377 research outputs found
Review of \u3ci\u3eHard Grass: Life on the Crazy Woman Bison Ranch.\u3c/i\u3e By Mary Zeiss Stange
Twenty years ago, Stange and her husband traded a modest New Jersey house for seven square miles of overgrazed prairie and set out to right the wrongs done to a place that had been mismanaged ecologically as well as environmentally. The restoration begins disastrously with llamas before it proceeds to success with bison. Her narration includes her own experiences, but most of her essays are serious, in-depth studies of the broader topics that constitute life in the great grasslands spreading across the interior of the country. She begins with prehistory, analyzing the evolution of both plants and animals in the region, before moving on to the often brutal human history. She covers every imaginable subject, from the Buffalo Commons to carnivores and the problems of being a locavore in the sagebrush Plains. She looks at the history of the Cheyenne Natives of the region and the current interest in coalbed methane. She contemplates cows, emotional distance, gender stereotypes, mirages, hunting, privacy, weather, and the Montana Dream. Her observations and opinions are solidly buttressed with research, and she lists her primary sources
Review of \u3ci\u3eHard Grass: Life on the Crazy Woman Bison Ranch.\u3c/i\u3e By Mary Zeiss Stange
Twenty years ago, Stange and her husband traded a modest New Jersey house for seven square miles of overgrazed prairie and set out to right the wrongs done to a place that had been mismanaged ecologically as well as environmentally. The restoration begins disastrously with llamas before it proceeds to success with bison. Her narration includes her own experiences, but most of her essays are serious, in-depth studies of the broader topics that constitute life in the great grasslands spreading across the interior of the country. She begins with prehistory, analyzing the evolution of both plants and animals in the region, before moving on to the often brutal human history. She covers every imaginable subject, from the Buffalo Commons to carnivores and the problems of being a locavore in the sagebrush Plains. She looks at the history of the Cheyenne Natives of the region and the current interest in coalbed methane. She contemplates cows, emotional distance, gender stereotypes, mirages, hunting, privacy, weather, and the Montana Dream. Her observations and opinions are solidly buttressed with research, and she lists her primary sources
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Complete Experimental Structure Determination of the p(3x2)pg Phase of Glycine on Cu{110}
We present a quantitative low energy electron diffraction (LEED) surface-crystallograpic
study of the complete adsorption geometry of glycine adsorbed on Cu{110} in the ordered
p(3×2) phase. The glycine molecules form bonds to the surface through the N atoms of the
amino group and the two O atoms of the de-protonated carboxylate group, each with separate
Cu atoms such that every Cu atom in the first layer is involved in a bond. Laterally, N atoms are
nearest to the atop site (displacement 0.41 Å). The O atoms are asymmetrically displaced from
the atop site by 0.54 Å and 1.18 Å with two very different O-Cu bond lengths of 1.93 Å and
2.18 Å. The atom positions of the upper-most Cu layers show small relaxations within 0.07 Å
of the bulk-truncated surface geometry. The unit cell of the adsorbate layer consists of two
glycine molecules, which are related by a glide-line symmetry operation. This study clearly
shows that a significant coverage of adsorbate structures without this glide-line symmetry must
be rejected, both on the grounds of the energy dependence of the spot intensities (LEED-IV
curves) and of systematic absences in the LEED pattern
Environmental compensation for biodiversity and ecosystem services: A flexible framework that addresses human wellbeing
Environmental compensation should address negative impacts from human activities on nature, including loss of biodiversity and ecosystem services. However, successful compensation, achieving no net loss, requires broad quantitative information on different types of losses and gains. We find that the scope of compensatory schemes varies in what is considered compensable, which makes it challenging to apply a conceptual approach consistently across schemes with different needs. We propose a flexible yet structured framework for determining which values should be compensated and how. Our framework focuses specifically on habitat deterioration and is illustrated with a case study involving loss of eelgrass habitat. The framework helps identify compensation needs and selects among suitable compensation options, merging science-based information with normative issues and local concerns. By integrating the ecosystem services cascade model, it encompasses aspects from biodiversity structure to human wellbeing. The framework prefers in-kind compensation because this targets the structure level and thus meets compensation needs in all subsequent levels of the cascade model; further, it is more likely to capture non-instrumental values (i.e. in nature) and reduce exposure to uncertainty. We highlight the importance of spatial aspects of ecosystem functions, services and their subsequent impacts on wellbeing. Although our selection hierarchy assumes a "similar and nearby" principle for habitat restoration (preference for in-kind/on-site), this criterion is not universal. We underscore the hierarchy's implicit normative assumptions and suggest that apparent disagreement about who should benefit may be traced to an unresolved conflict between egalitarianism and utilitarianism
Pharmacokinetics of Pirmenol Enantiomers and Pharmacodynamics of Pirmenol Racemate in Patients with Premature Ventricular Contractions
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/97238/1/j.1552-4604.1997.tb04328.x.pd
Theory, Reality, and Performativity in Markets
The purpose of this article is to analyze the relation between scientific knowledge in the form of theories and the world that such theories are about. The focus is on market theories. I argue that everyday knowledge, conceptualized using the notion of “lifeworld,” is the bedrock of scientific knowledge. I also make two distinctions, one between types of markets and one between principles of order in markets. There are two different types of markets, fixed-role markets and switch-role markets, and no existing theory can be used to explain both of them. In fixed-role markets, such as a producer market of garments, actors are identified as either sellers or buyers. In switch-role markets, such as the stock exchange market or currency market, actors are not identified with one role. The other distinction is between standard and status markets. In a status market, order is maintained because the identities of actors on both sides of the market are ranked according to status, which is a more entrenched social construction than the commodity traded in the market. In a market characterized by standards, the situation is reversed: the commodity is a more entrenched social construction than the social status of actors in the market. These distinctions are the backdrop of my analysis of the idea that markets are performed. It is concluded that the performativity approach is useful today for analyzing switch-role markets. A further conclusion is that neoclassical economic theory can be used in understanding switch-role markets, but not fixed-role markets
Metabolic risk factors, physical activity and physical fitness in azorean adolescents: a cross-sectional study
<p>Abstract</p> <p>Background</p> <p>The prevalence of metabolic syndrome has increased over the last few decades in adolescents and has become an important health challenge worldwide. This study analyzed the relationships between metabolic risk factors (MRF) and physical activity (PA) and physical fitness (PF) in a sample of Azorean adolescents.</p> <p>Methods</p> <p>A cross-sectional school-based study was conducted on 417 adolescents (243 girls) aged 15-18 from the Azorean Islands, Portugal. Height, weight, waist circumference, fasting glucose, HDL-cholesterol, triglycerides, and blood pressure were measured. A sum of MRF was computed, and adolescents were classified into three groups: no MRF, one MRF and two or more MRF. PA was assessed by a sealed pedometer. PF was assessed using five tests from the Fitnessgram Test Battery. Dietary intake was obtained using a semi-quantitative food frequency questionnaire.</p> <p>Results</p> <p>Mean daily steps for girls and boys were 7427 ± 2725 and 7916 ± 3936, respectively. Fifty-nine percent of the adolescents showed at least one MRF and 57.6% were under the healthy zone in the 20 m Shuttle Run Test. Ordinal logistic regression analysis showed that after adjusting for sex, body mass index, socio-economic status and adherence to a Mediterranean diet, adolescents who were in the highest quartile of the pedometer step/counts (≥9423 steps/day) and those who achieved the healthy zone in five tests were less likely to have one or more MRF (OR = 0.56;95%CI:0.33-0.95; OR = 0.55;95%CI:0.31-0.98, respectively).</p> <p>Conclusions</p> <p>Daily step counts and PF levels were negatively associated with having one or more MRF among Azorean adolescents. Our findings emphasize the importance of promoting and increasing regular PA and PF to reduce the public health burden of chronic diseases associated with a sedentary lifestyle.</p
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