Dating_MissRepresentation.Com: Black Women\u27s Lived Love-Hate Relationship With Online Dating

The increased use of online dating sites has further encouraged corporations’ attempts to capitalize on these mate-seeking trends. Match.com, eHarmony, and OkCupid are primary competitors in a growing market of individuals seeking out potential romantic partners. They offer several mainstream dating options as well as niche-dating sites. Similar to society at large where dating still occurs offline, scholars have revealed that racial hierarchies exist within various online platforms. As such, the roles of gender and ethnicity in online dating environments merit study. Specifically, the experiences of Black women who use Internet dating sites, a virtually unexplored demographic, form the basis of this dissertation. This study consisted of 16 interviews and a demographic survey, which were used to examine Black women’s online dating experiences from their perspectives to determine whether or not online dating sites are productive, love-seeking spaces. Data analysis was conducted utilizing a Google Form survey to collect demographic data and NVivo 11 qualitative software to help generate themes that guided analysis. Themes that emerged included: negative and positive perceptions from men; physical and non-physical attributes participants possessed that men found attractive; whether or not men’s perceptions impacted interview participants’ success or failure in online dating, and whether or not participants viewed their online dating experiences to be in line with those of other Black women. Participants discussed how perceptions from men online influenced their racially-gendered online dating experience

An experimental investigation of receiver system sensitivity

A method of determining the minimum detectable power density incident at the receiving antenna of a UHF receiver is proposed. The minimum detectable power density is the power density required to produce a signal-to-noise ratio of unity in the output of the receiver. The proposed method includes the receiving antenna impedance, the necessary connecting transmission lines, and the receiver impedance. It is shown that an error in the antenna directivity will produce a significant error in the overall sensitivity of a receiving system. Since the directivity is the most difficult system variable to determine experimentally, it is probably the limiting factor in the proposed method. It is shown that the methods presently used to evaluate the receiver system sensitivity are a function of antenna directivity, effective temperature of the receiving antenna, and a term called noise factor. All of these parameters produce considerable error in the experimental evaluation of the sensitivity. It is for this reason that a better method of determining the overall receiving system sensitivity is desirable. The proposed method includes the receiving antenna directivity but does not include the effective temperature of the antenna or the noise factor of the receiver. Elimination of these two variables should improve the accuracy of determining the overall sensitivity. The sensitivity is evaluated in terms of the receiving system variables including the receiving antenna and the receiver. These variables can be measured with greater accuracy than those of the methods presently used. The method is straightforward and can be accomplished in the field by technicians with reasonable accuracy and within a reasonable length of time --Summary, pages 2-3

When You And I Were Young, Maggie.

https://digitalcommons.library.umaine.edu/mmb-vp/2704/thumbnail.jp

A New Look at Adaptive Body Coloration and Color Change in "Common Green Lacewings” of the Genus Chrysoperla (Neuroptera: Chrysopidae)

Green lacewings in the genus Chrysoperla are not always green. They can be yellow (autosomal recessive mutant); change from whitish-yellow to green as young adults; or temporarily turn yellowish, reddish, or brown during diapause. New findings on a yellow mutant in a natural population in southern California and on species-specific diapause coloration are presented, old findings are reviewed, and the adaptive value of color variability and color change in the genus is discusse

What Do You Want To Make Those Eyes At Me For?

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Discovering the True Chrysoperla carnea (Insecta: Neuroptera: Chrysopidae) Using Song Analysis, Morphology, and Ecology

What was once considered a single Holarctic species of green lacewing, Chrysoperla carnea (Stephens), has recently been shown to be a complex of many cryptic, sibling species, the carnea species group, whose members are reproductively isolated by their substrate-borne vibrational songs. Because species in the complex are diagnosed by their song phenotypes and not by morphology, the current systematic status of the type species has become a problem. Here, we attempt to determine which song species corresponds to Stephens' 1835 concept of C. carnea, originally based on a small series of specimens collected in or near London and currently housed in The Natural History Museum. With six European members of the complex from which to choose, we narrow the field to just three that have been collected in England: C. lucasina (Lacroix), Cc2 ‘slow-motorboat', and Cc4 ‘motorboat'. Ecophysiology eliminates C. lucasina, because that species remains green during adult winter diapause, while Cc2 and Cc4 share with Stephens' type a change to brownish or reddish color in winter. We then describe the songs, ecology, adult morphology, and larval morphology of Cc2 and Cc4, making statistical comparisons between the two species. Results strongly reinforce the conclusion that Cc2 and Cc4 deserve separate species status. In particular, adult morphology displays several subtle but useful differences between the species, including the shape of the basal dilation of the metatarsal claw and the genital ‘lip' and ‘chin' of the male abdomen, color and coarseness of the sternal setae at the tip of the abdomen and on the genital lip, and pigment distribution on the stipes of the maxilla. Furthermore, behavioral choice experiments involving playback of conspecific versus heterospecific songs to individuals of Cc2 and Cc4 demonstrate strong reproductive isolation between the two species. Comparison of the adult morphology of song-determined specimens to that of preserved specimens in the original type series and in other collections in The Natural History Museum, London, indicate that the ‘true' Chrysoperla carnea (Stephens) is Cc4. Cc2 cannot be confidently associated with any previously described species and is therefore assigned a new name, Chrysoperla pallida sp. nov., and formally describe

Repetitive Segmental Structure of the Transducin β Subunit: Homology with the CDC4 Gene and Identification of Related mRNAs

Retinal transducin, a guanine nucleotide regulatory protein (referred to as a G protein) that activates a cGMP phosphodiesterase in photoreceptor cells, is comprised of three subunits. We have identified and analyzed cDNA clones of the bovine transducin β subunit that may be highly conserved or identical to that in other G proteins. From the cDNA nucleotide sequence of the entire coding region, the primary structure of a 340-amino acid protein was deduced. The encoded β subunit has a Mr of 37,375 and is comprised of repetitive homologous segments arranged in tandem. Furthermore, significant homology in primary structure and segmental sequence exists between the β subunit and the yeast CDC4 gene product. The Mr 37,375 β subunit polypeptide is encoded by a 2.9-kilobase (kb) mRNA. However, there exists in retina other β-related mRNAs that are divergent from the 2.9-kb mRNA on the basis of oligonucleotide and primer-extended probe hybridizations. All mammalian tissues and clonal cell lines that have been examined contain at least two β-related mRNAs, usually 1.8 and 2.9 kb in length. These results suggest that the mRNAs are the processed products of a small number of closely related genes or of a single highly complex β gene

Song Analysis Reveals a Permanent Population of the Mediterranean Lacewing Chrysoperla agilis (Neuroptera: Chrysopidae) Living in Central Alaska

Chrysoperla agilis Henry et al. (Neuroptera: Chrysopidae) is a widespread, nomadic lacewing in the carnea group of cryptic species. C. agilis has previously been found only in the warm parts of Europe, western Asia, and a few oceanic islands. Like others of the carnea group, C. agilis is identifiable only by its unique courtship song. Recently, a population with by the C. agilis song was discovered in central Alaska; based on its persistence over several years and its distribution over a wide area near Fairbanks, it seems to be permanent rather than transitory. To assess the relationship of this Western Hemisphere population to C. agilis in the Eastern Hemisphere, we 1) analyzed its courtship song, comparing it to the Eurasian song; 2) compared larval and adult morphology of Alaskan and Eurasian specimens; 3) inferred phylogenetic relationships of Alaskan and Eurasian specimens, by using sequences from the cox2 gene; and 4) crossed Alaskan with European individuals, raising their progeny and analyzing their "hybrid” songs. Alaskan C. agilis generally fell within the range of variation of Eurasian individuals for all acoustic and morphological traits, and their hybrid progeny were also acoustically indistinguishable. Phylogenetically, and despite current geographical isolation, Alaskan individuals clustered with Eurasian C. agilis rather than with Western Hemisphere taxa of the carnea group. We conclude that the Alaskan population is a bona fide member of C. agilis. Examination of the geographical pattern of song variation suggests that dispersal to Alaska took place quite recently in a west to east direction, via eastern Asia and the Bering Strai

Neuroethics guiding principles for the NIH Brain Initiative

Neuroscience presents important neuroethical considerations. Human neuroscience demands focused application of the core research ethics guidelines set out in documents such as the Belmont Report. Various mechanisms, including institutional review boards (IRBs), privacy rules, and the Food and Drug Administration, regulate many aspects of neuroscience research and many articles, books, workshops, and conferences address neuroethics. (Farah, 2010; https://bioethicsarchive.georgetown.edu/pcsbi/studies.html; http://www.neuroethicssociety.org/annual-meeting). However, responsible neuroscience research requires continual dialogue among neuroscience researchers, ethicists, philosophers, lawyers, and other stakeholders to help assess its ethical, legal, and societal implications. The Neuroethics Working Group of the National Institutes of Health (NIH) Brain Research through Advancing Innovative Neurotechnologies (BRAIN) Initiative, a group of experts providing neuroethics input to the NIH BRAIN Initiative Multi-Council Working Group, seeks to promote this dialogue by proposing the following Neuroethics Guiding Principles (Table 1)

Linezolid pharmacokinetics in MDR-TB : a systematic review, meta-analysis and Monte Carlo simulation

This work was supported by the Wellcome Trust (grant numbers 109129/Z/15/Z to JM and 105620/Z/14/Z to DS and MC).Objectives The oxazolidinone linezolid is an effective component of drug - resistant TB treatment, but use is limited by toxicity and the optimum dose is uncertain . Current strategies are not informed by clinical pharmacokinetic/pharmacodynamic (PK/PD) data, we aimed to aimed to address this gap. Methods We defined linezolid PK/PD targets for efficacy; free area under the time - concentration curve: minimum inhibitory concentration ratio (ƒAUC0-24:M IC) >119m g/L/hr and safety; free minimum concentration (Cmin) <1.38mg/L . We extracted individual - level linezolid PK data from existing studies on TB patients and performed meta - analysis; producing summary estimates of ƒAUC0-24 and ƒCmin for published doses . Combining these with a published MIC distribution, we performed Monte Carlo simulations of target attainment. Results The efficacy target was attained in all simulated individuals at 300mg q12h and 600mg q12h , but only 20.7% missed the safety target at 300mg q12h versus 98.5% at 600mg q12h . Although suggesting 300mg q12h should be used preferentially, these data were reliant on a single centre . Efficacy and safety targets were missed by 41.0% and 24.2% respectively at 300mg q24h , and 44.5% and 27.5% at 600mg q24h . However, the confounding effect of between study heterogeneity on target attainment for q24h regimens was considerable. Conclusions 300mg q12h linezolid dosing may retain the efficacy of the 600mg q12h licensed dosing with improved safety. Data to evaluate commonly used 300mg q24h and 600mg q24h doses is limited. Comprehensive, prospectively obtained PK/PD data for linezolid doses in drug - resistant TB treatment are required.Publisher PDFPeer reviewe