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2014

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Articles 121 - 150 of 546

Full-Text Articles in Statistics and Probability

Targeted Learning Of An Optimal Dynamic Treatment, And Statistical Inference For Its Mean Outcome, Mark J. Van Der Laan, Alexander R. Luedtke Sep 2014

Targeted Learning Of An Optimal Dynamic Treatment, And Statistical Inference For Its Mean Outcome, Mark J. Van Der Laan, Alexander R. Luedtke

U.C. Berkeley Division of Biostatistics Working Paper Series

Suppose we observe n independent and identically distributed observations of a time-dependent random variable consisting of baseline covariates, initial treatment and censoring indicator, intermediate covariates, subsequent treatment and censoring indicator, and a final outcome. For example, this could be data generated by a sequentially randomized controlled trial, where subjects are sequentially randomized to a first line and second line treatment, possibly assigned in response to an intermediate biomarker, and are subject to right-censoring. In this article we consider estimation of an optimal dynamic multiple time-point treatment rule defined as the rule that maximizes the mean outcome under the dynamic treatment, …

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On Second Order Elliptic Equations And Variational Inequalities With Anisotropic Principal Operators, Vy Khoi Le Sep 2014

On Second Order Elliptic Equations And Variational Inequalities With Anisotropic Principal Operators, Vy Khoi Le

Mathematics and Statistics Faculty Research & Creative Works

This paper is about boundary value problems of the form where ƨ is a convex function of ξ.∈ RN rather than a function of the norm|ξ|. The problem is formulated appropriately in an anisotropic Orlicz-Sobolev space associated with ƨ. We study the existence of solutions and some other properties of the above problem and its corresponding variational inequality in such space.

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Generalized Least-Squares Regressions Iv: Theory And Classification Using Generalized Means, Nataniel Greene Sep 2014

Generalized Least-Squares Regressions Iv: Theory And Classification Using Generalized Means, Nataniel Greene

Publications and Research

The theory of generalized least-squares is reformulated here using the notion of generalized means. The generalized least-squares problem seeks a line which minimizes the average generalized mean of the square deviations in x and y. The notion of a generalized mean is equivalent to the generating function concept of the previous papers but allows for a more robust understanding and has an already existing literature. Generalized means are applied to the task of constructing more examples, simplifying the theory, and further classifying generalized least-squares regressions.

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Quantifying Market Inefficiencies In The Baseball Players’ Market, Benjamin Baumer, Andrew Zimbalist Sep 2014

Quantifying Market Inefficiencies In The Baseball Players’ Market, Benjamin Baumer, Andrew Zimbalist

Mathematics Sciences: Faculty Publications

Among the central arguments of the bestselling book and movie Moneyball was the allegation that the labor market for baseball players was inefficient in 2002. At that time, Billy Beane and the Oakland Athletics used observations made by statistical analysts to exploit this market inefficiency, and acquire productive players on the cheap. Econometric analysis published in 2006 and 2007 confirmed the presence of an inefficient market for baseball players, but left open the question of to what extent, and how quickly, a market correction would occur. We find that this market had in fact already corrected by 2006, and moreover …

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Characterizations Of A Class Of Distributions By Dual Generalized Order Statistics And Truncated Moments, Filippo Domma, Gholamhossein Hamedani Sep 2014

Characterizations Of A Class Of Distributions By Dual Generalized Order Statistics And Truncated Moments, Filippo Domma, Gholamhossein Hamedani

Mathematics, Statistics and Computer Science Faculty Research and Publications

The problem of characterizing a distribution is an important problem which has recently attracted the attention of many researchers. Thus, various characterizations have been established in many different directions. The present work deals with the characterizations of a general class of distributions. These characterizations are based on: (i) a simple relationship between two truncated moments, (ii) truncated moment of certain functions of the nth order statistic, (iii) single truncated moment of certain functions of the random variable and (iv) moments of dual generalized order statistics.We like to mention that the characterization (i) which is expressed in terms of the ratio …

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Existence Of Disjoint Weakly Mixing Operators That Fail To Satisfy The Disjoint Hypercyclicity Criterion, Rebecca Sanders, Stanislav Shkarin Sep 2014

Existence Of Disjoint Weakly Mixing Operators That Fail To Satisfy The Disjoint Hypercyclicity Criterion, Rebecca Sanders, Stanislav Shkarin

Mathematics, Statistics and Computer Science Faculty Research and Publications

No abstract provided.

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Pharyngeal And Cervical Cancer Incidences Significantly Correlate With Personal Uv Doses Among Whites In The United States, Dianne E. Godar, Rong Tang, Stephen Merrill Sep 2014

Pharyngeal And Cervical Cancer Incidences Significantly Correlate With Personal Uv Doses Among Whites In The United States, Dianne E. Godar, Rong Tang, Stephen Merrill

Mathematics, Statistics and Computer Science Faculty Research and Publications

Because we found UV-exposed oral tissue cells have reduced DNA repair and apoptotic cell death compared with skin tissue cells, we asked if a correlation existed between personal UV dose and the incidences of oral and pharyngeal cancer in the United States. We analyzed the International Agency for Research on Cancer's incidence data for oral and pharyngeal cancers by race (white and black) and sex using each state's average annual personal UV dose. We refer to our data as ‘white’ rather than ‘Caucasian,’ which is a specific subgroup of whites, and ‘black’ rather than African-American because blacks from other countries …

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Optimalisasi Sistem Pelayanan Kesehatan Berjenjang Pada Program Kartu Jakarta Sehat, Fachmi Idris Aug 2014

Optimalisasi Sistem Pelayanan Kesehatan Berjenjang Pada Program Kartu Jakarta Sehat, Fachmi Idris

Kesmas

Peningkatan jumlah kunjungan pasien ke rumah sakit pada awal masa pemberlakuan program Kartu Jakarta Sehat (KJS) disebabkan belum optimalnya sistem pelayanan kesehatan berjenjang. PT Asuransi Kesehatan (PT Askes) bersama Dinas Kesehatan DKI Jakarta melakukan berbagai upaya dalam bentuk paket intervensi untuk mengoptimalkan sistem tersebut. Penelitian ini bertujuan untuk mengevaluasi efektivitas paket intervensi PT Askes dan Dinas Kesehatan DKI Jakarta dalam meningkatkan optimilisasi sistem rujukan pelayanan kesehatan. Penelitian ini menggunakan survei potong lintang dengan metode pengambilan sampel acak pada puskesmas di DKI Jakarta terhadap hasil intervensi PT Askes. Hasil intervensi diukur melalui wawancara pada kepala puskesmas atau petugas yang mewakili. Data …

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Penelitian Genom Dan Implikasinya Dalam Kesehatan Masyarakat Di Indonesia, Doni Hikmat Ramdhan Aug 2014

Penelitian Genom Dan Implikasinya Dalam Kesehatan Masyarakat Di Indonesia, Doni Hikmat Ramdhan

Kesmas

Penelitian genom yang mengkaji kaitan antara setiap gen dengan suatu penyakit sekaligus mekanismenya untuk mendapatkan pengetahuan yang menyeluruh dalam pengobatan, telah membawa perubahan besar dunia kedokteran dalam mengobati berbagai penyakit. Namun demikian, penelitian genom seharusnya tidak hanya dimanfaatkan untuk pengobatan tetapi juga untuk pencegahan penyakit. Artikel ini membahas masalah kesehatan masyarakat dan peluang pemanfaatan penelitian genom dalam pencegahan penyakit. Penelitian genom yang dapat dimanfaatkan pada bidang kesehatan masyarakat adalah toksikogenomik dan nutrigenomik. Penelitian toksikogenomik mengkaji respons gen akibat pajanan toksikan yang berdampak pada kesehatan manusia. Penelitian nutrigenomik mengkaji respons gen terhadap makanan yang berdampak pada kesehatan manusia. Penelitian toksikogenomik dan …

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Pengaruh Pendekatan Child Healthcare Modeldan Transtheoretical Model Terhadap Asupan Makan Anak Overweight Dan Obesitas, Kadek Ayu Erika, Elly Nurachmah Aug 2014

Pengaruh Pendekatan Child Healthcare Modeldan Transtheoretical Model Terhadap Asupan Makan Anak Overweight Dan Obesitas, Kadek Ayu Erika, Elly Nurachmah

Kesmas

Overweight dan obesitas pada anak merupakan suatu masalah yang kompleks disebabkan multifaktor, yaitu interaksi genetik dan lingkungan. Gaya hidup perkotaan dipicu oleh asupan makanan yang berlebih pada anak overweight dan obesitas. Strategi untuk menurunkan asupan makan berlebih pada anak adalah dengan pendekatan child healthcare model dan transtheoretical model sehingga dapat mengendalikan gaya hidup anak. Penelitian ini bertujuan membuktikan pengaruh pendekatan child healthcare dan transtheoretical model terhadap asupan karbohidrat anak overweight dan obesitas. Penelitian ini dilaksanakan di wilayah kecamatan Biringkanaya dan Tamalanrea, Makassar, pada bulan Agustus 2013 sampai Maret 2014. Desain yang digunakan adalah quasy experiment yaitu pretest and posttest with …

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Tingkat Pengetahuan Dan Persepsi Terhadap Shisha Pada Mahasiswa, Dhimas Nirwana Yudha, Yayi Suryo Prabandari, Purwanta Purwanta Aug 2014

Tingkat Pengetahuan Dan Persepsi Terhadap Shisha Pada Mahasiswa, Dhimas Nirwana Yudha, Yayi Suryo Prabandari, Purwanta Purwanta

Kesmas

Isu yang berkembang terkait pengetahuan dan persepsi seorang calon tenaga kesehatan memengaruhi keberhasilan pelayanan kesehatan dalam menjawab tantangan di masyarakat nantinya. Shisha (rokok dari Timur Tengah) mulai marak di Yogyakarta. Tujuan penelitian ini untuk memperoleh gambaran tentang tingkat pengetahuan dan persepsi terhadap shisha pada mahasiswa reguler tahap akademik Fakultas Kedokteran Universitas Gadjah Mada. Penelitian ini merupakan penelitian deskriptif menggunakan rancangan potong lintang. Sampel penelitian adalah mahasiswa dari tiga program studi yang dilakukan pada bulan September - Oktober 2013. Jumlah responden sebanyak 72 mahasiswa ilmu keperawatan, 74 mahasiswa gizi dan kesehatan dan 258 mahasiswa pendidikan dokter. Pengumpulan data dilakukan dengan kuesioner. …

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Diagnosis Dini Tuberkulosis Pada Kontak Serumah Dengan Penderita Tuberkulosis Paru Melalui Deteksi Kadar Ifn-Γ, Sri Andarini Indreswari, Suharyo Suharyo Aug 2014

Diagnosis Dini Tuberkulosis Pada Kontak Serumah Dengan Penderita Tuberkulosis Paru Melalui Deteksi Kadar Ifn-Γ, Sri Andarini Indreswari, Suharyo Suharyo

Kesmas

Tuberkulosis paru masih merupakan masalah dunia. Indonesia menempati peringkat ke tiga di dunia pada tahun 2012. Target nasional Case Detection Rate tahun 2012 adalah 70%, sedangkan pencapaian Jawa Tengah sebesar 58,48%. Penelitian ini bertujuan untuk memperoleh batas kadar interferon (IFN) γ pada orang kontak serumah dengan penderita tuberkulosis paru sebagai dasar diagnosis dini penyakit tuberkulosis. Penelitian dilakukan secara kohort selama dua tahun (2011 - 2013) di Balai Kesehatan Masyarakat Paru Semarang. Pada akhir penelitian, terdapat 12 responden kontak dan 13 tidak kontak serumah. Uji Wilcoxon menunjukkan perbedaan bermakna rerata kadar IFN-γ antara kelompok kontak dengan kelompok tidak kontak serumah (nilai …

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Peningkatan Determinan Sosial Dalam Menurunkan Kejadian Tuberkulosis Paru, Dyah Wulan Sumekar Rengganis Wardani Aug 2014

Peningkatan Determinan Sosial Dalam Menurunkan Kejadian Tuberkulosis Paru, Dyah Wulan Sumekar Rengganis Wardani

Kesmas

Upaya pengendalian tuberkulosis paru oleh World Health Organization telah meningkatkan angka kesembuhan dan menyelamatkan banyak jiwa, tetapi kurang berhasil dalam menurunkan insiden tuberkulosis. Oleh karena itu, pengendalian tuberkulosis akan lebih menekankan pada kebijakan determinan sosial karena determinan sosial secara langsung maupun melalui faktor risiko tuberkulosis berpengaruh terhadap tuberkulosis. Di Bandar Lampung, angka notifikasi tuberkulosis dari tahun 2009 – 2010 mengalami peningkatan walaupun angka kesembuhan sudah lebih dari 85%. Bandar Lampung juga merupakan bagian dari salah satu provinsi termiskin di Indonesia. Penelitian ini bertujuan untuk mempelajari pengaruh determinan sosial (yang diukur melalui indikator pendidikan, pendapatan dan kelas sosial) terhadap kejadian tuberkulosis. …

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Pertumbuhan Dan Perkembangan Anak Usia 3-24 Bulan Di Daerah Konflik, Hastuti Usman, Hadyana Sukandar, Ma’Mun Sutisna Aug 2014

Pertumbuhan Dan Perkembangan Anak Usia 3-24 Bulan Di Daerah Konflik, Hastuti Usman, Hadyana Sukandar, Ma’Mun Sutisna

Kesmas

Lima tahun pertama adalah masa penting dalam proses tumbuh kembang anak. Anak lahir dan tinggal di daerah rawan bencana (bencana alam, perang, atau konflik bersenjata) berisiko mengalami kegagalan pertumbuhan dan keterlambatan perkembangan. Penelitian ini bertujuan mengukur perbedaan pertumbuhan dan perkembangan anak usia 3 - 24 bulan antara yang tinggal di daerah konflik dan bukan konflik dan menganalisis korelasi tempat tinggal daerah konflik dengan pertumbuhan serta perkembangan anak usia 3 - 24 bulan. Metode penelitian secara potong lintang dilakukan di Kabupaten Poso periode Februari - Maret 2014 terhadap 40 anak usia 3 - 24 bulan di daerah konflik dan bukan konflik. …

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Malnutrisi Akut Berat Dan Determinannya Pada Balita Di Wilayah Rural Dan Urban, Titih Huriah, Laksono Trisnantoro, Fitri Haryanti, Madarina Julia Aug 2014

Malnutrisi Akut Berat Dan Determinannya Pada Balita Di Wilayah Rural Dan Urban, Titih Huriah, Laksono Trisnantoro, Fitri Haryanti, Madarina Julia

Kesmas

Malnutrisi akut berat merupakan malnutrisi yang paling serius yang memengaruhi balita dan merupakan masalah kesehatan utama di negara-negara berkembang. Malnutrisi telah meluas baik di perkotaan maupun perdesaan. Akar permasalahan malnutrisi di negara berkembang salah satunya adalah faktor sosial demografi. Tujuan penelitian untuk melihat perbedaan kejadian malnutrisi dan determinannya di area perkotaan dan pedesaan di Yogyakarta. Penelitian menggunakan desain potong lintang dengan responden adalah semua balita malnutrisi akut berat di Kabupaten Sleman (23 balita) dan Kota Yogyakarta (33 balita). Analisis data menggunakan statistik deskriptif dan inferensial. Penelitian dilaksanakan pada Bulan Desember 2012 - Februari 2013. Prevalensi balita malnutrisi akut lebih banyak …

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Pendapatan Daerah, Pembiayaan Kesehatan, Dan Gizi Buruk Pada Balita: Studi Korelasi Tingkat Kabupaten/Kota, Septyana Choirunisa, Asri C. Adisasmita Aug 2014

Pendapatan Daerah, Pembiayaan Kesehatan, Dan Gizi Buruk Pada Balita: Studi Korelasi Tingkat Kabupaten/Kota, Septyana Choirunisa, Asri C. Adisasmita

Kesmas

Pendanaan kesehatan merupakan salah satu faktor penting dalam memengaruhi derajat kesehatan, termasuk salah satu masalah gizi pada balita yang disebut gizi buruk. Oleh karena itu, penelitian ini bertujuan mendeskripsikan pendapatan daerah dan pembiayaan kesehatan serta korelasinya dengan gizi buruk pada balita di tingkat kabupaten/kota di Indonesia tahun 2007. Penelitian ini merupakan studi ekologi/korelasi. Data pendapatan daerah dan pembiayaan kesehatan didapat dari Kementerian Keuangan, sedangkan data gizi buruk menggunakan data Riset Kesehatan Nasional tahun 2007. Sebanyak 250 kabupaten/kota yang diteliti dengan tidak mengikutsertakan kabupaten/kota yang datanya tidak lengkap atau tidak valid. Secara nasional, hanya persentase pendapatan asli daerah (PAD) per total …

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Evaluasi Pelaksanaan Konseling Menyusui, Ika Murtiyarini, Dewi Marhaeni Diah Herawati, Irvan Afriandi Aug 2014

Evaluasi Pelaksanaan Konseling Menyusui, Ika Murtiyarini, Dewi Marhaeni Diah Herawati, Irvan Afriandi

Kesmas

Salah satu upaya pemerintah dalam meningkatkan pemberian ASI di Indonesia adalah dengan memberikan konseling menyusui di pelayanan kesehatan. Penelitian perlu dilakukan untuk mengevaluasi pelaksanaan konseling menyusui di Kota Jambi dengan mengeksplorasi komponen input, activity, output, dan outcome. Penelitian ini merupakan penelitian kualitatif menggunakan strategi studi kasus. Penelitian dilakukan di empat puskesmas Kota Jambi pada bulan Desember 2013 sampai dengan Februari 2014. Pengumpulan data dilakukan dengan studi dokumen, observasi pelaksanaan konseling menyusui dan sarana prasarana, wawancara mendalam, serta focus group discussion. Analisis data yang digunakan adalah analisis tematik. Hasil penelitian menunjukkan bahwa komponen input dan activity kurang optimal seperti kurangnya sumber …

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Pattern Of Household Drug Storage, Retno Gitawati Aug 2014

Pattern Of Household Drug Storage, Retno Gitawati

Kesmas

Household storage of pharmaceutical is world-widely practice, including in Indonesia. The purpose of this study was to obtain the pattern of medicine storage, the sources and reasons of medicine kept in households. Acrosssectional survey was conducted on October 2011, involving 250 adult household respondents, randomly selected from three subdistricts in North Jakarta, and have approved the written consents, and interviewed with structured questionnaire. Data were performed in univariate and bivariate analysis with chi square test. The majority of household (82%) stored drugs at home; analgesic-antipyretic nonsteroidal anti-inflammatory was the type of drugs kept by mostly (76.1%) of household. Out of …

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Family Role Towards Smoking Behaviour Among Children In Jakarta, Wahyu Septiono, Dan Wolf Meyrowitsch Aug 2014

Family Role Towards Smoking Behaviour Among Children In Jakarta, Wahyu Septiono, Dan Wolf Meyrowitsch

Kesmas

In Indonesia, the prevalence of smoking among 5 – 9 years old children has increased from 0.4% in 2001 to 2% in 2007. Among present adults smokers (>20 years), 17% started to smoke before the age of 13 years. This study identified factors related to smoking behaviour among 8 – 12 years old children in Jakarta, Indonesia using a questionnaire based cross sectional survey to obtain smoking status and possible predictors towards smoking habit. The total sample size was 1,097 students among 3rd - 7th grade students from schools in Jakarta. Self-reported smoking status was defined as whether the …

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Asupan Karbohidrat Sebagai Faktor Dominan Yang Berhubungan Dengan Kadar Gula Darah Puasa, Aprilya Roza Werdani, Triyanti Triyanti Aug 2014

Asupan Karbohidrat Sebagai Faktor Dominan Yang Berhubungan Dengan Kadar Gula Darah Puasa, Aprilya Roza Werdani, Triyanti Triyanti

Kesmas

Peningkatan kadar gula darah memicu peningkatan produksi hormon insulin yang erat hubungannya dengan diabetes melitus. Berdasarkan data Riskesdas, prevalensi diabetes melitus di Indonesia meningkat dari 1,1% (2007) menjadi 2,1% (2013). Penelitian ini bertujuan untuk mengetahui faktor dominan yang berhubungan dengan kadar gula darah puasa pegawai pemberdayaan masyarakat & keluarga dan pegawai sekretariat daerah Kota Depok. Desain penelitian yang digunakan adalah potong lintang dan melibatkan 105 sampel. Variabel independen penelitian meliputi karakteristik individu, asupan zat gizi, hipertensi, aktivitas fisik, status gizi dan pengetahuan gizi. Analisis data yang dilakukan adalah analisis univariat, analisis bivariat menggunakan uji korelasi dan uji beda dua mean, …

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Asupan Vitamin D Rendah Dan Keparahan Demam Berdarah Dengue Pada Anak Usia 1-14 Tahun, Nur Siyam, Siswanto Agus Wilopo, Mohammad Hakimi Aug 2014

Asupan Vitamin D Rendah Dan Keparahan Demam Berdarah Dengue Pada Anak Usia 1-14 Tahun, Nur Siyam, Siswanto Agus Wilopo, Mohammad Hakimi

Kesmas

Demam berdarah dengue (DBD) menimbulkan syok dan kematian. Penderita DBD di Yogyakarta sebagian besar usia 1 - 12 tahun dengan DBD parah. Asupan vitamin D rendah diasumsikan penyebab DBD parah. Asumsi ini perlu dibuktikan dengan menganalisis pengaruh asupan Vitamin D dan keparahan DBD. Rancangan penelitian adalah studi kasus kontrol. Penelitian di bangsal rawat inap anak dan instalasi catatan medik RS Jogja dan RSUP Dr. Sardjito. Kasus adalah anak usia 1 - 14 tahun dengan DBD grade III & IV, kontrolnya DBD grade I & II. Data asupan vitamin D diambil dengan food frequency questionnaire (FFQ). Variabel luar adalah indeks massa …

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Fertilitas Remaja Di Indonesia, Mugia Bayu Raharja Aug 2014

Fertilitas Remaja Di Indonesia, Mugia Bayu Raharja

Kesmas

Fertilitas remaja merupakan isu penting dari segi kesehatan dan sosial karena berhubungan dengan tingkat morbiditas serta mortalitas ibu dan anak. Tujuan penelitian adalah mempelajari faktor-faktor yang memengaruhi fertilitas remaja di Indonesia. Data yang digunakan adalah hasil Survei Demografi dan Kesehatan Indonesia tahun 2012 dengan unit analisis wanita usia subur yang termasuk dalam kategori usia remaja (15 - 19 tahun). Jumlah sampel sebanyak 6.927 responden. Analisis dilakukan dengan metode deskriptif dan inferensial menggunakan model regresi logistik biner. Hasil analisis menunjukkan bahwa satu dari sepuluh remaja wanita tersebut pernah melahirkan dan atau sedang hamil saat survei dilakukan; sebesar 95,2% dari remaja yang …

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Inferences In Log-Rate Models, Herbert C. Heien, William A. Baumann Aug 2014

Inferences In Log-Rate Models, Herbert C. Heien, William A. Baumann

Journal of Undergraduate Research at Minnesota State University, Mankato

Log-Rate models are used in analyzing rates of individuals who are exposed to a risk of having a certain characteristic. The explanatory variables could be categorical or in a continuous scale. In finding a Log-Rate Model, parameters are estimated and goodness-of-fit are studied to carefully extract the best model to fit our data. Here we revisit three aspects of Log-Rate Models using the data set give at the end of the paper. The three aspects are parameter estimation, goodness-of-fit of the model, and marginal effect of the factors.

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Towards A Lightweight Approach For Modding Serious Educational Games: Assisting Novice Designers, Jacob Dahleen, Alex Hunsberger, Ryan Weber, Dennis Brylow, C. Shaun Longstreet, Kendra M. L. Cooper Aug 2014

Towards A Lightweight Approach For Modding Serious Educational Games: Assisting Novice Designers, Jacob Dahleen, Alex Hunsberger, Ryan Weber, Dennis Brylow, C. Shaun Longstreet, Kendra M. L. Cooper

Mathematics, Statistics and Computer Science Faculty Research and Publications

Serious educational games (SEGs) are a growing segment of the education community’s pedagogical toolbox. Effectively creating such games remains challenging, as teachers and industry trainers are content experts; typically they are not game designers with the theoretical knowledge and practical experience needed to create a quality SEG. Here, a lightweight approach to interactively explore and modify existing SEGs is introduced, a toll that can be broadly adopted by educators for pedagogically sound SEGs. Novice game designers can rapidly explore the educational and traditional elements of a game, with a stress on tracking the SEG learning objectives, as well as allowing …

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Bird Keeping And Lung Cancer, Andrew Tackmann, Jonathan Hellman, Jamie Johnson Aug 2014

Bird Keeping And Lung Cancer, Andrew Tackmann, Jonathan Hellman, Jamie Johnson

Journal of Undergraduate Research at Minnesota State University, Mankato

Logistic regression is reviewed in estimating parameters and in making inferences about the parameters. A contingency table approach in computing goodness of fit in logistic regression is elaborated. An existing data on a sample of lung cancer patients and a control group is used to apply the procedures discussed. The data reveals that between the groups considered, the factors ‘bird keeping’ and ‘the number of years of smoking’ are significant as the causes for lung cancer.

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The Selecting And Risk Analysis Of Temporary Anchor Positions In The Port Area Of Qinhuangdao, Shangying Zhang Aug 2014

The Selecting And Risk Analysis Of Temporary Anchor Positions In The Port Area Of Qinhuangdao, Shangying Zhang

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

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Analysis Of Energy-Based Carbon Emission From Landside Operations Of Container Terminal And Its Abatement Strategies, Dwi Astuti Aug 2014

Analysis Of Energy-Based Carbon Emission From Landside Operations Of Container Terminal And Its Abatement Strategies, Dwi Astuti

World Maritime University Dissertations

No abstract provided.

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Mathematical Modeling And Simulation Of Multialleic Migration-Selection Models, Chad N. Vidden Aug 2014

Mathematical Modeling And Simulation Of Multialleic Migration-Selection Models, Chad N. Vidden

Journal of Undergraduate Research at Minnesota State University, Mankato

Population ecology is concerned with the growth and decay of specific populations. This field has a variety of applications ranging from evolution and survival at the environmental level to the spread of infectious disease at the cellular and molecular levels. Many ecological circumstances require the use of mathematical methods and reasoning in order to acquire better knowledge of the issue at hand. This study considered and analyzed multiple different mathematical models of population dynamics along with their purposes. This foundation was then applied in order to explore the migration of populations from one isolated region to another along with the …

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Directed Energy Active Illumination For Near-Earth Object Detection, Jordan Riley, Philip Lubin, Gary B. Hughes, Hugh O'Neill, Peter Meinhold, Jonathan Suen, J Bible, Isabella E. Johansson, Janelle Griswold, Brianna Cook Aug 2014

Directed Energy Active Illumination For Near-Earth Object Detection, Jordan Riley, Philip Lubin, Gary B. Hughes, Hugh O'Neill, Peter Meinhold, Jonathan Suen, J Bible, Isabella E. Johansson, Janelle Griswold, Brianna Cook

Statistics

On 15 February 2013, a previously unknown ~20 m asteroid struck Earth near Chelyabinsk, Russia, releasing kinetic energy equivalent to ~570 kt TNT. Detecting objects like the Chelyabinsk impactor that are orbiting near Earth is a difficult task, in part because such objects spend much of their own orbits in the direction of the Sun when viewed from Earth. Efforts aimed at protecting Earth from future impacts will rely heavily on continued discovery. Ground-based optical observatory networks and Earth-orbiting spacecraft with infrared sensors have dramatically increased the pace of discovery. Still, less than 5% of near-Earth objects (NEOs) 100 m/~100 …

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De-Starlite: A Directed Energy Planetary Defense Mission, Kelly Kosmo, Mark Pryor, Philip Lubin, Gary B. Hughes, Hugh O'Neill, Peter Meinhold, Jonathan Suen, Jordan Riley, Janelle Griswold, Brianna Vail Cook, Isabella E. Johansson, Qicheng Zhang, Kevin Walsh, Carl Melis, Miikka Kangas, J Bible, Caio Motta, Travis Brashears, Shana Mathew, Justin Bollag Aug 2014

De-Starlite: A Directed Energy Planetary Defense Mission, Kelly Kosmo, Mark Pryor, Philip Lubin, Gary B. Hughes, Hugh O'Neill, Peter Meinhold, Jonathan Suen, Jordan Riley, Janelle Griswold, Brianna Vail Cook, Isabella E. Johansson, Qicheng Zhang, Kevin Walsh, Carl Melis, Miikka Kangas, J Bible, Caio Motta, Travis Brashears, Shana Mathew, Justin Bollag

Statistics

This paper presents the motivation behind and design of a directed energy planetary defense system that utilizes laser ablation of an asteroid to impart a deflecting force on the target. The proposed system is called DE-STARLITE for Directed Energy System for Targeting of Asteroids and ExploRation – LITE as it is a small, stand-on unit of a larger standoff DE-STAR system. Pursuant to the stand-on design, ion engines will propel the spacecraft from low-Earth orbit (LEO) to the near-Earth asteroid (NEA). During laser ablation, the asteroid itself becomes the "propellant"; thus a very modest spacecraft can deflect an asteroid much …

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