1,201 research outputs found
Survey Participation in the Time of Corona: An Empirical Analysis of the Effect of the COVID-19 Pandemic on Survey Participation in a Swiss Panel Study
The singular effect of a public shutdown in spring 2020 â as a result of non-pharmaceutical official orders and arrangements in the course of the COVID-19 pandemic â on survey participation is investigated. The analysis is focused on panellists born around 1997 and living in German-speaking cantons of Switzerland. Utilising the techniques and procedures of event history analysis, the paradata of the fieldwork period are analysed in a dynamic microâmacro design. Several competing time-varying effects on the panellistsâ survey participation and changes in the pandemic progress are controlled for, in addition to time-constant covariates, such as their education and social origin. Indeed, it becomes obvious that the public shutdown during the first wave of the pandemic improved the target personsâ propensity for survey participation
Potential for soil organic carbon sequestration in grasslands in East African countries: A review
Grasslands occupy almost half of the world's land area. Soil organic carbon (SOC) is a key indicator of soil fertility and grassland productivity. Increasing SOC stocks (soâcalled SOC sequestration) improves soil fertility and contributes to climate change mitigation by binding atmospheric carbon dioxide (CO2). Grasslands constitute about 70% of all agricultural land, but their potential for SOC sequestration is largely unknown. This review paper quantitatively summarizes observationâbased studies on the SOC sequestration potential of grasslands in six East African countries (Burundi, Ethiopia, Kenya, Rwanda, Tanzania and Uganda) and seeks to identify knowledge gaps related to SOC sequestration potential in the region. In the studies reviewed, SOC stocks in grasslands range from 3 to 93 Mg C/ha in the upper 0.3 m of the soil profile, while SOC sequestration rate ranges from 0.1 to 3.1 Mg C haâ1 yearâ1 under different management strategies. Grazing management is reported to have a considerable impact on SOC sequestration rates, and grassland regeneration and protection are recommended as options to stimulate SOC sequestration. However, a very limited number of relevant studies are available (n = 23) and there is a need for fundamental information on SOC sequestration potential in the region. The effectiveness of potential incentive mechanisms, such as payments for environmental services, to foster uptake of SOCâenhancing practices should also be assessed
Language of motivation and emotion in an internet support group for smoking cessation: Explorative use of automated content analysis to measure regulatory focus
The present study describes a novel approach to the identification of the motivational processes in text data extracted from an Internet support group (ISG) for smoking cessation. Based on the previous findings that a âpreventionâ focus might be more relevant for maintaining behavior change, it was hypothesized that 1) language use (ie, the use of emotional words) signaling a âpromotionâ focus would be dominant in the initiating stages of the ISG, and 2) that the proportion of words signaling a prevention focus would increase over time. The data were collected from the ISG site, spanning 4 years of forum activity. The data were analyzed using the Linguistic Inquiry and Word Count application. The first hypothesis â of promotion focus dominance in the initiating stages â was not supported during year 1. However, for all the other years measured, the data showed that a prevention failure was more dominant compared with a promotion failure. The results indicate that content analysis could be used to investigate motivational and language-driven processes in ISGs. Understanding the interplay between self-regulation, lifestyle change, and modern communication channels could be of vital importance in providing the public with better health care services and interventions
Initiation of a Stable Convective Hydroclimatic Regime in Central America Circa 9000 Years BP
Many Holocene hydroclimate records show rainfall changes that vary with local orbital insolation. However, some tropical regions display rainfall evolution that differs from gradual precessional pacing, suggesting that direct rainfall forcing effects were predominantly driven by sea-surface temperature thresholds or inter-ocean temperature gradients. Here we present a 12,000âyr continuous U/Th-dated precipitation record from a Guatemalan speleothem showing that Central American rainfall increased within a 2000âyr period from a persistently dry state to an active convective regime at 9000âyr BP and has remained strong thereafter. Our data suggest that the Holocene evolution of Central American rainfall was driven by exceeding a temperature threshold in the nearby tropical oceans. The sensitivity of this region to slow changes in radiative forcing is thus strongly mediated by internal dynamics acting on much faster time scales
Growth promotants reduce beef's environmental impact
The Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311
Corn as cattle feed vs. human food
The Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311
Animal health and welfare are vital to beef sustainability
The Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311
Preclinical activity of melflufen (J1) in ovarian cancer
Ovarian cancer carries a significant mortality. Since symptoms tend to be minimal, the disease is often diagnosed when peritoneal metastases are already present. The standard of care in advanced ovarian cancer consists of platinum-based chemotherapy combined with cytoreductive surgery. Unfortunately, even after optimal cytoreduction and adjuvant chemotherapy, most patients with stage III disease will develop a recurrence. Intraperitoneal administration of chemotherapy is an alternative treatment for patients with localized disease. The pharmacological and physiochemical properties of melflufen, a peptidase potentiated alkylator, raised the hypothesis that this drug could be useful in ovarian cancer and particularily against peritoneal carcinomatosis. In this study the preclinical effects of melflufen were investigated in different ovarian cancer models. Melflufen was active against ovarian cancer cell lines, primary cultures of patient-derived ovarian cancer cells, and inhibited the growth of subcutaneous A2780 ovarian cancer xenografts alone and when combined with gemcitabine or liposomal doxorubicin when administered intravenously. In addition, an intra- and subperitoneal xenograft model showed activity of intraperitoneal administered melflufen for peritoneal carcinomatosis, with minimal side effects and modest systemic exposure. In conclusion, results from this study support further investigations of melflufen for the treatment of peritoneal carcinomatosis from ovarian cancer, both for intravenous and intraperitoneal administration
Impact of consuming beef on greenhouse gas emissions
The Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311
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