University of New Hampshire

About: University of New Hampshire is a education organization based out in Durham, New Hampshire, United States. It is known for research contribution in the topics: Population & Solar wind. The organization has 9379 authors who have published 24025 publications receiving 1020112 citations. The organization is also known as: UNH.

Physical Dating Violence, Sexual Violence, and Unwanted Pursuit Victimization A Comparison of Incidence Rates Among Sexual-Minority and Heterosexual College Students

Abstract: The purpose of this study was to estimate the 6-month incidence rates of sexual assault, physical dating violence (DV), and unwanted pursuit (e.g., stalking) victimization among sexual-minority (i.e., individuals with any same-sex sexual experiences) college students with comparison data from non-sexual-minority (i.e., individuals with only heterosexual sexual experiences) college students. Participants (N = 6,030) were primarily Caucasian (92.7%) and non-sexual-minority (82.3%). Compared with non-sexual-minority students (N-SMS; n = 4,961), sexual-minority students (SMS; n = 1,069) reported significantly higher 6-month incidence rates of physical DV (SMS: 30.3%; N-SMS: 18.5%), sexual assault (SMS: 24.3%; N-SMS: 11.0%), and unwanted pursuit (SMS: 53.1%; N-SMS: 36.0%) victimization. We also explored the moderating role of gender and found that female SMS reported significantly higher rates of physical DV than female N-SMS, whereas male SMS and male N-SMS reported similar rates of physical DV. Gender did not moderate the relationship between sexual-minority status and victimization experiences for either unwanted pursuit or sexual victimization. These findings underscore the alarmingly high rates of interpersonal victimization among SMS and the critical need for research to better understand the explanatory factors that place SMS at increased risk for interpersonal victimization.

Coarse woody debris in undisturbed and logged forests in the eastern Brazilian Amazon

Abstract: Coarse woody debris (CWD) is an important component of the carbon cycle in tropical forests. We measured the volume and density of fallen CWD at two sites, Cauaxi and Tapajos in the Eastern Amazon. At both sites we studied undisturbed forests (UFs) and logged forests 1 year after harvest. Conventional logging (CL) and reduced impact logging (RIL) were used for management on areas where the geometric volumes of logs harvested was about 25-30 m 3 ha � 1 . Density for five classes of fallen CWD for large material (410 cm diameter) ranged from 0.71 to 0.28 Mg m � 3 depending upon the degree of decomposition. Density of wood within large fallen logs varied with position relative to the ground and with distance from the center of the log. Densities for materials with diameters from 2 to 5 and 5 to 10 cm were 0.36 and 0.45 Mg m � 3 , respectively. The average mass ( � SE) of fallen CWD at Cauaxi was 55.2 (4.7), 74.7 (0.6), and 107.8 (10.5) Mg ha � 1 for duplicate UF, RIL, and CL sites, respectively. At Tapajos, the average mass of fallen CWD was 50.7 (1.1) Mg ha � 1 for UF and 76.2 (10.2) Mg ha � 1 for RIL for duplicate sites compared with 282 Mg ha � 1 for live aboveground biomass. Small- and medium-sized material (o10 cm dia.) accounted for 8-18% of the total fallen CWD mass. The large amount of fallen CWD at these UF sites relative to standing aboveground biomass suggests either that the forests have recently been subjected to a pulse of high mortality or that they normally suffer a high mortality rate in the range of 0.03 per year. Accounting for background CWD in UF, CL management produced 2.7 times as much CWD as RIL management. Excess CWD at logging sites would generate a substantial CO2 emission given the high rates of decay in moist tropical forests.

A major solar eruptive event in July 2012: Defining extreme space weather scenarios

Abstract: A key goal for space weather studies is to define severe and extreme conditions that might plausibly afflict human technology. On 23 July 2012, solar active region 1520 (approx. 141 deg W heliographic longitude) gave rise to a powerful coronal mass ejection (CME) with an initial speed that was determined to be 2500+/-500 km/s. The eruption was directed away from Earth toward 125 deg W longitude. STEREO-A sensors detected the CME arrival only about 19 h later and made in situ measurements of the solar wind and interplanetary magnetic field. In this paper, we address the question of what would have happened if this powerful interplanetary event had been Earthward directed. Using a well-proven geomagnetic storm forecast model, we find that the 23-24 July event would certainly have produced a geomagnetic storm that was comparable to the largest events of the twentieth century (Dst approx. - 500 nT). Using plausible assumptions about seasonal and time-of-day orientation of the Earth's magnetic dipole, the most extreme modeled value of storm-time disturbance would have been Dst= - 1182 nT. This is considerably larger than estimates for the famous Carrington storm of 1859. This finding has far reaching implications because it demonstrates that extreme space weather conditions such as those during March of 1989 or September of 1859 can happen even during a modest solar activity cycle such as the one presently underway. We argue that this extreme event should immediately be employed by the space weather community to model severe space weather effects on technological systems such as the electric power grid.