Numerical study of Zika model as a mosquito-borne virus with non-singular fractional derivative

Zika virus infection, which is closely related to dengue, is becoming a global threat to human society. The transmission of the Zika virus from one human to another is spread by bites of Aedes mosquitoes. Recent studies also reveal the fact that the Zika virus can be transmitted by sexual interaction. In this paper, we use the fractional derivative with Mittag–Leffler non-singular kernel to study Zika virus transmission dynamics. This fractional is also known as the Atangana–Baleanu Caputo (ABC) derivative which is employed for the resulting system of ordinary differential equations. We investigate the proposed Zika virus model by using the Legendre spectral method. The model parameters are estimated and validated numerically by investigating the effect of fractional order exponent on various cases such as Susceptible human, infected human, asymptomatic carrier, exposed human, and recovered human. Numerical results obtained with the proposed method have been compared with exact solutions, showing in all parameters a very satisfactory agreement.

Sexual Interaction in Digital Contexts and Its Implications for Sexual Health: A Conceptual Analysis

Based on its prevalence, there is an urgent need to better understand the mechanisms, opportunities and risks of sexual interaction in digital contexts (SIDC) that are related with sexual arousal. While there is a growing body of literature on SIDC, there is also a lack of conceptual clarity and classification. Therefore, based on a conceptual analysis, we propose to distinguish between sexual interaction (1) through, (2) via, and (3) with digital technologies. (1) Sexual interactions through digital technologies are face-to-face sexual interactions that (a) have been started digitally (e.g., people initiating face-to-face sexual encounters through adult dating apps) or (b) are accompanied by digital technology (e.g., couples augmenting their face-to-face sexual encounters through filming themselves during the act and publishing the amateur pornography online). (2) Sexual interactions via digital technology are technology-mediated interpersonal sexual interactions (e.g., via text chat: cybersex; via smartphone: sexting; via webcam: webcam sex/camming). (3) Sexual interactions with digital technology occur when the technology itself has the role of an interaction partner (e.g., sexual interaction with a sex robot or with a media persona in pornography). The three types of SIDC and their respective subtypes are explained and backed up with empirical studies that are grouped according to two major mediators: consent and commerce. Regarding the causes and consequences of the three types of SIDC we suggest a classification that entails biological, psychological, social, economic, and technological factors. Regarding implications of SIDC we suggest to focus on both opportunities and risks for sexual health. The proposed conceptual framework of SIDC is meant to inform future research.

“Blurring the Line”: Intoxication, Gender, Consent, and Sexual Encounters Among Young Adults

Social concern about sexual practices and sexual consent among young adults has increased significantly in recent years, and intoxication has often played a key role in such debates. While many studies have long suggested that alcohol plays a role in facilitating (casual) sexual encounters, intoxication has largely either been conceptualized as a risk factor, or researchers have focused on the pharmacological effects of alcohol on behaviors associated with sexual interaction and consent. To date little work has explored how young adults define and negotiate acceptable and unacceptable levels of intoxication during sexual encounters, nor the ways in which different levels of intoxication influence gendered sexual scripts and meanings of consent. This paper explores the latter two research questions using data from 145 in-depth, qualitative interviews with cisgender, heterosexual young adults ages 18–25 in the San Francisco Bay Area. In examining these interview data, by exploring the relationship between intoxication and sexual consent, and the ways in which gender plays out in notions of acceptable and unacceptable intoxicated sexual encounters, we highlight how different levels of intoxication signal different sexual scripts. Narratives about sexual encounters at low levels of intoxication highlighted the role of intoxication in achieving sexual sociability, but they also relied on the notion that intoxicated consent was dependent on the social relationship between the partners outside drinking contexts. Narratives about sexual encounters in heavy drinking situations were more explicitly gendered, often in keeping with traditionally gendered sexual scripts. In general we found that when men discussed their own levels of intoxication, their narratives were more focused on sexual performance and low status sex partners, while women’s and some men’s narratives about women’s levels of intoxication were focused on women’s consent, safety, and respectability. Finally, some participants rely on “consent as a contract” and “intoxication parity”—the idea that potential sexual partners should be equally intoxicated—to handle relations of power in interpersonal sexual scripts. Since these notions are sometimes deployed strategically, we suggest that they may serve to “black-box” gendered inequalities in power between the parties involved.

Modeling and Sensitivity Analysis of Dynamical Transmission of Lassa Fever

Lassa fever is an acute viral disease which occurs across West Africa regions. In view of this a non-linear deterministic model was considered to study dynamics spread of Lassa fever. Existence and uniqueness of the model were determined and the basic reproduction number of the model was computed using next-generation matrix, and sensitivity analysis of the model was performed and shows that the most sensitive parameters to the dynamical spread of Lassa fever are human birth rate bH, followed by average number of female partners acquired by susceptible male c2, and transmission rate resulting from sexual interaction between infected male and susceptible female h2 have the highest values. It concludes that average number of female partners acquired by susceptible male and sexual transmission rate between the infected male and susceptible female should be reduced. Keywords: Existence and Uniqueness, disease free equilibrium, basic reproduction numbers and sensitivity analysis.

Quality of Marital Relationship and Sexual Interaction in Couples With Sexual Dysfunction: An Exploratory Study From India

Background: Sexual dysfunction and marital intimacy and quality are found to have a reciprocal relationship. Examining this relationship in couples seeking help for sexual dysfunctions in the cultural context of India is worthwhile. Aim: This study aims to explore the nature of sexual functioning, sexual interaction, sexual communication, and marital intimacy and quality in couples with sexual dysfunction. Further, relationship between the above variables is also examined. Methods: A cross-sectional, single-group exploratory design was adopted. A sample of 155 married heterosexual individuals, with a clinical diagnosis of sexual dysfunction in either of the spouses, was included in the study. The tools used included MINI neuropsychiatric interview, Marital Quality Scale, Marital Intimacy Questionnaire, Dyadic Sexual Communication Scale, and Sexual Interaction Inventory. Results: Erectile dysfunction and premature ejaculation in men and hypoactive sexual desire disorder in women were the most common sexual dysfunctions. Majority of the sample were young adults. About 82% of the sample had moderate-to-severe levels of marital distress. Mood disorder was the most common psychiatric disorder reported in the sample. High levels of intimacy problems were seen with no significant gender differences in the overall marital quality or intimacy. Difficulty in the overall sexual interactions was found; however, higher levels of dissatisfaction with the frequency of sex and lower self-acceptance was reported by men compared to women. Significant interrelationships were found between marital quality and intimacy, sexual interaction, and sexual communication. Conclusions: Sexual dysfunctions and marital distress are closely related. Sexual interaction and sexual communication play a significant role in marital quality and intimacy.

Rapid changes in brain estrogen concentration during male sexual behavior are site and stimulus specific

Classically, estrogens regulate male sexual behavior through effects initiated in the nucleus. However, neuroestrogens, i.e., estrogens locally produced in the brain, can act within minutes via membrane-initiated events. In male quail, rapid changes in brain aromatase activity occur after exposure to sexual stimuli. We report here that local extracellular estrogen concentrations measured by in vivo microdialysis increase during sexual interactions in a brain site- and stimulus-specific manner. Indeed, estrogen concentrations rose within 10 min of the initiation of sexual interaction with a female in the medial preoptic nucleus only, while visual access to a female led to an increase in estrogen concentrations only in the bed nucleus of the stria terminalis. These are the fastest fluctuations in local estrogen concentrations ever observed in the vertebrate brain. Their site and stimulus specificity strongly confirm the neuromodulatory function of neuroestrogens on behavior.

Four Problems in Sexting Research and Their Solutions

Despite over 10 years of research, we still know very little about people’s sexting behaviours and experiences. Our limited and, at times, conflicting knowledge about sexting is due to re-searchers’ use of inconsistent conceptual definitions of sexting, dubious measurement practices, and atheoretical research designs. In this article, we provide an overview of the history of sex-ting research and describe how researchers have contributed to the ‘moral panic’ narrative that continues to surround popular media discourse about sexting. We identify four key problems that still plague sexting research today: (1) imprudent focus on the medium, (2) inconsistent conceptual definitions, (3) poor measurement practices, and (4) a lack of theoretical frameworks. We describe and expand on solutions to address each of these problems. In particular, we focus on the need to shift empirical attention away from sexting and towards the behavioural domain of technology-mediated sexual interaction. We believe that the implementation of these solu-tions will lead to valid and sustainable knowledge development on technology-mediated sexual interactions, including sexting.

“Progressive” Criminalization? A Sociological and Criminological Analysis Based on the German “No Means No” Provision

The “no means no” model has been applied in Germany since November 10, 2016. Its introduction has considerably extended the scope of criminalized forms of sexual interaction. This Article examines the criminal policy discourse that gave rise to it and the question of whether the new provisions have led to the changes in the practices of criminal prosecution proclaimed in advance. The results will be critically assessed. The new legislation relating to sexual offenses was also shaped on the initiative of groups perceiving themselves as emancipatory, and in the understanding of these groups, the “no means no” provision acts as “progressive” criminalization. Yet, aside from the fact that the associated expectations have hardly been met as of yet, this movement would have to resolve an essential question: Is penal law compatible with a “progressive” social policy they claim to stand for at all, and if so, what conditions does it have to meet?

From hooking up to staying in? Women negotiating appropriate sexuality in nightlife with age

While much research has explored contemporary constructions of young women’s sexuality, few studies have been sensitive to how age influences women’s sexuality in the context of mainstream nightlife. Drawing on sexual scripting theory, I investigate how 19 Norwegian women (ages 27–34 years) draw on and negotiate cultural scripts when making sense of their nightlife experiences with age. I found that nightlife was an increasingly difficult space to occupy, and that participating could cause tension with the women’s understandings of themselves, their behaviours and their desires in nightlife. While age-related scripts allowed the participants to criticise gender inequality in sexual interaction in nightlife, they simultaneously obscured how gender inequality in nightlife persisted in new forms with age.

Unsolicited Pics and Sexual Scripts: Gender and Relationship Context of Compliant and Non-consensual Technology-Mediated Sexual Interactions

Technology-mediated sexual interaction (TMSI) refers to any partnered interaction that involves sending or receiving self-created, sexually explicit content using communication technology (e. g., sexting, cybersex). Most research on TMSI assumes that experiences are desired and consensual. However, it is likely that some people do not desire all their TMSI experiences but consent to them anyways (compliance), or experience non-consensual TMSIs. People also engage in TMSIs with different types of partners. According to the traditional sexual script (TSS), other-gender attracted women and men's non-consensual TMSI experiences should differ overall and depending on the relationship context of the experience. The goal of this study was to examine the role of sexual scripts in other-gender attracted women and men's non-consensual and compliant TMSI experiences with committed romantic partners (CRPs), known non-partners (KNPs), and strangers (Ss). Women (n = 331) and men (n = 120) completed an online survey with questions about lifetime prevalence of experiencing seven types of compliant and non-consensual TMSIs in each relationship context. Results of mixed ANOVAs revealed significant interactions: overall, more participants reported compliant TMSI with CRPs. More women than men had received a non-consensual TMSI from someone they were not in a committed relationship with, and more men than women reported sending non-consensual TMSIs to a stranger. Tests of unpaired proportions suggested that the prevalence of sending and receiving non-consensual TMSIs was discordant in the KNP and S contexts: both women and men received more non-consensual TMSIs from KNPs and Ss than the other-gender reported sending. Our findings suggest that gendered sexual scripts are evident in some, but not all, aspect of other-gender attracted women and men's compliant and non-consensual TMSI experiences.