1,275 research outputs found
Belonging: The What, Why, and How for Working Mothers
For new mothers, feeling like you belong can be the difference between surviving or thriving in the transition back to work. In this paper, I explore belonging as a psychological construct, including how it is measured, experienced and cultivated in different contexts, and apply that to the realities of working motherhood. Mothers who successfully find belonging experience higher well-being as individuals. Organizations who are able to help new mothers find belonging positively impact the diversity of their workforces and can rectify the inequality in women’s work experiences. A sense of belonging can foster many elements of well-being. This paper not only reviews the literature on belonging, but also provides a roadmap for working mothers and those who support them at work
The Elemental Composition and the Spatial Distributions of Elements in the Crab Nebula
We present new observations and photoionization calculations for investigating gaseous regions that represent expected nuclear processing in the Crab Nebula supernova remnant. High helium abundance is shown to cause a very efficient [N II] ¸¸6548,6583 emitting zone which can account for some strong nitrogen emission. This high helium abundance causes strong emission of [C I] ¸¸9823,9850. When emission line measurements are compared with model simulations, most of the nebular gas appears to have depleted or solar nitrogen and enhanced carbon. This argues for a precursor star that had a mass greater than 9.5M¯. We also use images of selected emission lines along with photoionization calculations to investigate the overall spatial distribution of elements in the Crab Nebula. We introduce new methods of calibrating direct images, including using existing Fabry-Perot data to take into account the different line-of-sight velocities of each individual filament. After processing, we compare these flux distributions with a large number of numerical model simulations to produce abundance maps of helium, nitrogen, oxygen, and sulfur in the Crab Nebula. These maps show evidence of gas that has undergone Carbon-Nitrogen-Oxygen processing, helium-burning, and oxygen-burning. High sulfur abundances mixed with gas representative of CNO processing were most likely generated from an off-center oxygen flash and then repositioned north and southeast from the pulsar by a relativistic wind. Clear evidence of oxygen burning material in the remnant gives strong support for a precursor star mass near 10M¯
Mission Control Center - Houston
The Mission Control Center - Houston (MCC-H) was designed to control all NASA manned space flights from the first Gemini rendezvous through the Apollo program. The MCC-H is a three-story building which contains 112,000 square feet, and which required 30 months to implement. It has a capability to control a live mission and a simulation simultaneously, or two simulations simultaneously. This capability was provided by locating duplicate operational areas on separate floors. The facility layout is shown in Figures 1, 2, and 3.
The MCC-H is comprised of five basic systems: the Display/Control System, the Real Time Computer Complex (RTCC), the Communications System, the Command System, and the Simulation, Checkout, and Training System (SCATS). These systems are designed to provide the flight operations team with the necessary real-time data and associated reference data for rapid assessment of mission progress, and for rapid decisions in the event of abnormal or emergency situations. The reference data are the result of the enormous effort that is spent prior to the mission in analyzing every possible contingency situation that may occur, and contains predicted trend data, mission rules and carefully planned, detailed operational procedures for regulating the mission
Evaluation of shale oil and gas plays - Part I: Shale reservoir property modelling of the North Sea Kimmeridge Clay Formation
The Kimmeridge Clay Formation (KCF) forms the source rock for most conventional hydrocarbon accumulations within the UK North Sea. However, only a few previous studies have analyzed the potential of the KCF for unconventional resources (i.e., shale oil and gas).
Here, we use machine learning techniques combined with established rock property equations to generate geochemical, petrophysical and geomechanical logs for 16 wells within Quadrant 15 of the Outer Moray Firth, UK North Sea. The neural network models used to generate geochemical logs are trained using the Levenberg-Marquardt backpropagation algorithm. The generated well logs and new KCF depth maps, constrained by an existing Base Cretaceous Unconformity (BCU) map of the UK North Sea and well top information from 48 wells, are used for 3D geostatistical modelling of KCF properties across the area. The resulting KCF property maps allow us to assess the shale oil and gas play potential across the region.
Our results suggest good organic richness and hydrocarbon yield potential for the KCF within the study area, with up to 9 wt% original total organic carbon (TOCo), 48 mg/g original hydrocarbon yield (S2o), and 607 mg/gTOC original hydrogen index (HIo). Modelled total porosity values range between 2 and 13%, and brittleness indices lie between 25 and 65%, within the range reported for proven shale oil and gas plays.
A sweet spot map, created by integrating our modelled KCF properties, indicates prospective areas for shale oil and gas exploitation within the central Witch Ground Graben, and to a lesser extent areas of the Piper Shelf and Claymore-Tartan Ridge. These areas show good potential based on all investigated properties, with respect to industry standards
Effects of State Sales Tax on GDP Per Capita: A Statewide Study for the United States
Economists have viewed the relationship between the impact of taxes on the GDP, however research
dealing with the sales tax rate and the GDP have yet to be analyzed to the extent that income taxes have
been investigated. In an effort to fill this void, we examine how the state sales tax rate across all fifty
states within the United States impact the corresponding state’s real GDP per capita. There will be a
simple regression model along with additional multiple regressions to analyze the impact of the state sales
tax rate on the state’s economy. As a result of this investigation, the R-squared value increased
dramatically from the initial simple regression to the last multiple regression model, as well as the
statistical significance of certain explanatory variables, including the state sales tax rate
Density-functional study of Cu atoms, monolayers, and coadsorbates on polar ZnO surfaces
The structure and electronic properties of single Cu atoms, copper monolayers
and thin copper films on the polar oxygen and zinc terminated surfaces of ZnO
are studied using periodic density-functional calculations. We find that the
binding energy of Cu atoms sensitively depends on how charge neutrality of the
polar surfaces is achieved. Bonding is very strong if the surfaces are
stabilized by an electronic mechanism which leads to partially filled surface
bands. As soon as the surface bands are filled (either by partial Cu coverage,
by coadsorbates, or by the formation of defects), the binding energy decreases
significantly. In this case, values very similar to those found for nonpolar
surfaces and for copper on finite ZnO clusters are obtained. Possible
implications of these observations concerning the growth mode of copper on
polar ZnO surfaces and their importance in catalysis are discussed.Comment: 6 pages with 2 postscript figures embedded. Uses REVTEX and epsf
macro
The Impact of Collaborative Modalities on Wireless Robotics
Many mathematicians would agree that, had it not been for evolutionary programming, the refinement of the UNIVAC computer might never have occurred. In our research, we disconfirm the investigation of SCSI disks, which embodies the technical principles of theory [28, 6, 18]. In our research, we examine how journaling file systems can be applied to the synthesis of Boolean logic
Special Issue on Designing With and For Users on the Autism Spectrum
Autism is a lifelong neurodevelopmental condition that affects how a person communicates with and relates to other people, and to the world around them. It is estimated that around 1 in 68 people are autistic (Christensen et al., 2016 Christensen, D. L., Baio, J., Van Naarden Braun, K., Bilder, D., Charles, J., Constantino, J. N., … Yeargin-Allsopp, M. (2016). Prevalence and characteristics of autism spectrum disorder among children aged 8 years
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