Digital Commons Network^™

Can Telomere Shortening Explain Sigmoidal Growth Curves?, Peter Olofsson

Mathematics Faculty Research

A general branching process model is proposed to describe the shortening of telomeres in eukaryotic chromosomes. The model is flexible and incorporates many special cases to be found in the literature. In particular, we show how telomere shortening can give rise to sigmoidal growth curves, an idea first expressed by Portugal et al. [A computational model for telomere-dependent cell-replicative aging, BioSystems 91 (2008), pp. 262–267]. We also demonstrate how other types of growth curves arise if telomere shortening is mitigated by other cellular processes. We compare our results with published data sets from the biological literature.

Increasing Returns To Marketing In Zambian Maize Markets, Gelson Tembo, Thomas S. Jayne

Zambia Social Science Journal

The article investigates the existence of market externalities due to increasing returns to marketing. Panel data on 198 pairs of maize markets in Zambia and correlated random effects linear and tobit estimators were used to model the relationship between market externalities and producer-to-wholesale marketing margins. This article is one of the first to explicitly account for unobserved local market heterogeneity in a developing country context. The results suggest that Zambian smallholder maize markets are substantially specialized with significant margin-reducing own externality effects and insignificant cross-externality effects. The results also indicate that the unobserved market effects exert a systematic influence on …

Cleanjava: A Formal Notation For Functional Program Verification, Yoonsik Cheon, Cesar Yeep, Melisa Vela

Departmental Technical Reports (CS)

Unlike a Hoare-style program verification, a functional program verification supports forward reasoning by viewing a program as a mathematical function from one program state to another and proving its correctness by essentially comparing two mathematical functions, the function computed by the program and its specification. Since it requires a minimal mathematical background and reflects the way programmers reason about the correctness of a program informally, it can be taught and practiced effectively. However, there is no formal notation supporting the functional program verification. In this paper, we propose a formal notation for writing functional program specifications for Java programs. The …

Power Vs. Performance Evaluation Of Synthetic Aperture Radar Image-Formation Algorithms And Implementations For Embedded Hec Environments (Ongoing Study), Ricardo Portillo, Sarala Arunagiri, Patricia J. Teller

Departmental Technical Reports (CS)

The continuing miniaturization and parallelization of processing hardware has facilitated the development of mobile and field-deployable systems that can accommodate terascale processing within once prohibitively small size and weight constraints. Unfortunately, the added computational capability of these small systems often comes at the cost of larger power demands, an already strained resource in these embedded systems. This study explores the power issues in a specific type of field-deployable system, Mobile Radar. Specifically, we focus on a computationally intensive phase of Synthetic Aperture Radar, Image Formation (IF), and evaluate performance tradeoffs in terms of time-to-solution, output image quality, and power consumption …

A New Answer To Pauli's Question: Almost All Quantum States Can Be Uniquely Determined By Measuring Location And Momentum, Don Jackson, Olga Kosheleva

Departmental Technical Reports (CS)

In classical mechanics, we can uniquely reconstruct the state of each particle by measuring its spatial location and momentum. In his 1958 paper, W. Pauli, one of the founders of quantum mechanics, conjectured that the same should be true in the quantum case as well: that every quantum state can be uniquely determined by measuring spatial location and momentum. This conjecture was disproven: there are pairs of physically different states that cannot be distinguished if we only measure special location and momentum. A natural question is: how frequent are such pairs? In this paper, we show that almost all quantum …

Teaching Research: Encouraging Discoveries, Francis E. Su

All HMC Faculty Publications and Research

What does it take to turn a learner into a discoverer? Or to turn a teacher into a co-adventurer? A handful of experiences—from teaching a middle-school math class to doing research with undergraduates—have changed the way that I would answer these questions. Some of the lessons I’ve learned have surprised me.

Ua35/1 Doers & Deeds Vol. 7, No. 17, Wku Provost

WKU Administration Documents

Newsletter created by the WKU Provost & Vice President of Academic Affairs to highlight the activities of faculty, staff and alumni.

Colloquy

Word Ways

Responses to articles in previous issues of Word Ways.

Magic In Six Dimensions, Jeremiah Farrell

Word Ways

A royal flush in poker consists of the ace, king, queen, jack and ten, all in the same suit. Our magic begins by having the spectator choose one of the cards in any of the four royal flushes. This choice could be by random draw or the spectator can merely think of one of the 20 cards. In either case he does not inform the magician of his choice but will write it on a slip of paper for future reference.

Acrostic Dictionary Of Wordplay Terms, A. Anil

Word Ways

A bunch of definitive reverse acrostics presented in February ('10-8) included seven wordplay terms, with especially fun ones for logology and logophile. I thought a rather immoderate list of wordplay terms similarly defined might be appreciated by logology fans. Read the definitions first. If they are not clear, then consult the examples, which are given as "answers" if needed.

A Clustering Comparison Measure Using Density Profiles And Its Application To The Discovery Of Alternate Clusterings, Eric Bae, James Bailey, Guozhu Dong

Kno.e.sis Publications

Data clustering is a fundamental and very popular method of data analysis. Its subjective nature, however, means that different clustering algorithms or different parameter settings can produce widely varying and sometimes conflicting results. This has led to the use of clustering comparison measures to quantify the degree of similarity between alternative clusterings. Existing measures, though, can be limited in their ability to assess similarity and sometimes generate unintuitive results. They also cannot be applied to compare clusterings which contain different data points, an activity which is important for scenarios such as data stream analysis. In this paper, we introduce a …

Influence Of Wall Vibrations On The Sound Of Brass Wind Instruments, Wilfried Kausel, Daniel W. Zietlow, Thomas R. Moore

Student-Faculty Collaborative Research Publications

The results of an experimental and theoretical investigation of the influence of wall vibrations on the sound of brass wind instruments are presented. Measurements of the transmission function and input impedance of a trumpet, with the bell both heavily damped and freely vibrating, are shown to be consistent with a theory that assumes that the internal pressure causes an oscillation of the diameter of the pipe enclosing the air column. These effects are shown to be most significant in sections where there are flaring walls, which explains why damping these vibrations in cylindrical pipes normally produces no measurable effects.

Cpa Client Bulletin, November 2010, American Institute Of Certified Public Accountants (Aicpa)

Newsletters

No abstract provided.

Geographic Factors Of Residential Burglaries - A Case Study In Nashville, Tennessee, Jonathan A. Hall

Masters Theses & Specialist Projects

This study examines geographic patterns and geographic factors of residential burglary at the Nashville, TN area for a twenty year period at five year interval starting in 1988. The purpose of this study is to identify what geographic factors have impacted on residential burglary rates, and if there were changes in the geographic patterns of residential burglary over the study period. Several criminological theories guide this study, with the most prominent being Social Disorganization Theory and Routine Activities Theory. Both of these theories focus on the relationships of place and crime. A number of spatial analysis methods are hence adopted …

The Statesman, V. 54, I. 10, Stony Brook University

Stony Brook Statesman-Sucolian

v. 54, i. 10

Uup Insight | V.29, Pamela. Wolfskill, United University Professions

UUP Insight

Newsletter of the Stony Brook Chapter of the United University Professions | v. : ill. ; 28 cm (original analog pub.),UUP Professional Perspective | Insight | UUP Newsletter | UUP/SB Newsletter

Creation Of A Revised Site Specific Liquefaction Potential Map Utilizing Geographic Information Systems (Gis) Technology And Arcgis® Software, Michael S. Armstrong

Earth and Soil Sciences

No abstract provided.

Correspondences Of Hypersurfaces In Hyperbolic Poincaré Manifolds And Conformally Invariant Pdes, Vincent Bonini, José M. Espinar, Jie Qing

Mathematics

On a hyperbolic Poincaré manifold, we derive an explicit relationship between the eigenvalues of Weyl-Schouten tensor of a conformal representative of the conformal infinity and the principal curvatures of the level sets of the associated geodesic defining function. This considerably simplifies the arguments and generalizes the results of Gálvez, Mira and the second author. In particular, we obtain the equivalence between Christoffel-type problems for hypersurfaces in a hyperbolic Poincar´e manifold and scalar curvature problems on the conformal infinity.

The Lick Agn Monitoring Project: Alternate Routes To A Broad-Line Region Radius, Jenny E. Greene, Carol E. Hood, Aaron J. Barth, Vardha N. Bennert, Misty C. Benz, Alexei V. Filippenko, Elinor Gates, Matthew A. Malkan, Tommaso Treu, Jonelle L. Walsh, Jong-Hak Woo

Physics

It is now possible to estimate black hole (BH) masses across cosmic time, using broad emission lines in active galaxies. This technique informs our views of how galaxies and their central BHs coevolve. Unfortunately, there are many outstanding uncertainties associated with these "virial" mass estimates. One of these comes from using the accretion luminosity to infer a size for the broad-line region (BLR). Incorporating the new sample of low-luminosity active galaxies from our recent monitoring campaign at Lick Observatory, we recalibrate the radius-luminosity relation with tracers of the accretion luminosity other than the optical continuum. We find that the radius …

Public Comprehension Of Published Data - Technology To The Rescue?, Paul Lorton Jr

Business Analytics and Information Systems

There is a need for the public to monitor the efficacy of what the public funds. This certainly was the view in 1989 when the voters of California passed Proposition 98 – the Classroom Instructional Improvement and Accountability Act.

Since the passage of Proposition 98, every public K-12 school in California has published and distributed a School Accountability Report Card (SARC) as hard copy sent home to the parents and, as the revised law compelled, made available on the internet.

Did the use of this technology (i.e., the internet and the infrastructure it requires) realize its purpose – to inform? …

Tuning The Morphology Of Au/Cds Nanocomposites Through Temperature-Controlled Reduction Of Gold-Oleate Complexes, Elena Khon, Nishshanka N. Hewa-Kasakarage, Ian Nemitz, Krishna Acharya, Mikhail Zamkov

Physics and Astronomy Faculty Publications

A general synthetic strategy for controlling the shape of gold domains grown onto CdS semiconductor nanocrystals is presented. The colloidal growth of Au nanoparticles is based on the temperature-controlled reduction of Au-oleate complexes on the surface of CdS and allows for precise tuning of nanoparticle diameters from 2.5 to 16 nm simply by adjusting the temperature of the growth solution, whereas the shape of Au/CdS nanocomposites can be controllably switched between matchsticks and barbells via the reaction rate. Depending on the exact morphology of Au and CdS domains, fabricated nanocomposites can undergo evaporation-induced self-assembly on a substrate either through end-to-end …

Engineering Flow States With Localized Forcing In A Thin, Marangoni-Driven Inclined Film, Rachel Levy, Stephen Rosenthal '09, Jeffrey Wong '11

All HMC Faculty Publications and Research

Numerical simulations of lubrication models provide clues for experimentalists about the development of wave structures in thin liquid films. We analyze numerical simulations of a lubrication model for an inclined thin liquid film modified by Marangoni forces due to a thermal gradient and additional localized forcing heating the substrate. Numerical results can be explained through connections to theory for hyperbolic conservation laws predicting wave fronts from Marangoni-driven thin films without forcing. We demonstrate how a variety of forcing profiles, such as Gaussian, rectangular, and triangular, affect the formation of downstream transient structures, including an N wave not commonly discussed in …

Linear Optimal Control Of Wind Turbines In Region Iii, Aliakbar Dabbaghmanesh

Mechanical Engineering Master's Theses

No abstract provided.

Columbia Chronicle (11/01/2010), Columbia College Chicago

Columbia Chronicle

Student newspaper from November 1, 2010 entitled The Columbia Chronicle. This issue is 40 pages and is listed as Volume 46, Number 9. Cover story: "Part-time faculty seeks new leadership" Editor-in-Chief: Spencer Roush

Chloroquine Susceptibility And Reversibility In A Plasmodium Falciparum Genetic Cross, Jigar J. Patel, Drew Thacker, Jon C. Tan, Perri Pleeter, Lisa Checkley, Joseph M. Gonzales, Bingbing Deng, Paul D. Roepe, Roland A. Cooper, Michael T. Ferdig

Collected Faculty Scholarship

Mutations in the Plasmodium falciparum chloroquine (CQ) resistance transporter (PfCRT), are major determinants of verapamil (VP)-reversible CQ resistance (CQR). In the presence of mutant PfCRT, additional genes contribute to the wide range of CQ susceptibilities observed. It is not known if these genes influence mechanisms of chemosensitization by CQR reversal agents. Using quantitative trait locus (QTL) mapping of progeny clones from the HB3 × Dd2 cross, we show that the P. falciparum multidrug resistance gene 1 (pfmdr1) interacts with the Southeast Asiaderived mutant pfcrt haplotype to modulate CQR levels. A novel chromosome 7 locus is predicted to contribute with the …

Enhancing Use Case Points Estimation Method Using Soft Computing Techniques, Ali Bou Nassif, Luiz Fernando Capretz, Nfa-Estimation

Electrical and Computer Engineering Publications

Software estimation is a crucial task in software engineering. Software estimation encompasses cost, effort, schedule, and size. The importance of software estimation becomes critical in the early stages of the software life cycle when the details of software have not been revealed yet. Several commercial and non-commercial tools exist to estimate software in the early stages. Most software effort estimation methods require software size as one of the important metric inputs and consequently, software size estimation in the early stages becomes essential. One of the approaches that has been used for about two decades in the early size and effort …

Ringel-Hall Algebras And Two-Parameter Quantized Enveloping Algebras, Xin Tang

College of Health, Science, and Technology

Let g be a finite-dimensional complex simple Lie algebra and 3 be the finite dimensional hereditary algebra associated to g. Let U+r,s (g) (respectively U? 0r,s (g) denote the two-parameter quantized enveloping algebra of the positive maximal nilpotent (respectively Borel) Lie subalgebra of g. We study the two-parameter quantized enveloping algebras U+r,s (g) and U? 0r,s (g) using the approach of Ringel-Hall algebras. First of all, we show that U+r,s (g) is isomorphic to a certain two-parameter twisted Ringel-Hall algebra Hr,s (?), which generalizes a result of Reineke. Based on detailed computations in Hr,s (?), we show that Hr,s (?) …

Spr Bulletin, Spring 2010, Uno Office Of Research And Creative Activity

Sponsored Programs Bulletins

This bulletin features Recent Grant Recipients and SPR Welcomes Dr. Scott Snyder as the new Associate Vice Chancellor for Research and Creative Activity!

Comparison Of Classical Analytic Hierarchy Process (Ahp) Approach And Fuzzy Ahp Approach In Multiple-Criteria Decision Making For Commercial Vehicle Information Systems And Networks (Cvisn) Project, Liyuan Zhang

Department of Industrial and Management Systems Engineering: Dissertations, Theses, and Student Research

Radio Frequency Identification (RFID) has emerged as an important technology with many possible applications in a wide variety of fields. It is said that RFID can perform well in transportation system. Nebraska Department of Motor Vehicles (NEDMV) is using this technique to perform an analysis on utilizing RFID license plates to assist with Commercial Vehicle Information Systems and Networks (CVISN) program with the cooperation of many other stakeholders. Previous House of Quality (HOQ) analysis evaluates stakeholders’ needs and provides the pairwise comparison values of six important technical requirements for each stakeholder. Based on these, this research aims to seek for …

Teaching Goals Of Interpreter Educators, Stephen Fitzmaurice

Publications

Angelo & Cross (1993) found substantial differences in the teaching goals of faculty from different disciplines, yet they found no differences for educators based on their employment status or the type of institution in which they worked. The current quantitative study compared the teaching goals of interpreter educators with those of educators from other disciplines. Respondents were asked to rate the importance of 52 goal statements from Angelo & Cross’ Teaching Goal Inventory (TGI) in terms of what they aim to have students accomplish in their courses. The data suggest that interpreter education constitutes a separate discipline from the nine …