bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of a Highly Nanodispersed Pd–MgO/SiO2 Composite Catalyst with Multifunctional Activity for CH4 Reforming
Authors: Kim Hyun You , Park Jung‐Nam , Henkelman Graeme , Kim Ji Man 
Published: June 2012

AbstractWe describe a highly nanodispersed Pd–MgO/SiO2 composite catalyst synthesized by an in situ, one‐pot, reverse microemulsion method as a multifunctional catalyst for low‐temperature CH4 reforming. Experimental results suggested evidence for a synergistic interplay of each component and DFT calculations confirmed a multifunctional reaction mechanism of CH4 reforming and the importance of the Pd–MgO interface. We find that the Pd nanoparticle binds and dissociates CH4, that MgO activates CO2 and increases coking resistance, and that SiO2 prevents Pd sintering. CO spillover from Pd to MgO opens a faster pathway for CO production. A unique and groundbreaking feature of the present catalyst is the well‐designed cooperation of each element that assures long‐lasting, consistent, high‐ and low‐temperature activity.
Variable length signal detection framework for cognitive radio systems
Authors: Choi Kae Won , Jeon Wha Sook , Jeong Dong Geun 
Published: June 2012

SUMMARYThe cognitive radio (CR) system opportunistically utilizes the frequency bands temporally unoccupied by the primary user. In the CR system, the energy or cyclostationary detector is used to detect the primary user signal. For protecting the primary user tightly, the signal detection time can be very long, which leads to inefficiency in the CR system. Thus, we propose a novel signal detector that greatly reduces the average detection time. The proposed detector periodically decides whether it terminates the detection process or receives more input signal for more information. Therefore, the proposed detector has variable detection time. We will call the proposed detector the variable length signal detector (VLSD). The VLSD is designed by using a partially observable Markov decision process framework for optimal performance. We present the numerical results showing that the VLSD requires much smaller average detection time compared with the traditional fixed length signal detector to achieve a given detection error probability. Copyright © 2012 John Wiley & Sons, Ltd.
Analysis of EEG phase properties with pulse and noise stimuli in visual cortex (V1)
Authors: Ogawa Yutaro , Takeno Shohei , Kotani Kiyoshi , Jimbo Yasuhiko 
Published: June 2012

AbstractThe event‐related potential (ERP) of brain EEG (electroencephalogram) activity plays an important role in EEG phase synchronization and/or hemodynamic responses measured by fMRI (functional magnetic resonance imaging). However, the specific mechanism of ERP generation is still unclear. In this study, pulse and noise‐type visual stimuli were administered to subjects. Then the phase response of the EEG in α‐waves was analyzed. The magnitudes of the phase response were found to vary with the stimulus administered phase and no power increase was observed. These results indicate that the ERP in α‐waves is generated by phase resetting of brain activity. © 2012 Wiley Periodicals, Inc. Electron Comm Jpn, 95(7): 58–64, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.11368
Feature analysis of groundwater discharge points in coastal regions around Mt. Chokaisan using ALOS AVNIR‐2 Data
Authors: Kageyama Yoichi , Shibata Chieko , Nishida Makoto 
Published: June 2012

AbstractThe flow of fresh water into the sea, called submarine groundwater discharge, is a key factor for understanding the hydrologic cycle in both sea and land regions. The numerous positions from which fresh water is discharged and the variations in its quantity impede the understanding of its properties. In a previous study, we detected groundwater discharge points expressed by differences in fresh water and seawater by using multispectral Landsat Enhanced Thematic Mapper Plus (ETM+) signals with 30‐m spatial resolution. Details of seawater surface information regarding the submarine groundwater discharge have not yet been obtained. Therefore, this paper analyzes the features of water properties around groundwater discharge points by using Advanced Land Observing Satellite (ALOS) Advanced Visible and Near Infrared Radiometer type 2 (AVNIR‐2) outputs, which provide 10‐m spatial resolution. Classification maps obtained by k‐means clustering are compared with measurements in ground surveys, geologic maps, and estimation maps of relative salinity. The experimental results obtained from the AVNIR‐2 data are in considerable agreement with the realities in the study area. © 2012 Wiley Periodicals, Inc. Electron Comm Jpn, 95(7): 1–9, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.11398
Remote Control of the C‐3–C‐4 Double‐Bond Epoxidation of a Chiral 1,2‐Dihydroquinoline: Application to the Synthesis of (–)‐(R)‐Sumanirole (PNU‐95666E)
Authors: Jean‐Gérard Ludivine , Macé Frédéric , Ngo Anh Ngoc , Pauvert Mickaël , Dentel Hélène , Evain Michel , Collet Sylvain , Guingant André 
Published: June 2012

AbstractA twelve‐step synthesis of (–)‐(R)‐sumanirole starting from quinoline is described. The first synthetic approach, using a chiral Reissert adduct, was too problematic to be pursued further. In the second successful approach, the authors took advantage of the stereoselective epoxidation of a 1,2‐dihydroquinoline bearing an Evans' chiral auxiliary at N‐1.
A Bifunctional β‐Isocupreidine Derivative as Catalyst for the Enantioselective Morita–Baylis–Hillman Reaction and a Mechanistic Rationale for Enantioselectivity
Authors: Martelli Gianluca , Orena Mario , Rinaldi Samuele 
Published: June 2012

AbstractStarting from β‐isocupreidine (β‐ICD), a series of difunctional catalysts were synthesized to ascertain their usefulness in the asymmetric Morita–Baylis–Hillman (MBH) reaction. The trichloroacetylcarbamate derivative was found to give the (R)‐MBH adducts in excellent optical purities (90–99 % ee) and moderate to good yields (43–83 %), in some cases, better than β‐ICD. A number of acrylates were also tested and 2,6‐dimethyl‐4‐nitrophenyl acrylate was identified as a suitable alternative to the popular hexafluoroisopropyl acrylate, with both the β‐ICD and trichloroacetylcarbamate derivatives. The mechanism of the rate‐ and selectivity‐determining step was ascertained by means of experimental observations and a computational investigation aimed at clarifying the transition state structures is reported. These studies have clarified the reasons for the effectiveness of these structurally related catalysts in the asymmetric MBH reaction between acrylates and aldehydes.
Modified water‐filling algorithm for deliberately clipped OFDM signals
Authors: Golan Ziv , Wulich Dov 
Published: June 2012

ABSTRACTThe most well‐known drawback of multi‐carrier (MC) communication systems such as orthogonal frequency division multiplexing is the high dynamic range of its transmitted signal. However, it still has many advantages. One important advantage is the high spectral efficiency in a frequency selective channel environment. This spectral efficiency entitled MC system as ‘capacity achieving’ and indeed, nowadays, MC systems are able to get very close to the Shannon capacity bound. A very important element of the ‘capacity achieving’ is the water‐filling (WF) power‐loading method. This paper presents an innovative concept of combining the WF method with the ‘clipping and filtering’ peak to average power ratio reduction technique into a unified approach. The proposed system optimizes the channel capacity by controlling both the clipping amount together with the sub‐carrier power‐loading coefficients. This method will be shown to give greater performance than the traditional WF that does not use the clipping model. In addition, a computationally efficient algorithm that is suitable for real‐time implementation is proposed here. Copyright © 2012 John Wiley & Sons, Ltd.
The impact of self‐rated health on medical care utilization for older people with depressive symptoms
Authors: Pu Christy , Bai Ya‐Mei , Chou Yiing‐Jenq 
Published: June 2012

ObjectivesTo test the hypothesis whether self‐rated health alone can explain the relationship between depression and medical care utilization for the older people and to determine whether the explanatory power of self‐rated health is greater than that of the explanatory power of a major disease and activities of daily living.MethodsThis study used the data from 1572 older people obtained from the 2005 National Health Interview Survey in Taiwan. The data from the National Health Interview Survey were linked to the 2005 computerized claims data from the National Health Insurance, and from that, the outpatient expenditures and number of outpatient episodes were identified. The contribution of self‐rated health, activities of daily living, the presence of major diseases, and self‐rated health were estimated using ordinary least squares regressions.ResultsControlling for self‐rated health alone almost eliminates the positive relationship between depressive symptoms and number of outpatient visits. After controlling for self‐rated health, the utilization ratio of outpatient visits for older people with depressive symptoms reduced significantly to only 1.01 and became insignificant. A similar pattern was observed for total outpatient costs.ConclusionsIt was found that self‐rated health is an important factor in the depressive symptoms–outpatient utilization relationship. To reduce medical costs for older people with depressive symptoms, it is essential that the self‐rated health for this group is improved. Future studies should test the mechanism through which self‐rated health impacts on medical utilization for older people with depressive symptoms. Copyright © 2012 John Wiley & Sons, Ltd.
Total Synthesis, Absolute Configuration, and Biological Activity of Xyloallenoide A
Authors: Wang San‐Yong , Xu Zhong‐Liang , Wang Hui , Li Chun‐Rong , Fu Li‐Wu , Pang Ji‐Yan , Li Jing , She Zhi‐Gang , Lin Yong‐Cheng 
Published: June 2012

AbstractThe novel natural product xyloallenoide A, isolated from the marine mangrove endophytic fungus from the South China Sea, and its diastereoisomer xyloallenoide A1, which contain N‐methyl‐substituted amino acids, were synthesized. The absolute configurations of the amino acid units of xyloallenoide A were finally confirmed to be L‐Lys, Me‐D‐Val, and Me‐L‐Ala. This report represents a practical and attractive alternative for the synthesis of N‐methyl‐substituted cyclotripeptides. In the preliminary bioassay, synthetic xyloallenoide A showed marginal activities against KB (IC50=9.6 μM) and KBv200 cells (IC50=10.3 μM), and xyloallenoide A1 was inactive against KB and KBv200 cells.
Interfacially Cross‐Linked Reverse Micelles as Soluble Support for Palladium Nanoparticle Catalysts
Authors: Lee Li‐Chen , Zhao Yan 
Published: June 2012

AbstractReverse micelles (RM) were formed in heptane/CHCl3 with a surfactant carrying the triallylammonium (=triprop‐2‐en‐1‐ylammonium) head group (Scheme). Photo‐cross‐linking with dithiothreitol (=rel‐(2R,3R)‐1,4‐dimercaptobutane‐2,3‐diol; DTT) captured the RMs and afforded organic, soluble nanoparticles in a one‐step reaction. Similar to dendrimers, the cross‐linked reverse micelles could encapsulate palladium nanoparticles within their hydrophilic cores and protect them in catalytic reactions. Good to excellent yields were obtained in the Heck coupling of a range of alkyl acrylates (=alkyl prop‐2‐enoates) and iodobenzenes (Tables 1 and 2). The catalytic activity of the palladium nanoparticles was maintained in several repeated runs.
Two New Cycloheptapeptides from Psammosilene tunicoides
Authors: Tian Jun‐Mian , Gao Jin‐Ming , Lu Lu , He Yi‐Ren , Shen Yun‐Heng , Li Hui‐Liang , Su Juan , Liu Run‐Hui , Shan Lei , Zhang Wei‐Dong 
Published: June 2012

AbstractTwo new cycloheptapeptides, tunicyclins F and G, were isolated from the roots of Psammosilene tunicoides. Their chemical structures were elucidated by extensive analysis of 1D‐ and 2D‐NMR, as well as HR‐ESI‐MS data. Tunicyclin G contains an unusual α,β‐dehydrotryptophan (ΔZ‐Trp) residue, which mainly occurs in the cyclic peptides from marine sponge and bacteria.
Cyclohexadepsipeptides from the Filamentous Fungus Acremonium sp. BCC 2629
Authors: Bunyapaiboonsri Taridaporn , Vongvilai Pornrapee , Auncharoen Patchanee , Isaka Masahiko 
Published: June 2012

AbstractSeven new cyclohexadepsipeptides, beauvenniatins F, G1, G2, G3, H1, H2, and H3 (1–7, resp.), were isolated from cultures of the fungus Acremonium sp. BCC 2629. Their structures were elucidated by extensive spectroscopic analyses. The absolute configurations were addressed by HPLC analyses of their acid hydrolysates. Their biological activities were evaluated against Mycobacterium tuberculosis H37Ra and Plasmodium falciparum K1; the respective MIC and IC50 values were in the micromolar range.
A New Alkylation Method for Heptalene‐4,5‐dicarboxylates and of One of Their Pseudoester Forms
Authors: Abou‐Hadeed Khaled , Molnar Zoltàn A. , Göksaltık Pinar , Kunz Roland W. , Linden Anthony , Hansen Hans‐Jürgen 
Published: June 2012

AbstractDimethyl heptalene‐4,5‐dicarboxylatesThe locants of heptalene itself are maintained throughout the whole work. See footnote 4 in [1] for reasoning.
undergo preferentially a Michael addition reaction at C(3) with α‐lithiated alkyl phenyl sulfones at temperatures below −50°, leading to corresponding cis‐configured 3,4‐dihydroheptalene‐4,5‐dicarboxylates (cf. Table 1, Schemes 3 and 4). The corresponding heptalenofuran‐1‐one‐type pseudoesters of dimethyl heptalene‐4,5‐dicarboxylates (Scheme 5) react with [(phenylsulfonyl)methyl]lithium almost exclusively at C(1) of the furanone group (Scheme 6). In contrast to this expected behavior, the uptake of 1‐[phenylsulfonyl)ethyl]lithium occurs at C(5) of the heptalenofuran‐1‐ones as long as they carry a Me group at C(11) (Schemes 6 and 7). The 1,4‐ as well as the 1,6‐addition products eliminate, on treatment with MeONa/MeOH in THF, benzenesulfinate, thus leading to 3‐ and 4‐alkylated dimethyl heptalene‐4,5‐dicarboxylates, respectively (Schemes 8–13). The configuration of the addition reaction of the nucleophiles to the inherently chiral heptalenes is discussed in detail (cf. Schemes 14–19) on the basis of a number of X‐ray crystal‐structure determinations as well as by studies of the temperature‐dependence of the 1H‐NMR spectra of the addition products.
Reflective family play: A model for whole family intervention in the infant and preschool clinical population
Authors: Philipp Diane A. 
Published: June 2012

AbstractThis article proposes a new treatment model, Reflective Family Play, for clinical intervention in two‐parent families of children aged 0 to 5 years. It is play‐based and grounded in the evidence‐based treatment approach of Watch Wait and Wonder (WWW) as well as the assessment tool known as the Lausanne Family Play paradigm (LFP). WWW is a dyadic treatment for caregivers and their infants or preschoolers that has been shown to shift attachment in the very young (N.J. Cohen, E. Muir, & M. Lojkasek, 1999; N.J. Cohen, M. Lojkasek, E. Muir, R. Muir & C.J. Parker, 2002). The LFP is a more recent adaptation of the Lausanne Trilogue Play paradigm (LTP; E. Fivaz‐Depeursinge & A. Corboz‐Warnery, 1999). Together, the LTP/LFP have now been used for over 2 decades as reliable measures of the family alliance and interactions in two‐parent households. By combining concepts from WWW and the LTP/LFP, a novel approach is presented for treatment in two‐caregiver households. Clinical excerpts are used to illustrate.
Lab‐on‐a‐chip biophotonics: its application to assisted reproductive technologies
Authors: Lai David , Smith Gary D. , Takayama Shuichi 
Published: June 2012

AbstractWith the benefits of automation, sensitivity and precision, microfluidics has enabled complex and otherwise tedious experiments. Lately, lab‐on‐a‐chip (LOC) has proven to be a useful tool for enhancing non‐invasive assisted reproductive technology (ART). Non‐invasive gamete and embryo assessment has largely been through periodic morpohological assessment using optical microscopy and early LOC ART was the same. As we realize that morphological assessment is a poor indication of gamete or embryo health, more advanced biophotonics has emerged in LOC ART to assay for metabolites or gamete separation via optoelectrical tweezers. Off‐chip, even more advanced biophotonics with broad spectrum analysis of metabolites and secretomes has been developed that show even higher accuracy to predicting reproductive potential. The integration of broad spectrum metabolite analysis into LOC ART is an exciting future that merges automation and sensitivity with the already highly accurate and strong predictive power of biophotonics. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Sorption enhanced steam reforming (SESR): a direct route towards efficient hydrogen production from biomass‐derived compounds
Authors: Fermoso Javier , He Li , Chen De 
Published: June 2012

AbstractOVERVIEW: Efficient conversion of biomass to hydrogen is imperative in order to realize sustainable hydrogen production. Sorption enhanced steam reforming (SESR) is an emerging technology to produce high purity hydrogen directly from biomass‐derived oxygenates, by integrating steam reforming, water‐gas shift and CO2 separation in one‐stage. Factors such as simplicity of the hydrogen production process, flexibility in feedstock, high hydrogen yield and low cost, make the SESR process attractive for biomass conversion to fuels.IMPACT: Recent work has demonstrated that SESR of biomass‐derived oxygenates has greater potential than conventional steam reforming for hydrogen production. The flexibility of SESR processes resides in the diversity of feedstocks, which can be gases (e.g. biogas, syngas from biomass gasification), liquids (e.g. bioethanol, glycerol, sugars or liquid wastes from biomass processing) and solids (e.g. lignocellulosic biomass). SESR can be developed to realize a simple biomass conversion process but with high energy efficiency.APPLICATIONS: Hydrogen production by SESR of biomass‐derived compounds can be integrated into existing oil refineries and bio‐refineries for hydrotreating processing, making the production of gasoline and diesel greener. Moreover, hydrogen from SESR can be directly fed to fuel cells for power generation. Copyright © 2012 Society of Chemical Industry
A Note on Even Cycles and Quasirandom Tournaments
Authors: Kalyanasundaram Subrahmanyam , Shapira Asaf 
Published: June 2012

AbstractA cycle in a tournament T is said to be even, if when walking along C, an even number of edges point in the wrong direction, that is, they are directed from to . In this short article, we show that for every fixed even integer , if close to half of the k‐cycles in a tournament T are even, then T must be quasirandom.This resolves an open question raised in 1991 by Chung and Graham 1991.
Effects of viscosity‐pressure dependency on the non‐Newtonian squeeze film of parallel circular plates
Authors: Lin Jaw‐Ren , Chu Li‐Ming , Liang Long‐Jin 
Published: June 2012

ABSTRACTOn the basis of the Barus experimental research, the viscosity of an incompressible lubricant grows exponentially with its pressure. Therefore, the squeeze film issues between parallel circular plates lubricated with a non‐Newtonian couple‐stress fluid are reexamined in the present study by considering the effects of viscosity‐pressure dependency. According to the results, the influences of viscosity‐pressure dependency raise the load capacity and lengthen the approaching time of the plates. Numerical results under different values of the viscosity parameter and the non‐Newtonian parameter are also provided in tables for engineering applications. Copyright © 2012 John Wiley & Sons, Ltd.
The second regularized trace of differential operator equation with the semi‐periodic boundary conditions
Authors: Bayramov Azad , C̣aliṣkan Seda Kızılbudak , Akgün Fatma A. 
Published: June 2012

AbstractIn this paper, we have obtained the second regularized trace formula for the differential operator equation with the semi‐periodic boundary conditions. Copyright © 2012 John Wiley & Sons, Ltd.
Linagliptin: new DPP‐4 inhibitor for type 2 diabetes mellitus
Authors: Htike Zin , Lawrence Ian 
Published: June 2012

AbstractLinagliptin is a new DPP‐4 inhibitor licensed for use as monotherapy or in combination in type 2 diabetes. Our New products review presents the clinical data relating to its efficacy and adverse events and considers its place in treatment, particularly in patients with renal impairment
Realization of population inversion under nonadiabatic conditions induced by the coupling between vibrational modes via Raman fields
Authors: Patel Vishesha , Malinovskaya Svetlana A. 
Published: June 2012

AbstractWe study the effects of coupling between molecular vibrational modes attendant the excitation of Raman transitions. Raman active vibrational modes are described by two two‐level systems (TLSs) with nondegenerate ground states. The population inversion is investigated under the condition of zero relative phase between initially populated states. We use two ultrafast laser pulses for the pump and the Stokes fields that have chirps the same in the magnitude and opposite in the sign. Within this model, the coupling induces nonadiabatic effects leading to a diverse population distribution. By introducing the time delay between the Stokes and the pump pulse, we realized a complete population transfer in both coupled TLSs. We demonstrated the population inversion in a more generic case of the averaged initial relative phase. © 2012 Wiley Periodicals, Inc.
Monodisperse, Submicrometer Droplets via Condensation of Microfluidic‐Generated Gas Bubbles
Authors: Seo Minseok , Matsuura Naomi 
Published: June 2012

AbstractMicrofluidics (MFs) can produce monodisperse droplets with precise size control. However, the synthesis of monodisperse droplets much smaller than the minimum feature size of the microfluidic device (MFD) remains challenging, thus limiting the production of submicrometer droplets. To overcome the minimum micrometer‐scale droplet sizes that can be generated using typical MFDs, the droplet material is heated above its boiling point (bp), and then MFs is used to produce monodisperse micrometer‐scale bubbles (MBs) that are easily formed in the size regime where standard MFDs have excellent size control. After MBs are formed, they are cooled, condensing into dramatically smaller droplets that are beyond the size limit achievable using the original MFD, with a size decrease corresponding to the density difference between the gas and liquid phases of the droplet material. Herein, it is shown experimentally that monodisperse, submicrometer droplets of predictable sizes can be condensed from a monodisperse population of MBs as generated by MFs. Using perfluoropentane (PFP) as a representative solvent due to its low bp (29.2 °C), it is demonstrated that monodisperse PFP MBs can be produced at MFD temperatures >3.6 °C above the bp of PFP over a wide range of sizes (i.e., diameters from 2 to 200 μm). Independent of initial size, the generated MBs shrink rapidly in size from about 3 to 0 °C above the bp of PFP, corresponding to a phase change from gas to liquid, after which they shrink more slowly to form fully condensed droplets with diameters 5.0 ± 0.1 times smaller than the initial size of the MBs, even in the submicrometer size regime. This new method is versatile and flexible, and may be applied to any type of low‐bp solvent for the manufacture of different submicrometer droplets for which precisely controlled dimensions are required.