bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evaluation of the Southern Ocean O2/Ar‐based NCP estimates in a model framework
Authors: Jonsson Bror F. , Doney Scott C. , Dunne John , Bender Michael 
Published: February 2013

AbstractThe sea‐air biological O2 flux assessed from measurements of surface O2 supersaturation in excess of Ar supersaturation (“O2 bioflux”) is increasingly being used to constrain net community production (NCP) in the upper ocean mixed layer. In making these calculations, one generally assumes that NCP is at steady state, mixed layer depth is constant, and there is no O2 exchange across the base of the mixed layer. The object of this paper is to evaluate the magnitude of errors introduced by violations of these assumptions. Therefore, we examine the differences between the sea‐air biological O2 flux and NCP in the Southern Ocean mixed layer as calculated using two ocean biogeochemistry general circulation models. In this approach, NCP is considered a known entity in the prognostic model, whereas O2 bioflux is estimated using the model‐predicted O2/Ar ratio to compute the mixed layer biological O2 saturation and the gas transfer velocity to calculate flux. We find that the simulated biological O2 flux gives an accurate picture of the regional‐scale patterns and trends in model NCP. However, on local scales, violations of the assumptions behind the O2/Ar method lead to significant, non‐uniform differences between model NCP and biological O2 flux. These errors arise from two main sources. First, venting of biological O2 to the atmosphere can be misaligned from NCP in both time and space. Second, vertical fluxes of oxygen across the base of the mixed layer complicate the relationship between NCP and the biological O2 flux. Our calculations show that low values of O2 bioflux correctly register that NCP is also low (<10 mmol m−2 day−1), but fractional errors are large when rates are this low. Values between 10 and 40 mmol m−2 day−1 in areas with intermediate mixed layer depths of 30 to 50 m have the smallest absolute and relative errors. Areas with O2 bioflux higher than 30 mmol m−2 day−1 and mixed layers deeper than 40 m tend to underestimate NCP by up to 20 mmol m−2 day−1. Excluding time periods when mixed layer biological O2 is undersaturated, O2 bioflux underestimates time‐averaged NCP by 5%–15%. If these time periods are included, O2 bioflux underestimates mixed layer NCP by 20%–35% in the Southern Ocean. The higher error estimate is relevant if one wants to estimate seasonal NCP since a significant amount of biological production takes place when mixed layer biological O2 is undersaturated.
Knee extensor and flexor dominant gait patterns increase the knee frontal plane moment during walking
Authors: Kulmala Juha‐Pekka , Äyrämö Sami , Avela Janne 
Published: February 2013

AbstractHigh gait‐induced knee frontal plane moment is linked with the development of knee osteoarthritis. Gait patterns across the normal population exhibit large inter‐individual variabilities especially at the knee sagittal plane moment profile during loading response and terminal stance phase. However, the effects of different gait patterns on this moment remain unknown. Therefore, we examined whether different gait patterns are associated with atypically high knee frontal plane moments. Profiles of knee joint moments divided a sample of 24 subjects into three subgroups (11, 7, 6) through cluster analysis. Kinetics, kinematics, and spatio‐temporal parameters were compared among clusters. Subjects who showed a typical sagittal plane moment pattern (n = 11) had 43% lower first peak of knee frontal plane moment compared to the cluster, which showed the dominance of the knee extensor moment during stance phase (n = 7, p < 0.01). In addition, a typical gait pattern cluster had 44% lower second peak knee frontal plane moment than the cluster, which showed the dominance of the knee flexor moment during the terminal stance phase (n = 6, p < 0.05). These findings indicate that different knee strategies driving gait considerably impact knee loading, suggesting that knee extensor and flexor dominant gait patterns demonstrate atypically high knee frontal plane moments. People in these subgroups may, therefore, be at higher risk of developing knee osteoarthritis. © 2013 Orthopaedic Research Society Published by Wiley Periodicals, Inc. J Orthop Res 31:1013–1019, 2013
White matter abnormalities in Parkinson's disease patients with glucocerebrosidase gene mutations
Authors: Agosta Federica , Kostic Vladimir S. , Davidovic Kristina , Kresojević Nikola , Sarro Lidia , Svetel Marina , Stanković Iva , Comi Giancarlo , Klein Christine , Filippi Massimo 
Published: February 2013

ABSTRACTGlucocerebrosidase gene mutations represent a genetic risk factor for the development of Parkinson's disease. This study investigated brain alterations in Parkinson's disease patients carrying heterozygous glucocerebrosidase gene mutations using structural and diffusion tensor magnetic resonance imaging. Among 360 Parkinson's disease patients screened for glucocerebrosidase gene mutations, 19 heterozygous mutation carriers (5.3%) were identified. Of these, 15 patients underwent a neuropsychological evaluation and a magnetic resonance imaging scan. Sixteen age‐ and sex‐matched healthy controls and 14 idiopathic Parkinson's disease patients without glucocerebrosidase gene mutations were also studied. Tract‐based spatial statistics was used to perform a white matter voxel‐wise analysis of diffusion tensor magnetic resonance imaging metrics. Mean fractional anisotropy values were obtained from white matter tracts of interest. Voxel‐based morphometry was used to assess gray‐matter atrophy. Cognitive deficits were found in 9 mutation carrier patients (60%). Compared with controls, Parkinson's disease patients carrying glucocerebrosidase gene mutations showed decreased fractional anisotropy in the olfactory tracts, corpus callosum, and anterior limb of the internal capsule bilaterally, as well as in the right anterior external capsule, and left cingulum, parahippocampal tract, parietal portion of the superior longitudinal fasciculus, and occipital white matter. Mutation carrier patients also had decreased fractional anisotropy of the majority of white matter tracts compared with Parkinson's disease patients with no mutations. No white matter abnormalities were found in Parkinson's disease patients without glucocerebrosidase gene mutations. No gray matter difference was found between patients and controls. In Parkinson's disease patients, verbal fluency scores correlated with white matter abnormalities. Parkinson's disease patients carrying glucocerebrosidase gene mutations experience a distributed pattern of white matter abnormalities involving the interhemispheric, frontal corticocortical, and parahippocampal tracts. White matter pathology in these patients may have an impact on the clinical manifestations of the disease, including cognitive impairment. © 2013 Movement Disorder Society
Synthesis and characterization of phenanthrocarbazole–diketopyrrolopyrrole copolymer for high‐performance field‐effect transistors
Authors: Chen Huajie , Guo Yunlong , Sun Xiangnan , Gao Dong , Liu Yunqi , Yu Gui 
Published: February 2013

AbstractIn this study, we successfully designed and synthesized a novel phenanthro[1,10,9,8‐c,d,e,f,g]carbazole (PCZ)‐based copolymer poly[N‐(2‐octyldodecyl)‐4,8‐phenanthro[1,10,9,8‐c,d,e,f,g]carbazole‐alt‐2,5‐dihexadecyl‐3,6‐di(thiophen‐2‐yl)pyrrolo[3,4‐c]pyrrole‐1,4(2H,5H)‐dione] (PPDPP) with an extended π‐conjugation along the vertical orientation of polymer main chain. This polymer exhibited excellent solubility in common solvent and high thermal stability, owning good properties for solution‐processed field‐effect transistors (FETs). Besides, absorption spectra demonstrated that annealing PPDPP thin films led to obviously red‐shifted maxima, indicating the formations of aggregation or orderly π–π stacking in their solid‐state films. X‐ray diffraction measurements indicated the crystallinity of PPDPP thin films was enhanced after high temperature annealing, which was favorable for charge transport. The solution‐processed PPDPP‐based FET devices were fabricated with a bottom‐gate/bottom‐contact geometry. A high hole mobility of up to 0.30 cm2/Vs and a current on/off ratio above 105 had been demonstrated. These results indicated that the copolymers constructed by this kind of ladder‐type cores could be promising organic semiconductors for high‐performance FET applications. © 2013 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013
Peer cluster: a maximum flow‐based trust mechanism in P2P file sharing networks
Authors: Fan Xinxin , Li Mingchu , Zhao Hui , Chen Xiaodong , Guo Zhenzhou , Jiao Dong , Sun Weifeng 
Published: February 2013

ABSTRACTTrust mechanism has become a research focus in recent years as a novel and valid way to ensure the transaction security in peer‐to‐peer file sharing networks. Nevertheless, some fundamental challenges still exist, for example: How can malicious peers be effectively isolated? How can various threats of manipulation by strategic peers be resisted? What strategy should be used to ensure that the service providers are authentic peers? Considering these challenges in our minds, in this paper, we propose a new trust mechanism based on the maximum flow theory. We firstly add a few prestigious peers into a cluster as the original members according to their transaction behaviors in a period; then, we perform maximum flow algorithm and identify those peers that still link from (to) the peers in the cluster as new members, which is carried out repeatedly, and almost every normal peer would finally become the member of the cluster. Each request peer has the priority to select downloading sources from this cluster according to our trust mechanism. In this way, the malicious peers are isolated, and their transaction behaviors are also confined largely even though they have high reputation. Extensive experimental results confirm the efficiency of our trust mechanism against the threats of exaggeration, cheat, collusion, and disguise. Copyright © 2013 John Wiley & Sons, Ltd.
Late Quaternary slip rate of the South Heli Shan Fault (northern Hexi Corridor, NW China) and its implications for northeastward growth of the Tibetan Plateau
Authors: Zheng Wen‐Jun , Zhang Pei‐Zhen , Ge Wei‐Peng , Molnar Peter , Zhang Hui‐Ping , Yuan Dao‐Yang , Liu Jian‐Hui 
Published: February 2013

AbstractBased on field investigations, aerial‐photo morphological analysis, topographic profiling, and optically stimulated luminescence (OSL) dating of alluvial surfaces, we estimate vertical components of the slip rate along the South Heli Shan thrust fault, which lies on the northern margin of the Hexi Corridor and the northeastern edge of the Tibetan Plateau. The fault consists of three segments with scarp heights ranging from less than 1 m to more than 16 m. OSL dating indicates that most of the alluvial fans cut by fault scarps formed during the transition from the last glacial stage to the present interglacial stage from ~19 to ~9 ka along southern Heli Shan and from ~27 ka to ~22 ka along its northern margin. In addition, remnants of older alluvial fan have been abandoned after ~67 ka. Scarp heights increase from west to east and reach a maximum of more than 16 m near the eastern end. Using three approaches, we calculate late Quaternary slip rates for each of the three fault segments along the southern margin and the fault on the northern flank. These approaches yield maximum vertical slip rates from 0.18 to 0.2 mm/a for the western segment, 0.3 to 0.43 mm/a for the central segment, 0.36 to 0.53 mm/a for the eastern segment, and 0.21 mm/a for the Wutongjing Fault, which lies on the north side of the Heli Shan. For a range of likely fault dips, these correspond to 0.1–0.2 mm/a of average horizontal shortening for the western segment, and increase to 0.4–0.5 mm/a across the eastern segment of the southern Heli Shan Fault. Combining the height of the eastern parts of the Heli Shan (Daqing Peak) above the Hei He (a major river that incised the western end of the range) and the vertical component of the slip rate of the eastern segment, we suggest that the Heli Shan was uplifted by motion on the South Heli Shan Fault beginning sometime between 1 and 4 Ma, most likely since ~2 Ma. This age suggests that the Tibetan Plateau continues to grow northeastward across the Hexi Corridor.
Balancing practicality and hydrologic realism: A parsimonious approach for simulating rapid groundwater recharge via unsaturated‐zone preferential flow
Authors: Mirus Benjamin B. , Nimmo John R. 
Published: February 2013

Key Points
Unsaturated preferential flow is generally underestimated
A simple model can simulate rapid water table fluctuations
The model provides useful flux estimates and requires limited data inputs
Making the distinction between water scarcity and drought using an observation‐modeling framework
Authors: Van Loon A. F. , Van Lanen H. A. J. 
Published: February 2013

Key Points
Observation‐modeling framework is needed to discern water scarcity and drought.
Anomaly analysis on observed and naturalized time series allows quantification.
In a case study, water scarcity had a four times higher impact than drought.
Sex and Common-Sense: Maude Royden, Religion, and Modern Sexuality
Authors: Morgan Sue 
Published: February 2013

AbstractThis article explores the relationship between religion, sexuality, and modernity through a study of the important yet neglected text Sex and Common-Sense (1921) by the celebrated Anglican feminist preacher, pacifist, and campaigner for women's ordination, Maude Royden (1876–1956). It argues for the ongoing vitality of religious constructions of sexual identity in interwar Britain and the deeply symbiotic rather than oppositional relationship between Christian and secular (scientific) discourses during this period. Royden's engagement with the new sexological and psychological approaches to the self and sexuality is examined, as are her efforts to modernize religious understandings of sexuality through a more compassionate, progressive reading of women's capacity for sexual pleasure, marriage reform, divorce, birth control, and homosexuality. The centrality of her High Church incarnational theology to an understanding of sex as sacramental is also assessed. The article proposes that histories of sexuality and histories of religion have hitherto worked with differing chronologies of secularization that have had interesting implications not only for the recognition of religion's continued influence in shaping mainstream British sexual morality but also for the uneven and multifarious readings of modernity itself.
Strikers and the Right to Poor Relief in Late Victorian Britain: The Making of theMerthyr TydfilJudgment of 1900
Authors: Croll Andy 
Published: February 2013

AbstractDid late Victorian strikers have a right to poor relief? Historians have suggested they did not. Scholars point out that nineteenth-century strikers rarely turned to the Poor Law for assistance, and when they did, during a colliers' strike in South Wales in 1898, Poor Law officials were taken to court by disgruntled coal companies. In the subsequent High Court ruling known as theMerthyr Tydfiljudgment of 1900, the Master of the Rolls decided that the policy of relieving the strikers had indeed been unlawful. However, it is argued in this article that the judgment has not been properly understood by historians. Contemporaries did not think it obvious that the giving of poor relief to strikers was illegal. On the contrary, in 1898, there was widespread agreement that Poor Law officials had no choice but to support destitute strikers; the Poor Lawdemandedthey relieve the men and their families, a point confirmed in an earlier High Court ruling in 1899. Thus, Poor Law scholars should view theMerthyrjudgment as a notable innovation in Poor Law policy. Labor historians should see the ruling as part of the employers' counteroffensive against the labor movement of the 1890s and 1900s.Merthyrcame out of the same febrile atmosphere that produced theTaff Valejudgment. That its true significance has been forgotten can largely be explained by the labor movement's unease at having a striker's right to poor relief confirmed in 1899. Respectable workers, union leaders averred, should not be supported out of the poor rates.
JEŚMANOWICZ’ CONJECTURE REVISITED
Authors: TANG MIN , YANG ZHI-JUAN 
Published: February 2013

AbstractLet $a, b, c$ be relatively prime positive integers such that ${a}^{2} + {b}^{2} = {c}^{2} $. In 1956, Jeśmanowicz conjectured that for any positive integer $n$, the only solution of $\mathop{(an)}\nolimits ^{x} + \mathop{(bn)}\nolimits ^{y} = \mathop{(cn)}\nolimits ^{z} $ in positive integers is $(x, y, z)= (2, 2, 2)$. In this paper, we consider Jeśmanowicz’ conjecture for Pythagorean triples $(a, b, c)$ if $a= c- 2$ and $c$ is a Fermat prime. For example, we show that Jeśmanowicz’ conjecture is true for $(a, b, c)= (3, 4, 5)$, $(15, 8, 17)$, $(255, 32, 257)$, $(65535, 512, 65537)$.
Between Digestion and Desire: Genealogies of food in nationalist North India
Authors: BERGER RACHEL 
Published: February 2013

AbstractThis paper takes up the project of conceptualizing a new history of food in India through an exploration of conversations about food, digestion, desire, and embodiment that took place in Hindi-language publications in early-twentieth century North India. Through an exploration of cookbooks, guides to health and wellness, and food advertising spanning the 1920s to the 1940s, conversations about food preparation, consumption, and distribution come to be revealed as significant anchors of historical, political, economic, and cultural debates about the Indian nation in this period. The centrality of food to conversations that took up the reproduction and regeneration of the Hindu middle class helped to conceptualize an idealized Indian nation[A]. Subsequently, the focus on food advertising imagined the transformation of these citizens into consumers. Moving beyond the colonial fascination with native bodies and tropical constitutions, this paper demonstrates the ways in which the conversations that emerged out of a focus on food in popular culture did the work of envisioning new possibilities for post-colonial embodiment.
Lymphoedema: causes, prevention and management in older people
Authors: Piller Neil 
Published: February 2013

SummaryThe lymphatic system must have variation in tissue pressure to load it and to help flow. Being a low pressure system, external pressure must not be constantly high on any segment and there must be a pressure gradient along it. When the flow rate of lymph fails there can be compromised immunity, a tendency to deposit fat, fibrotic induration, and a vicious cycle of worsening of cellular and organ health often associated with recurrent infection.As we age we become less active, lose muscle tone, and increase our weight, develop a higher percentage of body fat, and may have poor skin care and be prescribed medications which impact on lymphatic load. Combined with this, the tendency to immobility, limb dependency and periods of time when high external pressures exist in small superficial areas increase the risk of or contribute to lymphoedema through reducing lymphatic flow. Older people are more likely to have had more radical surgery and radiotherapy for cancer with more significant damage to their lymphatic systems, again adding to lymphoedema risk. Immobility, hypertension, venous disease, kidney and liver failure can lead to oedema, while thyroid dysfunction can cause myxedema, and genetic or metabolic issues can cause lipoedema, compounding the clinical problems.A key point in good management is early identification and accurate diagnosis. Ideally, other issues that especially impact on lymphatic load should be managed prior to targeted and sequenced treatment for the swelling, with the aim being to improve patient comfort. Management can involve the patient, partner, family or carer as well as a range of health professionals to help reduce or maintain limb size, appearance and function as well as reduce symptoms of heaviness, tension and discomfort and a range of other issues that impact on quality of life and activities of living.
Hospital Ships Adrift? Part 1: A Systematic Literature Review Characterizing US Navy Hospital Ship Humanitarian and Disaster Response, 2004-2012
Authors: Licina Derek 
Published: February 2013

AbstractBackgroundUnited States foreign policy is tied extensively to health initiatives, many related to the use of military assets. Despite substantial resource investment by the US Department of Defense (DoD) in hospital ship humanitarian assistance and disaster response missions, the impact of this investment is unclear.MethodsA systematic literature review of both peer-reviewed and grey literature using eight databases representing the international community and multiple sectors was conducted. Data on the characteristics of missions directly related to US Navy hospital ship humanitarian assistance and disaster response from 2004-2012 were extracted and documented.ResultsOf the 1445 sources reviewed, a total of 43 publications met criteria for review. Six (13.9%) met empirical documentation criteria and 37 (86.0%) were considered nonempirical expert opinions and anecdotal accounts that were primarily descriptive in nature. Overall, disaster response accounted for 67.4% (29/43) and humanitarian assistance 25.6% (11/43). Public and private sector participants produced 79.0% (34/43) and 20.9% (9/43) of the publications respectively. Of private sector publications, 88.9% (8/9) focused on disaster response compared to 61.8% (21/34) from the public sector. Of all publications meeting inclusion criteria, 81.4% (35/43) focused on medical care, 9.3% (4/43) discussed partnerships, 4.7% (2/43) training, and 4.7% (2/43) medical ethics and strategic utilization. No primary author publications from the diplomatic, development, or participating host nations were identified. One (2.3%) of the 43 publications was from a partner nation participant.DiscussionWithout rigorous research methods yielding valid and reliable data-based information pertaining to Navy hospital ship mission impact, policy makers are left with anecdotal reports to influence their decision-making processes. This is inadequate considering the frequency of hospital ship deployments used as a foreign policy tool and the considerable funding that is involved in each mission. Future research efforts should study empirically the short- and long-term impacts of hospital ship missions in building regional and civil-military partnerships while meeting the humanitarian and disaster response needs of host nation populations.LicinaD.Hospital ships adrift? Part 1: a systematic literature review characterizing US Navy hospital ship humanitarian and disaster response, 2004-2012.Prehosp Disaster Med.2013;28(3):1–10..