Digital Commons Network^™

Metal Modulation Epitaxy Growth For Extremely High Hole Concentrations Above 10(19) Cm(-3) In Gan, Gon Namkoong, Elaissa Trybus, Kyung Keun Lee, Michael Moseley, W. Alan Doolittle, David C. Look

Applied Research Center Publications

The free hole carriers in GaN have been limited to concentrations in the low 10¹⁸ cm⁻³ range due to the deep activation energy, lower solubility, and compensation from defects, therefore, limiting doping efficiency to about 1%. Herein, we report an enhanced doping efficiency up to ~10% in GaN by a periodic doping, metal modulation epitaxy growth technique. The hole concentrations grown by periodically modulating Ga atoms and Mg dopants were over ~1.5 x 10¹⁹ cm⁻³.

© 2008 American Institute of Physics.

Unit Rectangle Visibility Graphs, Alice M. Dean, Joanna A. Ellis-Monaghan, Sarah J. Hamilton, Greta Pangborn

Mathematics, Statistics and Computer Science Faculty Research and Publications

Over the past twenty years, rectangle visibility graphs have generated consider- able interest, in part due to their applicability to VLSI chip design. Here we study unit rectangle visibility graphs, with fixed dimension restrictions more closely modeling the constrained dimensions of gates and other circuit components in computer chip applications. A graph G is a unit rectangle visibility graph (URVG) if its vertices can be represented by closed unit squares in the plane with sides parallel to the axes and pairwise disjoint interiors, in such a way that two vertices are adjacent if and only if there is a non-degenerate …

Peningkatan Kualitas Pembelajaran Pemrograman Komputer Melalui Perkuliahan Online Pada Mahasiswa Program Studi Pendidikan Matematika Fmipa Universitas Negeri Yogyakarta, Sri Andayani, Kana Hidayati, Sahid Sahid

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Penelitian ini bertujuan untuk meningkatkan kualitas pembelajaran Pemrograman Komputer melalui perkuliahan online. Jenis penelitian yang dilakukan adalah penelitian tindakan kelas, yang dilaksanakan dalam 2 siklus dengan subjek penelitian adalah mahasiswa Program Studi Pendidikan Matematika FMIPA Universitas Negeri Yogyakarta yang menempuh mata kuliah Pemrograman Komputer semester gasal tahun akademik 2005/2006. Kegiatan siklus I meliputi perencanaan, tindakan, monitoring, refleksi dan evaluasi. Kegiatan siklus II merupakan tindak lanjut dan modifikasi dari siklus I. Instrumen yang digunakan dalam penelitian ini adalah angket kemampuan awal mahasiswa dalam memanfaatkan komputer, ujian tertulis dan tugas, angket respons mahasiswa, dan lembar observasi pelaksanaan pembelajaran.Hasil penelitian menunjukkan bahwa melalui …

Upaya Peningkatan Kualitas Pembelajaran Kalkulus Diferensial Dengan Menggunakan Program Maple Pada Mahasiswa Prodi Matematika Fmipa Uny, Atmini Dhoruri, Endang Listyani, Raden Rosnawati, Sri Andayani

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Penelitian ini bertujuan untuk meningkatkan prestasi belajar dan minat mahasiswa dalam matakuliah Kalkulus Diferensial dengan menggunakan program Maple .Pendekatan penelitian yang digunakan adalah penelitian tindakan kelas, dengan mengambil langkah-langkah : observasi awal, perencanaan, implementasi tindakan, observasi dan refleksi. Kegiatan ini berulang dalam 3 siklus, dengan tindakan perkuliahan yang disertai dengan praktikum komputer dengan program Maple. Instrumen penelitian terdiri dari tes prestasi belajar, lembar observasi dan angket minat. Hasil penelitian menunjukkan bahwa (1) Pada siklus I dosen telah mengupayakan terlaksananya pembelajaran yang baik, namun keberanian mahasiswa untuk mengemukakan pendapat dan pertanyaan, diskusi untuk menyelesaikan masalah masih dalam taraf cukup. Dalam pelaksanaan …

Meningkatkan Kreativitas Siswa Melalui Problem Posing, Ali Mahmudi

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Di dunia yang begitu cepat berubah, kreativitas menjadi penentu keunggulan. Daya kompetitif suatu bangsa sangat ditentukan pula oleh kreativitas sumber daya manusianya. Tidak sebagaimana pandangan klasik yang menganggap kreativitas sebagai kemampuan yang hanya dimiliki oleh individu luar biasa, pandangan terkini mengenai kreativitas menempatkannya sebagai kemampuan yang dapat dibentuk atau dikembangkan melalui berbagai usaha, termasuk melalui kegiatan pembelajaran yang terencana dengan baik. Dalam artikel ini dikemukakan mengenai keterkaitan problem posing yang diterapkan dalam kegiatan pembelajaran dan pengembangan kemampuan siswa terhadap tiga dimensi utama kreativitas, yaitu kefasihan (fluency), fleksibilitas (flexibility), dan kebaruan (novelty).
Kata kunci: kreativitas, problem posing

Pendugaan Parameter Regresi Logistik Dengan Jaringan Syaraf Tiruan, Anik Djuraidah

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Logistic regression can be mapped equivalent to artificial neural network (ANN) without hidden layer with logistic as activation function, hence logistic regression is subset of ANN. The result study on binary and poly-chotomous response data show that parameter estimation values of ANN and logistic regression are similar. In comparison with ANN, logistic regression has standard procedure for estimation and testing parameter.
Keyword : logistic regression, generalized linear model, artificial neural network, activation function, hidden layer

Masalah Norm Minimum Pada Ruang Hilbert Dan Aplikasinya, Karyati Karyati, Dhoriva Urwatul Wutsqa

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

In this paper, will be discussed about the minimum norm in the pre- Hilbert Space, Hilbert space and its modification, and its application. The results are: Let X be a pre-Hilbert space and M is a sub space of X. If an element is fixed, then : . If there is such that , then is unique. Let H be a Hilbert space and M be a closed sub space of H . If , then there is a unique element such that , . Let X be a Hilbert space , M be a closed sub space of X …

Inversi Dan Titik-Titik Harmonis, Himmawati Puji, Caturiyati Caturiyati

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Given a circle centre O and radius r in , the inversion in this circle is the mapping defined by , where lies on the straight line through O and A, and on the same side of O as A, and . It will be investigated the property of inversion related to four harmonic points. The result is that the cross-ratio of any four coplanar points A, B, C, D is invariant under inversion. Hence, the inversion preserves the four harmonic points.
Keywords : inversion, cross ratio, four harmonic points.

Analisis Peubah Respon Biner, Kismiantini Kismiantini

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Pada regresi linier klasik, peubah respon diasumsikan merupakan peubah yang bersifat kontinu. Bila peubah respon tidak lagi kontinu melainkan berupa kategori (biner, cacahan) maka model regresi linier klasik tidak dapat digunakan. Permasalahan tersebut dapat diatasi dengan model linier terampat. Model linier terampat yang digunakan dalam menganalisis peubah berskala biner adalah model logit, model probit dan model complementary log-log. Pada tulisan ini akan dikaji penggunaan ketiga model tersebut dalam menganalisis peubah respon biner. Bila nilai galat baku Pearson semakin kecil maka semakin baik pula model yang digunakan.
Kata kunci : peubah respon biner, model logit, model probit, model complementary log- log

Upaya Peningkatan Kemampuan Mahasiswa Dalam Penguasaan Teknologi Pembelajaran Melalui Tugas Pembuatan Media Berbasis Komputer Dalam Perkuliahan Pemrograman Komputer, Sri Andayani, Kuswari Hernawati, Sahid Sahid

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Penelitian tindakan kelas ini bertujuan untuk meningkatkan kemampuan mahasiswa dalam penguasaan teknologi pembelajaran melalui tugas pembuatan media berbasis komputer. Penelitian dilaksanakan dalam dua siklus. Tindakan dalam siklus I adalah pemberian tugas kepada mahasiswa untuk membuat program komputer dalam bahasa Pascal berkaitan dengan masalah sehari-hari. Berdasarkan refleksi siklus I, maka dalam tindakan siklus II mahasiswa diberi tugas membuat media pembelajaran berbasis komputer, yang materinya merupakan pengembangan program yang telah disusun dalam siklus I. Hasil penelitian menunjukkan terjadi peningkatan kemampuan mahasiswa terhadap penguasaan teknologi pembelajaran yang ditunjukkan dengan adanya media pembelajaran berbasis komputer yang telah disusun mahasiswa. Sebanyak 87% mahasiswa mendapatkan nilai …

Upaya Menumbuhkan Dan Meningkatkan Keterampilan Mahasiswa Prodi Pendidikan Matematika Fmipa Uny Dalam Membuat Media Kartun Untuk Pembelajaran Statistika Dan Peluang Di Smp Dan Sma, Kana Hidayati, Djamilah Bondan Widjajanti, Mathilda Susanti, Elly Arliani, Retno Subekti

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Penelitian ini merupakan penelitian tindakan dengan tujuan untuk menumbuhkan dan mengembangkan keterampilan mahasiswa Prodi Pendidikan Matematika FMIPA UNY peserta kuliah Statistika Elementer semester Februari-Juni 2006 dalam membuat media kartun untuk pembelajaran Statistika dan Peluang di SMP dan SMA.Kegiatan penelitian dilaksanakan dalam dua siklus. Pada siklus pertama, setelah mahasiswa memahami materi penyajian data yang disajikan menggunakan media kartun, mahasiswa diberi tugas membuat media kartun untuk pembelajaran Statistika di SMP dan SMA khusus materi penyajian data. Media kartun hasil karya mahasiswa ini selanjutnya dievaluasi oleh tim peneliti, terutama untuk kesesuaian media dengan jenjang pendidikan siswa dan kebenaran media dalam merepresentasikan materi, serta …

Memotivasi Siswa Belajar Geometri Dengan Lingkaran Titik Sembilan, Sugiyono Sugiyono

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Sudah tidak asing lagi jika ada siswa SMP atau SMA yang tidak senang pada pelajaran matematika khususnya Geometri. Hal tersebut mungkin karena mereka belum terbiasa menggeluti atau belajar lebih dalam tentang Geometri Apabila mereka sudah terbiasa belajar atau menekuni lebih dalam tentang geometri ini dimungkinkan mereka justru akan memandang geometri adalah sangat menyenangkan dan terasa indah sekali . Oleh karena itu di sini akan ditunjukkan salah satu keindahan dari geometri yaitu adanya lingkaran titik sembilan. Diharapkan dengan melihat keindahannya siswa akan senang pada Geometri khususnya dan Matematika pada umumnya. Lingkaran ttitik sembilan yang juga disebut lingkaran Feuerbach adalah lingkaran yang …

Hambatan-Hambatan Dalam Mengembangkan Kecerdasan Logical/Mathematical Pada Pembelajaran Terpadu Model Webbed Berbasis Kecerdasan Jamak Di Tkit Salman Al Farisi Ii Yogyakarta(Studi Eksplorasi), Caturiyati Caturiyati, Kana Hidayati, Himmawati Puji Lestari

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

One of the important intelligent component for children's future and need to be developing early is logical/mathematical intelligent. Integrated learning is carried out in learning process that integrates sistematically and holistically the effort of developing child. One of the integrated learning model is webbed model, a learning model that integrates learning and developing for children in a topic that covers some subjects. TKIT Salman Al Farisi II applies learning with themes where those themes become a learning guide in class. It needs to investigate the constraints in optimizing of developing child's logical/mathematical intelligent by integrated learning in TKIT Salman Al …

On The Convergence Theorems Of The Mcshane Integral For Riesz-Spaces-Valued Functions Defined On Real Line, Muslim Ansori, Yosephus D. Sumanto, Novi Rustiana Dewi

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

This paper is a partial result of our researchs in the main topic "On The McShane Integral for Riesz-Spaces-valued Functions Defined on the space ". We have constructed McShane integral for Riesz-spaces-valued functions defined on the space by a technique involving double sequences and proved some basic properties which coincides with the McShane Integral for Banach-spaces valued functions defined on real line. Further, we construct some convergence theorems involving uniformly convergence theorems, monotone convergence theorems and Fatou's lemma in the sense of this integral.
Keywords : Riesz Space, McShane Integral

Menghitung Nilai Probabilitas Pada Distribusi Normal Multivariate, Jaka Nugraha

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Menghitung nilai probabilitas variabel random yang mempunyai distribusi multivariat normal, merupakan salah satu kendala dalam model probit. Persamaan probabilitas dalam model probit tidak berbentuk persamaan tertutup dan harus diselesaikan secara numerik maupun simulasi. Metode Gezn merupakan metode yang paling efektif untuk menghitung nilai probabilitas normal multivariat. Metode ini banyak diimplementasikan dalam beberapa "package" pada program R. Metode ini juga telah diimplementasikan dalam model multinomial probit yang populer disebut dengan simulator Geweke-Hajivassiliou-Keane (GHK).
Kata kunci : model multinomial probit, faktor Cholesky, random utiliti, deret Taylor

Studi Tentang Strategi Guru Dalam Pembelajaran Matematika Menyikapi Pergeseran Paradigma Pendidikan Teacher Centered Ke Student Centered, Endang Listyani

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Educational system in Indonesia has been changing from teacher centered to student centered paradigm. The teacher leads to have an important responsibility to involve in the paradigm changing. Regarding that responsibility, the teacher must have a competency to use the appropriate learning strategy that can engage the student activity in class. The propose of this research is to know the teacher strategy in mathematics learning toward the changing of educational paradigm from teacher centered to student centered. The respondents in this research are the entire mathematics teachers in SMA Negeri at Kotamadya Yogyakarta consisting of 11 schools. Each school has …

Mississippi Business Environment Before And After Katrina: Challenges And Opportunities, Domenico Parisi, Steven Michael Grice, Jed Pressgrove

Journal of Rural Social Sciences

Valid, reliable, and, most importantly, timely information is the most critical aspect for the design and implementation of successful emergency management strategies. This goal, however, is rarely achieved during the aftermath of a disaster. In this paper, we showcase how we used administrative records to assist Mississippi in evaluating the overall impact of Katrina on the state’s economy. Specifically, we assisted the state in developing a methodology to generate valid, reliable, and timely information on (1) the business environment and labor market and (2) rehiring and hiring practices. This information was used by the state to design recovery strategies and …

Optimization Of Optical Computed Tomography Techniques For The Synthesis Of Particle Aggregate Models, Patrick Anthony Giordano Jr.

Theses and Dissertations

The characterization of 3-D shapes of particles in geomaterial aggregate mixtures is important for understanding the micro-mechanics of granular materials. Also, numerical synthesis of 3-D particle shapes from their corresponding shape descriptors is required for developing discrete element models (DEMs) that can be used to predict particle contact-forces, and ultimately the shear strength of the aggregate mixture.

Previous work has shown that Fourier-based 3-D shape descriptors can be constructed for aggregate mixtures, using a statistical combination of 2-D projections. Furthermore, optical tomography methods using the Algebraic Reconstruction Technique (ART) algorithm has proved capable of synthesizing 3-D shapes from 2-D projections, …

Interactive Visualization Of Information Hierarchies And Applications On The Web, Confesor Santiago Iii

Theses and Dissertations

The visualization of information hierarchies is concerned with the presentation of abstract hierarchical information about relationships between various entities. It has many applications in diverse domains such as software engineering, information systems, biology, and chemistry. Information hierarchies are typically modeled by an abstract tree, where vertices are entities and edges represent relationships between entities. The aim of visualizing tree drawings is to automatically produce drawings of trees which clearly reflect the relationships of the information hierarchy.

This thesis is primarily concerned with problems related to the automatic generation of area-efficient grid drawings of trees, interactively visualizing information hierarchies, and applying …

Why The No Child Left Behind Act Needs To Be Restructured To Accomplish Its Goals And How To Do It, Gershon M. Ratner

University of the District of Columbia Law Review

The No Child Left Behind Act ("NCLB" or the "Act") 1 has created a once in a lifetime opportunity to improve American public education. NCLB has embraced vital goals for the new Information Age: academic proficiency for virtually all public school students and elimination of the severe racial/income "achievement gap." The Act provides four pillars on which states and localities might build a bridge to reach the goals: higher standards; periodic testing to measure the extent to which the standards are being met; disaggregating test results by student subgroup; and reporting to the public. The critical question is "how to …

Charter Schools And Special Education: Part Of The Solution Or Part Of The Problem?, Rebekah Gleason

University of the District of Columbia Law Review

The Individuals with Disabilities Education Act (IDEA)1 provides each child with a disability the opportunity to receive educational benefit in an appropriate program. The individual needs of the child drive the often resource intensive programs. On the other hand, public charter schools focus on providing more choices for education by aiming to do a better job with less money. Public Charter Schools accountability for progress and fiscal responsibility means that schools focus on doing more with less resources for the school as a whole. Public Charter schools' mission of unique innovative instruction, free from local and state regulations that would …

Management Of Empty Containers In Liner Shipping : In The Context Of The West African Port Of Abidjan, Côte D'Ivoire, Nadege C. Angbo

World Maritime University Dissertations

No abstract provided.

Muon-Fluorine Entangled States In Molecular Magnets, T Lancaster, S J. Blundell, P J. Baker, M L. Brooks, W Hayes, F L. Pratt, Jamie L. Manson, M M. Conner, J A. Schlueter

Chemistry and Biochemistry Faculty Publications

The information accessible from a muon-spin relaxation experiment can be limited due to a lack of knowledge of the precise muon stopping site. We demonstrate here the possibility of localizing a spin polarized muon in a known stopping state in a molecular material containing fluorine. The muon-spin precession that results from the entangled nature of the muon spin and surrounding nuclear spins is sensitive to the nature of the stopping site. We use this property to identify three classes of sites that occur in molecular magnets and describe the extent to which the muon distorts its surroundings.

Lake Mead National Recreation Area Vegetation Monitoring And Analysis: Quarterly Progress Report, October 1, 2007 To December 31, 2007, Margaret N. Rees

Vegetation Monitoring

Executive Summary

• The Weed Sentry program surveyed more than 750 miles of federal lands in Clark County for invasive, exotic plant species.
• Weed Sentry also removed more than 600,000 individual invasive plants from federal
  lands. These removals represent pro-active efforts that may have forestalled large
  infestations difficult and costly to eradicate.
• In response to a request by the manager of the Fish and Wildlife Service Desert National
  Wildlife Refuge, a major effort of surveying springs for plant community composition
  and invasive plants provided unique knowledge services by the Weed Sentry program.
  No such baseline information existed for the Sheep Range. …

Nevada Interagency Volunteer Program: Helping Hands Across Public Lands – Phase Ii: Quarterly Progress Report, Period Covering October 1 – December 31, 2007, Margaret N. Rees

Get Outdoors Nevada

• The number of records in the volunteer database increased 12% over last quarter. The database now contains 4,937 records.
• Website activity decreased, recording an average of 82,859 hits per month, a decrease of 31% from last quarter, with an average of 8,191 pages viewed per month.
• Volunteer fall training has been completed.
• Three National Public Land Day Events have been completed.
• Two hundred and ten people attended the Volunteer Recognition Event.

Interagency Science And Research: Quarterly Progress Report, Period Ending December 31, 2007, Margaret N. Rees

Interagency Science and Research Strategy

• Meetings were held with the SNAP Recreation Team and the SNAP Cultural Resources Team to request assistance in the development of the science strategy. Draft versions of interagency goals, subgoals, science questions, and associated tasks were given to each team for review and input.
• Plans were prepared for the peer review of science proposals submitted for consideration as Conservations Initiatives in SNPLMA Round 9.
• Proceedings of the natural resources management workshop held on September 13 were completed and sent to the Science & Research Team for review by members.
• An important focus of the Science and Research Team was the …

Limnological Assistance For The Lake Mead National Recreation Area In Meeting The Challenge Of The Water 2025 Initiative: Quarterly Progress Report, Period Ending: December 31, 2007, Margaret N. Rees

Limnological Studies

• The limnologist position has been announced.
• Project 1: Review of the draft Boulder Basin Adaptive Management Plan is underway.
• Project 2: Development of a white paper expressing the joint needs of the entities involved in Water 2025 projects is being coordinated.
• Project 3: A bibliographic reference spreadsheet organizing literature citations related to quagga and zebra mussel research has been completed.
• Project 4: A comprehensive literature search of Lake Mead limnology is well underway; an Access database has been designed to organize reference citations; and a special collections library at UNLV is being established to house original rare documents and other …

Lake Mead National Recreation Area Sensitive Wildlife Species Monitoring And Analysis: Quarterly Progress Report, Period Ending December 31, 2007, Margaret N. Rees

Wildlife Monitoring

Project 1. Relict Leopard Frog Monitoring, Management, and Research

• Fall surveys completed at all natural and translocation sites.
• Coordination for a potential translocation site on BLM lands in the Gold Butte area ongoing – the aim is that this site will be ready for translocations in 2008.
• Coordination ongoing for evaluation of a translocation site on BLM lands in the Black Mountains, AZ – the plan is to complete compliance in 2008.
• Coordination and assistance provided to UNLV research efforts on habitat improvements at Blue Point, Rogers, and Pupfish Refuge springs.
• Relict Leopard Frog Conservation Team meeting held in December. …

Front Matter

Journal of Digital Forensics, Security and Law

No abstract provided.

Back Matter

Journal of Digital Forensics, Security and Law

No abstract provided.