bluuebunny/crossref_metadata_2025_split huggingface dataset:
A REGIONAL CLASSIFICATION OF UNREGULATED STREAM FLOWS: SPATIAL RESOLUTION AND HIERARCHICAL FRAMEWORKS
Authors: McManamay Ryan A. , Orth Donald J. , Dolloff Charles A. , Frimpong Emmaneul A. 
Published: February 2011

ABSTRACTRiver regulation has resulted in substantial losses in habitat connectivity, biodiversity and ecosystem services. River managers are faced with a growing need to protect the key aspects of the natural flow regime. A practical approach to providing environmental flow standards is to create a regional framework by classifying unregulated streams into groups of similar hydrologic properties, which represent natural flow regime targets. Because spatial resolution can influence the structure of regional datasets, it may be advantageous to relate datasets created at different scales in order to establish hierarchical structure and to understand how the relative importance of variables change with regard to scale. The purpose of this study was to classify unregulated streams within an eight‐state region into groups in order to provide environmental flow standards for managers and to relate that dataset to frameworks created at larger scales. Using USGS daily stream gauge information, we used 66 hydrologic statistics to classify 292 streams in groups of similar hydrologic properties. We isolated six flow classes in a sub‐region of the Southeastern US that ranged from extremely stable to highly variable to intermittent. We developed classification trees to reduce the number of hydrologic variables for future classifications. By comparing flow classes in our study to those of the entire US, we found that hierarchical structure did exist and that the divergence of flow classes will largely depend on the spatial resolution. Copyright © 2011 John Wiley & Sons, Ltd.
Boards, CEOs, and surviving a financial crisis: Evidence from the internet shakeout
Authors: Dowell Glen W. S. , Shackell Margaret B. , Stuart Nathan V. 
Published: February 2011

AbstractWe examine whether corporate governance matters more for firms facing financial distress. We theorize that financial crisis changes the relative costs and benefits of governance mechanisms and that more independent and smaller boards become more valuable in distressed firms. We further hypothesize that CEO power becomes increasingly beneficial as concentrated power allows the firm to respond more rapidly to the crisis. Event‐history analysis of the failure of publicly traded Internet firms over the period 2000–2002 confirms our hypotheses. Our results suggest that the association between governance and survival depends on firm and environmental context and that one‐size‐fits‐all prescriptions for governance mechanisms are therefore likely to be ineffective. Copyright © 2011 John Wiley & Sons, Ltd.
The benefits of geographic sales diversification: How exporting facilitates capital investment
Authors: Myles Shaver J. 
Published: February 2011

AbstractMany strategic investments require firms to make upfront outlays to generate profits at a later date. When firms have limited access to external capital, they have to rely on internally generated funds for these investments. In this case, their strategic investments are constrained by cash flow. I predict that by geographically diversifying sales (i.e., exporting), firms can relax this constraint because exporting signals more stable expected cash flows and firm quality, which can increase external capital providers' willingness to fund investments. Examining a representative sample of Spanish manufacturers from 1990 to 1998, I find support that exporting mitigates investment liquidity constraints allowing firms to make strategic investments they would not otherwise be able to make. This highlights how diversification can be a strategy to create and maintain competitive advantage. Copyright © 2011 John Wiley & Sons, Ltd.
A Nanochannel/Nanoparticle‐Based Filtering and Sensing Platform for Direct Detection of a Cancer Biomarker in Blood
Authors: de la Escosura‐Muñiz Alfredo , Merkoçi Arben 
Published: February 2011

AbstractA rapid nanochannel‐based immunoassay capable of the filtering and subsequent detection of proteins in whole blood without any sample preparation is described. This is accomplished by using a nanoporous/nanochannel membrane modified with antibodies, the conductivity of which toward a redox indicator is tuned by primary and secondary immunoreactions with proteins and gold nanoparticles. This interesting nanopore blockage by gold nanoparticles is enhanced by silver deposition that further decreases the diffusion of the signaling indicator through the nanochannel. The efficiency of the nanochannels to act as immunoreaction platforms including the use of nanoparticles is also monitored by microscopic techniques. Successful detection of immunoglobulins including a cancer biomarker is achieved in buffer as well as in whole blood. This system constitutes an efficient immunoassay capable of detecting up to 52 U mL−1 of CA15‐3. The developed nanochannel/nanoparticle‐based device can be used for several other proteins and extended also to DNA detection with interest not only for diagnostics but also environmental monitoring, food analysis, safety, and security applications.
E‐MAC: an elastic MAC layer for IEEE 802.11 networks
Authors: Wei Qing , Aad Imad , Scalia Luca , Widmer Jörg , Hofmann Philipp , Loyola Luis 
Published: February 2011

ABSTRACTWe present a system for real‐time traffic support in infrastructure and ad hoc IEEE 802.11 networks. The proposed elastic MAC (E‐MAC) protocol provides a distributed transmission schedule for stations with real‐time traffic requirements, while allowing a seamless coexistence with standard IEEE 802.11 clients, protecting best‐effort 802.11 traffic from starvation by means of admission control policies. Our scheduling decisions are based on an ‘elastic’ transmission opportunity (TXOP) assignment which allows for efficient wireless resource usage: whenever a real‐time station does not use the assigned TXOP, the other real‐time stations can take over the unused access opportunity, thus preventing the well‐known inefficiencies of static time division multiple access (TDMA) schemes. Unlike other TDMA‐based solutions for 802.11, E‐MAC does not require a tight synchronization among the participating clients, thus allowing its implementation on commodity WLAN hardware via minor software changes at the client side, and no changes at the access points (APs). We studied the performance of our mechanism via ns‐2 simulations and a mathematical model, showing that it outperforms IEEE 802.11e in terms of throughput, delay, and jitter. We finally provide a proof of concept through the results obtained in a real testbed where we implemented the E‐MAC protocol. Copyright © 2011 John Wiley & Sons, Ltd.
The Inverse Perovskite (Ca2EuNx)Sn: A Rare Example for a Homogeneously Mixed‐Valent Compound?
Authors: Gäbler Frank , Bräunling Daniel , Schnelle Walter , Schellenberg Inga , Pöttgen Rainer , Niewa Rainer 
Published: February 2011

AbstractThe cubic Perovskite (Ca2EuN0.75)Sn was synthesized in a solid state reaction from EuN, Ca, and Sn. Nitrogen deficiency and Ca/Eu disorder is in agreement with results from chemical analysis, X‐ray diffraction, and Mössbauer spectroscopy. Magnetic susceptibility measurements as well as Mössbauer and X‐ray absorption spectroscopy indicate a mixed‐valent situation with di‐ and trivalent europium, apparently situated together with calcium on one crystallographic site. According to electrical resistivity measurements the title compound represents a heavily doped semiconductor.
Cooperative Action of Cellulase Enzyme and Carboxymethyl Cellulose on Cotton Fabric Cleanability from a Topographical Standpoint
Authors: Calvimontes Alfredo , Lant Neil J. , Dutschk Victoria 
Published: February 2011

AbstractIn this study, the effect of cotton treatment with cellulose and carboxymethyl cellulose on soil release of three different types of fabric: woven plain, woven twill and knitted were systematically studied. A recent study of the effect of a cleaning cellulase enzyme on cellulose films has proven that this substance selectively attacks amorphous cellulose regions, consisting of small hills in a matrix of flat crystalline regions. According to our previous investigations, where carboxymethyl cellulose is present in the formula, the enzyme seems to drive soil release performance. However, the mechanism has not yet been sufficiently studied from the topographical standpoint. In the present study, topographical changes caused by the treatment with cleaning cellulase enzyme and carboxymethyl cellulose on the fabrics by conditioning while washing were analysed on three different length scales in order to interpret their cooperation on water and oil absorption mechanisms and, hence, on cleanability of cotton fabrics stained with liquid–solid, liquid and solid soils.
Synthesis, Characterization and Surface Activity of New Eco‐friendly Schiff Bases Vanillin Derived Cationic Surfactants
Authors: Negm Nabel A. , Kandile Nadia G. , Mohamad Mohamad A. 
Published: February 2011

AbstractThree eco‐friendly cationic surface active agents were synthesized from the chemical modification of vanillin. The chemical structures of these surfactants were confirmed using elemental analysis, IR and NMR spectra. The surface activity measurements showed their high tendency towards adsorption and micellization and their good surface tension reduction, low interfacial tension. The emulsion stability measurements showed acceptable efficiency as emulsifying agents for short term emulsions. The biodegradability tests revealed that these compounds are eco‐friendly and had completely degraded in 30 days.
The elements of human cyclin D1 promoter and regulation involved
Authors: Guo Zhi-yi , Hao Xiao-hui , Tan Fei-Fei , Pei Xin , Shang Li-Mei , Jiang Xue-lian , Yang Fang 
Published: February 2011

Abstract
Cyclin D1 is a cell cycle machine, a sensor of extracellular signals and plays an important role in G1-S phase progression. The human cyclin D1 promoter contains multiple transcription factor binding sites such as AP-1, NF-қB, E2F, Oct-1, and so on. The extracellular signals functions through the signal transduction pathways converging at the binding sites to active or inhibit the promoter activity and regulate the cell cycle progression. Different signal transduction pathways regulate the promoter at different time to get the correct cell cycle switch. Disorder regulation or special extracellular stimuli can result in cell cycle out of control through the promoter activity regulation. Epigenetic modifications such as DNA methylation and histone acetylation may involved in cyclin D1 transcriptional regulation.
CAREGIVERS' ATTITUDES AND PRACTICES: INFLUENCE ON CHILDHOOD BODY WEIGHT
Authors: COSTA FABIANA SILVA , PINO DAISY LOPES DEL , FRIEDMAN ROGÉRIO 
Published: February 2011

SummaryChildhood excess weight is probably associated with, or reflected in, parental attitudes. The objective of this study was to study the relationships between childhood excess weight and parental attitudes. The study subjects were 53 boys and 56 girls, aged 6–10, regularly attending schools in Porto Alegre, south Brazil, and one of their parents or caregivers. Attitudes of the parents or caregivers were assessed by the Child Feeding Questionnaire (CFD). Weight and height of the children were measured, parents self-reported their weight and height and body mass indexes were calculated for both. The WHO criteria for overweight and obesity were used for the adults. The CDC criteria for overweight and risk for overweight were used for the corresponding children. Boys presented excess weight more often than girls. The parents of children with excess weight showed higher scores for perceived child weight, concern about child weight, restriction and monitoring. In logistic regression, excess weight in children was associated with perceived child weight, restriction and male sex; pressure to eat was negatively associated with excess BMI. In Porto Alegre, south Brazil, excess body weight in children aged 6–10 is associated with parental perceived child weight and concern about it, monitoring and restriction; being a boy increases the odds of being overweight.
ASSOCIATION BETWEEN HEALTHY LIFE EXPECTANCY AT BIRTH AND CONSANGUINEOUS MARRIAGES IN 63 COUNTRIES
Authors: SAADAT MOSTAFA 
Published: February 2011

SummaryIn order to investigate the association between mean inbreeding coefficient (α) and healthy life expectancy at birth (HALE; years) the present ecological study on 63 countries was done. Statistical analysis showed that HALE negatively and positively correlated with log10α and log10GNI per capita, respectively (p<0.001). It should be noted that log10α and log10GNI per capita were significantly correlated with each other (p<0.001). After controlling for log10GNI per capita, significant negative correlations between log10α and HALE were observed. The countries were stratified according to their GNI per capita into low- and high-income countries. In countries with high income, after controlling for log10GNI per capita, the correlation between HALE at birth and log10α was significant (for males r=−0.399, df=32, p=0.001; for females r=−0.683, df=32, p<0.001). In high-income Asian and African countries, where consanguineous marriage is common, after controlling for log10GNI per capita, the correlation between HALE at birth and log10α was significant (for males r=−0.819, df=8, p=0.004; for females r=−0.936, df=8, p<0.001). It seems that consanguinity influences HALE independent of country income.
Helminth parasites of eastern box turtles (Terrapene carolina carolina) from southern Indiana, USA
Authors: Moraga P. , Kinsella J.M. , Sepúlveda M.S. 
Published: February 2011

AbstractVery little is known about parasitic diseases of eastern box turtles (Terrapene carolina carolina). The objective of this study was to examine the parasitic fauna of eastern box turtles collected from southern Indiana, USA. Turtles (n = 40) were salvaged mostly as road kills from southern Indiana between May and October 2009. Seven species of helminths in total were found parasitizing the gastrointestinal tract, including two digenean trematodes (Brachycoelium salamandrae and Telorchis robustus) and five nematodes (Oswaldocruzia pipiens, Cosmocercoides dukae, Falcaustra affinis, F. chelydrae and Serpinema trispinosus). We report prevalence, abundance and mean intensity of infection for all helminths. Helminths were not found in any other organs examined (heart, gonads, liver, heart, kidney and urinary bladder) and no ectoparasites were found. Overall, mean intensity of infections was low (1–14 parasites/host), suggesting that these parasites are unlikely to be associated with negative health impacts. This constitutes the first study of this kind for Indiana.
The Emergency as Prehistory of the New Indian Middle Class
Authors: RAJAGOPAL ARVIND 
Published: February 2011

AbstractRecent accounts of the National Emergency of 1975–1977 concur that the deviations it represented, while genuine, did not represent any fundamental change on the part of the Indian state, and that the period offers little distinct insight on the post-independence period as a whole. This paper seeks to argue, to the contrary, that the Emergency was a watershed in post-independence history. With its ban on dissent and suspension of constitutional rights, the Emergency sought to suppress all political disturbances to governance. By doing so, it forefronted the problems of postcolonial politics in at least three respects. First, the Emergency demonstrated that coercion was inextricably combined with consent in state-led development. Second, this led to a heavy reliance on practices of communication to redefine coercion and to stage popular consent. Third, in the process, the boundaries of the political were reinforced, emphasizing the friend/enemy difference fundamental to politics. Governance in the aftermath of the Emergency placed an overt reliance on consent over coercion, but in ways that are themselves significant. Categories of culture and community, and related forms of social distinction, gained in importance over earlier developmental distinctions premised on an authoritarian relationship between state and the people. The change meant a shift away from the Nehruvian focus on the economy as the crucial arena of nation-building, involving labour as the key modality of citizenship. Instead, culture and community became the categories that gained political salience in the period of economic liberalization. The mass media were central to this redefinition of the political, multiplying in size and reach, and acquiring market-sensitive forms of address couched in the rhetoric of individual choice. These events, I suggest, are critical to understanding the formation of the new middle class in India, as a category that increasingly defines itself through cultural and consumerist forms of identity, and is less identified with the state.
Double venous drainage in scimitar syndrome. Ideal anatomy for percutaneous complete cure
Authors: Sarquella-Brugada Georgia , Prada Fredy , Mortera Carlos 
Published: February 2011

AbstractCongenital venolobular or scimitar syndrome is a rare congenital cardiopulmonary anomaly consisting in a partial anomalous pulmonary venous drainage, lung hypoplasia, and anomalous systemic arterial supply to the lung. It can associate with other congenital disorders which will confer the clinical presentation and prognosis of these patients. In most of the cases, the therapeutic approach is partial, as anatomy allows only aberrant arterial embolisation. We present a 6-year-old girl with recurrent pulmonary infections, diagnosed as scimitar syndrome with double collector drainage to the inferior caval vein and left atrium, undergoing interventional catheterisation for complete correction of her disorder. The anomalous systemic artery supply was embolised and the anomalous venous drainage was occluded. The patient was asymptomatic during follow-up, which supports the interventional catheterisation approach as a valid therapeutic option in cases of scimitar syndrome with double venous drainage.
A qualitative investigation of adherence to nutritional therapy in malnourished adult AIDS patients in Kenya
Authors: Dibari Filippo , Bahwere Paluku , Le Gall Isabelle , Guerrero Saul , Mwaniki David , Seal Andrew 
Published: February 2011

AbstractObjectiveTo understand factors affecting the compliance of malnourished, HIV-positive adults with a nutritional protocol using ready-to-use therapeutic food (RUTF; Plumpy'nut®).DesignQualitative study using key informant interviews, focus group discussions and direct observations.SettingMinistry of Health HIV/programme supported by Médecins Sans Frontièrs (MSF) in Nyanza Province, Kenya.SubjectsAdult patients (n 46) currently or previously affected by HIV-associated wasting and receiving anti-retroviral therapy, their caregivers (n 2) and MoH/MSF medical employees (n 8).ResultsThirty-four out of forty-six patients were receiving RUTF (8360 kJ/d) at the time of the study and nineteen of them were wasted (BMI < 17 kg/m2). Six of the thirteen wasted out-patients came to the clinic without a caregiver and were unable to carry their monthly provision (12 kg) of RUTF home because of physical frailty. Despite the patients’ enthusiasm about their weight gain and rapid resumption of labour activities, the taste of the product, diet monotony and clinical conditions associated with HIV made it impossible for half of them to consume the daily prescription. Sharing the RUTF with other household members and mixing with other foods were common. Staff training did not include therapeutic dietetic counselling.ConclusionsThe level of reported compliance with the prescribed dose of RUTF was low. An improved approach to treating malnourished HIV-positive adults in limited resource contexts is needed and must consider strategies to support patients without a caregiver, development of therapeutic foods more suited to adult taste, specific dietetic training for health staff and the provision of liquid therapeutic foods for severely ill patients.
Demographic and socio-economic factors related to food intake and adherence to nutritional recommendations in a cohort of pre-school children
Authors: Dubois Lise , Farmer Anna , Girard Manon , Burnier Daniel , Porcherie Marion 
Published: February 2011

AbstractObjectiveTo examine: (i) children's food intake and adherence to both Canada's Food Guide for Healthy Eating and Dietary Reference Intakes; and (ii) the social and demographic factors related to children's food intake.DesignA cross-sectional study.SettingData were obtained through the Quebec Longitudinal Study of Child Development 1998–2010, a representative sample (n2103) of children born in 1998 in the province of Quebec, Canada. Information on energy, macronutrient and food consumption was derived from responses to a 24 h dietary recall interview addressed to children's mothers and day-care staff when the children were 4 years old.SubjectsA total of 1549 children aged 4 years who participated in a nutritional sub-study.ResultsThe mean daily total energy intake was 6360 kJ (1520 kcal) for girls and 6916 kJ (1653 kcal) for boys. For boys and girls alike, energy intake was comprised of approximately 54 % carbohydrates, 31 % fats and 15 % proteins. The mean number of servings consumed from each of the four essential food groups closely approached the dietary recommendations made by Canada's Food Guide for Healthy Eating; however, <2 % of the children in the present study actually met the full dietary guidelines. The dietary intake of pre-school children was associated with socio-economic and demographic factors, most notably mother's level of education, mother's immigrant status and sex of the child.ConclusionsDiet-related disparities associated with socio-economic and demographic factors exist from as early as 4 years of age.
A wide variety of putative extremophiles and large beta-diversity at the Mars Desert Research Station (Utah)
Authors: Direito Susana O.L. , Ehrenfreund Pascale , Marees Andries , Staats Martijn , Foing Bernard , Röling Wilfred F.M. 
Published: February 2011

AbstractHumankind's innate curiosity makes us wonder whether life is or was present on other planetary bodies such as Mars. The EuroGeoMars 2009 campaign was organized at the Mars Desert Research Station (MDRS) to perform multidisciplinary astrobiology research. MDRS in southeast Utah is situated in a cold arid desert with mineralogy and erosion processes comparable to those on Mars. Insight into the microbial community composition of this terrestrial Mars analogue provides essential information for the search for life on Mars: including sampling and life detection methodology optimization and what kind of organisms to expect. Soil samples were collected from different locations. Culture-independent molecular analyses directed at ribosomal RNA genes revealed the presence of all three domains of life (Archaea, Bacteria and Eukarya), but these were not detected in all samples. Spiking experiments revealed that this appears to relate to low DNA recovery, due to adsorption or degradation. Bacteria were most frequently detected and showed high alpha- and beta-diversity. Members of theActinobacteria, Proteobacteria, BacteroidetesandGemmatimonadetesphyla were found in the majority of samples. Archaea alpha- and beta-diversity was very low. For Eukarya, a diverse range of organisms was identified, such as fungi, green algae and several phyla of Protozoa. Phylogenetic analysis revealed an extraordinary variety of putative extremophiles, mainly Bacteria but also Archaea and Eukarya. These comprised radioresistant, endolithic, chasmolithic, xerophilic, hypolithic, thermophilic, thermoacidophilic, psychrophilic, halophilic, haloalkaliphilic and alkaliphilic micro-organisms. Overall, our data revealed large difference in occurrence and diversity over short distances, indicating the need for high-sampling frequency at similar sites. DNA extraction methods need to be optimized to improve extraction efficiencies.