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In this work we develop a numerical simulation of the spray coating of spinning beverage cans. Though the substrate of the can must be axisymmetric, the coating need not be. We start with an evolution equation, which was derived using scaling arguments and perturbation theory. We then use implicit finite differences and an ADI scheme, with periodic boundary conditions, to efficiently solve the problem numerically. The spray fan is modeled as an expanding ellipse, and we use parameters typical of the coating industry in our simulations. The simulations show that if the can rotates an exact integral number of rotations during the spray process, then the coating layer is almost axisymmetric. But when this cannot be achieved, then three-dimensional effects greatly change the coating dynamics of the thin liquid film and must be included in the analysis.

The coating dynamics of a drying paint film with a yield stress is studied. The liquid is modeled as a binary mixture with one volatile component, solvent, and one nonvolatile component, resin. When the solvent has a different surface tension than the resin, solvent evaporation can lead to the creation of surface tension gradients which can potentially overcome the yield stress and dramatically affect the flow history. Using the lubrication approximations to derive the flux of the liquid film parallel to the substrate, we find that the presence of the yield stress causes several distinct flow regimes. The total flux of each of these regimes is summed, and using the continuity equation we derive an evolution equation giving the height of the free surface as a function of the distance along the substrate and time. The resulting equations are discretized and solved numerically using finite differences. High order derivative is treated implicitly, allowing for large time steps and reducing the computational requirements. We find that the presence of a yield stress greatly affects the leveling behavior of the coating. Critical yield stresses exist that can cause maximal leveling of the coating film.

We detected surface waves from two meteorite impacts on Mars. By measuring group velocity dispersion along the impact-lander path, we obtained a direct constraint on crustal structure away from the InSight lander. The crust north of the equatorial dichotomy had a shear wave velocity of approximately 3.2 kilometers per second in the 5- to 30-kilometer depth range, with little depth variation. This implies a higher crustal density than inferred beneath the lander, suggesting either compositional differences or reduced porosity in the volcanic areas traversed by the surface waves. The lower velocities and the crustal layering observed beneath the landing site down to a 10-kilometer depth are not a global feature. Structural variations revealed by surface waves hold implications for models of the formation and thickness of the martian crust., D.K., S.C., D.G., J.C., C.D., A. K., S.C.S., N.D., and G.Z. were supported by the ETH+ funding scheme (ETH+02 19-1: “Planet Mars”). Marsquake Service operations at ETH Zürich were supported by ETH Research grant ETH-06 17-02. N.C.S. and V.L. were supported by NASA PSP grant no. 80NSSC18K1628. Q.H. and E.B. are funded by NASA grant 80NSSC18K1680. C.B. and J.L. were supported by NASA InSight PSP grant no. 80NSSC18K1679. S.D.K. was supported by NASA InSight PSP grant no. 80NSSC18K1623. P.L., E.B., M.D., H.S., E.S., M.W., Z.X., T.W., M.P., R.F.G. were supported by CNES and the Agence Nationale de la Recherche (ANR-19-CE31-0008-08 MAGIS) for SEIS operation and SEIS Science analysis. A.H., C.C. and W.T.P. were supported by the UKSA under grant nos. ST/R002096/1, ST/ W002523/1 and ST/V00638X/1. Numerical computations of McMC Approach 2 were performed on the S-CAPAD/DANTE platform (IPGP, France) and using the HPC resources of IDRIS under the allocation A0110413017 made by GENCI. A.H. was supported by the UKSA under grant nos. ST/R002096/1 and ST/W002523/1. F.N. was supported by InSight PSP 80NSSC18K1627. I.J.D. was supported by NASA InSight PSP grant no. 80NSSC20K0971. L.V.P. was funded by NASANNN12AA01C with subcontract JPL-1515835. The research was carried out in part by W.B.B., M.G. and M.P.P. at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004)

Background The Public Opinion Survey of Human Attributes–Stuttering/Child (POSHA-S/Child; Weidner & St. Louis, 2014 ) is a standard instrument designed to measure the attitudes of children as young as 3 years of age toward stuttering. With preschool and early elementary school–aged children, the POSHA-S/Child is administered individually and face-to-face by an examiner. Older children who are satisfactory readers could be expected to respond to the instrument online, an increasingly popular mode of administering surveys. Purpose The purpose of this study was to compare administration of the POSHA-S/Child in face-to-face versus online administration. Method Children primarily from 1 elementary school and children from other areas in the region responded to the POSHA-S/Child in either a face-to-face individual setting or online. Three grade levels were included: 3rd grade, 4th grade, and 5th grade. Results POSHA-S/Child ratings for individual items, components, subscores, and the Overall Stuttering Scores from the 2 modes of administration were similar. Conclusion With satisfactory reading abilities, children aged 9 years and older can be administered the POSHA-S/Child online with similar results as face-to-face administration.

Purpose Negative or uninformed stuttering attitudes proliferate among the general public, and bourgeoning research has shown that such attitudes might emerge as early as the preschool years. Much remains unknown about young children's stuttering attitudes, and conclusive recommendations to improve attitudes toward stuttering have yet to be advanced. This study sought to determine the effect of a new educational program on improving stuttering attitudes among preschool children using objective measures. Method Thirty-seven preschool children learned about stuttering and sensitive peer interactions by participating in the newly developed Attitude Change and Tolerance program. The program teaches children about human differences with an emphasis on stuttering and how to interact with people who stutter. Children's stuttering attitudes were measured using the Public Opinion Survey of Human Attributes–Stuttering/Child (Weidner & St. Louis, 2014) before and after the program. Results Pre–post comparisons showed statistically significant improvements in children's overall stuttering attitudes. In particular, children demonstrated gains relative to their perceptions of and reactions toward people who stutter. Conclusion This study provides empirical evidence that young children's stuttering attitudes can be improved using the Attitude Change and Tolerance program. In addition, it supports previous research that negative stuttering attitudes emerge as early as preschool.

Context. Silicon solid-state detectors are commonly used for measuring the specific ionization, dE∕dx, in instruments designed for identifying energetic nuclei using the dE∕dx versus total energy technique in space and in the laboratory. The energy threshold and species resolution of the technique strongly depend on the thickness and thickness uniformity of these detectors. Aims. Research has been carried out to develop processes for fabricating detectors that are thinner than 15 μm, that have a thickness uniformity better than 0.2 μm over cm2 areas, and that are rugged enough to survive the acoustic and vibration environments of a spacecraft launch. Methods. Silicon-on-insulator wafers that have a device layer of the desired detector thickness supported by a thick handle layer were used as starting material. Standard processing techniques were used to fabricate detectors on the device layer, and the underlying handle-layer material was etched away leaving a thin, uniform detector surrounded by a thick, supporting frame. Results. Detectors as thin as 12 μm were fabricated in two laboratories and successfully subjected to environmental and performance tests. Two detector designs were used in the High-energy Energetic Particles Instrument, which is part of the Integrated Science Investigation of the Sun instrument suite on NASA’s Parker Solar Probe spacecraft. These detectors have been performing well for more than two years in space. Conclusions. Thin silicon detectors in d E∕dx versus total energy instruments enable the identification of nuclei with energies down to ~1 MeV nuc−1. This research suggests that detectors at least a factor of two thinner should be achievable using this fabrication technique.

Stuttering therapy for children, both preschool and school-age, has been offered in a variety of settings and formats, for example in schools, university clinics, outpatient clinics, and private practices. Therapy itself is offered either in a group setting or a one-to-one basis in many of these settings. In recent years, there has been an increase in specialized camps (generally offered in the summer) for children who stutter. Camps for children who stutter vary in duration and offer a combination of group and individual therapy in addition to activities designed to address the affective and cognitive aspects of stuttering and increase overall communicative effectiveness. This paper provides an overview and description of five such camps for children who stutter to help spread awareness and familiarize the listener with the role camps play in helping children who stutter. Preliminary outcome data on the various goals targeted within some of the camps is included; however, that is not the purpose of this paper.

Background Theories relating to young children’s social cognitive maturity and their prevailing social groups play important roles in the acquisition of attitudes. Previous research has shown that preschool and kindergarten children’s stuttering attitudes are characterized by stronger negative beliefs and self reactions than those of parents. By contrast, 12 year-old children’s stuttering attitudes have been shown to be similar to their parents’ attitudes. Other research indicates that parental stuttering attitudes are no different from attitudes of adults who are not parents. Purpose The purpose of this study was to explore children’s stuttering attitudes of preschool through 5th grade children and to compare them to their parents’ attitudes. Method Children and parents from a rural Appalachian elementary school and child/parent pairs from other areas in the region responded to child and adult versions of the Public Opinion Survey of Human Attributes–Stuttering (POSHA–S/Child and POSHA–S). Seven grade levels were included: preschool, kindergarten, 1st grade, 2nd grade, 3rd grade, 4th grade, and 5th grade. Results Confirming earlier research, younger children’s attitudes toward stuttering were considerably less positive than those of their parents. As children matured up to the fifth grade, however, their stuttering attitudes progressively were more positive. Parents’ stuttering attitudes were quite consistent across all seven grade levels. Conclusions Consistent with theories of attitudinal development, between the ages of 4 and 11 years, children’s measured attitudes toward stuttering improved and gradually approximated the attitudes of their parents and the general public.

This clinical paper focuses on a case vignette for a teenager who stutters to highlight comprehensive assessment and treatment of stuttering. The case emphases the need for assessment and treatment approaches that focus on the multi-dimensional nature of stuttering. Case vignettes may be one way to help clinicians gain a better understanding of stuttering assessment and treatment.

NASA’s Parker Solar Probe (PSP) spacecraft (formerly Solar Probe Plus) is scheduled for launch in July 2018 with a planned heliocentric orbit that will carry it on a series of close passes by the Sun with perihelion distances that eventually will get below 10 solar radii. Among other in-situ and imaging sensors, the PSP payload includes the two-instrument “Integrated Science Investigation of the Sun” suite, which will make coordinated measurements of energetic ions and electrons. The high-energy instrument (EPI-Hi), operating in the MeV energy range, consists of three detector-telescopes using silicon solid-state sensors for measuring composition, energy spectra, angular distributions, and time structure in solar energetic particle events. The expected performance of this instrument has been studied using accelerator calibrations, radioactive-source tests, and simulations. We present the EPI-Hi measurement capabilities drawing on these calibration data and simulation results for illustrations.

Purpose While many resources, particularly those available on the Internet, provide suggestions for fluent speakers as they interact with people who stutter (PWS), little evidence exists to support these suggestions. Thus, the purpose of this study was to document the supportiveness of common public reactions, behaviors, or interventions to stuttering by PWS.Methods 148 PWS completed the Personal Appraisal of Support for Stuttering-Adults. Additionally, a comparison of the opinions of adults who stutter based on gender and their involvement in self-help/support groups was undertaken. Results Many of the Internet-based suggestions for interacting with PWS are aligned with the opinions of the participants of this study. Significant differences were found amongst people who stutter on the basis of gender and involvement in self-help groups.Conclusions Lists of “DOs and DON’Ts” that are readily available on the Internet are largely supported by the data in this study; however, the findings highlight the need for changing the emphasis from strict rules for interacting with people who stutter to more flexible principles that keep the needs of individual PWS in mind.

The first ever symposium devoted entirely to the study of attitudes toward stuttering was held September 4–7, 2013 in Morgantown, WV. Identified as the “Stuttering Attitudes Research Symposium,” the event brought together scientists, clinicians, and stakeholders to document the current state of the art and science in all the areas of inquiry related to this topic. The symposium drew leading experts in stuttering attitudes worldwide, in addition to local clinicians and students.

Spin coating is frequently used by the coating industry to achieve a very uniform final coating layer on a given substrate. Most of the research into this area has focused on flat substrates, but in this work we use scaling arguments and perturbation methods to derive the lubrication form of the equations governing the fluid motion of a thin liquid film on a curved, rotating, axisymmetric substrate. Though the substrate must be axisymmetric, the coating need not be. Though the slope of the substrate must be continuous, the curvature of the substrate need not be. One application for this work is the spin coating of food and beverage cans, most of which have a curved bottom due to structural reasons. Using an implicit finite difference scheme, we use our derivation to develop a numerical model to simulate the spin coating of the interior of a model soup can. We assume that the coating is initially uniform and model how centrifugal forces drive the coating outward past a series of axisymmetric undulations on the can bottom.

Background: In this paper, two new measures of public attitudes toward stuttering, the public opinion survey of human attributes-stuttering/child (POSHA-S/Child), an epidemiological instrument for young children, and the appraisal of the stuttering environment (ASE), a clinical self-report instrument to measure attitudes among family members and close friends of stuttering clients, are compared with the widely-used public opinion survey of human attributes-stuttering (POSHA-S). Previous studies were integrated with a new study to document that both the POSHA-S/Child and the ASE provide similar summary ratings (Beliefs and Self Reactions sub scores and Overall Stuttering Scores) to the POSHA-S. Purpose: The study sought to document the extent to which measured stuttering attitudes on two new measures, the ASE and the POSHA-S/Child, correspond with an established measure, the POSHA-S. Second, it sought to determine the extent to which being a parent affected adults’ measured attitudes toward stuttering. Third, using the new measures, the study sought to compare young children’s attitudes with those of parents. Method: In the experimental portion of the study, parents of 3-7 year old children, parents of older children, and nonparents filled out the ASE either in paper or online versions. These results were compared to published research on children’s attitudes using the POSHA-S/Child. Results: Measured stuttering attitudes of all three groups of parents on the ASE, although disparate for several demographic variables, were nearly the same. Therefore, based on comparisons with reviewed studies of attitudes of young children using the POSHA-S/Child, parental attitudes were uniformly more positive than attitudes of young children. Implications: The results strongly suggest that one’s parental status has little effect on stuttering attitudes and that parent’ attitudes are more positive than attitudes of their young children.

Die Verbande der Kommunikationswirtschaft haben sich erneut weiter ausdifferenziert. Sie decken ein vielfaltiges Aufgabenspektrum ab, das durch unterschiedliche Schwerpunktbildung gekennzeichnet ist und sektorale Interessenvertretung ebenso umfasst wie auch spezielle Mitgliederservices und die Entwicklung fachlicher Beitrage zur Fortentwicklung des insgesamt komplexen Arbeitsfeldes.

The melting point and phase behaviour of cocoa butter under CO2 pressure were observed in a high-pressure view cell. The melting point decreases from 35 to 23 °C at CO2 pressures higher than 5 MPa. A static analytical procedure was used to measure the solubility of CO2 in cocoa butter at 40, 80 and 100 °C and pressures of 2–35 MPa in an autoclave set-up. The density and viscosity of the CO2-saturated cocoa butter was measured simultaneously in this set-up. The experimental procedure was first validated by comparing the data measured for the system CO2/hexadecane with literature data. The highest solubility of CO2 in cocoa butter of 36 wt.% occurs at 40 °C and 35 MPa. The measured solubilities differed from those previously reported in literature. This can be attributed to differences in the cocoa butter used for measurements. The density of CO2-saturated cocoa butter increases with pressure, whereas the viscosity decreases. The Grunberg equation was used to correlate the viscosity of CO2-saturated cocoa butter. The measured data were used to estimate the theoretical gas assisted mechanical expression (GAME) yields. In GAME CO2-saturated cocoa nibs are mechanically expressed. The calculated GAME yields deviate from the experimental ones due to the oversimplification of the mechanism involved in GAME.

Purpose This study investigated attitudes of nonstuttering preschool and kindergarten children toward peers who stutter in order to identify differences by age groups and better understand the genesis of stuttering attitudes. The study also examined the use of a new stuttering attitudes instrument designed for use with young children. Method The newly developed Public Opinion Survey on Human Attributes–Stuttering/Child was verbally administered to 27 preschool and 24 kindergarten children who do not stutter in the mid-Atlantic region of the USA. Results Overall, preschoolers held more negative stuttering attitudes than kindergarteners, but results were not uniformly in that direction. In both groups, the attribute of stuttering was viewed more negatively than individuals who stutter. Children viewed the potential of peers who stutter as quite positive, whereas their knowledge about and experience with stuttering were generally limited and some of their beliefs quite negative. Conclusions Negative or uninformed stuttering attitudes among nonstuttering children begin as early as the preschool years. This study provides empirical evidence for the need to educate young children about the nature of stuttering and how to respond appropriately to peers who stutter. Educational objectives: Readers should be able to: (a) describe attitudinal differences between kindergarteners and preschoolers toward peers who stutter; (b) describe the parameters of the POSHA–S / Child ; (c) describe the nature of stuttering attitudes in young children relative to their beliefs and self reactions; and (d) describe the implications and future direction of stuttering attitude research in young children.

We consider the effect of a magnetic field generated by a current flowing in the axial direction, in a cylindrical conducting medium on the evolution of a thin magnetic liquid film coating the outside of the cylinder. We first derive the new governing equations when a body force, due to the interaction of the magnetic dipoles in the liquid with the magnetic field due to the current in the cylinder, is included with surface tension and gravitational forces. The equations are discretized and solved numerically using an alternating direction implicit algorithm. Simulations demonstrate that the transition from a uniform coating to the formation of undulations to a final configuration of distinct drops follows a similar evolution for a wide range of cylinder radii and magnetic field strengths. Magnetic forces generally oppose the effects of gravity, and consequently the drainage toward the bottom of the cylinder is slowed, the characteristic time for drop formation is delayed, and the final coating is not conf...