Counterintuitive prey strategies against predators with finite budgets: protection heterogeneity among sites matters more than their number.

Combining the search and pursuit aspects of predator-prey interactions into a single game, where the payoff to the Searcher (predator) is the probability of finding and capturing the Hider (prey) within a fixed number of searches was proposed by Gal and Casas ( , 20140062 (doi:10.1098/rsif.2014.

Why fertility preservation rates of transgender men are much lower than those of transgender women.

Research Question: What are the fertility preservation rates of transgender women and transgender men, and what are the factors that affect their decision-making?

Design: This prospective study included 97 transgender women and 91 transgender men referred to the Gender Clinic of the study medical centre's Endocrinology Institute and to the Gan Meir Community Health Care Centre. The responders completed a 28-item questionnaire during 2018.

Results: Most of the transgender women and transgender men wished to parent a child (67.

Transgender men's preferences when choosing obstetricians and gynecologists.

Background: Transgender men are a marginalized population with unique health care needs. However, their usage of health services is low because of considerable discrimination. A major factor in their avoidance is patient-provider interactions.

Social Distancing, Gathering, Search Games: Mobile Agents on Simple Networks.

During epidemics, the population is asked to socially distance, with pairs of individuals keeping two meters apart. We model this as a new optimization problem by considering a team of agents placed on the nodes of a network. Their common aim is to achieve pairwise graph distances of at least ,  a state we call .

Reimagining Youth Justice: How the Dual Crises of COVID-19 and Racial Injustice Inform Judicial Policymaking and Reform.

The COVID-19 pandemic and the rejuvenated movement for racial justice in 2020 have presented an opportunity to reimagine the roles, practices, and policies of juvenile and family court systems actors. In order to capture contemporary ideas about judicial practice and policy reforms, semi-structured interviews were conducted with Hon. Edwina Mendelson, Deputy Chief Administrative Judge for the Office of Justice Initiatives in New York State, and Hon.

The effects of time and temperature on umbilical cord gas analysis.

Objective: Our objective was to evaluate the effects of time and temperature on umbilical-cord blood analysis.

Methods: This prospective study included the term spontaneous vaginal deliveries. One venous and seven arterial samples were drawn from each umbilical cord within 5 min from delivery.

Chromosomal Microarray Evaluation of Fetal Ventriculomegaly.

Background: Fetal ventriculomegaly is one of the more common fetal anomalies detected during prenatal screening.

Objectives: To assess the rate of genetic aberrations as the cause for ventriculomegaly in these fetuses.

Methods: A historic cohort study was conducted on 164 fetuses with sonographic diagnosis of ventriculomegaly.

Cardiac Function and Hemodynamic Changes during Minimally Invasive Hysterectomy with Pneumoperitoneum and Steep Trendelenburg Position for Patients with Endometrial Cancer Who Are Obese.

Study Objective: To assess the effect of carbon dioxide (CO) pneumoperitoneum and steep Trendelenburg position on patients' cardiac function and hemodynamics during minimally invasive staging surgery for endometrial cancer.

Design: Single-center prospective longitudinal study.

Setting: University-affiliated tertiary hospital.

Detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in vaginal swabs of women with acute SARS-CoV-2 infection: a prospective study.

Objective: To determine whether severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is present in the vaginal secretions of both reproductive-aged and postmenopausal women during acute SARS-CoV-2 infection.

Design: Prospective study.

Setting: A single tertiary, university-affiliated medical centre in Israel.

A stochastic game model of searching predators and hiding prey.

When the spatial density of both prey and predators is very low, the problem they face may be modelled as a two-person game (called a 'search game') between one member of each type. Following recent models of search and pursuit, we assume the prey has a fixed number of heterogeneous 'hiding' places (for example, ice holes for a seal to breathe) and that the predator (maybe polar bear) has the time or energy to search a fixed number of these. If he searches the actual hiding location and also successfully pursues the prey there, he wins the game.

The ovarian response in fragile X patients and premutation carriers undergoing IVF-PGD: reappraisal.

Study Question: What is the association between the ovarian response and the number of CGG repeats among full mutation and premutation carriers of fragile X (FMR1), undergoing controlled ovarian hyperstimulation (COH) for PGD?

Summary Answer: Ovarian response was normal in full mutation patients but decreased in premutation carriers, although the number of repeats was not statistically significantly associated with the number of oocytes retrieved.

What Is Known Already: There is inconsistent data in the literature regarding ovarian response in FMR1 carriers. Studies exploring the ovarian response of full mutation patients are lacking.

Total bilateral salpingectomy versus partial bilateral salpingectomy for permanent sterilization during cesarean delivery.

Purpose: Sterilization via bilateral total salpingectomy is slowly replacing partial salpingectomy, as it is believed to decrease the incidence of ovarian cancer. Our objective was to compare short-term intra and post-operative complication rates of bilateral total salpingectomy versus partial salpingectomy performed during the course of a cesarean delivery.

Methods: A large series of tubal sterilizations during cesarean sections were studied in a single tertiary medical center between 1/2014 and 8/2016 before and after a policy change was made, switching from partial salpingectomy to total salpingectomy.

Prey should hide more randomly when a predator attacks more persistently.

When being searched for and then (if found) pursued by a predator, a prey animal has a choice between choosing very randomly among hiding locations so as to be hard to find or alternatively choosing a location from which it is more likely to successfully flee if found. That is, the prey can choose to be hard to find or hard to catch, if found. In our model, capture of prey requires both finding it and successfully pursuing it.

Equilibrium population dynamics when mating is by mutual choice based on age.

We consider a steady state model of mutual mate choice in which an individual's mate preferences depend on his/her age, and the preferences are over the ages of prospective mates of the opposite sex. We present a discrete time (and age) model corresponding to successive mating seasons. Males are fertile for m periods (corresponding to 'age' i=1 to m) and females for n≤m periods (they have ages j=1 to n), which is all that distinguishes the sexes.

A search game model of the scatter hoarder's problem.

Scatter hoarders are animals (e.g. squirrels) who cache food (nuts) over a number of sites for later collection.

Ambush frequency should increase over time during optimal predator search for prey.

We advance and apply the mathematical theory of search games to model the problem faced by a predator searching for prey. Two search modes are available: ambush and cruising search. Some species can adopt either mode, with their choice at a given time traditionally explained in terms of varying habitat and physiological conditions.

Strategic mating with common preferences.

We present a two-sided search model in which individuals from two groups (males and females, employers and workers) would like to form a long-term relationship with a highly ranked individual of the other group, but are limited to individuals who they randomly encounter and to those who also accept them. This article extends the research program, begun in Alpern and Reyniers [1999. J.

Strategic mating with homotypic preferences.

We determine equilibrium acceptance strategies in a class of multi-period mating games where individuals prefer opposite sex partners with a close parameter type (one-dimensional homotypic preferences). In each period unmated individuals are randomly paired. They form a couple (and leave the pool) if each accepts the other; otherwise they continue into future periods.