bluuebunny/crossref_metadata_2025_split huggingface dataset:
Miniaturized bandpass filter design using LC resonators on an organic substrate
Authors: Huang Chien‐Hsiang , Chen Chien‐Hsun , Chiu Chi‐Tsung , Lee Pao‐Nan , Horng Tzyy‐Sheng , Li Jian‐Yu , Chen Cheng‐Chung 
Published: January 2010

AbstractThis letter presents very small LC resonator‐based bandpass filters on an organic substrate for wireless system applications. Because of the lack of a fabrication process for high‐capacitance density capacitors on the applicable substrate, the proposed bandpass filter designs are based on either modified‐T or coupled‐resonator prototype. By carefully taking parasitic and coupling effects into account in the filter synthesis procedure, the presented bandpass filter designs can feature themselves with a Chebyshev response plus multiple transmission zeros, resulting in a low‐insertion loss in the passband as well as a high‐attenuation rate in the roll‐off region. Comparison between EM simulation and measurement results shows excellent agreement. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 547–551, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24966
A highly integrated Ka‐band transceiver module with two channels
Authors: Wang Zhigang , Xu Ruimin , Guo Yunchuan , Zhang Yong , Yan Bo 
Published: January 2010

AbstractA compact Ka‐band square‐wave modulation transceiver module with two receiving and transmitting channels is presented.This module consists of 15 monolithic microwave integrated circuits, two dielectric resonator oscillators, a E‐plane waveguide filter, a coupler, two power dividers, and over 200 components, and works at two Ka‐band operating frequency points. The developed Ka‐band transceiver module is fabricated using advanced packages techniques, which has a compact size of 120 mm × 60 mm × 20 mm and exhibits greater than 500 mw output power with amplitude imbalance of two output ports less than 30 mw, switch rise time and fall time less than 4 ns, isolation of transmitting two channels more than 63 dB, and voltage standing wave ratio of receiving ports better than 1.3. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 615–618, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25005
Investigation of microstrip antenna array stacked structure realized on LTCC for 60 GHz band
Authors: Bondarik Alexander , Jun Dong Suk , Kim Joung Myoun , Yun Je Hoon 
Published: January 2010

AbstractThis article presents the 16‐element antenna array with parasitic microstrip antenna single element. Antenna designed to operate at 60 GHz and its structure based on low‐temperature cofired ceramic (LTCC) substrate. Gain more than 18 dBi and return loss bandwidth about 20% were obtained after antenna geometry parameters optimization. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 648–652, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25006
Receiver gain function: the actual NMR receiver gain
Authors: Mo Huaping , Harwood John S. , Raftery Daniel 
Published: January 2010

AbstractThe observed NMR signal size depends on the receiver gain parameter. We propose a receiver gain function to characterize how much the raw FID is amplified by the receiver as a function of the receiver gain setting. Although the receiver is linear for a fixed gain setting, the actual gain of the receiver may differ from what the gain setting suggests. Nevertheless, for a given receiver, we demonstrate that the receiver gain function can be calibrated. Such a calibration enables accurate comparison of separately acquired NMR signals in quantitative analysis, which frequently requires different receiver gain settings to avoid receiver saturation or achieve optimum sensitivity. The application of receiver gain function, along with the definition of receiving efficiency, allows easy concentration determination by a single internal or external concentration reference. Copyright © 2010 John Wiley & Sons, Ltd.
Genomic profiling of gastric carcinoma in situ and adenomas by array‐based comparative genomic hybridization
Authors: Uchida Masahiro , Tsukamoto Yoshiyuki , Uchida Tomohisa , Ishikawa Yuta , Nagai Takayuki , Hijiya Naoki , Nguyen Lam Tung , Nakada Chisato , Kuroda Akiko , Okimoto Tadayoshi , Kodama Masaaki , Murakami Kazunari , Noguchi Tsuyoshi , Matsuura Keiko , Tanigawa Masato , Seto Masao , Ito Hisao , Fujioka Toshio , Takeuchi Ichiro , Moriyama Masatsugu 
Published: January 2010

AbstractAlthough genomic copy number aberrations (CNAs) of gastric carcinoma at the advanced stage have already been extensively characterized by array comparative genomic hybridization (array CGH) analysis, those of gastric carcinoma in situ (CIS) are still poorly understood. Furthermore, no reports have demonstrated correlations between CNAs and histopathological features of gastric adenoma. In this study, we investigated CNAs of 20 gastric CISs (Vienna category 4.2) and 20 adenomas including seven low‐grade adenomas (LGA; Vienna category 3) and 13 high‐grade adenomas (HGA; Vienna category 4.1), using oligonucleotide‐based array CGH. The most frequent aberrations in CIS were gains at 8q (85%) and 20q (50%), and losses at 5q (50%) and 17p (50%), suggesting that these CNAs are involved in the development of CIS. We found that the pattern of CNAs in HGA was quite different from that in LGA. The most frequent CNAs in HGA were gains at 8q (62%) and 7pq (54%), whereas those in LGA were gain at 7q21.3‐q22.1 (57%) and loss at 5q (43%). Interestingly, gains at 8q and 7pq, both of which occurred most frequently in HGA, were not detected in any cases of LGA. Of note, 8q gain was detected most frequently in both HGA and CIS but was undetected in LGA. Since HGA is believed to have a higher risk of progression to invasive carcinoma than LGA, these data suggest that 8q gain is important for the malignant transformation of gastric adenoma. Copyright © 2010 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Conservative treatment of L‐asparaginase‐associated lipid abnormalities in children with acute lymphoblastic leukemia
Authors: Cohen Hofit , Bielorai Bella , Harats Dror , Toren Amos , Pinhas‐Hamiel Orit 
Published: January 2010

AbstractObjectiveTo determine the incidence and clinical consequences of asparaginase‐associated lipid abnormalities in children with acute lymphoblastic leukemia (ALL).MethodsSixty‐five newly diagnosed children and adolescents aged 0.4–21 years with ALL or lymphoblastic lymphoma were retrospectively evaluated for lipid abnormalities. They were treated according to the ALLIC‐BFM 2002 protocol between 2002 and 2005. Fasting cholesterol levels were measured in all patients and triglycerides (TG) in 42/65 patients.ResultsPrior to treatment, mean cholesterol level was 149 ± 50 mg/dl, and increased to maximal level 274 ± 124 mg/dl during treatment. Mean TG level during treatment was 459 ± 526 mg/dl (range 54–3,009). Twelve patients (28%) had TG levels <200 mg/dl, 18 (43%) had 200–400 mg/dl, 3 (7%) had 400–600 mg/dl, 4 (10%) between 600 and 1,000 mg/dl, and 5 (12%) patients had >1,000 mg/dl. No association was found between TG levels and age or gender. One of the 12 patients with TG >400 mg/dl developed left saggital sinus thrombosis and left frontal lobe infarct. TG level at the time of the event was 2,640 mg/dl. None of the five patients with TG levels >1,000 mg/dl developed pancreatitis. Children with TG levels between 400 and 600 mg/dl were treated by fasting. Fibrates and heparin were added to those with levels >600 mg/dl. Lipid abnormalities normalized in all children upon completion of asparaginase treatment.ConclusionsAbnormalities of lipid profile in children with ALL during asparaginase therapy are relatively common. We recommend measuring TG before and during asparaginase treatment. Initiation of conservative treatment could prevent further increase of TG and decrease the risk of potential complications. Pediatr Blood Cancer 2010;54:703–706. © 2010 Wiley‐Liss, Inc.
Perinatal outcome following suspected fetal abnormality when managed through a fetal management unit
Authors: Lewis Sharon , McGillivray George , Rowlands Shelley , Halliday Jane 
Published: January 2010

AbstractObjectiveTo determine the perinatal outcomes of the first 1057 cases seen at a fetal management unit (FMU).MethodsRecord linkage of FMU data with the Victorian Birth data and the Victorian Births Defects Register (BDR).ResultsNinety‐nine percent of cases were followed up with 811 (77%) linked to the BDR and 202 (22%) linked to the birth data. Almost two‐thirds of cases with birth defects (528) were live births surviving 28 days, 52 (6%) were neonatal deaths, 26 (3%) were stillbirths and 205 (25%) were terminations. The birth defects most prevalent were of the heart/circulatory system (31%). Cases that resulted in a termination were significantly more likely to have multiple birth defects [OR 2.43 (95% CI 1.70, 3.48)], a chromosomal birth defect [OR 3.30 (95% CI 1.96, 5.57)], a lethal birth defect [OR 1.32 (95% CI 1.25, 1.38)], or a syndrome [OR 4.81 (95% CI 2.54, 9.11)]. In this setting, 61% of cases of Down syndrome resulted in a live birth.ConclusionOver three‐quarters of cases referred to the FMU were confirmed with a birth defect and notified to the BDR. Notably, two‐thirds of the cases (with or without a birth defect) were live births surviving 28 days. Copyright © 2010 John Wiley & Sons, Ltd.
Preparation and properties of biocomposites composed of bio‐based epoxy resin, tannic acid, and microfibrillated cellulose
Authors: Shibata Mitsuhiro , Nakai Koichi 
Published: January 2010

AbstractAs new bio‐based epoxy resin systems, glycerol polyglycidyl ether (GPE) and sorbitol polyglycidyl ether (SPE) were cured with tannic acid (TA) at various conditions. When the curing conditions were optimized for the improvement of thermal and mechanical properties, the most balanced properties were obtained for the GPE/TA and SPE/TA cured at 160 °C for 2–3 h at the epoxy/hydroxyl ratio of 1/1. The cured SPE/TA had a higher glass transition temperature (Tg) and tensile strength than the cured GPE/TA. Next, biocomposites of GPE/TA and SPE/TA with microfibrillated cellulose (MFC) were prepared by mixing aqueous solution of the epoxy/curing reagent with MFC, and subsequent drying and curing at the optimized condition. For both the GPE/TA/MFC and SPE/TA/MFC biocomposites, Tg and the storage modulus at rubbery plateau region increased with increasing MFC content over the studied range of 3–15 wt %. The tensile strength at 25 °C for GPE/TA/MFC biocomposite with MFC content 10 wt % was 76% higher than that of control GPE/TA, while the tensile modulus was little improved. On the other hand, the tensile strength and modulus of SPE/TA/MFC biocomposite with MFC content 10 wt % were 30 and 55% higher than those of control SPE/TA, respectively. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 425–433, 2010
Real time monitoring of the crystallization process during the plasma annealing of amorphous silicon
Authors: Ohta Naoki , Imamura Takashi , Shimizu Hirokazu , Kobayashi Tomohiro , Shirai Hajime 
Published: January 2010

AbstractThe transient surface temperature and optical transmissivity profiles during the plasma annealing of amorphous silicon (a‐Si) on quartz substrate was studied using a radio‐frequency (rf) thermal plasma torch (TPT). The film crystallization promoted through solid‐phase crystallization (SPC) at surface temperature of 750 °C, followed by a lateral crystalline grain growth at above 900 °C within millisecond time domain. The spectroscopic ellipsometry study revealed that the film crystallization by a TPT annealing promoted from near the bottom surface due to the sufficient thermal storage in the bulk rather than the top surface. The average crystalline grain size extended to 200–300 nm by adjusting the stage velocity and substrate distance.
Theoretical study of hydrogen microstructure in models of hydrogenated amorphous silicon
Authors: Timilsina Rajendra , Biswas Parthapratim 
Published: January 2010

AbstractWe study the distribution of hydrogen and various hydride configurations in realistic models of a‐Si:H for two different concentrations generated via experimentally constrained molecular relaxation approach (ECMR) 1. The microstructure corresponding to low (<10%) and high (>20%) concentration of H atoms are addressed and are compared to the experimental results with particular emphasis on the size of H clusters and local environment of H atoms. The linewidths of the nuclear magnetic resonance (NMR) spectrum for the model configurations are calculated in order to compare to the experimental NMR data. Our study shows the presence of isolated hydrogen atoms, small and relatively large clusters with average proton–proton neighbor distance in the clusters around 1.6–2.4 Å that have been observed in multiple‐quantum NMR (MQ‐NMR) experiments.
Growth of few‐layer graphene by gas‐source molecular beam epitaxy using cracked ethanol
Authors: Maeda Fumihiko , Hibino Hiroki 
Published: January 2010

AbstractTo obtain few‐layer graphene (FLG), we propose a new growth process based on gas‐source molecular beam epitaxy, in which a cracked‐ethanol source is employed. To show the feasibility of this growth process, we tried to homoepitaxially grow FLG on epitaxial graphene formed on a SiC substrate. The results of Raman scattering, transmission electron microscopy, and in situ X‐ray photoelectron spectroscopy analyses prove that graphene was formed on the substrate, indicating that our approach is feasible for the formation of wafer‐scale FLG.
Decreasing the thickness of the active layer of microcrystalline silicon TFTs
Authors: Belarbi K. , Kandoussi K. , Souleiman I. , Simon C. , Coulon N. , Mohammed‐Brahim T. 
Published: January 2010

AbstractTop‐gate TFTs are fabricated at T < 200 °C using μc‐Si:H film with different thickness, 30, 100 and 200 nm as active layer. Silicon nitride deposited at 150 °C is used as gate insulator. Due to improved crystallinity, mobility increases with the μc‐Si:H thickness. However, the columnar structure of thick μc‐Si:H films induces some shift of the TFT's characteristics. The denser structure of thinnest film, constituted by nano‐grains embedded in amorphous phase, leads to highly stable TFTs. Present results show that a mean way between the needs of high crystallinity, obtained in high thick films, and stability, obtained with dense material, has to be found in μc‐Si:H low temperature technology (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Optical, morphological and spectro‐ scopic characterization of graphene on SiO2
Authors: Giannazzo F. , Sonde S. , Raineri V. , Patanè G. , Compagnini G. , Aliotta F. , Ponterio R. , Rimini E. 
Published: January 2010

AbstractThis work addresses the issue of determining the number of layers in few layers of graphene (FLG) flakes by cross‐comparison of several techniques: optical microscopy (OM), atomic force microscopy (AFM) and micro‐Raman (μR) spectroscopy. SL were preliminarily identified by μR spectroscopy, which allows an unambiguous distinction between monolayers, bilayers and multilayers from the shape and relative intensity of the G and 2D peaks. It is demonstrated that the thickness of a SL measured by tapping mode AFM with respect to the SiO2 substrate is affected by an “offset” ∼0.3 nm.This offset is explained in terms of the different adhesion forces between tip and SiO2 and tip and graphene measured by force spectroscopy curves. A calibration curve relating the height of a flake measured by AFM with the number of graphene layer was obtained. Finally, the optical contrast (OC) variations with FLG thickness was measured for different wavelengths in the visible range and for different oxide thicknesses (from 100 to 300 nm). OC was correlated with the number of layers (independently measured by AFM). (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ToF‐SIMS multivariate characterization of surface modification of polymers by N2H2 atmospheric pressure dielectric barrier discharge
Authors: Sarra‐Bournet C. , Poulin S. , Piyakis K. , Turgeon S. , Laroche G. 
Published: January 2010

AbstractTime of flight secondary ion mass spectrometry (ToF‐SIMS) is a powerful tool for the surface characterization of plasma‐modified surface. However, the SIMS fragmentation patterns of the resulting surface are quite complex and a full interpretation may be prohibitive. As a result, many studies are turning to multivariate statistical methods to simplify the interpretation. In this study, a principal component analysis (PCA) was used to obtain a more detailed interpretation of the surface modification of polymers by an atmospheric pressure plasma. The dataset was obtained from three polymers with different chemical compositions [namely, polyethylene, polyvinylidene fluoride, and poly(tetrafluoroethylene)], where each material was treated with an atmospheric pressure dielectric barrier discharge (DBD) in an atmosphere composed of different N2/H2 ratios. The results are discussed in terms of the suitability of ToF‐SIMS analysis combined with PCA for the discrimination between the three polymers and the possibility to create a predictive model that would describe the plasma surface modification, independent of the polymer substrate chemical composition. Copyright © 2010 John Wiley & Sons, Ltd.
Index compression using 64‐bit words
Authors: Anh Vo Ngoc , Moffat Alistair 
Published: January 2010

AbstractModern computers typically make use of 64‐bit words as the fundamental unit of data access. However the decade‐long migration from 32‐bit architectures has not been reflected in compression technology, because of a widespread assumption that effective compression techniques operate in terms of bits or bytes, rather than words. Here we demonstrate that the use of 64‐bit access units, especially in connection with word‐bounded codes, does indeed provide the opportunity for improving the compression performance. In particular, we extend several 32‐bit word‐bounded coding schemes to 64‐bit operation and explore their uses in information retrieval applications. Our results show that the Simple‐8b approach, a 64‐bit word‐bounded code, is an excellent self‐skipping code, and has a clear advantage over its competitors in supporting fast query evaluation when the data being compressed represents the inverted index for a large text collection. The advantages of the new code also accrue on 32‐bit architectures, and for all of Boolean, ranked, and phrase queries; which means that it can be used in any situation. Copyright © 2010 John Wiley & Sons, Ltd.
Prenatal findings and differential diagnosis of scimitar syndrome and pulmonary sequestration
Authors: Bhide A. , Murphy D. , Thilaganathan B. , Carvalho J. S. 
Published: January 2010

AbstractObjectivesScimitar syndrome and pulmonary sequestration (PS) have overlapping features. This accounts for postnatal descriptions of a ‘sequestrated lung’ in scimitar‐syndrome patients. We review the similarities and differences in these two conditions, and the antenatal ultrasound findings that allow correct prenatal identification and differential diagnosis.MethodsThis was a retrospective analysis of prenatally diagnosed cases of scimitar syndrome or PS that underwent fetal echocardiography between January 1995 and November 2004.ResultsThere were five cases of PS and six of scimitar syndrome. Right‐sided mediastinal shift (ipsilateral relative to the affected lung) was the commonest indication for referral in scimitar syndrome whereas in sequestration, referral was because of hyperechogenic lung and contralateral mediastinal shift. Lung echogenicity was normal in scimitar syndrome but focally increased in PS. Abnormal, unobstructed pulmonary venous drainage was identified prenatally in four cases of scimitar syndrome. It was normal in three fetuses with sequestration but abnormal and obstructed in the other two cases complicated by hydrothorax. Abnormal systemic arterial supply to the affected lung was easily demonstrated in all fetuses with PS, but could not be shown prenatally in scimitar‐syndrome fetuses. Postnatal embolization was warranted in one case with PS and four with scimitar syndrome, one each in the neonatal period.ConclusionPrenatally, scimitar syndrome and PS are clearly distinct entities based on lung echogenicity and laterality of mediastinal shift. Hyperechogenic lung and dextrocardia indicate the possibility of PS and scimitar syndrome, respectively. Complete delineation of the vascular pattern should be attempted in all, but is more challenging in scimitar syndrome. Obstructed venous return in PS may identify fetuses at risk of developing hydrothorax. Copyright © 2010 ISUOG. Published by John Wiley & Sons, Ltd.
A position‐based routing algorithm in 3D sensor networks
Authors: Al tahan Alaa M. , Watfa Mohamed K. 
Published: January 2010

AbstractAs large‐scale sensor networks become more feasible, properties such as stateless nature and low maintenance overhead make position‐based routing increasingly more attractive. Motivated by the fact that sensor networks would probably be deployed in a three‐dimensional space, we present a novel 3D geographical routing (3DGR) algorithm that makes use of the position information to route packets from sources to destinations with high path quality and reliability. The locality and high scalability of this algorithm make it suitable for wireless sensor networks. It provides high adaptability to changes in topology and recovery of link failures which increases its reliability. We also incorporate battery‐aware energy efficient schemes to increase the overall lifetime of the network. To reduce latency, a method of keeping a small record of recent paths is used. We also show that location errors will still result in good performance of our algorithm while the same assumptions might yield bad performance or even complete failures in other popular geographical routing algorithms. We evaluate the 3DGR protocol using simulation. Compared to other geographic routing algorithms, we find that 3DGR exhibits noticeably longer network lifetime, smaller path stretch, smaller end‐to‐end delay, and better packet delivery ratio. Copyright © 2010 John Wiley & Sons, Ltd.
On the energy cost of authenticated key agreement in wireless sensor networks
Authors: Galindo David , Roman Rodrigo , Lopez Javier 
Published: January 2010

AbstractWireless sensors are battery‐powered devices which are highly constrained in terms of computational capabilities, memory and communication bandwidth. While battery life is their main limitation, they require considerable energy to communicate data. Due to this, it turns out that the energy saving of computationally inexpensive primitives (like symmetric key cryptography (SKC)) can be nullified by the bigger amount of data they require to be sent. In this work, we study the energy cost of key agreement protocols between peers in a network using asymmetric key cryptography. Our main concern is to reduce the amount of data to be exchanged, which can be done by using special cryptographic paradigms like identity‐based and self‐certified cryptography. The main news is that an intensive computational primitive for resource‐constrained devices, such as non‐interactive identity‐based authenticated key exchange, performs comparably or even better than traditional authenticated key exchange (AKE) in a variety of scenarios. Moreover, protocols based in this primitive can provide better security properties in real deployments than other simple protocols based on symmetric cryptography. Our findings illustrate to what extent the latest implementation advancements push the efficiency boundaries of public key cryptography (PKC) in wireless sensor networks (WSNs). Copyright © 2010 John Wiley & Sons, Ltd.