IMPLEMENTASI METODE MARR-HILDERTH OPERATOR UNTUK MENDETEKSI TEPI CITRA IKONOS

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Yusman Zalukhu ◽  
Hery Sunandar ◽  
Rivalri Kristianto Hondro
Keyword(s):  
City Planning ◽  
Mineral Exploration ◽  
Satellite Image ◽  
Mine Planning ◽  
Security Evaluation ◽  
Work Activities ◽  
Testing Method ◽  
The Earth ◽  
Imaging Results ◽  
The Difference

Ikonos imagery is a satellite image that has high spatial resolution with an accuracy of one meter pixels for panchromatic and four meters to multispektral. Ikonos imagery is often used to map the process, view, measure and memoniotring areas of work/activities on the Earth. Ikonos image of Government also often use it for things like national security evaluation against the occurrence of the disaster, city planning, mineral exploration and mine planning monitoring of agriculture, and others. Image digital imaging results over long distances using satellite is often there are disturbances in the form of light distortion, noise or other distractions that cause the object on the image less obvious or obscure. This discussion on the research being done is knowing the process of detection on image by calculating the difference between two dots are bertetanggan, and is in the process of smoothing and thresholding on image ikonos. The methods used in this research is a method of Marr-Hilderth. In addition, a process that is done on this research is conducting a testing method against Marr-Hilderth, which can be implemented to fix the blurry objects on images ikonos. The results of this research is to generate image ikonos with display clear object with the menerapakan method of the Marr-Hilderth and tested using the matlab application version 7.8 (r2009a).Keywords: Ikonos image, image processing, method of Marr-Hilderth, Matlab 7.8

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

scholarly journals Colonial legacies: Shaping African cities

2020 ◽  
Author(s):  
Neeraj G Baruah ◽  
J Vernon Henderson ◽  
Cong Peng
Keyword(s):  
City Planning ◽  
Colonial Rule ◽  
Colonial Era ◽  
New Developments ◽  
African Cities ◽  
Compact Development ◽  
Colonial Legacies ◽  
The Difference ◽  
Sub Saharan ◽  
Dual Mandate

Abstract Institutions persisting from colonial rule affect the spatial structure and conditions under which 100s of millions of people live in Sub-saharan African cities. In a sample of 318 cities, Francophone cities have more compact development than Anglophone, overall, in older colonial sections, and at clear extensive margins long after the colonial era. Compactness covers intensity of land use, gridiron road structures and leapfrogging of new developments. Why the difference? Under British indirect and dual mandate rule, colonial and native sections developed without coordination. In contrast, integrated city planning and land allocation were featured in French direct rule. These differences in planning traditions persist.1

III. On the figure, dimensions, and mean specific gravity of the Earth, as derived from the ordnance trigonometrical survey of Great Britain and Ireland

1857 ◽  
Vol 8 ◽  
pp. 111-116 ◽  
Keyword(s):  
United Kingdom ◽  
Great Britain ◽  
Specific Gravity ◽  
Royal Society ◽  
The United Kingdom ◽  
The Earth ◽  
The Difference ◽  
The Government

The Trigonometrical Survey of the United Kingdom commenced in the year 1784, under the immediate auspices of the Royal Society; the first base was traced by General Roy on the 16th of April of that year, on Hounslow Heath, in presence of Sir Joseph Banks, then President of the Society, and some of its most distinguished Fellows. The principal object which the Government had then in view, was the connexion of the Observatories of Paris and Greenwich by means of a triangulation, for the purpose of determining the difference of longitude between the two observatories.

Data Fusion of Total Solar Irradiance Composite Time Series Using 40 years of Satellite Measurements: First Results 

2021 ◽  
Author(s):  
Jean-Philippe Montillet ◽  
Wolfgang Finsterle ◽  
Werner Schmutz ◽  
Margit Haberreiter ◽  
Rok Sikonja
Keyword(s):  
Time Series ◽  
Data Fusion ◽  
Solar Irradiance ◽  
Total Solar Irradiance ◽  
Maunder Minimum ◽  
The Sun ◽  
Climate Reconstructions ◽  
The Earth ◽  
First Results ◽  
The Difference

<p><span>Since the late 70’s, successive satellite missions have been monitoring the sun’s activity, recording total solar irradiance observations. These measurements are important to estimate the Earth’s energy imbalance, </span><span>i.e. the difference of energy absorbed and emitted by our planet. Climate modelers need the solar forcing time series in their models in order to study the influence of the Sun on the Earth’s climate. With this amount of TSI data, solar irradiance reconstruction models  can be better validated which can also improve studies looking at past climate reconstructions (e.g., Maunder minimum). V</span><span>arious algorithms have been proposed in the last decade to merge the various TSI measurements over the 40 years of recording period. We have developed a new statistical algorithm based on data fusion.  The stochastic noise processes of the measurements are modeled via a dual kernel including white and coloured noise.  We show our first results and compare it with previous releases (PMOD,ACRIM, ... ). </span></p>

INVESTIGATION OF THE ABSOLUTENESS OF TIME

2021 ◽  
pp. 51-54
Author(s):  
S. Tiguntsev
Keyword(s):  
High Precision ◽  
Gravitational Potential ◽  
High Speed ◽  
Relativistic Effect ◽  
Theoretical Research ◽  
Clock Frequency ◽  
Positioning Systems ◽  
The Earth ◽  
Flow Of Time ◽  
The Difference

In classical physics, time is considered absolute. It is believed that all processes, regardless of their complexity, do not affect the flow of time The theory of relativity determines that the flow of time for bodies depends both on the speed of movement of bodies and on the magnitude of the gravitational potential. It is believed that time in space orbit passes slower due to the high speed of the spacecraft, and faster due to the lower gravitational potential than on the surface of the Earth. Currently, the dependence of time on the magnitude of the gravitational potential and velocity (relativistic effect) is taken into account in global positioning systems. However, studying the relativistic effect, scientists have made a wrong interpretation of the difference between the clock frequency of an orbiting satellite and the clock frequency on the Earth's surface. All further studies to explain the relativistic effect were carried out according to a similar scenario, that is, only the difference in clock frequencies under conditions of different gravitational potentials was investigated. While conducting theoretical research, I found that the frequency of the signal changes along the way from the satellite to the receiver due to the influence of Earth's gravity. It was found that the readings of two high-precision clocks located at different heights will not differ after any period of time, that is, it is shown that the flow of time does not depend on the gravitational potential. It is proposed to conduct full-scale experiments, during which some high-precision clocks are sent aboard the space station, while others remain in the laboratory on the surface of the earth. It is expected that the readings of the satellite clock will be absolutely identical to the readings of the clock in the Earth laboratory.

Torsional oscillation of a homogeneous elastic spheroid

1962 ◽  
Vol 52 (3) ◽  
pp. 469-484 ◽  
Author(s):  
Tatsuo Usami ◽  
Yasuo Satô
Keyword(s):  
Fundamental Mode ◽  
Free Oscillation ◽  
Torsional Oscillation ◽  
Numerical Calculations ◽  
Higher Harmonics ◽  
Oblate Spheroidal ◽  
The Earth ◽  
Spectral Peaks ◽  
The Difference ◽  
Spheroidal Coordinates

abstract There are several causes for the observations of splitting of the spectral peaks determined from the free oscillation of the earth. In this paper, the splitting due to the ellipticity is studied assuming a homogeneous earth described by oblate spheroidal coordinates. Ellipticity causes the iTn mode to split into (n + 1) modes, while the earth's rotation causes it to split into (2n + 1) modes. 1/297.0 is adopted as the ellipticity of the earth. Numerical calculations are carried out for the fundamental mode (n = 2, 3, 4) and for the first higher harmonics (n = 1). The difference between the extreme frequencies for each value of n is 0.7% (n = 2), 0.5% (n = 3), and 0.4% (n = 4).

scholarly journals Automatic Change Detection Based on Edge Information Using Two Different Types of Ortho Image

2019 ◽  
Vol 2 ◽  
pp. 1-6
Author(s):  
Akira Sasagawa ◽  
Shuto Sugai ◽  
Mayumi Noguchi
Keyword(s):  
Change Detection ◽  
Conventional Method ◽  
Satellite Image ◽  
Aerial Photo ◽  
Edge Information ◽  
Different Types ◽  
The Difference ◽  
Detection Quality ◽  
Edge Vector ◽  
Robust Result

<p><strong>Abstract.</strong> A new algorithm of automatic change detection for update of base map is presented. In conventional method, using two different types of ortho image, such as aerial photo and satellite image, makes detection quality worse due to the difference of each contrast, brightness, color balance and so on. To obtain robust result against such difference between two images, we introduce edge-vector technique. We applied this method using two ortho images derived from each aerial photo and satellite image. We have tested our method and confirmed a performance of the change detection by the interpretation test. In this paper, the detailed algorithm and the result of interpretation test are reported.</p>

scholarly journals Critical Land Detection using Remote Sensing Device and Geographic Information (Case Study of Critical Land Basic of Catchments Area, Alang, Wonogiri)

2017 ◽  
Vol 19 (1) ◽  
pp. 1
Author(s):  
Beny Harjadi
Keyword(s):  
Remote Sensing ◽  
Field Survey ◽  
Critical Level ◽  
Satellite Image ◽  
Geographic Information ◽  
Level Data ◽  
The Difference

Work criteria and indicator of Catchments Area need to be determined because the success and the failure of cultivating Catchments Area can be monitored and evaluated through the determined criteria. Criteria Indicators in utilizing land, one of them is determined based on the erosion index and the ability of utilizing land, for analyzing the land critical level. However, the determination of identification and classification of land critical level has not been determined; as a result the measurement of how wide the real critical land is always changed all the year. In this study, it will be tried a formula to determine the land critical/eve/ with various criteria such as: Class KPL (Ability of Utilizing Land) and the difference of the erosion tolerance value with the great of the erosion compared with land critical level analysis using remote sensing devices. The aim of studying land critical level detection using remote sensing tool and Geographic Information System (SIG) are:1. The backwards and the advantages of critical and analysis method2. Remote Sensing Method for critical and classification3. Critical/and surveyed method in the field (SIG) Collecting and analyzing data can be found from the field survey and interpretation of satellite image visually and using computer. The collected data are analyzed as:a. Comparing the efficiency level and affectivity of collecting biophysical data through field survey, sky photo interpretation, and satellite image analysis.b. Comparing the efficiency level and affectivity of land critical level data that are found from the result of KPL with the result of the measurement of the erosion difference and erosion tolerance.

scholarly journals Komparasi model pembelajaran earth science community dan grup investigasi pada scientific approach

2019 ◽  
Vol 6 (2) ◽  
pp. 117-125
Author(s):  
Jailani Husain Saleh ◽  
Muhsinatun Siasah Masruri
Keyword(s):  
Learning Outcomes ◽  
Learning Style ◽  
Earth Science ◽  
Visual Learning ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Cognitive Aspect ◽  
The Earth ◽  
Science Community ◽  
The Difference

Tujuan penelitian ini untuk (1) menguji perbedaan hasil belajar model earth science community dan group investigation (GI); (2) menguji perbedaan hasil belajar model earth science community dan GI pada siswa dengan gaya belajar visual; (3) menguji perbedaan hasil belajar model earth science community dan GI pada siswa dengan gaya belajar auditorial;  dan (4) menguji interaksi pengaruh antara model pembelajaran dan gaya belajar siswa terhadap hasil belajar geografi. Penelitian ini menggunakan metode kuasi eksperimen dengan desain faktorial 2x2. Populasi dalam penelitian ini adalah seluruh siswa SMA Negeri di Kota Kupang yang tersebar pada 12 sekolah. Teknik sampling yang digunakan adalah Simple Random Sampling dan terpilih 2 sekolah sebagai subjek penelitian. Hasil penelitian menunjukkan: (1) tidak terdapat perbedaan hasil belajar model earth science community dan GI pada aspek kognitif  dengan p = 0,374 > 0,05; pada aspek afektif dengan p = 0,645 > 0,05, dan pada aspek psikomotor dengan p = 0,969 > 0,05; (2) terdapat perbedaan hasil belajar model earth science community dan GI pada siswa dengan gaya belajar visual, pada aspek kognitif dengan p = 0,009 < 0,05; pada aspek afektif dengan p = 0,014 < 0,05 dan pada aspek psikomotor dengan p = 0,024 < 0,05;  (3) terdapat perbedaan hasil belajar model earth science community dan GI pada siswa dengan gaya belajar auditorial, pada aspek kognitif dengan p = 0,042 < 0,05; pada aspek afektif dengan p = 0,026 < 0,05 dan pada aspek psikomotor dengan  p = 0,017 < 0,05; (4) terdapat interaksi pengaruh model pembelajaran dan gaya belajar siswa terhadap hasil belajar geografi, pada aspek kognitif dengan p = 0,008 < 0,05, pada aspek afektif  dengan p = 0,004 < 0,05 dan pada aspek psikomotor dengan p = 0,006 < 0,05. AbstractThis study aims to test: (1) the difference in the learning outcomes through the earth science community and group investigation (GI) models, (2) the difference in the learning outcomes through the earth science community and GI models among students with the visual learning style, (3) the difference in the learning outcomes through the earth science community and GI models among students with the auditory learning style, and (4) the interaction of the effects of the learning models and the students’ learning styles on the geography learning outcomes. The study employed the quasi-experimental method with a 2x2 factorial design. The research population comprised all students of state senior high schools (SHSs) in Kupang city in 12 schools. The sampling technique was the simple random sampling technique and 2 schools were selected as the research subjects. The results of the study are as follows. (1) There is no difference in the learning outcomes between the students learning through the earth science community and GI models in the cognitive aspect with p = 0.374 > 0.05, in the affective aspect with p = 0.645 > 0.05, and in the psychomotor aspect with p = 0.969 > 0.05.(2) There is difference in the learning outcome through the earth science community and GI models among the students with the visual learning style in the cognitive aspect with p = 0.009  < 0.05, in the affective aspect with p = 0.014 < 0.05, and in the psychomotor aspect with p = 0.024 < 0.05. (3) There is difference in the learning outcome through the earth science community and GI models among the students with the visual learning style in the cognitive aspect with p = 0.042 < 0.05, in the affective aspect with p = 0.026 < 0.05, and in the psychomotor aspect with p = 0.017 < 0.05.(4) There is  interaction of the effects of the learning models and the students’ learning styles on the geography learning outcomes in the cognitive aspect with p = 0.008 < 0.05, in the affective aspect with p = 0.004  < 0.05, and in the psychomotor aspect with p = 0.006 < 0.05.

Study on Tensile Property and Strain Ageing Behavior of X100 Linepipe

2010 ◽  
Author(s):  
Yang Li ◽  
Weiwei Zhang ◽  
Shaotao Gong ◽  
Lingkang Ji ◽  
Chunyong Huo ◽  
...  
Keyword(s):  
Strain Curve ◽  
Tensile Specimen ◽  
Sampling Location ◽  
Stress Strain Curve ◽  
Long Distance ◽  
Noticeable Effect ◽  
Testing Method ◽  
Tension Tests ◽  
Tension Properties ◽  
The Difference

A series research programs and industrial trials of X100 linepipe have been launched by CNPC so as to build an X100 trial in China for long-distance gas pipeline in the coming years. In present paper, tests have been conducted on 20.6mm×1016mm diameter Grade X100 linepipe. The microstructures, tension properties will be presented. In order to investigate the influence of anti-corrosion coating process on the performance of pipe, strain aging tests in lab have been carried out as well. It is found that testing method, tensile specimen size and sampling location had a noticeable effect on the testing results. The difference is also observed between the flattened strap specimen and round bar. The influence of time, temperature and pre-strain amount of aging tests on the shape of S-S (stress-strain) curve, tension tests results, yield ratio of pipes are presented as well.

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