1.Seminar UNRI UKM Ke–5 Tahun 2008
https://repository.unri.ac.id/handle/123456789/5609
2023-05-29T09:18:19ZRoot Mean Square Newton’s Method
https://repository.unri.ac.id/handle/123456789/9068
Root Mean Square Newton’s Method
Syamsudhuha, Syamsudhuha; Muhammad, Imran
In this paper we discuss a new modification of Newton’s method based on Root Mean Square rule for solving nonlinear equations. We show that the convergence of the proposed method is of order three. We verify the theoretical results on relevant numerical problems and compare the behavior of the propose method with some mean based Newton’s method
2017-10-14T00:00:00ZDEVELOPMENT OF LOW-COST CAPACITANCE-TYPE SENSOR FOR LIQUID LEVEL MEASUREMENT
https://repository.unri.ac.id/handle/123456789/5823
DEVELOPMENT OF LOW-COST CAPACITANCE-TYPE SENSOR FOR LIQUID LEVEL MEASUREMENT
Umar, Lazuardi
In this paper, an attempt has been made to design a low-cost noncontact capacitancetype
level sensor for a conducting liquid. The sensor is in the form of a uniform
circular stainless steel cylinder of type IC-00179H-2005/I and BS4127-ALSI304, with
diameter of 15-25mm and 700mm length. The inner electrode is made of insulating
material of PTFE-insulated wire with diameter 0.52 - 3.0 mm. The minimum of measured
capacitance is 52.81 pF with sensitivity of 0.283 pF/mm by the maximum water level of
550mm.
2014-03-10T00:00:00ZRECONSTRUCTION OF THE R-T-CURVE OF THE THERMISTOR SENSOR BASED ON PARAMETER EXTRACTION OF THE CURRENT-VOLTAGE CURVE
https://repository.unri.ac.id/handle/123456789/5822
RECONSTRUCTION OF THE R-T-CURVE OF THE THERMISTOR SENSOR BASED ON PARAMETER EXTRACTION OF THE CURRENT-VOLTAGE CURVE
Umar, Lazuardi
A parameter extraction of the current-voltage curve of the thermistor sensor for
reconstruction of its resistance-temperature dependency curve is proposed. The
sensor is supplied with variable voltage of 0-30V and measured in a climatic room
with temperature from -20°C to +80°C to obtain the current-voltage characteristic.
Parameter extraction is used to control parameter changes of important sensor
parameters such as resistances RTo and the temperature coefficient b of the thermistor
itself in accordance to the temperature TM of the medium. The result of the parameter
extraction gives RTo value 143.286 Ω at temperature of 373K, temperature
coefficient b1 0.01 K-1 and b2 9.993 10-3 K-2 respectively and are used to reconstruct
the R-T-curve.
2014-03-10T00:00:00Z