scholarly journals The 1815 Tambora eruption: Its significance to the understanding of large-explosion caldera formations

2022 ◽  
Vol 61 (1) ◽  
pp. 5-19
Author(s):  
Izumi Yokoyama
Keyword(s):  
Geophysical Data ◽  
Explosive Eruptions ◽  
The Moon ◽  
Subsurface Structure ◽  
Large Explosion ◽  
The Earth ◽  
The World ◽  
Igneous Activity ◽  
Historical Times ◽  
Definition Of

Volcanic calderas, plentiful on the Earth and the moon, have been of much interest to volcanologists because of their large dimensions and extensive volumes of ejecta. Here, we consider the dynamics of caldera-forming by major explosive eruptions, examining how the breakdown of the earth's surface is caused by violent igneous activity. This leads to the definition of “typical explosion caldera”, which is a prototype of several newly-formed calderas in the historical timescale. There are three examples of such calderas: Tambora (Sumbawa), Krakatau (Sunda Straits), and Novarupta (Alaska). Tam- bora Caldera is the best example of a well-documented, recently formed typical explosion caldera, with no significant subsequent eruptions occurring after its formation. The subsurface structure of Tambora Caldera is discussed and compared to the 1883 eruption of Krakatau, the second largest eruption in historical times. Then, contrasting with the typically basaltic “collapse-type” calderas, a “Tambora-caldera type” is defined as a large “explosion-type” caldera, that may reach up to 10 km in diameter. The Tambora- type caldera concept is useful to qualify and understand the structure and components of other major calderas in the world. Fully developed larger explosion calderas such as Aso and Aira Calderas in Kyushu, Japan are discussed and explained as composite calderas based on geophysical data. Those calderas have repeatedly ejected massive pyroclastic products causing their original structures to grow wider than 10 km.  

scholarly journals Interpreting Locked Photographic Data: The Case of Apollo 17 Photo GPN-2000-00113

Designs ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 8
Author(s):  
Pyrrhon Amathes ◽  
Paul Christodoulides
Keyword(s):  
Experimental Data ◽  
Computer Simulations ◽  
The Moon ◽  
Geometrical Analysis ◽  
Apparent Position ◽  
Apollo Program ◽  
The Earth ◽  
Novel Approach ◽  
The World ◽  
The Moment

Photography can be used for pleasure and art but can also be used in many disciplines of science, because it captures the details of the moment and can serve as a proving tool due to the information it preserves. During the period of the Apollo program (1969 to 1972), the National Aeronautics and Space Administration (NASA) successfully landed humans on the Moon and showed hundreds of photos to the world presenting the travel and landings. This paper uses computer simulations and geometry to examine the authenticity of one such photo, namely Apollo 17 photo GPN-2000-00113. In addition, a novel approach is employed by creating an experimental scene to illustrate details and provide measurements. The crucial factors on which the geometrical analysis relies are locked in the photograph and are: (a) the apparent position of the Earth relative to the illustrated flag and (b) the point to which the shadow of the astronaut taking the photo reaches, in relation to the flagpole. The analysis and experimental data show geometrical and time mismatches, proving that the photo is a composite.

scholarly journals Water on the Moon

2015 ◽  
Vol 11 (A29B) ◽  
pp. 402-406 ◽  
Author(s):  
Yvonne J. Pendleton
Keyword(s):  
Solar Wind ◽  
Thermal Cycling ◽  
Volcanic Glass ◽  
Glass Beads ◽  
The Moon ◽  
Modern Equipment ◽  
Know How ◽  
The Earth ◽  
The World

AbstractAfter years of thinking the Moon is dry, we now know there are three manifestations in which water appears on the Moon today: 1) Previously hypothesized buried deposits of volatiles at the lunar poles were found at Cabeus crater. There are questions about the origin of such volatiles (i.e., in-falling comets & meteorites, migration of recently formed surficial OH/H2O, and accumulated release from the interior), but there is no doubt the water is there. 2) Widespread, thinly-distributed, surficial OH (or H2O) has been clearly detected across all types of lunar terrain. The consensus is that the OH is derived from solar wind, but we do not know how quickly it forms, nor how mobile it is. 3) The amount of water present soon after the Moon formed is now documented in new analyses of lunar materials in volcanic glass beads, apatites and plagioclase feldspars. Apollo era sample analyses were not precise enough to distinguish between indigenous lunar water and terrestrial contamination. Measurements with modern equipment are more precise (both elemental and isotopic), and can better constrain a host of processes (e.g. diffusion, thermal cycling). Scientists around the world are studying lunar water. Ongoing analyses are informing a number of hypotheses and theories about the connection between the Earth and its wet Moon.

Flights of Imagination: Avicenna’s Phoenix (ʿAnqā) and Bedil’s Figuration for the Lyric Self

2020 ◽  
Vol 2 (1) ◽  
pp. 28-72
Author(s):  
Jane Mikkelson
Keyword(s):  
First Person ◽  
The Sun ◽  
The Moon ◽  
The Earth ◽  
Philosophical System ◽  
Personal Experiences ◽  
The World ◽  
The Phoenix

Abstract The phoenix (ʿanqā) appears in the philosophy of Avicenna (d.1037) as his example of a “vain intelligible,” a fictional being that exists in the soul, but not in the world. This remarkable bird is notable (along with the Earth, the moon, the sun, and God) for being a species of one. In this essay, I read the poetry Bedil of Delhi (d.1720) in conversation with the philosophical system of Avicenna, arguing that the phoenix in Bedil’s own philosophical system functions as a key figuration that allows him simultaneously to articulate rigorous impersonal systematic ideas and to document his individual first-personal experiences of those ideas. The phoenix also plays a metaliterary role, allowing Bedil to reflect on this way of doing philosophy in the first person—a method founded on the lyric enrichment of Avicennan rationalism. Paying attention to the adjacencies between poetry and philosophy in Bedil, this essay traces the phoenix’s transformations from a famous philosophical example into one of Bedil’s most striking figurations in his arguments about imagination, mind, and self.

scholarly journals TRANSGENDER: TRANS-ITION TO NOWHERE

2018 ◽  
Vol 4 (2) ◽  
pp. 27-48
Author(s):  
PETER JONES
Keyword(s):  
Female Sexuality ◽  
Human Beings ◽  
Apostle Paul ◽  
The Earth ◽  
The World ◽  
Two Generations ◽  
Genesis 1 ◽  
Definition Of ◽  
In The Beginning

Based on Genesis 1:1, “In the beginning, God created the heavens and the earth” (ESV), the apostle Paul in Romans 1:25 gives an amazingly com- plete definition of the only two ways of existing in the world: “they exchanged the truth about God for a lie and worshiped and served the creature rather than the Creator, who is blessed forever! Amen.” I call these two ways of existing Oneism and Twoism. In Oneism, if you worship creation, you will believe that the world is self-created, self-explanatory, and all made of the same stuff (matter, spirit, or a mixture). Paganism is the worship of nature. If everything shares the same divine substance, then all distinctions are eliminated and everything is god. In Twoism, if you worship God, you will believe that he is the Creator—an external, intelligent, personal God. There are two kinds of existence—the Creator who is uncreated, and everything else, which is created. He has placed distinctions in his creation, making what I call Twoism a worldview based on the binaries of otherness and difference. From living under the cultural canopy of biblical truth, our world has changed in the last one or two generations. This becomes especially evident in the modern views of sexuality—in particular, transsexuality, where human beings now self-define and reject the creational binary of male/female sexuality.

scholarly journals 'POET'S THEATER'

2014 ◽  
Vol 2 (3SE) ◽  
pp. 1-3
Author(s):  
Sandhya Gangarade
Keyword(s):  
The Sun ◽  
The Moon ◽  
The Earth ◽  
Red Color ◽  
The World ◽  
Forest Division

The creator, the Creator, the creator, by whatever name, calls the ultimate power that colors the sky blue, the earth green, the sun gold and the moon silver. The colors of Pushpavali in the forest division are countless and the colors of water creatures in the ocean are amazing. Colorless water is also the miracle of the same and the white, black and red color of Ganga, Yamuna and Saraswati is also an expression of the same. Some also create 'Kavirmanishi Paribhu Swayambhu', the poet of the world of life, nature's colors with full sensibility Does. In poetry, there are mainly three basic colors - white, black, white, black and red. सृष्टा, रचेता, विधाता जिस भी नाम से पुकारें उस परम शक्ति को जो आकाश को नीला, धरती को हरा, सूरज को स्वर्ण और चाँद को रजत रंग में रंग देता है। वन प्रान्तर में पुष्पावलि के रंग अनगिनत है और सागर में जल-जीवों के रंग अद्भुत। रंगहीन जल भी उसी का चमत्कार है और गंगा, यमुना और सरस्वती का श्वेत, श्याम और लाल रंग भी उसी की अभिव्यक्ति है।कवि भी रचेता है ‘कविर्मनीषी परिभू स्वयंभू’ जीवन के जगत के, प्रकृति के रंगो को कवि पूरी संवेदन शीलता से संयोजित करता है। काव्य में मुख्य रूप से तीन रंग आधारभूत रंग है- श्वेत, श्याम, रतनान-सफेद, काला और लाल।

scholarly journals Occultation of Planets by the Moon in European Narrative Medieval Sources

2019 ◽  
Vol 50 (2) ◽  
pp. 192-220
Author(s):  
María José Martínez Usó ◽  
Francisco J. Marco Castillo
Keyword(s):  
Historical Context ◽  
The Moon ◽  
Narrative Texts ◽  
Astronomical Observations ◽  
Calculation Of Parameters ◽  
The Earth ◽  
Medieval Europe ◽  
The World ◽  
Rotation Of The Earth ◽  
Shed Light

Existing research dealing with astronomical observations from medieval Europe have extensively covered topics such as solar and lunar eclipses and sightings of comets and meteors, but no compilation of occultations of planets by the Moon has been carried out and, till now, the data have remained scattered in different publications. The main reasons for this are the small number of observations that has reached us, their limited use for calculation of parameters associated with the rotation of the Earth, and the fact that between the fifth and fifteenth centuries, the period that we consider, almost none of these observations were made scientifically, since they usually appear in narrative texts, be they chronicles or annals. Our purpose is to make a compilation of these phenomena, trying to shed light on some of the most controversial observations after examining them in their historical context. We will examine European sources, but, occasionally, we will also consider reports from other parts of the world to make comparisons, when necessary.

From Russian Icaria to Russian Cosmism

2021 ◽  
Vol 64 ◽  
pp. 361-368
Author(s):  
Fedor I. Girenok
Keyword(s):  
Space Flight ◽  
Human Being ◽  
Human Beings ◽  
The Earth ◽  
The World ◽  
Global Problems ◽  
History Of ◽  
Definition Of ◽  
The Universe

In the article the author analyzes the phenomenon of Russian cosmism and shows its difference from other possible varieties of cosmism. The author understands Russian cosmism as the idea of extending the definition of the universe by the human beings. A human being doesn’t simply have his place in history, on the Earth and in space, but also broadens it by means of his material and spiritual actions. The idea of the world broadening was popular among Russian naturalists in the 19th and the 20th centuries. The most prominent figures among the Russian cosmism followers were N.F. Fedorov and K. E. Tsiolkovsky. The author distinguishes three directions in the history of Russian cosmism – religious, natural-scientific and artistic-poetical. According to the author, only after Gagarin’s space flight the idea of Russian Icaria transferred itself into Russian cosmism. The article studies the sources of Russian cosmism and explains the meaning of anthropocosmism. The author arrives at the conclusion that Russian cosmism offers its own approach to solving modern global problems that differs from the ideas in the reports to the Roman club.

scholarly journals Lunar resources

2015 ◽  
Vol 39 (2) ◽  
pp. 137-167 ◽  
Author(s):  
Ian A. Crawford
Keyword(s):  
World Economy ◽  
Raw Materials ◽  
Economic Resources ◽  
Resource Extraction ◽  
Lunar Exploration ◽  
Economic Interest ◽  
The Moon ◽  
Resource Base ◽  
The Earth ◽  
The World

There is growing interest in the possibility that the resource base of the Solar System might in future be used to supplement the economic resources of our own planet. As the Earth’s closest celestial neighbour, the Moon is sure to feature prominently in these developments. In this paper I review what is currently known about economically exploitable resources on the Moon, while also stressing the need for continued lunar exploration. I find that, although it is difficult to identify any single lunar resource that will be sufficiently valuable to drive a lunar resource extraction industry on its own (notwithstanding claims sometimes made for the 3He isotope, which are found to be exaggerated), the Moon nevertheless does possess abundant raw materials that are of potential economic interest. These are relevant to a hierarchy of future applications, beginning with the use of lunar materials to facilitate human activities on the Moon itself, and progressing to the use of lunar resources to underpin a future industrial capability within the Earth-Moon system. In this way, gradually increasing access to lunar resources may help ‘bootstrap’ a space-based economy from which the world economy, and possibly also the world’s environment, will ultimately benefit.

scholarly journals ROLE OF HEMANT RITU (EARLY WINTER) FOR MAINTEINANCE AND ENHANCEMENT OF BALA (STRENGTH)

2021 ◽  
Vol 9 (4) ◽  
pp. 829-832
Author(s):  
Shilpa Kachhawaha ◽  
Rajesh Kumar Sharma ◽  
Dinesh Chandra Sharma
Keyword(s):  
The Body ◽  
The Sun ◽  
Heating Effect ◽  
Human Beings ◽  
The Moon ◽  
Review Of Literature ◽  
The Earth ◽  
Body Strength ◽  
The World

Seasons (Ritus) are the inherent global earth clock and the rhythm of the world. As per Ayurveda year is divided into six seasons, in which three season Shishira, Vasanta and Greeshma are known as Aadanakala . Other three seasons Varsha, Sharad and Hemanta are said to be Visargakala. In Visarga kala, as the Sun is located in southwards position, its heat reduces or slows down due to the effect of time and its position with respect to the Earth, wind, cloud and rain. The power of the Moon is predominant. Rainwater decreases the heating effect of nature. All of these lead to the predominance of non- dryunctuous, amla (sour), lavana (salty), and madhura (sweet) rasa respectively and step by step rise of body strength in human beings during these three seasons. Out of all the Ritus, Hemanta Ritu is a unique Ritu in terms of having uttam bala. Falling in Dakshinayana, moon is very powerful than sun, Madhur rasa is predominant in this Ritu, so the strength (Bala) of person enhances during this period. This article focuses to disclose thorough review of literature of Hemant ritucharya and its implication towards maintenance and enhancement of Uttam Bala. In Ayurveda oja, veerya, prana, kapha etc terms are considered as synonyms of Bala. Besides prakruti(genetic), sara(physiological) and aahar(diet), kala (season) is one of the prime factors to govern the Bala of the person. Bala stands for the strength of the body in terms of physical, mental, immunological and resistance to the body, the word Bala is being used in different contexts to denote various aspects accordingly. Keywords: Visarga kala, Hemant ritu, Bala

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