bluuebunny/crossref_metadata_2025_split huggingface dataset:
Self‐organizing life cycle management of mobile ad hoc networks
Authors: Caballero‐Gil Cándido , Caballero‐Gil Pino , Molina‐Gil Jezabel 
Published: March 2012

ABSTRACTA mobile ad hoc network (MANET) is a type of wireless network without any infrastructure, where nodes must adapt to the changing dynamic situations that result from their mobility. Because of the decentralization of nodes and the security needs of communications, management of MANETs must be self‐organized, which is a major research challenge. In order to cope with the intrinsic properties of MANETs, a new decentralized management system for MANETs called Self‐organizing Life Cycle Management (SLCM) is here fully described and evaluated. Regarding security, node authentication is the most critical component of access control in any network and, in particular, in MANETs. Broadcasting is also a fundamental data dissemination mechanism in these networks. Both aspects have received special attention when defining the proposed SLCM system. In particular, both a strong access control algorithm, based on the cryptographic paradigm of zero‐knowledge proofs, and a three‐step broadcast protocol are here defined. This work includes the performance evaluation of the scheme, and the obtained experimental results show that SLCM significantly improves both the quality and the security of life cycle management of self‐organized MANETs. Copyright © 2012 John Wiley & Sons, Ltd.
Efficient and strongly unforgeable identity‐based signature scheme from lattices in the standard model
Authors: Liu Zhenhua , Hu Yupu , Zhang Xiangsong , Li Fagen 
Published: March 2012

ABSTRACTAn identity‐based signature scheme from lattices is constructed. The scheme is obtained from a modification of Agrawal, Boneh, and Boyen's lattice identity‐based encryption scheme. In this construction, we use two distinct trapdoors for finding short bases. One trapdoor enables the real implementation to generate short bases for all lattices. The other trapdoor enables the simulator to generate short bases for all lattices. Furthermore, the generating short bases are used to sample short vectors as signatures. Our scheme is computationally efficient. The scheme's strong unforgeability is proven in the standard model and rests on the hardness of the small integer solution problem. Finally, we extend the basic construction to obtain a hierarchical identity‐based signature scheme. Copyright © 2012 John Wiley & Sons, Ltd.
The Stressful Life Events and Parkinson's Disease: A Case–Control Study
Authors: Vlajinac Hristina , Sipetic Sandra , Marinkovic Jelena , Ratkov Isidora , Maksimovic Jadranka , Dzoljic Eleonora , Kostic Vladimir 
Published: March 2012

AbstractA case–control study was conducted in order to investigate the possible link between stressful life events and Parkinson's disease (PD). A group of 110 consecutive newly diagnosed PD cases treated at the Institute of Neurology, Faculty of Medicine, Belgrade University, was compared with a control group comprising 220 subjects with degenerative joint disease and some diseases of the digestive tract. The case and control subjects were matched by sex, age (±2 years) and place of residence (urban/rural). According to conditional multivariate logistic regression analysis, PD was found to be significantly related to retirement (odds ratio—OR 18.73, 95% confidence interval—95%CI 1.9–175.4), birth of own child (OR 66.22, 95%CI 8.3–526.3) and air raids (OR 5.66, 95%CI 2.4–13.5). The risk of PD significantly increased with the number of stressful events. The results of the present study support the hypothesis that stress may play a role in the development of PD. Copyright © 2012 John Wiley & Sons, Ltd.
Optimization of the batch preparation of starch nanocrystals to reach daily time‐scale
Authors: Le Corre Déborah , Bras Julien , Choisnard Luc , Dufresne Alain 
Published: March 2012

AbstractCurrent environmental concerns have turned starch nanocrystals (SNC) into candidates of growing interest as bio‐nanofillers for nanocomposite applications. However, despite previous drastic optimization, the main drawbacks for the more extensive use of SNC remain (i) the preparation duration (5 days) and (ii) their relatively low yield (15%). Also, the final suspension of SNC actually contains both nanocrystals and microparticles. Thus, previous study optimized the SNC‐containing suspension yield, rather than the SNC yield. As an attempt to (i) further limit preparation time (to 1 day) and (ii) increase the yield of SNC assessed after filtration (as opposed to that of the heterogeneous SNC‐containing suspension), a response surface methodology (RSM) analysis has been undertaken. The modeling of size and sulfate content was not possible. On the contrary, a linear model with first‐order interactions was postulated for SNC mass yields. The model postulated to fit the SNC yield of the filtered suspension (1 µm) was more descriptive and predictive than that of the current poorly filtered suspension. Opposite effects for the same parameters have been evidenced. This confirmed the need to better isolate SNC, not only before use, but also for better modeling and optimization.
The role of the social cost of carbon in policy
Authors: Rose Steven K. 
Published: March 2012

AbstractEstimates of the marginal value of carbon dioxide—the social cost of carbon (SCC)—were recently adopted by both the U.S. and U.K. Governments in order to satisfy requirements to value estimated greenhouse gas (GHG) changes of new federal regulations. However, the development and use of SCC estimates comes with significant challenges and controversial decisions. This paper summarizes the key issues and then derives guidance for developing, selecting, and applying the estimates that follows from the fundamental scientific nature and economic principles associated with GHGs and climate change, as well as an understanding of the state of the art for estimating the SCC. The paper evaluates recent estimates in light of the guidance and finds the estimates inconsistent with the guidance in a number of significant areas. The paper also differentiates SCC policy applications in terms of policies with incremental versus nonincremental implications for global GHGs, and identifies serious issues for application of the SCC in setting and evaluating climate policy targets.WIREs Clim Change2012, 3:163–195. doi: 10.1002/wcc.163This article is categorized under:Climate Economics > Aggregation Techniques for Impacts and Mitigation Costs
Double‐threshold cooperative detection for cognitive radio based on weighing
Authors: Liu Xin , Zhang Chengwen , Tan Xuezhi 
Published: March 2012

ABSTRACTIn cognitive radio (CR), the single‐threshold cooperative detection is sensitive to the noise power. In this paper, a double‐threshold cooperative detection scheme based on weighed combination is proposed to improve the global detected performance of the cooperative detection. The double thresholds that are decided by the restriction probability are adopted to divide the energy statistics observed by CRs into three subareas, and the detected performance of the CRs locating in the confusion area is fortified through the weighed data fusion by the coordinator. The CRs in the other two areas can make local binary decisions because of their exact sensing performance and then forward their 1‐bit decisions to the coordinator that will combine all the received decisions to give the final decision on the presence of the primary user. In this paper, both the periodic single‐band and wideband cooperative detections are investigated, and the probabilities of spectrum utilization by these two patterns are respectively analyzed. The simulation shows that the detection probability of the proposed scheme is better than that of the single‐threshold cooperative detection with decision fusion but slightly worse than that of the single‐threshold cooperative detection with data fusion. However, the average number of the bits sent to the coordinator by the proposed algorithm is less than that by the data fusion, and it may increase by the decreasing of the restriction probability. The simulation also shows that the periodic wideband sensing can obtain higher spectrum utilization than the periodic single‐band sensing. Copyright © 2012 John Wiley & Sons, Ltd.
Self‐control: limited resources and extensive benefits
Authors: Alquist Jessica , Baumeister Roy F. 
Published: March 2012

AbstractSuccessful self‐control has many benefits for individuals and society as a whole. Self‐regulation relies on a limited resource. After one act of self‐control, this resource is reduced, thereby impairing future acts of self‐control. Self‐control resources can be managed and conserved for future tasks. Recent research on perceived self‐control (in the self and others), self‐control in interpersonal interactions, and the physiological basis of the limited resource model point to promising areas for future self‐control research. WIREs Cogn Sci 2012, 3:419–423. doi: 10.1002/wcs.1173This article is categorized under:

Psychology > Emotion and Motivation
Utility of augmented reality system in hepatobiliary surgery
Authors: Okamoto Tomoyoshi , Onda Shinji , Matsumoto Michinori , Gocho Takeshi , Futagawa Yasuro , Fujioka Shuichi , Yanaga Katsuhiko , Suzuki Naoki , Hattori Asaki 
Published: March 2012

AbstractBackground/purposeThe aim of this study was to evaluate the utility of an image display system for augmented reality in hepatobiliary surgery under laparotomy.MethodsAn overlay display of organs, vessels, or tumor was obtained using a video see‐through system as a display system developed at our institute. Registration between visceral organs and the surface‐rendering image reconstructed by preoperative computed tomography (CT) was carried out with an optical location sensor. Using this system, we performed laparotomy for a patient with benign biliary stricture, a patient with gallbladder carcinoma, and a patient with hepatocellular carcinoma.ResultsThe operative procedures performed consisted of choledochojejunostomy, right hepatectomy, and microwave coagulation therapy. All the operations were carried out safely using images of the site of tumor, preserved organs, and resection aspect overlaid onto the operation field images observed on the monitors. The position of each organ in the overlaid image closely corresponded with that of the actual organ. Intraoperative information generated from this system provided us with useful navigation. However, several problems such as registration error and lack of depth knowledge were noted.ConclusionThe image display system appeared to be useful in performing hepatobiliary surgery under laparotomy. Further improvement of the system with individualized function for each operation will be essential, with feedback from clinical trials in the future.
Lasiodiplodan, an exocellular (1→6)-β-d-glucan from Lasiodiplodia theobromae MMPI: production on glucose, fermentation kinetics, rheology and anti-proliferative activity
Authors: Alves da Cunha Mário A , Turmina Janaína A , Ivanov Raphael C , Barroso Roney R , Marques Patrícia T , Fonseca Eveline A I , Fortes Zuleica B , Dekker Robert F H , Khaper Neelam , Barbosa Aneli M 
Published: March 2012

Abstract
Lasiodiplodan, an exopolysaccharide of the (1→6)-β-d-glucan type, is produced by Lasiodiplodia theobromae MMPI when grown under submerged culture on glucose. The objective of this study was to evaluate lasiodiplodan production by examining the effects of carbon (glucose, fructose, maltose, sucrose) and nitrogen sources (KNO3, (NH4)2SO4, urea, yeast extract, peptone), its production in shake flasks compared to a stirred-tank bioreactor, and to study the rheology of lasiodiplodan, and lasiodiplodan’s anti-proliferative effect on breast cancer MCF-7 cells. Although glucose (2.05 ± 0.05 g L−1), maltose (2.08 ± 0.04 g L−1) and yeast extract (2.46 ± 0.06 g L−1) produced the highest amounts of lasiodiplodan, urea as N source resulted in more lasiodiplodan per unit biomass than yeast extract (0.74 ± 0.006 vs. 0.22 ± 0.008 g g−1). A comparison of the fermentative parameters of L. theobromae MMPI in shake flasks and a stirred-tank bioreactor at 120 h on glucose as carbon source showed maximum lasiodiplodan production in agitated flasks (7.01 ± 0.07 g L−1) with a specific yield of 0.25 ± 0.57 g g−1 and a volumetric productivity of 0.06 ± 0.001 g L−1 h−1. A factorial 22 statistical design developed to evaluate the effect of glucose concentration (20–60 g L−1) and impeller speed (100–200 rpm) on lasiodiplodan production in the bioreactor showed the highest production (6.32 g L−1) at 72 h. Lasiodiplodan presented pseudoplastic behaviour, and the apparent viscosity increased at 60°C in the presence of CaCl2. Anti-proliferative activity of lasiodiplodan was demonstrated in MCF-7 cells, which was time- and dose-dependent with an IC50 of 100 μg lasiodiplodan mL−1.
Synthesis, Surface‐Active Properties, and Anthelmintic Activities of New Cationic Gemini Surfactants Against the Gastrointestinal Nematode, Heligmosomoides polygyrus bakeri, In Vitro
Authors: Sánchez Victoria G. , Giudici Claudio J. , Bassi Amilcar R. , Murguía Marcelo C. 
Published: March 2012

AbstractA novel series of cationic dimeric surfactants was prepared involving the ketalization reaction, Williamson etherification, and regioselective oxirane ring opening with tertiary alkyl amines. The synthesized compounds were obtained in high purity by a simple purification procedure using column chromatography. The critical micelle concentration (CMC), effectiveness of surface tension reduction (γCMC), surface excess concentration (Γ), and area per molecule at the interface (A) were determined and values indicate that the cationic series is characterized by good surface‐active and self‐aggregation properties. For the first time, we reported the anthelmintic activities against the rodent gastrointestinal nematode Heligmosomoides polygyrus bakeri, in vitro for cationic gemini compounds. In the series of five tested cationic compounds (4a–e), three of them (4a, 4b and 4d) were shown to have an excellent anthelmintic activity in vitro at different concentrations. The anthelmintic activity was found to be dependent on the type of cationic compound, concentration and incubation time. The cationic di‐C12 (4a) derivate of the series was the best anthelmintic agent, its use was optimal at a minimum concentration of 50 ppm and with 60 min of incubation.
Focus on Methodology: Salivary bioscience and research on adolescence: An integrated perspective
Authors: Granger Douglas A. , Fortunato Christine K. , Beltzer Emilie K. , Virag Marta , Bright Melissa A. , Out Dorothée 
Published: March 2012

ABSTRACTThe characterization of the salivary proteome and advances in biotechnology create an opportunity for developmental scientists to measure multi‐level components of biological systems in oral fluids and identify relationships with developmental processes and behavioral and social forces. The implications for developmental science are profound because from a single oral fluid specimen, information can be obtained about a broad array of biological systems and the genetic polymorphisms related to their function. The purpose of this review is to provide a conceptual and tactical roadmap for investigators interested in integrating these measurement tools into research on adolescent health and development.
A Review of Pneumatosis Intestinalis in the Setting of Systemic Cancer Treatments, Including Tyrosine Kinase Inhibitors
Authors: Vijayakanthan Niranjan , Dhamanaskar Kavita , Stewart Lori , Connolly Jodie , Leber Brian , Walker Irwin , Trus Michael 
Published: March 2012

Purpose Pneumatosis intestinalis is a radiologic diagnosis that manifests in a variety of clinical settings. We report 4 cases of pneumatosis intestinalis in patients undergoing cancer treatments that included cytotoxic agents and/or tyrosine kinase inhibitors. These reports aim to provide insight into the clinical interpretation and pathogenesis of pneumatosis intestinalis in the setting of cancer treatments and demonstrate a potential association with tyrosine kinase inhibitors. Methods Radiologists responsible for the interpretation of adult imaging at our tertiary care centre were surveyed to identify cases of pneumatosis intestinalis arising in the midst of cancer treatment. The case histories were reviewed by physicians with expertise in cancer treatment. Results Four cases of chemotherapy-related pneumatosis intestinalis were identified. The diagnosis was made in 1 patient during investigations undertaken for non–life-threatening abdominal symptoms and incidentally in 2 patients by abdominal imaging used to measure chemotherapy response. A fourth patient presented in a life-threatening manner, and abdominal imaging was symptom guided. Interestingly, 3 of the 4 patients were receiving treatments that included a tyrosine kinase inhibitor, and this agent was the only identifiable potential etiology in 1 patient. Conclusions The significance of pneumatosis intestinalis arising during cancer treatments is difficult to interpret because of the complex nature of the diseases and the treatments that often include combinations of cytotoxic agents and/or novel therapies. These reports demonstrate the importance of classifying this radiologic finding according clinical severity rather than etiology and underscore the need for continued observation for unexplained adverse effects when using novel therapies.
Transient waves generated by a moving bottom obstacle: a new near-field solution
Authors: Madsen Per A. , Hansen Asger Bendix 
Published: March 2012

AbstractWe consider the classical problem of a single-layer homogeneous fluid at rest and a low, slowly varying, long and positive bottom obstacle, which is abruptly started from rest to move with a constant speed $V$. As a result a system of transient waves will develop, and we assume that locally in the region over the obstacle dispersion can be ignored while nonlinearity cannot. The relevant governing equations for the near-field solution are therefore the nonlinear shallow water (NSW) equations. These are bidirectional and can be formulated in terms of a two-family system of characteristics. We analytically integrate and eliminate the backward-going family and achieve a versatile unidirectional single-family formulation, which covers subcritical, transcritical and supercritical conditions with relatively high accuracy. The formulation accounts for the temporal and spatial evolution of the bound waves in the vicinity of the obstacle as well as the development of the transient free waves generated at the onset of the motion. At some distance from the obstacle, dispersion starts to play a role and undular bores develop, but up to this point the new formulation agrees very well with numerical simulations based on a high-order Boussinesq formulation. Finally, we derive analytical asymptotic solutions to the new equations, providing estimates of the asymptotic surface levels in the vicinity of the obstacle as well as the crest levels of the leading non-dispersive free waves. These estimates can be used to predict the height and speed of the leading waves in the undular bores. The numerical and analytical solutions to the new single-family formulation of the NSW equations are compared to results based on the forced Korteweg–de Vries/Hopf equation and to numerical Boussinesq simulations.
Non-singular boundary integral methods for fluid mechanics applications
Authors: Klaseboer Evert , Sun Qiang , Chan Derek Y. C. 
Published: March 2012

AbstractA formulation of the boundary integral method for solving partial differential equations has been developed whereby the usual weakly singular integral and the Cauchy principal value integral can be removed analytically. The broad applicability of the approach is illustrated with a number of problems of practical interest to fluid and continuum mechanics including the solution of the Laplace equation for potential flow, the Helmholtz equation as well as the equations for Stokes flow and linear elasticity.
BEAUTIFUL SOULS MIXED UP WITH HOOKED NOSES: ART, DEGENERATION, AND ANTI-SEMITISM INTHE MASTERANDTRILBY
Authors: Mendelssohn Michèle 
Published: March 2012

The diagnosis made by Dr P. C. Remondino, M.D. was unambiguous. “Trilbyis a masterpiece when viewed in the light of a study in heredity,” he announced in the pages ofPractical Medicinein 1895. “Du Maurier has given us . . . the well digested results of a careful as well as discriminating study. . . . Neither Darwin, [nor] Galton, . . . could have given us a more comprehensive or more lucid study of the subject. Neither could Maudsley” (380–81). Despite the good doctor's critical insight,Trilby's deployment of degenerationist discourse has often gone unnoticed. On the rare occasions it has been touched upon, it has most often been subsumed under the banner offin-de-siècleanti-Semitism or connected to Du Maurier's anti-Aestheticism. Yet what this essay reveals is that art, degeneration, and anti-Semitism were, in fact, intimately connected in the late nineteenth century, and that this not only influenced literature, it also shaped its reception. This essay examinesTrilby(1894) in conjunction withThe Master(1894), a novel by the most important British Zionist of the late nineteenth century, Israel Zangwill. Since Zangwill's death in 1926, literary critics have paid him scant attention. His contributions to degenerationism have been wholly overlooked even though his notion of the “melting pot” was almost certainly the theory of ethnicity with the most traction in late nineteenth- and early twentieth-century America.
ON THE CLIFF EDGE OF ENGLAND: TOURISM AND IMPERIAL GOTHIC IN CORNWALL
Authors: Trower Shelley 
Published: March 2012

The final chapters of Bram Stoker's novel The Jewel of Seven Stars (1903) are set in a house on the “very verge” of a cliff in Cornwall, the peninsula located at the far south west of England. The narrator, Malcolm Ross, travels overnight from London to Cornwall, then describes his first sight of the house, and a little later the position of the dining-room, its walls hanging over the sea:
We were all impressed by the house as it appeared in the bright moonlight. A great grey stone mansion of the Jacobean period; vast and spacious, standing high over the sea on the very verge of a high cliff. When we had swept round the curve of the avenue cut through the rock, and come out on the high plateau on which the house stood, the crash and murmur of waves breaking against rock far below us came with an invigorating breath of moist sea air . . .We had supper in the great dining-room on the south side, the walls of which actually hung over the sea. The murmur came up muffled, but it never ceased. As the little promontory stood well out into the sea, the northern side of the house was open; and the due north was in no way shut out by the great mass of rock, which, reared high above us, shut out the rest of the world. Far off across the bay we could see the trembling lights of the castle, and here and there along the shore the faint light of a fisher's window. For the rest the sea was a dark blue plain with here and there a flicker of light as the gleam of starlight fell on the slope of a swelling wave. (195–96; ch. 17)
In this liminal place, there is a confusion of categories: the sea not only crosses the boundary into land (the sound of its “murmur” and its moistness in the air) but seems itself to become land (a “dark blue plain”). The actual land is in contrast invisible from the house, being shut out by a mass of rock that rears high above. From the far distant shore, on the other side of the bay, the lights vibrate across both land and sea, further collapsing the sense of a distinction between them: from the “trembling lights” of the castle to the intermittent “flicker of light” on the waves.