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2008

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First Report Of Soybean Rust Caused By Phakopsora Pachyrhizi In Nebraska, S. R. Watson, L. J. Giesler, A. D. Ziems, T. E. Brovont Nov 2008

First Report Of Soybean Rust Caused By Phakopsora Pachyrhizi In Nebraska, S. R. Watson, L. J. Giesler, A. D. Ziems, T. E. Brovont

Department of Plant Pathology: Faculty Publications

Soybean rust caused by Phakopsora pachyrhizi Sydow was first observed in the continental United States in Louisiana in November 2004 (2). As part of the national soybean rust monitoring effort, samples were collected on 3 October 2007 during the scouting of fields with green leaves in southeastern Nebraska. After incubation at room temperature for 24 h, uredinea and urediniospores were observed with microscopic examination. Urediniospores were obovoid, hyaline to pale brown, and measured 20 to 30 × 18 to 20 μm.

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Living Perilously In A Bubble, Leonard Wong Dr. Nov 2008

Living Perilously In A Bubble, Leonard Wong Dr.

Articles & Editorials

Each month a member of the SSI faculty writes an editorial for our monthly newsletter. This is the Op-Ed for the November 2008 newsletter.

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Technical Variables In High-Throughput Mirna Expression Profiling: Much Work Remains To Be Done, Peter T. Nelson, Wang-Xia Wang, Bernard R. Wilfred, Guiliang Tang Nov 2008

Technical Variables In High-Throughput Mirna Expression Profiling: Much Work Remains To Be Done, Peter T. Nelson, Wang-Xia Wang, Bernard R. Wilfred, Guiliang Tang

Pathology and Laboratory Medicine Faculty Publications

MicroRNA (miRNA) gene expression profiling has provided important insights into plant and animal biology. However, there has not been ample published work about pitfalls associated with technical parameters in miRNA gene expression profiling. One source of pertinent information about technical variables in gene expression profiling is the separate and more well-established literature regarding mRNA expression profiling. However, many aspects of miRNA biochemistry are unique. For example, the cellular processing and compartmentation of miRNAs, the differential stability of specific miRNAs, and aspects of global miRNA expression regulation require specific consideration. Additional possible sources of systematic bias in miRNA expression studies include …

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Nitric Oxide-Induced Bacteriostasis And Modification Of Iron-Sulphur Proteins In Escherichia Coli, Binbin Ren, Nianhui Zhang, Juanjuan Yang, Huangen Ding Nov 2008

Nitric Oxide-Induced Bacteriostasis And Modification Of Iron-Sulphur Proteins In Escherichia Coli, Binbin Ren, Nianhui Zhang, Juanjuan Yang, Huangen Ding

Faculty Publications

The nitric oxide (NO) cytotoxicity has been well documented in bacteria and mammalian cells. However, the underlying mechanism is still not fully understood. Here we report that transient NO exposure effectively inhibits cell growth of Escherichia coli in minimal medium under anaerobic growth conditions and that cell growth is restored when the NO-exposed cells are either supplemented with the branched-chain amino acids (BCAA) anaerobically or returned to aerobic growth conditions. The enzyme activity measurements show that dihydroxyacid dehydratase (IlvD), an iron-sulphur enzyme essential for the BCAA biosynthesis, is completely inactivated in cells by NO with the concomitant formation of the …

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Identification Of A Functionally Essential Amino Acid For Arabidopsis Cyclic Nucleotide Gated Ion Channels Using The Chimeric Atcngc11/12 Gene, Joyce Baxter, Wolfgang Moeder, William Urquhart, Dea Shahinas, Kimberley Chin, Dinesh Christendat, Hong Gu Kang, Magdalena Angelova, Naohiro Kato, Keiko Yoshioka Nov 2008

Identification Of A Functionally Essential Amino Acid For Arabidopsis Cyclic Nucleotide Gated Ion Channels Using The Chimeric Atcngc11/12 Gene, Joyce Baxter, Wolfgang Moeder, William Urquhart, Dea Shahinas, Kimberley Chin, Dinesh Christendat, Hong Gu Kang, Magdalena Angelova, Naohiro Kato, Keiko Yoshioka

Faculty Publications

We used the chimeric Arabidopsis cyclic nucleotide-gated ion channel AtCNGC11/12 to conduct a structure-function study of plant cyclic nucleotide-gated ion channels (CNGCs). AtCNGC11/12 induces multiple pathogen resistance responses in the Arabidopsis mutant constitutive expresser of PR genes 22 (cpr22). A genetic screen for mutants that suppress cpr22-conferred phenotypes identified an intragenic mutant, #73, which has a glutamate to lysine substitution (E519K) at the beginning of the eighth β-sheet of the cyclic nucleotide-binding domain in AtCNGC11/12. The #73 mutant is morphologically identical to wild-type plants and has lost cpr22-related phenotypes including spontaneous cell death and enhanced pathogen resistance. Heterologous expression analysis …

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Transcriptional Profiling Of Mature Arabidopsis Trichomes Reveals That Noeck Encodes The Mixta-Like Transcriptional Regulator Myb106, Marc J. Jakoby, Doris Falkenhan, Michael T. Mader, Ginger Brininstool, Elisabeth Wischnitzki, Nicole Platz, Andrew Hudson, Martin Hülskamp, John Larkin, Arp Schnittger Nov 2008

Transcriptional Profiling Of Mature Arabidopsis Trichomes Reveals That Noeck Encodes The Mixta-Like Transcriptional Regulator Myb106, Marc J. Jakoby, Doris Falkenhan, Michael T. Mader, Ginger Brininstool, Elisabeth Wischnitzki, Nicole Platz, Andrew Hudson, Martin Hülskamp, John Larkin, Arp Schnittger

Faculty Publications

Leaf hairs (trichomes) of Arabidopsis (Arabidopsis thaliana) have been extensively used as a model to address general questions in cell and developmental biology. Here, we lay the foundation for a systems-level understanding of the biology of this model cell type by performing genome-wide gene expression analyses. We have identified 3,231 genes that are up-regulated in mature trichomes relative to leaves without trichomes, and we compared wild-type trichomes with two mutants, glabra3 and triptychon, that affect trichome morphology and physiology in contrasting ways. We found that cell wall-related transcripts were particularly overrepresented in trichomes, consistent with their highly elaborated structure. In …

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Venture Capital And Sequential Investments, Dirk Bergemann, Ulrich Hege, Liang Peng Nov 2008

Venture Capital And Sequential Investments, Dirk Bergemann, Ulrich Hege, Liang Peng

Cowles Foundation Discussion Papers

We present a dynamic model of venture capital financing, described as a sequential investment problem with uncertain outcome. Each venture has a critical, but unknown threshold beyond which it cannot progress. If the threshold is reached before the completion of the project, then the project fails, otherwise it succeeds. The investors decide sequentially about the speed of the investment and the optimal path of staged investments. We derive the dynamically optimal funding policy in response to the arrival of information during the development of the venture. We develop three types of predictions from our theoretical model and test these predictions …

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Estimation And Model Selection Of Semiparametric Multivariate Survival Functions Under General Censorship, Xiaohong Chen, Yanqin Fan, Demian Pouzo, Zhiliang Ying Nov 2008

Estimation And Model Selection Of Semiparametric Multivariate Survival Functions Under General Censorship, Xiaohong Chen, Yanqin Fan, Demian Pouzo, Zhiliang Ying

Cowles Foundation Discussion Papers

Many models of semiparametric multivariate survival functions are characterized by nonparametric marginal survival functions and parametric copula functions, where different copulas imply different dependence structures. This paper considers estimation and model selection for these semiparametric multivariate survival functions, allowing for misspecified parametric copulas and data subject to general censoring. We first establish convergence of the two-step estimator of the copula parameter to the pseudo-true value defined as the value of the parameter that minimizes the KLIC between the parametric copula induced multivariate density and the unknown true density. We then derive its root–n asymptotically normal distribution and provide a simple …

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Motions 2008 Volume 44 Number 3, University Of San Diego School Of Law Student Bar Association Nov 2008

Motions 2008 Volume 44 Number 3, University Of San Diego School Of Law Student Bar Association

Newspaper, Motions (1987-2019)

No abstract provided.

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Regulation Of The Mouse Treacher Collins Syndrome Homolog (Tcof1) Promoter Through Differential Repression Of Constitutive Expression, Kathryn H. Shows, Rita Shiang Nov 2008

Regulation Of The Mouse Treacher Collins Syndrome Homolog (Tcof1) Promoter Through Differential Repression Of Constitutive Expression, Kathryn H. Shows, Rita Shiang

Biology & Environmental Sciences Faculty Publications

Treacher Collins syndrome is an autosomal-dominant mandibulofacial dysostosis caused by haploinsufficiency of the TCOF1 gene product treacle. Mouse Tcof1 protein is approximately 61% identical and 71% similar to treacle, and heterozygous knockout of Tcof1 causes craniofacial malformation. Tcof1 expression is high in developing neural crest, but much lower in other tissues. To investigate this dual regulation, highly conserved regions upstream of TCOF1 homologs were tested through deletion and mutation reporter assays, and conserved predicted transcription factor binding sites were assessed through chromatin binding studies. Assays were performed in mouse P19 embryonic carcinoma cells and in HEK293 cells to determine differential …

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God Seeks And Creates Community , Stephen P. Kristenson Nov 2008

God Seeks And Creates Community , Stephen P. Kristenson

Consensus

Historical series, 17. Sermon prepared for and made available to the congregations of the Synod of Alberta, presented at the festival of The Holy Trinity, 6 Je 2004. Prov 8:1-4; Ps 8; Rom 5:1-5; Jn 16:12-15.

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In Christ ... A Future With Hope , Allan A. Grundahl Nov 2008

In Christ ... A Future With Hope , Allan A. Grundahl

Consensus

Historical series, 18. Sermon preached at the opening service of the Saskatchewan Synod Convention, Swift Current, Saskatchewan, 4 Jl 2002. Jer 29:11-14; Rom 8:18-27; Jn 17:1-6, 17-26.

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Knowing The Context: Frames, Tools, And Signs For Preaching , David Schnasa Jacobsen Nov 2008

Knowing The Context: Frames, Tools, And Signs For Preaching , David Schnasa Jacobsen

Consensus

Author: Nieman, James Knowing the context viii, 93 p. Publisher: Minneapolis : Fortress Pr, 2008. Series: Elements of preaching.

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Apostle To The Conquered: Reimagining Paul's Mission , Oscar Cole-Arnal Nov 2008

Apostle To The Conquered: Reimagining Paul's Mission , Oscar Cole-Arnal

Consensus

Author: Lopez, Davina C Apostle to the conquered xx, 248 p. Publisher: Minneapolis : Fortress Pr, 2008. Series: Paul in critical contexts; Author: Elliott, Neil Arrogance of nations xv,223 p. Publisher: Minneapolis : Fortress Pr, 2008. Series: Paul in critical contexts.

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Foreword, Timothy Hegedus Nov 2008

Foreword, Timothy Hegedus

Consensus

No abstract provided.

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The Story Of Noah: Violent Exclusionary Apocaplytic Is (Not) Good To Think , F. V. Greifenhagen Nov 2008

The Story Of Noah: Violent Exclusionary Apocaplytic Is (Not) Good To Think , F. V. Greifenhagen

Consensus

Genesis 6-9; Festschrift in honour of Erwin Buck. Rev fr paper presented at the Waterloo Lutheran Seminary, 19 S 2007, Hope Lutheran Church in Calgary, and All Saints Anglican Church in Regina.

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The Sac Proposal For The Monetization Of The File Sharing Of Music In Canada: Does It Comply With Canada’S International Treaty Obligations Related To Copyright?, Barry Sookman Nov 2008

The Sac Proposal For The Monetization Of The File Sharing Of Music In Canada: Does It Comply With Canada’S International Treaty Obligations Related To Copyright?, Barry Sookman

Osgoode Hall Review of Law and Policy

In November 2007, the Songwriters Association of Canada (SAC) released a proposal for the monetization of the file sharing of music in Canada. This article attempts to determine whether or not Canada, given its international and bilateral treaty agreements, could ever adopt the SAC‘s proposal. The article approaches this analysis through the ―three-step test‖, which was adopted under the Berne Convention in 1971 and enshrined in the subsequent TRIPS Agreement and NAFTA; the article also analyzes whether or not the Proposal is compatible with Canada‘s obligations under the Rome Convention. The article concludes that, without amendments to the international treaties …

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Book Review: Remix: Making Art And Commerce Thrive In The Hybrid Economy By Lawrence Lessig, Catherine Lovrics Nov 2008

Book Review: Remix: Making Art And Commerce Thrive In The Hybrid Economy By Lawrence Lessig, Catherine Lovrics

Osgoode Hall Review of Law and Policy

No abstract provided.

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Facebook Fair For Copyright Of Canada: Replies To Professor Geist, Barry Sookman Nov 2008

Facebook Fair For Copyright Of Canada: Replies To Professor Geist, Barry Sookman

Osgoode Hall Review of Law and Policy

This article examines Professor Geist's reaction to Bill C-61 as manifested through his Facebook group "Facebook Fair for Copyright of Canada" and his blog. The author argues that Professor Geist's assessment of the Bill is unbalanced. In particular, he attempts to rebut eleven of the claims made by Professor Geist with the aim of mitigating any unwarranted adverse public opinion about the Bill that those claims may have engendered.

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Havre Community Survey, Christine Oschell Nov 2008

Havre Community Survey, Christine Oschell

Institute for Tourism and Recreation Research Publications

The purpose of this case study was to provide Havre community planners with an understanding of their visitors and the money spent by them in Havre, MT.

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Venture Capital And Sequential Investments, Dirk Bergemann, Ulrich Hege, Liang Peng Nov 2008

Venture Capital And Sequential Investments, Dirk Bergemann, Ulrich Hege, Liang Peng

Cowles Foundation Discussion Papers

We analyze sequential investment decisions in an innovative project that depend on the investor’s information about the project failure risk and its potential final value. We consider the feedback effects between learning about the project parameters and the continuous adjustment of the investment strategy. Investors decide sequentially about the speed of investment and the optimal degree of involvement. We develop three types of predictions from our theoretical model and test these predictions in a large sample of venture capital investment in the U.S. for the period of 1987-2002. First, the investment flow starts cautiously if the failure risk is high …

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Venture Capital And Sequential Investments, Dirk Bergemann, Ulrich Hege, Liang Peng Nov 2008

Venture Capital And Sequential Investments, Dirk Bergemann, Ulrich Hege, Liang Peng

Cowles Foundation Discussion Papers

We present a dynamic model of venture capital financing, described as a sequential investment problem with uncertain outcome. Each venture has a critical, but unknown threshold beyond which it cannot progress. If the threshold is reached before the completion of the project, then the project fails, otherwise it succeeds. The investors decide sequentially about the speed of the investment and the optimal path of staged investments. We derive the dynamically optimal funding policy in response to the arrival of information during the development of the venture. We develop three types of predictions from our theoretical model and test these predictions …

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Managing Strategic Buyers, Johannes Hörner, Larry Samuelson Nov 2008

Managing Strategic Buyers, Johannes Hörner, Larry Samuelson

Cowles Foundation Discussion Papers

We consider the problem of a monopolist who must sell her inventory before some deadline, facing n buyers with independent private values. The monopolist posts prices but has no commitment power. The seller faces a basic trade-off between imperfect price discrimination and maintaining an effective reserve price. When there is only one unit and only a few buyers, the seller essentially posts unacceptable prices up to the very end, at which point prices collapse in a series of jumps to a “reserve price” that exceeds marginal cost. When there are many buyers, the seller abandons this reserve price in order …

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Managing Strategic Buyers, Johannes Hörner, Larry Samuelson Nov 2008

Managing Strategic Buyers, Johannes Hörner, Larry Samuelson

Cowles Foundation Discussion Papers

We consider the problem of a monopolist with an object to sell before some deadline, facing n buyers with independent private values. The monopolist posts prices but has no commitment power. We show that the monopolist can always secure at least the larger of the static monopoly profit and the revenue from a Dutch auction with a zero reserve price. When there are only a few buyers, her profits are higher than this bound, and she essentially posts unacceptable prices up to the very end, at which point prices collapse to a “reservation price” that exceeds marginal cost. When there …

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Managing Gambel Oak In Southwestern Ponderosa Pine Forests: The Status Of Our Knowledge, Scott R. Abella Nov 2008

Managing Gambel Oak In Southwestern Ponderosa Pine Forests: The Status Of Our Knowledge, Scott R. Abella

Public Policy and Leadership Faculty Research

Gambel oak (Quercus gambelii) is a key deciduous species in southwestern ponderosa pine (Pinus ponderosa) forests and is important for wildlife habitat, soil processes, and human values. This report (1) summarizes Gambel oak’s biological characteristics and importance in ponderosa pine forests, (2) synthesizes literature on changes in tree densities and fire frequencies since Euro-American settlement in pine-oak forests, (3) suggests management prescriptions for accomplishing various oak management objectives (for example, increasing diameter growth or acorn production), and (4) provides an appendix containing 203 Gambel oak literature citations organized by subject. Nine studies that reconstructed Gambel oak density changes since settlement …

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Widowhood And The End Of Spousal Caregiving: Wear And Tear Or Relief?, Jennifer Reid Keene, Anastasia H. Prokos Nov 2008

Widowhood And The End Of Spousal Caregiving: Wear And Tear Or Relief?, Jennifer Reid Keene, Anastasia H. Prokos

Sociology Faculty Research

This paper analyses the impact of spousal care-giving on survivors’ depressive symptoms six months into widowhood, and examines the applicability of a ‘ relief model’ of spousal adjustment during bereavement. We examine several aspects of the care-giving situation, including care-giver stress, care-giving demands, and type and duration of care and how these affect survivors’ depressive symptomatology. The sample is drawn from two waves of the Changing Lives of Older Couples (CLOC) survey, which was conducted in the United States in the Detroit Metropolitan Area, Michigan. The first wave of data was collected from couples and the second from the surviving …

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Inside Unlv, Shane Bevell, Tony Allen, Karen Sharp, Mamie Peers, Cate Weeks Nov 2008

Inside Unlv, Shane Bevell, Tony Allen, Karen Sharp, Mamie Peers, Cate Weeks

Inside UNLV

No abstract provided.

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Site Response Zones And Short-Period Earthquake Ground Motion Projections For The Las Vegas Basin, Barbara Luke, Ying Liu Nov 2008

Site Response Zones And Short-Period Earthquake Ground Motion Projections For The Las Vegas Basin, Barbara Luke, Ying Liu

Civil and Environmental Engineering and Construction Faculty Research

A deterministic seismic hazard analysis was conducted to address the effect of local soil conditions on earthquake-induced strong ground motion in the Las Vegas Basin, Nevada (US). Using a large geological and geotechnical database, two response units were defined: a fine-grained unit, predominantly clay; and a coarse-grained unit, predominantly gravel. A moderate number of high-quality shallow shear wave velocity measurements were collected from which characteristic shear wave velocity profiles were developed for each response unit. An equivalent-linear one-dimensional site response model was used. The model was calibrated using a basin-wide, small-strain ground motion database. Calibration tests showed that ground motion …

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Characterizing Anomalous Ground For Engineering Applications Using Surface-Based Seismic Methods, Barbara Luke, Wanda Taylor, Carlos Calderon-Macias, Xiaohui Jin, Helena Murvosh, Jeff Wagoner Nov 2008

Characterizing Anomalous Ground For Engineering Applications Using Surface-Based Seismic Methods, Barbara Luke, Wanda Taylor, Carlos Calderon-Macias, Xiaohui Jin, Helena Murvosh, Jeff Wagoner

Civil and Environmental Engineering and Construction Faculty Research

Shallow seismics are in demand today in tectonically active regions to characterize and classify sites for earthquake response studies. The surface-based seismic methods are the most widely used for this purpose. In developed areas, the passive-source methods, also known as microtremor methods, are popular because of their efficiency and because the available frequency content is appropriate to determine an average shear-wave velocity for the upper 30 m. This information is required by the International Building Code, which is used by many municipalities in the US and elsewhere.

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Supply Curves For Rooftop Solar Pv-Generated Electricity For The United States, Paul Denholm, Robert Margolis Nov 2008

Supply Curves For Rooftop Solar Pv-Generated Electricity For The United States, Paul Denholm, Robert Margolis

Publications (E)

In this report, we examine several possible methods for generating PV supply curves based exclusively on rooftop deployment. We begin by introducing a framework methodology for a basic supply curve based on estimated distribution of population and buildings, rooftop availability and orientation, and geographical variation in resource. We then discuss limitations to this basic methodology and introduce alternative supply curves that consider additional factors – changes in PV efficiency and configuration, rooftop availability, and grid limitations – while emphasizing the data and methodological limitations to each approach. The resulting curves potentially could be used as inputs to other models or …

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