The Acceptance and Usage of Pornography and Its Effects on College Students\u27 Risky Behaviors and Family Formation Values

This study examines the relationship between the acceptance and usage of pornography and its effects on college students‟ risky behaviors and family formation values. There was a total of 224 respondents at the University of New Hampshire who answered an Internet survey regarding their acceptance and usage of pornography, as well as participation in certain types of risky behaviors and family formation values. Results found that there was a significant difference between males (61.7%) and females (6.93%) who viewed pornography at least once a week. of. However, it was also found that more than half of both men (82.98%) and women (66.93%) say they at least “somewhat agree” that pornography is an acceptable way to express ones sexuality. Results found a significant relationship between both pornography use and participation in risky behaviors, as well as a significant relationship between pornography acceptance and family formation values. The discussion highlights both the strengths and weakness of the study, as well as a comparison of the results to the pioneer study done by Carroll et al (2008)

Chemical investigations into the lipid fraction of latent fingermark residue

The lipid fraction of latent fingermark residue encompasses a number of compounds crucial to fingermark detection on wetted porous substrates. This thesis describes investigations into the detection and chemical analysis of the lipid fraction of latent fingermarks. Two novel reagents for fingermark detection were developed from lipophilic histological stains. Chemical analysis of fingermark lipids found insufficient variation to discriminate between individuals or donor traits, however significant differences were observed as a function of sample age

An untargeted lipidomic approach for qualitative determination of latent fingermark glycerides using UPLC-IMS-QToF-MSE

More detailed fundamental information is required about latent fingermark composition in order to better understand fingermark properties and their impact on detection efficiency, and the physical and chemical changes that occur with time following deposition. The composition of the glyceride fraction of latent fingermark lipids in particular is relatively under-investigated due in part to their high structural variability and the limitations of the analytical methods most frequently utilised to investigate fingermark composition. Here, we present an ultra performance liquid chromatography-ion mobility spectroscopy-quadrupole time-of-flight mass spectrometry (UPLC-IMS-QToF-MSE) method to characterise glycerides in charged latent fingermarks using data-independent acquisition. Di- and triglycerides were identified in fingermark samples from a population of 10 donors, through a combination of in silico fragmentation and monitoring for fatty acid neutral losses. 23 diglycerides and 85 families of triglycerides were identified, with significant diversity in chain length and unsaturation. 21 of the most abundant triglyceride families were found to be common to most or all donors, presenting potential targets for further studies to monitor chemical and physical changes in latent fingermarks over time. Differences in relative peak intensities may be indicative of inter- and intra-donor variability. While this study represents a promising step to obtaining more in-depth information about fingermark composition, it also highlights the complex nature of these traces

Investigation into the performance of physical developer formulations for visualizing latent fingerprints on paper

Latent fingerprints deposited on commercial photocopy paper were treated using various preparations of silver-based physical developer and the results from each were compared to those obtained with the standard formulation used by the Australian Federal Police. Five redox stock solutions were prepared with altered orders of reagent addition, and a further solution prepared with exchanged iron concentrations, to test the robustness of the method. Three redox solutions were prepared with specific reagents omitted to determine the significance of the role played by each in development. One redox solution was prepared using Tween 20 as the non-ionic surfactant to assess its suitability as a replacement for Synperonic N. An acid prewash was also prepared using malic acid as an alternative to maleic acid. Results showed the method to be robust to alterations in reagent addition, but not to significant concentration changes. The presence of all components was found to be desirable for distinguishable development of fingerprint detail. It was additionally found that Tween 20 gave at least equal performance to Synperonic N on recently deposited fingerprints. Finally, the use of malic acid gave equivalent fingerprint development but higher background in comparison to maleic acid

Detecting Change in a Louisiana Gulf Coast Marsh Using Remote Sensing

This study is concerned with detecting change in a Louisiana Gulf Coast marsh, and citing possible causes for the change. The primary objectives are to determine the amount, location and nature of change over a nine year period, utilizing Landsat data. Salinity, precipitation, water level and the distance of change-to-water are examined to determine their contribution to the alteration of this ecosystem.Geograph

Sequencing of a modified oil red O development technique for the detection of latent fingermarks on paper surfaces

A modified detection sequence is presented for the recovery of latent fingermarks on porous substrates. 1,2-Indanedione, Oil Red O (ORO) in propylene glycol, and physical developer (PD) were successfully used to develop recently deposited latent fingermarks when applied in the order given. The incorporation of ORO into the detection sequence increased the number of latent fingermarks that were detected compared to using the standard sequence of 1,2-indanedione followed by PD only

Investigations into the initial composition of latent fingermark lipids by gas chromatography-mass spectrometry

A more comprehensive understanding of the variability of latent fingermark composition is essential to improving current fingermark detection capabilities in an informed manner. Gas chromatography–mass spectrometry was used to examine the composition of the lipid fraction of latent fingermarks collected from a population of over 100 donors. Variations in the appearances of chromatograms from different donors were apparent in the relative peak sizes of compounds including free fatty acids, squalene, cholesterol and wax esters. Principal component analysis was used as an exploratory tool to explore patterns in this variation, but no correlation to donor traits could be discerned. This study also highlights the practical and inherent difficulties in collecting reproducible samples

Fingermark simulants and their inherent problems: A comparison with latent fingermark deposits

Commercially available fingermark simulants werecompared to latent fingermark deposits to assess their efficacy asstandards for a quality control assessment of fingermark developmentreagents. Deposits of the simulants and latent fingermarks were madeon paper substrates and were developed using reagents that targetamino acids (ninhydrin, 1,2-indanedione) and sebaceous secretions(Oil Red O, physical developer). The resulting marks were comparedfor visibility and color. Significant differences were observed betweenthe simulants and latent fingermarks in response to the fingermarkdevelopment reagents. Infrared spectroscopic analysis of the simulantscompared to untreated latent fingermarks revealed differencesin chemical composition. These results indicate that these simulantsare not well suited as quality control standards in forensic laboratoriesand should be used with extreme caution in any form of research intolatent fingermark detection