Physical Sciences and Mathematics Commons^™

Estimating Relative Abundance Of Young-Of-Year American Eel, Anguilla Rostrata, In The Virginia Tributaries Of Chesapeake Bay (Spring 2014), Troy D. Tuckey, Mary C. Fabrizio

Reports

The Atlantic States Marine Fisheries Commission (ASMFC) adopted the Interstate Fishery Management Plan (FMP) for the American Eel in November 1999. The FMP calls for efforts to collect American Eel data through both fishery-dependent and fishery-independent studies in coastal states. Consequently, member jurisdictions agreed to implement an annual survey for young-of-year (YOY) American Eels. The survey is intended to “…characterize trends in annual recruitment of the YOY eels over time [to produce a] qualitative appraisal of the annual recruitment of American Eel to the 4 U.S. Atlantic Coast” (ASMFC 2000). The development of these surveys began in 2000 with full …

Vibrational Microspectroscopy For Cancer Screening, Fiona Lyng, Ines Ramos, Ola Ibrahim, Hugh Byrne

Articles

Vibrational spectroscopy analyses vibrations within a molecule and can be used to characterise a molecular structure. Raman spectroscopy is one of the vibrational spectroscopic techniques, in which incident radiation is used to induce vibrations in the molecules of a sample, and the scattered radiation may be used to characterise the sample in a rapid and non-destructive manner. Infrared (IR) spectroscopy is a complementary vibrational spectroscopic technique based on the absorption of IR radiation by the sample. Molecules absorb specific frequencies of the incident light which are characteristic of their structure. IR and Raman spectroscopy are sensitive to subtle biochemical changes …

Multivariate Statistical Methodologies Applied In Biomedical Raman Spectroscopy: Assessing The Validity Of Partial Least Squares Regression Using Simulated Model Datasets, Mark E. Keating, Haq Nawaz, Franck Bonnier, Hugh Byrne

Articles

Raman spectroscopy is fast becoming a valuable analytical tool in a number of biomedical scenarios, most notably disease diagnostics. Importantly, the technique has also shown increasing promise in the assessment of drug interactions on a cellular and subcellular level, particularly when coupled with multivariate statistical analysis. However, an important consideration, both with Raman spectroscopy and the associated statistical methodologies, is the accuracy of these techniques and more specifically the sensitivities which can be achieved and ultimately the limits of detection of the various methods. The purpose of this study is thus the construction of a model simulated data set with …

The Steiner Problem On Closed Surfaces Of Constant Curvature, Andrew Logan

Theses and Dissertations

The n-point Steiner problem in the Euclidean plane is to find a least length path network connecting n points. In this thesis we will demonstrate how to find a least length path network T connecting n points on a closed 2-dimensional Riemannian surface of constant curvature by determining a region in the covering space that is guaranteed to contain T. We will then provide an algorithm for solving the n-point Steiner problem on such a surface.

Re-Calibration Of The Periods Of Selected Cepheids From The Hubble Space Telescope Key Project Using Time Correction, Muxue Liu

Theses and Dissertations

The Hubble Space Telescope (HST) was originally proposed and funded in the 1970's with a launch planned for the early 1980's. However, the launch finally occurred on April 24, 1990, largely due to the Challenger accident. Once launched in 1990, one of HST's earliest projects was the Key Project. One of the main purposes of the Key Project was to calibrate the distances to nearby galaxies and determine a definitive value of the Hubble constant H0. All secondary distance determination methods were based on the period-luminosity relation of Cepheid variable stars. This thesis examines the Cepheid data from the Key …

Detecting Learning Styles In Video Games, Benjamin Cooley

Master's Theses

Video games are increasingly becoming more intelligent, able to adapt themselves to the individual gamer. Learning styles are a set of models used to categorize people into different types of learners to explain why some people learn better through different methods. Since learning and exploration are such fundamental parts of the video game experience, it is interesting to consider the possibility of applying these learning style models to video games, allowing the video game to adapt to its player, providing a better experience. To consider such adaptation, the game must first be able to detect that learning style from how …

Surrogate Markers For Time-Varying Treatments And Outcomes, Jesse Hsu, Edward Kennedy, Jason Roy, Alisa Stephens-Shields, Dylan Small, Marshall Joffe

Edward H. Kennedy

A surrogate marker is a variable commonly used in clinical trials to guide treatment decisions when the outcome of ultimate interest is not available. A good surrogate marker is one where the treatment effect on the surrogate is a strong predictor of the effect of treatment on the outcome. We review the situation when there is one treatment delivered at baseline, one surrogate measured at one later time point, and one ultimate outcome of interest and discuss new issues arising when variables are time-varying. Most of the literature on surrogate markers has only considered simple settings with one treatment, one …

Mind The Gap: Formal Ethics Policies And Chemical Scientists' Everyday Practices In Academia And Industry, Laurel Smith-Doerr, Itai Vardi

Laurel Smith-Doerr

Asymmetrical convergence is the increasing overlap between academic and industrial sectors, but with academia moving closer toward for-profit industrial norms than vice versa. Although this concept, developed by Kleinman and Vallas, is useful, processes of asymmetrical convergence in daily laboratory life are largely unexplored. Here, observations of three lab groups of chemical scientists in academic and industry contexts illustrate variation in interactions with ethics-related policies (as defined by the respondents). Findings show more tension for academic science with business-based practices, such as the move toward greater accountability, than for industrial science with academic practices. This asymmetry is evident in the …

The M-P Relation Of Type 1 Agn In Spiral Galaxies, Amanda Schilling, Logan H. Jones

Amanda Schilling

No abstract provided.

3-Equitable Prime Cordial Labeling Of Some Graphs, Innovative Research Publications Irp India, Sweta Srivastav, Sangeeta Gupta

Innovative Research Publications IRP India

In this paper we have investigated the 3-equitable prime cordial labeling behavior of cycle with one chord, Twin chord, and split graph G

Mathematical Analysis Of Uniform Decahedron Having 10 Congruent Faces Each As A Right Kite By H.C. Rajpoot, Harish Chandra Rajpoot Rajpoot Hcr

Harish Chandra Rajpoot H.C. Rajpoot

All the important parameters of a decahedron having 10 congruent faces each as a right kite have been derived by the author by applying HCR's Theory of Polygon to calculate normal distance of each face from the center, inscribed radius, circumscribed radius, mean radius, surface area & volume. The formula are very useful in analysis, designing & modeling of polyhedrons.

Pseudospherical Surfaces And Evolution Equations In Higher Dimensions, Innovative Research Publications Irp India, M.F. El-Sabbagh, K.R. Abdo

Innovative Research Publications IRP India

In this paper, the study of evolution equations with two independent variables which are related to pseudospherical surfaces in R3 , is extended to evolution equations with more than two independent variables. Equations of the type 𝒖𝒙𝒕 = 𝝍(𝒖, 𝒖𝒙 , … … . . , 𝝏 𝒌𝒖 𝝏 𝒙 𝒌 , 𝒖𝒚, … … … , 𝝏 𝒌ʹ𝒖 𝝏 𝒚 𝒌ʹ ) are studied and characterized. Some features and results on properties of these equations are given via this study.

Polarimetric Modeling Of Corotating Interaction Regions (Cirs) Threading Massive-Star Winds., Richard Ignace, N. St-Louis, F. Proulx-Giraldeau

Richard Ignace

Massive star winds are complex radiation-hydrodynamic (sometimes magnetohydrodynamic) outflows that are propelled by their enormously strong luminosities. The winds are often found to be structured and variable, but can also display periodic or quasi-periodic behavior in a variety of wind diagnostics. The regular variations observed in putatively single stars, especially in UV wind lines, have often been attributed to corotating interaction regions (CIRs) like those seen in the solar wind. We present light curves for variable polarization from winds with CIR structures. We develop a model for a time-independent CIR based on a kinematical description. Assuming optically thin electron scattering, …

Generic Constructions Of Different Cryptographic Primitives Over Various Public Key Paradigms., Sumit Kumar Pandey Dr.

Doctoral Theses

In this thesis, we study the generic construction of some cryptographic primitives over various public key paradigms like traditional Public Key Cryptosystems and Identity Based Cryptosystems. It can be broadly divided into two categories1. Generic construction of some highly secure cryptographic primitives from less secure cryptographic primitives, and2. Generic construction of some complex cryptographic primitives from basic cryptographic primitives. Mathematical tools provide a way to achieve cryptographic functionality like confidentiality, authentication, data-integrity, non-repudiation etc., but in the case of complex cryptographic functionality like achieving confidentiality and authentication at the same time or confidentiality, authentication and non-repudiation at the same time …

Mapping The Decision Points And Climate Information Use Of Agricultural Producers Across The U.S. Corn Belt, Tonya Haigh, Eugene S. Takle, Jeffrey Andresen, Melissa Widhalm, J. Stuart Carlton, Jim Angel

Drought Mitigation Center: Faculty Publications

The usefulness of climate information for agricultural risk management hinges on its availability and relevance to the producer when climate-sensitive decisions are being made. Climate information providers are challenged with the task of balancing forecast availability and lead time with acceptable forecast skill, which requires an improved understanding of the timing of agricultural decision making. Achieving a useful balance may also require an expansion of inquiry to include use of non-forecast climate information (i.e. historical climate information) in agricultural decision making. Decision calendars have proven valuable for identifying opportunities for using different types of climate information. The extent to which …

Self-Organized Assemblies Of Colloidal Particles Obtained From An Aligned Chromonic Liquid Crystal Dispersion, N. Zimmermann, G. Jünnemann-Held, Peter J. Collings, H.-S. Kitzerow

Physics & Astronomy Faculty Works

The behavior of mono-disperse colloidal particles in a chromonic liquid crystal was investigated. Poly(methyl methacrylate) spherical particles with three different functionalizations, with and without surface charges, were utilized in the nematic and columnar phases of disodium cromoglycate solutions. The nematic phase was completely aligned parallel to the glass substrates by a simple rubbing technique, and the columnar phase showed regions of similar alignment. The behavior of the colloidal particles in the chromonic liquid crystal depended critically on the functionality, with bromine functionalized particles not dispersing at all, and cationic trimethylammonium and epoxy functionalized particles dispersing well in the isotropic phase …

A Novel Nitrite Sensing Electrode Based On Au/Fe3O4/Chitosan Nanocomposite, Ying Dong, Yong Wang, Huan-Huan Xing, Jian-Ying Qu

Journal of Electrochemistry

A novel nitrite sensing electrode based on gold nanoparticles and iron oxides (Fe₃O₄) magnetic nanoparticles was fabricated with chitosan as the protective film on glassy carbon matrix. Experiment results showed that the sensing electrode exhibited good electrocatalytic activity toward oxidation of nitrite, and the oxidation peak current increased linearly with the concentration of nitrite varying from 5.0×10^-6 to 2.0×10^-3 mol·L^-1 (R=0.9996) with a detection limit of 7.1×10^-7 mol·L^-1 (S/N=3). The sensing electrode exhibited good sensitivity, selectivity and repeatability.

Determinan Perilaku Tes Hiv Pada Ibu Hamil, Nanik Setiyawati, Niken Meilani

Kesmas

Human immunodeficiency virus (HIV) dan Acquired immune deficiency syndrome (AIDS) merupakan salah satu sorotan dalam pencapaian target Millenium Development Goals (MDGs). Ibu hamil dengan HIV akan berisiko menularkan kepada bayinya. Tes HIV merupakan gerbang pembuka status HIV yang sangat penting dilakukan pada ibu hamil. Penelitian ini bertujuan untuk menentukan determinan perilaku tes HIV pada ibu hamil yaitu tingkat pendidikan, tingkat pengetahuan, persepsi kerentanan diri tertular HIV, sikap, Provider-Initiated Testing and Counselling (PITC) dan ketersediaan sumber informasi (keluarga dan kader kesehatan). Jenis penelitian adalah potong lintang dengan metode survei. Penelitian ini dilakukan di Puskesmas Mantrijeron dan Puskesmas Sleman yang telah memiliki …

Pengaruh Faktor Personal Berpengaruh Terhadap Perilaku Seksual Pranikah Pada Remaja Di Kota Kendari Provinsi Sulawesi Tenggara, Rosdarni Rosdarni, Djaswadi Dasuki, Sumarni Djoko Waluyo

Kesmas

Perilaku seksual pranikah yang tinggi pada remaja disebabkan oleh faktor personal seperti pengetahuan kesehatan seksual, Infeksi Menular Seksual (IMS) dan HIV / AIDS, sikap terhadap seksualitas, harga diri dan efikasi diri. Penelitian ini bertujuan untuk mengetahui pengaruh faktor personal seperti pengetahuan tentang kesehatan seksual, IMS dan HIV / AIDS, sikap, harga diri dan efikasi diri terhadap perilaku seksual pranikah pada remaja di Kota Kendari yang diukur melalui kuesioner dan wawancara mendalam. Desain penelitian adalah studi potong lintang dengan jumlah sampel 200 remaja yang berasal dari empat sekolah negeri di Kota Kendari mulai dari Agustus sampai dengan Oktober 2014. Analisis regresi …

Determinan Stres Pada Pegawai Kementerian Kesehatan Republik Indonesia, Besral Besral, Winne Widiantini

Kesmas

Kejadian stres pada pelbagai kelompok di Indonesia cukup tinggi dan belum banyak diketahui determinannya. Penelitian ini bertujuan untuk mengetahui determinan stres pada pegawai Kementerian Kesehatan Republik Indonesia (Kemenkes RI). Penelitian potong lintang ini dilakukan pada tahun 2013 terhadap 230 pegawai sekretariat jenderal yang dipilih secara acak. Analisis statistik menggunakan regresi logistik ganda. Responden dikatakan stres jika memiliki skor 28 atau lebih dengan menggunakan 17 pertanyaan terkait personal stress inventory. Hasil penelitian menunjukkan prevalensi stres sebesar 79% dan determinan stres adalah obesitas, usia, jabatan, suku, pendidikan, dan aktivitas fisik. Risiko stres lebih tinggi pada pegawai yang obesitas (ORadj = 1,9), pegawai …

Bioindikator Cemaran Timbal Pada Rambut Masyarakat Sekitar Kilang Minyak, Sukar Sukar, Suharjo Suharjo

Kesmas

Timbal atau Plumbum (Pb) bersifat toksik, karsinogenik, bioakumulator dan biomagnifikasi. Bioakumulasi Timbal dari media lingkungan dapat terjadi pada kuku, hati, dan rambut. Tujuan penelitian untuk mengetahui faktor risiko kejadian bioindikator timbal rambut masyarakat di kawasan industri minyak. Penelitian dilakukan pada tahun 2012 di Kota Dumai, Provinsi Riau. Rancangan penelitian khusus pencemaran lingkungan 2012 adalah type- 1 health study, yang disarankan US Agency for Toxic Substances and Drugs Registry (ATSDR). Analisis statistik bivariat dengan uji kai kuadrat. Populasi penelitian adalah penduduk Kota Dumai yang tinggal di desa Jayamukti, Tanjung Palas, Mekarsari, dan Bukit Timah. Sejumlah 110 ibu rumah tangga diambil dengan …

Risiko Ergonomi Ketidaksesuaian Desain Dan Ukuran Tempat Duduk Sepeda Motor Terhadap Antropometri Pada Mahasiswa, Zulkifli Djunaidi, Rahmadani Arnur

Kesmas

Transportasi merupakan hal yang sangat dibutuhkan dalam menunjang pembangunan nasional. Belum baiknya sistem transportasi massal di Indonesia, membuat masyarakat lebih memilih menggunakan kendaraan pribadi, seperti sepeda motor yang praktis dan ekonomis untuk digunakan. Namun, dalam menggunakan sepeda motor, aspek ergonomi dan kenyamanan bagi pengendara perlu untuk diperhatikan. Desain dan ukuran tempat duduk sepeda motor yang tidak sesuai dengan antropometri duduk statis pengendara dapat menimbulkan kelelahan pada pengendara dan mengakibatkan terjadinya kecelakaan. Tujuan dari penelitian ini adalah untuk mengetahui risiko ergonomi dari ketidaksesuaian antara desain dan ukuran tempat duduk sepeda motor dengan antropometri duduk statis. Untuk menganalisis risiko ergonomi, dilakukan penelitian …

Lama Merokok Dan Jumlah Konsumsi Rokok Terhadap Trombosit Pada Laki-Laki Perokok Aktif, Rini Sundari, Dinyar Supiadi Widjaya, Aditya Nugraha

Kesmas

Jumlah perokok dan jumlah rokok yang dikonsumsi mengalami peningkatan dari waktu ke waktu. Rokok dapat memengaruhi trombosit yang dapat menyebabkan gangguan kardiovaskular. Penelitian ini merupakan penelitian potong lintang yang bertujuan untuk menganalisis lama merokok dan jumlah rokok yang dikonsumsi terhadap jumlah trombosit, mean platelet volume (MPV), platelet distribution width (PDW), platelet crit (PCT), dan platelet large cell ratio (PLCR). Penelitian dilakukan di Pabrik Garmen Cimahi pada tahun 2014 yang diikuti oleh 31 laki-laki perokok aktif berusia 19 - 50 (32,97 + 10,28) tahun, 70,9% di antaranya sebagai perokok sedang. Analisis data dilakukan secara deskriptif, uji normalitas Shapiro-Wilk, dan uji korelasi …

Kejadian Anemia Pada Siswa Sekolah Dasar, Saifuddin Sirajuddin, Masni Masni

Kesmas

Anemia gizi besi masih merupakan masalah kesehatan masyarakat dengan prevalensi pada anak 5 - 12 tahun sebesar 29% di Indonesia dan di Kota Makassar sebesar 37,6%. Penelitian ini bertujuan untuk mengetahui faktor determinan (status kecacingan, status seng, kebiasaan sarapan pagi, pola konsumsi makanan sumber heme dan nonheme, pola konsumsi sumber makanan pelancar dan penghambat zat besi) terhadap kejadian anemia. Desain penelitian yang digunakan adalah potong lintang yang dilaksanakan pada bulan April – Juni 2014. Penelitian ini menggunakan desain potong lintang yang dilaksanakan pada siswa kelas 3 - 5 SD Negeri Cambaya Kecamatan Ujung Tanah Kota Makassar. Sampel sebanyak 120 siswa …

Tumor Necrosis Factor-Α Sebagai Prediktor Terjadinya Anemia Pada Ibu Hamil Di Wilayah Endemis Malaria, Rostika Flora, Mukni Mukni, Bina Melvia Girsang, Sigit Purwanto

Kesmas

Ibu hamil yang berada di daerah endemis malaria sangat rentan terhadap infeksi malaria selama kehamilan. Gejala malaria pada kelompok ini sering asimptomatik atau bahkan tidak terdeteksi sama sekali karena adanya efek imunitas protektif melalui infeksi yang berulang. Adanya peningkatan kadar tumor necrosis factor-alpha (TNF-α) dapat dijadikan indikator terjadinya infeksi malaria. TNF-α berperan penting dalam respons imun pada malaria akut yang menghambat terjadinya eritropoesis. Penelitian ini bertujuan untuk mengetahui hubungan antara kadar TNF-α dengan kejadian anemia pada ibu hamil didaerah endemik malaria vivax. Penelitian ini menggunakan desain potong lintang, dilakukan pada bulan Januari - Februari 2014 di lima wilayah kerja puskesmas …

Slides: Practicing Sustainability In Natural Resource Industries, Gary D. Libecap

Natural Resource Industries and the Sustainability Challenge (Martz Winter Symposium, February 27-28)

Presenter: Gary D. Libecap, Bren School of Environmental Science and Management and Economics Department, University of California, Santa Barbara, National Bureau of Economic Research (NBER)

10 slides

Electrochemical Monitoring Of Cell Wall-Regulated Transient Extracellular Oxidative Burst From Single Plant Cells, Jun-Tao Liu, Yan-Ling Liu, Zhi Cheng, Shi-Jing Chen, Wei-Hua Huang

Journal of Electrochemistry

Oxidative burst by rapid, transient generation of reactive oxygen species (ROS) is a fundamental process for plant disease defense and signal transduction. ROS can be protective or toxic depending on their concentrations, and critical balance between ROS production and scavenging is regulated by complex and perfect mechanisms in plant cells. However, the process of rapid and transient ROS burst from plant cells and their regulatory mechanisms are far from being completely understood, owing to the methodological obstacles in real-time monitoring such a fast process. In this work, we showed the application of microelectrode electrochemistry with high spatiotemporal resolution to monitor …

A Multi-Channel Electrochemical Immunosensing System With Polyhrp-Based Signal Amplification For The Detection Of Tumor Markers, Wang-Ping Deng, Yan-Zhi Dou, Jing Su, Lin Hao, Shi-Ping Song, Chun-Hai Fan

Journal of Electrochemistry

We have developed a multi-channel electrochemical immunosensing system for the detection of α-fetoprotein (AFP). The sensing system consisted of carbon screen-printed electrode (SPCE) arrays and polyHRP-based signal amplification probes. AFP antigens could bind to both capture antibodies immobilized on electrode arrays ant detection antibodies (anti-AFP IgG developed in rabbit). The anti-rabbit IgG conjugated to poly-horseradish peroxidase were used as a signaling probe to bind to the immuno-complex. The current signals were harvested by a home-made multi-channels electrochemical detector. AFP could be detected in the concentration ranges of 64 pg·mL^-1 ~ 250 ng·mL^-1. The detection limit was as …

Novel Dna Electrochemical Biosensor For K-Ras Point Mutation Detection Based On Dna Polymerase I, Li-Qing Lin, Cheng-Fei Zhao, Zhou-Qian Jiang, Shao-Huang Weng, Xiao-Lan Xie, Xin-Hua Lin

Journal of Electrochemistry

In this article, we developed a novel DNA electrochemical sensor for obtaining a current-time curve based on DNA polymerase I. The capture probes were fixed on the Au electrode by Au interacting with -SH, and then hybridized with the K-ras mutant target DNA as far as one base before the mutation site. After hybridizing the K-ras mutant or wild target DNA, the resulting assembly reacted with the dUTP-biotin in the presence of DNA polymerase I. Then avidin-HRP combined the dUTP-biotin on the electrode. The proposed electrode was applied for detection in TMB solution by electrochemical technology. The experimental results showed …

An Enzymatic Ethanol/O2 Biofuel Cell Powered By Commercial Vodka Fuel, Yi-Ming Yan, Lan-Qun Mao

Journal of Electrochemistry

This study demonstrates the performance of a new type alcohol/O₂ biofuel cell assembled by using alcohol dehydrogenase (ADH) and bilirubin oxidase (BOD) as the biocatalysts of the bioanode and the biocathode for the bioelectrocatalytic oxidation of alcohol and reduction of oxygen, respectively. To construct the bioanode and the biocathode, single-walled carbon nanotubes (SWCNTs) were used. In the bioanode, SWCNTs were used as the supporting materials for both methylene green (MG) which was used as the electrocatalyst for the oxidation of NADH and ADH. The as-constructed MG/ADH/SWCNTs-based bioanode exhibits a good activity toward the bioelectrocatalytic oxidation of ethanol. In the …