Importância do sistema de semeadura direta na população microbiana do solo.

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Mitigating the Harm of Public Mass Shooting Incidents Through Situational Crime Prevention

This dissertation used environmental theoretical frameworks to understand how public mass shooting incidents are impacted by aspects of the crime situation and opportunity. Predatory, public shootings perpetrated by individuals with evidence of mass intent were examined in the United States between 1966 and 2019. This project progressed in several distinct steps with discrete aims: (1) establish an open source database of public mass shooting incidents meeting definitional criteria; (2) perform statistical analysis, including latent class analysis, regression modeling, and structural equational modeling to assess research questions; and (3) perform comparative case studies and crime script analysis to assess situational crime prevention failure or success in eight purposively selected cases. Two research questions, guided by pathway to violence literature, rational choice perspective, and situational crime prevention, were examined: (1) can public mass shooting perpetrators be sorted into meaningful classes according to preparatory and warning signs behaviors?; and (2) how do the built environment and situational guardianship structure of the public mass shooting location influence incident casualties and severity outcomes? Results from this mixed methods study indicate that public mass shooting perpetrators fall into three distinct behavioral classes characterized by different probabilities of warning signs behaviors. Next, there is a protective role of holistic situational crime prevention for mitigating harm of public mass shooting incidents. Protective environmental design exerted a contradictory effect on incident outcomes, mediated by perpetrator and victim behaviors during the shooting. Case studies revealed that failure is often due to human error in implementation of established SCP protocols, rather than a lack of SCP protocols. Implications for prevention and harm mitigation are discussed

An Exploration of Youth Experiences in Chatrooms

Internet predation of minors has increasingly become a focus of child abuse research and legislation. Concerns have arisen regarding “online grooming,” the ongoing process during which an adult offender prepares a child for sexual abuse by gaining emotional access to the child through an intimate online relationship. The present study provided one of the first comprehensive examinations of a victim\u27s perspective of online grooming. Participants were 374 male and female college students at a public undergraduate institution who completed an online survey covering demographics, lifestyle factors, and experiences online of sexual solicitation or online grooming. Results showed that approximately 30% (n = 75) of the respondents reported chatting with adult strangers on-line when they were minors, with 66% (n = 49) of those reporting sexual solicitation from adult strangers. Moreover, 53% (n = 40) of those who chatted with adult strangers reported some involvement in an interpersonal online relationship that could be characterized as grooming. Very few respondents reported (12%; n = 8) meeting and engaging in sexual intercourse with an adult from an online chatroom when they were youth. Importantly, open-ended responses revealed that the experience of having sexualized conversations or romantic relationships with adults online has been normalized by children and adolescents. That is, the romantic overtures in these conversations were perceived by participants to be legitimate consensual relationships, even when those relationships led to physical sexual intercourse between an adult and child. The findings from the present study have significant implications for prevention of online sexual grooming by understanding the way in which young Internet users perceive potentially predatory communications and relationships with adults

Short- And long-term results after laparoscopic floppy Nissen fundoplication in elderly versus non-elderly patients

Background: Laparoscopic anti-reflux surgery could be of benefit in a subset of elderly patients with gastroesophageal reflux disease. However, there are few reports that have evaluated the long-term results. This study examined the effects of age on the short- and long-term (for at least 5 years) outcomes after laparoscopic Nissen fundoplication (LNF). Patients and Methods: Patients were divided into four groups as follows: young (18–49); adult (50–69); and elderly (70–84), and very elderly (85–91). The database (recorded prospectively) included operating duration, conversion, intra- and early post-operative complication and late outcomes. Mean follow-up was 14.5 years (range 5–24 years). Results: Five hundred and sixty-nine patients met the inclusion criteria: young n = 219 (38.4%); adult n = 248 (43.5%); elderly n = 91 (16.0%) and very elderly n = 11 (1.9%). Hiatal hernia (type I and III) was significantly less frequent in young and adult patients (P < 0.0001). The operation was significantly longer in elderly and very elderly patients (P < 0.001); the use of drains (P < 0.001) and grafts (P < 0.0001) for hiatal hernia repair was less in young and adult patients. The hospital stay, conversion (5.4%), intra-operative and early post-operative complications were not influenced by age. Dysphagia was evenly distributed among the groups. Forty-eight (8.4%) patients had recurrence: 15 in the young group (6.8%), 18 in the adult group (7.2%), 11 in the elderly group (12%) and 4 in the very elderly group (36.3%) (P < 0.0001). Conclusions: Age does not influence short- and long-term outcomes following LNF. Control of reflux in the elderly is worse than adult patients. Therefore, ageing is a relative contraindication to LNF