Standardizing design performance comparison in microfluidic manufacturing

Microfluidic devices published in literature today lack sufficient information for automating the physical design process. Moreover, the constantly changing landscape of manufacturing and technological requirements poses a large problem in the physical design automation space. In this talk, we discuss some of the methodologies and standards formulated by CIDAR at BU and CARES at UC Riverside that allow not only allow the researchers in the physical design automation space to share and compare their results but also provide means for capturing the Specify, Design and Build lifecycle in microfluidic design

Teacher Perceptions of Collective Faculty Trust in Charter Schools and Traditional Public Schools

Research dedicated to understanding the effects of charter schools on student outcomes has yielded mixed results. Some findings indicate increased levels of student achievement in charter schools as compared with traditional public schools and some findings indicate lower levels of student achievement in charter schools as compared to traditional public schools. What is not known is teacher perceptions of cultural conditions in charter schools that could potentially influence student outcomes. This exploratory study compared teacher perceptions of collective faculty trust in the charter school where they are currently teaching and their perceptions of collective faculty trust based on previous teaching experience in traditional public schools. Paired samples t-tests were conducted to compare the means of each paired sample. Findings included statistical significance (2-tailed) at .000 for all four paired samples that were analyzed. These findings support the hypotheses that teachers who have taught in both charter schools and traditional public schools perceive higher overall collective faculty trust in charter schools and that perceptions of collective faculty trust of the principal, colleagues and clients is also higher in charter schools than in traditional public schools where they have taught. These findings may provide a foundation for further research investigating why some charter schools are successful and others are not. Additionally, the study may guide policy makers, law makers, and state department officials as they contemplate charter school expansion.Education (all programs

Monolithic integration of crystalline oxides on silicon and germanium using atomic layer deposition

textInside your microelectronic devices there are up to a billion transistors working in flawless operation. Silicon has been the workhorse semiconductor used for the transistor; however, there must be a transition to materials other than silicon, such as germanium, with future device sizes. In addition, new dielectric oxide materials are needed. My research has examined a type of crystalline oxide, known as a perovskite, which is selected for its ability to bond chemically to Si and Ge, and eliminate the electrical defects that affect performance. Many perovskite oxides are lattice-matched to the Si (001) and Ge (001) surface spacing, enabling heteroepitaxy. To date, the majority of research on crystalline oxides integrated with semiconductors has been based on strontium titanate, SrTiO3, epitaxially grown on Si (001) by molecular beam epitaxy. Alternative low-temperature growth methods, such as atomic layer deposition (ALD), offer both practical and economic benefits for the integration of crystalline oxides on semiconductors. My initial research informed the broader community that four unit cells (~1.5 nm) of SrTiO3 are required to enable heteroepitaxy on Si. The research has also shown that heteroepitaxial layers can be monolithically integrated with Si (001) without the formation of a SiOx interlayer between the Si (001) surface and the SrTiO3 layer because ALD is performed at lower temperatures than are typical for MBE. Thus, a combined MBE-ALD growth technique creates possible advantages in device designs that require the crystalline oxide to be in contact with the Si (001) surface. In recent work, I have demonstrated a method for integrating crystalline oxides directly on Ge by ALD. Germanium is being explored as an alternative channel material due to its higher hole and electron mobilities than Si, potentially enabling device operation at higher speed. This all-chemical growth process is expected to be scalable, is inherently less costly from a manufacturing cost of ownership, and is based on current manufacturing tool infrastructure. The impact of my research will be in continued scaling of device dimensions with novel materials that will provide faster speed and lower power consumption for microelectronic devices.Chemical Engineerin

Biogeography of Arkansas Mammals with Notes on Species of Questionable Status

Seventy-one native or re-introduced species of mammals were analyzed with respect to their geographical distributions and relationships to the four broad physiographical regions of Arkansas. Mammalian diversity in the Ozark Mountains, Ouachita Mountains/ Arkansas River Valley, Gulf Coastal Plain, and Mississippi Alluvial Plain/Crowley\u27s Ridge was not area dependent. The majority of mammalian species (44) occurs statewide with the greatest diversity in the interior highland regions. The Ozark Mountains contain the most species endemic to an area. Thirteen species which are of questionable status in Arkansas are discussed. The presence of the plains pocket gopher (Geomys bursarius), a second species of pocket gopher in Arkansas, is noted. New distributional maps for the desert shrew (Notiosorex crawfordi) and small-footed bat (Myotisleibii)are presented

Cr:ZnSe laser incorporating anti-reflection microstructures exhibiting low-loss, damage-resistant lasing at near quantum limit efficiency

We report demonstration of efficient continuous-wave lasing from chromium-doped zinc selenide using anti-reflection microstructures (ARMs) in place of thin-film AR coatings or Brewster angle cavity geometries. ARM textures are more resistant to laser-induced damage than coatings, exhibit low-loss, wide angular acceptance, broad wavelength effectiveness, and are not susceptible to water absorption. Slope-efficiencies of 68% were achieved, which compares favorably to the thin-film control samples at 58% for the same cavity. ARMs hold promise for near-term power scaling and wavelength agility of transition-metal-ion doped II-VI lasers

Terrestrial species adapted to sea dispersal: Differences in propagule dispersal of two Caribbean mangroves

A central goal of comparative phylogeography is to understand how species‐specific traits interact with geomorphological history to govern the geographic distribution of genetic variation within species. One key biotic trait with an immense impact on the spatial patterns of intraspecific genetic differentiation is dispersal. Here, we quantify how species‐specific traits directly related to dispersal affect genetic variation in terrestrial organisms with adaptations for dispersal by sea, not land—the mangroves of the Caribbean. We investigate the phylogeography of white mangroves (Laguncularia racemosa, Combretaceae) and red mangroves (Rhizophora mangle, Rhizophoraceae) using chloroplast genomes and nuclear markers (thousands of RAD‐Seq loci) from individuals throughout the Caribbean. Both coastal tree species have viviparous propagules that can float in salt water for months, meaning they are capable of dispersing long distances. Spatially explicit tests of the role of ocean currents on patterning genetic diversity revealed that ocean currents act as a mechanism for facilitating dispersal, but other means of moving genetic material are also important. We measured pollen‐ vs. propagule‐mediated gene flow and discovered that in white mangroves, seeds were more important for promoting genetic connectivity between populations, but in red mangroves, the opposite was true: pollen contributed more. This result challenges our concept of the importance of both proximity to ocean currents for moving mangrove seeds and the extent of long‐distance pollen dispersal. This study also highlights the importance of spatially explicit quantification of both abiotic (ocean currents) and biotic (dispersal) factors contributing to gene flow to understand fully the phylogeographic histories of species.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/146564/1/mec14894-sup-0003-FigS3.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/146564/2/mec14894-sup-0001-FigS1.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/146564/3/mec14894_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/146564/4/mec14894.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/146564/5/mec14894-sup-0002-FigS2.pd

Patients With Generalized Joint Hypermobility Have Thinner Superior Hip Capsules and Greater Hip Internal Rotation on Physical Examination

PURPOSE: To compare preoperative hip range of motion (ROM), hip capsular thickness on magnetic resonance imaging (MRI), and bony morphology on radiographs and computed tomography (CT) between patients with and without joint hypermobility as measured by the Beighton Test score (BTS), with subanalysis based on sex and age. METHODS: Consecutive patients who underwent hip arthroscopy for a diagnosis of femoroacetabular impingement syndrome with or without dysplasia were retrospectively reviewed. Patient BTS, hip ROM, demographics, surgical data, morphologic measures on radiographs and CT, and MRI findings including hip capsule thickness at various locations were compiled. Multiple statistical tests were performed, including multivariable linear or logistic regression models, while controlling for BTS, age, and sex. RESULTS: In total, 99 patients were included with a mean age of 29 ± 9.9 years; 62 (62.6%), were female. Forty patients (40.4%) had a BTS ≥4. Female patients (P \u3c .001) and younger patients (26.7 vs 30.9 years, P = .030) were more likely to have a BTS ≥4. Male patients had significantly thicker superior capsules (3.4 mm vs. 2.8 mm, P = .034). BTS was not associated with capsular thickness when controlling for sex. On CT, femoral version (18.9° vs 11.4°, P \u3c .001), and McKibben index (37.8° vs. 28.2°, P \u3c .001) were significantly greater in those with a BTS ≥4. Patients with a BTS ≥4 had more hip internal rotation at 90° of flexion (15.0° vs 10.0°, P \u3c .001), when prone (30.0° vs 20.0°, P = .004), and in extension (10.0° vs. 5.0°, P \u3c .001). CONCLUSIONS: All female patients, regardless of Beighton score, and all patients with a BTS ≥4 indicated for primary hip arthroscopy for femoroacetabular impingement syndrome with or without dysplasia were more likely to have thinner superior hip capsules on MRI and greater hip internal rotation on exam. Bony morphologic differences exist between sexes and between patients with and without hypermobility, likely contributing to differences in ROM. LEVEL OF EVIDENCE: III, retrospective cohort study

The Vehicle, Spring 1980

Vol. 3, No. 2 Table of Contents White LanguageStarla Stensaaspage 4 The Grand Canyon at SunsetElisabeth Cristpage 5 WitheringSheila Kattypage 5 In Defense of the DandelionKathleen Alakspage 6 HaikuScott Fishelpage 7 Double SolitaireCathy Georgepage 8 AdolescenceNancy Douglaspage 9 Sunrises as SunsetsRobert Schumacherpage 9 War Is Not All HellChris Goerlichpage 11 Young SoldierRobert Swansonpage 11 Without Really Looking For ThemSheila Kattypage 12 JourneyJean Wallacepage 15 I Barely Remember the Poet/TeacherStarla Stensaaspage 16 To SearchKaren Buchananpage 17 Four-Hundred and Twenty-Four DaysAnnette Heinzpage 19 Killing CarpJerry McAnultypage 20 War of the WillsLaurel Anzelmopage 21 Life of a Sexual MetaphorChris Goerlichpage 23 Hazy Days in Mid-JulyKaren Buchananpage 24 August\u27s EndCynthia Rozminpage 24 Visiting GrandmotherRobert Swansonpage 26 UntitledNancy Van Cleavepage 27 The AlbinoDenise Davinroypage 27 This ChristmasRobert Schumacherpage 28 Burnt OfferingGinny Stroheckerpage 29 Long-term VacationDenise Davinroypage 29 Storm\u27s EveJeffrey Stousepage 30 Lovers: A Weaver in the StatesStarla Stensaaspage 31 Gitchegumme BeachScott Fishelpage 32 Dear Husband, What Do You Think?Katherine Adamspage 33 Cat\u27s Eve InnCynthia Rozminpage 34 BassScott Fishelpage 34 Fall Morning in the Okanagan ValleyJerry McAnultypage 35 MusicMary McDanielpage 36 AnticipationNancy Douglaspage 41 Don\u27t Let Your Bread LoafJohn Stockmanpage 41 The FieldElise Hempelpage 42 the g.a.Carla Vitezpage 42 Quality in Search of An AuthorRobert Schinaglpage 43 February 9thLisa Livingstonpage 44 By A Pond in SpringJohn Stockmanpage 46 Night SoundsJeffrey Stousepage 47 Art CoverKaren Dankovich PhotographCindy Hubbarttpage 3 PhotographScott Fishelpage 10 PhotographLisa Larsonpage 18 EtchingKaren Dankovichpage 25 PhotographScott Fishelpage 30 PhotographScott Fishelpage 40 PhotographCindy Hubbarttpage 45 PhotographCindy Hubbarttpage 48https://thekeep.eiu.edu/vehicle/1037/thumbnail.jp