Modelling and mapping mass movements using statistic method and morphometric parameters

2016 ◽  
pp. 671-677
Author(s):  
A Corsi ◽  
O Bitar ◽  
A Siqueira ◽  
R Stabile
Keyword(s):  
Morphometric Parameters ◽  
Mass Movements ◽  
Statistic Method

scholarly journals Morphology of small-scale submarine mass movement events across the northwest United Kingdom

2021 ◽  
Author(s):  
Gareth Carter ◽  
Rhys Cooper ◽  
Joana Gafeira ◽  
John Howe ◽  
David Long
Keyword(s):  
United Kingdom ◽  
Large Scale ◽  
Slope Failure ◽  
Mass Movement ◽  
Morphometric Parameters ◽  
Single Type ◽  
Small Scale ◽  
Mass Movements ◽  
Submarine Landslides ◽  
Coastal Inlets

<p>Given the potentially devastating consequences of shallow submarine landslides on infrastructure and human lives, it is imperative that we understand potential slope stability issues within marine coastal regions. In Scottish waters, our lack of knowledge regarding the nature of the seabed within the fjords and coastal inlets is concerning given that these sea lochs have similar morphological features and settings to global examples (e.g. Norway) where recent slope failures have had such highly devastating results. Global examples from similar physiographic settings also demonstrate the temporal aspect of these events, highlighting that they are caused by active modern processes and therefore represent contemporary geohazards. In addition, previous studies have highlighted that there tends to be a scale bias towards the mapping and reporting of large-scale events, and there is a requirement for studies that focus on small-scale (≤1 km<sup>3</sup>) mass movements which can still have damaging consequences on seafloor and coastal (both nearshore and onshore) infrastructure.</p><p>In this study, a review of multibeam echo sounder (MBES) survey datasets from five locations around the United Kingdom northwest coast has led to the identification of a total of 14 separate submarine mass movement scars and deposits within the fjords (sea lochs) and coastal inlets of mainland Scotland, and the channels between the islands of the Inner Hebrides. In these areas, Quaternary sediment deposition was dominated by glacial and glaciomarine processes. Analysis of the morphometric parameters of each submarine mass movement has revealed that they fall into four distinct groups of subaqueous landslides; Singular Slumps, Singular Translational, Multiple Single-Type, and Complex (translational & rotational) failures. The Singular Slump Group includes discrete, individual subaqueous slumps that exhibit no evidence of modification through the merging of several scars. The Singular Translational Group comprise a single slide that displays characteristics associated with a single translational (planar) failure with no merging of multiple events. The Multiple Single-Type Group incorporates scars and deposits that displayed morphometric features consistent with the amalgamation of several failure events of the same type (e.g. debris flows or slumps). Finally, the Complex (translational & rotational) Group comprises landslides that exhibited complex styles of failures, including both translational and rotational mechanisms controlling the same slide. The submarine mass movements that comprise this dataset are then discussed in relation to global fjordic and glaciomarine nearshore settings, and slope failure trigger mechanisms associated with these environments are described with tentative links to individual submarine landslides from the database, where appropriate. It is acknowledged that additional MBES data are needed not only to expand this database but also to create a more statistically robust study. However, this initial study provides the basis for a much wider investigation of submarine mass movements and correlations between their morphometric parameters.</p>

Promoting Mass Movements- A New Perspective On Japanese Wartime Imperialism In Korea

2015 ◽  
pp. 1-22
Author(s):  
Shinyoung Kim
Keyword(s):  
Extended Family ◽  
Direct Access ◽  
Mass Movements ◽  
Japanese Imperialism ◽  
Local Practices ◽  
The Social ◽  
Japanese Colonial ◽  
New Perspective ◽  
Economic Bloc ◽  
Colonial Government

This article aims to explore the Japanese colonial government’s efforts to promote mass movements in Korea which rose suddenly and showed remarkable growth throughout the 1930s. It focuses on two Governor-Generals and the directors of the Education Bureau who created the Social Indoctrination movements under Governor-General Ugaki Kazushige in the early 1930s and the National Spiritual Mobilization Movement of Governor-General Minami Jirō in the late 1930s. The analysis covers their respective political motivations, ideological orientation, and organizational structure. It demonstrates that Ugaki, under the drive to integrate Korea with an economic bloc centered on Japan, adapted the traditional local practices of the colonized based on the claim of “Particularities of Korea,” whereas the second Sino-Japanese War led Minami to emphasize assimilation, utilizing the ideology of the extended-family to give colonial power more direct access to individuals as well as obscuring the unequal nature of the colonial relationship. It argues that the colonial government-led campaigns constituted a core ruling mechanism of Japanese imperialism in the 1930s.

Clinical and Radiographic Correlation (According to CT) in Patients with Degenerative Lumbar Spinal Stenosis

2017 ◽  
pp. 124-130 ◽  
Author(s):  
S. G. Mlyavykh ◽  
A. Y. Aleynik ◽  
A. E. Bokov ◽  
M. V. Rasteryaeva ◽  
M. A. Kutlaeva
Keyword(s):  
Ct Scan ◽  
Spinal Canal ◽  
Clinical Manifestations ◽  
Intervertebral Discs ◽  
Morphometric Parameters ◽  
Neurogenic Claudication ◽  
Clinical Group ◽  
Lumbar Stenosis ◽  
Degenerative Lumbar Spinal Stenosis ◽  
Lumbar Spinal

Сomputed tomography (CT) is widely used in the diagnosis of  degenerative pathology of the lumbar spine, but the relationship  between clinical manifestations of lumbar stenosis and its anatomical prerequisites has not been sufficiently studied to date.The objective: to determine the significance of the morphometric  parameters of lumbar stenosis according to CT scans and to  establish their relationship with the prevailing symptoms of the disease.Material and methods. Seventy-five consecutive patients with  clinically significant lumbar stenosis who underwent CT scan before  surgery were enrolled in this study. The average values of thirteen  different morphometric parameters were calculated at LIII–SI levels of the intervertebral discs and of the pedicels in the axial and sagittal views. The possibility of classification of clinical observations and the correlation of morphometric parameters with the clinical forms of lumbar stenosis were investigated using discriminant and logistic regression analysis. Results. CT scan with high probability allocates patients with  predominant symptoms of neurogenic claudication or bilateral  radiculopathy. The most significant morphometric predictors of this  clinical group are the depth of the lateral recesses and the cross-sectional area of the spinal canal.Conclusion. CT scan significantly expands the informative value of  magnetic resonance imaging and can be used in planning the  decompressive stage of the surgery intervention in patients with lumbar spinal canal stenosis.

The influence of pregnancy on the change in morphometric parameters of the vision organ

2020 ◽  
pp. 28-29
Author(s):  
K.I. Manaenkov ◽  
◽  
A.A. Morozov ◽  
A.A. Chestnykh ◽  
E.N. Khomyakova ◽  
...  
Keyword(s):  
Morphometric Parameters

Актуальность. Нормально протекающую беременность принято считать особым физиологическим состоянием организма женщины. Интерес к изменению органа зрения у беременных в различные триместры обусловлен как выявлением офтальмологической патологии, а также выбором тактики ведения родов, постановки терапевтического и акушерского диагноза. Цель. Изучить морфометрические показатели плотности макулярного пигмента и толщины хориоидеи при миопии различной степени в первом и третьем триместрах беременности. Материал и методы. В открытое проспективное рандомизированное исследование вошли 38 соматически здоровых беременных (76 глаз). Средний возраст составил 29±4,3 лет (22-39 лет). Миопия слабой (МСлС) наблюдалась у 38% пациенток, средней (МСС) у 42%, высокой (МВС) 20% соответственно. Помимо стандартного офтальмологического обследования применяли фоторегистрацию глазного дна с определением плотности макулярного пигмента (показателей объема и площади) с помощью цифровой фундус-камеры VISUCAM 500 фирмы ZEISS Meditec, Inc. (Германия) и проводили анализ изменений слоёв сетчатки и толщины хориоидеи с помощью SPECTRALIS HRA+OCT (HEIDELBERG ENGINERING GmbH, Germany). Результаты. Выявлено достоверное снижение оптической плотности макулярного пигмента в среднем на 18%±3,5% (p<0,001) при сравнении показателей I и III триместра у беременных при миопии и увеличение толщины хориоидеи при МВС на 8,16%, МСС на 6,53%, МСлС на 8,28% при p<0,05 во всех группах. Эквивалентное изменение в противоположных направлениях толщины хориоидеии и объёма распределения макулярного пигмента подтверждено обратным коэффициентом корреляции -0,89. Выводы. Выявлена достоверная прямая зависимость между снижением площади и объёма распределения макулярного пигмента, увеличением толщины хориоидеи во время беременности и возникновением ретинальной патологии. Полученные данные можно использовать для выявления ранних патологических изменений со стороны органа зрения.

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