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Author(s):  
Asep Yudha Wirajaya

<p><em>Astha Brata is a leading power in the form of eight basic traits that must be ingrained for a leader and potential leader. Astha Brata personifies the power of the elements of the universe, such as sun, moon, stars, sky or sky, wind, ocean (water), earth, and fire. The symbolization of the value of leadership from the universe is converging on the process of self-awareness of a leader or potential leader to be able to appreciate nature in its entirety. The concepts and character of leadership based on local wisdom are still very relevant when applied by leaders or potential leaders at all levels. In fact, amid the rush of imported leadership theories, which are also not one hundred percent in harmony with the life of our nation and state, efforts to explore and re-actualize the concepts and noble values of Astha Brata's leadership are accurate concepts and foundations as well as the main saka guru that must be applied by a leader and potential leader. The concept of Astha Brata must always be applied, especially in dealing with situations and conditions that are "unfriendly" and easily changeable. By understanding the basic concepts of Astha Brata correctly, one will be able to easily tell the difference between a leader and a ruler.</em></p>


2021 ◽  
Vol 15 (12) ◽  
pp. 5659-5674
Author(s):  
Adrien Wehrlé ◽  
Martin P. Lüthi ◽  
Andrea Walter ◽  
Guillaume Jouvet ◽  
Andreas Vieli

Abstract. Glacier calving is a key dynamical process of the Greenland Ice Sheet and a major driver of its increasing mass loss. Calving waves, generated by the sudden detachment of ice from the glacier terminus, can reach tens of meters in height and provide very valuable insights into quantifying calving activity. In this study, we present a new method for the detection of source location, timing, and magnitude of calving waves using a terrestrial radar interferometer. This method was applied to 11 500 1 min interval acquisitions from Eqip Sermia, West Greenland, in July 2018. Over 7 d, more than 2000 calving waves were detected, including waves generated by submarine calving, which are difficult to observe with other methods. Quantitative assessment with a wave power index (WPI) yields a higher wave activity (+49 %) and higher temporally cumulated WPI (+34 %) in deep water than under shallow conditions. Subglacial meltwater plumes, occurring 2.3 times more often in the deep sector, increase WPI and the number of waves by a factor of 1.8 and 1.3, respectively, in the deep and shallow sector. We therefore explain the higher calving activity in the deep sector by a combination of more frequent meltwater plumes and more efficient calving enhancement linked with better connections to warm deep ocean water.


2021 ◽  
Vol 2114 (1) ◽  
pp. 012019
Author(s):  
Adi Al A’assam ◽  
M.W. Ahamd

Abstract When studying the water reality and calculating the increase in the quantities of water per year, we find that there is another way to increase the percentage of water, and that is through optical reproduction. For a detailed explanation of the location of water on Earth, see the map and the data table shown below. Note that the world’s add up to water supply is almost 1.387 million cubic kilometers (332.6 cubic miles) of wate, of which more than 96% is salt water. As for fresh water, more than 96% are trapped by rivers and glaciers, and 30% are on the ground. As for the freshwater resources represented in rivers and lakes, they constitute about 93,100 cubic kilometers (22,300 cubic miles), which is about 1/150 of 1% of the total water. Rivers and lakes still make up most of the water sources that people use daily. The amount of water stored in the oceans for long periods is much more than that which moves through the water cycle. The total water supply worldwide is 1,386,000,000 cubic kilometers (321,000,000 cubic miles), of which 1,338,0, 000 cubic kilometers (332,500,000 cubic miles) are stored in the oceans at a rate of 95%, as the oceans give almost 90% of the water. Dissipated that goes to the water cycle. The photonic cloning resulting by the sun contributes to the consistency of water level. Indeed, the consistency of ocean water depends not only on the natural cycle of evaporation process of those waters to return to the oceans again, but also on the photonic cloning resulting by the sun, as experiment has vividly shown.


Geology ◽  
2021 ◽  
Author(s):  
Anastassia Y. Borisova ◽  
Anne Nédélec ◽  
Nail R. Zagrtdenov ◽  
Michael J. Toplis ◽  
Wendy A. Bohrson ◽  
...  

Hadean zircons, from the Jack Hills (Western Australia) and other localities, are currently the only window into the earliest terrestrial felsic crust, the formation of which remains enigmatic. Based upon new experimental results, generation of such early crust has been hypothesized to involve the partial melting of hydrated peridotite interacting with basaltic melt at low pressure (&lt;10 km), but it has yet to be demonstrated that such liquids can indeed crystallize zircons comparable to Jack Hills zircon. We used thermodynamic and geochemical modeling to test this hypothesis. The predicted zircon saturation temperatures of &lt;750 °C, together with the model zircon Th, U, Nb, Hf, Y, and rare earth element (REE) contents at 700 °C, δ18OVSMOW (Vienna standard mean ocean water) signatures, and co-crystallizing mineral assemblage were compared to those of the Jack Hills zircon. This comparison was favorable with respect to crystallization temperature, most trace-element contents, and mineral inclusions in zircon. The discrepancy in δ18OVSMOW signatures may be explained by hotter conditions of Hadean protocrust hydration. Our work supports the idea that felsic magma generation at shallow depths involving a primordial weathered ultramafic protocrust and local basaltic intrusions is indeed a viable mechanism for the formation of felsic crust on early Earth.


2021 ◽  
Vol 9 ◽  
Author(s):  
Denise Tyemi Fukai ◽  
Anna Beatriz Jones Oaquim ◽  
Mauro Cirano

The ocean is one of the main components of the climate system. It distributes and absorbs heat to regulate climate at different time scales. Temperature and salinity (saltiness) control the density of ocean water. Differences in water density are important for ocean circulation—they are responsible for generating some currents of water that move through the ocean. An important part of ocean circulation is called thermohaline circulation. Thermohaline circulation absorbs, stores, and transfers heat around the world. Changes in the temperature or salinity of ocean waters can affect thermohaline circulation, so climate change may also alter this circulation. Changes in water circulation also impact the ocean’s chemistry and the organisms that live in the ocean. First, we will explain how ocean circulation happens, and then we will look at how climate change can affect it.


2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Moritz Lehmann ◽  
Lisa Marie Oehlschlägel ◽  
Fabian P. Häusl ◽  
Andreas Held ◽  
Stephan Gekle

AbstractRaindrops impacting water surfaces such as lakes or oceans produce myriads of tiny droplets which are ejected into the atmosphere at very high speeds. Here we combine computer simulations and experimental measurements to investigate whether these droplets can serve as transport vehicles for the transition of microplastic particles with diameters of a few tens of μm from ocean water to the atmosphere. Using the Volume-of-Fluid lattice Boltzmann method, extended by the immersed-boundary method, we performed more than 1600 raindrop impact simulations and provide a detailed statistical analysis on the ejected droplets. Using typical sizes and velocities of real-world raindrops – parameter ranges that are very challenging for 3D simulations – we simulate straight impacts with various raindrop diameters as well as oblique impacts. We find that a 4mm diameter raindrop impact on average ejects more than 167 droplets. We show that these droplets indeed contain microplastic concentrations similar to the ocean water within a few millimeters below the surface. To further assess the plausibility of our simulation results, we conduct a series of laboratory experiments, where we find that microplastic particles are indeed contained in the spray. Based on our results and known data – assuming an average microplastic particle concentration of 2.9 particles per liter at the ocean surface – we estimate that, during rainfall, about 4800 microplastic particles transition into the atmosphere per square kilometer per hour for a typical rain rate of $10 \frac {\text {mm}}{\mathrm {h}}$ 10 mm h and vertical updraft velocity of $0.5 \frac {\mathrm {m}}{\mathrm {s}}$ 0.5 m s .


2021 ◽  
Vol 925 (1) ◽  
pp. 012011
Author(s):  
J S Hamonangan ◽  
IP Anwar ◽  
M Irfan ◽  
O Moefti ◽  
D L Rolian

Abstract The Indonesia Continental Shelf (LKI) expedition was held during September - October 2020. During the survey, there were ten Conductivity Temperature Depth (CTD) measurement stations that located extending from the west of Mentawai Island to the Indian Ocean. In this study, two-line of subsurface temperature, salinity, and density data were plotted longitudinally. The results show the unique feature between the open ocean and coastal area, the characteristic from open ocean did not affect the characteristic in coastal zone, it is shown from the salinity data. The maximum salinity found in the thermocline layer, between 100-150 m in both of line. The salinity increases from the surface until the thermocline, then slightly decreases to the deep layer. The surface salinity in the coastal area significantly different from the open ocean, it is less than 34 PSU. That is the fact that Wyrtki Jet current did not induce the open ocean water to the coastal water in the subsurface. Otherwise, the temperature and density have a similar pattern with range values around 9-31°C.


2021 ◽  
Vol 2115 (1) ◽  
pp. 012021
Author(s):  
JK Adarsh ◽  
OS Anush ◽  
R Shrivarshan ◽  
S Mithulesh Krishnaan ◽  
JK Akash ◽  
...  

Abstract Increasing water pollution is one of the biggest concerns in today’s world. It leads to a variety of problems including an increase in the level of toxic concentration in the water. This paper aims to introduce a concept of an ocean/water body cleaning robot that attempts to classify the wastes using a camera with a custom machine learning model and segregate accordingly using separators while collecting them on the basket attached, that can be recycled on the base station. The robot can be deployed on any water surface thus making it more effective than a largescale ocean pollution cleaning technique. It can be used to clean up oil spills from shipwreck and pipeline leakage and can monitor the water quality of the particular location and send a distress signal to the base station if the readings are abnormal. The water quality data and the information about the type of pollutants from the machine learning model can be used to formulate local laws to reduce pollution and create awareness about the type of material that ends up at the ocean/water body.


Author(s):  
Ying Lin ◽  
Nanping Wu ◽  
Kaiwen Ta ◽  
Amaelle Landais ◽  
Xiaotong Peng

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