena, no wonder his works present marine life and marine animals such as coral reefs, octopuses, fish and other creatures. His works are packed with bright colors and attractive shapes. Mulyana is able to present a narrative full of attractions on each strand of yarn that is knitted and also presents various layers of dimensions and Mulyana's expertise in processing harmonious bright colors. Mulyana makes the original texture of knitted yarn resembles the original texture of the object displayed through the single crochet technique. Starting from the density of the yarn, to the type of yarn used is chosen to produce different textures 
 Based on the discussion, the art that produced not only to be enjoyed alone and the artist must also have the expertise to combine the elements of visual art in process of producing an art works. Pay attention to the material in order to be able to master the medium used. Content and content cannot be separated from the embodiment of the work, then the idea of ​​​​the form of the work is realized as expressively as possible in the medium without forgetting the subject meter, in Mulyana's work he manages to master all visual elements from the shape of color to texture to produce works that educate the public who see the content raised.

Electron-Exciton Coupling in 1T-TiSe2 Bilayer

Excitons in solid state are bosons generated by electron-hole pairs as the Coulomb screening is sufficiently reduced. The exciton condensation can result in exotic physics such as super-fluidity and insulating state. In charge density wave (CDW) state, 1T-TiSe2 is one of the candidates that may host the exciton condensation. However, to envision its excitonic effect is still challenging, particularly at the two-dimensional limit, which is applicable to future devices. Here, we realize the epitaxial 1T-TiSe2 bilayer, the two-dimensional limit for its 2 × 2 × 2 CDW order, to explore the exciton-associated effect. By means of high-resolution scanning tunneling spectroscopy and quasiparticle interference, we discover an unexpected state residing below the conduction band and right within the CDW gap region. As corroborated by our theoretical analysis, this mysterious phenomenon is in good agreement with the electron-exciton coupling. Our study provides a material platform to explore exciton-based electronics and opto-electronics.

Historical Shear Experiments of RC Beams in Hungary and their Effect on Change of Shear Design

The shear behavior is one of the most mysterious physical phenomena of an RC (reinforced concrete) beam. Many shear-transfer actions (such as dowel action, cantilever action, aggregate interlock, tension softening, etc.) affect it. Still, there is no scientific agreement on the number and the role of these phenomena.The paper investigates the historical development of these shear-transfer actions and the calculation models made from them through the glass of experimental research in the last one and half centuries in Hungary, in the context of the current international state of the art. This historical approach gives us an understanding of how the researchers and engineers of the past tried to understand the structure, and it leads us to accept that we are also on the way to understanding the shear behavior. However, the perfect model and understanding are far away from now. But are we on the right way?

The song that never ends: The effect of repeated exposure on the development of an earworm.

An "earworm"-the experience of a catchy melody that repeats persistently in the mind-is a ubiquitous yet mysterious cognitive phenomenon. Previous research demonstrates that earworms for vocal music engage working memory resources, manifesting as "inner singing." This study investigated whether this effect is moderated by prior exposure to music. In one experimental session, participants (N = 44) were presented with four novel song choruses. To manipulate exposure, each song was presented between one and four times, counterbalanced across participants. The following day, participants undertook a serial recall task during and following presentation of each song. In addition, they rated the music on familiarity, enjoyment, their desire to sing along, and perceived catchiness, both before and following the experiment. Increased exposure to novel songs on the first day tended to result in greater interference on task performance during and following their presentation on the second day, yet the effect varied depending on the song. Ratings of the desire to sing along and perceived familiarity increased significantly between the sessions for all songs. These findings are important in understanding the relative influence of familiarity and song-level characteristics on the development of an earworm.

Defying Gravity? On the Magic Tricks of Superfluids

Physics is one of the best tools that we have for solving puzzles in our world. These puzzles can range from questions about common phenomena that you see around you—like the wind blowing through a tree’s branches, to questions about very rare and mysterious phenomena that happen only under specific conditions. My journey with physics led me to one very special phenomenon, in which a normal fluid is cooled down and suddenly changes its fundamental properties to become what is called a superfluid. In this article, I will walk you through the fascinating world of superfluids, present some of the interesting things they do, and explain how these materials tie in with the discovery that led me to winning a Nobel Prize in Physics in 2016.

A Comprehensive conceptual and computational dynamics framework for autonomous regeneration of form and function in biological organisms.

In biology, regeneration is a mysterious phenomenon that has inspired self-repairing systems, robots, and biobots. It is a collective computational process whereby cells communicate to achieve an anatomical set point and restore original function in regenerated tissue or the whole organism. Despite decades of research, the mechanisms involved in this process are still poorly understood. Likewise, the current algorithms are insufficient to overcome this knowledge barrier and enable advances in regenerative medicine, synthetic biology, and living machines/biobots. We propose a comprehensive conceptual framework for the engine of regeneration with hypotheses for the mechanisms and algorithms of stem cell-mediated regeneration that enables a system like the planarian flatworm to fully restore anatomical (form) and bioelectric (function) homeostasis from any small- or large-scale damage. The framework extends the available regeneration knowledge with novel hypotheses to propose collective intelligent self-repair machines with multi-level feedback neural control systems driven by somatic and stem cells. We computationally implemented the framework to demonstrate the robust recovery of both form and function (anatomical and bioelectric homeostasis) in an in silico worm that, in a simple way, resembles the planarian. In the absence of complete regeneration knowledge, the framework contributes to understanding and generating hypotheses for stem cell mediated form and function regeneration, which may help advance regenerative medicine and synthetic biology. Further, as our framework is a bio-inspired and bio-computing self-repair machine, it may be useful for building self-repair robots/biobots and artificial self-repair systems.

ظاهرة المخالفة الجنسيّة في العدد: رؤية مستأنفة على ضوء قواعدِ السّاميّات

This study represents a scientific attempt to provide an appealing explanation of the phenomenon of "Chiastic Concord" of numbers, a mysterious phenomenon that preoccupied grammatical thinking in the Semitic family. Therefore, this study came to address an epistemological problem revealed by the essential question: What is the reason for the Chiastic Concord that we find in the names of the basic numbers? The study attempts to provide a scientific explanation of Chiastic Concord by following the rules of Semitic languages ​​in the field of femininity and in the field of numbers specifically. Thus, the significance of the study is determined. The study’s methodology was based on a large pursuing process of the studies produced in addressing the question of Chiastic Concord, then shortening and summarizing these studies, and then discussing the results and the summaries of these studies. The dialogue was divided into two thoughts: grammatical thinking in the Arabic domain and in the other’s. The study came to a central conclusion, which states that the disorder we find in the grammatical rules of numbers in Semitic languages ​​is in fact due to an incomplete development in these languages. We may find varying degrees of development in these languages which explains the few discrepancies in the grammatical rules of numbers in these languages.

A Frame Theory of Energetic Life: A Twisting Energy Solidified on the Holographic Fractal Structure

Life, as the most mysterious and unique phenomenon on the Earth, has confused humans since time began. Why does life exist as it does and how has the diversity of life developed? We, herein, propose a new theory of energetic life, based on existing energy laws, to interpret the evolution and categorization of physical life forms, from microscopic life to macroscopic life. According to this theory, life is a process in which a mass of energy flows and diffuses in the environment. This energy takes DNA as the three-dimensional blueprint, protein as the basic material unit, and fractal network structure as the framework, so as to solidify from energy and form a semi-solid structure. DNA base pairs simultaneously have dual properties as protein pointers and spatial coordinates, and the multi-level self-similar fractal helix structure ultimately guides the formation of different levels of the fractal structure of organisms. This theory organically links the life phenomenon from microscopic to macroscopic levels, from gene, cell and organ to organism, and it provides a new perspective on life, which may inspire biologists to better reveal the mystery of life.

The Why and How of Pulpal Pain

A proper understanding of pulpal pain has been an enigma to the scientific community. While neurons and transmitters are active participants, focus on neuropeptides has not been emphatic. A complex array of interaction of inflammatory substances, with assortment of nerve fibers in the presence of these molecules, has shed some light to this mysterious phenomenon of pulp pain. A literature search was made of the standard textbooks, Google Scholars, Pubmed and Scopus database for review, original research, case control studies using key words like “pulpal pain” and 'chemicals responsible for pain mechanism' . This paper is an attempt at highlighting not only the roles of these proteinaceous materials, so that they could be targeted to eliminate pain, but also the neuro anatomy and neurophysiology of the pulp.

Traversing the Natural, Supernatural, and Paranormal: Yōkai in Postwar Japan

Yōkai is an elusive category in Japanese history, folklore, and popular culture. It consists of mysterious phenomena that can exercise extraordinary agency in their interactions with humans. Attempting to grapple with this amorphous category, Japanese folklore studies has defined yōkai as malevolent supernatural beings. However, a survey of these studies reveals that most instances of yōkai do not fit this definition. This article discusses the supernaturalization of yōkai and their relegation to the “otherworld” as a process that primarily occurred in three stages: developments in kokugaku cosmology during the early nineteenth century, the import of the concept of the supernatural at the turn of the twentieth century, and the yōkai boom of the late 1960s. In particular, this article emphasizes the importance of the yōkai boom that straddled a premodern folk community and a modernized popular society, leading to a conflation of the concepts of the supernatural, the otherworld, and yōkai.

IEEE pre-university science, technology, engineering, and mathematics outreach: Share. Give back. Inspire

Did you know that, according to Wikipedia, Nicola Tesla became interested in demonstrations of electricity conducted by his physics professor? He later wrote that the demonstrations of these “mysterious phenomena” made him want “to know more of this wonderful force.” Exposing students to new technologies and how they work might be what it takes to spark a student’s curiosity about science, technology, engineering, and mathematics (STEM) professions.

Experimental observation on the end-gas autoignition and detonation affected by chemical reactivity in confined space

The deflagration-to-detonation transition remains one of the most interesting and mysterious physical phenomena in the combustion of energetic materials, which contains substantial complicated and nonlinear characteristics. In the present work, the effect of the chemical reactivity of different fuels and diluent gases on the end-gas autoignition and detonation development in a confined space was investigated. Five fuels (hydrogen, methane, iso-octane, n-heptane, and PRF50) and three diluent gases (argon, nitrogen, and carbon dioxide) were used to change the chemical reactivity. The results showed that both the chemical reactivity and shock wave had a significant influence on the end-gas autoignition and detonation development. For mixtures with different diluent gases, it was observed that the transition thresholds (denoted by critical oxygen fraction) increased in the order of argon, nitrogen, and carbon dioxide. Different detonation modes with varying shock compressions were observed under different diluents for n-heptane. Although the flame propagation of different fuels differs at 21% oxygen fraction, end-gas autoignition and detonation development processes can still be observed in all kinds of fuels when the oxygen fraction was elevated to a certain value. The transition thresholds increased in the order of hydrogen, n-heptane, PRF50, iso-octane, and methane. Further analysis revealed that the fuel with a shorter ignition delay usually required a lower flame tip velocity, accomplished with a delayed occurrence of detonation. In addition, the transition threshold was determined by the chemical reactivity and flame speed.

A Preliminary Result: Characteristic and Mechanism of Deep earthquake in Java subduction zone

The occurrence of deep-focus earthquakes is unusual and has become one of mysterious seismic phenomena. The behavior of deep earthquake occurrence is still poorly understood. The geodynamical process of a deep earthquake must have a fundamental difference of physical processes from a shallow or intermediate earthquake. There are two main processes of deep earthquake occurrence, water infiltration into the subduction zone (dehydration embrittlement) and transformational faulting of metastable olivine. In Indonesia, the Java subduction zone is known as the deep earthquake source region. We will present preliminary results from the study of characteristic and geodynamical processes of deep earthquake events. We used catalog data from ISC-EHB and mechanism data from global CMT catalog within study area 3° – 13°S and 104,5° – 115°E. The activity of deep earthquakes in Java subduction showed 3 main characteristics i.e the seismicity decreases exponentially in 60 – 300 km depth, lack of earthquake activity due to hole structure in 330 – 500 km and increasing earthquake activity in 500-600 km depth due to transformational faulting of metastable olivine. Earthquakes’ focal mechanism most varies at shallow depth, subsequently, focal mechanism transition occurred from reverse at 60-300 km to normal at >300 km depth.

1618년 혜성에 대한 근대 초 독일인들의 인식 — 혜성의 상징적 의미에 대한 고찰 —

The comets that suddenly appeared and crossed the night sky were mysterious phenomena as well as natural incidents for the early modern Europeans. Aristotle’s meteorological theory that was closely connected with his dichotomous cosmology and had decisively affected the European perceptions of comets since the ancient era encountered a serious challenge in the sixteenth century. In 1577, the Danish astronomer Tycho Brahe demonstrated through empirical-quantitative observation and calculation that the comets must be not sublunary meteorological phenomena, but superlunary celestial bodies, and therefore posed a serious problem for the paradigm of the invariability of the celestial sphere. A series of comets of 1618 that motivated many Protestant authors in Germany to write pamphlets on the theme were considered omens indicating imminent catastrophes like a devastating war. Although these comets were the first to be observed through a telescope in the history of astronomy, the new images of special celestial bodies acquired through modern observational instrument could not yet replace the old symbolism. One of the most interesting incidents regarding the symbolic implications of the comets of 1618 was the so-called ‘Ulmer comets debate’, which was inspired by the eschatological interpretation of Ulmer mathematician J. Faulhaber. His millenarian opinion was criticized by both intellectuals and ministers of the city who regarded the comets as sign of God’s punishments, which could be reversible through believers’ tears of repentance.

The Influence of the National-Cultural Image of the World on the Construction of Metaphors in the Poetic Discourse

Abstract The poetic language of Federico García Lorca amazes the reader’s imagination with the richness of images with the outward simplicity and clarity of style. Lorca’s poems simultaneously reveal to us both the national and cultural specifics of the Spanish linguistic picture of the world, and the ways of cognition and reflection of reality by the author, his assessment of the phenomena of this reality from the standpoint of the aesthetic ideal. One of the ‘keys’ of the secret of the phenomenal success of Lorca’s poetry is its metaphor city, the semantic aesthetics of which is revealed only in the context of not only the poems themselves, but also in the context of Spanish culture as a whole. The metaphor, we emphasize once again, is one of the most mysterious phenomena of language, the intuitive comprehension of which is inherent only in true poets. In a metaphor, reality escapes, as if hiding from thought, and then a deep and urgent question begins to arise before the researcher about the role of metaphor in cognition. In the work of Federico Garcia Lorca, the ability of metaphor to clearly reveal the features of national culture characterizes the Spanish linguistic consciousness and the Spanish linguistic personality. The humanities are armed with modern scientific research tools at the present stage of development and lay the foundation for studying the role of metaphor in understanding the essence of Federico Garcia Lorca's work, as well as its relationship and interaction with reality, thinking and consciousness.

THE DEATH PHENOMENON IN TOLSTOY’S AND HEIDEGGER’S PHILOSOPHY

In this article the authors define the key features and approaches to the understanding the phenomenon of death from ancient philosophy to existentialism. Using modern approaches and methods of research, the key problems of the death phenomenon are defined in the context of philosophical analysis. The authors state that with the change of generations and cultural epochs the answers to the questions about this mysterious phenomenon change quite rapidly. These answers though are hypothetical and demonstrate the incompleteness. Digging into the historic and philosophical excursus regarding the development of philosophical thought, the authors pay special attention to M. Heidegger's analysis of Leo Tolstoy's novel “The Death of Ivan Ilyich”. Both Tolstoy and Heidegger claim that only at the “moment” or “sense” of death phenomenon, existence is able to expose its true appearance, as before dying the individual no longer turns to the world of things, as he turns to himself. This study sums up not only to the obvious conclusion that any human being is mortal, but also that life has no predetermined meaning and, therefore, must not be wasted.

Periodic Repeating Fast Radio Bursts: Interaction between a Magnetized Neutron Star and Its Planet in an Eccentric Orbit

Abstract Fast radio bursts (FRBs) are mysterious transient phenomena. The study of repeating FRBs may provide useful information about their nature due to their redetectability. The two most famous repeating sources are FRBs 121102 and 180916, with a period of 157 days and 16.35 days, respectively. Previous studies suggest that the periodicity of FRBs is likely associated with neutron star (NS) binary systems. Here we introduce a new model which proposes that periodic repeating FRBs are due to the interaction of a NS with its planet in a highly elliptical orbit. The periastron of the planet is very close to the NS so that it would be partially disrupted by tidal force every time it passes through the periastron. Fragments generated in the process could interact with the compact star through the Alfvén wing mechanism and produce FRBs. The model can naturally explain the repeatability of FRBs, with a period ranging from a few days to several hundred days, but it generally requires that the eccentricity of the planet’s orbit should be large enough. Taking FRBs 121102 and 180916 as examples, it is shown that the main features of the observed repeating behaviors can be satisfactorily accounted for.

In search of the origin of an Antarctic ghost ship: The legend of the Jenny re-evaluated

AbstractWhen Sir John Franklin’s expedition ships, lost since 1845, were found in the Arctic in 2014 and 2016, respectively, they were referred to several times in the media as ghost ships. However, such a comparison is not new. In 1862, an article linking the disappearance of the Franklin expedition to that of a ghost ship in Antarctic waters appeared in a newly founded German geographic journal aimed at a general audience. The story of the ghost shipJennyin the Drake Passage between South America and Antarctica would probably have been long forgotten had it not appeared again in this journal in English translation a century later. Since then, the story has appeared again and again in publications about mysterious phenomena, without succeeding in answering the question of whether such a ship ever existed at all. Instead of continuing to look for evidence of the actual existence of the ship, the following article not only presents the sources of the 1862 journal article but also examines how the story itself might have originated. In addition to a well-known legend about a ghost ship in the Arctic waters of Greenland, which will also be analysed in greater detail, oral tales and tradition about two almost forgotten voyages into Antarctic waters and a well-known one have probably also been incorporated into the tale of the ghost shipJenny. All translations from German are by the author.