bluuebunny/crossref_metadata_2025_split huggingface dataset:
Laser photostimulation (660 nm) of wound healing in diabetic mice is not brought about by ameliorating diabetes
Authors: Peplow Philip V. , Chung Tzu‐Yun , Baxter G. David 
Published: November 2011

AbstractBackground and ObjectivesWe have used a 660‐nm laser diode in genetic diabetic mice to stimulate the healing of wounds covered with a Tegaderm HP dressing that causes a retardation of contraction (splinted wounds). It is possible that the stimulation of healing could be due to possible diabetes‐modifying properties of laser light. This has been examined by using the 660 nm laser to irradiate non‐wounded diabetic mice with the same dose and at same location as for wounded diabetic mice.Materials and MethodsTwenty‐two diabetic mice were used and divided into two equal groups. Body weight and water intake of mice were measured daily for 7 days prior to the start of treatment (Day 0). The left flank of mice in the experimental group was irradiated with 660 nm laser, 100 mW, 20 seconds/day, 7 days; for mice in the control group, the left flank was sham‐treated with the laser power supply not switched on. Body weight and water intake of mice were measured to Day 14. On Day 14, the mice were fasted for 4 hours, anaesthetized with sodium pentobarbitone (i.p.) and blood collected by cardiac puncture into heparinized tubes. The plasma was assayed for glucose and glycated hemoglobin A1c.ResultsThere were no significant differences in body weight and water intake over 22 days between mice in the experimental group and control group. On day 14, the mean blood plasma glucose level was not significantly different between the two groups; glycated hemoglobin A1c was not detected in the samples.ConclusionIrradiation of the left flank in diabetic mice with 660 nm laser system does not have a significant hypoglycemic effect, and the laser‐stimulated healing of wounds in diabetic mice is due to cellular and biochemical changes in the immediate wound environment. Lasers Surg. Med. 44:26–29, 2012. © 2011 Wiley Periodicals, Inc.
Myocardial electrical conduction block induced by photosensitization reaction in exposed porcine hearts in vivo
Authors: Ito Arisa , Miyoshi Shunichiro , Kimura Takehiro , Takatsuki Seiji , Fukumoto Kotaro , Fukuda Keiichi , Arai Tsunenori 
Published: November 2011

AbstractBackground and ObjectiveThis study proposes photosensitization reaction for non‐thermal cardiac ablation in arrhythmia therapy. Acute and chronic phase experiments were conducted in exposed porcine hearts to demonstrate the photosensitization reaction‐induced myocardial electrical conduction block in vivo.Study Design/Materials and MethodsThe porcine left atrial appendage was exposed under an open‐chest procedure. Then, a water‐soluble chlorin photosensitizer, NPe6, was injected into the pigs intravenously at 5 or 10 mg/kg. About 15 or 30 minutes after the injection, a 663‐nm continuous‐wave diode laser was irradiated on the surface of the atrial appendage through a silica optical fiber. The laser energy was delivered to the tissue point by point at an energy density of 50–208 J/cm2.ResultsAcute and chronic tissue damages as a result of the photosensitization reaction were determined by electrophysiology and histology, respectively. The change in the myocardial conduction time between two electrodes was measured immediately after the completion of the 35‐mm irradiation line between the electrodes. The conduction delay of 35.5 milliseconds might be due to the change in the conduction pathway induced by transmural acute conduction block with the photosensitization reaction. The tissue temperature increase in the irradiated area was approximately 12.8°C. Azan‐staining revealed about 1‐mm transmural fibrosis of the atrial appendage at 2 weeks after the irradiation (50 J/cm2).ConclusionsThe results suggest that the photosensitization reaction might induce acute and chronic myocardial electrical conduction block. Cardiac ablation with the photosensitization reaction might be a non‐temperature‐mediated methodology for arrhythmia therapy. Lasers Surg. Med. 43:984–990, 2011. © 2011 Wiley Periodicals, Inc.
Laser thermal therapy: Real‐time MRI‐guided and computer‐controlled procedures for metastatic brain tumors
Authors: Carpentier Alexandre , McNichols Roger J. , Stafford R. Jason , Guichard Jean‐Pierre , Reizine Daniel , Delaloge Suzette , Vicaut Eric , Payen Didier , Gowda Ashok , George Bernard 
Published: November 2011

AbstractBackground and ObjectiveWe report the final results of a pilot clinical trial exploring the safety and feasibility of real‐time magnetic resonance‐guided laser‐induced thermal therapy (MRgLITT) for treatment of resistant focal metastatic intracranial tumors.Study DesignIn patients with chemotherapy, whole‐brain radiation, and radiosurgery resistant metastatic intracranial tumors, minimally invasive stereotaxic placement of a saline‐cooled interstitial fiberoptic laser applicator under local anesthesia was followed by laser irradiation during continuous magnetic resonance imaging (MRI) scanning. A computer workstation extracted real‐time temperature‐sensitive information for feedback control over laser delivery. A total of 15 metastatic tumors were treated in 7 patients. Patients were followed with physical exam and imaging for 30 months.ResultsIn all cases, the procedure was well tolerated, and patients were discharged home within 24 hours. Follow‐up imaging at up to 30 months showed an acute increase in apparent lesion volume followed by a gradual and steady decrease. No tumor recurrence within thermal ablation zones was noted. Kaplan–Meier analysis indicated that the median survival was 19.8 months.ConclusionReal‐time magnetic resonance (MR) guidance of laser‐induced thermal therapy (LITT) offers a high level of control. This tool therefore enables a minimally invasive option for destruction and treatment of resistant focal metastatic intracranial tumors. MR‐guided LITT appears to provide a safe and potentially effective treatment for recurrent focal metastatic brain disease. A larger phase II and III series would be of interest to quantify potential median survival advantage. Lasers Surg. Med. 43:943–950, 2011. © 2011 Wiley Periodicals, Inc.
Stepped‐width planar monopole antenna with circular parasitic plane for wireless local area network/worldwide interoperability for microwave access applications
Authors: Pan Chien‐Yuan , Chiu Kuo‐Yung , Jan Jen‐Yea , Chen Hua‐Ming 
Published: November 2011

AbstractThis article demonstrates a new and simple dual‐band design for the planar monopole antenna.The design basically consists of a stepped‐width radiating monopole element with a microstrip feedline for excitation and a circular parasitic plane for generating a resonant mode in the upper band. The measured impedance bandwidth for 10‐dB return loss is from 1.98 to 3.22 GHz and 4.92 to 6.93 GHz, covering the 2.4/5.2/5.8‐GHz wireless local area network bands and 2.5/5.5‐GHz worldwide interoperability for microwave access bands. The measured radiation patterns are similar to typical monopole‐antenna radiation characteristics. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:219–222, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26447
Design of half elliptical ring monopole antennas with elliptical slot in ground plane for future UWB applications
Authors: Ahmed Osama M. H. , Elboushi Ayman M. , Sebak Abdel‐Razik 
Published: November 2011

AbstractIn this letter, a microstrip fed ultra‐wideband (UWB) antenna with different band rejection techniques is presented. The designed antennas consist of a defected ground plane with an elliptical slot and elliptical shaped radiating element. The measured and calculated impedance bandwidth of the proposed antenna ranges from 3 to 14 GHz for a return loss (S11) less than −10 dB. Also, it has a relatively stable radiation patterns over its whole frequency band of interest. Two different techniques have been proposed to achieve band‐notch characteristic in the 5.0‐ to 6.0‐GHz wireless local area network frequency band. The first one uses L‐shaped parasitic strip into the radiating patch, whereas the other one uses two rectangular slits cut away from the ground plane creating defected ground structure. The proposed antenna is considered a good candidate for UWB applications. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:181–187, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26449
A compact circular corner monopole antenna for UWB application
Authors: Yang Lingsheng , Yoshitomi Kuniaki 
Published: November 2011

AbstractA compact microstrip‐fed planar monopole antenna for ultrawideband application is presented.The antenna is formed with a rectangular patch and two quarter circles at each side of the lower corners of the patch. By applying a notch in the truncated ground to improve the impedance bandwidth, a 4.9:1 (3.0–14.7 GHz) S11 <−10 dB‐bandwidth is realized. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:147–150, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26462
A low‐loss planar goubau line and a coplanar‐PGL transition on high‐resistivity silicon substrate in the 57–64 GHz band
Authors: Emond J. , Grzeskowiak M. , Lissorgues G. , Protat S. , Deshours F. , Richalot E. , Picon O. 
Published: November 2011

AbstractPlanar Goubau line (PGL) structures on high‐resistivity silicon are adapted to the 57–64 GHz frequency band. Simulations and measurements show a lower attenuation than with the coplanar line is obtained. Very low losses are attained with a measured average attenuation of 0.064 dB/mm on the whole band. To allow this measurement, coplanar‐PGL transitions have been optimized. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:164–168, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26470
Small monopole antenna design with band‐notched characteristics using inverted T‐shaped form on the patch
Authors: Moosazadeh M. , Esmati Z. 
Published: November 2011

AbstractIn this letter, a printed monopole antenna, consisting of a square patch and a ground plane truncated with two mirror C‐shaped notches for ultra wideband application with variable frequency band‐notch characteristics, is presented.In this antenna, by inserting a modified T‐shaped form inside a rectangular slot cut with variable dimensions on the radiating patch, frequency band‐stop performance is obtained. The proposed antenna operates in the 3.1–10.6‐GHz band and has small overall dimensions of 12 × 16 × 1.6 mm3, while showing the notched band from 5 to 5.9 GHz. The effect of the ground plane notch on the optimization of the voltage standing wave ratio (VSWR) is discussed in detail. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:100–103, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26472
Compact multiband mimo antenna for next generation USB dongle applications
Authors: Han Minseok , Choi Jaehoon 
Published: November 2011

AbstractA compact multiband multiple‐input multiple‐output (MIMO) antenna with an embedded chip inductor is proposed for next generation universal serial bus (USB) dongle applications. The proposed MIMO antenna consists of a longer strip with an embedded chip inductor and a shorter radiating strip. The longer radiating strip with a 15‐nH embedded chip inductor has a length of only about 34 mm (about 0.08 wavelength at 0.77 GHz), but it supports a wide resonant mode for long‐term evolution band 13 (LTE Band 13; 0.746–0.787 GHz) and wireless broadband band (WiBro band; 2.3–2.4 GHz) services. The shorter radiating strip has a length of 12 mm (about 0.1 wavelength at 2.0 GHz) and provides a wide resonant mode at about 2 GHz for wideband code division multiple access band (1.92–2.17 GHz) operation. The two radiating strips occupy a small printed area of about 500 mm2 on the system circuit board of a USB dongle. The proposed MIMO antenna has an isolation of approximately 17 dB at LTE band 13 and the envelope correlation coefficient (ECC) of the two antennas is less than 0.4 over the whole LTE band 13. To evaluate the performance of the proposed antenna, key performance parameters such as the total efficiency, ECC, mean effective gain (MEG), and the MEG ratio are analyzed. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:246–250, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26478
Process and temperature insensitive CMOS oscillator using current sinker compensation
Authors: Kim M. , Jung S. , Yang Y. 
Published: November 2011

AbstractThis article presents a simple complementary metal‐oxide‐semiconductor (CMOS) ring oscillator using a voltage‐controlled delay and RS‐latch, including a compensation circuit for the process and temperature variations.The compensation circuit, added to the original bias circuit, is a simple current sinker which is referenced through a current mirror circuit. The proposed oscillator was designed and implemented using a 0.13 μm CMOS process. The oscillator exhibited a significantly improved frequency variation of ±4.25% for a wide temperature range of from −40 to 80°C. Without the compensation circuit, the variation would have been ±13.39% from the center frequency of 2.33 MHz. The oscillator also showed a low sensitivity of 0.084% to process variation, according to a Monte‐Carlo simulation with 1000 iterations. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:160–163, 2012, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26493
A wideband circularly polarized antenna with Γ‐shaped feed
Authors: Fu Guang , Zhang Zhi‐Ya , Zuo Shao‐Li , Lei Juan , Gong Shu‐Xi 
Published: November 2011

AbstractA wideband circularly polarized antenna with Γ‐shaped feed is presented.The proposed antenna is formed by two shorted bowtie patch antennas and two L‐shaped electric dipoles. It can achieve a measured impedance bandwidth for voltage standing wave ratio (VSWR) ≤ 1.5 of 52% and a 3‐dB axial ratio bandwidth of 55%. For the entire half‐power beamwidth, the axial ratio can be kept below 3 dB. A prototype has been fabricated and tested, and the experimental results validate the design procedure. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:153–156, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26503
Wideband quasi‐yagi antenna fed by microstrip‐to‐slotline transition
Authors: Ta Son Xuat , Kim Byoungchul , Choo Hosung , Park Ikmo 
Published: November 2011

AbstractThis letter presents a wideband quasi‐Yagi antenna fed by a microstrip‐to‐slotline transition. The transition consists of a microstrip radial stub and slot radial stub, both at 90° but with different radii, to achieve wideband impedance matching. The antenna has a measured fractional bandwidth of approximately 46% (4.64–7.42 GHz) for a −10 dB reflection coefficient and a flat gain of 6.0–6.75 dBi with a front‐to‐back ratio and cross‐polarization level better than 17 and −15 dB, respectively, across the bandwidth. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:150–153, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26504
Raman amplified access networks with pump signal recycling for electrical power conversion
Authors: André P.S. , Lima M. J. N. , Rocha A. M. , Fernandes N. , Granada M. , Almeida T. , Chang Jin , Lan Rao , Xiang‐Jun Xin 
Published: November 2011

AbstractNowadays, the structure of the passive optical networks is evolving, to keep the network survivability, the powering of some elements in this kind of networks is a key issue. In this work we propose the recycling of the Raman pump remaining optical power at the receiver to be converted to electrical power. With a 24 dBm optical pump signal a 8 dB on/off gain over 25 km of single mode optical fiber was achieved. Also, the recycling of the pump signal generated 18.1 mW of electrical power at the receiver. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:116–119, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26506
A miniaturized wideband coupled‐line microstrip balun using a new defected ground
Authors: Chiu Cheng‐Nan , Yu Shau‐Jiun 
Published: November 2011

AbstractThis letter proposes a new miniaturized wideband coupled‐line microstrip balun and its design procedure based on an original finding. This finding suggests that the coupled‐line microstrip balun can be realized by using a much smaller high‐pass ground defect instead of a bandstop ground defect. The newly proposed balun is derived initially from a coupled‐line microstrip balun with a typical dumbbell‐shaped defected ground. Following the proposed three‐step design procedure, the size of the final balun is only about 8.3% of the size of the initial one (only 0.00512 wavelength square at the central frequency). In addition, the final balun possesses immunity against the influence of the supporting material. Balun prototypes were created and investigated. Both the simulated and measured results demonstrate the compactness and wideband performance. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:254–257, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26518
A note on generating finer‐grain parallelism in a representation tree
Authors: Vömel Christof 
Published: November 2011

SUMMARYThe representation tree lies at the heart of the algorithm of Multiple Relatively Robust Representations for computing orthogonal eigenvectors of a symmetric tridiagonal matrix without Gram–Schmidt. A representation tree describes the incremental shift relations between relatively robust representations of eigenvalue clusters of an unreduced tridiagonal matrix, which are needed to strongly separate close eigenvalues in the relative sense. At the bottom of the representation tree, each leaf defines a relatively isolated eigenvalue to high relative accuracy.The shape of the representation tree plays a pivotal role for complexity and available parallelism: a deeper tree consisting of multiple levels of nodes involves tasks associated to more work (i.e., eigenvalue refinement to resolve eigenvalue clusters) and less parallelism (i.e., a longer critical path as well as potential data movement and synchronization). An embarrassingly parallel, ideal tree on the other hand consists of a root and leaves only.As highly parallel hybrid graphics processing unit/multicore platforms with large memory now become available as commodity platforms, exploiting parallelism in traditional algorithms becomes key to modernizing the components of standard software libraries such as LAPACK. This paper focuses on LAPACK's Multiple Relatively Robust Representations algorithm and investigates the critical case where a representation tree contains a long sequential chain of large (fat) nodes that hamper parallelism. This key problem needs to be addressed as it concerns all sorts of computing environments, distributed computing, symmetric multiprocessor, as well as hybrid graphics processing unit/multicore architectures. We present an improved representation tree that often offers a significantly shorter critical path and finer computational granularity of smaller tasks that are easier to schedule. In a study of selected synthetic and application matrices, we show that an average 75% reduction in the length of the critical path and 82% reduction in task granularity can be achieved. Copyright © 2011 John Wiley & Sons, Ltd.
Spectroscopic studies of protein folding: Linear and nonlinear methods
Authors: Serrano Arnaldo L. , Waegele Matthias M. , Gai Feng 
Published: November 2011

AbstractAlthough protein folding is a simple outcome of the underlying thermodynamics, arriving at a quantitative and predictive understanding of how proteins fold nevertheless poses huge challenges. Therefore, both advanced experimental and computational methods are continuously being developed and refined to probe and reveal the atomistic details of protein folding dynamics and mechanisms. Herein, we provide a concise review of recent developments in spectroscopic studies of protein folding, with a focus on new triggering and probing methods. In particular, we describe several laser‐based techniques for triggering protein folding/unfolding on the picosecond and/or nanosecond timescales and various linear and nonlinear spectroscopic techniques for interrogating protein conformations, conformational transitions, and dynamics.
A comprehensive library of blocked dipeptides reveals intrinsic backbone conformational propensities of unfolded proteins
Authors: Oh Kwang‐Im , Lee Kyung‐Koo , Park Eun‐Kyung , Jung Youngae , Hwang Geum‐Sook , Cho Minhaeng 
Published: November 2011

AbstractDespite prolonged scientific efforts to elucidate the intrinsic peptide backbone preferences of amino‐acids based on understanding of intermolecular forces, many open questions remain, particularly concerning neighboring peptide interaction effects on the backbone conformational distribution of short peptides and unfolded proteins. Here, we show that spectroscopic studies of a complete library of 400 dipeptides reveal that, irrespective of side‐chain properties, the backbone conformation distribution is narrow and they adopt polyproline II and β‐strand, indicating the importance of backbone peptide solvation and electronic effects. By directly comparing the dipeptide circular dichroism and NMR results with those of unfolded proteins, the comprehensive dipeptides form a complete set of structural motifs of unfolded proteins. We thus anticipate that the present dipeptide library with spectroscopic data can serve as a useful database for understanding the nature of unfolded protein structures and for further refinements of molecular mechanical parameters. Proteins 2011; © 2011 Wiley Periodicals, Inc.
Estimation of damping ratio of TV towers based on ambient vibration monitoring
Authors: Amiri Mohammad Mahdi , Yahyai Mahmood 
Published: November 2011

SUMMARYDamping ratio is an important component in the dynamic analysis and plays a key role in design of supertall buildings. It is necessary to have reliable field measurement records for estimation of structural dynamic characteristics. The main objective of this paper is to estimate eigen mode damping ratio of TV towers as a kind of supertall buildings with the height of more than 250 m. In this regard, field measurements were performed on Milad TV tower, located in Tehran, which has a height of 435 m by ambient vibration monitoring. Damping ratio of this tower is determined using random decrement technique and compared with available data of a few other TV towers.For proposing eigen mode damping ratio of TV towers, it is shown that Rayleigh damping coefficients could not be calibrated properly for tall slender TV towers. A damping estimation chart of TV tower that is a function of natural frequency and structural aspect ratio is proposed, and the chart validity has been checked with field measurement results of other TV towers. The chart shows that structural damping for wind analysis proposed in design codes and standards is overestimated for tall slender TV towers. Copyright © 2011 John Wiley & Sons, Ltd.
Modeling soil–foundation–structure interaction
Authors: Finn WD Liam , Pandey Bishnu H , Ventura Carlos E 
Published: November 2011

SUMMARYThis paper offers a guided tour through the various ways, used in practice, of accounting for soil–structure interaction in design and analysis, ranging from a complete analysis of the total combined system of foundation, soil and structure to approximate models of the system. The focus is on three types of structures: bridges on pile foundations, tall buildings with several levels of underground parking and large basement slabs with shallow embedment. The paper also reports on preliminary results from the study of seismic pressures against deep basement walls commissioned by the Structural Engineers Association of British Columbia. Copyright © 2011 John Wiley & Sons, Ltd.