3,945 research outputs found
Zinc abundances of planetary nebulae
Zinc is a useful surrogate element for measuring Fe/H as, unlike iron, it is
not depleted in the gas phase media. Zn/H and O/Zn ratios have been derived
using the [Zn IV] emission line at 3.625um for a sample of nine Galactic
planetary nebulae, seven of which are based upon new observations using the
VLT. Based on photoionization models, O/O++ is the most reliable ionisation
correction factor for zinc that can readily be determined from optical emission
lines, with an estimated accuracy of 10% or better for all targets in our
sample. The majority of the sample is found to be sub-solar in [Zn/H]. [O/Zn]
in half of the sample is found to be consistent with Solar within
uncertainties, whereas the remaining half are enhanced in [O/Zn]. [Zn/H] and
[O/Zn] as functions of Galactocentric distance have been investigated and there
is little evidence to support a trend in either case.Comment: Accepted MNRAS, 11 pages, 8 figure
Sexual harassment of working women
The subject of this thesis is sexual harassment of working women. Sexual harassment is defined for the purposes of this research as any repeated an unwanted sexual comments, looks, suggestions or physical contact that one finds objectionable or offensive and causes one discomfort on the job or in the classroom. Sexual harassment has been discussed and debated in the popular media since the mid 1970s. It has also become a legal issue and a number of sexual harassment suits have been filed by sexually harassed women
Motion of James Neff to Quash Subpoenas or Protective Order
This motion was filed by investigative journalist and author James Neff to quash a subpoena by the State and the Sheppard Estate. Neff began to investigate the murder of Marilyn Sheppard in 1989 with plans to publish his findings in a book titled, “Chasing the Fugitive”, with Random House Publishing. He argued that compelling him to testify, and make public the results of his investigation and research, prior to publication, would interfere, and likely injure, his livelihood as a self-employed investigative journalist. Neff asks the court not to compel him to testify, or in the alternative to compensate him for his testimony
Constraints on Mars Aphelion Cloud Belt Phase Function and Ice Crystal Geometries
This study constrains the lower bound of the scattering phase function of
Martian water ice clouds (WICs) through the implementation of a new observation
aboard the Mars Science Laboratory (MSL). The Phase Function Sky Survey (PFSS)
was a multiple pointing all-sky observation taken with the navigation cameras
(Navcam) aboard MSL. The PFSS was executed 35 times during the Aphelion Cloud
Belt (ACB) season of Mars Year 34 over a solar longitude range of
L_s=61.4{\deg}-156.5{\deg}. Twenty observations occurred in the morning hours
between 06:00 and 09:30 LTST, and 15 runs occurred in the evening hours between
14:30 and 18:00 LTST, with an operationally required 2.5 hour gap on either
side of local noon due the sun being located near zenith. The resultant WIC
phase function was derived over an observed scattering angle range of
18.3{\deg} to 152.61{\deg}, normalized, and compared with 9 modeled phase
functions: seven ice crystal habits and two Martian WIC phase functions
currently being implemented in models. Through statistical chi-squared
probability tests, the five most probable ice crystal geometries observed in
the ACB WICs were aggregates, hexagonal solid columns, hollow columns, plates,
and bullet rosettes with p-values greater than or equal to 0.60,
0.57,0.56,0.56, and 0.55, respectively. Droxtals and spheres had p-values of
0.35, and 0.2, making them less probable components of Martian WICs, but still
statistically possible ones. Having a better understanding of the ice crystal
habit and phase function of Martian water ice clouds directly benefits Martian
climate models which currently assume spherical and cylindrical particles.Comment: Accepted Manuscript by Planetary and Space Scienc
Children’s preference for HAS and LOCATED relations: A word learning bias for noun–noun compounds
The present study investigates children’s bias when interpreting novel noun–noun compounds (e.g. kig donka) that refer to combinations of novel objects (kig and donka). More specifically, it investigates children’s understanding of modifier–head relations of the compounds and their preference for HAS or LOCATED relations (e.g. a donka that HAS a kig or a donka that is LOCATED near a kig) rather than a FOR relation (e.g. a donka that is used FOR kigs). In a forced-choice paradigm, two- and three-year-olds preferred interpretations with HAS/LOCATED relations, while five-year-olds and adults showed no preference for either interpretation. We discuss possible explanations\ud
for this preference and its relation to another word learning bias that is based on perceptual features of the referent objects, i.e. the shape bias. We argue that children initially focus on a perceptual stability rather than a pure conceptual stability when interpreting the meaning of nouns
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