bluuebunny/crossref_metadata_2025_split huggingface dataset:
Snakebite During Pregnancy: A Literature Review
Authors: Langley Ricky Lee 
Published: January 2011

Objective To review reported bites by venomous snakes in pregnant women. Methods This is a review of Medline/PubMed articles on venomous snakebites occurring during pregnancy reported in the English literature from 1966 to May 2009. Results Two hundred thirteen venomous snakebites were reported in pregnant women. The overall case-fatality rate in the pregnant females was approximately 4%, and the fetal loss rate was approximately 20%. Conclusions Although rare, venomous bites and stings during pregnancy may have a significant adverse effect on the fetus as well as the mother.
Large Snake Size Suggests Increased Snakebite Severity in Patients Bitten by Rattlesnakes in Southern California
Authors: Janes Donald N. , Bush Sean P. , Kolluru Gita R. 
Published: January 2011

Objective To correlate rattlesnake size and other characteristics of envenomation with the severity of envenomation. Methods We retrospectively reviewed 145 charts of patients bitten by rattlesnakes in Southern California between 1995 and 2004, measuring Snakebite Severity Scores (SSS) and characteristics of envenomation that might be correlated with snakebite severity, including rattlesnake size, rattlesnake species, patient size, and anatomic location of the bite. Outcomes measured included SSS, complications of envenomation, number of vials of antivenom used, and length of hospital stay. Results Of the patients bitten by rattlesnakes, 81% were men, and 79% of bites were on the upper extremities. Fifty-five percent of bites were provoked by the patient, and 44% were unprovoked. Neither location of snakebite nor provocation of snakebite affected the SSS. Only 1 patient had a snakebite without envenomation, and only 1 patient died from envenomation. Rattlesnake size was positively correlated with SSS, and SSS was positively correlated with the number of vials of antivenom used and with the length of hospital stay. Rattlesnake species and patient mass did not affect SSS. Conclusions Larger rattlesnakes cause more severe envenomations, which contradicts popular belief.
Adverse Encounters With Alligators in the United States: An Update
Authors: Langley Ricky L. 
Published: January 2011

Objective Severe injuries and fatalities can occur from an alligator attack. Encounters with alligators appear to be increasing in the United States. This review provides information from alligator attacks reported in the United States as well as infections that may occur after an alligator bite. Methods Telephone interviews were conducted with state wildlife offices in all Southern states in order to collect information on the number of alligator bites, nuisance calls, and the estimated alligator population of each state. Detailed information from alligator attacks in Florida is presented, including basic demographic information on the victims and description of the types of injuries and the activity of the victim at the time of injury. Additional information regarding the size and behavior of the alligator involved in the attack is also provided in many cases. Results There have been 567 reports of adverse encounters with alligators with 24 deaths reported in the United States from 1928 to January 1, 2009. In addition, thousands of nuisance calls are made yearly and the number of nuisance calls as well as the alligator population is increasing in many states. Conclusions Injuries from encounters with alligators may range from minor scratches and punctures to amputations and death. The larger the alligator, the more likely that serious injury will occur. As the human population encroaches on the habitat of the alligator, attacks and nuisance complaints will continue to occur. A uniform reporting system among states should be developed to obtain more complete information on alligator encounters. Guidelines have been developed by many state wildlife officials to reduce adverse encounters with alligators.
Chemical Oxygen Generation: Evaluation of the Green Dot Systems, Inc Portable, Nonpressurized emOx Device
Authors: Pollock Neal W. , Natoli Michael J. 
Published: January 2011

Objective To evaluate the performance of the emOx emergency powdered oxygen portable nonpressurized delivery system. This device produces oxygen through chemical reaction and is marketed for emergency first aid use until professional medical assistance is available. Methods Seven unmanned trials were conducted under standard laboratory conditions. Measures included oxygen flow, reaction canister external wall temperature, delivered gas temperature, and delivered gas relative humidity. Results The mean oxygen flow was 1.75 ± 1.58 L · min−1 (mean ± SD) with a total yield of 40.4 ± 2.6 L. Oxygen flow increased slowly and with substantial variability between reactant groups, exceeding 2.0 L · min−1 after 15.7 ± 6.4 minutes of operation. Oxygen flow briefly peaked at 5.93 ± 0.56 L · min−1 at 17.8 ± 7.9 minutes before rapidly falling to zero. The mean oxygen fraction was 0.81 ± 0.28, exceeding 0.96 in 10.7 ± 2.9 minutes. The reaction canister external wall temperature reached 54.7 ± 7.4°C. Delivered gas temperature varied little from ambient. Delivered gas relative humidity surpassed 75% in 8 ± 3 minutes and 90% in 15 ± 5 minutes of operation. Conclusions A readily available, high concentration oxygen supply could have utility to manage many conditions in advance of the arrival of professional emergency medical services (EMS). Unfortunately, the highly variable activation time and low average oxygen flow rate make the rapid deployment value of the emOx equivocal. The limited total oxygen yield makes it inappropriate for conditions demanding significant oxygen resources. Advancement in oxygen concentrator systems likely holds far more promise than powdered chemical oxygen generation for first aid and emergency medical applications.
Effectors of Visual Search Efficacy on the Allegheny Plateau
Authors: Chiacchia Kenneth B. , Houlahan Heather E. 
Published: January 2011

Background Although lost-person search managers try to direct search efforts quantitatively, it has historically been difficult to quantify the efficacy of search efforts accurately. The effective-sweep-width (ESW) methodology represents an avenue for accomplishing this goal but has not yet been widely disseminated among practitioners. Methods We obtained ESW values in the summer and winter in a typical disturbed-forest environment in southwest Pennsylvania. We used nonparametric statistics to compare individual ESW values for two types of search objects detected by 18 summer and 20 winter searchers, cumulating the P values for similar comparisons and correcting for false discovery via a stepped method. Results We detected robust differences (all at P <.001) associated with search object color, season, and vegetation thickness. In contrast with earlier studies, we found a significant correlation between individual searchers' ESWs for different search objects and different types of vegetation ( P <.001). We also found that adolescent searchers had significantly lower ESW values than adults ( P = .002). Apparently significant positive correlations between time spent on the course or field search experience and ESW disappeared when teens were excluded from the comparisons. Conclusions These results (the first comparison of seasonal ESW effects in identical terrain) represent the first statistical demonstration that the ESW methodology provides more than enough resolution to answer fundamental questions about the efficacy of visual search for lost persons by human searchers. They also add support to the imperative of operationally disseminating these methods among search-and-rescue practitioners, and offer some initial operational lessons for search managers.
Prospective, Double-Blind, Randomized, Placebo-Controlled Comparison of Acetazolamide Versus Ibuprofen for Prophylaxis Against High Altitude Headache: The Headache Evaluation at Altitude Trial (HEAT)
Authors: Gertsch Jeffrey H. , Lipman Grant S. , Holck Peter S. , Merritt Andrew , Mulcahy Allison , Fisher Robert S. , Basnyat Buddha , Allison Eric , Hanzelka Keeli , Hazan Alberto , Meyers Zachary , Odegaard Justin , Pook Benjamin , Thompson Mark , Slomovic Brant , Wahlberg Henrik , Wilshaw Vanessa , Weiss Eric A. , Zafren Ken 
Published: January 2011

Objective High altitude headache (HAH) is the most common neurological complaint at altitude and the defining component of acute mountain sickness (AMS). However, there is a paucity of literature concerning its prevention. Toward this end, we initiated a prospective, double-blind, randomized, placebo-controlled trial in the Nepal Himalaya designed to compare the effectiveness of ibuprofen and acetazolamide for the prevention of HAH. Methods Three hundred forty-three healthy western trekkers were recruited at altitudes of 4280 m and 4358 m and assigned to receive ibuprofen 600 mg, acetazolamide 85 mg, or placebo 3 times daily before continued ascent to 4928 m. Outcome measures included headache incidence and severity, AMS incidence and severity on the Lake Louise AMS Questionnaire (LLQ), and visual analog scale (VAS). Results Two hundred sixty-five of 343 subjects completed the trial. HAH incidence was similar when treated with acetazolamide (27.1%) or ibuprofen (27.5%; P = .95), and both agents were significantly more effective than placebo (45.3%; P = .01). AMS incidence was similar when treated with acetazolamide (18.8%) or ibuprofen (13.7%; P = .34), and both agents were significantly more effective than placebo (28.6%; P = .03). In fully compliant participants, moderate or severe headache incidence was similar when treated with acetazolamide (3.8%) or ibuprofen (4.7%; P = .79), and both agents were significantly more effective than placebo (13.5%; P = .03). Conclusions Ibuprofen and acetazolamide were similarly effective in preventing HAH. Ibuprofen was similar to acetazolamide in preventing symptoms of AMS, an interesting finding that implies a potentially new approach to prevention of cerebral forms of acute altitude illness.
Injuries Related to Hiking with a Pack During National Outdoor Leadership School Courses: A Risk Factor Analysis
Authors: Hamonko Matthew T. , McIntosh Scott E. , Schimelpfenig Tod , Leemon Drew 
Published: January 2011

Objectives To determine if packweight, anthropometry, and individual characteristics are related to acute musculoskeletal and soft tissue injuries while wearing backpacks on wilderness expeditions. Methods This was a review of prospectively gathered data on participants and instructors enrolled in National Outdoor Leadership School Rocky Mountain hiking courses between March 2008 and October 2009. Packweight, height, body weight, age, and gender were collected. Individuals that suffered acute musculoskeletal and soft tissue injuries while hiking with a backpack were recorded and compared to individuals that did not suffer injuries. Logistic regression was used to determine which variables were significantly correlated with injuries. Odds ratios with associated confidence intervals and p-values are reported. Results One thousand two hundred and one individuals were included in the final analysis. Twenty-six individuals of this population suffered reportable musculoskeletal and soft tissue injuries while hiking with a pack. None of the factors examined (packweight, height, body weight, age, gender, or packweight to body weight ratio) were significant in predicting acute injury. Conclusions Based on our results, an individual's packweight, anthropometry, and individual characteristics neither increase nor decrease their risk of experiencing a musculoskeletal or soft tissue injury while hiking with a backpack. Other factors, including fitness, pretrip training, and footwear, should be examined to determine appropriate strategies to reduce significant musculoskeletal and soft tissue injuries on wilderness expeditions.
Ideals of Herzog–Northcott type
Authors: O'Carroll Liam , Planas-Vilanova Francesc 
Published: January 2011

AbstractThis paper takes a new look at ideals generated by 2×2 minors of 2×3 matrices whose entries are powers of three elements not necessarily forming a regular sequence. A special case of this is the ideals determining monomial curves in three-dimensional space, which were studied by Herzog. In the broader context studied here, these ideals are identified as Northcott ideals in the sense of Vasconcelos, and so their liaison properties are displayed. It is shown that they are set-theoretically complete intersections, revisiting the work of Bresinsky and of Valla. Even when the three elements are taken to be variables in a polynomial ring in three variables over a field, this point of view gives a larger class of ideals than just the defining ideals of monomial curves. We then characterize when the ideals in this larger class are prime, we show that they are usually radical and, using the theory of multiplicities, we give upper bounds on the number of their minimal prime ideals, one of these primes being a uniquely determined prime ideal of definition of a monomial curve. Finally, we provide examples of characteristic-dependent minimal prime and primary structures for these ideals.
Metamorphism and diachronous cooling in a contractional orogen: the Strandja Massif, NW Turkey
Authors: SUNAL G. , SATIR M. , NATAL'IN B. A. , TOPUZ G. , VONDERSCHMIDT O. 
Published: January 2011

AbstractThe southern part of the Strandja Massif, northern Thrace, Turkey, comprises a basement of various gneisses, micaschists and rare amphibolite, and a cover of metaconglomerate and metasandstone, separated from each other by a pre-metamorphic unconformity. Metamorphic grade decreases from the epidote–amphibolite facies in the south to the albite–epidote–amphibolite/greenschist-facies transition in the north. Estimated P–T conditions are 485–530°C and 0.60–0.80 GPa in the epidote–amphibolite facies domain, and decrease towards the transitional domain between greenschist- and epidote–amphibolite facies. Rb–Sr muscovite ages range from 162.9 ± 1.6 Ma to 149.1 ± 2.1 Ma, and are significantly older (279–296 Ma) in the northernmost part of the study area. The Rb–Sr biotite ages decrease from 153.9 ± 1.5 Ma in the south to 134.4 ± 1.3 Ma in the north. These age values in conjunction with the attained temperatures suggest that the peak metamorphism occurred at around 160 Ma and cooling happened diachronously, and Rb–Sr muscovite ages were not reset during the metamorphism in the northernmost part. Structural features such as (i) consistent S-dipping foliation and SW to SE-plunging stretching lineation, (ii) top-to-the-N shear sense, and (iii) N-vergent ductile shear zones and brittle thrusts suggest a N-vergent compressional deformation coupled with exhumation. We tentatively ascribe this metamorphism and subsequent diachronous cooling to the northward propagation of a thrust slice. The compressional events in the Strandja Massif were most probably related to the coeval N-vergent subduction/collision system in the southerly lying Rhodope Massif.
Security as translation: threats, discourse, and the politics of localisation
Authors: STRITZEL HOLGER 
Published: January 2011

AbstractThis article aims at enhancing our understanding of how collective interpretations of threats, stabilised and temporarily fixed in names, travel across different local discourse communities. I contend that globally accepted names result from gradual cross-cultural processes of localisation. Specifically, I argue that the discursive dynamics of elusiveness, compatibility and adaptation suggest a framework of analysis for how collective interpretations or names travel.
Protons and ion acceleration from thick targets at 1010 W/cm2 laser pulse intensity
Authors: Torrisi L. , Caridi F. , Giuffrida L. 
Published: January 2011

AbstractProton ion acceleration via laser-generated plasma is investigated at relatively low laser pulse intensity, on the order of 1010 W/cm2. Time-of-flight technique is employed to measure the ion energy and the relative yield. An ion collector and an ion energy analyzer are used with this aim and to distinguish the number of charge states of the produced ions. The kinetic energy and the emission yield are measured through a consolidated theory, which assumes that the ion emission follows the Coulomb-Boltzmann-Shifted function. The proton stream is generated by thin and thick hydrogenated targets and it is dependent on the free electron states, which increase the laser absorption coefficient and the ion acceleration. The maximum proton energy, of about 200 eV, and the maximum proton amount can be obtained with thick metallic hydrogenated materials, such as the titanium hydrate TiH2.
Cracking the Dutch Early Music Movement: the Repercussions of the 1969 Notenkrakersactie
Authors: RUBINOFF KAILAN R. 
Published: January 2011

AbstractThe Notenkrakersactie of 17 November 1969 was a landmark event for Dutch musical life: a group of composers disrupted a concert of the Concertgebouw Orchestra, protesting against the orchestra's lack of contemporary music programming. Scholars have tended to interpret this protest as a watershed for the avant-garde, but historical performance – not just contemporary music – proved to be a significant beneficiary. Early Musicians, like New Musicians, had common political goals and appealed to the youth counterculture. Ensuing reforms to the federal arts subsidy system, state-funded music schools, and conservatories in the 1970s were also advantageous for the Dutch Early Music movement. During the welfare retrenchment of the 1980s and the subsidy restructuring of the 1990s, Early Music ensembles economized and had greater success with mainstream recording companies and audiences than new music groups. Nearly forty years after the Notenkrakersactie, traditional symphony orchestras have less influence on Dutch musical life, but recent cutbacks to arts subsidies threaten contemporary music and historical performance alike.
Orality and Rhetoric in Scelsi's Music
Authors: DICKSON IAN 
Published: January 2011

AbstractIn his later music Giacinto Scelsi rejected the mediation of notation, improvising his works and viewing the scores, produced mostly by assistants, as a mere record. But to what extent did he really transcend the ‘tyranny of writing’ and how might one demonstrate this? Critics have tended to echo the composer in reducing the problem to an opposition between writing and sound per se. In this article I discuss the limitations of this view and propose a more structural approach, using in particular the analysis of Walter Ong. I argue that Scelsi's idiom, while novel in its extreme economy of means, uses these means in such a way as to restore a traditional sense of musical ‘grammar’. I illustrate the rhetorical versatility of this grammar by contrasting the two apparently similar movements of the Duo of 1965.
Toward a Complete Phyloreferencing Language
Authors: Keesey T. Michael 
Published: January 2011

AbstractA phyloreference is a statement indicating a taxon within a phylogenetic context. A common use for phyloreferences is in phylogenetic definitions, which tie taxonomic names to taxa via such statements. Several conventions for writing phyloreferences have been proposed, but most only cover a few “standard” forms (node‑, branch‑, and perhaps apomorphy‑based clades) without the capacity to represent more “exotic” forms (e.g., ancestor‑based clades and qualified/modified references). In order to build a complete phyloreferencing language, the mathematical underpinnings of phylogenetic contexts must be clarified. A phylogenetic context may be modeled as a directed, acyclic graph, wherein nodes model taxonomic units and directed edges model immediate descent. Higher taxa are modeled as unions of nodes. A phyloreferencing language must minimally allow for certain classes of entity: Boolean values, sets (including taxa, relations, and the empty set), and lists (including graphs and functions). It must also minimally allow for basic operations related to logic, set theory, and graph theory. Higher structures such as declarations and piecewise constructs must also be possible. With these as a basis, functions related to phylogeny can be defined: maximal, minimal, predecessor union/intersection, successor union/intersection, exclusive predecessors, synapomorphic predecessors, clade, crown clade, and total clade. I show how such a language may be used to represent various types of phyloreference, both “standard” and “exotic”.
Simultaneous single-molecule measurements of phage T7 replisome composition and function reveal the mechanism of polymerase exchange
Authors: Loparo Joseph J. , Kulczyk Arkadiusz W. , Richardson Charles C. , van Oijen Antoine M. 
Published: January 2011

A complete understanding of the molecular mechanisms underlying the functioning of large, multiprotein complexes requires experimental tools capable of simultaneously visualizing molecular architecture and enzymatic activity in real time. We developed a novel single-molecule assay that combines the flow-stretching of individual DNA molecules to measure the activity of the DNA-replication machinery with the visualization of fluorescently labeled DNA polymerases at the replication fork. By correlating polymerase stoichiometry with DNA synthesis of T7 bacteriophage replisomes, we are able to quantitatively describe the mechanism of polymerase exchange. We find that even at relatively modest polymerase concentration (∼2 nM), soluble polymerases are recruited to an actively synthesizing replisome, dramatically increasing local polymerase concentration. These excess polymerases remain passively associated with the replisome through electrostatic interactions with the T7 helicase for ∼50 s until a stochastic and transient dissociation of the synthesizing polymerase from the primer-template allows for a polymerase exchange event to occur.
Origins of Disease Phobia
Authors: Bianchi G. N. 
Published: January 2011

The literature on disease phobia is discussed and a controlled study of this variety of hypochondriasis is presented. There were 30 disease phobic and 30 control subjects, in-patients of a general hospital psychiatric unit in Sydney. Controls were defined as lacking the symptoms ‘disease phobia’, ‘disease conviction’, ‘somatic preoccupation’ and ‘psychogenic pain’. Matching was one-for-one and concerned sex, age and occupational prestige. In brief, the disease phobics were more anxious and self-pitying (current mental state). Before the illness they were more prone to inhibition of anger, bodily concern and low selfesteem (personality variables). As children they were more often weak, sickly and overprotected. Fifteen were youngest siblings versus only six of the controls. They gave a history of much family illness, substantiated by the findings of an excess of deaths among the mothers of disease phobics (life history characteristics). They reported an electrical current as a sensation at relatively low voltages and had low tolerance of pain (experimental measures). A logical insight into the origins of disease phobia is provided by inter-relating the data from these four aspects of the investigations (Fig. 1). This matrix is interpreted in terms of the augmentation-reduction theory of Petrie.