scholarly journals Real Time Monitoring of Groundwater Fluorescence: Principle and Applicability in Nepal

2020 ◽  
Vol 15 (1) ◽  
pp. 137-143
Author(s):  
Aakriti Khadka ◽  
Christina Oikonomou ◽  
Shukra Raj Paudel
Keyword(s):  
Fluorescence Intensity ◽  
Seismic Activity ◽  
Plate Boundary ◽  
Earthquake Precursor ◽  
Natural Phenomena ◽  
Eurasian Plate ◽  
Earthquake Forecast ◽  
Fluorescent Intensity ◽  
The People ◽  
Positive Holes

 As Nepal sits on the Indo-Eurasian plate boundary, it is highly susceptible to catastrophic earthquakes which have been posing a grave threat to the people of the country. Even though earthquake is one of the most destructive natural phenomena, its occurrence is still unpredictable. Advance warning of disastrous earthquakes is crucial so that the damage due to it is minimal. Different changes in the properties of groundwater prior to earthquake have been detected which can give important hints. Among them, the increase in fluorescent intensity of groundwater comprises a significant earthquake precursor. The positive holes, formed due to tectonic stresses in rocks with peroxy defects, interact with groundwater modifying the fluorescence intensity of water. In this study, we investigate the effect of seismic activity on the groundwater fluorescence intensity. The necessity of this examination for the country is also demonstrated. Taking into account the large variation in the groundwater quality and types of rock in Nepal, the investigation of fluorescent intensity using fluorometer may unravel different uncertainties and limitations. The simplicity of fluorometer in installation, methodology, maintenance, and its sensitivity up to large catchment area make it suitable for such investigation. Till now, variations of the groundwater fluorescent intensity have not been deeply studied in Nepal. This is of high importance in terms of earthquake forecast considering the high seismic activity in Nepal which lies on a very seismically active zone.

POLA PENERIMAAN MAHASISWA BARU BERBASIS SYARI’AH SEBAGAI RESPEK KONSISTENSI KE-ISLAMAN DAN KEBERAGAMAN DI UNIVERSITAS SUNAN GIRI SURABAYA

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Ikhwanuddin Ikhwanuddin ◽  
Muhammad Farid ◽  
Ahmad Syafi'i
Keyword(s):  
Qualitative Research ◽  
Private Universities ◽  
Islamic Education ◽  
Natural Phenomena ◽  
Human Engineering ◽  
Initial State ◽  
Descriptive Data ◽  
Descriptive Research ◽  
The People ◽  
Research Procedure

Unsuri has a religious characteristic (culture aswaja), like a public campus characterized by “Islam". Characteristics like this, become one of the efforts to as well as a means to request support and cooperation with the community. Admittedly or not, Islamic education institutions or universities in several regions have until now felt that the community often dominated private universities, this was also felt by Unsuri, that most of the people around Unsuri did not immediately choose Unsuri as their chosen campus, based on this phenomenon, the author feels interested in knowing the initial state of the committee's strategy or the new Sunan Giri Surabaya student admission team, to find out the strategies and committee programs of Sunan Giri University Surabaya, this type of research is descriptive qualitative research, namely data collected in the form of words words, images, not numbers, according to Bagda and Taylor, as quoted by Lexy J. Moleong, qualitative research is a research procedure that produces descriptive data in the form of written or oral words from people and observed behavior. Meanwhile descriptive research is a form of research that is shown to describe or describe phenomena that exist both natural phenomena and human engineering.

scholarly journals Time-resolved and temperature tuneable measurements of fluorescent intensity using a smartphone fluorimeter

The Analyst ◽  
2017 ◽  
Vol 142 (11) ◽  
pp. 1953-1961 ◽  
Author(s):  
Md Arafat Hossain ◽  
John Canning ◽  
Zhikang Yu ◽  
Sandra Ast ◽  
Peter J. Rutledge ◽  
...  
Keyword(s):  
Steady State ◽  
Fluorescence Intensity ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Fluorescent Intensity ◽  
Intensity Measurements

A smartphone fluorimeter is demonstrated for steady-state and time-resolved fluorescence intensity measurements at tunable temperatures.

Recent and active deformation in the North Evia domain, a diffuse plate boundary between Eurasia and Aegean plates in the Western termination of the North Anatolian Fault. 

2021 ◽  
Author(s):  
Fabien Caroir ◽  
Frank Chanier ◽  
Virginie Gaullier ◽  
Julien Bailleul ◽  
Agnès Maillard-Lenoir ◽  
...  
Keyword(s):  
Fault Zone ◽  
Plate Boundary ◽  
Fault Zones ◽  
North Anatolian Fault ◽  
Fault System ◽  
Eurasian Plate ◽  
Slip Rates ◽  
The North ◽  
South West ◽  
North Aegean

<p>The Anatolia-Aegean microplate is currently extruding toward the South and the South-West. This extrusion is classically attributed to the southward retreat of the Aegean subduction zone together with the northward displacement of the Arabian plate. The displacement of Aegean-Anatolian block relative to Eurasia is accommodated by dextral motion along the North Anatolian Fault (NAF), with current slip rates of about 20 mm/yr. The NAF is propagating westward within the North Aegean domain where it gets separated into two main branches, one of them bordering the North Aegean Trough (NAT). This particular context is responsible for dextral and normal stress regimes between the Aegean plate and the Eurasian plate. South-West of the NAT, there is no identified major faults in the continuity of the NAF major branch and the plate boundary deformation is apparently distributed within a wide domain. This area is characterised by slip rates of 20 to 25 mm/yr relative to Eurasian plate but also by clockwise rotation of about 10° since ca 4 Myr. It constitutes a major extensional area involving three large rift basins: the Corinth Gulf, the Almiros Basin and the Sperchios-North Evia Gulf. The latter develops in the axis of the western termination of the NAT, and is therefore a key area to understand the present-day dynamics and the evolution of deformation within this diffuse plate boundary area.</p><p>Our study is mainly based on new structural data from field analysis and from very high resolution seismic reflexion profiles (Sparker 50-300 Joules) acquired during the WATER survey in July-August 2017 onboard the R/V “Téthys II”, but also on existing data on recent to active tectonics (i.e. earthquakes distribution, focal mechanisms, GPS data, etc.). The results from our new marine data emphasize the structural organisation and the evolution of the deformation within the North Evia region, SW of the NAT.</p><p>The combination of our structural analysis (offshore and onshore data) with available data on active/recent deformation led us to define several structural domains within the North Evia region, at the western termination of the North Anatolian Fault. The North Evia Gulf shows four main fault zones, among them the Central Basin Fault Zone (CBFZ) which is obliquely cross-cutting the rift basin and represents the continuity of the onshore Kamena Vourla - Arkitsa Fault System (KVAFS). Other major fault zones, such as the Aedipsos Politika Fault System (APFS) and the Melouna Fault Zone (MFZ) played an important role in the rift initiation but evolved recently with a left-lateral strike-slip motion. Moreover, our seismic dataset allowed to identify several faults in the Skopelos Basin including a large NW-dipping fault which affects the bathymetry and shows an important total vertical offset (>300m). Finally, we propose an update of the deformation pattern in the North Evia region including two lineaments with dextral motion that extend southwestward the North Anatolian Fault system into the Oreoi Channel and the Skopelos Basin. Moreover, the North Evia Gulf domain is dominated by active N-S extension and sinistral reactivation of former large normal faults.</p>

scholarly journals Preparation of polymer–rare earth complexes based on Schiff-base-containing salicylic aldehyde groups attached to the polymer and their fluorescence emission properties

e-Polymers ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 15-22 ◽  
Author(s):  
Dingjun Zhang ◽  
Wenjin Zhao ◽  
Zhaoxuan Feng ◽  
Youzhi Wu ◽  
Caixia Huo ◽  
...  
Keyword(s):  
Schiff Base ◽  
Rare Earth ◽  
Fluorescence Intensity ◽  
Butyl Acrylate ◽  
Fluorescence Emission ◽  
Rare Earth Complexes ◽  
Functionalized Polymers ◽  
Molar Ratio ◽  
Side Chains ◽  
Fluorescent Intensity

AbstractIn this study, the salicylaldehyde hydrazone was bonded onto the side chains of poly (styrene-co-butyl acrylate), firstly obtaining a series of novel Schiff base-functionalized polymers. and using the base-containing polymers as macromolecular ligands through further reaction with EuCl3/YbCl3·6H2O, a series of polymer-rare earth complexes based on Eu(III)/Yb(III) ion were successfully prepared. The structures of the schiff base-containing polymers and their corresponding complexes were characterized by means of infrared spectra and UV spectra. The thermal properties of the functionalized polymers and complexes were investigated by TGA, and the fluorescence properties of the complexes were also researched by fluorescence spectrum. The experimental results show that the complexes have fine thermal stability likely because of the bidentate chelate effect of base-containing polymer and the conjugative effect of salicylaldehyde hydrazone group on the side chain of poly (styrene-co-butyl acrylate). More important, the salicylaldehyde hydrazone group on the side chains of poly(styrene-co-butyl acrylate) can efficaciously sensitize the fluorescence emission of the center ion due to effective intramolecular energy transfer. All the Eu(III)/Yb(III) complexes exhibit characteristic photoluminescence peaks in the visible region. The fluorescence excitation spectra of the complexes were obtained by monitoring the emission of Eu3+/Yb3+ ion at 497 nm, and the peak at 433 nm was found to be the optimal excitation peak. The concentration of salicylaldehyde hydrazone group was changed gradually with the variation of the molar ratio between the butyl acrylate and styrene (1:0.5; 1:1; 1:1.5; 1:2; 1:2.5), and the differences in their fluorescent intensity were followed, and the fluorescence intensity was very weak when the molar ratio of the butyl acrylate to styrene is equal to 1:2.5, while the fluorescence intensity reached a maximum value in the molar ratio of 1:1.

Evolution of migrating transform faults in anisotropic oceanic crust: examples from Iceland

2019 ◽  
Vol 56 (12) ◽  
pp. 1297-1308 ◽  
Author(s):  
Jeffrey A. Karson ◽  
Bryndís Brandsdóttir ◽  
Páll Einarsson ◽  
Kristján Sæmundsson ◽  
James A. Farrell ◽  
...  
Keyword(s):  
Plate Boundary ◽  
Fault Zones ◽  
Plate Boundaries ◽  
Transform Fault ◽  
Eurasian Plate ◽  
Transform Faults ◽  
The North ◽  
Rift Propagation ◽  
Oriented Parallel ◽  
Ocean Ridge

Major transform fault zones link extensional segments of the North American – Eurasian plate boundary as it transects the Iceland Hotspot. Changes in plate boundary geometry, involving ridge jumps, rift propagation, and related transform fault zone migration, have occurred as the boundary has moved relative to the hotspot. Reconfiguration of transform fault zones occurred at about 6 Ma in northern Iceland and began about 3 Ma in southern Iceland. These systems show a range of different types of transform fault zones, ranging from diffuse, oblique rift zones to narrower, well-defined, transform faults oriented parallel to current plate motions. Crustal deformation structures correlate with the inferred duration and magnitude of strike-slip displacements. Collectively, the different expressions of transform zones may represent different stages of development in an evolutionary sequence that may be relevant for understanding the tectonic history of plate boundaries in Iceland as well as the structure of transform fault zones on more typical parts of the mid-ocean ridge system.

Results from geodetic measurements in the western part of the African–Eurasian plate boundary

1998 ◽  
Vol 294 (3-4) ◽  
pp. 261-269 ◽  
Author(s):  
L Bastos ◽  
J Osório ◽  
A Barbeito ◽  
G Hein
Keyword(s):  
Plate Boundary ◽  
Eurasian Plate ◽  
Geodetic Measurements

scholarly journals RF POSTSOVIET URBANONYMY: MAIN NOMINATION MOTIVES AND CITIZENS’ EXPECTATIONS

2020 ◽  
Vol 22 (3) ◽  
pp. 90-98
Author(s):  
Roman V. Razumov ◽  
Keyword(s):  
Endangered Species ◽  
Regional Identity ◽  
Main Stream ◽  
Great Care ◽  
Natural Phenomena ◽  
Rare And Endangered Species ◽  
The People ◽  
New Models ◽  
Rare And Endangered ◽  
Descriptive Names

The aim of this article is the analysis of RF postsoviet urbanonymy, comparison of the nomination motives with those expectations which exist in the society. The author reveals the idea on the example of the titles, names of 23 towns and cities of different regions of RF. The material is analysed in the article according to onomasiological viewpoint. It is compared with the data of sociological surveys in Yaroslavl and Krasnoyarsk. The main attention is given to the analysis of modern onymic situation and the peculiarities of nomination motives. Toponymic committees are an expert body whose decisions serve as recommendations for local executive and legislature branches. Nowadays the main stream of citizens and organizations appeals is connected with the perpetuation in urban toponymy the memory of the people. The author highlighted three motives in object nomination in postsoviet urbanonymy: memorial nomination (names-memoratives), descriptive nomination (names-characteristics), evsemantic nomination (names-positives). The major nomination motive of the objects is creating memoratives. The main peculiarity of this type of urbanonisms development in the postsoviet period is the translation of regional identity with new models. Among personal memoratives new models of names appeared: urbanonyms named after saints and priests, heroes of prerevolution Russian history, local enterprises’ directors, law enforcement workers perished at work, sportsmen, coaches. The author showed main complexities of descriptive names creating. He thinks that it is important to create evsemantic urbanonyms with great care. When creating them it is necessary to fix the names of natural phenomena and rare and endangered species of plants, birds, animals typical for this or that region where onyms are thought over. In the conclusion of the article the author assumes that in each city or town it is necessary to work out the concept of regional urbanonymy policy and to attract historians, culturologists, philologists and ethnographers. showed main complexities of descriptive names creating. He thinks that it is important to create evsemantic urbanonyms with great care. When creating them it is necessary to fix the names of natural phenomena and rare and endangered species of plants, birds, animals typical for this or that region where onyms are thought over. In the conclusion of the article the author assumes that in each city or town it is necessary to work out the concept of regional urbanonymy policy and to attract historians, culturologists, philologists and ethnographers.

scholarly journals 1881 and 1949 earthquakes at the Chios-Cesme Strait (Aegean Sea) and their relation to tsunamis

2005 ◽  
Vol 5 (5) ◽  
pp. 717-725 ◽  
Author(s):  
Y. Altinok ◽  
B. Alpar ◽  
N. Özer ◽  
C. Gazioglu
Keyword(s):  
Seismic Activity ◽  
Aegean Sea ◽  
Normal Faults ◽  
Natural Phenomena ◽  
Sea Waves ◽  
The South ◽  
Izmir Bay ◽  
Moderate Size ◽  
The North ◽  
Narrow Bays

Abstract. The most earthquake-prone areas in the eastern central Aegean Sea are the Izmir Bay, the Karaburun peninsula and the island of Chios. The level of seismic activity and tsunami potential are influenced by the presence of normal faults around the region. There have been about 20 moderate-size earthquakes from 496 BC to 1949 AD. Among these earthquakes, the ones on the dates 20 March 1389, 13 November 1856, 19/22 January 1866, 3 April 1881 and 23 July 1949 produced tsunamis. The Chios-Cesme earthquake (1881, Mw 6.5) took place in the South of the Cesme strait while the Chios-Karaburun earthquake (1949, Mw 6.7) occurred in the North. The tsunamis caused by the earthquakes affected the coasts of Chios Island and Cesme. These waves are thought to be associated with the earthquakes and co-seismic underwater failures possibly occurred along the coasts of the Chios Island and Karaburun Peninsula or on the complex subaqueous morphology between these lands. Some sea waves or oscillations observed following the aftershocks are believed to be related to other natural phenomena; e.g. the seiches occurred mainly in open-narrow bays as triggered by the earthquakes.

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