bluuebunny/crossref_metadata_2025_split huggingface dataset:
MaxDiv: an optimal randomized spectrum access with maximum diversity scheme for cognitive radio networks
Authors: Xiao Xun , Liu Shucheng , Lu Kejie , Wang Jianping 
Published: July 2011

SUMMARYCognitive radio network (CRN) is an emerging technology that can increase the utilization of spectrum underutilized by primary users (PUs). In the literature, most exiting investigations on CRNs have focused on how secondary users (SUs) can coexist harmlessly with the PUs. Despite the importance of such a coexistence issue, it is also crucial to investigate the coexistence of SUs because (i) the PUs usually rarely use the licensed spectrum and (ii) the advantages of CRN will significantly increase the number of SUs in the future. To address this challenging issue, we propose, in this paper, an optimal randomized spectrum access scheme, whose main ideas include the following: (i) an SU shares its sensing results with neighboring SUs and (ii) with the regional sensing results, an SU will access available channels with a non‐uniform probability distribution. We first formulate a multichannel optimal randomized multiple access (MC‐ORMA) problem that aims to maximize the throughput of the CRN; we then develop efficient distributed algorithms to solve the MC‐ORMA problem; we derive the closed‐form value of collision probability for each SU; and finally, we conduct extensive numerical experiments and compare our theoretical analysis with simulation results to demonstrate the advantages of our scheme. Copyright © 2011 John Wiley & Sons, Ltd.
Psychometric evaluation of the eating disorder examination and eating disorder examination‐questionnaire: A systematic review of the literature
Authors: Berg Kelly C. , Peterson Carol B. , Frazier Patricia , Crow Scott J. 
Published: July 2011

AbstractObjective:The purpose of this study was to systematically review the reliability of scores on the Eating Disorder Examination (EDE) and the Eating Disorder Examination‐Questionnaire (EDE‐Q) and to examine the validity of their use as measures of eating disorder symptoms.Method:Articles describing the psychometric properties of the EDE and EDE‐Q were identified in a systematic search of major computer databases and a review of reference lists. Articles were selected based on a priori inclusion and exclusion criteria.Results:Fifteen studies were identified that examined the psychometrics of the EDE, whereas 10 studies were found that examined the psychometrics of the EDE‐Q.Discussion:Both instruments demonstrated reliability of scores. There is evidence that scores on the EDE and EDE‐Q correlate with scores on measures of similar constructs and support for using the instruments to distinguish between cases and non‐cases. Additional research is needed to broaden the generalizability of the findings. © 2011 by Wiley Periodicals, Inc. (Int J Eat Disord 2012;)
Predicting nonsuicidal self‐injury episodes over a discrete period of time in a sample of women diagnosed with bulimia nervosa: An analysis of self‐reported trait and ecological momentary assessment based affective lability and previous suicide attempts
Authors: Anestis Michael D. , Silva Caroline , Lavender Jason M , Crosby Ross D. , Wonderlich Stephen A. , Engel Scott G. , Joiner Thomas E. 
Published: July 2011

AbstractObjective:To examine the moderating effect of trait affective lability on the relationship between past suicidal behavior and future nonsuicidal self‐injury (NSSI).Method:A total of 127 adult females diagnosed with bulimia nervosa took part in this study. We hypothesized that individuals with greater levels of self‐reported trait affective lability and a greater number of past suicide attempts would engage in a greater number of NSSI episodes over the course of 2 weeks than would individuals lacking elevations in one or both of those variables, controlling for average level of negative affect and affective lability as measured through ecological momentary assessment (EMA).Results:The two‐way interaction of trait affective lability and past suicidal behavior predicted participants' number of NSSI episodes during the course of the study.Discussion:Interaction of self‐reported trait affective lability and past suicidal behavior may exhibit clinical utility in the prediction of patients' imminent risk of engaging in NSSI. © 2011 by Wiley Periodicals, Inc. (Int J Eat Disord 2012; 45:808–811)
The effect of pregnancy on the uterine NK cell KIR repertoire
Authors: Male Victoria , Sharkey Andrew , Masters Leanne , Kennedy Philippa R. , Farrell Lydia E. , Moffett Ashley 
Published: July 2011

AbstractThe major leukocyte population in the decidua during the first trimester of pregnancy consists of NK cells that express receptors capable of recognizing MHC class I molecules expressed by placental trophoblast. These include members of the killer immunoglobulin‐like receptor (KIR) family, the two‐domain KIR (KIR2D), which recognize HLA‐C. Interactions between decidual NK (dNK) cell KIR2D and placental HLA‐C contribute to the success of pregnancy and dNK cells express KIR2D at higher frequency than peripheral NK (pNK) cells. Thus, they are biased toward recognizing HLA‐C. In order to investigate when this unusual KIR repertoire appears, we compared the phenotype of NK cells isolated from non‐pregnant (endometrium) and pregnant (decidua) human uterine mucosa. Endometrial NK (eNK) cells did not express KIR2D at a higher level than matched pNK cells, so the bias toward HLA‐C recognition occurs as a response to pregnancy. Furthermore, HLA‐C expression was upregulated on uterine stromal cells as the mucosa transformed from endometrium to decidua at the onset of pregnancy. As uterine NK (uNK) cells can mature from NK precursors and acquire KIR expression in utero, the pregnancy‐specific bias of uNK cells toward HLA‐C recognition could arise as developing uNK cells interact with uterine stromal cells, which express higher levels of HLA‐C during pregnancy.
Dicarbonylrhodium(I) Complexes of Bipyridine Ligands with Proximate H‐Bonding Substituents and Their Application in Methyl Acetate Carbonylation
Authors: Conifer Christopher M. , Law David J. , Sunley Glenn J. , Haynes Anthony , Wells John R. , White Andrew J. P. , Britovsek George J. P. 
Published: July 2011

AbstractA series of cationic cis‐dicarbonylrhodium(I) complexes [Rh(L)(CO)2]SbF6 has been prepared containing 2,2′‐bipyridine ligands with proximate H‐bonding substituents R in the 6‐ and 6′‐position (R = OH, NH2, COOEt and PO(OEt)2). The solid‐state structures have been determined by X‐ray crystallography for the complexes where R = OH, NH2 and COOEt. The molecular structures have revealed metal–metal and π–π interactions between the square‐planar complexes resulting in the formation of molecular chains in the solid state. IR studies on the reaction of [Rh(bipy)(CO)2]SbF6 with MeI have shown the formation of a neutral complex [RhI(CO)(bipy)], which undergoes oxidative addition of MeI much faster than the cationic complex [Rh(bipy)(CO)2]+. Although all complexes show good activities for the carbonylation of methyl acetate, this is believed to be due to their instability and the formation of [RhI2(CO)2]– under the reaction conditions.
Solution‐Stable Triple Helicates of Quaterimidazole: Three‐Dimensional Crystal Structures and Optical Resolution by Chiral‐Column HPLC
Authors: Yakiyama Yumi , Murata Tsuyoshi , Ise Tomoaki , Shiomi Daisuke , Sato Kazunobu , Takui Takeji , Nakasuji Kazuhiro , Morita Yasushi 
Published: July 2011

AbstractComplex formation of quaterimidazole with FeII, CoII, and NiII yielded dinuclear triple helicates in the solution state by the self‐assembling ability of the ligand based on the strong chelating coordination bonds. Crystallization of the CoII complex from aqueous solution afforded the CoIII complex with a triple‐helical structure. X‐ray crystal structure analyses revealed that the helicates are linked through N–H···X hydrogen bonds with counteranions and solvent molecules to form three‐dimensional networks. The spectrophotometric titration experiment showed that quaterimidazole forms triple helicates with various d‐block transition metal ions with high selectivity. The outward intermolecular interactions and high stability of the helicates from the rigid molecular structures combined with the intramolecular π–π interactions of imidazole moieties and their strong chelating coordination enabled the successful optical resolution of right‐ and left‐handed helicates by chiral‐column HPLC.
Application of short path distillation for recovery of polyphenols from deodorizer distillate
Authors: Meyer F. , Eggers R. , Oehlke K. , Harbaum‐Piayda B. , Schwarz K. , Siddiqi M.A. 
Published: July 2011

AbstractDuring physical refining of oil derived from ‘high temperature short time’ (HTST) pretreated rapeseeds, polyphenols are separated from the oil during deodorization and accumulate together with other high‐value minor compounds in the so‐called deodorizer distillate. For recovery of these compounds single‐stage and multistage short path distillations were carried out in a laboratory scale apparatus at evaporation temperatures between 110 and 170°C and pressures between 0.006 and 0.01 mbar. In addition, the removal of traces of pesticides from rapeseed deodorizer distillate was investigated. It was observed that these compounds can be separated from deodorizer distillate by means of short path distillation very effectively. On the basis of these experiments, a recovery process for polyphenols was proposed involving short path distillation, acid catalyzed esterification with methanol, solvent crystallization and solvent extraction processes. The final product was a polyphenol enriched extract containing about 14% of polyphenols. A polyphenol recovery of 50% is considered to be reachable and fractions rich in tocopherols and sterols may be obtained as by‐products.
The First Benzo[1,2:4,5]dicyclobutenones and Their Tricarbonylchromium Complexes
Authors: Abdelhamid Ismail Abdelshafy , Habib Osama Mahmoud Ali , Butenschön Holger 
Published: July 2011

AbstractTreatment of 1,4‐dibromo‐2,5‐dimethoxybenzene (6) with NaNH2 followed by 1,1‐dimethoxyethene (7) afforded the bi‐ and tricyclic acetals such as 8 and 9 as the products of [2+2] cycloadditions of the intermediate arynes. After chromatographic separation and acetal hydrolysis the title compounds 15 and 16 were obtained in high yields as the first representatives of their class. Complexation of the acetals with Cr(CO)6 gave the corresponding tricarbonylchromium complexes in excellent yields. Subsequent deacetalization afforded the diketone complexes 18 and rac‐20, which underwent stereoselective nucleophilic diadditions at –78 °C.
Immobilization of Xanthine Oxidase on Carbon Nanotubes Through Double Supramolecular Junctions for Biosensor Construction
Authors: Villalonga Reynaldo , Diez Paula , Gamella María , Reviejo Julio , Pingarrón José M. 
Published: July 2011

AbstractA novel approach for the noncovalent functionalization of single‐walled carbon nanotubes with enzymes, using a β‐cyclodextrin‐modified pyrene derivative, mono‐6‐ethylenediamino‐(2‐pyrene carboxamido)‐6‐deoxy‐β‐cyclodextrin (Pyr‐βCD), as a molecular bridge for the construction of a supramolecular assembly between the nanotube surface and an adamantane‐modified enzyme, is reported. The Pyr‐βCD derivative was synthesized and its stacking to SWNT through π–π interactions accomplished. The functionalized nanotubes showed low capacity for the nonspecific adsorption of proteins, but were able to immobilize adamantane‐modified xanthine oxidase via host‐guest associations. This double supramolecular junctions‐based approach was employed to modify a glassy carbon electrode with the enzyme/nanotubes complex for designing a biosensor device toward xanthine. The biosensor showed fast electroanalytical response (10 s), high sensitivity (5.9 mA/M cm2) low detection limit (2 µM) and high stability.
A Prototype of Electrochemical Sensor for Measurements of Carbonyl Compounds in Air
Authors: Gębicki Jacek 
Published: July 2011

AbstractThe paper presents the results of investigation on a prototype sensor for measurements of benzaldehyde and formaldehyde in air. Sensitivity, limit of quantification and coefficient of selectivity of the sensor have been determined as a function of membrane thickness and electrode type using square wave voltammetry (SWV) technique. The working and counter electrodes were made of platinum and gold. Ionic liquids 1‐hexyl, 3‐methylimidazolium bis(trifluoromethanesulfonyl)imide constituted an internal electrolyte. Polydimethylsiloxane (PDMS) membrane separated gaseous medium from the electrolyte.
Investigation of phosphoprotein signatures of archived prostate cancer tissue specimens via proteomic analysis
Authors: Chen Li , Fang Bin , Giorgianni Francesco , Gingrich Jeffrey R. , Beranova‐Giorgianni Sarka 
Published: July 2011

AbstractEarly detection of prostate cancer and determination of its aggressiveness are critical factors that influence treatment outcomes. To aid in the clinical decision making, novel biomarkers are being sought. Direct, global‐scale examination of primary human specimens provides the most relevant picture of the tumor machinery and its perturbations, and this information is highly significant in the context of biomarker discovery. In the pilot study reported here, we focused on mapping of the phosphoproteome in human prostate cancer specimens obtained from a tissue repository. A gel‐free proteomic strategy included whole proteome digestion, phosphopeptide enrichment with immobilized metal ion affinity chromatography (IMAC), and phosphoprotein identification via LC‐MS/MS and database searches. We applied this strategy to obtain phosphoprotein signatures from a set of five specimens. Phosphoproteins were characterized from each specimen. The phosphoprotein panels included 16–23 phosphoproteins that encompassed 18–30 phosphorylation sites. Some of proteins/sites were characterized in multiple specimens, whereas the majority of sites were found in single specimens. The characterized panels include caldesmone, desmin, HSP β‐1, synaptopodin‐2, filamin‐C, tensin‐1, and others. In summary, the study showed that cancer‐relevant phosphoproteins can be characterized directly from archived prostate tumor specimens, establishing the groundwork for further biomarker discovery.
Prediction of turbulence energy dissipation in flexible apron of barrages using numerical method
Authors: Mishra Kapileswar 
Published: July 2011

SUMMARYBarrages form an important component of hydraulic structures constructed to intercept and divert part of the available flow of a river and use it for purposes like irrigation, hydropower and domestic or industrial water supply. A flexible apron is a protection system provided in the barrage to prevent the possibility of the scour hole traveling close to the stilling basin. The turbulence kinetic energy is predicted using a 3D VOF (volume of fluid) realizable k −ϵ model for both horizontal and depressed flexible aprons placed downstream of the stilling basin of the barrage. The turbulence kinetic energy at the downstream end of the inclined flexible apron is comparably less compared with the horizontal flexible apron for all the cases. Copyright © 2011 John Wiley & Sons, Ltd.
Remarks on the numerical solution of the adjoint quasi‐one‐dimensional Euler equations
Authors: Lozano C. , Ponsin J. 
Published: July 2011

SUMMARYWe examine the numerical solution of the adjoint quasi‐one‐dimensional Euler equations with a central‐difference finite volume scheme with Jameson‐Schmidt‐Turkel (JST) dissipation, for both the continuous and discrete approaches. First, the complete formulations and discretization of the quasi‐one‐dimensional Euler equations and the continuous adjoint equation and its counterpart, the discrete adjoint equation, are reviewed. The differences between the continuous and discrete boundary conditions are also explored. Second, numerical testing is carried out on a symmetric converging–diverging duct under subsonic flow conditions. This analysis reveals that the discrete adjoint scheme, while being manifestly less accurate than the continuous approach, gives nevertheless more accurate flow sensitivities. Copyright © 2011 John Wiley & Sons, Ltd.
A Comparison of US Police Interviewers' Notes with their Subsequent Reports
Authors: Gregory Amy Hyman , Compo Nadja Schreiber , Vertefeuille LeeAnn , Zambruski Gavin 
Published: July 2011

ABSTRACTInvestigators often take notes during witness interviews, which may be used when reconstructing interviews and writing reports. Little research has evaluated the content of interviewers' notes and how (accurately) they are transferred to reports. Thirteen US police investigators' notes from a witness interview were evaluated and compared with their subsequent reports. Results indicate that although information contained in notes is accurate (98%), a high percentage of interview information (68%) is omitted. Notes focus mainly on witness responses while neglecting interviewer questions/utterances. Although 94% of information contained in notes is accurately transferred to reports, interviewers fail to account for 40% of crime‐relevant information in their reports. On average, reports contained a larger percentage of witness information than the notes, but police officers failed to account for how information was originally elicited via their questions/utterances. Subsequent interview reports also contained a higher percentage of peripheral crime details than notes, contributing to a decreased omission rate (28%) from notes to reports. Taken together, results indicate that interviewer notes and reports provide a fairly accurate picture of witness responses. However, they present a skewed picture of the entire interview content by omitting a high percentage of interview content and their own questions/utterances. Copyright © 2011 John Wiley & Sons, Ltd.
Raman spectroscopy and CARS microscopy of stem cells and their derivatives
Authors: Downes Andrew , Mouras Rabah , Bagnaninchi Pierre , Elfick Alistair 
Published: July 2011

AbstractThe characterisation of stem cells is of vital importance to regenerative medicine. Failure to separate out all stem cells from differentiated cells before therapies can result in teratomas—tumours of multiple cell types. Typically, characterisation is performed in a destructive manner with fluorescent assays. A truly non‐invasive method of characterisation would be a major breakthrough in stem cell‐based therapies. Raman spectroscopy has revealed that DNA and RNA levels drop when a stem cell differentiates into other cell types, which we link to a change in the relative sizes of the nucleus and cytoplasm. We also used Raman spectroscopy to investigate the biochemistry within an early embryo, or blastocyst, which differs greatly from colonies of embryonic stem cells. Certain cell types that differentiate from stem cells can be identified by directly imaging the biochemistry with CARS microscopy; examples presented are hydroxyapatite—a precursor to bone, and lipids in adipocytes. Copyright © 2011 John Wiley & Sons, Ltd.
Bent polyynes: ring geometry studied by Raman and IR spectroscopy
Authors: Lucotti Andrea , Tommasini Matteo , Chalifoux Wesley A. , Fazzi Daniele , Zerbi Giuseppe , Tykwinski Rik R. 
Published: July 2011

AbstractInfrared (IR) and Raman spectroscopy have been used to examine the vibrational characteristics of a series of three macrocyclic tetraynes in comparison with an acyclic analog. By changing the length of the alkyl tether of the macrocycles, varying degrees of bending of the tetrayne moiety can be achieved, and the joint use of IR and Raman spectroscopies provides an avenue to probe the impact of bending on the sp‐chain. The spectroscopic data show a general trend toward decreasing activation of Raman bands in the IR spectra, and vice versa, as bending of the polyyne chain is decreased. Density functional theory calculations provide a detailed rationalization of the experimental observations. Copyright © 2011 John Wiley & Sons, Ltd.
Tumor size and presence of calcifications on ultrasonography are pre‐operative predictors of lymph node metastases in patients with papillary thyroid cancer
Authors: Gomez Nephtali R. , Kouniavsky Guennadi , Tsai Hua‐Ling , Somervell Helina , Pai Sara I. , Tufano Ralph P. , Umbricht Christopher , Kowalski Jeanne , Dackiw Alan P.B. , Zeiger Martha A. 
Published: July 2011

AbstractBackground and ObjectivesLymph node metastases in papillary thyroid cancer (PTC) are common and their presence can significantly alter the treatment for patients with PTC. We therefore sought to identify pre‐operative predictors of lymph node metastases in patients with PTC.MethodsA thyroid tumor database was queried to identify patients with a pre‐operative diagnosis of PTC and underwent thyroidectomy between January 2006 and August 2009. One hundred and three patients who had a pre‐operative ultrasound and had lymph nodes surgically resected were identified. Clinical factors and tumor ultrasound characteristics were recorded. The pre‐operative ultrasound results, type of operation, and final pathology results were also recorded.ResultsOf the 103 patients, 74 (72%) were women and 29 (28%) were men with an age range of 15–78 years (median age of 43). Of the ultrasound characteristics evaluated only calcifications (P = 0.007) and size (P = 0.003) were statistically associated with positive cervical lymph nodes. None of the other demographic or clinical factors were significantly associated with lymph node metastases.ConclusionsThyroid nodule size and presence of calcifications on ultrasound were found to have a statistically significant association with lymph node metastases in patients with PTC. This information could be used to guide the surgical management of these patients. J. Surg. Oncol. 2011; 104:613–616. © 2011 Wiley Periodicals, Inc.
Elevated expression of Rad51 is correlated with decreased survival in resectable esophageal squamous cell carcinoma
Authors: Li Yong , Yu Hui , Luo Rong‐Zhen , Zhang Ying , Zhang Mei‐Fang , Wang Xin , Jia Wei‐Hua 
Published: July 2011

AbstractBackgroundRad51 plays a critical role in homologous recombination and correlates with many human malignancies. However, its role and clinical significance in esophageal squamous cell carcinoma (ESCC) has not been clarified. The purpose of this study was to explore the clinicopathological correlation and prognostic significance of Rad51expression in a group of ESCC patients.MethodsWe evaluated Rad51 expression in 230 surgically resected ESCC specimens by immunochemistry using tissue microarray and correlated with clinicopathological features including post‐operation survival.ResultsThere was no significant correlation between Rad51 expression and clinicopathological characteristics in terms of age, sex, tumor location, histologic grade, T, N categories, and TNM stage. The Kaplan–Meier survival analysis showed that high expression of Rad51 indicated a poorer disease free survival (DFS) of ESCC patients compared with the patients with low expression of Rad51 (P = 0.031), similar result also shown in overall survival (OS) analysis (P = 0.034). Furthermore, Rad51 expression could stratify node positive patients in DFS (P = 0.021) and OS (P = 0.035). Multivariate analysis confirmed the Rad51 expression was an independent prognostic factor for DFS (HR = 1.603, P = 0.013) and OS (HR = 1.555, P = 0.021) of ESCC patients.ConclusionsElevated expression of Rad51 is associated with poor prognosis for resectable ESCC patients. J. Surg. Oncol. 2011; 104:617–622. © 2011 Wiley Periodicals, Inc.