bluuebunny/crossref_metadata_2025_split huggingface dataset:
In vivo real time monitoring of vasoconstriction and vasodilation by a combined diffuse reflectance spectroscopy and Doppler optical coherence tomography approach
Authors: Douplik A. , Morofke D. , Chiu S. , Bouchelev V. , Mao L. , Yang V.X.D. , Vitkin A. 
Published: June 2008

AbstractBackground and ObjectivesA combined diffuse reflectance (DR) spectroscopy and doppler optical coherence tomography (DOCT) approach may offer a powerful means for assessment of tissue function, and potentially provide a way for earlier cancer detection through non‐invasive local blood supply measurements. The goal of the study was to compare a DR‐derived blood‐content‐related index to a measure of local blood supply flow as furnished by DOCT during manipulations with blood circulation (vasoconstriction and vasodilation), investigate similarities and differences, complementarity of techniques, and then applying these results to the underlying biology.Study Design/Materials and MethodsSimultaneous DR–DOCT measurements of local blood supply were conducted during drug and mechanically‐induced vasoconstriction and vasodilatation on an externalized intact rat gut in vivo. A simple heuristic metric, termed Blood Supply Index was derived from the spectroscopic DR data. This metric variance due to mechanical and pharmacological manipulation of the local blood supply was recorded, and compared with that of two DOCT‐derived metrics, namely normalized blood velocity (vrel) and blood vessel diameter (D).Summary and ConclusionsDuring vasoconstriction and vasodilatation, the local blood response was successfully visualized by both DOCT and DR metrics and a reproducible correlation was found between these two measurements. A combined DR‐DOCT approach may evolve into a technologically‐viable method for cross‐validation of the derived haemodynamic metrics, yielding a more reliable functional tissue assessment tool for accurate cancer diagnosis and staging. Lesers Surg. Med. 40:323–331, 2008. © 2008 Wiley‐Liss, Inc.
Harvesting of intraoral autogenous block grafts from the chin and ramus region: Preliminary results with a variable square pulse Er:YAG laser
Authors: Stübinger Stefan , Nuss Katja , Landes Constantin , von Rechenberg Brigitte , Sader Robert 
Published: June 2008

AbstractBackground and ObjectivesIt was the aim of this pilot study to evaluate the feasibility, benefits and limitations of a variable square pulse (VSP) Er:YAG laser for harvesting intraoral bone grafts from either the chin or ramus region.Materials and MethodsIn 12 patients (5 female, 7 male) a VSP Er:YAG laser was used to harvest bone grafts either from the ramus (3) or the symphyseal area (9). For the osteotomies, the Er:YAG laser was applied with a pulse energy of 1,000 mJ, a pulse duration of 300 microseconds, and a frequency of 12 Hz (energy density 157 J/cm2). The spot size was 0.9 mm and the handpiece was kept at a distance of about 10 mm from the bone surface.ResultsThere was no visible carbonization or osseous debris on the surface of the osteotomy gap. Damage of adjacent soft tissue structures by mechanical or thermal trauma was minimal. Cutting efficiency was excellent and the overall time required for the procedure was not increased. However, due to a free manual positioning of the laser beam in the non‐contact mode, it was difficult to get a well defined osteotomy line without irregularities on the surface. Slight deviations of the original angulation of the laser beam led to considerable bone loss which restricted osteotomy of ramus grafts to three cases. Depth control was limited to visual inspection.ConclusionThe bone ablation technique using a (VSP) Er:YAG laser yielded superior clinical results without impairment of wound healing and in comparison to other laser systems, no significant time loss occurred. Yet, the missing depth control and the necessity of carefully handling the laser beam position and its angulation limit the use of a (VSP) Er:YAG laser to regions where a safe and fixed guidance of the laser beam is feasible. Lesers Surg. Med. 40:312–318, 2008. © 2008 Wiley‐Liss, Inc.
Fractional photothermolysis for the treatment of granuloma annulare: A case report
Authors: Karsai Syrus , Hammes Stefan , Rütten Arno , Raulin Christian 
Published: June 2008

AbstractBackground and ObjectiveTo date, reports on the safe and effective laser treatment of disseminated granuloma annulare (GA) are still limited.Study Design/Patient and MethodsA 58‐year‐old Caucasian female with disseminated GA was treated with fractional photothermolysis (FP) using a 1,440‐nm Nd:YAG laser. Four lesions on the patient's left upper arm were defined as the “test region” with the remaining untreated areas serving as controls.ResultsA complete remission was achieved after two to three treatment sessions. Treatments were well tolerated. Due to the controlled study design, a spontaneous remission was unlikely.ConclusionWe conclude that FP may be a potentially efficacious therapeutic approach and should be considered in managing generalized GA. Lesers Surg. Med. 40:319–322, 2008. © 2008 Wiley‐Liss, Inc.
Spatial variations of sensible heat flux over an urban area measured using Doppler lidar
Authors: Davis J. C. , Collier C. G. , Davies F. , Bozier K. E. 
Published: June 2008

AbstractThe terrain and morphology of an urban area have a major impact upon the distribution of sensible heat flux and consequently the energy balance of the boundary layer. The spatial distribution of sensible heat flux is difficult to measure, particularly in cities. In this article the potential of a scanning Doppler lidar to make these measurements is explored. The measurements of sensible heat flux are interpreted using a simple trajectory model and an energy balance model. The lidar does seem to offer a practical measurement technique, although the system employed in this study does not have sufficient resolution to provide detailed values over small areas. Copyright © 2008 Royal Meteorological Society
The 3‐D bifurcation and limit cycles in a food‐chain model
Authors: Zhu Lemin , Huang Xuncheng 
Published: June 2008

AbstractIn this paper, by using a corollary to the center manifold theorem, we show that the 3‐D food‐chain model studied by many authors undergoes a 3‐D Hopf bifurcation, and then we obtain the existence of limit cycles for the 3‐D differential system. The methods used here can be extended to many other 3‐D differential equation models. Copyright © 2008 John Wiley & Sons, Ltd.
Erratum: Design and implementation of capacitive coupled‐line structure bandstop filters
Authors: Her Man‐Long , Hsu Ming‐Wei , Ko Wen , Wang Yu‐Lin , Wang Kuo‐Ming , Wang Chia‐An , Hsu Chou‐Jung 
Published: June 2008

AbstractOriginally published Microwave Opt Technol Lett 50: 1363–1368, 2008. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2480, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23625
Erratum: Photorefractive properties of double‐doped HF:CE:LINBO3 crystals
Authors: Zhou Wei , Wang Biao , Yuan Wei , Ling Furi , Ma Decai , Ne Yiran 
Published: June 2008

AbstractOriginally published Microwave Opt Technol Lett 50: 1693–1695, 2008. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2481, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23626
Multiplexing of fiber Bragg grating pairs for sensing based on optical low coherence technology
Authors: Liu Weisheng , Guan Zuguang 
Published: June 2008

AbstractA new multiplexing scheme of fiber Bragg gratings (FBGs) sensing system is presented. Each sensing element is a pair of identical FBGs, with one working as sensing FBG and the other working as a reference. Multiplexing of the FBG pairs is achieved based on optical low coherence technology. A measurement of strain is demonstrated to verify good performance of the system. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2437–2439, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23628
An alternative analytical reduction scheme in the time‐domain layered finite element reduction recovery method for high‐frequency IC design
Authors: Gan Houle , Jiao Dan 
Published: June 2008

AbstractAn alternative analytical reduction scheme was proposed in the time‐domain layered finite element reduction recovery (LAFE‐RR) method for the analysis of high‐frequency integrated circuits. This alternative reduction scheme permits the use of general absorbing boundary conditions in the framework of a time‐domain LAFE‐RR method. In addition, it allows for an application of the LAFE‐RR method to circuit problems in which the system matrices in multiple regions need to be reduced separately. Numerical and experimental results are given to demonstrate its validity. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2337–2341, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23630
Input impedance calculation of dipole antenna using FDTD method
Authors: Yu Wenhua , Yang Xiaoling , Liu Yongjun , Mittra Raj , Lu Yongquan , Wang Pai , Che Qing , Lu Rui 
Published: June 2008

AbstractSince the input impedance of half wavelength dipole antenna is well known, therefore, a dipole antenna is frequently used to validate the computational electromagnetic method. Though its structure is relatively simple, it is not a simple problem for the most computational electromagnetic methods. In this article, we investigate the input impedance of half wavelength dipole antenna using the FDTD method. Numerical experiments have demonstrated that the FDTD method can be used to accurately calculate its input impedance using uniform mesh, nonuniform mesh, or subgridding. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2335–2337, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23631
Modified rectangular monopole antenna having frequency band‐notch function for UWB applications
Authors: Song Yue , Jiao Yong‐Chang , Zhang Fu‐Shun , Zhang Li , Zhao Hui , Weng Zi‐Bin 
Published: June 2008

AbstractA novel modified rectangular monopole antenna having frequency band‐notch function for UWB applications is proposed. To increase the impedance bandwidth, a meandered strip and a parasitical stub are used. By a small patch connected between the modified rectangular patch and a parasitical stub, a frequency‐notched response at 5.8 GHz is obtained. The designed antenna satisfies the voltage standing wave ratio requirement of less than 2.0 in the frequency band between 3 and 13 GHz while showing the band rejection performance in the frequency band of 4.9–6.2 GHz. Simulations and measurements are presented for the proposed antenna. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2309–2311, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23632
Circular polarization square‐slot antenna for dual‐band operation
Authors: Tseng Lin‐Yu , Han Tuan‐Yung 
Published: June 2008

AbstractThe design of a printed slot antenna with dual‐band circular polarization (CP) characteristic is presented. The proposed antenna is excited by an L‐shaped strip with a taper end, connected in series to a microstrip‐line‐fed located along the diagonal line of the square‐slot. Wide impedance and 3 dB axial‐ratio bandwidth (CP bandwidth) are measured and the proposed design is suitable for 802.11 a/b/g and WCDMA operations. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2307–2309, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23633
Millimeter‐wave ultra‐wideband bandpass filter based on liquid crystal polymer substrates for automotive radar systems
Authors: Zhang Xia , Liu Johan , Cai Peng , Kärnfelt Camilla , Wang Xu , Ma Shiwei , Morris James , Zirath Herbert 
Published: June 2008

AbstractA novel and compact millimeter‐wave microstrip ultra‐wideband bandpass filter working over 22–29‐GHz band based on liquid crystal polymer substrates for automotive radar systems is developed for the first time in this article. By using a dual‐mode ring resonator and novel parallel‐coupled input/output feed structure, an ultra‐wideband bandpass filter is realized. After optimization of the design and process, the filter is fabricated on liquid crystal polymer substrates using standard processing technology. Simulations and measurements are compared and discussed. The fabricated filter exhibits a return loss lever better than 20 dB, an insertion loss of 8 dB, and a 3‐dB bandwidth of 25%, which agreed well with simulated results. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2276–2280, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23634
Effect of an enlarged substrate on performance of a partially reflective antenna
Authors: Chang The Nan , Chiou Yi‐Shin 
Published: June 2008

AbstractConventionally, partially reflective surface antenna contains a highly reflective sheet. It is usually constructed by closely spaced metal elements and its size is equal to that of the supported substrate. In this letter, size of the dielectric material is made larger than that of the reflective sheet. We found that the enlarged surrounding dielectric rim can increase the antenna efficiency. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2275–2276, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23635
Printed monopole slot antenna for penta‐band operation in the folder‐type mobile phone
Authors: Lin Chun‐I , Wong Kin‐Lu 
Published: June 2008

AbstractA monopole slot antenna suitable for folder‐type mobile phone application is presented. The antenna is placed at the hinge position of the mobile phone and occupies a small area of 15 × 40 mm2on the top portion of the main circuit board of the mobile phone. The antenna can generate two wide operating bands to cover GSM850/900/1800/1900/UMTS penta‐band operation for the mobile phone in either the open state (talk condition) or close state (standby condition), although the two states have different ground plane conditions for the antenna. This behavior is achieved by connecting the upper ground of the folder‐type mobile phone to its main ground on the main circuit board not at the hinge position but at about the center of the side edge of the main ground where the excited surface current distributions are small. This greatly reduces the effects of the different orientations of the upper ground to the main ground on the antenna performances in the open and close states. Good radiation characteristics of the antenna over the operating bands are also obtained. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2237–2242, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23636
Low‐sidelobe circular‐polarized microstrip array for 2.45 GHz RFID readers
Authors: Sun Zhu , Zhong Shun‐Shi , Tang Xiao‐Rong , Chen Kuang‐Da 
Published: June 2008

AbstractA microstrip antenna array with a low sidelobe level and circular polarization for the 2.45 GHz RFID reader application is introduced. The measured results show that the array achieves a sidelobe level of −26 dB, the axial ratio of under 3 dB within main lobe, a VSWR ≤2 impedance bandwidth of 62 MHz (2.420–2.482 GHz). © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2235–2237, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23637
A low‐loss ring UWB bandpass filter
Authors: Weng Min‐Hang , Liu Shih‐Kun , Liu Yi‐Ting , Hung Cheng‐Yuan 
Published: June 2008

AbstractIn this article, a compact and low loss ring ultra‐wideband (UWB) bandpass filter (BPF) with an enlarged perturbation element is designed and implemented on FR4 substrate. This filter at center frequency f0 of 4.16 GHz has presented almost very good measured characteristics including the bandwidth of 3.04–5.27 GHz (3‐dB fractional bandwidth of 54%), a low insertion loss of 0.8 dB, a high passband selectivity due to two transmission zeros in the passband edges, and a low group delay varied between 0.1 and 0.6 ns. Experimental results of the fabricated filter show a good agreement with the predict results. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2317–2319, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23639
Electrically long rectangular patch antenna fed by meandering probe with wideband and high gain characteristics
Authors: Lai Hau Wah , Luk Kwai Man 
Published: June 2008

AbstractA linearly polarized electrically long rectangular patch antenna fed by a meandering probe is presented. By increasing the width of a patch antenna to 1.05λ0, the gain of the antenna can be increased. The antenna has an impedance bandwidth of 26% (SWR < 1.5), a gain of 11.2 dBi, and a crosspolarized level less than −15 dB across the operating bandwidth. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2289–2292, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23640
Comparison of wideband Gilbert micromixers using SiGe HBT and GaInP/GaAs HBT technologies
Authors: Syu Jin‐Siang , Meng Chinchun , Wu Chih‐Kai , Huang Guo‐Wei 
Published: June 2008

AbstractWideband downconversion mixers are demonstrated by using both 0.35‐μm SiGe heterojunction bipolar transistor (HBT) and 2‐μm GaInP/GaAs HBT technologies. A micromixer topology is implemented in the RF port while a differential type shunt–shunt feedback amplifier and a differential‐to‐single CE‐CC output buffer are used in the IF stage. The frequency response analysis and systematic measurement approach for a wideband Gilbert mixer are proposed in this article for each individual stage of local frequency (LO), radio frequency (RF), and intermediate frequency (IF). The differential LO signals are generated by several off‐chip 180° hybrids to cover more than 8:1 bandwidth. The SiGe HBT Micromixer achieves the conversion gain of 6 dB, IP1dBof −17.5 dBm, and IIP3of −7 dBm with the 3.3‐V supply voltage and the power consumption of 37.5 mW. On the other hand, the GaInP/GaAs HBT Micromixer achieves the conversion gain of 25 dB, IP1dBof −25 dBm, and IIP3of −15 dBm with the 5‐V supply voltage and the power consumption of 50 mW. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2254–2257, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23642
Size reduction of microwave and millimeter‐wave passive circuits by UC‐PBG in standard 0.18‐μm CMOS technology
Authors: Lin Shuiyang , Yang Liwu , Sun Xiaowei 
Published: June 2008

AbstractSize reduction of microwave and millimeter‐wave (mm‐wave) passive circuits incorporating a defective uniplanar compact photonic bandgap (UC‐PBG) slow‐wave structure is investigated. Benefited from the multilayer mental technology of the standard 0.18‐μm CMOS process, thin film microstrip structure is properly constructed on the lossy silicon substrate to reduce substrate loss. Defected periodic patterns on the ground plane are used to contribute to an enhancement of the effective dielectric constant and the slow‐wave factor is 14% increased by the use of UC‐PBG ground. Microwave and mm‐wave passive circuits including resonator and filter are designed and fabricated. Measured results show that the use of UC‐PBG ground has induced a frequency drop of 14% and validate the size reduction concept by using UC‐PBG. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2251–2254, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23643
Simultaneous measurement of temperature and strain based on ARC‐induced long‐period fiber gratings. A case study
Authors: Rego G. 
Published: June 2008

AbstractWe present a potential sensor head for the simultaneous measurement of temperature and strain based on the concatenation of two long‐period fiber gratings arc‐induced in different fibers. Despite being the temperature and strain sensitivities of the individual gratings well defined, we demonstrate that the sensor cannot perform the simultaneous measurement of those physical parameters. This fact, results from the uncertainty in finding the determinant of the inverse matrix. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2472–2474, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23644
Post‐CMOS micromachined nickel tunable‐capacitors with a large tuning‐range under low actuating voltage
Authors: Gu Lei , Wu Zhengzheng , Li Xinxin 
Published: June 2008

AbstractA novel metal micromachining technique is presented, with which both area‐tuning and gap‐tuning variable capacitors are designed and fabricated. Mainly comprising nickel electroplating and gaseous isotropic etching, the developed micromachining technique can be processed in low resistivity silicon substrate under low temperature (max. 120°C). Thus, the micromachined tunable‐capacitors can be on‐chip integrated into RF (radio‐frequency) ICs by means of post‐CMOS compatibly process. The fabricated tunable‐capacitors are measured, generally resulting in a larger tuning‐range than 200% (namely 3:1) under 4‐V actuation voltage. The Q‐factor for the area‐tuning capacitor (C0= 0.28 pF) is measured as 169 at 1 GHz and 46 at 2 GHz, respectively, while the gap‐tuning style capacitor (C0= 0.37 pF) is with the Q measured as 87 at 1 GHz and 35 at 2 GHz. With the successful application in the tunable‐capacitors, the developed post‐CMOS compatible metal micromachining techniques are promising for high‐performance on‐chip RF/microwave passives. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2469–2472, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23645
Integrating a dual‐band filter into the dual‐band VCO module to achieve harmonic suppression
Authors: Tang Ching‐Wen , Chu Wei‐Hsien 
Published: June 2008

AbstractA dual‐band voltage‐controlled oscillator (VCO) module is proposed by integrating a novel dual‐band filter with a dual‐band VCO. The resonator designed with the LC‐tuned concept in the VCO is capable of switching between two frequency bands. Moreover, the dual‐band filter designed with multilayered structure is adopted to achieve harmonic suppression. As a result, the developed VCO module has the capability of harmonic suppression more than 38.61 dB for the measurement upon to two designed frequency bands. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2440–2442, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23647
Tunable coherent photonic microwave notch filter based on PSFBG with optical phase shifter
Authors: Keun Oh Choong , Hanawa Masanori , Kim Tae‐Young , Yun Chun Young , Park Chang‐Soo 
Published: June 2008

AbstractA tunable coherent photonic microwave notch filter based on phase‐shifted fiber Bragg grating is proposed. Because of the Yb3+/Al3+ codoped optical fiber between two sub‐FBGs, the optical phase of the delayed signal is linearly and precisely controlled by adjusting the injected pump power at around 980 nm. By changing the optical phase shift inside the filter, notch frequency can be varied continuously keeping its free spectral range. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2409–2411, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23648