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INDONESIA
YOUNGSTER PHYSICS JOURNAL
Published by Universitas Diponegoro
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Physics
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Articles 282 Documents
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Prototype sistem pakar diagnosis penyakit diabetes Catur Edi Widodo
Youngster Physics Journal Vol 6, No 2 (2017): Youngster Physics Journal April 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Every member of the community can experience a variety of diseases. The disease can be known from the symptoms it produces, but to know the exact type of disease, needed a doctor or a health professional. Since the number of doctors or health professionals is very limited and can not overcome the problems of the community at the same time, a system that has the capability of a doctor or health professional is required, which in this system contains the expertise of a physician or health professional on diseases and diseases. In this study was designed expert system using rule base (reason based reasoning) with forward chaining and backward chaining inference method that is intended to assist the community in diagnosing the disease. This disease diagnostic expert system developed has advantages in ease of access and ease of use. With the features that are owned, expert systems for the diagnosis of diseases that built can be used as a tool for disease diagnosis and can be accessed by the public to overcome the problem of limited number of doctors or health experts in helping people diagnose the disease.Keywords: disease, expert system, backward chaining, forward chaining, rule-based reasoning
RANCANG BANGUN SISTEM AKUISISI DATA KELEMBABAN DAN PENGENDALIAN SUHU PADA BOX SARANG NYAMUK MENGGUNAKAN PENGENDALI TIPE PID BERBASIS MIKROKONTROLER ATMEGA8535 UNTUK PENGAMATAN SIKLUS HIDUP NYAMUK Aedes aegypti Ibnu Sulistiyono; Ainie Khuriati RS
Youngster Physics Journal Vol 1, No 1 (2012): Youngster Physics Journal Oktober 2012
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Abstract In this research, the PID controller (Proportional Integral Derivative) temperature control work in mosquito nest box automatically to observate life cycle of insects especially the Aedes aegypti species. This is an effort in research to looking for alternative solutions in the prevention of the disease dengue fever. Temperature and humidity SHT11 censor is used as an indicator to manage the light sandwiches intencity useful as actuators. This PID method is applicated on the microcontroller ATMEGA8535 by LCD as viewer of the results and use the computer to monitore the humadity and controls the temperatures of the insect cage settpoint box by value in the input to the processor unit (PC). The PID parameters are determined by use tunning by Ziegler Nichols reaction curve method to get the best parameter value . From the test result we get the controlling parameter  of the PID control are Kp = 51,09; Ki = 77,41; dan Kd = 8,42. Key words : PID, SHT11, Mikrokontroler Atmega8535, LCD, PC, Ziegler Nichols.
PENENTUAN TINGKAT BUTA WARNA DENGAN METODE SEGMENTASI RUANG WARNA FUZZY DAN RULE-BASED FORWARD CHAINING PADA CITRA ISHIHARA Nur Hamid; Kusworo Adi
Youngster Physics Journal Vol 4, No 2 (2015): Youngster Physics Journal April 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Color blindness is a condition in which a person can not distinguish certain wave light that can be distinguished by the normal eyes. Tests are currently being used (Ishihara Test and the Farnsworth Munsell) are simple. But, both of them have weakness in the form of test media used and requires appropriate room.       In this study, applies image processing to the development of color blindness level determination. Image processing is done by segmenting the pattern first with fuzzy color space segmentation. Having obtained the pattern of Ishihara image is used, then recombined with the initial image, so that the image obtained Ishihara with a segmented pattern. If the patient is able to see the pattern which is purposed, then continued to another image. However, if the patient can not see the pattern, then the pattern will be increased intensity of red, green and blue. By using a rule-based forward chaining, the determination of color blindness level is determined by the rules of the increase in the intensity of red, green and blue.          The research data is algorithm testing data which is created toward patients. Successful testing is done with total validation (normal patients and color deficiency) 97.8% and validation for diagnosted patients testing contained 85.7% of color deficiency. In the proposed algorithm is also used for the determination of the boundary wavelength capable of being viewed by people with color blindness.               Keywords: color blindness level, color segmentation, enhancements of color intensity
RANCANG BANGUN ALAT DETEKSI WARNA UNTUK MEMBANTU PENDERITA BUTA WARNA BERBASIS MIKROKONTROLER AVR ATMEGA16 Saiful Widianto; Kusworo Adi; Hernowo Danusaputro
Youngster Physics Journal Vol 2, No 3 (2013): Youngster Physics Journal Juli 2013
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Primary colour detection system made by using colour censor for aquisition and controlled by microcontroller AVR ATMega16 to grouping into various colour. This system consists of hardware likely IC ISD 2590, LCD M1632, Mini microphone, Mini speaker, and Microcontroler AVR ATMega16. Softwere in microcontroler use language C with softwere C Avr and detection result display displayeds in lcd M1632.Primary colour detection system uses colour censor TCS3200 the tension product result linear and calibrated with ingredient colour frequency. primary colour detection system uses colour censor TCS3200 the tension product result linear and calibrated with ingredient colour frequency. Ingredient colour detection that measuresed based on value RGB use push button as electric switch on-off to light led white as white iight source, and colour censor TCS3200 functioned to get light to reflection from ingredient that hitted light. in display lcd be got measurable frequency value magnitude as according to value Red Green Blue (RGB), and sound wave is taked by mini speaker that come from system IC ISD2590 all integrations with mikrokontroler AVR ATMega16.Keyword : Microcontroler AVR ATMega16, IC ISD2590, LCD M1632, Colour Censor TCS3200
WIRELESS SENSOR SYSTEM UNTUK MONITORING KONSENTRASI DEBU MENGGUNAKAN ALGORITMA RULE BASED Agus Sulistiyo; Suryono Suryono
Youngster Physics Journal Vol 5, No 2 (2016): Youngster Physics Journal April 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Air is the source of life required of all living beings. The level of air pollution is increasing as the development of the industrial sector. Monitoring of air pollution levels are needed to determine the air quality at a given location. One indicator of air quality is the concentration of dust, so we need a system of monitoring the concentration of dust in the air that can be monitored in realtime. The method used for system monitoring dust concentrations in this study using telemetry system utilizing a WiFi network. The use of telemetry systems have been more efficient that measurement can be done remotely and measurements can be realtime. Dust concentration measurement using DSM501A dust sensor that produces an output PWM (Pulse Width Modulation). These sensors are connected with the minimum system microcontroller. The microcontroller used is ATmega8535 where the microcontroller has features USART (Universal Synchronous and Asynchronous serial Receiver and Transmitter) as a serial communication mode. RS-232 protocol is used to connect a serial communication data to the computer Remote Terminal Unit (RTU) that located in the location of data collection. The data obtained is sent to a personal computer (PC) Control Terminal Unit (CTU) in monitoring stations with telemetry systems using WiFi networks and saved in database. The conversion result DSM501A dust sensor readings between the low ratio (%) and the value of dust concentration (mg / m3) has a correlation coefficient R = 0.999. Results of the comparison between the data transmitted and received data has error = 0 so it can be concluded no data is lost or gained.Keywords: air quality, dust sensors, telemetry, serial communication.
INTERPRETASI BAWAH PERMUKAAN SISTEM PANAS BUMI DIWAK DAN DEREKAN BERDASARKAN DATA GRAVITASI Syamsul Ilmi; Udi Harmoko; Sugeng Widada
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

ABSTRACTResearch has been carried out using a gravity method that aims to interpret the subsurface structure of the Diwak - Derekan hot springs area based on the Bouguer anomaly data. It also aims to investigate the geothermal system in the area.  The data aquisition was taken using gravitymeter Lacoste & Romberg.Data processing had been done with high correction tool, tidal correction, drift correction,  gravity absolute correction, gravity theoretical correction, free air correction, Bouguer correction, terrain correction to get the complete Bouguer anomaly.  Bouguer anomolay is projected to flat plane and upward continuation is used to separate the regional and residual anomaly. For 2D modelling interpretation by Grav2DC software.The results of study showed the complete Bouguer anomaly contour pair of positive and negative contour indicate a fault zone below the surface. Interpretation is strengthened by the results of the modeling showed a  fault of Diwak - Derekan areas trending southwest- northeast. This fault zone is used as a media outlet fluid to the surface of geothermal systems.Keywords: Gravity Method, 2D modelling, Diwak, Derekan
PEMODELAN BAWAH PERMUKAAN DAERAH PANASBUMI KALIULO BERDASARKAN DATA RESISTIVITAS KONFIGURASI SCHLUMBERGER DENGAN ALGORITMA JARINGAN SYARAF TIRUAN-BACKPROPAGATION Frysca Putti Muviana; Agus Setyawan; Rahmat Gernowo
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

This research used secondary data configuration Schlumberger geoelectric method in the area of geothermal manifestations Kaliulo Mount Ungaran to implement the use of artificial neural network algorithm in geophysical this case to obtain the actual value of the thickness and resistivity. In this artificial neural networks do two processes, namely the training and testing, the training using synthetic data and on testing using field data Then in training the neural network produced the best architectural which is used train resilient propagation (train rp) with three hidden layers with each neuron in the hidden layer consist of 300 neuron, this architecture will be used in testing. The output of the test data is value of the thickness and true resistivity which can be modeled. Result modeling of data processing from ANN is almost the same with IPI2WIN, MSE value obtained is equal to 0.10519 and 0.088304 respectively on the thickness and resistivity actually. The result of 3D model shows the lower part of the earth's subsurface its rock consists as following: topsoil, clay, volcanic breccias, tuff and limestone. 
ANALISA KURVA PERCENTAGE DEPTH DOSE (PDD) DAN PROFILE DOSE UNTUK LAPANGAN RADIASI SIMETRI DAN ASIMETRI PADA LINEAR ACCELERATOR (LINAC) 6 DAN 10 MV Mariatul Khiftiyah; Eko Hidayanto; Zaenal Arifin
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

External radiotheraphy uses either symmetry or asymmetry radiation field. Percentage Depth Dose (PPD) and Dose Profile on either symmetry or asymmetry radiation field is an important parameter in conducting external therapy that is to analyze the result of parameters used for measurement, whether it is adjusted according to the specified tolerance limit. If the field size 10 X 10 cm2 is still in specified tolerance limit or it has been exceeding the limit.The techique used to collect the data was comparing whether dose distribution taken on the surface of either symmetry or asymmetry radiation field with maximum depth gained from Percentage Depth Dose (PPD) measurement and in the depth of 2 cm. By using device Linear Accelerator (LINAC) energy foton 6 and 10 MV in the radiation field with condition field no off-set and off-set 1 cm, off-set 3 cm and off-set 5 cm with Source Surface Distance (SSD) value 100 cm and in radiation field 10 X 10 cm2.The measurement result showed a change depth on Percentage Depth Dose (PPD) value in the off-set of radiation field 5 cm, on both kinds of energy caused by beam hardening, with value of symmetry and flatness 1.43% and 9.28%, for energy 6 MV and 2.2%, 6.59% for energy 10 MV. There was a change in file profile that caused declining value of flatness, and symmetry. Dose distribution because of this asymmetry radiation field should be concerned in clinical for application of asymmetry radiation field usage. Keywords: Percentage Depth Dose (PDD), Profile Dose, Symmetry, Asymmetry, flatness.
Prototype sistem pakar untuk penjadwalan Catur Edi Widodo
Youngster Physics Journal Vol 6, No 1 (2017): Youngster Physics Journal Januari 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Scheduling is a complex problem, which requires huge resource to solve. The resources required include faculty, lecturer, classrooms, and the period of time for teaching. The solution of academic scheduling in large scale still face up so many obstacles to done manually. The college has to give a schedule in certain time when every academic activity is not crash. Scheduling is needed to anticipate crash of students hours to study and lectures time to teach. Scheduling have to fill the boundary and condition so that it convenient when it used. Under these conditions, a system is needed to set the schedule will not crash so as to improve the work of everyone. The possibility to find the best result and the implemented method approach to solve the problem is use constrain satisfaction method. Making this scheduling application is started with build table of combination from class data, room data, lecture data and time slot and followed by initiation and calculation with genetic algorithm. During the process, we generate the time and room data of each lecturer and test if crash or no crash. From the result, indicate fine schedule means there is no crash between each other and all class can be scheduled. Scheduling is optimal if all of space and time that is provided can be filled without happen crash.Keywords: scheduling, generate and test, constraint satisfaction, crash.
EVALUASI MODEL KECEPATAN HASIL METODE TOMOGRAFI REFLEKSI MENGGUNAKAN ATRIBUT KINEMATIK WAVEFIELD PADA DATA SEISMIK LAPANGAN AREA JAWA TIMUR LINE “Σ01” Galih Candra Kusuma; Teguh Suroso; Udi Harmoko
Youngster Physics Journal Vol 1, No 1 (2012): Youngster Physics Journal Oktober 2012
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

A commonly used tool for the construction of such velocity models is reflection tomography by velocity analysis. One of the drawbacks of that method is, however, that it requires picking of reflection events in the seismic prestack data to provide the traveltime information for the tomographic inversion. This picking is extremely time-consuming and can become difficult or even impossible if the signal-to-noise ratio in the data is low. In this study, other tomographic inversion is presented that use of traveltime information in the form of kinematic wavefield attributes. These attributes are the coefficients of second-order traveltime approximation by coherence analysis with the common-reflection-surface (CRS) stack. The research has been carried out with real seismic data of East Java area which has been processed until pre-processing. Process is started with determining kinematic wavefield attributes. Then, the attributes is calculated to get CRS stack. Based on the CRS stack, one can determine information about normal ray travel time, spatial coordinate, first spatial travel time derivatives or slowness, and second spatial travel time derivatives. That information is reconstructed by tomographic inversion modeling to get velocity model of subsurface structure. Initial model is constructed by defining the near surface velocity and velocity gradient as a function of depth. Tomographic inversion tries to minimize the misfit between  observed data and calculated modeling data. The final model is accepted if the misfit is already reached its minimum value. Apart from the tomographic inversion with kinematic wavefield attributes, data is also processed with conventional method to get velocity model by velocity analysis. Both of the velocity models then be compared. The advantages of using tomographic inversion method is to reduce subjectivity in generating velocity model for the process carried out using a mathematical calculation. Picking is further simplified by the fact that, the pick locations do not need to follow continuous of reflector events but are independent of each other and may be placed on locally coherent events. However, if the data input that used in tomographic inversion is bad, such as in this study, then the obtained velocity model  become less precise. Whereas the conventional method, the velocity values can be directed to obtain velocity model according to most likely section. Key words : velocity model, CRS stack, reflection tomography, kinematic wavefield attributes

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