1,326 research outputs found
Explaining Small-Business Development: A Small-Business Development Model Combining the Maslow and the Hayes and Wheelwright Models
This paper looks at small-business management from the standpoint of Maslow’s hierarchy of needs and Hayes and Wheelwright’s four-stage model. The paper adapts Maslow’s hierarchy of needs model to small- business development and evolution. Additionally, Hayes and Wheelwright’s four-stage model is combined with the adapted Maslow small-business development model. The implications of the new model on the development of small businesses and future research are discussed
A Tale of Two Dogs Fine Art Exhibit
The purpose of this paper is a formal examination of the fine art exhibit titled A Tale of Two Dogs by Jeffrey A. Harris as a partial fulfillment of requirements for a Master of Fine Arts degree from Stephen F. Austin State University.
By examining the multiple established points of view within his artwork, the author questions these establishments and asks if this approach leads to a relevant way of seeing. Using expanded polystyrene foam as a sculpture medium, a series of artworks created during the MFA research process are conceptually analyzed to explore the value of maintaining a multiplicity of viewpoints within a single composition. Through the examination of the various artworks and techniques, the author discovers that using multiple, often divergent points of view, within a single artwork (and by extension, a single exhibit) benefits the artist as a method of pushing creativity forward
Investigation of Relative Importance of Some Error Sources in Particle Image Velocimetry
Particle image velocimetry (PIV) is an optical technique used to measure fluid velocity. PIV measurements have many sources that create uncertainty in the velocity results. The objective of this report is to investigate some commonly cited uncertainty sources and to show methods than can be used to find the value of the uncertainty sources. These sources are: magnification, calibration, perspective, resolution and the computation scheme. Experiments were conducted to find the impact that sources have on the velocity measurements. Several methods are presented to demonstrate how to measure the uncertainty of error for a PIV experiment. Some error quantities are computed and found experimentally. Several error sources were found to be small. Some sources depend on the setup of the experiment and should be computed for every experiment. One method that has been presented for finding the uncertainty in the computation scheme was found to be unreliable for small particles
Dwarf Galaxies in the Coma Cluster. I. Detection, Measurement and Classification Techniques
Deep B- and R-band CCD images of the central ~700 arcmin^2 of the Coma
cluster core have been used to measure the dwarf-galaxy population in Coma. In
this paper, we describe a newly developed code for automated detection,
photometry and classification of faint objects of arbitrary shape and size on
digital images. Intensity-weighted moments are used to compute the positions,
radial structures, ellipticities, and integrated magnitudes of detected
objects. We demonstrate that Kron-type 2r_1 aperture aperture magnitudes and
surface brightnesses are well suited to faint-galaxy photometry of the type
described here. Discrimination between starlike and extended (galaxy) objects
is performed interactively through parameter-space culling in several possible
parameters, including the radial moments, surface brightness, and integrated
color versus magnitude. Our code is tested and characterized with artificial
CCD images of star and galaxy fields; it is demonstrated to be accurate, robust
and versatile. Using these analysis techniques, we detect a large population of
dE galaxies in the Coma cluster core. These dEs stand out as a tight sequence
in the R, (B-R) color-magnitude diagram.Comment: Accepted for publication PASP; 29 pages LaTeX (AASTeX using
aaspp4.sty), with 9 EPS figures available from
http://www.sci.wsu.edu/math/faculty/secker/ftp
The Early-type Dwarf-to-Giant Ratio and Substructure in the Coma Cluster
We have obtained new CCD photometry for a sample of early-type
galaxies (dwarf and giant ellipticals) in the central 700 arcmin of the
Coma cluster, complete in color and in magnitude to mag ( mag for km/sec/Mpc). The composite luminosity function for all
galaxies in the cluster core (excluding NGC 4874 and NGC 4889) is modeled as
the sum of a Gaussian distribution for the giant galaxies and a Schechter
function for the dwarf elliptical galaxies. We determine that the early-type
dwarf-to-giant ratio (EDGR) for Coma is identical to that measured for the less
rich Virgo cluster; i.e., the EDGR does not increase as predicted by the
EDGR-richness correlation. We postulate that the presence of substructure is an
important factor in determining the cluster's EDGR; that is, the EDGR for Coma
is consistent with the Coma cluster being built up from the merger of multiple
less-rich galaxy clusters.Comment: 13 pages, LaTeX file, 3 EPS figures, uses aaspp4.sty; also available
from: http://www.sci.wsu.edu/math/faculty/secker/secker.html; to be published
in ApJ, 469 (Oct.1, 1996
STOP, LOOK, AND LISTEN TO WHAT YOUR DATA IS TELLING YOU!
Join us for a ride on the Data Train where you will STOP, LOOK, and LISTEN to what your data is telling you and use the information to develop a process of continuous improvement in your after-school program to be an effective co-collaborator of closing the achievement gap. This workshop will provide information and strategies to be used in K – 12. Participants will learn the importance of data analysis in afterschool. Participants will learn how to work with regular day school professionals in determining what data sources to use. Participants will be able to analyze sample data and develop an action plan. Participants will develop a process of continuous improvement which utilizes student data
The Impact of Religious Commitment on Women’s Sexual Self-Esteem
Religious commitment is associated with decreased sexual activity, poor sexual satisfaction, and sexual guilt, particularly among women. The purpose of this paper was to investigate how religious commitment is related to sexual self-esteem among women. Participants included 196 female undergraduate students, 87 % of whom identified as Christian. Participants completed the Sexual Self-Esteem Inventory for Women (SSEI-W), Religious Commitment Inventory-10, Revised Religious Fundamentalism Scale, Brief Sexual Attitudes Scale, and a measure of their perception of God’s view of sex. Results suggested that women with high religious commitment held more conservative sexual attitudes. Significant relationships between religious commitment and two subscales (moral judgment and attractiveness) of the SSEI-W revealed that women with high religious commitment were less likely to perceive sex as congruent with their moral values and simultaneously reported significantly greater confidence in their sexual attractiveness. A significant relationship between religious commitment and overall sexual self-esteem was found for women whose religion of origin was Catholicism, such that those with higher religious commitment reported lower sexual self-esteem. A hierarchical regression analysis revealed that high religious commitment and perception that God viewed sex negatively independently predicted lower sexual selfesteem, as related to moral judgment. Implications of the findings are provided
Dwarf Galaxies in the Coma Cluster. II. Photometry and Analysis
We study the dwarf galaxy population in the central ~700 arcmin^2 of the Coma
cluster, the majority of which are early-type dwarf elliptical (dE) galaxies.
Analysis of the statistically-decontaminated dE galaxy sequence in the
color-magnitude diagram reveals a highly significant trend of color with
magnitude (\Delta (B-R)/\Delta R = -0.056\pm0.002 mag), in the sense that
fainter dEs are bluer and thus presumably more metal-poor. The mean color of
the faintest dEs in our sample is (B-R)~1.15 mag, consistent with a color
measurement of the diffuse intracluster light in the Coma core. This
intracluster light could then have originated from the tidal disruption of
faint dEs in the cluster core. The total galaxy luminosity function (LF) is
well modeled as the sum of a log-normal distribution for the giant galaxies,
and a Schechter function for the dE galaxies with a faint-end slope \alpha =
-1.41\pm0.05. This value of \alpha is consistent with those measured for the
Virgo and Fornax clusters. The spatial distribution of the faint dE galaxies
(19.0 < R \le 22.5 mag) has R_c = 22.15 arcmin (~0.46h^{-1} Mpc), significantly
larger than the R_c = 13.71 arcmin (~0.29h^{-1} Mpc) found for the cluster
giants and the brighter dEs (R \le 19.0 mag), consistent with tidal disruption
of the faint dEs. Finally, we find that most dEs belong to the general Coma
cluster potential rather than as satellites of individual giant galaxies: An
analysis of the number counts around 10 cluster giants reveals that they each
have on average 4\pm 1 dE companions within a projected radius of 13.9h^{-1}
kpc. (Abridged)Comment: Accepted for publication in PASP; 36 pages LaTeX (AASTex using
aaspp4.sty), with 14 EPS figures available from
http://www.sci.wsu.edu/math/faculty/secker/ftp/ ; Single change in the
Introduction (50 kpc corrected to read 50 pc
Archaean and Proterozoic diamond growth from contrasting styles of large-scale magmatism
Precise dating of diamond growth is required to understand the interior workings of the early Earth and the deep carbon cycle. Here we report Sm-Nd isotope data from 26 individual garnet inclusions from 26 harzburgitic diamonds from Venetia, South Africa. Garnet inclusions and host diamonds comprise two compositional suites formed under markedly different conditions and define two isochrons, one Archaean (2.95 Ga) and one Proterozoic (1.15 Ga). The Archaean diamond suite formed from relatively cool fluid-dominated metasomatism during rifting of the southern shelf of the Zimbabwe Craton. The 1.8 billion years younger Proterozoic diamond suite formed by melt-dominated metasomatism related to the 1.1 Ga Umkondo Large Igneous Province. The results demonstrate that resolving the time of diamond growth events requires dating of individual inclusions, and that there was a major change in the magmatic processes responsible for harzburgitic diamond formation beneath Venetia from the Archaean to the Proterozoic
Investigating the potential impact of 1.5, 2 and 3 °C global warming levels on crop suitability and planting season over West Africa
West African rainfed agriculture is highly vulnerable to climate variability and change. Global warming is projected to result in higher regional warming and have a strong impact on agriculture. This study specifically examines the impact of global warming levels (GWLs) of 1.5°, 2° and 3 °C relative to 1971–2000 on crop suitability over West Africa. We used 10 Coupled Model Intercomparison Project Phase5 Global Climate Models (CMIP5 GCMs) downscaled by Coordinated Regional Downscaling Experiment (CORDEX) Rossby Centre’s regional Atmospheric model version 4, RCA4, to drive Ecocrop, a crop suitability model, for pearl millet, cassava, groundnut, cowpea, maize and plantain. The results show Ecocrop simulated crop suitability spatial representation with higher suitability, observed to the south of latitude 14°N and lower suitability to its north for 1971–2000 for all crops except for plantain (12°N). The model also simulates the best three planting months within the growing season from September-August over the past climate. Projected changes in crop suitability under the three GWLs 1.5–3.0 °C suggest a spatial suitability expansion for legume and cereal crops, notably in the central southern Sahel zone; root and tuber and plantain in the central Guinea-Savanna zone. In contrast, projected decreases in the crop suitability index value are predicted to the south of 14°N for cereals, root and tuber crops; nevertheless, the areas remain suitable for the crops. A delay of between 1-3 months is projected over the region during the planting month under the three GWLs for legumes, pearl millet and plantain. A two month delay in planting is projected in the south, notably over the Guinea and central Savanna zone with earlier planting of about three months in the Savanna-Sahel zones. The effect of GWL2.0 and GWL3.0 warming in comparison to GWL1.5 °C are more dramatic on cereals and root and tuber crops, especially cassava. All the projected changes in simulated crop suitability in response to climatic variables are statistically significant at 99% confidence level. There is also an increasing trend in the projected crop suitability change across the three warming except for cowpea. This study has implications for improving the resilience of crop production to climate changes, and more broadly, to food security in West Africa
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