bluuebunny/crossref_metadata_2025_split huggingface dataset:
A New VNS Metaheuristic Using MADS as a Local Optimizer
Authors: Zegal Walid , Essaddam Naceur , Brimberg Jack 
Published: June 2012

ABSTRACTWe propose a new hybrid metaheuristic VNSMADS that is an implementation of the Variable Neighbourhood Search (VNS) algorithm with the Mesh Adaptive Direct Search (MADS) as the local search. Because MADS is a Derivative‐Free Optimization method, the targeted problems may be non‐smooth on black box functions possessing several local optima. Constraints other than bounds on the variables are not considered. VNSMADS is applied on a real‐world problem from Finance: the portfolio selection problem using the investor preferences. Numerical results show the efficiency of our approach. Copyright © 2012 John Wiley & Sons, Ltd.
Epoxy‐amine based thermoresponsive networks designed by Diels–Alder reactions
Authors: Marref Mohamed , Mignard Nathalie , Jegat Corinne , Taha Mohamed , Belbachir Mohamed , Meghabar Rachid 
Published: June 2012

AbstractThe synthesis of Diels–Alder (DA) adducts from stoichiometric quantities of a new multi‐maleimide dienophile and epoxy‐amine type oligomers bearing furan group units on their side chains was investigated. Precursors of the DA reaction were first synthesized and their functionalities were determined by 1H NMR and gel permeation chromatography/SEC analysis. TGA and DSC were used to characterize their thermal properties. In this study, the effect of the multi‐furan diene functionality on the network density was analyzed. Rheological analysis was used to highlight the thermal reversibility of the DA reaction and to calculate the average molar weight between crosslinks. The results showed that network density could be regulated or modulated by varying the functionality of the diene. Copyright © 2012 Society of Chemical Industry
Effect of crystallization on microstructure and mechanical properties of poly[(ethylene oxide)‐block‐(amide‐12)]‐toughened poly(lactic acid) blend
Authors: Han Lijing , Han Changyu , Dong Lisong 
Published: June 2012

AbstractThe effect of crystallization on the microstructure and mechanical properties of a poly[(ethylene oxide)‐block‐(amide‐12)] (PEBA)‐toughened poly(lactic acid) (PLA) blend was investigated. Annealing was used to govern the crystallization microstructure and hence the mechanical properties of the blend. Crystallization resulted in the morphology of the PLA component altering from a continuous amorphous phase to continuous crystalline phase. Moreover, as the crystallization of PLA proceeded, the degree of crystallinity, spherulite size and lamellar thickness increased, and the interlamellar and interspherulitic connections became weaker. These led to the large plastic deformation in the matrix during tension being suppressed, and cracks appeared easily under tensile load, which was favorable to fracture for the blend during tension and so a small elongation at break was obtained. However, the elongation at break for all the annealed specimens was higher than that for neat amorphous PLA, suggesting that PEBA still showed a toughening effect for PLA under annealing. © 2012 Society of Chemical Industry
Robotic‐assisted laparoscopic primary repair of acute iatrogenic colonic perforation: case report
Authors: Pedraza Rodrigo , Ragupathi Madhu , Martinez Tara , Haas Eric M. 
Published: June 2012

AbstractBackgroundColonic perforation during colonoscopy is a rare complication and is usually considered a surgical emergency. Traditionally, such perforations have required laparotomy with repair or resection. Minimally invasive approaches have recently been successfully implemented. We describe our initial experience with a robotic‐assisted laparoscopic technique for primary colorrhaphy following colonoscopic perforation.MethodsAn 84 year‐old female presented with an acute sigmoid perforation identified during colonoscopy. Laparoscopic exploration revealed a full‐thickness tear into the sigmoid mesentery, which was primarily repaired using robotic‐assisted technique.ResultsThe procedure was successfully completed in 135 min with an estimated blood loss of 25 ml. There were no intraoperative complications or need for open conversion. The patient was discharged after 4 days without further hospitalization or secondary surgical intervention.ConclusionIn the presented case, robotic primary colorrhaphy was demonstrated to be a safe and feasible alternative for the management of acute colonoscopic perforation and may warrant consideration in the emergency setting. Copyright © 2012 John Wiley & Sons, Ltd.
Physical layer DVB‐SH performance prediction based on mutual information
Authors: Chauvet W. , Lacan J. , Amiot‐Bazile C. , Lacoste F. , Ros B. 
Published: June 2012

SUMMARYDigital Video Broadcasting‐Satellite Handled (DVB‐SH) is a hybrid satellite terrestrial broadcasting standard dedicated to provide video or audio services for handheld terminals. On the satellite part, this standard can make use of interleaving mechanisms to mitigate the effects of the Land Mobile Satellite channel. As a result, these mechanisms enable the in‐time distribution of a codeword over a duration ranging from 100 ms to about 30 s, depending on their parameters. This mechanism significantly improves the error recovery performance of the code; however in the literature, a theoretical evaluation at system level of this improvement is missing. Moreover, carrying out Monte‐Carlo simulations implementing real decoding processes on significant traveled distances is time prohibitive.We propose hereafter a prediction method compatible with fast simulations to quantitatively evaluate the system performance in terms of Rate, Erroneous Second Ratio, and zapping time. This method is based on the computation of the mutual information between emitted and received symbols for QPSK modulation and turbo coding.We demonstrate that our method reaches a prediction precision of the order of 0.1 dB, which is significantly better than two classical prediction methods. Moreover, our solution reduces the simulation time by a factor of 500 compared with Monte‐Carlo. Beyond DVB‐SH application, the presented approach can be applied in a large panel of satellite mobile systems and is completely new for the satellite community. Copyright © 2012 John Wiley & Sons, Ltd.
Designing role‐based access control using formal concept analysis
Authors: Kumar Ch. Aswani 
Published: June 2012

ABSTRACTRole‐based access control (RBAC) is one of the most popular and widely deployed access control model. The objective of this paper is to design an RBAC using formal concept analysis, which is based on mathematical lattice and order theory. For this purpose, we derive a dyadic formal context from the triadic security context that represents role‐based access permission and perform attribute exploration from formal concept analysis. We demonstrate the proposed method on a health care ad hoc network. The analysis indicates that the proposed method follows the RBAC constraints: static separation of duties and role hierarchy. Copyright © 2012 John Wiley & Sons, Ltd.
Certificateless broadcast authentication for vehicular ad hoc networks
Authors: Ryu Eun‐Kyung , Yoo Kee‐Young 
Published: June 2012

ABSTRACTThe technology of vehicular ad hoc networks allows vehicles communicate with road‐side infrastructure or with nearby vehicles, supporting a wide range of promising vehicular communication applications and services. It relies on the periodic transmission of packets, called beaconing, as single‐hop link‐layer broadcast to nearby vehicles or road‐side units. However, because of the inherent broadcast nature of the wireless channels, beacon messages are easily exposed to security attacks, such as spoofing, manipulation, or replaying. In this paper, we propose a new certificateless broadcast authentication scheme for securing beacon messages in vehicular networks, which uses the mechanism of Schnorr signature as an underlying primitive. The main goal of our scheme is not to impose the requirement of the public key infrastructure (PKI) that makes existing schemes impractical. Our scheme has a number of crucial advantages. It mitigates the PKI requirement but without degrading any security strength. Consequently, it surpasses existing PKI‐based solutions in terms of both the communication and computation overhead associated with certificates. We also show how the scheme can be extended to provide a practical solution for the problem of key distribution in general‐purpose vehicular applications. Copyright © 2012 John Wiley & Sons, Ltd.
Social change to avert further climate change: defining the scale of change and principles to guide a new strategy
Authors: Byrne John , Kurdgelashvili Lado , Taminiau Job 
Published: June 2012

AbstractThe inability of the international community so far to materially affect the trend in anthropogenic emissions demonstrates the urgent need to formulate an effective response to the threat of climate change. We offer a detailed picture—disaggregated by country—of the social changes necessary to reduce the rate and risk of climate change. We recognize two broad types of social change—changes that either reduce energy intensity or reduce carbon intensity. Through the Kaya identity, we demonstrate that the current business as usual scenario expects a carbon concentration of approximately 660 ppm by 2100, which corresponds to a potentially catastrophic 4.9°C temperature increase. Through a low‐carbon‐emissions scenario built on principles used by the Center for Energy and Environmental Policy over the past 20 years, we show the social changes required to realize a hopefully sustainable 450 ppm carbon dioxide concentration with an equitable 3.3 ton/capita annual carbon emissions budget. We conclude that all members of the international community—even Non‐Annex 1 members—face major and immediate challenges in any common effort to address climate change. Our analysis supports exploratory efforts for the formulation of menus of social change. As a preliminary basis for identifying such menus of social change, we suggest priority be given to bottom‐up discourses that position the principles of sustainability, equity, development autonomy, and justice at the core of decision‐making.This article is categorized under:Energy and Climate > Economics and Policy
The way forward in climate change mitigation
Authors: Pachauri R. K. 
Published: June 2012

AbstractThe year 2012 would mark 20 years since the birth of the United Nations Framework Convention on Climate Change (UNFCCC). As stated under Article 2 of this Convention, the ultimate objective of the UNFCCC is to prevent dangerous anthropogenic interference with the climate system. In support of this objective, the Convention required parties to ‘take precautionary measures to anticipate, prevent or minimize the causes of climate change and mitigate its adverse effects’.This article is categorized under:

Energy and Climate > Economics and Policy
Energy and Climate > Climate and Environment
A Novel Organosulfonate Cadmium(II) Complex with Graphite‐like 2D Layer Linked by Hydrogen Bonds
Authors: Li Ming‐Tian , Wang Cheng‐Gang , Yang Rui‐Song , Cui Xue‐Jun 
Published: June 2012

AbstractA novel mixed‐ligand complex, [Cd(im)6][Cd(im)3(H2O)3]2(ans)6·8H2O (1), was obtained from the reaction ofCd(OAc)2·2H2O, imidazole (im) and sodium 4‐aminonaphthalene‐1‐sulfonate tetrahydrate (Na‐ans) in a mixed solvent at 25 °C. The complex was characterized by elemental analysis, IR spectroscopy, and X‐ray single crystal diffraction. There are two kinds of cations constructed by CdII atoms with a octahedral coordination arrangement in 1. The CdII atom is bonded by six nitrogen atoms from six im ligands in the first cation, and the second central CdII atom is bonded by three nitrogen atoms of im molecules and three oxygen atoms belonging to water molecules. The ans anion acts as a counterion to balance the charge, and the adjacent anions are reversed but non‐parallel interlinked by N–H···O(S) hydrogen bonds into graphite‐like 2D sheet viewed from the c axis. The anionic channels along the [110] direction are filled with the cations, and the two kinds of cations are alternatingly arranged in the channels. The hydrogen‐bonding interactions together with the ionic bonds stabilize the crystal structure. The thermostability of the complex was investigated by TG and DSC.
Fast‐Track for the Modern Colorectal Department
Authors: Sehgal Rishabh , Hill Arnold , Deasy Joseph , McNamara Deborah A. , Cahill Ronan A. 
Published: June 2012

AbstractIn recent years, fast‐track or enhanced recovery after surgery (ERAS) colorectal pathways have been utilized to achieve faster recovery and discharge from hospital with swift resumption of normal activities of daily living without an increase in complications or readmissions. Despite the large body of evidence available, however, adoption of the fast‐track methodology in current surgical practice has been slow and sporadic. As outlined by a recent Cochrane review, practice uptake has mostly focused on individual component uptake. Therefore, instead of repeating what already has been established in the literature pertaining to colorectal fast‐track surgery, the aim of this article is to interrogate the evidence concerning the individual components of ERAS pathways as they relate to a contemporary surgical department to determine the most relevant critical components for patients undergoing colorectal surgery in modern surgical practice.
Rayleigh wave signature in ionograms induced by strong earthquakes
Authors: Maruyama Takashi , Tsugawa Takuya , Kato Hisao , Ishii Mamoru , Nishioka Michi 
Published: June 2012

After the magnitude 9.0 earthquake off the Pacific coast of Tohoku (near the east coast of Honshu, Japan), which occurred on 11 March 2011, an unusual multiple‐cusp signature (MCS) was observed in ionograms at three ionosonde stations across Japan. To investigate the general characteristics of MCSs, we examined ionograms obtained during the period 1957 to 2011 from five ionosonde stations in Japan after earthquakes with a seismic magnitude of 8.0 or greater. A total of 43 such earthquakes occurred after 1957, as recorded in the database of the United States Geological Survey. MCSs were observed in 8 of 43 earthquakes, allowing us to investigate the specific conditions of MCS appearance. The appearance of MCSs at different epicentral distances exhibits traveling characteristics at a velocity of ∼4.0 km/s, which is in the range of Rayleigh waves. There is a ∼7 min offset in delay time after the earthquake at each epicentral distance in the travel‐time diagram. This offset is consistent with the propagation time of acoustic waves from the ground to the ionosphere launched by Rayleigh waves. MCSs in ionograms provide a snapshot of vertical disturbances induced by a wave because the sweep time for the whole ionospheric echo traces is much shorter than the propagation time of acoustic waves. The vertical scale of the disturbances is 10∼30 km, which corresponds to an acoustic wave period of 20∼50 s at ionospheric heights.
Up-Regulation of a Magnesium Transporter GeneOsMGT1Is Required for Conferring Aluminum Tolerance in Rice
Authors: Chen Zhi Chang , Yamaji Naoki , Motoyama Ritsuko , Nagamura Yoshiaki , Ma Jian Feng 
Published: June 2012

AbstractMagnesium (Mg)-mediated alleviation of aluminum (Al) toxicity has been observed in a number of plant species, but the mechanisms underlying the alleviation are still poorly understood. When a putative rice (Oryza sativa) Mg transporter gene, Oryza sativa MAGNESIUM TRANSPORTER1 (OsMGT1), was knocked out, the tolerance to Al, but not to cadmium and lanthanum, was decreased. However, this inhibition could be rescued by addition of 10 μm Mg, but not by the same concentration of barium or strontium. OsMGT1 was expressed in both the roots and shoots in the absence of Al, but the expression only in the roots was rapidly up-regulated by Al. Furthermore, the expression did not respond to low pH and other metals including cadmium and lanthanum, and was regulated by an Al-responsive transcription factor, AL RESISTANCE TRANSCRIPTION FACTOR1. An investigation of subcellular localization showed that OsMGT1 was localized to the plasma membrane. A short-term (30 min) uptake experiment with stable isotope 25 Mg showed that knockout of OsMGT1 resulted in decreased Mg uptake, but that the uptake in the wild type was enhanced by Al. Mg concentration in the cell sap of the root tips was also increased in the wild-type rice, but not in the knockout lines in the presence of Al. A microarray analysis showed that transcripts of genes related to stress were more up- and down-regulated in the knockout lines. Taken together, our results indicate that OsMGT1 is a transporter for Mg uptake in the roots and that up-regulation of this gene is required for conferring Al tolerance in rice by increasing Mg concentration in the cell.
Similar functional outcomes after partial nephrectomy for clinical T1b and T1a renal cell carcinoma
Authors: Iizuka Junpei , Kondo Tsunenori , Hashimoto Yasunobu , Kobayashi Hirohito , Ikezawa Eri , Takagi Toshio , Omae Kenji , Tanabe Kazunari 
Published: June 2012

Objectives:  To examine the medium‐term functional outcomes of partial nephrectomy for clinical T1b renal cell carcinoma, and to compare them with those of radical nephrectomy for clinical T1b and with those of partial nephrectomy for clinical T1a tumors.Methods:  The participants of this study were patients operated for clinical T1a and clinical T1b tumors operated at Tokyo Women's Medical University, Tokyo, Japan, between January 1979 and June 2011. A total of 67 patients underwent partial nephrectomy for clinical T1b tumor, 195 patients underwent radical nephrectomy for clinical T1b tumors and 324 underwent partial nephrectomy for clinical T1a tumors. The outcomes of these three groups were compared.Results:  Partial nephrectomy provided better preservation of residual renal function compared with radical nephrectomy for clinical T1b, and the postoperative estimated glomerular filtration rate was similar in the patients who underwent partial nephrectomy for clinical T1b and those who underwent partial nephrectomy for clinical T1a. Postoperative renal function was steadily maintained after partial nephrectomy during the medium‐term follow up. The probability of freedom from new onset of chronic kidney disease after partial nephrectomy for clinical T1b tumors was significantly higher from that after radical nephrectomy for clinical T1b tumors, and similar to that after partial nephrectomy for clinical T1a tumors.Conclusions:  The higher anatomical complexity of clinical T1b tumors is unlikely to provide a significant influence on postoperative renal function after partial nephrectomy, when compared with the clinical T1a tumors. These findings support the beneficial role of partial nephrectomy in the preservation of renal function of clinical T1b renal cell carcinoma patients undergoing surgery.
A population‐based audit of the clinical use of faecal occult blood testing in primary care for colorectal cancer
Authors: Gillberg A. , Ericsson E. , Granstrom F. , Olsson L. I. 
Published: June 2012

AbstractAim  Symptoms related to colorectal cancer (CRC) are common. We investigated the value of the faecal occult blood test (FOBT), when administered in primary care, in the diagnosis of CRC.Method  All patients who underwent a FOBT (Hemoccult II) at 20 public primary care centres in Sörmland County, Sweden, during 2000–2005, were included (n = 9048). Linkage to the Swedish Cancer Registry identified all cases of CRC. Symptoms recorded at the time of the FOBT were retrieved from the patient records. The outcome from the FOBT to diagnosis and subsequent survival was compared between patients who were FOBT negative and patients who were FOBT positive.Results  One‐hundred and sixty‐one patients were diagnosed with CRC within 2 years after undergoing a FOBT in primary care. These comprised 18% of all 917 patients diagnosed with CRC in the county during the study period. In 41 (25.4%) of the 161 patients the test was negative. Symptoms related to CRC were documented for 158 (98%) patients at the time the FOBT was administered. The median investigation time from the FOBT test to the diagnosis of CRC was 91 days: 80 days for FOBT‐positive patients and 188 days for FOBT‐negative patients (P < 0.001). This difference was signficant independent of age, sex and site of tumour. The hazard ratio for FOBT negativity, 3 years after the FOBT, when adjusted for age and sex, was 1.47 (95% CI, 0.81–2.68).Conclusion  Despite having suggestive symptoms, 41 (4.5%) of 917 CRC patients had a negative FOBT result in primary care. This was associated with diagnostic delay and, potentially, a worse outcome.
Woollard, John (2011) Psychology for the classroom: E‐learningRoutledge (New York & London) isbn978‐0‐415‐59093‐8 135 pp £19.99http://www.routledge.com/books/details/9780415590938/
Authors: Hoffmann Melissa , Brescia William 
Published: June 2012

SummaryWith its thorough review of the uses of relevant techniques in education, this provides useful information for educators. It covers research, theory, pedagogy, and strategies for using e‐learning.If the content of this book is likely to be relevant to you, we recommend you borrow a copy for a while.Melissa Hoffmann & William Brescia
deFreitas, Sara & Maharg, Paul ed (2011) Digital games and learningContinuum (London) isbn 978‐1‐4411‐9870‐9 282 pp £22.99http://www.continuumbooks.com/books/detail.aspx?BookId=157255&SubjectId=940
Authors: Thomas Michael 
Published: June 2012

SummaryThis edited collection focuses on research on digital games and learning, and incorporates a range of perspectives, from those of games designers to teachers, academics and policymakers in the field of IT for learning. If the content of this book is likely to be relevant to you, I recommend you borrow a copy.Michael Thomas
Fluoxetine potentiation of methylphenidate‐induced neuropeptide expression in the striatum occurs selectively in direct pathway (striatonigral) neurons
Authors: Van Waes Vincent , Carr Betsy , Beverley Joel A. , Steiner Heinz 
Published: June 2012

J. Neurochem. (2012) 122, 1054–1064.AbstractConcomitant therapies combining psychostimulants such as methylphenidate and selective serotonin reuptake inhibitors (SSRIs) are used to treat several mental disorders, including attention‐deficit hyperactivity disorder/depression comorbidity. The neurobiological consequences of these drug combinations are poorly understood. Methylphenidate alone induces gene regulation that mimics partly effects of cocaine, consistent with some addiction liability. We previously showed that the SSRI fluoxetine potentiates methylphenidate‐induced gene regulation in the striatum. The present study investigated which striatal output pathways are affected by the methylphenidate + fluoxetine combination, by assessing effects on pathway‐specific neuropeptide markers. Results demonstrate that fluoxetine (5 mg/kg) potentiates methylphenidate (5 mg/kg)‐induced expression of substance P and dynorphin, markers for direct pathway neurons. In contrast, no drug effects on the indirect pathway marker enkephalin were found. Because methylphenidate alone has minimal effects on dynorphin, the potentiation of dynorphin induction represents a more cocaine‐like effect for the drug combination. On the other hand, the lack of an effect on enkephalin suggests a greater selectivity for the direct pathway compared with psychostimulants such as cocaine. Overall, the fluoxetine potentiation of gene regulation by methylphenidate occurs preferentially in sensorimotor striatal circuits, similar to other addictive psychostimulants. These results suggest that SSRIs may enhance the addiction liability of methylphenidate.