On triple Veronese embeddings of \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}<tex> $\mathbb {P}^n$</tex>\end{document}<img src='/wiley-blackwell_img/equation/tex2gif-ueqn-1.gif' alt='equation image'> in the Grassmannians

WILEY‐VCH Verlag 2011 Mathematische Nachrichten Vol.284 No.11

<P><B>Abstract</B></P><P>We classify all the embeddings of \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}<TEX>$\mathbb {P}_n$</TEX>\end{document}<IMG src='/wiley-blackwell_img/equation/tex2gif-ueqn-2.gif' alt ='equation image'/> in a Grassmannian <I>Gr</I>(1, <I>N</I>) such that the composition with the Plücker embedding is given by a linear system of cubics on \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}<TEX>$\mathbb {P}_n$</TEX>\end{document}<IMG src='/wiley-blackwell_img/equation/tex2gif-ueqn-3.gif' alt ='equation image'/>. As a direct corollary, we prove that every vector bundle giving such an embedding, splits if <I>n</I> ⩾ 3. © 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim</P>

Analog predistortion linearization of Doherty power amplifiers using bandwidth reduction of error signal

Lee, Yong-Sub,Lee, Mun-Woo,Kam, Sang-Ho,Jeong, Yoon-Ha Wiley Subscription Services, Inc., A Wiley Company 2010 MICROWAVE AND OPTICAL TECHNOLOGY LETTERS Vol.52 No.6

<P>This article represents analog predistortion linearization of Doherty power amplifier (DPA) using bandwidth reduction of error signal. To verify our methods, two DPAs are implemented using a push-pull GaN HEMT and a push-pull Si LDMOS at 2.14 GHz and tested using the memory-compensated analog predistorter with transistor-based error generators and three-branch nonlinear paths. From the measured four-carrier WCDMA results, the proposed analog predistortion DPAs show the significant linearity improvement. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1313–1316, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25190</P>

A broadband linearization method using a novel opto-electrical predistorter for radio-over-fiber systems

Moon, Yon-Tae,Choi, Woon-Kyung,Choi, Young-Wan Wiley Subscription Services, Inc., A Wiley Company 2010 MICROWAVE AND OPTICAL TECHNOLOGY LETTERS Vol.52 No.7

<P>A broadband linearization method with a novel opto-electrical predistorter was experimentally demonstrated. With the proposed method, the third-order intermodulation distortion was simultaneously enhanced by more than 10 dB for 510 MHz ranges and by 24 dB at 2.2 GHz without any change in electrical circuitry. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1638–1640, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25240</P>

A new K-band push-push VCO using a miniaturized hairpin resonator

Lee, Hyun-Wook,Yoon, Ki-Cheol,Nam, Hee,Eo, Yun-Seong,Lee, Jong-Chul Wiley Subscription Services, Inc., A Wiley Company 2010 MICROWAVE AND OPTICAL TECHNOLOGY LETTERS Vol.52 No.3

<P>In this article, a K-band push-push Voltage Controlled Oscillator (VCO) is presented using a miniaturized hairpin resonator (MHR) with a higher loaded quality factor and the reduced circuit area within 50% compared to the conventional one at 9.2 GHz.The MHR combined with the GaAs MESFET varactor shows a tuning range of 140 MHz, and this voltage tunable MHR is used to compose a push-push VCO. It provides the frequency tuning range of 71 MHz with flatness of +0.13 dB, which is increased by 31 MHz compared to the conventional VCO. The voltage controlled push-push oscillator based on the series feedback topology is implemented on 0.54 mm-thick Teflon substrate with a dielectric constant of 2.54. The measurement shows the output power of 1.18 dBm, the fundamental signal power suppression of −33 dBc, and phase noise performance of −86.78 dBc/Hz at 100 kHz offset. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 699–701, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25007</P>

Preparation of Mesoporous Silica and Carbon Materials with Multilength-Scale Pores and Hydrogen Sorption Application

Kwon, Tae-Hwan,Jung, Suhyun,Kim, Hee-Jin,Park, Seongsoon,Kim, Sung-Jin,Huh, Seong WILEY-VCH Verlag 2009 European journal of inorganic chemistry Vol.2009 No.19

<P>A facile method was developed for the preparation of bimodal mesoporous siliceous materials with nanostructured pores in which a cationic organic template, n-hexadecyltrimethylammonium hydroxide, was employed as a base catalyst as well as a mesopore structure-directing agent during the slow condensation of tetraethoxysilane. It was possible to alter the pore orientations of smaller pores by adding neutral auxiliary templates such as Brij76 and P123. A series of biomodal mesoporous carbons was also obtained from the bimodal mesoporous silica materials through a nanocasting process. The resulting bimodal mesoporous carbons exhibited decent hydrogen uptake values at 77 K. The maximum hydrogen uptake was 1.33 wt.-% for the sample having the narrowest pores, while keeping a relatively large pore volume. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)</P> <B>Graphic Abstract</B> <P>A simple preparation method of various bimodal mesoporous silica and carbon materials with interesting nanostructures was developed. Their hydrogen uptake abilitieswere investigated at 77 K. The sample with small pores and a large pore volume showed enhanced hydrogen sorption ability. <img src='wiley_img/14341948-2009-2009-19-EJIC200900153-fig000.gif' alt='wiley_img/14341948-2009-2009-19-EJIC200900153-fig000'> </P>

Transforming growth factor-β3-induced Smad signaling regulates actin reorganization during chondrogenesis of chick leg bud mesenchymal cells

Kim, Dongkyun,Kim, Jungsoo,Kang, Shin-Sung,Jin, Eun-Jung Wiley Subscription Services, Inc., A Wiley Company 2009 Journal of cellular biochemistry Vol.107 No.4

<P>Endochondral ossification is characterized by a significant interdependence between cell shape and cytoskeletal organization that accompanies the onset of chondrogenic signaling. However, the mechanisms mediating these interactions have not been well studied. Here, treatment with transforming growth factor (TGF)-β3 at a later stage of chondrogenesis led to activation of Smad-2 signaling and the formation of intense stress fibers, which resulted in suppressing chondrogenic differentiation of leg bud mesenchymal cells. Moreover, specific siRNA knockdown of Smad-2 reduced TGF-β3-induced stress fibers via physical interactions with β-catenin. In conclusion, our results indicate that TGF-β3-induced Smad signaling, in conjunction with β-catenin, is involved in the reorganization of the actin cytoskeleton into a cortical pattern with a concomitant rounding of cells. J. Cell. Biochem. © 2009 Wiley-Liss, Inc.</P><P>This article was published online on 28 May 2009. An error was subsequently identified. This notice is included in the online and print versions to indicate that both have been corrected 8 June 2009. J. Cell. Biochem. 107: 622–629, 2009. © 2009 Wiley-Liss, Inc.</P>

Octahedral Hexahydroxo Rhenium Cluster Complexes [Re₆Q₈(OH)₆]^4–·(Q = S, Se): Synthesis, Structure, and Properties

Yarovoi, Spartak S.,Mironov, Yuri V.,Naumov, Dmitry Y.,Gatilov, Yuri V.,Kozlova, Svetlana G.,Kim, Sung-Jin,Fedorov, Vladimir E. WILEY-VCH Verlag 2005 European journal of inorganic chemistry Vol.2005 No.19

<P>Two novel rhenium cluster compounds, K<SUB>4</SUB>[Re<SUB>6</SUB>S<SUB>8</SUB>(OH)<SUB>6</SUB>]·8H<SUB>2</SUB>O (1) and K<SUB>4</SUB>[Re<SUB>6</SUB>Se<SUB>8</SUB>(OH)<SUB>6</SUB>]·8H<SUB>2</SUB>O (2), containing octahedral cluster chalcogenide anionic complexes [Re<SUB>6</SUB>Q<SUB>8</SUB>(OH)<SUB>6</SUB>]<SUP>4–</SUP> with terminal hydroxo ligands have been synthesized by the reaction of Re<SUB>6</SUB>Q<SUB>8</SUB>Br<SUB>2</SUB> (Q = S, Se) with molten KOH. Two chalcohalide compounds, one known (Cs<SUB>4</SUB>[Re<SUB>6</SUB>S<SUB>8</SUB>Br<SUB>6</SUB>]·2H<SUB>2</SUB>O, 3) and another new (Cs<SUB>3</SUB>[Re<SUB>6</SUB>Se<SUB>8</SUB>Cl<SUB>6</SUB>]·2H<SUB>2</SUB>O, 4), were prepared by reactions of 1 and 2 with CsX and HX (X = Br, Cl) in an aqueous solution. Compounds 1, 2, and 4 have been characterized by the single-crystal X-ray diffraction method. Compounds 1 and 2 are crystallized in triclinic space group P<TEX>$\bar {1}$</TEX> with one formula unit in the cell of dimensions a = 8.4936(8) Å, b = 8.9101(11) Å, c = 10.5940(13) Å, α = 77.935(11)°, β = 75.933(9)°, γ = 71.244(10)°, V = 728.9(1) Å<SUP>3</SUP> (compound 1) and a = 8.613(1) Å, b = 8.996(1) Å, c = 10.057(1) Å, α = 78.587(2)°, β = 77.811(2)°, γ = 71.728(2)°, V = 715.9(2) Å<SUP>3</SUP> (compound 2). Compound 4 crystallizes in the monoclinic space group P2<SUB>1</SUB>/n with two formula units in the cell of dimensions a = 9.819(3) Å, b = 12.925(4) Å, c = 11.756(4) Å, β = 113.38(3)°, V = 1369.6(8) Å<SUP>3</SUP>. Compounds 1 and 2 display luminescent properties. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)</P> <B>Graphic Abstract</B> <P> <img src='wiley_img/14341948-2005-2005-19-EJIC200500284-fig000.gif' alt='wiley_img/14341948-2005-2005-19-EJIC200500284-fig000'> </P>

Organocatalyzed α-Oxyamination of Aldehydes Using Anodic Oxidation

Bui, Nhat-Nguyen,Ho, Xuan-Huong,Mho, Sun-il,Jang, Hye-Young WILEY-VCH Verlag 2009 EUROPEAN JOURNAL OF ORGANIC CHEMISTRY Vol.2009 No.31

<P>Electrochemical oxidation was performed during the organocatalyzed α-oxyamination of aldehydes by using a one-compartment electrolytic cell under galvanostatic conditions. In the presence of substoichiometric amounts of sec-amines, the desired coupling products were formed in good yield. The asymmetric variant of the α-oxyamination of aldehydes was examined by using chiral sec-amines. Control experiments and cyclic voltammetry confirmed the key intermediate of this reaction to be the cationic radical of the enamine derived from the sec-amine catalysts and aldehydes. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)</P> <B>Graphic Abstract</B> <P>Anodic oxidation was used to promote the organocatalyzed α-oxyamination of aldehydes. Under galvanostatic conditions, cationic radical intermediates are formed as key intermediates. Cyclic voltammetry and control experiments were carried out to confirm the proposed intermediates and the mechanism of the reaction. <img src='wiley_img/1434193X-2009-2009-31-EJOC200900871-fig000.gif' alt='wiley_img/1434193X-2009-2009-31-EJOC200900871-fig000'> </P>

Classification and geometric aspects of vector valued Fourier transforms

WILEY-VCH Verlag 2008 Mathematische Nachrichten Vol.281 No.4

<P>It is shown that for any locally compact abelian group 𝔾 and 1 ≤ p ≤ 2, the Fourier type p norm with respect to 𝔾 of a bounded linear operator T between Banach spaces, denoted by ‖T |ℱ𝒯<SUP>𝔾</SUP><SUB>p</SUB>‖, satisfies ‖T |ℱ𝒯<SUP>𝔾</SUP><SUB>p</SUB>‖ ≤ ‖T |ℱ𝒯<SUP>𝔸</SUP><SUB>p</SUB>‖, where 𝔸 is the direct product of ℤ<SUB>2</SUB>, ℤ<SUB>3</SUB>, ℤ<SUB>4</SUB>, … It is also shown that if 𝔾 is not of bounded order then C<SUP>n</SUP><SUB>p</SUB> ‖T |ℱ𝒯<SUP>𝕋</SUP><SUB>p</SUB>‖ ≤ ‖T |ℱ𝒯<SUP>𝔾</SUP><SUB>p</SUB>‖, where 𝕋 is the circle group, n is a onnegative integer and C<SUP>p</SUP> = <LATEX> <img src='wiley_img/0025584X-2008-281-4-MANA200310625-zmn1062501.gif' alt='wiley_img/0025584X-2008-281-4-MANA200310625-zmn1062501'> </LATEX>. From these inequalities, for any locally compact abelian group 𝔾 ‖T |ℱ𝒯<SUP>𝔾</SUP><SUB>2</SUB>‖ ≤ ‖T |ℱ𝒯<SUP>𝕋</SUP><SUB>2</SUB>‖, and moreover if 𝔾 is not of bounded order then ‖T |ℱ𝒯<SUP>𝔾</SUP><SUB>2</SUB>‖ = ‖T |ℱ𝒯<SUP>𝕋</SUP><SUB>2</SUB>‖. The Hilbertian property and B-convexity are discussed in the framework of Fourier type p norms. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)</P>

Pretreatment anemia is associated with poorer survival in patients with stage I and II gastric cancer

Shen, Jian Guo,Cheong, Jae Ho,Hyung, Woo Jin,Kim, Junuk,Choi, Seung Ho,Noh, Sung Hoon Wiley Subscription Services, Inc., A Wiley Company 2005 Journal of surgical oncology Vol.91 No.2

<B>Background and Objectives</B><P>A negative correlation between anemia and outcome has been demonstrated in various cancers treated with radiotherapy. However, it is rarely studied whether this correlation may exist in surgical setting. Our aim was to investigate the relationship between pretreatment anemia and survival in surgically treated patients with gastric cancer.</P><B>Methods</B><P>A total of 1,688 patients who had undergone curative resection for gastric cancer between 1991 and 1995 were reviewed. Anemia was defined as a hemoglobin level <12.0 g/dl. The influence of anemia on patient overall survival was evaluated by univariate and multivariate analysis.</P><B>Results</B><P>Pretreatment anemia was present in 39.9% of the patients. The 10-year overall survival rate in anemic patients was 48.2% as compared with 62.6% in nonanemic patients (P < 0.001). In subgroup analysis according to the stage, the significant difference in 10-year overall survival rate between anemic and nonanemic patients was found in stage I and II gastric cancer (76.1% vs. 83.5% in stage I, P = 0.030; 55.1% vs. 67.2% in stage II, P = 0.043). On multivariate analysis, anemia was an independent prognostic predictor in patients with stage I and II disease (P = 0.007; RR, 1.466; 95% CI, 1.109–1.937).</P><B>Conclusions</B><P>Pretreatment anemia was found to have an independent relationship to the long-term survival of patients with stage I and II gastric cancer. J. Surg. Oncol. 2005;91:126–130. © 2005 Wiley-Liss, Inc. J. Surg. Oncol. 2005;91:?–?. © 2005 Wiley-Liss, Inc.</P>