Controls on the seasonal exchange of CH3Br in temperate peatlands

Measurements of CH3Br exchange at two New Hampshire peatlands (Sallie\u27s Fen and Angie\u27s Bog) indicate that net flux from these ecosystems is the sum of competing production and consumption processes. Net CH3Br fluxes were highly variable and ranged from net emission to net uptake between locations within a single peatland. At Sallie\u27s Fen, net CH3Br flux exhibited positive correlations with peat temperature and air temperature during all seasons sampled, but these relationships were not observed at Angie\u27s Bog where flux varied according to microtopography. The major CH3Br production process at Sallie\u27s Fen appeared dependent on aerobic conditions within the peat, while CH3Br production at Angie\u27s Bog was favored by anaerobic conditions. There was evidence of aerobic microbial consumption of CH3Br within the peat at both sites. In a vegetation removal experiment conducted at Sallie\u27s Fen with dynamic chambers, all collars exhibited net consumption of CH3Br. Net CH3Br flux had a negative correlation with surface temperature and a positive correlation with water level in collars with all vegetation clipped consistent with aerobic microbial consumption. Vegetated collars showed positive correlations between net CH3Br flux and air temperature. A positive correlation between net CH3Br flux and surface temperature was also observed in collars in which all vegetation except Sphagnum spp. were clipped. These correlations are consistent with seasonal relationships observed in 1998, 1999, and 2000 and suggest that plants and/or fungi are possible sources of CH3Br in peatlands. Estimates of production and consumption made on two occasions at Sallie\u27s Fen suggest that peatlands have lower rates of CH3Br consumption compared to upland ecosystems, but a close balance between production and consumption rates may allow these wetlands to act as either a net source or sink for this gas

Production of methyl bromide in a temperate forest soil

Field enclosure measurements of a temperate forest soil show net uptake of ambient methyl bromide (CH3Br), an important trace gas in both tropospheric and stratospheric ozone cycling. The net flux for 1999 was estimated to be −168 ± 72 μg CH3Br m−2 (negative indicates loss from the atmosphere). Individual enclosure flux measurements ranged from −4.0 to +3.3 μg CH3Br m−2 d−1. Soil consumption of CH3Br was estimated from laboratory soil incubations. Production of CH3Br was calculated as the difference between net flux and predicted consumption. Fungi could be responsible for the production of CH3Br in this temperate forest soil

The Heartbeat of Na’a: Documenting One School’s Blackfoot Cultural Learning Journey

In June 2019, students at an elementary school presented a Blackfoot/English opera and also wrote, illustrated and published Blackfoot/English books to showcase their 18-month-long Blackfoot learning journey. This collaborative story cannot be told in isolation by the researcher/designer alone. Together with the Elder who guided the work and the school principal, we will share the heart of this journey and the impact that this has had on pedagogy, school culture and relationships. Findings from this ethnographic study (Lassiter, 2005; Rappaport, 2008) within an Indigenous research paradigm (Chilisa, 2012; Donald, 2016; Wilson, 2008) highlight how wisdom and stories that are part of the land and how intentional and nurtured relationships with an Elder, with each other and with the animals led to a deeper appreciation of local place. It also created a stronger sense of engagement and belonging within the school for teachers and students. Within the conventional, privileged space of an opera, we created an open, ethical space that invited all students to thrive and participate (Ermine, 2007). Findings point to increased engagement by marginalized students in the land-based experiences, in the preparations for the opera and the book writing, and also in the opera performance itself. With video clips of the opera and samples of the books to lift our stories, this presentation aims to inspire action in the collective work of education for reconciliation. We see this journey as a gift to share with the world so that educators and leaders can create their own meaningful action across different contexts

Impulse

Features: [Page 2-4] Sports and engineering important to student-athletes[Page 5-9] Senior engineering design conference prepares students for the industry[Page 10] Students stir science excitement in second graders[Page 11] SDSU team introduces area students to engineeringDepartments:Student news:[Page 11] Conde native named outstanding sophomore[Page 12] Bridge building: athletic competition[Page 13] Students receive Space Grants[Page 13] Clean water priority of civil engineering student[Page 13] Engineering students tour two South Dakota industries[Page 14] ME student makes your name his business[Page 16] Clifton awarded space grad assistantship at SDSU[Page 16] Channeling through RDTNFFaculty news:[Page 17] Gritzner wins faculty summer research grant at EROS[Page 17] Math professor\u27s program helps South Dakota businesses[Page 18] Quality is part of industrial management program[Page 18] Galipeau chairs Society of Plastics Engineers session[Page 19] SS Lacertae: SDSU professor writes of \u27Cosmic Billiards\u27[Page 19] Electric Council names Knabacb Person of the Year[Page 20] Grant to enable study of advanced electronic ceramics materials[Page 21] SDSU professor named to prestigious NASA science team[Page 21] Professor, students investigate ferroelectric nylon[Page 22] Bergum edits international journal on Fibonacci numbers[Page 22] Friedrich named College of Engineering computer specialistCampus news:[Page 23] Top ENTRE business plans win awards[Page 24] IMPULSE magazines goes on-line[Page 25] EED. Inventors Congress successful due to student involvement[Page 26] SDSU participates in second annual Space Day[Page 26] Industrial program receives environmental award[Page 27] Manufacturing engineering technology major to start this fall[Page 27] Vocational technical degree programs to change at SDSU[Page 28] Students, industry benefit from construction management major[Page 28] SDSU lecture series gives overview of EROS Data CenterAlumni news:[Page 29] SDSU education rates high with engineering alumnus[Page 29] Welding classes help graduate get design job[Page 30] \u27Dynamic Dakotans\u27 make their mark in Detroit[Page 30] National engineering society president speaks at SDSU[Page 31] Two former Brookings men named SDSU Distinguished Engineershttps://openprairie.sdstate.edu/coe_impulse/1026/thumbnail.jp

Teaching Lexical Humor to Children with Autism

Comprehension and production of linguistic humor is an important social, linguistic, and cognitive skill for all children, but it often fails to develop in children with autism. One form of linguistic humor that is based on multiple meaning words and can take the form of riddles or jokes has been identified as “lexical humor.” This study investigated the effects of the Lexical Humor Treatment Program (Gill, White, & Reyes, 2010) on six high-functioning children with autism. All of the children increased their understanding of multiple-meaning words and their ability to answer related riddles on which they had been trained. More importantly, the children were able to transfer their skill in practiced riddles to novel riddles on which they had not been trained. These results suggest that the teaching of humor in the form of lexical riddles might be an important treatment consideration for children with autism. Key words: Lexical Humor; Linguistic Humor; Autism; Asperger Syndrome; Riddles; Multiple Meaning Words; Humor Instructio

Futile treatment in hospital: Doctors' intergroup language

Treatment that will not provide significant net benefit at the end of a person’s life (called futile treatment) is considered by many people to represent a major problem in the health sector, as it can waste resources and raise significant ethical issues. Medical treatment at the end of life involves a complex negotiation that implicates intergroup communication between health professionals, patients, and families, as well as between groups of health professionals. This study, framed by intergroup language theory, analyzed data from a larger project on futile treatment, in order to examine the intergroup language associated with futile treatment. Hospital doctors (N = 96) were interviewed about their understanding of treatment given to adult patients at the end of life that they considered futile. We conducted a discourse analysis on doctors’ descriptions of futile treatment provided by themselves and their in-group and out-group colleagues. Results pointed to an intergroup context, with patients, families, and colleagues as out-groups. In their descriptions, doctors justified their own decisions using the language of logic, ethics, and respect. Patients and families, however, were characterized in terms of wishing and wanting, as were outgroup colleagues. In addition, out-group doctors were described in strongly negative intergroup language

Reefs at Risk: A Map-Based Indicator of Threats to the Worlds Coral Reefs

This report presents the first-ever detailed, map-based assessment of potential threats to coral reef ecosystems around the world. "Reefs at Risk" draws on 14 data sets (including maps of land cover, ports, settle-ments, and shipping lanes), information on 800 sites known to be degraded by people, and scientific expertise to model areas where reef degradation is predicted to occur, given existing human pressures on these areas. Results are an indicator of potential threat (risk), not a measure of actual condition. In some places, particularly where good management is practiced, reefs may be at risk but remain relatively healthy. In others, this indicator underestimates the degree to which reefs are threatened and degraded.Our results indicate that:Fifty-eight percent of the world's reefs are poten-tially threatened by human activity -- ranging from coastal development and destructive fishing practices to overexploitation of resources, marine pollution, and runoff from inland deforestation and farming.Coral reefs of Asia (Southeastern); the most species-rich on earth, are the most threatened of any region. More than 80 percent are at risk (undermedium and high potential threat), and over half are at high risk, primarily from coastal development and fishing-related pressures.Overexploitation and coastal development pose the greatest potential threat of the four risk categories considered in this study. Each, individually, affects a third of all reefs.The Pacific, which houses more reef area than any other region, is also the least threatened. About 60 percent of reefs here are at low risk.Outside of the Pacific, 70 percent of all reefs are at risk.At least 11 percent of the world's coral reefs contain high levels of reef fish biodiversity and are under high threat from human activities. These "hot spot" areas include almost all Philippine reefs, and coral communities off the coasts of Asia, the Comoros, and the Lesser Antilles in the Caribbean.Almost half a billion people -- 8 percent of the total global population -- live within 100 kilometers of a coral reef.Globally, more than 400 marine parks, sanctuaries, and reserves (marine protected areas) contain coral reefs. Most of these sites are very small -- more than 150 are under one square kilometer in size. At least 40 countries lack any marine protected areas for conserving their coral reef systems

Predatory journals and their practices present a conundrum for systematic reviewers and evidence synthesisers of health research: A qualitative descriptive study

Predatory journals are a blemish on scholarly publishing and academia and the studies published within them are more likely to contain data that is false. The inclusion of studies from predatory journals in evidence syntheses is potentially problematic due to this propensity for false data to be included. To date, there has been little exploration of the opinions and experiences of evidence synthesisers when dealing with predatory journals in the conduct of their evidence synthesis. In this paper, the thoughts, opinions, and attitudes of evidence synthesisers towards predatory journals and the inclusion of studies published within these journals in evidence syntheses were sought. Focus groups were held with participants who were experienced evidence synthesisers from JBI (previously the Joanna Briggs Institute) collaboration. Utilising qualitative content analysis, two generic categories were identified: predatory journals within evidence synthesis, and predatory journals within academia. Our findings suggest that evidence synthesisers believe predatory journals are hard to identify and that there is no current consensus on the management of these studies if they have been included in an evidence synthesis. There is a critical need for further research, education, guidance, and development of clear processes to assist evidence synthesisers in the management of studies from predatory journals.</p

Suppression of autophagy impedes glioblastoma development and induces senescence

The function of macroautophagy/autophagy during tumor initiation or in established tumors can be highly distinct and context-dependent. To investigate the role of autophagy in gliomagenesis, we utilized a KRAS-driven glioblastoma mouse model in which autophagy is specifically disrupted via RNAi against Atg7, Atg13 or Ulk1. Inhibition of autophagy strongly reduced glioblastoma development, demonstrating its critical role in promoting tumor formation. Further supporting this finding is the observation that tumors originating from Atg7-shRNA injections escaped the knockdown effect and thereby still underwent functional autophagy. In vitro, autophagy inhibition suppressed the capacity of KRAS-expressing glial cells to form oncogenic colonies or to survive low serum conditions. Molecular analyses revealed that autophagy-inhibited glial cells were unable to maintain active growth signaling under growth-restrictive conditions and were prone to undergo senescence. Overall, these results demonstrate that autophagy is crucial for glioma initiation and growth, and is a promising therapeutic target for glioblastoma treatment