scholarly journals Zones of concentrated deformation (flower structures): field observations and modeling data

2018 ◽  
Vol 9 (3) ◽  
pp. 693-670 ◽  
Author(s):  
M. G. Leonov ◽  
Yu. A. Morozov ◽  
Yu. P. Stephanov ◽  
R. A. Bakeev

Our study was focused on narrow linear zones that penetrate to different depths the crust and have complex infrastructure. Rocks in such zones are more intensively tectonically altered in comparison with the background. ‘Flower structures’ and ‘zones of concentrated deformation’ (ZCD) are the terms to describe these zones. The field study results combined with the data of tectonophysical and computational modeling data and supplemented by the literature analysis gave grounds for the following conclusions. In the experiments, as well as in nature, ZCDs show similar and, in some cases, identical morphological and infrastructural features and have similar stages of their evolution. A ZCD is mainly a reflection of the transpression setting. Its formation is accompanied by 3D plastic shear flow of matter and dilatancy of the deformed volume. A ZCD may be associated with the development of the ‘basement – cover’ system. It may also occur due to the intra-cover tectogenesis that does not influence the basement. Locations of ZCDs are spatially regular and predetermine the tectonic divisibility of the crust and lithosphere.

Géotechnique ◽  
1970 ◽  
Vol 20 (3) ◽  
pp. 277-307 ◽  
Author(s):  
G. Mandl ◽  
R. Fernández Luque

2021 ◽  
Vol 7 (2) ◽  
pp. 126-137
Author(s):  
Hari Wiki Utama ◽  
Rahmi Mulyasari ◽  
Yulia Morsa Said

Sumatra Island is an island that is traversed an active ring of fire at Barisan Range which is related to the active Sumatra fault system and geothermal manifestations. It is associated with geothermal manifestations in Cubadak, Talu, Bonjol, and Rimbo Panti, Pasaman Regency, and West Pasaman Regency, West Sumatra Province, as an indication of a geothermal system connected to the Sumatra Fault System from the Sianok Segment and the Talamau Volcano Complex. Sustainable geotourism has become effective for sustainable development of geotourism, the geothermal energy direct utilization. The purpose of this study is to provide sustainable geotourism from geothermal potential in the fault system, taking into account aspects of village geotourism, ecotourism, ecoculture, and education. The methodology used in this study is to collect data on geothermal manifestations from regional geological maps and field observations in geothermal manifestation areas by considering sustainable geotourism. A simple model of sustainable geotourism is made. Study results indicate several locations of potential geothermal manifestations to be used as sustainable geotourism associated with the Sumatra Fault System and the Talamau Volcano Complex.


2009 ◽  
Vol 407-408 ◽  
pp. 412-415
Author(s):  
Dong Liu ◽  
Wu Yi Chen ◽  
Hong Hai Xu ◽  
Xue Ke Luo ◽  
Hui Liang

The formation of shear localized chips in orthogonal machining of Ti-6Al-4V was investigated. The chips in different cutting velocities were collected and the structure of the adiabatic shear localization was examined by optical microscope and SEM after polishing and eroding. The serrated coefficient, serrated frequency and fibred coefficient were proposed in this paper to characterize the degree of serration and plastic shear flow of the chip quantitatively. Experimental results show that the width of the shear band decreased and the fibred coefficient of the shear band increased as cutting speed increased. The serrated and frequency, the serrated coefficient increased with the increase of cutting speed in the experimental range of cutting speeds.


2020 ◽  
Vol 9 (4) ◽  
pp. 439-443
Author(s):  
Almira Nadia Kusuma ◽  
Chrisna Adhi Suryono ◽  
Ita Riniatsih

Klorofil merupakan faktor utama yang mempengaruhi fotosintesis. Cymodocea serrulata membutuhkan intensitas cahaya yang cukup tinggi untuk melaksanakan proses fotosintesis. Perbedaan intensitas cahaya terhadap lamun tersebut diduga akan mempengaruhi pembentukan klorofil, sehingga penelitian ini dilakukan untuk mengetahui pengaruh perbedaan kedalaman perairan terhadap kandungan klorofil C. serrulata. Penelitian ini menggunakan metode spektrofotometri untuk mengetahui absorbansi pigmen klorofil daun lamun C. Serrulata. Analisis statistika digunakan untuk mendeskripsikan pengaruh kecerahan perairan dan stasiun lokasi terhadap kandungan klorofil lamun C.serrulata. Berdasarkan hasil penelitian, kandungan klorofil tertinggi terdapat di kedalaman 1 meter yaitu sebesar 3,061 µg/l, sedangkan kandungan klorofil terendah terdapat di kedalaman 3 meter yaitu sebesar 1,509 µg/l. Kandungan klorofil menurun seiring dengan bertambahnya kedalaman, yang dipengaruhi oleh kecerahan perairan  dan kadar TSS yang dapat menghambat penetrasi cahaya yang menembus perairan. Chlorophyll is the main factor that affects photosynthesis. Cymodocea serrulata requires a high intensity of the light to carry out the process of photosynthesis. In this case, the differences in light intensity will affect the formation of chlorophyll in seagrass leaves. This study aims to determine the effect of different depths on the chlorophyll content of C. serrulata. Therefore, this study used a spectrophotometric method to determine the absorbance of chlorophyll pigment in C. serrulata. Statistical analysis used to describe the water transparency and sampling station on chlorophyll content. Based on the study results, the highest chlorophyll content has found in 1 meter depth of the sea, which is equal to 3,061 µg/l and the lowest chlorophyll content in 3 meter depth of the sea equal to 1,509 µg/l. It can be concluded that the chlorophyll content decreased while the increasing of the depth due to the water transparency and TSS levels, which can inhibit the penetration of light through the water.


2021 ◽  
Vol 328 ◽  
pp. 10015
Author(s):  
Mustamin Rahim ◽  
Irwan Abbas

This study aims to analyze the characteristics of traditional Buginese houses and positive features that are beneficial to response sustainability and pandemics through literature studies and field observations. The study results show that the traditional Buginese houses were built based on local wisdom and environmental consideration from the philosophy of “Sulapa Eppa" (rectangular) with the meaning "Universe". The building typology is a stilt house consisting of three levels of the room, which symbolize the human body anatomy; head (roof/house attic), body (body-house), and foot (under the house). The Buginese traditional architecture is very responsive to nature and sustainability and contains positive features in maintaining the building occupant’s health in the past according to experience and resources at that time. These positive values can inspire sustainable designs in the future.


Author(s):  
L.S. ZAKHAROVA ◽  

Statement of the problem. The article analyzes results of the study aimed at studying perceptions of contemporary adolescents about the norms of behavior in society. To conduct the research, we developed a questionnaire consisting of questions about what one can be proud of, what can be considered unworthy and even unacceptable in the behavior of a teenager. The questionnaire was designed in a way to take into account opinion of adolescents themselves, their friends, peers and adults of importance from the environment of minors. The purpose of the article is to provide grounds for the selected criteria on social and normative assessment of adolescent behavior, to share the study results, to analyze them through the prism of personal characteristics of the respondents. The research methodology includes analysis of theoretical materials and research works of foreign and Russian scientists and analysis of experience obtained by specialists working with adolescents to correct their deviant behavior. Despite available in-depth studies of deviance issues (Yu.A. Kleiberg, A.I. Zakharov, I.S.Kon, B.A. Krutetsky, A.G. Kovalev, K. Leongard, A.E. Lichko, I.F. Myagkov, V.N. Myasishchev, I.L. Nevsky, E.Sh. Natanzon, V.S.Stepanov, D.I. Feldshtein, E.G. Eidimiller, V.V. Yustitsky, etc.), there are unresolved issues in terms of perceptions of contemporary adolescents about socially approved behavioral manifestations and assessment of their own behavior and behavior of other people. Research results. Based on the literature analysis, the main criteria for assessing behavioral manifestations were identified. For this, adolescents used the following terms “criminality”, “personal weakness / strength”, “ethics”, “relationships”, “social success / failure”. The study considers various options of personal attitude of adolescents to each of these characteristics. When filling out questionnaires, adolescents chose a description for each of these terms, based on the concepts associated with them. The study resulted in identifying common answers, frequency of their use by adolescents and content analysis of the answers. Conclusion. Based on the results of the study of contemporary adolescents’ perceptions about behavioral manifestations of a person in society, it was revealed that there are deficiencies in understanding and distinguishing the essence of the selected terms. This is evidenced by difficulties in choosing a description of each term. Quantitative indicators demonstrate that the majority of adolescents are characterized by the “I am an adult” position and a hypertrophied desire for independence. Answering the questions about what a person can be proud of, most adolescents emphasize the importance of the category of “relationship” and “social success”. Assessing the category of “ethics” adolescents give specific examples of “anti-ethical norms” and refer this to unacceptable and unworthy behavior. Also, description of the term “criminality” refers to “inadmissibility of actions” by the majority of adolescents. “Criminality” is also described by them in terms of theft, murder, violence, and banditry. Answers to the same questions by adults who are most important in the life of adolescents are of the utmost interest. About half of the adult respondents demonstrated the lack of mature perceptions about behavioral manifestations of a person and criteria for an adequate assessment of the actions of other people.


2019 ◽  
Vol 487 (5) ◽  
pp. 551-553
Author(s):  
A. V. Savenko

The sorption-desorption balance of barium at the interaction of muddy-sandy terrigenous material with seawater was experimentally determined. The average value of barium desorption in the mixing zone of river and sea waters is 13 μg/g, which leads to additional input of 80 thousand t/year of barium into the ocean, or 8,6% of its entry into the ocean without taking into account the transformation of runoff at the river-sea geochemical barrier. The assessment of the role of desorption processes in the transformation of dissolved barium runoff is in order of magnitude consistent with the data of field observations for most of the mouth areas of the world’s rivers.


2020 ◽  
Vol 8 (11) ◽  
pp. 832
Author(s):  
Junting Guo ◽  
Yafei Nie ◽  
Shuang Li ◽  
Xianqing Lv

Diapycnal diffusivity is an important parameter to characterize oceanic turbulent mixing and vertical transport. However, due to the challenging accessibility of field observations, the observation of diapycnal diffusivity in the South China Sea (SCS) is rare. In this study, a three-dimensional field of diapycnal diffusivity in the SCS with high spatial resolution is performed by interpolating the rare field observations, which aims to provide a reference for the value of diapycnal diffusivity in ocean models. Given the anisotropy of diapycnal diffusivity and its rapid change in the magnitude in the vertical direction, several typical interpolation methods are compared in this study. Results of two cross-validation methods demonstrate that the three-dimensional (3D) thin-plate spline interpolation method yields the most reasonable and accurate results among a total of five typical methods used in this study.


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