Women’s Individual and Relationship-Level Attitudes and Behaviors Regarding Solo Masturbation and Vibrator Use

poster abstractBackground: Both public health and developmental literature emphasize the importance of solo masturbation as one component in healthy sexuality, particularly for women. However, few studies have examined how the context of a woman’s sexual/romantic relationship may impact both her attitudes towards and her frequency of solo masturbation, particularly in terms of vibrator use. Better understanding of this context has important implications for sexual health education and intervention efforts. Methods: Data were drawn from a larger internet-based, cross-sectional survey examining adult men’s and women’s health and life experiences. For the current study, we retained all female participants (N=113; Mean Age=29.37 years [SD=9.91]). Outcome measures included solo masturbation and vibrator use attitudes and behaviors; independent variables were perception of partner's knowledge of and comfort with participant’s masturbation and vibrator use, sexual entitlement, and sexual openness. Descriptive statistics and bivariate correlations, were utilized to describe and understand the relationships among variables of interest (SPSS, v.22.0 (all p<.05). Results: Of the 113 participants, 76.0% (n=85) identified as being in some form of established sexual/romantic relationship. 54.7% (n=52) of participants had ever used a vibrator, while 38.9% (n=37) described themselves as current vibrator users. A majority of participants (62.3%, n=66) indicated that they masturbate a few times per month or more, with 50.0% (n=26) of vibratorusers indicating that they use a vibrator almost every time or every time they masturbate. 42.9% (n=39) of participants described themselves as being completely comfortable with their partner’s masturbation habits, and 59.8% (n=52) described their partner as either somewhat or completely comfortable with the participant’s masturbation. 60.5% (n=55) of participants indicated that they felt either somewhat or completely comfortable discussing masturbation with their partner. 85.7% (n=42) of vibrator-users indicated that their partner knew about their vibrator use, and 66.0% (n=33) felt their partner was either somewhat or completely comfortable with their vibrator use. Considering participants both with and without current partners, greater sense of sexual entitlement was associated with more positive attitudes about masturbation and vibrator use (R=0.758), as well as greater frequency of masturbation (R=0.455). Higher frequency of masturbation also correlated with more positive attitudes about masturbation and vibrator use (R=.381) and greater sexual openness (R=.266). Regarding the relationship context, partner knowledge of vibrator use was positively associated with greater frequency of vibrator use for solo masturbation (R=.361). Greater comfort discussing masturbation with a partner was correlated with more positive perception of partner’s comfort with the participant’s masturbation (R=.389), which in turn was positively associated with greater participant comfort with their partner’s masturbation habits (R=.300). Conclusion: Solo masturbation and vibrator use for masturbation are common among adult women, even when they are in established sexual/romantic relationships. Positive perceptions of a partner’s comfort with masturbation and vibrator use, as well as open sexual communication, may contribute to developing a sex-positive relationship environment that is supportive of women’s solo sex activities. Our findings provide potential avenues for revising existing sexual health and therapeutic interventions for women (with or without a partner)

Kontrolle von Rhizoctonia solani in Kartoffeln mit einer neu entwickelten Reihenapplikationstechnik von suppressiven Komposten

The soil borne pathogen Rhizoctonia solani is of increasing importance since organic seed potatoes are compulsory in organic potato production. No convincing measure to control the disease is available for organic production. The effect of a suppressive compost mixture of organic household and yard waste to control R. solani in potatoes was tested in an organic field trial at the University Kassel in 2006. The compost was directly applied at the seed tuber area. Seed tubers (variety Nicola) naturally infested with black scurf were planted in three infection classes (no, middle and high infection). Compost amendment had a strong impact on symptoms of R. solani on tubers. The reduction of both the infestation of harvested potatoes with black scurf and the rate of tubers with deformations and dry core was significant at final harvest. Although the rate of initial infection of the seed tubers had an impact on tuber health and quality the disease was reduced up to 50% in all infection classes. These promising results en-courage increasing the research on a development of a strip application technique of composts to control the disease

Investigation of dynamic quality changes and optimization of drying parameters of carrots (Daucus carota var. laguna)

The effect of air temperature and sample thickness on the color changes and total carotenoids content of carrot slices was investigated. Temperature, exposure time, and moisture levels significantly affected the dynamic changes of total carotenoids and color. A slow and linear decrease in total carotenoids was observed at higher moisture content until reaching an inflection point at around 0.45 gw/gdm for all temperatures studied. Thereafter, the retention in total carotenoids decreased rapidly. The highest retention for a final product was 66.2% when drying at 60°C while retention was between 42.2 and 51.1% when drying at 50 and 70°C. These changes occurred alongside a noticeable change in color at moisture contents below the inflection point of 0.45 gw/gdm for all drying temperatures. Design of experiment based optimization of the drying process resulted in an ideal temperature of 59.8°C and 3.5 mm slice thickness with the predicted values for La*b*; ΔE of 62.18 ± 5.12, 22.46 ± 1.98, 40.35 ± 6.64, 6.31 ± 4.74; rehydration ratio of 0.48 ± 0.07; and total carotenoids of 163.83 ± 17.38 μg/g or 67.38%, respectively, all at a 95% prediction interval

Progress of the Felsenkeller shallow-underground accelerator for nuclear astrophysics

Low-background experiments with stable ion beams are an important tool for putting the model of stellar hydrogen, helium, and carbon burning on a solid experimental foundation. The pioneering work in this regard has been done by the LUNA collaboration at Gran Sasso, using a 0.4 MV accelerator. In the present contribution, the status of the project for a higher-energy underground accelerator is reviewed. Two tunnels of the Felsenkeller underground site in Dresden, Germany, are currently being refurbished for the installation of a 5 MV high-current Pelletron accelerator. Construction work is on schedule and expected to complete in August 2017. The accelerator will provide intense, 50 uA, beams of 1H+, 4He+, and 12C+ ions, enabling research on astrophysically relevant nuclear reactions with unprecedented sensitivity.Comment: Submitted to the Proceedings of Nuclei in the Cosmos XIV, 19-24 June 2016, Niigata/Japa

Electronic transport coefficients from ab initio simulations and application to dense liquid hydrogen

Using Kubo's linear response theory, we derive expressions for the frequency-dependent electrical conductivity (Kubo-Greenwood formula), thermopower, and thermal conductivity in a strongly correlated electron system. These are evaluated within ab initio molecular dynamics simulations in order to study the thermoelectric transport coefficients in dense liquid hydrogen, especially near the nonmetal-to-metal transition region. We also observe significant deviations from the widely used Wiedemann-Franz law which is strictly valid only for degenerate systems and give an estimate for its valid scope of application towards lower densities

Deterministic Partial Differential Equation Model for Dose Calculation in Electron Radiotherapy

Treatment with high energy ionizing radiation is one of the main methods in modern cancer therapy that is in clinical use. During the last decades, two main approaches to dose calculation were used, Monte Carlo simulations and semi-empirical models based on Fermi-Eyges theory. A third way to dose calculation has only recently attracted attention in the medical physics community. This approach is based on the deterministic kinetic equations of radiative transfer. Starting from these, we derive a macroscopic partial differential equation model for electron transport in tissue. This model involves an angular closure in the phase space. It is exact for the free-streaming and the isotropic regime. We solve it numerically by a newly developed HLLC scheme based on [BerCharDub], that exactly preserves key properties of the analytical solution on the discrete level. Several numerical results for test cases from the medical physics literature are presented.Comment: 20 pages, 7 figure

Std fimbriae-fucose interaction increases Salmonella-induced intestinal inflammation and prolongs colonization

Author summary The intestinal epithelium is a crucial biological interface, interacting with both commensal and pathogenic microorganisms. It’s lined with heavily glycosylated proteins and glycolipids which can act as both attachment sites and energy sources for intestinal bacteria. Fut2, the enzyme governing epithelial α1,2-fucosylation, has been implicated in the interaction between microbes and intestinal epithelial cells. Salmonella is one of the most important bacterial gastrointestinal pathogens affecting millions of people worldwide. Salmonella possesses fimbrial and non-fimbrial adhesins which can be used to adhere to host cells. Here we show that Salmonella expresses Std fimbriae in the gastrointestinal tract in vivo and exploit Std fimbriae to bind fucosylated structures in the mucus and on the intestinal epithelium. Furthermore, we demonstrate that the Std fimbriae-fucose interaction is necessary for bacterial colonization of the intestine and for triggering intestinal inflammation. These data lend new insights into bacterial adhesion-epithelial interactions which are essential for bacterial pathogenesis and key factors in determining tissue tropism and host susceptibility to infectious disease

Metallic liquid hydrogen and likely Al2O3 metallic glass

Dynamic compression has been used to synthesize liquid metallic hydrogen at 140 GPa (1.4 million bar) and experimental data and theory predict Al2O3 might be a metallic glass at ~300 GPa. The mechanism of metallization in both cases is probably a Mott-like transition. The strength of sapphire causes shock dissipation to be split differently in the strong solid and soft fluid. Once the 4.5-eV H-H and Al-O bonds are broken at sufficiently high pressures in liquid H2 and in sapphire (single-crystal Al2O3), electrons are delocalized, which leads to formation of energy bands in fluid H and probably in amorphous Al2O3. The high strength of sapphire causes shock dissipation to be absorbed primarily in entropy up to ~400 GPa, which also causes the 300-K isotherm and Hugoniot to be virtually coincident in this pressure range. Above ~400 GPa shock dissipation must go primarily into temperature, which is observed experimentally as a rapid increase in shock pressure above ~400 GPa. The metallization of glassy Al2O3, if verified, is expected to be general in strong oxide insulators. Implications for Super Earths are discussed.Comment: 8 pages, 5 figures, 14th Liquid and Amorphous Metals Conference, Rome 201