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KOMPUTASI REDUKSI GAUSS-JORDAN PADA APLIKASI PENGHITUNGAN TEGANGAN DAN ARUS LISTRIK (Gauss-Jordan ReductionComputation for Computing Application in Voltage and Current)

Mustafidah, Hindayati

BIOMATH Vol 9, No 1 (2008)
Publisher : BIOMATH

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Abstract

This research addresses to apply Gauss-Jordan reduction system for solving electrical circuit problems and making computation model from mathematic solution systems. Gauss-Jordan Reduction system is used for counting voltage and current electricity measures consist some branch points, where resistance and voltages measures at the end of each branches is known. This computational is done with C++ language programming. There are four stages in development of this research. Thefirst stage is analyzing electrical circuit problems. The second stage is making equalization system from the problems, and the third is making a flow chart for knowing the program steps. The last stage is making a computer programming with C++ language programming.Keywords : Gauss-Jordan Reduction, Electrical Circuit, Computation.

THE GROWTH RESPONSE CAUSED BY ARBUSCULAR MYCORRHIZAL FUNGI ON CORN WITH MEDIA POLLUTED BY HEAVY METAL Cd, Pb and Zn

Hajoeningtijas, Oetami Dwi, Budi, Gayuh Prasetyo

BIOMATH Vol 9, No 1 (2008)
Publisher : BIOMATH

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Abstract

This study is aimed to know the most optimal arbuscular mycorrhizal fungi mikoriza dosage for corn to control the absorption of Cd, Pb, Zn, and to know the impact of heavy metal Cd, Pb and Zn treatment toward the growth and harvest of corn. This research was a factorial experiment arranged on randomized  block design (RBD)  and each treatment was conducted three times in which each treatment had two factors: the dosage factor of arbuscular mycorrhizal fungi  (D), consisting of D0 = without arbuscular mycorrhizal fungia, D1=100 g/poly bag, D2=200 g/poly bag; the factor of heavy metal (L), consisting of L1=Cd, L2=Pb, L3=Zn. There were some observed variables: the weight of corn ear  per plant (gr), the dry weight of plant root (gr), the dry weight of upper part of the plant (gr), the number of corn ears, the growth response caused arbuscular mycorrhizal fungi (TPAM). Based on the result and analysis, it could be concluded that providing 200 gr mikoriza per plant showed an effective inokulan with TPAM 25,971%. Moreover, the result gained from the criterion of the ability to improve plant growth signed by the indicator of kation absorption of heavy metal showed that the characteristics of arbuscular mycorrhizal fungi used in the experiment were able to support the improvement of adaptation level of plants toward biotic and abiotic condition. As result, it is recommended to conduct field tests on the land polluted by heavy metals for each species of arbuscular mycorrhizal fungi. This is to find out the potentials of each arbuscular mycorrhizal fungi species used as bio-accumulator of heavy metals so that arbuscular mycorrhizal fungi  would be employed to improve the bio-remedial for polluted land. Key word: Arbuscular mycorrhizal fungi, the heavy metal Cd, Pb, Zn, the growth response caused arbuscular mycorrhizal fungi

PEMECAHAN MASALAH KECEMASAN BELAJAR MENGGUNAKAN SISTEM PAKAR

Mustafidah, Hindayati

BIOMATH Vol 8, No 1 (2007)
Publisher : BIOMATH

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Abstract

The research aims to develop an expert system for identifying studyapprehensive problems and advising students to cope with the problems. There are three stages in the development of the expert system. The first stage is acquiring knowledge. The second stage is representing knowledge and building an expert system shell.The knowledge of the expert system is adopted from the books of educational psicology and education experts. The knowledge is represented in the production rule form. The expert system shell is written in the C programming language with backward chainning inference. This system has nine menus : load, sum of rule, consultation, edit, update knowledge, list rule, print rule, help information, and exit. This system can diagnose the causes of study apprehensive problems and advises students to cope with the problems based on a degree ofbelief.For students who get many apprehensive problems in their study, thissystem can help them as an academic advisor. For anyone interested in Expert Systems, this expert system shell can be used as a reference on implementing expert system with conventional programming language especially.Keywords : expert system, study apprehensive, knowledge, shell, rule.

ANALISIS MATEMATIK TERHADAP KOMPLEKSITAS ALGORITMA PENGURUTAN DATA METODE GELEMBUNG (BUBBLESORT) (Mathematic Analysis of The Bubblesort Algorithm Complexity)

Mustafidah, Hindayati, Ariyanto, Dwi

BIOMATH Vol 9, No 2 (2007)
Publisher : BIOMATH

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Abstract

This research addresses to get complexity model depended on mathematic analysis of time and space of bubblesort algorithm depending on its graphical and mathematic computing growth rate. To get the time and steps for sorting the data built a computer program with programming language Turbo C++ ver 3.0. The program run at a computer with specifications as follows AT-386 Cache 256 Kbyte RAM 8 MB, and a printer. Mathematic analysis result of Bubblesort method wth various data states, data amount, and data setting, shows that Bubblesort algorithm has a time complexity according to O(n lg n). Result of perception pursuant to tables of data and speed process of data sorting and also graph of time growth of data sorting process show the consistent process time go up to data amount.Keywords : complexity, algorithm, bubblesort.

VISUALISASI INTEGRAL TENTU METODE KUADRAT GAUSS MENGGUNAKAN BAHASA PEMROGRAMAN MATLAB (Visualization of Kuadrat Gauss Method in Certain Integration Using MATLAB Programming Language)

Mustafidah, Hindayati, Priyanto, Aji, Setyaningsih, Eka

BIOMATH Vol 7, No 2 (2006)
Publisher : BIOMATH

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Abstract

This research aims to visualize certain integration especially Kuadrat Gauss method using MATLAB programming language. This research uses study literature and computer program implementation methods. The stages of making computer program are identify problem, determine solution, coding, testing the program with several cases or debugging, and documentation. Programming language that used in this research is MATLAB version 5.3. The result is software that is a computer program to visualize in graph mode of Kuadrat Gauss method in certain integration and compute its value.Keywords : MATLAB, Kuadrat Gauss Method, visualize.

ANALISIS KOMPLEKSITAS WAKTU DAN RUANG TERHADAP LAJU PERTUMBUHAN ALGORITMA HEAPSORT (Time and Space Complexity Analysis for Heapsort Algorithm Growth Rate)

Irianto, Sony, Mustafidah, Hindayati

BIOMATH Vol 7, No 2 (2006)
Publisher : BIOMATH

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Abstract

This research addresses to get time and space complexity analysis model of heapsort algorithm depending to its graphical and mathematic analysis growth rate. To get the time and steps for sorting the data used computer program with programming language Turbo C++ ver 3.0. The program run at three computers with specifications as follows: Processor Intel Pentium 166 RAM 32M Cache Memory 512Kbyte, AT-386 Cache 256 Kbyte RAM 8 MB, and AT-486 Cache 256Kbyte RAM 16 MB, and a printer. Conclusion that reaches of this research is that heapsort algorithm is one of the algorithm sorting methods that has a high speed level with procces time O(n log n) of the complexity and sorting time speed level to sort data. Analysis results of the various data condition, sum of data, and data setting, this algorithm has a consistance time complexity. The results of the observation based on data table, sorting procces speed, and proccess time growth graphically, this algorithm has an up consistance proccess time of sum data.Keywords: algorithm, heapsort, time proccess, complexity analyze.

KEMAMPUAN AFEKTIF SISWA KELAS II SMP MUHAMMADIYAH SUMBANG KABUPATEN BANYUMAS POKOK BAHASAN LINGKARAN MENGGUNAKAN PEMBELAJARAN CONTEXTUAL TEACHING AND LEARNING (CTL)

Mustafidah, Hindayati, Budiana, Irkham, Setyaningsih, Eka

BIOMATH Vol 9, No 2 (2007)
Publisher : BIOMATH

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Abstract

This research aim to know the student’s affective ability evaluated fromstudent’s enthusiasm and attitude aspect at circle subtopic in 2nd class of SMP Muhammadiyah Sumbang Banyumas Regency using Contextual Teaching and Learning ( CTL). This research’s subject is student student amount 30 people.Technique of data collecting conducted to use the observation and enquette. Data analyse technique used qualitative descriptive analysis technique. Result of data analyse obtained a class percentage for the enthusiasm of equal to 72,99% and attitude of equal to 76,51%, so that ability of student’s affective evaluated from enthusiasm and attitude obtained percentage of equal to 74,83%. According to assessment criterion that ability of student’s affevtive is goodKeywords : affective ability, CTL, enthusiasm, attitude.

Outdoor Education Program in the Context Mangrove Ecosystem (Case study Of The Scout Movement In Primary Schools-Disrict Cilacap-Central Java)

., Tumisem, Poedjiadi, Anna, Munandar, Akhmad, Sumaatmadja, Nursid

BIOMATH Vol 8, No 1 (2007)
Publisher : BIOMATH

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Abstract

Based on the result analysis that is outdoor education program in the context mangrove ecosystem which applied at the Scout Movement activity can be increase knowledge and understanding of student concerning mangrove equal to 45.99%, increase analyse the problems and issues mangrove ecosystem and can increase ability determine and make solution to problems about mangrove ecosystem. Based on this concept, the Scout Movement activity can support study in class base on environment and assist to increase ability thinks student to solving problem in his/her environment. Based on student response analysis to activity, explain that integrated with subject matter in class and local matter can assist to clarify matter study of science in class, liked by student, please, dont boring, draw and challange. Can be concluded that is outdoor education program base on environment relate at learning by experience and critical thinking where is processing study is not drag. Key words: Outdoor education, mangrove ecosystem, program.

ANALISIS DATA PANEL (Panel Data Analysis)

Purwanto, Joko

BIOMATH Vol 9, No 2 (2008)
Publisher : BIOMATH

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Abstract

In this research, we present: estimator from the parameter of panel data and character from the parameter of panel data. This research will be emphasized to determine an estimator using Generalized Least Square (GLS) approach then brought to Ordinary Least Square (OLS) form and minimize OLS using Sum Square Error (SSE) approach. Then, we give an application for Bank Mandiri share data. The result of the analysis, we obtain: the estimator of B estimator which have the BLUEs character

ANALISIS DATA PANEL MODEL DINAMIK (Dynamic Models of Panel Data Analysis)

Purwanto, Joko

BIOMATH Vol 10, No 1 (2009): BIOMATH
Publisher : BIOMATH

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Abstract

In this research, we present: estimator from the parameter of dynamic models of panel data, character from the parameter of dynamic model of panel data. This research will be emphasized to determine an estimator using Generalized Least Square (GLS) approach then brought to Ordinary Least Square (OLS) form and minimize OLS using Sum Square Error (SSE) approach. Then, we give an application for Bank Mandiri share data. The result of the analysis, we obtain: estimator y is consistent estimator. The estimator of 0 estimator which have the BLUEs character.