Experimental determination of pressure drop and flow characteristics of dilute gas-solid suspensions

Loading ratio, glass particle size, and air Reynolds number effects on pressure drop and flow characteristics of air-solid suspension in turbulent pipe flo

An S-FSCW Based Multi-Channel Reader System for Beamforming Applications using Surface Acoustic Wave Sensors

Interrogating multiple surface acoustic wave (SAW) sensors located within the same radar beam require techniques to separate the multiple superposing SAW sensor responses. The presented multi-channel reader features four parallel transceiver channels, which are based on the switched frequency-stepped continuous-wave principle and high-speed parallelized baseband electronics. Thus classical beamforming applications including angle of arrival measurement of single SAW tags and the angular separation of multiple SAW sensors are presented and compared to a multiple-input multiple-output (MIMO) approach. Due to the larger virtual array in the MIMO approach a larger aperture can be synthesized, which leads to significantly better angular separation results. The level analysis for the given system is verified by baseband-power measurements at different readout distances, considering the hardware parameters as well as the free-space propagation aspects. Finally measurements assess the maximum interrogation distance for the system

‘Spunkles’, Donors, and Fathers: Men, Trans/Masculine and Non-Binary People’s Accounts of Sperm Donors and their Relationships to Children

Across the world, growing numbers of men, trans/masculine and non-binary people are bearing children, some of whom utilise known donor sperm in order to conceive. How this diverse population understand the role of known donors, both in the lead up to conception and in terms of the lives of children conceived of their donations has, to date, received little attention. This chapter focuses on a subsample of nine individuals drawn from a larger international study of 51 men, trans/masculine or non-binary who were gestational parents. The nine participants whose narratives are examined in this chapter all used known donor sperm to conceive, and in their interviews discussed their thoughts about the role of donors in their children’s lives, exploring topics such identifying potential donors, the incorporation (or not) of donors into existing kinship narratives, and the need to create opportunities for children to negotiate their own relationships with donors in the future. The findings highlight the potentially unique social scripting needs of men, trans/masculine and non-binary people who conceive using donor sperm. The chapter concludes by providing suggestions for how this diverse group of people may be assisted in developing scripts for disclosing donor conception to their children, and for negotiating the role of donors in children’s lives in the context of legislatures where such disclosure is required

Embodied Experiences of Trans Pregnancy

Drawing on interview data from the international project Trans Pregnancy: An International Exploration of Transmasculine Practices of Reproduction this article explores embodied experiences of male, trans/masculine and non-binary pregnancy. Moving beyond the spectacle of the ‘pregnant’ man, our analysis builds on existing literature on trans health and embodiment in order to develop a deeper understanding of the lived, bodily complexities of trans pregnancy. We consider the strategies men, trans/masculine and non-binary folks engage in to manage gender presentation during pregnancy and the degree to which pregnancy disrupts the ability to control the presentation of gender. Our analysis contributes to the deconstruction of normative readings of the relationship between gender and the body and highlights the need for improvements in trans and non-binary reproductive healthcare

Trans Parenting

This chapter explores some of the broad contours of trans parenting, covering areas such as barriers to parenting for trans people, decision making about parenting, conception, pregnancy and birth, and parent-child relationships. Each section uses Ansara and colleague’s (Ansara, 2015; Ansara and Hegarty, 2014; Riggs, Ansara, and Treharne, 2015) cisgenderism framework to highlight key challenges faced by trans parents, although attention is also paid to the agency enacted by, and the positive parenting experiences of, trans people. Additional theoretical concepts are introduced throughout to provide additional depth to the exploration of the topic of trans parenting

Men, Trans/Masculine and Non-Binary People’s Views About Pregnancy

Drawing on focus groups conducted with 18 young men, trans/masculine, and non-binary people across three countries, in this chapter we argue that essentialist beliefs about reproduction very much impact the experiences of this diverse group of young people. In the sections that follow we first provide an overview of the limited body of literature in this area. We then briefly describe the background to our project, before presenting the findings of our thematic analysis of the focus group data. We conclude the chapter by exploring what our findings mean for a trans reproductive justice approach

Men, trans/masculine, and non-binary people negotiating conception: Normative resistance and inventive pragmatism

Background: Growing numbers of men, trans/masculine, and non-binary people are undertaking pregnancies, yet relatively little is known about the experiences of this diverse population in regard to conception. Aims: This study sought to examine men’s, trans/masculine, and non-binary people’s experiences of pregnancy, including conception. Methods: Interviews were conducted with 51 men, trans/masculine, and non-binary people who were gestational parents living in Australia, Canada, the European Union (including the United Kingdom), and the United States. Thematic analysis was undertaken, focusing on accounts of conception. Pfeffer’s (2012) conceptual frameworks of normative resistance and inventive pragmatism were used as an analytic tool. Results: Themes developed focused on: 1) choosing a clinic donor, 2) kinship with donors, 3) conceiving via intercourse with a partner, 4) negotiating receipt of donor sperm, 5) challenges associated with known donors, 6) challenges associated with fertility clinics, and 7) experiences of conception. Discussion: The forms of normative resistance and inventive pragmatism identified suggest that men, trans/masculine, and non-binary people who are gestational parents seek to normalize their experiences of conception, while also acknowledging the specific challenges they face

Temperature dependence of the electron spin g factor in GaAs

The temperature dependence of the electron spin $g$ factor in GaAs is investigated experimentally and theoretically. Experimentally, the $g$ factor was measured using time-resolved Faraday rotation due to Larmor precession of electron spins in the temperature range between 4.5 K and 190 K. The experiment shows an almost linear increase of the $g$ value with the temperature. This result is in good agreement with other measurements based on photoluminescence quantum beats and time-resolved Kerr rotation up to room temperature. The experimental data are described theoretically taking into account a diminishing fundamental energy gap in GaAs due to lattice thermal dilatation and nonparabolicity of the conduction band calculated using a five-level kp model. At higher temperatures electrons populate higher Landau levels and the average $g$ factor is obtained from a summation over many levels. A very good description of the experimental data is obtained indicating that the observed increase of the spin $g$ factor with the temperature is predominantly due to band's nonparabolicity.Comment: 6 pages 4 figure

Medical uncertainty and reproduction of the “normal”: Decision-making around testosterone therapy in transgender pregnancy

In this work, we draw upon in-depth interview and focus group data from a three-year international study of 70 trans people (residing across Australia, Canada, the European Union, United Kingdom, and the United States) about their intentions and experiences around pregnancy, as well as 22 health care providers (practicing across Australia, Canada, the European Union, the United Kingdom, and the United States) with self-identified experience working with trans patients and pregnancy along a diverse cross-section of specialty areas (e.g., psychotherapists, general practitioners, endocrinologists, midwives, lactation consultants, OBGYNs, fertility specialists). The central motivating questions guiding the present work are: 1) For trans people who are taking testosterone, what is the medical advice and guidance around stopping or pausing testosterone therapy to become pregnant, throughout pregnancy, and during the postpartum period (particularly in the context of chestfeeding/breastfeeding); 2) What is the evidence base in the medical empirical literature for this guidance; and 3) How do trans people respond to this guidance

Transnormativity in the psy disciplines: Constructing pathology in the Diagnostic and Statistical Manual and Standards of Care

The psy disciplines (i.e., psychiatry, psychology, psychoanalysis, and psychotherapy) have played a significant role in shaping understandings of transgender people’s lives in ways that are transnormative (i.e., by emphasizing one particular account of what it means to be transgender). This paper documents 1) how the rise of the psy disciplines created opportunities for transgender people to access treatment (but that such access often required tacit acceptance of transnormativity), and 2) how transgender people have resisted transnormative accounts within the psy disciplines. More specifically, this paper explores how both the American Psychiatric Association’s Diagnostic and Statistical Manual, and what is now the World Professional Association for Transgender Health’s Standards of Care, have often enshrined highly regulatory accounts of transgender people’s lives, while also changing over time, in part due to the contributions of transgender people. The paper concludes by considering recent contributions by transgender people in terms of the use of informed consent models of care and clinical research, and highlights the ongoing marginalization of transgender people in terms of access to ethical, trans-competent care