bluuebunny/crossref_metadata_2025_split huggingface dataset:
The benefits of photodynamic therapy on vertebral bone are maintained and enhanced by combination treatment with bisphosphonates and radiation therapy
Authors: Lo Victor C. K. , Akens Margarete K. , Wise‐Milestone Lisa , Yee Albert J. M. , Wilson Brian C. , Whyne Cari M. 
Published: April 2013

AbstractPhotodynamic therapy (PDT) has been shown to ablate tumors within vertebral bone and yield short‐term improvements in vertebral architecture and biomechanical strength, in particular when combined with bisphosphonate (BP) treatment. Longer‐term outcomes of PDT combined with current treatments for skeletal metastases are essential to understand its therapeutic potential. The objective of this study is to evaluate the response of vertebrae to PDT after a longer (6‐week) time period, alone and combined with previous BP or radiation treatment (RT). Sixty‐three female rnu/rnu rats were randomized to six treatment groups: untreated control, BP‐only, RT‐only, PDT‐only, combined BP + PDT and combined RT + PDT. L2 vertebrae were structurally analyzed through µCT‐based analysis, axial compressive load‐to‐failure testing and histological analysis of morphology, osteoid formation and osteoclast activity. Combined BP + PDT treatment yielded the largest improvements in bone architecture with combined RT + PDT treatment yielding similar findings, but of a lesser magnitude. Mechanically, ultimate force and stress were correlated to stereological parameters that demonstrated a positive structural effect from combinatory treatment. Increased osteoid formation was observed in both combination therapies without any significant differences in osteoclast activity. Overall, multimodality treatment demonstrated a sustained positive effect on vertebral structural integrity, motivating PDT as a minimally‐invasive adjuvant treatment for spinal metastases. © 2012 Orthopaedic Research Society Published by Wiley Periodicals, Inc. J Orthop Res 31:1398–1405, 2013
Sentinel lymph node status is the most important prognostic factor in patients with melanoma of the scalp
Authors: Cappello Zachary J. , Augenstein Adam C. , Potts Kevin L. , McMasters Kelly M. , Bumpous Jeffrey M. 
Published: April 2013

Objectives/HypothesisTo compare clinicopathologic and prognostic factors associated with scalp melanomas and nonscalp melanomas of the head and neck (H&N).Study DesignPost hoc analysis of the database from a multi‐institutional, prospective, randomized study.MethodsClinicopathologic factors were assessed and correlated with survival and recurrence. Univariate and multivariate analysis of prognostic factors affecting disease‐free survival and overall survival were performed.ResultsOf 405 patients with H&N melanomas ≥1.0 mm Breslow thickness, 109 patients had melanoma of the scalp. All were Caucasian (100%), with most being male (79.5%) with a mean age of 49.8 years. The mean Breslow thickness was 2.4 mm; 25% had signs of ulceration. Sentinel lymph node (SLN) positivity was seen in 20.9% of scalp melanoma patients, and was more likely in younger patients (44.7 vs. 50.8 years, P = .04) and in those with a Breslow thickness of 2 to 4 mm (P = .005). The incidence of locoregional and distant recurrence were similar. Overall survival for scalp melanoma patients was significantly impacted by SLN positivity (P = .03), whereas Breslow thickness and ulceration status predicted poorer survival in nonscalp melanoma patients (P = .005, P < .0001, respectively).ConclusionsIn the Sunbelt Melanoma Trial, SLN status was the strongest predictor of overall survival in scalp melanoma. Tumor thickness and ulceration correlated with poorer overall survival in nonscalp H&N melanoma. The prognostic significance of SLN status in the H&N may vary with the melanoma site.Level of Evidence2c.
Design methodology of high‐power and high‐efficiency composite amplifiers
Authors: Djukanovic Milena , Piattella Luca , Roberto Natalino , Tommasino Pasquale , Trifiletti Alessandro 
Published: April 2013

AbstractA methodology to design high‐power amplifiers composed of several amplifier blocks and passive combiners/dividers is proposed.The optimum matching condition between amplifiers and combiners has been found using the mixed‐mode S‐parameters approach. Measurements and computer‐aided design simulations have been successfully used to validate the proposed approach. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1500–1504, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27600
A novel ultrawideband antenna with switchable notch band
Authors: Dikmen Cengizhan M. , Çimen Sibel , Çakır Gonca 
Published: April 2013

AbstractIn this study, an ultrawideband antenna with variable frequency notch band characteristics is presented. Using only one pin diode, which is mounted to the back side of the antenna, WLAN signals (5.15 and 5.875 GHz) are easily suppressed. The designed antenna bandwidth is 2–11 GHz covering the entire band assigned for the UWB application, which is more than 135%. The detailed design considerations are described in the article. The proposed antenna is implemented, and the experimental results are carried out to validate simulation results. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1461–1466, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27602
Compact half‐mode substrate integrated waveguide bandpass filters with capacitively loaded complementary single split ring resonators
Authors: Huang Liwen , Robertson Ian D. , Yuan Naichang 
Published: April 2013

AbstractA novel compact half‐mode substrate integrated waveguide (HMSIW) filter with capacitively loaded complementary single split ring resonators (CSSRRs) is presented in this article.The proposed structure demonstrates lower resonant frequency and enhanced miniaturization compared to the HMSIW with conventional CSSRRs due to the additional capacitance generated by an additional conductor connected to the inner metal disk and overlaid across the ground plane of the CSSRR. Even lower resonant frequency and greater miniaturization can be achieved conveniently by increasing the area of the overlap or using thin dielectric substrate and the technique can readily be realized in a range of multilayer technologies. The equivalent circuit model for the proposed structure of the HMSIW with the capacitively loaded CSSRR is derived and a second‐order bandpass filter with the proposed structure, operating at 4.92 GHz, is designed and fabricated. Excellent agreement is achieved between the simulation and the measurement. The proposed HMSIW filter with capacitively loaded CSSRRs shows good selectivity, low loss, and compact size, with the total size being only 9.8 × 7 mm2 (0.17 λ0 × 0.115 λ0) without the feed lines. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1602–1606, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27604
Low phase noise oscillator using a new planar hairpin resonator for X‐band applications
Authors: Shrestha Bhanu , Yoon Ki‐Cheol , Lee Jeong‐Hun 
Published: April 2013

AbstractThis article proposed a new high loaded quality factor (QL) hairpin resonator with a combination of a stepped impedance resonator and single split ring resonator and its application to low phase noise oscillator for X‐band applications.A new resonator has a good characteristic of S‐parameter responses. The microwave oscillator is designed at 10 GHz that exhibited a low phase noise characteristic due to the high loaded QL of the new resonator. A series feedback network is used to generate the negative resistance to make oscillation. Experimental results of the microwave oscillator show the phase noise characteristic of −103.69 dBc/Hz at 100 kHz offset with output power of 15.56 dBm. The second harmonic suppression is −32.25 dBc, which is very important in wireless communication system. The figure of merit of the fabricated oscillator is −180 dBc/Hz. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1508–1511, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27608
A 5‐GHz 4/8‐element MIMO antenna system for IEEE 802.11AC devices
Authors: Sharawi Mohammad S. 
Published: April 2013

AbstractA highly compact 2 × 2 (four element) and 2 × 4 (eight element) multiple‐input‐multiple‐output (MIMO) antenna systems are designed for the IEEE 802.11ac standard. The antennas operate in the 5‐GHz band with a minimum effective bandwidth of 80 MHz. The elements of the MIMO antenna system are patch antennas loaded with complementary split‐ring resonators. A minimum isolation of 10.5 dB and maximum gain of −0.8 dBi are measured. Total size of the MIMO antenna systems is 50 × 100 × 0.8 mm3. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1589–1594, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27611
Control scheme of harmonics and third‐order intermodulation distortion with composite right/left‐handed structure for linearity enhancement of power amplifier module
Authors: Lee Chongmin , Seo Chulhun 
Published: April 2013

AbstractIn this article, in order to enhance the linearity of power amplifier modules (PAM), we have suppressed the harmonics at the output port of a high‐power amplifier (HPA) and cancelled the third‐order intermodulation distortion (third IMD) by a predistortion scheme. The matching network to suppress the harmonics consists of metamaterial like the composite right/left‐handed structure. Both the second and third harmonics are suppressed over 27 dBc. A phase of generated third IMD at the output of the drive amplifier has changed in order to offset the third IMD of HPA. The harmonics of the proposed PAM suppresses over 6 dB more than a single HPA and over 20 dB more than a reference power amplifier. The PAM has 37 dBm of output power and 21.6 dB of power gain. The second harmonic and third IMD are −53 and −42.5 dBc about PAM, respectively. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1497–1500, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27625
Design and accuracy analysis of a broadband six‐port reflectometer utilizing coupled‐line directional couplers
Authors: Staszek Kamil , Gruszczynski Slawomir , Wincza Krzysztof 
Published: April 2013

AbstractA design of a broadband six‐port reflectometer has been presented.Broad bandwidth has been achieved with the use of coupled‐line directional couplers. An appropriate modification of a standard six‐port which ensures uniform circle centers' distribution against frequency has been proposed. The influence of power detectors' uncertainty on the calibration procedure and measurement results is discussed, and the estimated measurement accuracy is given. The performance of the presented six‐port reflectometer has been experimentally verified by measurements of the reflection coefficient in a frequency range 2–3.5 GHz. The obtained results are in good agreement with measurements performed with a commercial vector network analyzer. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1485–1490, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27607
A compact high directional beam antenna for WiMAX and WiFi application
Authors: Jusoh Muzammil , Jamlos M.F. , Kamarudin Muhammad R. , Sabapathy Thenna , Jais Mohd I. 
Published: April 2013

AbstractA high directional beam antenna for wireless interoperability microwave access (WiMAX) and wireless fidelity (WiFi) is proposed. With a single circular radiator and a full ground plane, the antenna has successfully achieved a high directional gain of 6.7 dBi. Moreover, the proposed antenna is compact with a square substrate dimension of 50 × 50 mm2. The implementation of the slot with a dimension of 0.8 × 10 mm2 at the center of the radiator has resulted the circular current distribution that leads to the antenna efficiency of up to 87%. The patch antenna performed under tolerable S11 of −10 dB covering operating frequencies of 2.36 GHz up to 2.40 GHz. Parametric study of the narrow slot size, coaxial port position, and the substrate size have been conducted in order to achieve the best antenna dimension with an optimum performance. The measured radiation patterns of the proposed single antenna show a top main beam of 0° and a peak side‐lobe level of −17.6 dB, exhibiting a good agreement with the simulated results. Both simulation and measurement results prove that this optimized circular antenna is reliable for IEEE 802.16d fixed WiMAX, IEEE 802.16e mobile WiMAX, and WiFi application. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1686–1692, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27638
Second harmonic suppression bandpass filter using nonuniform open stubs
Authors: Jun Sungyun , Chang Kai 
Published: April 2013

AbstractThis article presents a bandpass filter with second harmonic suppression using nonuniform open stubs.The proposed bandpass filter uses the nonuniform open stub instead of the uniform open stub to suppress the second spurious harmonic frequency. The nonuniform open stub consists of two serial combined stepped impedance resonators with different characteristic impedances and different electrical lengths. The use of nonuniform open stubs improves the second harmonic suppression. The proposed bandpass filter using nonuniform open stub provides the broad bandwidth outside the passband without external circuits. The proposed bandpass filter has a return loss below 10 dB from 2.42 to 2.54 GHz and improved second harmonic suppression of 48 dB at 4.54 GHz. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1451–1453, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27640
Versatile and efficient hybrid‐ring architecture for advanced radar functionalities
Authors: Zucca Marco , Ciattaglia Matteo , Pintauro Roberto , Valerio Guido , Galli Alessandro 
Published: April 2013

AbstractAn original architecture based on composite configurations of printed‐circuit hybrid rings is developed for flexible signal‐processing functionalities in advanced monopulse radar applications. The modularity of the proposed topology, together with proper design choices, strongly simplifies the structure of the beam forming network, reducing the relevant ohmic losses, and consequently improving the antenna gain. The circuit also allows us to manage only two radio frequency channels (instead of the conventional three), combining the delta‐ and omnidirectional channel functions. The principles of the structure are presented, and a specific layout is designed. Stripline prototypes are fabricated and tested for L‐band applications. The compared results of simulations and measurements fully confirm the interesting performance of this device. The versatility of the architecture is illustrated further considering alternative circuit implementations. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1663–1670, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27647
Frequency switchable branch‐line hybrid coupler
Authors: Chongcheawchamnan Mitchai , Julrat Sakol , Shafique Mohammad F. , Pamornak Burawich , Robertson Ian D. 
Published: April 2013

AbstractThis article first presents a frequency‐selectable branch‐line hybrid coupler.To provide a frequency‐selection function, a dual‐band band‐pass transmission‐line transformer (TLT) with a frequency selective function is used. This is achieved by replacing a dual‐band TLT with a variable capacitively loaded spur‐line filter. The technique is demonstrated with a design at 0.8 and 1.75 GHz. Measured S‐parameter results confirm the validity of the technique. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1661–1663, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27648
Erratum: Analysis of crosstalk between 10 Gb/s × 64 channels in two‐pump fiber optical parametric amplifier
Authors: Callegari Fulvio A. , Marconi Jorge D. , Fragnito Hugo L. 
Published: April 2013

AbstractOriginally published Microwave Opt Technol Lett 55:926–929, 2013. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1703, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27668 (Original article DOI 10.1002/mop.27408)
Psychologic Disorders and Statin Use: A Propensity Score‐Matched Analysis
Authors: Mansi Ishak , Frei Christopher R. , Pugh Mary J. , Mortensen Eric M. 
Published: April 2013

Study ObjectiveTo evaluate the association between statin therapy and the risk of psychologic disorders including schizophrenia, psychosis, major depression, and bipolar disorder in a military population.DesignRetrospective, observational, population‐based, propensity score‐matched, cohort study.SettingDatabase of a patient population enrolled in the San Antonio Military Multi‐Market Area as Tricare Prime or Plus.PatientsMedical records were reviewed from 46,249 patients aged 30–85 years who were continuously enrolled in the San Antonio Military Multi‐Market Area as Tricare Prime or Plus from October 1, 2003–March 1, 2010. Data were obtained from the Military Health System Management Analysis and Reporting Tool (M2). Based on drug fills during fiscal year 2005, patients were stratified as statin users (13,626 patients received at least 90‐days supply of statin) or nonusers (32,623 patients never received a statin during the study period). A propensity score‐matched cohort of 6972 statin users and 6972 nonusers from this population was created.Measurements and Main ResultsThe occurrence of psychologic disorders between October 1, 2005, and March 1, 2010, was determined using prespecified groups of ICD‐9‐CM, Psych1: schizophrenia, schizoaffective disorders, and other psychosis; Psych2: major depression and bipolar disorder; Psych3: all psychologic disorders as identified by the Agency for Health Research and Quality‐Clinical Classifications (except for categories of childhood or developmental psychiatric disorders). Between matched pairs of statin users and nonusers, the odds ratios and 95% confidence intervals were as follows: Psych1 (0.9, 0.75–1.05), Psych2 (1.02, 0.94–1.11), and Psych3 (1.02, 0.96–1.1), respectively.ConclusionThe risk of developing psychologic disorders was similar in this cohort of propensity score‐matched statin users and nonusers.
Investigation of charge transport properties in conducting copolymers of aniline with 3‐aminobenzenesulfonic acid for their applications as antistatic encapsulation materials blended with low‐density polyethylene
Authors: Kaur Amarjeet , Saharan Ritu , Dhawan Sundeep K 
Published: April 2013

AbstractThe electrostatic charge dissipative (ESD) properties of conducting self‐doped and PTSA-doped copolymers of aniline (AA), o‐methoxyaniline (methoxy AA) and o‐ethoxyaniline (ethoxy AA) with 3‐aminobenzenesulfonic acid (3‐ABSA) blended with low‐density polyethylene (LDPE) were investigated in the presence of external dopant p‐toluenesulfonic acid (PTSA). Blending of copolymers with LDPE was carried out in a twin‐screw extruder by melt blending by loading 1.0 and 2.0 wt% of conducting copolymer in the LDPE matrix. The conductivity of the blown polymers blended with LDPE was in the range 10−12–10−6 S cm−1, showing their potential use as antistatic materials for the encapsulation of electronic equipment. The DC conductivity of all self‐doped homopolymers and PTSA‐doped copolymers was measured in the range 100–373 K. The room temperature conductivity (S cm−1) of self‐doped copolymers was: poly(3‐ABSA‐co‐AA), 7.73 × 10−4; poly(3‐ABSA‐co‐methoxy AA), 3.06 × 10−6; poly(3‐ABSA‐co‐ethoxy AA), 2.99 × 10−7; and of PTSA‐doped copolymers was: poly(3‐ABSA‐co‐AA), 4.34 × 10−2; poly(3‐ABSA‐co‐methoxy AA), 9.90 × 10−5; poly(3‐ABSA‐co‐ethoxy AA), 1.10 × 10−5. The observed conduction mechanism for all the samples could be explained in terms of Mott's variable range hopping model; however, ESD properties are dependent upon the electrical conductivity. The antistatic decay time is least for the PTSA‐doped poly(3‐ABSA‐co‐AA), which has maximum conductivity among all the samples. © 2013 Society of Chemical Industry
Nonassociativity, Malcev algebras and string theory
Authors: Günaydin M. , Minic D. 
Published: April 2013

AbstractNonassociative structures have appeared in the study of D‐branes in curved backgrounds. In recent work, string theory backgrounds involving three‐form fluxes, where such structures show up, have been studied in more detail. We point out that under certain assumptions these nonassociative structures coincide with nonassociative Malcev algebras which had appeared in the quantum mechanics of systems with non‐vanishing three‐cocycles, such as a point particle moving in the field of a magnetic charge. We generalize the corresponding Malcev algebras to include electric as well as magnetic charges. These structures find their classical counterpart in the theory of Poisson‐Malcev algebras and their generalizations. We also study their connection to Stueckelberg's generalized Poisson brackets that do not obey the Jacobi identity and point out that nonassociative string theory with a fundamental length corresponds to a realization of his goal to find a non‐linear extension of quantum mechanics with a fundamental length. Similar nonassociative structures are also known to appear in the cubic formulation of closed string field theory in terms of open string fields, leading us to conjecture a natural string‐field theoretic generalization of the AdS/CFT‐like (holographic) duality.
Synthesis and Crystal Structures of Sodium and Calcium ­Complexes with the Ligand N‐(2,6‐Dimethylphenyl)diphenylphosphinic Amide
Authors: Naktode Kishor , Kottalanka Ravi K. , Jana Salil K. , Panda Tarun K. 
Published: April 2013

AbstractThe sodium complex [{Ph2P(O)NH(2,6‐Me2C6H3)}Na{Ph2P(O)N(2,6‐Me2C6H3)}]2 (2) with the ligand N‐(2,6‐dimethylphenyl)diphenylphosphinic amide was synthesized involving the reaction of the neutral ligand [Ph2P(O)NH(2,6‐Me2C6H3)] (1) and sodium bis(trimethylsilyl)amide in toluene at 60 °C. The calcium complex [{Ph2P(O)NH(2,6‐Me2C6H3)CaI(THF)3}I] (3) was obtained by the reaction between the neutral ligand 1 and anhydrous calcium diiodide in THF at ambient temperature. The solid‐state structures of the complexes were established by single‐crystal X‐ray diffraction analysis. In the solid‐state structure of 2, the sodium ion is coordinated through the chelation of oxygen atom attached to the phosphorus atom. Two different P–N and P–O bond lengths are observed, which indicates that one ligand moiety is anionic, whereas the second one is neutral. In the solid‐state structure of 3, the calcium atom adopts distorted octahedral arrangement through the ligation of two phosphinic amide ligands, three THF molecules, and one iodide ion.
Ba2Cd(B3O6)2: A Congruent‐Melting Compound with Isolated B3O6 Units
Authors: Dong Xiaoyu , Cui Liang , Shi Yunjing , Pan Shilie , Zhou Zhongxiang , Yang Zhihua , Zhang Bingbing , Jiang Xiangzhan , Yang Yun , Chen Zhaohui , Huang Zhenjun 
Published: April 2013

AbstractThe single crystals of Ba2Cd(B3O6)2 were grown by the spontaneous crystallization method for the first time. They crystallize in the centrosymmetric trigonal space group R$\bar{3}$ with a = 7.143(3) Å, c = 17.405(16) Å, and Z = 3. The structure is characterized by isolated B3O6 units, and the Ba2+ and Cd2+ cations connect with B3O6 rings to form three dimensional structure. The TG/DSC and XRD results reveal that Ba2Cd(B3O6)2 melts congruently. First‐principles electronic structure calculation performed with the density functional theory (DFT) method shows that the calculated bandgaps are 4.66 eV, which is in good agreement with the UV/Vis/NIR experimental value 4.59 eV. The calculation shows that the Ba2Cd(B3O6)2 crystal has a large birefringence (Δn = 0.0875–0.0569 from 270 nm to 2600 nm), which demonstrates that Ba2Cd(B3O6)2 is a potential birefringence crystal.