211 research outputs found

    Congruences for Taylor expansions of quantum modular forms

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    Recently, a beautiful paper of Andrews and Sellers has established linear congruences for the Fishburn numbers modulo an infinite set of primes. Since then, a number of authors have proven refined results, for example, extending all of these congruences to arbitrary powers of the primes involved. Here, we take a different perspective and explain the general theory of such congruences in the context of an important class of quantum modular forms. As one example, we obtain an infinite series of combinatorial sequences connected to the "half-derivatives" of the Andrews-Gordon functions and with Kashaev's invariant on (2m+1,2)(2m+1,2) torus knots, and we prove conditions under which the sequences satisfy linear congruences modulo at least 50%50\% of primes of primes

    Interior Fourier Near-Field Acoustical Holography Using Energy Density

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    Near-field acoustical holography (NAH) is used to reconstruct three-dimensional acoustic fields from a two-dimensional planar measurement. During previous work at BYU, a method has been developed called energy-based near-field acoustical holography (ENAH), which reduced the number of needed measurements by 75%. Other recent advances have expanded the theory to interior spaces where multiple sources and/or reflections are present. This paper presents a new method for reconstructing interior acoustic parameters using Fourier NAH and a single plane of energy density measurements. Energy density is measured using a six-microphone array. First, the probe measurements are used to create a Hermite surface pressure interpolation on two separate planes. These two planes are used to approximate the normal particle velocity as well as to separate the incoming and outgoing waves using the spatial Fourier-transform method. Once separated, traditional Fourier NAH is used to reconstruct the pressure and normal particle velocity at any point in space. Analytical and experimental results are shown and compared to exterior Fourier NAH approximations. Other drawbacks and benefits are discussed

    Split Nitrogen Application Trial

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    Farmers understand it is best to apply nitrogen to the crop at or right before rapid growth occurs. However, 100 percent in-season nitrogen applications are faulted because of potential for unfavorable weather conditions delaying applications and subsequent crop nitrogen deficiency occurring. This trial looks at how split nitrogen applications can be used to address environmental risks of pre-plant nitrogen application as well as unfavorable application conditions in-season

    No-tillage, Strip-tillage, and Chisel Plow Tillage Trial

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    Farmers in central and north central Iowa are often criticized for low adoption of no-tillage systems. No-tillage is often faulted with cooler, wetter soils and subsequently reduced yields. An alternative to conventional tillage and no-tillage systems is strip-tillage where the benefits of both are combine

    Glyphosate, Manganese, and Zinc Soybean Trial

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    Often there is yellowing of soybeans following glyphosate applications that have been attributed by some as manganese or zinc deficiency. There have been varied reports of impacts of this ‘yellow flash’ on soybean yields. Thistrial was conducted to investigate such claims

    The Effect of Tourniquet Use and Sterile CO2 Gas Bone Preparation on Cement Penetration in Primary Total Knee Arthroplasty

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    Introduction Tourniquetless total knee arthroplasty (TKA) is experiencing resurgence in popularity due to potential pain control benefits. Further, optimal cement technique and implant fixation remain paramount to long-term cemented TKA success, as aseptic loosening continues to be a leading cause of revision. The purpose of this study was to determine how tourniquet use and/or novel bone preparation using sterile, compressed carbon dioxide (CO2) gas affected cement penetration in TKA. Methods A retrospective review was performed on 303 consecutive primary TKAs with the same implant in three groups: (1) a tourniquet without sterile CO2 compressed gas used for bone preparation, (2) no tourniquet with CO2 gas, and (3) tourniquet use and CO2 gas bone preparation. Cement penetration was measured on radiographs by two independent, blinded raters across seven zones defined by the Knee Society Radiographic Evaluation System. Results The three groups did not differ on age, BMI, or sex (p≥0.1). Cement penetration was greater in six of seven zones with significantly greater cement penetration in three zones (Tibial AP Zone 2, Femoral Lateral Zones 3A and 3P) in groups that utilized CO2 gas bone preparation compared to the tourniquet only group (p≤0.039). Conclusion Bone prepared with CO2 gas showed significantly more cement penetration in three zones with greater cancellous bone. The results suggest use of CO2 gas bone preparation may achieve greater cement penetration than using a tourniquet with lavage only

    Exile Vol. XXXIV No. 1

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    Rock by Cam Martin (cover) New Arrival by Kent Lambert 3 Le Sacre Du Printemps by David Zivan 4 Nightscape by Cam Martin 5 A Cry For Life by Kent Lambert 7-8 Untitled by Grant Young 9 Crazy Circle by Melissa Wellington 10 Untitled by Shelley Dickerson 13 *The Tall Boy by Lauren Williams 15-19 *Untitled by Shelley Dickerson 21 Our Native Images by Cam Martin 23-38 Untitled by Lauran Hannan 39 Psych 100 by David Zivan 41 Routine by Lauren Williams 42-47 Untitled by Shelley Dickerson 49 A Man\u27s Descent to Hell, by Chris Rynd 51-53 Separation by David Zivan 54 Boat by Cynthia Hoag 55 Passage by Rosemary Walsh 57 Whales by Zachary Smith 58 Untitled by Lauren Hannan 59 Contributor Notes 61 Editorial decision is shared equally amoung [sic] the Editorial Board members. - title page * indicates contest winner -2 NOTE: The poem Crazy Circle by Melissa Wellington is listed as page 10 in the published table of contents but actually appears on page 11

    Exile Vol. XXXIII No. 2

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    POETRY Seams by Jennie Dawes 7 The Milky Blue Water by Mark Livengood 8-9 Patchwork by Mark Livengood 10 Belle Epoque by Karen J. Hall 21 Ballad by Zachary Smith 22-23 My Grandmother\u27s House by Karen J. Hall 24 Ghost by Jennie Dawes 27 What\u27s for Dessert? by Jennifer H. Miller 28 Dreams by Kent Lambert 31 Postmarked Fort Hill by Jennifer H. Miller 32 FICTION A Fostoria Tale by Debra Benko 13-18 The Pile by Jeff Montgomery 35-40 ARTWORK untitled by Lauren Kronish (cover) Standing by Heidi Rubin 3 Home, Part I by Heidi Rubin 4 Untitled by Dan Kirk 19 Infra-red (untitled) by Woody Woodroof 26 Florence, Italy (untitled) by Eliza Brown 29 Mwanafunzi by David Bloch 33 Joshua Tree by Susan McLain 41 CONTRIBUTOR\u27S NOTES 43 Editors share equally all editorial decisions. -2 NOTE: the artwork Home, Part I by Heidi Rubin does not appear to have been published, although it is listed in the table of contents for this issue and so is included here

    Analysis of phosphatases in ER-negative breast cancers identifies DUSP4 as a critical regulator of growth and invasion.

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    Estrogen receptor (ER)-negative cancers have a poor prognosis, and few targeted therapies are available for their treatment. Our previous analyses have identified potential kinase targets critical for the growth of ER-negative, progesterone receptor (PR)-negative and HER2-negative, or "triple-negative" breast cancer (TNBC). Because phosphatases regulate the function of kinase signaling pathways, in this study, we investigated whether phosphatases are also differentially expressed in ER-negative compared to those in ER-positive breast cancers. We compared RNA expression in 98 human breast cancers (56 ER-positive and 42 ER-negative) to identify phosphatases differentially expressed in ER-negative compared to those in ER-positive breast cancers. We then examined the effects of one selected phosphatase, dual specificity phosphatase 4 (DUSP4), on proliferation, cell growth, migration and invasion, and on signaling pathways using protein microarray analyses of 172 proteins, including phosphoproteins. We identified 48 phosphatase genes are significantly differentially expressed in ER-negative compared to those in ER-positive breast tumors. We discovered that 31 phosphatases were more highly expressed, while 11 were underexpressed specifically in ER-negative breast cancers. The DUSP4 gene is underexpressed in ER-negative breast cancer and is deleted in approximately 50 % of breast cancers. Induced DUSP4 expression suppresses both in vitro and in vivo growths of breast cancer cells. Our studies show that induced DUSP4 expression blocks the cell cycle at the G1/S checkpoint; inhibits ERK1/2, p38, JNK1, RB, and NFkB p65 phosphorylation; and inhibits invasiveness of TNBC cells. These results suggest that that DUSP4 is a critical regulator of the growth and invasion of triple-negative breast cancer cells
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