PENERAPAN PENDEKATAN CREATIVE PROBLEM SOLVING UNTUK MENINGKATKAN KEMAMPUAN KONEKSI DAN DISPOSISI MATEMATIS SISWA SMP

Penelitian ini fokus pada peningkatan kemampuan koneksi dan melihat perbedaan disposisi matematis siswa. Metode penelitian yang digunakan adalah kuasi eksperimen dengan desain kelompok kontrol pretes-postes. Pengambilan sampel pada penelitian ini menggunakan teknik purposive sampling sehingga terpilih 39 orang siswa kelompok eksperimen dan 37 orang siswa kelompok kontrol pada kelas VIII SMP Negeri 1 Lembang Kabupaten Bandung Barat. Kelompok ekperimen diberi pembelajaran dengan pendekatan Creative Problem Solving, sedangkan kelompok kontrol diberi pembelajaran biasa. Instrumen penelitian terdiri dari tes kemampuan koneksi matematis dan skala angket disposisi matematis. Analisis data dengan uji t dan Mann Whitney untuk melihat peningkatan kemampuan koneksi serta melihat perbedaan skala disposisi matematis kedua kelompok berdasarkan kategori KAM (tinggi, sedang, dan rendah). Hasil analisis menunjukkan bahwa: a) Peningkatan kemampuan koneksi matematis siswa yang memperoleh pembelajaran dengan pendekatan Creative Problem Solving lebih baik daripada siswa yang memperoleh pembelajaran biasa, baik secara keseluruhan maupun berdasarkan kategori KAM (tinggi, sedang, dan rendah); b) Disposisi matematis siswa yang memperoleh pembelajaran dengan pendekatan Creative Problem Solving lebih baik daripada siswa yang memperoleh pembelajaran biasa hanya pada kategori KAM sedang dan nilai secara keseluruhan, sedangkan untuk kategori KAM (tinggi dan rendah) tidak terdapat perbedaan yang signifikan antara kedua kelompok ;--- This study focuses on enhancement mathematical connection ability and mathematical disposition students. The method used is a quasi-experimental design with pretest-posttest control group. Samples were taken by purposive sampling technique that was selected 39 experimental group students and 37 control group students from class 8th SMP Negeri 1 Lembang, West Bandung. The experimental group was given learning with Creative Problem Solving approach while the control group was given regular learning. The research instruments consisted of the test mathematical connection ability and mathematical disposition questionnaire. Data were analyzed by t test and Mann Whitney to see an enhancemen mathematical connection ability and to see the difference mathematical disposition of the two groups by KAM (high, medium, and low) categories. The analysis showed that: a) Enhancemen of students mathematical connection ability who was taught by Creative Problem Solving approach is better than the students who was taught by the usual learning, both overall and by KAM (high, medium and low) categories; b) Mathematical disposition students who was taught by Creative Problem Solving approach is better than the students who was taught by usual learning only in overall and medium category of KAM, while for KAM (high and low) categories there are no significant difference between the two groups

PEMBUATAN TOOLS ANALISIS SPASIAL KEKRITISAN LAHAN MENGGUNAKAN MODELBUILDER ARCGIS

Jumlah lahan kritis di Indonesia terus mengalami peningkatan, sehingga diperlukan kegiatan rehabilitasi dan perbaikan DAS. Kegiatan rehabilitasi membutuhkan informasi mengenai tingkat kekritisan lahan pada suatu daerah agar memudahkan kegiatan tersebut. Penyusunan peta lahan kritis dilakukan secara per tahap, diantaranya meliputi skoring dan pembobotan, overlay dan reklasifikasi. Proses yang dilakukan secara per tahap membutuhkan waktu tidak sedikit, serta kemungkinan terdapat tahapan yang terlewat dan berulang. Oleh karena itu, tujuan dari penelitian ini adalah membuat tools untuk mengidentifikasi dan memetakan lahan kritis yang dirancang menggunakan ModelBuilder, sehingga bisa digunakan secara mudah, praktis dan berkala pada ArcToolbox. Setelah tools selesai dibangun, maka dilakukan pengujian terhadap kelayakan sistem (Usability) menggunakan metode System Usability Scale (SUS) yang telah divalidasi oleh John Brooke. Kuesioner dari metode SUS yang memiliki 10 pertanyaan dibagikan kepada 30 responden. Skor yang diperoleh dalam pengujian kelayakan sistem adalah 84.75% yang berarti tools yang dihasilkan termasuk ke dalam grade C (Good). Evaluasi sistem juga dilakukan dengan membandingkan hasil dan proses analisis yang dilakukan menggunakan tools dan tanpa tools. Proses analisis dengan menggunakan tools lebih efektif dibandingkan tanpa tools, karena pengguna dapat melakukan analisis secara berkala tanpa harus melakukan tahapan analisis satu per satu.Kata Kunci: Lahan Kritis, ModelBuilder, System Usability Scale (SUS)

PENGARUH SIKAP PERFEKSIONIS TERHADAP WORKAHOLIC YANG DIMEDIASI MOTIVASI KERJA WARTAWAN BANDA ACEH

ABSTRAKPenelitian ini bertujuan untuk mengukur pengaruh Perfeksionis Terhadap Workaholic Yang Di Mediasi Oleh Motivasi Kerja Pada Wartawan di kota Banda Aceh. Sampel yang digunakan dalam penelitian ini adalah Wartawan yang berjumlah 35 responden. Peralatan pengumpulan data yang digunakan pada penelitian ini adalah kuesioner. Teknik pengambilan sampel yang digunakan adalah Non Probability Sampling. Purposive Sampling digunakan sebagai metode analisis untuk mengetahui pengaruh dari semua variabel-variabel yang terlibat.Hasil penilitian ini menunjukkan bahwa Perfeksionis berpengaruh signifikan positif terhadap Motivasi Kerja dan Workaholic, lalu Motivasi Kerja berpengaruh signifikan positif terhadap Workaholic, dan juga diperoleh hasil bahwa Motivasi Kerja memediasi hubungan antara Perfeksionis dan Workaholic.Kata Kunci: Perfeksionis, Motivasi Kerja, Workaholic?ABSTRACTThis study aims to measure the effect of perfectionist influence on Workaholics mediated by work motivation on journalists in the city of Banda Aceh. The sample used in this study was reporters, amounting to 35 respondents. Data collection equipment used in this study was a questionnaire. The sampling technique used is Non Probability Sampling. Purposive Sampling is used as an analytical method to determine the effect of all the variables involved.The results of this study indicate that perfectionists have a significant positive effect on work motivation and Workaholics, then work motivation has a significant positive effect on Workaholics, and also results show that work motivation mediates the relationship between perfectionists and Workaholics.Keywords: Perfectionist, Work Motivation, Workaholi

Hidden Markov Model

Hidden Markov Model (HMM) adalah peluasan dari rantai Markov di mana statenya tidak dapat diamati secara langsung (tersembunyi), tetapi hanya dapat diobservasi melalui suatu himpunan pengamatan lain. Pada HMM terdapat tiga permasalahan mendasar yang harus diselesaikan yakni evaluation problem, decoding problem, dan learning problem. Dalam paper ini, akan dijelaskan tentang Hidden Markov Model(HMM) dan solusi dari ketiga masalah mendasar dalam HMM tersebut, yakni evaluation problem dengan algoritma forward, decoding problem dengan algoritma viterbi, dan learning problem dengan algoritma Baum‐Welch. Kata kunci : Hidden Markov Model, evaluation problem, decoding problem, learning proble

Crypt Edge Detection Using PSO,Label Matrix And BI-Cubic Interpolation For Better Iris Recognition(PSOLB)

Iris identification is an automatic system to recognise an individual in biometric applications.Human iris is an internal organ that can be accessed from external view of the body.Moreover,the structure of the iris is formed in a complete random manner and has unique features such as crypts,furrows,collarets,pupil,freckles, and blotches.In fact, no iris patterns are the same.The iris structure is stable which it means the location of the iris features is permanent at certain point.Nevertheless,the shape of iris features changes slowly due to several factors which include aging,surgery,growth,emotion and dietary habits. Recently,there has been renewed interest in iris features detection.Gabor filter,cross entrophy, upport vector,and canny edge detection are methods which produce iris codes in binary codes representation.However,problems have occurred in iris recognition since low quality iris images are created due to blurriness,indoor or outdoor settings, and camera specifications.Failure was detected in 21% of the intra-class comparisons cases which were taken between intervals of three and six months intervals.However,the mismatch or False Rejection Rate (FRR) in iris recognition is still alarmingly high.Higher FRR also causes the value of Equal Error Rate (EER) to be high.The main reason for high values of FRR and EER is that there are changes in the iris due to the amount of light entering into the iris that changes the size of the unique features in the iris.One of the solutions to this problem is by finding any technique or algorithm to automatically detect the unique features.Therefore a new model is introduced which is called Crypt Edge Detection which combines PSO,Label Matrix,and Bi-Cubic Interpolation for Iris Recognition (PSOLB) to solve the problem of detection in iris features.In this research, the unique feature known as crypts has been chosen due to its accessibility and sustainability.Feature detection is performed using particle swarm optimisation (PSO) as an algorithm to select the best iris texture among the unique iris features by finding the pixel values according to the range of selected features.Meanwhile, label matrix will detect the edge of the crypt and the bi-cubic interpolation technique creates sharp and refined crypt images.In order to evaluate the proposed approach,FAR and FRR are measured using Chinese Academy of Sciences' Institute of Automation (CASIA) database for high quality images.For CASIA version 3 image databases, the crypt feature shows that the result of FRR is 21.83% and FAR is 78.17%.The finding from the experiment indicates that by using the PSOLB,the intersection between FAR and FRR produces the Equal Error Rate (EER) with 0.28%,which indicated that equal error rate is lower than previous value, which is 0.38%.Thus,there are advantages from using PSOLB as it has the ability to adapt with unique iris features and use information in iris template features to determine the user.The outcome of this new approach is to reduce the EER rates since lower EER rates can produce accurate detection of unique features.In conclusion,the contribution of PSOLB brings an innovation to the extraction process in the biometric technology and is beneficial to the communities

A study on consumers preferences towards brand of petrol in Malaysia / Nurul Akmal Yusoff

For this year 2010, all oil and gas companies in Malaysia had plans on attracting more consumers to uses their products. Due to this, the preferences level of the consumers is put into consideration as one of the purposes of the strategies to retain the current customers and attract the new potential customers as well. Malaysia petrol brand which is PETRONAS have to compete with their foreign competitors like SHELL, EXXONMOBILE, BP, and CALTEX who nowadays has extremely develop their technologies to become as one of the main prefer brand of petrol by consumers in this region. Due to that, PETRONAS as well as other oil and gas sectors has to take a full consideration in providing and giving the best service to the customers in Malaysia in order to ensure the plans successfully and achieve the target. This study is made for the purpose of to identify how far those keys factor can have an influence to consumers preferences towards brand of petrol in Malaysia. The first objective of this research is to study on the consumers preferences towards brand of petrol in Malaysia and the researcher used frequency analysis in order to get the result. Secondly the objective is to study the relationship between the dependent and independent variables and Pearson’s correlation coefficient are used to know the relationship between the variable. Thirdly, to identify the most dominant factors that contribute to the consumers’ preferences towards brand of petrol and the researcher used descriptive analysis. Lastly the objective of this research is to propose some recommendation in order to help the management. The result of this study shows the most dominant factors that influence consumers preferences towards brand of petrol and also the recommendation in order to overcome this issue

Numerical solution and spectrum of boundary-domain integral equations

This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.A numerical implementation of the direct Boundary-Domain Integral Equation (BDIE)/ Boundary-Domain Integro-Differential Equations (BDIDEs) and Localized Boundary-Domain Integral Equation (LBDIE)/Localized Boundary-Domain Integro-Differential Equations (LBDIDEs) related to the Neumann and Dirichlet boundary value problem for a scalar elliptic PDE with variable coefficient is discussed in this thesis. The BDIE and LBDIE related to Neumann problem are reduced to a uniquely solvable one by adding an appropriate perturbation operator. The mesh-based discretisation of the BDIE/BDIDEs and LBDIE/LBDIDEs with quadrilateral domain elements leads to systems of linear algebraic equations (discretised BDIE/BDIDEs/LBDIE/BDIDEs). Then the systems obtained from BDIE/BDIDE (discretised BDIE/BDIDE) are solved by the LU decomposition method and Neumann iterations. Convergence of the iterative method is analyzed in relation with the eigen-values of the corresponding discrete BDIE/BDIDE operators obtained numerically. The systems obtained from LBDIE/LBDIDE (discretised LBDIE/LBDIDE) are solved by the LU decomposition method as the Neumann iteration method diverges.This study was funded by the Malaysian Ministry of Higher Education and Sultan Idris Education University

Pengaruh Pupuk Organik Fermentasi Padat Terhadap Pertumbuhan Dan Hasil KedelaI (Glycine max (L) Merrill)

Penelitian ini dilakukan untuk mengetahui pengaruh pupuk organik fermentasi padat terhadap pertumbuhan dan hasil kedelai serta mengetahui dosis pupuk organik fermentasi padat yang terbaik untuk pertumbuhan dan hasil kedelai. Penelitian dilaksanakan di Teaching and Research Farm Fakultas Pertanian Universitas Jambi. Rancangan yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok (RAK) yang terdiri dari lima perlakuan yaitu tanpa pupuk organik fermentasi padat, pupuk organik fermentasi padat 5 ton/ha, 10 ton/ha, 15 ton/ha dan 20 ton/ha. Variabel yang diamati yaitu tinggi tanaman, jumlah bintil akar, jumlah bintil akar efektif, bobot kering akar, bobot kering tajuk, jumlah cabang primer, jumlah polong per tanaman, jumlah polong berisi per tanaman, bobot 100 biji dan hasil. Hasil penelitian menunjukkan bahwa Pemberian pupuk organik fermentasi padat pada dosis yang berbeda memberikan pengaruh yang nyata terhadap jumlah bintil akar efektif, bobot kering akar dan bobot 100 biji. Sedangkan pada variabel tinggi tanaman, jumlah bintil akar, bobot kering tajuk, jumlah cabang primer, jumlah polong per tanaman, jumlah polong berisi per tanaman dan hasil kedelai pengaruhnya tidak nyata. Tanaman kedelai yang diberikan pupuk organik fermentasi padat dengan dosis 10 ton/ha menghasilkan bobot 100 biji terbaik