Investigation of Geoid Height Variations and Vertical Displacements of the Earth Surface in the Context of the Realization of a Modern Vertical Reference System: A Case Study for Poland

AbstractIn active tectonic zones relative earth surface displacements of mm-order and, relative gravity disturbances of 0.1 mgal size may be expected between two survey epochs. To monitor and separate these small effects significantly special local free networks have to be designed which are measured by relative observations of highest accuracy (mm-and ygal-level). For the connection of the local nets to a global terrestrial reference system a suitable local datum for point coordinates (geometric datum) and gravity field parameters (gravimetric datum) has to be defined within the terrestrial reference system.

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Determining dislocation love number of vertical displacement using GPS observations: case study of 2011 Tohoku-Oki earthquake (Mw 9.0)

Geophysical Journal International ◽

10.1093/gji/ggaa163 ◽

2020 ◽

Vol 222 (2) ◽

pp. 965-977

Author(s):

Junyan Yang ◽

Wenke Sun

Keyword(s):

Green's Functions ◽

Green’S Functions ◽

Vertical Displacement ◽

Fault Slip ◽

Earth Model ◽

Love Number ◽

The Earth ◽

Love Numbers ◽

Vertical Displacements

SUMMARY The concept of determining the dislocation Love numbers using GNSS (Global Navigation Satellite System) data and calculating the corresponding Green's functions is presented in this paper. As a case study, we derive the dislocation Love number h of vertical displacement by combining 1232 onshore GPS data and 7 GPS-Acoustic data with the 2011 Tohoku-Oki earthquake (Mw 9.0). Three fault-slip distributions are used to compare and verify the theory and results. As the GPS stations are only located in Japan Island and along the Japan trench, we use the theoretical vertical displacements of a spherically layered Earth structure to constrain the low-order signal. The L-curve and an a priori preliminary reference skill are applied in the inversion method. Then, the GPS-observed vertical displacement changes are used to invert for the vertical displacement dislocation Love numbers h based on three different fault-slip models. Our results indicate that the estimated dislocation Love numbers $h$ fluctuate significantly from the earth model (i.e. the preliminary reference earth model), especially for the $h_{n1}^{32}$ component, and these changes in $h_{n2}^{12}$ and $h_{n0}^{33} - h_{n0}^{22}$ are relatively small. The vertical displacements derived from the inversion results agree well with the GPS vertical observations. The inverted dislocation Love numbers are considered to profile the regional structure which differs from the mean 1-D heterogeneous structure of the Earth, and the corresponding Green's functions of four independent dislocation sources describe a more reasonable seismic deformation field.

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HISTORICAL URBAN FORM: A CASE STUDY OF MELAKA

PLANNING MALAYSIA JOURNAL ◽

10.21837/pm.v16i6.470 ◽

2018 ◽

Vol 16 ◽

Author(s):

Illyani Ibrahim ◽

Alias Abdullah ◽

Mansor Ibrahim ◽

Fatin Farhana Murtaza

Keyword(s):

Land Use ◽

Content Analysis ◽

Urban Form ◽

Open Space ◽

Earth Surface ◽

Malay Peninsula ◽

Form Analysis ◽

The Earth

Understanding the urban form is crucial in determining the structure of a city in terms of physical and nonphysical aspects. The physical aspects include built-up areas that can be seen on the earth surface, and the nonphysical aspects include the shape, size, density, and configuration of settlements. The objectives of this study are to (i) analyse the elements of historical urban form that are suitable for the site and (ii) to study on the elements of urban form in Melaka. Content analysis was adopted to analyse the literature of urban form and Melaka. Results show that the following four elements of urban form are suitable to be used for historical urban form analysis: (i) streets, (ii) land use, (iii) buildings, and (iv) open space. The findings also indicate that the selected urban form has successfully delineated in the historical of Melaka as the selected urban elements can be specifically scrutinized with the content analysis. Further study will focus on the historical urban form within the Malay Peninsula.

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HISTORICAL URBAN FORM: A CASE STUDY OF MELAKA

PLANNING MALAYSIA JOURNAL ◽

10.21837/pmjournal.v16.i6.470 ◽

2018 ◽

Vol 16 (6) ◽

Author(s):

Illyani Ibrahim ◽

Alias Abdullah ◽

Mansor Ibrahim ◽

Fatin Farhana Murtaza

Keyword(s):

Land Use ◽

Content Analysis ◽

Urban Form ◽

Open Space ◽

Earth Surface ◽

Malay Peninsula ◽

Form Analysis ◽

The Earth

Understanding the urban form is crucial in determining the structure of a city in terms of physical and nonphysical aspects. The physical aspects include built-up areas that can be seen on the earth surface, and the nonphysical aspects include the shape, size, density, and configuration of settlements. The objectives of this study are to (i) analyse the elements of historical urban form that are suitable for the site and (ii) to study on the elements of urban form in Melaka. Content analysis was adopted to analyse the literature of urban form and Melaka. Results show that the following four elements of urban form are suitable to be used for historical urban form analysis: (i) streets, (ii) land use, (iii) buildings, and (iv) open space. The findings also indicate that the selected urban form has successfully delineated in the historical of Melaka as the selected urban elements can be specifically scrutinized with the content analysis. Further study will focus on the historical urban form within the Malay Peninsula.

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The comparison of the divergent and convergent tectonic plates margins seismicity – the case study: Red Sea and Zagros

Contributions to Geophysics and Geodesy ◽

10.31577/congeo.2020.50.2.5 ◽

2020 ◽

Vol 50 (2) ◽

pp. 261-285

Author(s):

Ali AMJADI ◽

Bahram AKASHE ◽

Mohammad ARIAMANESH ◽

Mohsen POURKERMANI

Keyword(s):

Focal Mechanism ◽

Red Sea ◽

Focal Depth ◽

B Value ◽

Earth Surface ◽

Tectonic Plates ◽

Geometrical Characteristics ◽

The Earth ◽

Large Earthquakes

Regarding the seismicity of the Zagros and the Red Sea regions, the present study has investigated and analyzed the seismicity with M ≥ 5 of these regions with obtaining seismicity coefficients, geometrical characteristics including depth, earthquake dispersion and focal mechanism of earthquakes, and their relation to each other. The estimated b-value for these two zones is approximately the same, being equal to ∼1.2. However, the total number of earthquakes in the Zagros is much higher (approximately 5.5 times), when the ratio of small to large earthquakes is about the same amount. In this study, focal depth of more earthquakes occurred and located in the Zagros and Red Sea respectively in depth of 15–20 km and 10–15 km from the earth surface, indicating that the Zagros Crust is thicker than the Red Sea.

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The use of fuzzy sets for resource allocation in an advance request vehicle brokerage system—a case study

Journal of the Operational Research Society ◽

10.1038/sj.jors.2600339 ◽

1997 ◽

Vol 48 (2) ◽

pp. 117-0123

Author(s):

R I John ◽

S C Bennett

Keyword(s):

Resource Allocation ◽

Fuzzy Sets ◽

System A

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Technology and Hospital Information System: A Case of Implementation of Electronic Clinical Records in Hospital Maternity Irene Neto in Lubango, Angola

Journal of Business and Economics ◽

10.15341/jbe(2155-7950)/11.10.2019/012 ◽

2019 ◽

Vol 10 (11) ◽

pp. 1131-1135

Author(s):

Tomas Hambili Paulo Sanjuluca ◽

◽

Ricardo Correia ◽

Anabela Antunes de Almeida ◽

Ana Gloria Diaz Martinez ◽

...

Keyword(s):

Maternity Hospital ◽

Management Support ◽

Retrospective Case ◽

System A ◽

Clinical Records ◽

Retrospective Case Study ◽

The Impact ◽

And Child Health

Introduction: In order to have a good assessment of the quality of maternal and child health care, it is essential that there is up-to-date and reliable information. Objective: To evaluate the impact of the implementation of a computerized database of clinical processes in the admission, archive and medical statistics section, of Maternity hospital Irene Neto/Lubango-Angola. Methodology: A descriptive study with a quantitative and qualitative approach to carry out a retrospective case study deliveries and newborns, records from 2014 to 2017. Final considerations: The implementation of this project may contribute to the improvement of clinical management support management of the hospital as well as facilitating access to information for research and scientific production.

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