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A different method for interpretation of magnetic anomalies due to 2-D dipping dikes

Kara I., Bal O. T., Tekkeli A. B., Karcioğlu G.

Acta Geophysica

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2017

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Vol. 65, no. 1

237--242

EN

In this study a new method is presented to determine model parameters from magnetic anomalies caused by dipping dikes. The proposed method is applied by employing only the even component of the anomaly. First, the maximum of the even component is divided to its value at any distance x in order to obtain S1. Then, theoretical even component values are computed for the minimal depth (h) and half-width (b) values. S2 is obtained by dividing their maximum to the value computed for the same distance x. A set of S2 values is calculated by slowly increasing the half-width, and h and b for the S2 closest to S1 are determined. The same procedure is repeated by increasing the depth. The determined b values are plotted against the corresponding values of h. After repeating the process and plotting curves for different distances, it is possible to determine the actual depth and half-width values.

2

An Easy Method for Interpretation of Gravity Anomalies Due to Vertical Finite Lines

Kara I., Hoskan N.

Acta Geophysica

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2016

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Vol. 64, no. 6

2232--2243

EN

A new method is introduced to determine the top and bottom depth of a vertical line using gravity anomalies. For this, gravity at a distance x from the origin and horizontal derivative at that point are utilized. A numerical value is obtained dividing the gravity at point x by horizontal derivative. Then a new equation is obtained dividing the theoretical gravity equation by the derivative equation. In that equation, assigning various values to the depth and length of vertical line, several new numerical values are obtained. Among these values, a curve is obtained for the one that is closest to the first value from attending the depth and length values. The intersection point of these curves obtained by repeating this procedure several times for different points x yield the real depth and length values of the line. The method is tested on two synthetics and field examples. Successful results are obtained in both applications.

3

The Effects of Heat - Setting on the Properties of Polyester/Viscose Blended Yarns

Sardag S., Ozdemır O., Kara I.

Fibres & Textiles in Eastern Europe

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2007

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Vol. 15, no. 4 (63)

50--53

EN

30 tex and 20 tex yarn bobbins consisting of 67% PES - 33% viscose were subjected to heat-setting at 90 °C & 110 °C, and under a pressure of 630 mmHg in order to investigate the effects of heat-setting conditions on the properties of twisted yarns. Both heat-set and unset yarns were dyed. The tensile strength properties (tenacity and elongation at break) of each yarns were measured before heat-setting, after heat-setting and after dyeing. The inner, middle and outer sections of the yarn bobbins were measured with a spectrophotometer to find differences in color. As a result, heat-setting and dyeing processes were found to be effective in the tenacity and elasticity of yarns.

PL

Stabilizacji termicznej w 90°C i 110°C, pod ciśnieniem 630 mm Hg poddano nawoje przędzy mieszankowej 67% PES/33% wiskozy o masie liniowej 20 tex i 30 tex. W cwlu zbadania wpływu obróbki cieplnej na właściwości przędzy skręconej. Przędze niepoddane i poddane obróbce cieplnej były barwione a spektrofotometrycznie badano ewentualne różnice w barwie przędzy z warstwy wewnętrznej, środkowej i zewnętrznej. Dla każdej próbki przędzy badano wytrzymałość na zerwanie i wydłużenie przy zerwaniu, przed i po obróbce cieplnej. Stwierdzono pozytywny wpływ stabilizacji termicznej na wytrzymałość i wydłuzenie oraz brak negatywnego wpływu na wybarwienie obrabianych przędz.