211 research outputs found
Congruences for Taylor expansions of quantum modular forms
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 torus knots, and we prove conditions under which the sequences
satisfy linear congruences modulo at least of primes of primes
Interior Fourier Near-Field Acoustical Holography Using Energy Density
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
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
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
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
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
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
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.
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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