bluuebunny/crossref_metadata_2025_split huggingface dataset:
Broadband array antenna with Marchand balun for 5.8 GHz band notched UWB application
Authors: Ma Q. , Sun B.‐H. , Li J.‐F. , Liu Q.‐Z. 
Published: March 2009

AbstractA two‐element ultra wideband array antenna with a 5.8 GHz band‐notch function is proposed. A novel Marchand balun feeding structure is chosen for its great merit of the equi‐amplitude and 180° phase difference signals, making the omni‐directional of radiation pattern much better. A simple u‐shape slot is inserted into the radiating patch to create a frequency band‐stop characteristic. The measured VSWR less than 2 is from 3.1 to 10.6 GHz, and the frequency notch band is from 5.7 to 5.9 GHz. The measured results agree well with the simulated. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1537–1539, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24384
Cylindrical metamaterial‐based subwavelength antenna
Authors: Erentok Aycan , Kim Oleksiy S. , Arslanagic Samel 
Published: March 2009

AbstractA subwavelength monopole antenna radiating in the presence of a truncated cylindrical shell, which has a capped top face and is made of a negative permittivity metamaterial, is analyzed numerically by a method of moments for the volume‐surface integral equation on the one hand, and a finite element method on the other hand. It is shown that a center‐fed truncated cylinder, in contrast to an infinite cylinder, provides subwavelength resonances, thus suggesting the possibility of having a subwavelength antenna system. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1496–1500, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24386
A highly linear and efficient two‐stage GaN HEMT asymmetrical Doherty amplifier for WCDMA applications
Authors: Lee Yong‐Sub , Lee Mun‐Woo , Jeong Yoon‐Ha 
Published: March 2009

AbstractIn this article, we propose a highly linear and efficient two‐stage GaN HEMT asymmetrical Doherty power amplifier (ADPA) for WCDMA applications. The first‐stage driving DPA not only improves the linearity as the predistortion circuit but also reduces the power consumption in the driving stage. The second‐stage main ADPA is optimized to achieve high efficiency at a 10‐dB back‐off power. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1464–1467, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24387
Highly directive ISM band cavity antenna using a bi‐layered metasurface reflector
Authors: Burokur Shah Nawaz , Ourir Abdelwaheb , Daniel Jean‐Pierre , Ratajczak Philippe , de Lustrac André 
Published: March 2009

AbstractThe design of a highly directive metamaterial‐based cavity antenna for a 2.46 GHz application is reported. The proposed structure is evolved from a Fabry‐Perot (FP) cavity with a patch antenna acting as the feed and four metallic walls on the lateral sides. One of the two reflectors is the antenna's ground plane and the other is made from a bilayered metamaterial‐based partially reflecting surface (PRS) constituted by a capacitive and an inductive grid. Calculations together with experimental results obtained from the fabricated prototype are presented. The results show a high directivity and low levels for the secondary lobes compared to a 2 × 2 patch antenna array. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1393–1396, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24391
A reconfigurable cavity backed antenna for circular polarization diversity
Authors: Luo Guo Qing , Sun Ling Ling 
Published: March 2009

AbstractThis letter describes the concept and realization of a low‐profile substrate integrated waveguide (SIW) cavity backed antenna with circular polarization diversity. Four shorting posts are placed at the extended center lines of the crossed‐slot. Diodes are utilized to switch the shorting posts on and off. A simple bias circuit is presented to electronically control biased states of the diodes. By switching the biased states the proposed antenna can generate either a right‐hand circularly polarized (RHCP) or a left‐hand circularly polarized (LHCP) radiation. Samples operating at 10 GHz have been fabricated. Experiments have been carried out to validate the proposed method. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1491–1493, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24393
Compact coplanar waveguide bandpass filter using loaded split‐ring resonator
Authors: Wang Shuxin , Liu Haiwen 
Published: March 2009

AbstractA compact coplanar waveguide (CPW) band‐pass filter using a cross‐coupled λ/4 resonator with loaded split‐ring resonators (SRRs) is introduced in this letter. The proposed filter exhibits a quasi‐elliptic function response and its circuit size occupies only 12 × 11.8 mm2(≈0.21λg× 0.20λg). Also, a simple equivalent circuit model is set up. A good agreement between simulations and measurements verify the proposed filter and the validity of design methodology. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1565–1568, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24396
Low power concurrent compact dual‐band receiver front‐end using 0.18‐μm CMOS process
Authors: Cheng Kuo‐Hua 
Published: March 2009

AbstractA fully monolithic dual‐band concurrent receiver front‐end chip for IEEE 802.11a/b/g applications is presented using 0.18‐μm CMOS 1P6M technology. This dual‐band receiver front‐end design uses sub‐harmonic mixer and only one multi‐modulus synthesizer. This low IF circuit design has the advantage of low‐cost and low‐power as comparing with the direct conversion architecture. For a 1.8 V power supply, the overall power consumptions is 66.1 mW. The overall receiver‐chain noise figures are 2.8 dB and 4.3 dB; P1db are −28dBm and −27dBm at 2.45 GHz and 5.25 GHz, and voltage gain is 28.5 dB and 28.1 dB, respectively. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1527–1530, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24399
A planar rhombic antenna with a broad circular polarization bandwidth for integrated single chip radio transceivers
Authors: Yu Ang , Yang Fan , Elsherbeni Atef Z. 
Published: March 2009

AbstractA planar antenna with a broadband circular polarization is proposed for integrated single chip radio transceivers. The antenna uses a printed dual loop structure with a coplanar strip feed, which is compatible with millimeter wave packaging technology. The concept is verified by the measured results of a prototype antenna. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1493–1496, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24400
Study on discontinuous microstrip periodic slow‐wave structure
Authors: He Jun , Wang Bing‐Zhong , Shao Wei 
Published: March 2009

AbstractIn this article, several discontinuous microstrip periodic slow‐wave structures, which possess equal electrical length but different number of unit cells, have been designed and measured. The performance of the periodic structure improves when the number of unit cells increases. However, when the number of unit cells increases to some degree, its characteristics, including cutoff frequency, dispersion, and group delay, get better slightly because of the influence of parasitic parameters. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1455–1458, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24402
Neurobehavioral sequelae of traumatic brain injury
Authors: Riggio Silvana , Wong Meredith 
Published: March 2009

AbstractThe neurobehavioral sequelae of traumatic brain injury consist of a spectrum of somatic and neuropsychiatric symptoms. The neuropsychiatric symptoms are divided into cognitive and behavioral presentations. In the literature, these neurobehavioral sequelae have been called postconcussive symptoms, postconcussive syndrome, and postconcussive disorder; however, the authors of this review do not use this terminology because the symptoms are not restricted to patients with concussion but instead can be found in all traumatic brain injury patients of all injury severities. The development of neurobehavioral sequelae after traumatic brain injury is a multifactorial process. The patient evaluation requires a multidisciplinary approach in order to delineate physiologic dysfunction and place deficits in the context of the patient's preinjury and postinjury psychiatric status. Consequently, the evaluation of the posttraumatic brain injury patient with neurobehavioral sequelae requires a carefully structured history and physical examination with an emphasis on neurological and psychiatric function. Adjunctive evaluations must be tailored to the patient with neuroimaging, neurophysiological, and neuropsychiatric testing. Maximized outcomes may be achieved by the performance of a careful and detailed assessment that places complaints within the context of the individual. Mt Sinai J Med 76:163–172, 2009. © 2009 Mount Sinai School of Medicine
Blast‐related mild traumatic brain injury: mechanisms of injury and impact on clinical care
Authors: Elder Gregory A. , Cristian Adrian 
Published: March 2009

AbstractMild traumatic brain injury has been called the signature injury of the wars in Iraq and Afghanistan. In both theaters of operation, traumatic brain injury has been a significant cause of mortality and morbidity, with blast‐related injury the most common cause. Improvised explosive devices have been the major cause of blast injuries. It is estimated that 10% to 20% of veterans returning from these operations have suffered a traumatic brain injury, and there is concern that blast‐related injury may produce adverse long‐term health affects and affect the resilience and in‐theater performance of troops. Blast‐related injury occurs through several mechanisms related to the nature of the blast overpressure wave itself as well as secondary and tertiary injuries. Animal studies clearly show that blast overpressure waves are transmitted to the brain and can cause changes that neuropathologically are most similar to diffuse axonal injury. One striking feature of the mild traumatic brain injury cases being seen in veterans of the wars in Iraq and Afghanistan is the high association of mild traumatic brain injury with posttraumatic stress disorder. The overlap in symptoms between the disorders has made distinguishing them clinically challenging. The high rates of mild traumatic brain injury and posttraumatic stress disorder in the current operations are of significant concern for the long‐term health of US veterans with associated economic implications. Mt Sinai J Med 76:111–118, 2009. © 2009 Mount Sinai School of Medicine
Cognitive rehabilitation following traumatic brain injury: assessment to treatment
Authors: Tsaousides Theodore , Gordon Wayne A. 
Published: March 2009

AbstractCognitive rehabilitation refers to a set of interventions that aim to improve a person's ability to perform cognitive tasks by retraining previously learned skills and teaching compensatory strategies. Cognitive rehabilitation begins with a thorough neuropsychological assessment to identify cognitive strengths and weaknesses and the degree of change in cognitive ability following a brain injury. The conclusions of the assessment are used to formulate appropriate treatment plans. Common interventions for improvements in attention, memory, and executive function, as well as the nature of comprehensive programs, which combine treatment modalities, are reviewed. Cognitive rehabilitation is effective for mild‐to‐severe injuries and beneficial at any time post‐injury. Sufficient evidence exists supporting the efficacy and effectiveness of cognitive rehabilitation, which has become the treatment of choice for cognitive impairments and leads to improvements in cognitive and psychosocial functioning. Mt Sinai J Med 76:173–181, 2009. © 2009 Mount Sinai School of Medicine
Neurorehabilitation in traumatic brain injury: does it make a difference?
Authors: Greenwald Brian D. , Rigg John L. 
Published: March 2009

AbstractEach year, 1.4 million people in the United States are seen in a hospital for a traumatic brain injury. Those with moderate‐to‐severe traumatic brain injury frequently go through a course of inpatient neurorehabilitation prior to discharge back into the community. A broad overview of neurorehabilitation is presented, including the standards for admission to inpatient rehabilitation and the members and roles of the neurorehabilitation team. Common medical complications that are managed after moderate‐to‐severe traumatic brain injury are reviewed. The spectrum of arousal issues is summarized. The evidence regarding neurorehabilitation is then reviewed. Future studies that are underway to better understand the utility of neurorehabilitation are then discussed. Mt Sinai J Med 76:182–189, 2009. © 2009 Mount Sinai School of Medicine
Management of traumatic brain injury: first link in chain of survival
Authors: Minardi Joseph , Crocco Todd J. 
Published: March 2009

AbstractTraumatic brain injury is a significant cause of morbidity and mortality. The prehospital care of the patient with a traumatic brain injury is critical to maximizing the chances for a good outcome. Prehospital management of the traumatic brain injury patient is directed toward preventing and limiting secondary brain injury while facilitating rapid transport to an appropriate facility capable of providing definitive neurocritical care. Key points in management include the assessment of oxygenation, blood pressure, and mental status (as measured with the Glasgow Coma Scale) and the pupillary examination. Treatment strategies are directed toward maintaining adequate oxygenation and perfusion and treating herniation. Judicious use of temporary hyperventilation and hypertonic saline are considerations. This review provides the most recent evidence regarding the treatment of traumatic brain injury in the prehospital setting and introduces areas in need of future research. Mt Sinai J Med 76:138–144, 2009. © 2009 Mount Sinai School of Medicine
NPO branding: preliminary lessons from major players
Authors: Keller Eileen Weisenbach , Dato‐on Mary Conway , Shaw Doris 
Published: March 2009

Abstract
Are nonprofits (NPOs) exhibiting the brand orientation believed to be critical to successful outcomes? To answer this question, we investigate the brand orientation and brand management of the Young Men's Christian Association (YMCA), American Red Cross (ARC), and The Salvation Army to assess the implementation of brand concepts in two different locations within the USA compared to each agency's central body. Despite the support of some propositions, there exists inconsistent evidence of strong brand management in the organizations studied. The variation of brand visuals, missions, and taglines indicates that good structure, policy, and guidelines are not enough. There must be true brand orientation, which includes oversight of consistent application of all brand constructs to achieve organizational goals. This study provides a framework upon which future in‐depth empirical research may be based. The authors outline these next steps as a foundation for enhancing the study and practice of brand management in NPOs.
Copyright © 2009 John Wiley & Sons, Ltd.
Activation of the ERK/MAPK pathway: a signature genetic defect in posterior fossa pilocytic astrocytomas
Authors: Forshew Tim , Tatevossian Ruth G , Lawson Andrew RJ , Ma Jing , Neale Geoff , Ogunkolade Babatunji W , Jones Tania A , Aarum Johan , Dalton James , Bailey Simon , Chaplin Tracy , Carter Rowena L , Gajjar Amar , Broniscer Alberto , Young Bryan D , Ellison David W , Sheer Denise 
Published: March 2009

AbstractWe report genetic aberrations that activate the ERK/MAP kinase pathway in 100% of posterior fossa pilocytic astrocytomas, with a high frequency of gene fusions between KIAA1549 and BRAF among these tumours. These fusions were identified from analysis of focal copy number gains at 7q34, detected using Affymetrix 250K and 6.0 SNP arrays. PCR and sequencing confirmed the presence of five KIAA1549–BRAF fusion variants, along with a single fusion between SRGAP3 and RAF1. The resulting fusion genes lack the auto‐inhibitory domains of BRAF and RAF1, which are replaced in‐frame by the beginning of KIAA1549 and SRGAP3, respectively, conferring constitutive kinase activity. An activating mutation of KRAS was identified in the single pilocytic astrocytoma without a BRAF or RAF1 fusion. Further fusions and activating mutations in BRAF were identified in 28% of grade II astrocytomas, highlighting the importance of the ERK/MAP kinase pathway in the development of paediatric low‐grade gliomas. Copyright © 2009 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
ΔNp63 isoforms differentially regulate gene expression in squamous cell carcinoma: identification of Cox‐2 as a novel p63 target
Authors: Boldrup Linda , Coates Philip J , Gu Xiaolian , Nylander Karin 
Published: March 2009

AbstractThe p53 homologue p63 produces six different isoforms that are important in development of epithelial tissues and squamous cell carcinoma of the head and neck (SCCHN). In SCCHN, the expression of p63 isoforms is highly complex, with over‐expression of ΔNp63 and p63β isoforms in many tumours. To date, little is known about the functions of different ΔNp63 isoforms and elucidating the distinctive properties of ΔNp63 isoforms will help to clarify how they influence tumour biology. By gene expression profiling of SCCHN cells over‐expressing the ΔNp63 isoforms we identified different effects of the three isoforms, with ΔNp63β being more effective at gene induction than ΔNp63α and ΔNp63γ, whereas ΔNp63γ was most effective at repressing gene expression. Thus, tumours expressing even low levels of ΔNp63β or ΔNp63γ may have distinct clinicopathological characteristics important for metastasis and therapeutic response. Induction of cyclooxygenase‐2 (Cox‐2) was shown by each isoform and data were confirmed by independent quantitative RT–PCR and western blotting. No direct binding of ΔNp63 to the Cox‐2 promoter could be seen, neither could any evidence for Cox‐2 induction as a consequence of activated NF‐κB pathway responses be found. As Cox‐2 is known to inhibit radiotherapy responses in SCCHN patients, data indicate an additional mechanism through which ΔNp63 acts to promote cell survival and influence therapeutic response of SCCHN. MIAME‐compliant data have been deposited in the MIAME Express database (Accession No. E‐MEXP‐1842). Copyright © 2009 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Quantitative cell signalling analysis reveals down‐regulation of MAPK pathway activation in colorectal cancer
Authors: Gulmann Christian , Sheehan Katherine M , Conroy Ronán M , Wulfkuhle Julia D , Espina Virginia , Mullarkey Michelle J , Kay Elaine W , Liotta Lance A , Petricoin III Emanuel F 
Published: March 2009

AbstractMitogen‐activated protein kinases (MAPK) are considered to play significant roles in colonic carcinogenesis and kinase inhibitor therapy has been proposed as a potential tool in the treatment of this disease. Reverse‐phase microarray assays using phospho‐specific antibodies can directly measure levels of phosphorylated protein isoforms. In the current study, samples from 35 cases of untreated colorectal cancer colectomies were laser capture‐microdissected to isolate epithelium and stroma from cancer as well as normal (i.e. uninvolved) mucosa. Lysates generated from these four tissue types were spotted onto reverse‐phase protein microarrays and probed with a panel of antibodies to ERK, p‐ERK, p38, p‐p38, p‐JNK, MEK and p‐MEK. Whereas total protein levels were unchanged, or slightly elevated (p38, p = 0.0025) in cancers, activated isoforms, including p‐ERK, p‐p38 and p‐JNK, were decreased two‐ to four‐fold in cancers compared with uninvolved mucosa (p < 0.0023 in all cases except for p‐JNK in epithelium, where decrement was non‐significant). This was backed up by western blotting. Dukes' stage B and C cancers displayed lower p‐ERK and p‐p38 expression than Dukes' stage A cancers, although this was not statistically significant. It is concluded that MAPK activity may be down‐regulated in colorectal cancer and that further exploration of inhibitory therapy in this system should be carefully evaluated if this finding is confirmed in larger series. Copyright © 2009 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Preparation, characterization, and foaming behavior of poly(lactic acid)/poly(butylene adipate‐co‐butylene terephthalate) blend
Authors: Yuan Hua , Liu Zhiyong , Ren Jie 
Published: March 2009

AbstractIn resent years, poly(lactic acid) (PLA) foams have been studied to replace traditional polymer foams in packaging field. Unfortunately, the foaming rate of PLA is low due to its low viscosity and elasticity. To overcome these shortcomings, a biodegradable polyester, poly(butylene adipate‐co‐terephthalate) (PBAT) was blended with PLA to improve melt properties of PLA. Additionally, maleic anhydride (MAH) and 2,5‐dimethyl‐2,5‐di‐(tert‐butylperoxy)hexane (L101) were added to improve the compatibility of PLA with PBAT. The blends were extruded into foams using a twin‐screw extruder. The properties of extrudates were characterized by FTIR, DSC, ARES Rheometer, and SEM. The results show that complex viscosity of PLA/PBAT blend increases by nearly 100% compared with pure PLA. Meanwhile, cell structure of foamed PLA/PBAT blend is much larger and the distribution of cells is more homogenous. The foaming rate of PLA/PBAT blend foams is raised by nearly 50% than that of pure PLA foams. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers
Effect of resin compositions on microwave processing and thermophysical properties of benzoxazine‐epoxy‐phenolic ternary systems filled with silicon carbide (SiC) whisker
Authors: Jubsilp Chanchira , Takeichi Tsutomu , Hiziroglu Salim , Rimdusit Sarawut 
Published: March 2009

AbstractMicrowave processing of silicon carbide (SiC) whisker filled ternary systems based on benzoxazine, epoxy, and phenolic resins has been investigated using an industrial microwave apparatus at a fixed frequency of 2.45 GHz. The low viscosity molding compound and void‐free cured specimens can easily be obtained from the resin mixtures. Increasing of epoxy mass fraction in the ternary systems provided a better microwave coupling, therefore, a faster curing time and higher conversion under microwave irradiation. However, the greater amount of epoxy resin in the mixture was observed to retard the traditional thermal cure process as seen in the shifting of the exothermic curing peaks to higher temperature. The higher dielectric constant of epoxy resin comparing with the benzoxazine resin can be attributed to the observed phenomenon. Additionally, benzoxazine fraction was found to render a reduction in linear thermal expansion coefficient of the ternary systems. The development of ternary systems yields the polymer systems with high flexibility in resin‐curing agent mixing ratios with relatively high Tg in the broader range of mixing ratios i.e., BEP451‐BEP811. Synergism in glass transition temperature of the ternary systems is also observed with the maximum Tg up to 160°C in BEP721. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers