bluuebunny/crossref_metadata_2025_split huggingface dataset:
Assessing sedimentation issues within aging flood-control reservoirs
Authors: Bennett Sean J. , Dunbar John A. , Rhoton Fred E. , Allen Peter M. , Bigham Jerry M. , Davidson Gregg R. , Wren Daniel G. 
Published: July 2013

Abstract
Flood-control reservoirs designed and built by federal agencies have been extremely effective in reducing the ravages of floods nationwide. Yet some structures are being removed for a variety of reasons, while others are aging rapidly and require either rehabilitation or decommissioning. The focus of the paper is to summarize collaborative research activities to assess sedimentation issues within aging flood-control reservoirs and to provide guidance on such tools and technologies. Ten flood-control reservoirs located in Oklahoma, Mississippi, and Wisconsin have been examined using vibracoring, stratigraphic, geochronologic, geophysical, chemical, and geochemical techniques and analyses. These techniques and analyses facilitated: (1) the demarcation of the pre-reservoir sediment horizon within the deposited reservoir sediment, (2) definition of the textural and stratigraphic characteristics of the sediment over time and space, (3) the accurate determination of the remaining reservoir storage capacity, (4) the quantification of sediment quality with respect to agrichemicals and environmentally important trace elements over both time and space, and (5) the determination of geochemical conditions within the deposited sediment and the potential mobility of associated elements. The techniques employed and discussed here have proven to be successful in the assessment of sediment deposited within aging flood-control reservoirs, and it is envisioned that these same approaches could be adopted by federal agencies as part of their national reservoir management programs.
Engineering Geology of Radioactive Waste Disposal
Authors: Laguna Wallace De 
Published: July 2013

Abstract
Disposal of the radioactive wastes from our coming nuclear power economy will be a difficult problem, for the wastes are corrosive and toxic and liberate heat slowly for a long time. In a few decades the amount of waste will represent a formidable problem, and one which must be solved with a high degree of certainty. Waste disposal at present is largely by tank storage, supplemented by release of some low- to intermediate-level waste to the ground. Tank storage will hardly be an answer to the disposal problems of the future, and release to the ground, even at the present small scale, is raising problems that have not been and perhaps cannot be answered and so may have elements of hazard.
Three possible methods for future waste disposal are now being investigated: fixation in or as solids, disposal into salt, and disposal into deep porous formations. The fixation methods now under investigation all involve heating the waste, are expensive, and are dangerous to the operators, but the solid product once formed would probably be no further hazard. Disposal into salt can be arranged by mining the salt through shafts, which is expensive and will require shaft maintenance. Alternatively, cavities can be dissolved in salt by pumping fresh water down wells, but either such cavities must be small, or their use must be restricted to the disposal of medium-level waste if they are not to overheat. Cavities in salt should provide safe storage, for salt is quite impermeable, but the use of salt as a structural material raises questions. Disposal through deep wells also appears to have serious limitations. The wastes will have to be filtered and diluted and perhaps treated to reduce corrosion of the disposal wells. Heat-generation problems will prevent the disposal of fresh, high-level waste. However, the very large potential storage capacity of deep porous formations suggests that the method may be applicable for the very large amounts of waste that will eventually be produced. Recently an investigation has begun of the possibility of disposing of waste mixtures into shale by fracturing. The subject is controversial, and although the initial experiments look promising it will take much experience with low-level waste before the future of the method can be evaluated.
Stabilization of Rock by Bolting
Authors: Thomas Edward 
Published: July 2013

Abstract
During the past 10 years rock bolting has evolved into a systematic method of underground roof, wall, and floor support, which is generally accepted wherever ground can be consolidated economically and efficiently. Although the method was known and used occasionally over a long period of time, apparently acceptance was contingent upon the improvements in drilling and mechanized loading that have taken place just before and concurrent with the development. Rock bolting effects a general improvement in safety by reducing roof-fall accidents, increases efficiency, and makes for conservation in mining.
This paper attempts a logical classification of rock bolts from the standpoint of utilization and provides current criteria for designing and testing installations.
Land Subsidence Due to the Application of Water
Authors: Lofgren Ben E. 
Published: July 2013

Abstract
Loose, dry, low-density deposits that compact when they are wetted mantle extensive areas in North America, Europe, and Asia. This process, here referred to as hydrocompaction, has produced widespread subsidence of the land surface. Hydrocompaction may occur under natural overburden load or may occur only with the addition of a surcharge load.
Deposits that subside because of hydrocompaction are generally one of two types: (1) loose, moisture-deficient alluvial deposits; and (2) moisture-deficient loess and related eolian deposits. Such deposits occur in regions where seasonal rainfall seldom, if ever, is sufficient to penetrate below the root zone; thus, they have remained moisture deficient throughout their postdepositional history and are readily susceptible to hydrocompaction when they are artificially wetted.
Subsidence due to hydrocompaction is of serious concern in the design and maintenance of aqueducts, buildings, pipe lines, highways, and other major engineering structures. Damage usually can be minimized by precompacting the deposits before construction begins.
Geologic Settings of Subsidence
Authors: Allen Alice S. 
Published: July 2013

ABSTRACT
This paper reviews the role of geologic processes that contribute to subsidence in order to aid those starting investigations of ground-surface subsidence. Subsidence occurs, or at least is discovered, only infrequently, and little organized information has been available. In order to assess our present state of knowledge, the author gathered fragmentary bits of information from many sources widely scattered in the literature of geology and other earth sciences.
The author cites examples for each geologic process that is a potential contributor to ground-surface subsidence together with geologic evidence for diagnosing their causes. The geologic processes involved are: (1) solution of gypsum and salt and redistribution of transient fill materials through solution cavities in calcareous rocks; (2) underground erosion of uncemented or lightly cemented silt and sand through temporary underground passageways; (3) lateral plastic flow of salt, gypsum and anhydrite, shale, and clay under loading; (4) compaction of sediments by loading, drainage, vibration, and hydrocompaction; (5) tectonic movements including primary and secondary effects of earthquakes, folding, and warping; and (6) volcanic activity. Because the first four processes may be accelerated by various engineering activities, examples have been selected to illustrate subsidence both under natural conditions and under conditions modified by man's activities.
Although this extensive search for existing information on the role of geologic factors in subsidence indicates that much detailed work remains to be done, the future prospects for advancing our geologic knowledge are excellent. Methods of measuring ground-surface displacements are improving rapidly. Also, broadly based investigations of known areas of major subsidence throughout the world are developing new methods of diagnosis and treatment and are yielding quantitative data that will aid our evaluation of the rates and magnitude of present-day geologic processes.
Time for bed: associations with cognitive performance in 7-year-old children: a longitudinal population-based study
Authors: Kelly Yvonne , Kelly John , Sacker Amanda 
Published: July 2013

BackgroundLittle is known about the links between the time that young children go to bed and their cognitive development. In this paper we seek to examine whether bedtimes in early childhood are related to cognitive test scores in 7-year-olds.MethodsWe examined data on bedtimes and cognitive test (z-scores) for reading, maths and spatial abilities for 11 178 7-year-old children from the UK Millennium Cohort Study.ResultsAt age 7, not having a regular bedtime was related to lower cognitive test scores in girls: reading (β: −0.22), maths (β: −0.26) and spatial (β: −0.15), but not for boys. Non-regular bedtimes at age 3 were independently associated, in girls and boys, with lower reading (β: −0.10, −0.20), maths (β: −0.16, −0.11) and spatial (β: −0.13, −0.16) scores. Cumulative relationships were apparent. Girls who never had regular bedtimes at ages 3, 5 and 7 had significantly lower reading (β: −0.36), maths (β: −0.51) and spatial (β: −0.40) scores, while for boys this was the case for those having non-regular bedtimes at any two ages (3, 5 or 7 years): reading (β: −0.28), maths (β: −0.22) and spatial (β: −0.26) scores. In boys having non-regular bedtimes at all three ages (3, 5 and 7 years) were non-significantly related to lower reading, maths and spatial scores.ConclusionsThe consistent nature of bedtimes during early childhood is related to cognitive performance. Given the importance of early child development, there may be knock on effects for health throughout life.
Comparison of magnetic, electrical and ground penetrating radar surveys to detect buried forensic objects in semi-urban and domestic patio environments
Authors: Hansen J. D. , Pringle J. K. 
Published: July 2013

Abstract
Near-surface geophysical techniques should be routinely utilized by law enforcement agencies to locate shallowly buried forensic objects, saving human and other resources. However, there has been little published research on optimum geophysical detection method(s) and configurations beyond metal detectors. This paper details multi-technique geophysical surveys to detect simulated unmarked illegal weapons, explosive devices and arms caches that were shallowly buried within a semi-urban environment test site. A concrete patio was then overlaid to represent a common household garden environment before re-surveying. Results showed that the easily utilized magnetic susceptibility probe was optimal for target detection in both semi-urban and patio environments, while basic metal detector surveys had a lower target detection rate in the patio scenario with some targets remaining undetected. High-frequency (900 MHz) ground penetrating radar antennae were optimum for target detection in the semi-urban environment, while 450 and 900 MHz frequencies had similar detection rates in the patio scenario. Resistivity surveys at 0.25 m probe and sampling spacing were good for target detection in the semi-urban environment. 2D profiles were sufficient for target detection, but resistivity datasets required site de-trending to resolve targets in map view. Forensic geophysical techniques are rapidly evolving to assist search investigators to detect hitherto difficult-to-locate buried forensic targets.
An Advanced System to Monitor the 3D Structure of Diffuse Volcanic Ash Clouds
Authors: Vernier J.-P. , Fairlie T. D. , Murray J. J. , Tupper A. , Trepte C. , Winker D. , Pelon J. , Garnier A. , Jumelet J. , Pavolonis M. , Omar A. H. , Powell K. A. 
Published: July 2013

AbstractMajor disruptions of the aviation system from recent volcanic eruptions have intensified discussions about and increased the international consensus toward improving volcanic ash warnings. Central to making progress is to better discern low volcanic ash loadings and to describe the ash cloud structure more accurately in three-dimensional space and time. Here, dispersed volcanic ash observed by the Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) space-based lidar near 20 000–40 000 ft [~(6–13) km] over Australia and New Zealand during June 2011 is studied. This ash event took place 3 weeks after the Puyehue-Cordon Caulle eruption, which disrupted air traffic in much of the Southern Hemisphere. The volcanic ash layers are shown to exhibit color ratios (1064/532 nm) near 0.5, significantly lower than unity, as is observed with ice. Those optical properties are used to develop an ash detection algorithm. A “trajectory mapping” technique is then demonstrated wherein ash cloud observations are ingested into a Lagrangian model and used to construct ash dispersion maps and cross sections. Comparisons of the model results with independent observations suggest that the model successfully reproduces the 3D structure of volcanic ash clouds. This technique has a potential operational application in providing important additional information to worldwide volcanic ash advisory centers.
Local Dynamics of Baroclinic Waves in the Martian Atmosphere
Authors: Kavulich Michael J. , Szunyogh Istvan , Gyarmati Gyorgyi , Wilson R. John 
Published: July 2013

Abstract
The paper investigates the processes that drive the spatiotemporal evolution of baroclinic transient waves in the Martian atmosphere by a simulation experiment with the Geophysical Fluid Dynamics Laboratory (GFDL) Mars general circulation model (GCM). The main diagnostic tool of the study is the (local) eddy kinetic energy equation. Results are shown for a prewinter season of the Northern Hemisphere, in which a deep baroclinic wave of zonal wavenumber 2 circles the planet at an eastward phase speed of about 70° Sol−1 (Sol is a Martian day). The regular structure of the wave gives the impression that the classical models of baroclinic instability, which describe the underlying process by a temporally unstable global wave (e.g., Eady model and Charney model), may have a direct relevance for the description of the Martian baroclinic waves. The results of the diagnostic calculations show, however, that while the Martian waves remain zonally global features at all times, there are large spatiotemporal changes in their amplitude. The most intense episodes of baroclinic energy conversion, which take place in the two great plain regions (Acidalia Planitia and Utopia Planitia), are strongly localized in both space and time. In addition, similar to the situation for terrestrial baroclinic waves, geopotential flux convergence plays an important role in the dynamics of the downstream-propagating unstable waves.
Vertical Temperature Profiles at Maximum Entropy Production with a Net Exchange Radiative Formulation*
Authors: Herbert Corentin , Paillard Didier , Dubrulle Bérengère 
Published: July 2013

AbstractLike any fluid heated from below, the atmosphere is subject to vertical instability that triggers convection. Convection occurs on small time and space scales, which makes it a challenging feature to include in climate models. Usually subgrid parameterizations are required. Here, an alternative view based on a global thermodynamic variational principle is developed. Convective flux profiles and temperature profiles at steady state are computed in an implicit way by maximizing the associated entropy production rate. Two settings are examined, corresponding respectively to an idealized case of a gray atmosphere and a realistic case based on a net exchange formulation radiative scheme. In the second case, the effect of variations of the atmospheric composition, such as a doubling of the carbon dioxide concentration, is also discussed.
Cardiac magnetic resonance, transthoracic and transoesophageal echocardiography: a comparison of in vivo assessment of ventricular function in rats
Authors: Richardson JD , Bertaso AG , Frost L , Psaltis PJ , Carbone A , Koschade B , Wong DT , Nelson AJ , Paton S , Williams K , Azarisman S , Worthley MI , Teo KS , Gronthos S , Zannettino ACW , Worthley SG 
Published: July 2013

In vivo assessment of ventricular function in rodents has largely been restricted to transthoracic echocardiography (TTE). However 1.5 T cardiac magnetic resonance (CMR) and transoesophageal echocardiography (TOE) have emerged as possible alternatives. Yet, to date, no study has systematically assessed these three imaging modalities in determining ejection fraction (EF) in rats. Twenty rats underwent imaging four weeks after surgically-induced myocardial infarction. CMR was performed on a 1.5 T scanner, TTE was conducted using a 9.2 MHz transducer and TOE was performed with a 10 MHz intracardiac echo catheter. Correlation between the three techniques for EF determination and analysis reproducibility was assessed. Moderate-strong correlation was observed between the three modalities; the greatest between CMR and TOE (intraclass correlation coefficient (ICC) = 0.89), followed by TOE and TTE (ICC = 0.70) and CMR and TTE (ICC = 0.63). Intra- and inter-observer variations were excellent with CMR (ICC = 0.99 and 0.98 respectively), very good with TTE (0.90 and 0.89) and TOE (0.87 and 0.84). Each modality is a viable option for evaluating ventricular function in rats, however the high image quality and excellent reproducibility of CMR offers distinct advantages even at 1.5 T with conventional coils and software.
Psychometric Properties of Patient-Reported Outcome Measures for Hip Arthroscopic Surgery
Authors: Kemp Joanne L. , Collins Natalie J. , Roos Ewa M. , Crossley Kay M. 
Published: July 2013

Background: Patient-reported outcomes (PROs) are considered the gold standard when evaluating outcomes in a surgical population. While the psychometric properties of some PROs have been tested, the properties of newer PROs in patients undergoing hip arthroscopic surgery remain somewhat unknown. Purpose: To evaluate the reliability, validity, responsiveness, and interpretability of 5 PROs (Copenhagen Hip and Groin Outcome Score [HAGOS], Hip Disability and Osteoarthritis Outcome Score [HOOS], Hip Outcome Score [HOS], International Hip Outcome Tool [iHOT-33], and Modified Harris Hip Score [MHHS]) in a population undergoing hip arthroscopic surgery and also to provide a recommendation of the best PROs in patients undergoing hip arthroscopic surgery. Study Design: Cohort study (diagnosis); Level of evidence, 2. Methods: Study participants were adults (mean age, 37 ± 11 years) who had undergone hip arthroscopic surgery 12 to 24 months previously and pain-free, healthy age-matched controls (mean age, 35 ± 11 years). Baseline characteristics including age, height, weight, waist girth, physical activity, and occupation were collected for both groups. The hip arthroscopic surgery group completed the 5 PRO questionnaires on 3 occasions, while the healthy control group completed the PRO questionnaires on 1 occasion. The reliability (test-retest reliability [intraclass correlation coefficient, or ICC] and minimal detectable change [MDC]), validity (construct validity, ability to detect a difference between groups, acceptability including floor and ceiling effects), responsiveness, and interpretability (minimal important change [MIC]) of each measure were calculated. Results: The test-retest reliability of PROs was excellent (ICC, 0.91-0.97), with an MDC of <20%. The HOOS, HAGOS, and iHOT-33 had acceptable content validity. All PROs demonstrated construct validity and were able to detect a difference between the hip arthroscopic surgery and control groups. No measures demonstrated a floor effect; however, the MHHS and subscales relating to activities of daily living of the HOOS, HOS, and HAGOS demonstrated a ceiling effect. The HOOS, iHOT-33, and MHHS demonstrated adequate responsiveness, and the MIC for all measures was <11 points of a possible 100 points. Conclusion: The PROs of the HOOS and iHOT-33 demonstrate psychometric properties that may enable researchers and clinicians to use them with confidence in a population undergoing hip arthroscopic surgery. The psychometric properties of the MHHS, HOS, and some subscales of the HAGOS are reduced, and these PROs may be less valuable in this group.
The use of complementary and alternative medicine among dermatology outpatients in Eastern Turkey
Authors: Bilgili SG , Ozkol HU , Karadag AS , Calka O 
Published: July 2013

Introduction: Over the past decade, complementary and alternative medicine (CAM) has become increasingly popular around the world. Objectives: In this study, we aim to investigate how frequently CAM is used and the types of CAM methods used for dermatological disease in Eastern Turkey. Materials and methods: We recruited 1610 patients from our clinic for this study. The sociodemographic features and the CAM methods were investigated with a survey. Results: The most common dermatological disorders included contact dermatitis (21.4%), acne vulgaris (17.5%), fungal infections (10.9%), eczema (6.3%), and warts (5.7%). The ratio of patients using at least one CAM method was 43.7% and that of those using two or more CAM methods was 20.8%. The most commonly used CAM methods were those using henna, cologne, moisturizing cream, prayer, and herbal therapy. Some patients were found to use some interesting and unusual CAM methods, such as putting out a cigarette over the skin on the back for anthrax, applying raw meat for furuncle, using fuel oil and nitric acid for contact dermatitis. Conclusions: CAM methods are commonly used in our population. CAM methods often cause adverse reactions that may alter diagnostic skin findings and interfere with the efficacy of other medical therapies. Therefore, physicians should ask their patients about the use of CAM methods while collecting patient history. Physicians have a critical role in preventing improper use of CAM. In addition, further investigations into the efficacy, benefits, and risks of CAM methods should be carried out for better insight into those CAM methods.