bluuebunny/crossref_metadata_2025_split huggingface dataset:
Incidence and time of intraoperative vascular complications in head and neck microsurgery
Authors: Wolff Klaus‐Dietrich , Hölzle Frank , Wysluch Andreas , Mücke Thomas , Kesting Marco 
Published: February 2008

AbstractVascular occlusion is still the main reason for flap loss and occurs mostly within the first hours after performing anastomoses. Many surgeons still prefer to perform reconstruction and close the defect before starting to anastomose. The aim of this investigation was to find out if detection of early vascular occlusion is facilitated with a prolonged observation period. Between January 2000 and August of 2006, 350 consecutive free flap transfers for reconstruction in maxillofacial surgery were analyzed. In all flaps vascular anastomoses were performed prior to definite flap insertion. The flaps were controlled continuously during soft tissue or bony reconstruction until final wound closure at the neck. Complete operation time, ischemia time of the flap, and time from reperfusion to wound closure (direct pedicle observation time) were registered for each flap. In 350 flaps (138 radial forearm, 94 fibular, 53 ALT, 23 DCIA, 26 soleus perforator, 9 lateral arm, 5 lat. dorsi, and 2 scapular), operation time in average was 8.5 h, ischemia time varied between 78 and 139 min (average 104 min), and direct pedicle observation time of the flaps was 144 min in average (93‐192 min). Four arteries and 2 veins showed immediate failure within 5 min after clamp removal, 10 arteries and 6 veins developed thromboses during the direct pedicle observation time. Out of these 16 vascular complications, 15 developed later than 15 min, 7 of them later than 30 min, and 2 of them later than 45 min. The overall complication rate including secondary revision of the pedicle was 16.8%, and an overall flap survival rate resulted in 95.4%. We conclude that microvascular anastomoses should be controlled for at least 45 min before definite wound closure. By performing anastomoses first and flap insertion second, this can be easily warranted. © 2008 Wiley‐Liss, Inc. Microsurgery, 2008.
Penile replantation, complication management, and technique refinement
Authors: Chou Erh‐Kang , Tai Yu‐Tzu , Wu Chao‐I , Lin Meng‐Shi , Chen Hsin‐Han , Chang Sophia Chia‐Ning 
Published: February 2008

AbstractWe describe a case of complete guillotine‐type penile amputation at the proximal penile shaft. The blood flow was established 10 h after trauma. Circulation in the replanted penis was quite good but there was progressive prepuce necrosis after the hematoma. Cosmetic and urinary outcome was good 6 weeks later. The repair of deep dorsal penile vessels helps in corpus tissue healing and glans circulation. The blood supply from the corpus tissue is sufficient for the survival of the replanted penis even when the repaired dorsal vessels were occluded. Surgical pitfalls in replantation procedures and complication management are discussed. © 2008 Wiley‐Liss, Inc. Microsurgery, 2008.
Hepatic lobectomy and segmentectomy models using microsurgical techniques
Authors: Martins Paulo Ney Aguiar , Neuhaus Peter 
Published: February 2008

AbstractThe mouse and rat models are the most commonly utilized experimental models of partial liver resection. Microscope‐assisted partial hepatectomy is associated with better outcomes by reducing the risk of vena cava stenosis after ligature and injury to other liver pedicles. In addition, microsurgery allows lobectomies and segmentectomies after individual ligation of intrahepatic vascular branches, including the left and right segments of the median lobe, which has not been reported before. Here, we describe a new technique (catheter‐assisted suture technique) and report our experience with partial hepatectomies in rodents using a microsurgical approach. © 2008 Wiley‐Liss, Inc. Microsurgery, 2008.
A singular nonlinear elliptic equation with natural growth in the gradient
Authors: Zhou Wen‐Shu 
Published: February 2008

AbstractThis paper is devoted to the existence and regularity of the homogenous Dirichlet boundary value problem for a singular nonlinear elliptic equation with natural growth in the gradient. By certain transformations, the problem can be transformed formally into either a Dirichlet problem or boundary blowup problems without gradient term, for which the corresponding existence results are also derived, which is a partial extension and supplement to the previous works. Copyright © 2008 John Wiley & Sons, Ltd.
Low phase noise bond wire VCO for DVB‐H
Authors: Kim Ki‐Jin , Ahn K. H. , Lim T. H. 
Published: February 2008

AbstractA low phase noise VCO with bond wire inductor for DVB‐H is implemented in TSMC CMOS 0.18 μm. The bond wire VCO exhibits −137 dBc/Hz at 1 MHz with the 5 mA current consumption. To meet the DVB‐H phase noise requirement, bond wire modeling is introduced in this paper. Due to the bond wire characteristics, Q value of the VCO inductor is more than 25 at 1 GHz. The proposed wire bond inductor provides an additional frequency tuning option after IC fabrication by modifying the length of the wire bond. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 859–863, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23228
Frequency‐shift keying optical code‐division multiple‐access system with novel interference cancellation
Authors: Karbassian M. M. , Ghafouri‐Shiraz H. 
Published: February 2008

AbstractA novel multiple user interference (MUI) cancellation technique is introduced with a reference signal which is data‐free from the intended signal. It also simplifies the receiver architecture in synchronous M‐ary wavelength or frequency shift keying (FSK) OCDMA. In the analysis, the system upper‐bounded bit‐error rate (BER) is derived taking into account the Poisson effect on the I/O characteristics of the photo‐detectors (PD). It is found that the capacity of this system also increases by employing the proposed MUI canceller. In contrast to wavelength‐division multiplexing (WDM), fewer wavelengths are needed as a result of M‐ary source coding. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 883–885, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23233
A new wavelength converter for an optical NRZ data signal using an SOA‐loop‐mirror
Authors: Kim Hae Geun , Lee Hyuek Jae 
Published: February 2008

AbstractA new wavelength conversion method using an SOA‐loop‐mirror for NRZ optical data has been proposed and experimentally demonstrated. A conventional wavelength converter with a nonlinear fiber‐loop‐mirror can perform RZ‐to‐RZ, NRZ‐to‐RZ, or RZ‐to‐NRZ data format conversion, while NRZ‐to‐NRZ conversion has not been demonstrated up to now. We successfully experiment optical wavelength conversion of 1300 nm NRZ data into 1550 nm NRZ data at 1.5 Gbit/s using a fiber‐loop‐mirror with a 1300 nm‐SOA. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 855–859, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23234
Dual‐mode square ring resonators for design of millimeter‐wave ultra‐wideband bandpass filter
Authors: Cai Peng , Ma Zhewang , Guan Xuehui , Zhang Yong , Chen Bin , Xu Bo 
Published: February 2008

AbstractIn this article, a millimeter‐wave ultra‐wideband (UWB) bandpass filter is proposed and implemented by cascading two dual‐mode square ring resonators loaded with λ0/4 and 3λ0/4 open tuning stubs, aiming at transmitting the signals in the UWB passband of 22–29 GHz. Formulae based on even‐ and odd‐mode analysis are derived to facilitate the design of transmission zeros of these ring resonators. Because of the transmission zeros in the lower and upper stopbands, the proposed filter exhibits sharp attenuations near the passband as well as very wide stopband. The measured responses of the filter agree well with the design simulation, and satisfy well the Federal Communications Commission's indoor limit on millimeter‐wave UWB applications over very wide frequency band. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 879–883, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23237
Interpolation/averaging in nonorthogonal FDTD algorithm
Authors: Nilavalan Rajagopal , Craddock Ian J. 
Published: February 2008

AbstractFinite difference time domain (FDTD) method has many applications. This contribution focuses on nonorthogonal FDTD method, which offers an improved geometric flexibility. The effects of the interpolation step in nonorthogonal FDTD on overall accuracy, modeling metallic and dielectric discontinuities, and absorbing boundaries are discussed and the errors are estimated through numerical simulations. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 846–851, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23239
The application of the second‐order accurate FDTD techniques at planar dielectric interface in three‐dimensional case
Authors: Ding Hai , Chu Qing‐Xin 
Published: February 2008

AbstractThe second‐order accurate FDTD equations at planar dielectric interfaces in three‐dimensional case are straightforwardly presented based on the second‐order accurate FDTD techniques in the TEx and TMx polarization modes proposed previously. Numerical experiments are carried out to verify the better accuracy of the method in this article than the conventional FDTD equations. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 871–875, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23245
Design of compact suspended stripline bandpass filters with wide stopband
Authors: Lin Li‐Jing , Ho Min‐Hua , Xu Wei‐Qin 
Published: February 2008

AbstractThe design of compact suspended stripline (SSL) bandpass filters is demonstrated. Equivalent circuit models of lumped elements for the proposed filters are also developed to analyze the circuit behaviors. The SSL filters have achieved the benefits of size compactness, extremely low insertion losses, low dispersion, high operation frequency, and sometimes a wide stopband. Experiments are conducted to validate the SSL filters' performance. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 865–868, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23250
High dielectric constant tape double‐stacked EBG structure for broadband suppression of SSN in LTCC‐based SiP applications
Authors: Park Jongbae , Lu Albert Chee W. , Sunappan Vasudivan , Wai Lai L. , Kim Joungho 
Published: February 2008

AbstractThe advantages of a dielectric loaded double‐stacked electromagnetic bandgap structure with a significantly improved noise isolation bandwidth, fabricated on a low‐temperature co‐fired ceramic multilayer substrate, were experimentally demonstrated in system‐in‐package applications. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 942–944, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23253
New broadband driver for switchmode RF power wideband amplifiers
Authors: Javier Ortega‐Gonzalez Francisco 
Published: February 2008

AbstractThis article shows a new wideband driver for switchmode RF power wideband amplifiers based on the voltage waveforms generated across nonnominal wideband Class‐E amplifier's switch. Their key features are high efficiency, wideband operation, and only positive driving voltage generation. Harmonic balance simulations and measurements on a prototype (B = 40%, POUT = 50 W at 7.5 MHz, ηOV > 90%) show its effectiveness. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 985–988, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23258
CPW‐fed printed monopole antenna with branch slits for WiMAX applications
Authors: Chen Wen‐Shan , Chang Yu‐Chen 
Published: February 2008

AbstractThis study proposes a novel design of printed monopole antenna using branch slits for WiMAX applications. Here, dual‐band‐reject function is used to form triple band for WiMAX operation. We first investigated the printed rectangular monopole antenna for wide‐band operation of 2.5–6 GHz, and the meandered slit strip etched on the wide‐band printed rectangular monopole antenna with a rejected frequency of 2.9–3.1 GHz. Furthermore, we embedded two short slits etched on the signal strip of the 50‐Ω CPW‐fed line, which is approximately quarter wavelength to suppress the band of 3.96–4.9 GHz. This study demonstrates good impedance matching, good radiation patterns, and good band‐rejected performance of the proposed antenna. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 952–954, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23260
A compact and wideband balance‐fed triangular‐monopole antenna for DCS/pPCS/UMTS/WLAN/WiMAX applications
Authors: Chiu Cheng‐Nan , Chen Hung‐Ruei 
Published: February 2008

AbstractA compact and wideband balance‐fed triangular‐monopole antenna is newly proposed in this article for modern wireless applications. This balance‐fed antenna is for microstrip‐feeding with differential signals. The antenna is compact in size and has the attractive merit of insensitivity to the influence of size variation of the feed ground. A prototype of the antenna having adequate bandwidth for the DCS, PCS, UMTS, WLAN, and WiMAX bands was constructed and is shown. The simulated and measured results of its return loss and antenna patterns demonstrate the sufficient impedance‐matching bandwidth and omnidirectional radiation characteristic of the newly developed antenna, together with the attractive merit mentioned earlier. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 971–974, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23266
Subtraction of scattering parameters for adiabatic intrinsic responses of semiconductor lasers
Authors: Zhang S. J. , Zhu N. H. , Liu Y. , Liu Y. Z. 
Published: February 2008

AbstractThermal effects will make chip temperature change with bias current of semiconductor lasers, which results in inaccurate intrinsic response by the conventional subtraction method. In this article, an extended subtraction method of scattering parameters for characterizing adiabatic responses of laser diode is proposed. The pulsed injection operation is used to determine the chip temperature of packaged semiconductor laser, and an optimal injection condition is obtained by investigating the dependence of the lasing wavelength on the width and period of the injection pulse in a relatively wide temperature range. In this case, the scattering parameters of laser diode are measured on adiabatic condition and the adiabatic intrinsic responses of packaged laser diode are first extracted. It is found that the adiabatic intrinsic responses are evidently superior to those without thermal consideration. The analysis results indicate that inclusion of thermal effects is necessary to acquire accurate intrinsic responses of semiconductor lasers. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 992–995, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23278
Divide‐by‐3 LC injection‐locked frequency divider with inductor over MOS topology
Authors: Jang Sheng‐Lyang , Chen Wei‐Chi , Lee Chien‐Feng 
Published: February 2008

AbstractThis letter proposes a divide‐by‐3 frequency divider employing inductor‐over MOS topology to reduce the chip area and chip cost; the divider was fabricated using the 0.35‐μm 2P4M CMOS technology. The divider consists of an nMOS cross‐coupled LC oscillator and two injection MOSFETs in series with the cross‐coupled NMOSFETs, and the LC resonator is composed of two inductors and varactors. At the supply voltage of 1.6 V, the divider free‐running frequency is tunable from 2.17 to 2.43 GHz, and at the incident power of 0 dBm the locking range is about 1.03 GHz (14.9%), from the incident frequency 6.41 to 7.44 GHz. The core power consumption is 15.1 mW. The die area is 0.753 × 0.786 mm2. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 988–992, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23279
Investigations into unit cells offering an increased phasing range for single‐layer printed reflectarrays
Authors: Sayidmarie K. H. , Bialkowski M. E. 
Published: February 2008

AbstractThis paper reports on the investigations into new configurations of unit cells which offer an increased phasing range for a single‐layer printed reflectarray. It is shown that the extended phasing range can be obtained by utilizing similar in shape but different in size resonant elements. Using this principle it is shown that two resonant elements forming a unit cell can double while three elements can almost triple the phasing range of a single resonant element unit cell. These investigations also show that the relative sizes and spacing between the elements in the cell can be adjusted to linearize the phasing curves as a function of the elements dimensions. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1028–1032, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23285
A novel monopole antenna with parallel structure for DVB‐H/SDMB applications
Authors: Jeon Seung‐Gil , Ryu Kwang‐Woo , Choi Jae‐Hoon 
Published: February 2008

AbstractA novel planar monopole antenna with parallel ground structures for dual and wide band properties are proposed. The proposed antenna has two separate 10 dB return loss bandwidths of 423 MHz (about 63% centered at 670 MHz) and 50 MHz (about 3% centered at 1.465 GHz). It shows good impedance and radiation characteristics over the frequency bands (DVB‐H and SDMB) of interest. The simulated and measured return loss results are in good agreement. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1054–1056, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23291
Compact planar antennas with a parasitic shorted‐strip for dual‐band WLAN
Authors: Chae Gyoo‐Soo , Lim Joong‐Soo , Kim Min‐Nyun 
Published: February 2008

AbstractCompact printed antennas with a parasitic folded shorted‐strip for dual‐band WLAN are presented. The proposed antennas are based on the parasitic shorted‐patch structure, which is a popular approach for further bandwidth improvement. According to our simulation results, two prototype antennas are manufactured and measured. The obtained antennas operate in IEEE802.11a/b/g bands (2.4–2.484 GHz and 5.15–5.35 GHz bands) and can be adapted for various portable applications. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1124–1126, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23294
Analysis of highly birefringent photonic crystal fibers with squeezed rectangular lattices
Authors: Franco Marcos A. R. , Barreto Elaine C. S. , Serrão Valdir A. , Sircilli Francisco , Hattori Haroldo T. 
Published: February 2008

AbstractIn this article, we analyze the birefringence of photonic crystal fibers with squeezed rectangular lattices by using finite element method. When the original photonic crystal fiber is squeezed, the lattice is compressed, and the holes become elliptical. This operation leads to birefringences as high as 7.5 × 10−3 at 1550 nm. However, confinement losses and dispersion are also changed after this operation is performed, needing to be reassessed. We estimate the changes in dispersion and confinement losses after this operation is performed. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1083–1086, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23297
Neural network estimation of RF electromagnetic pollution near TV broadcast transmitters
Authors: Çolak İlhami , Koçsalay İlhan 
Published: February 2008

AbstractA set of measurements to investigate the Radio Frequency (RF) electromagnetic pollution in an area surrounding a TV broadcast transmitter has been given. The RF electromagnetic fields at different transmitter output power and time, in and out of the measurement points, were estimated and visualized by the developed visual software, which has 3D screening unit, based on Artificial Neural Network and Grid Data. The software enables users to estimate the RF electromagnetic field distributions in and out of the measurement points. Electric and magnetic field components of RF radiation value at any point/area can be compared with national/international standard limits easily using the software developed. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1004–1010, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23301
Dispersion‐compensating photonic crystal fibers with special characteristics
Authors: Zhang Yejin , Yang Sigang , Xie Shizhong , Zheng Wanghua , Lianghui Chen 
Published: February 2008

AbstractBased on the modified dual core structure, three kinds of special photonic crystal fibers are presented, which are extremely large negative dispersion, super‐broad band, and large area mode field dispersion‐compensating photonic crystal fibers (DCPCF). For extremely large negative dispersion DCPCF, the peak of negative dispersion reaches −5.9 × 104ps/(nm km). Super‐broad band DCPCF has broadband large negative dispersion and the dispersion value varies linearly from −380 ps/(nm km) to −420 ps/(nm km) in the C band. The designed large area mode field DCPCF has a peak dispersion of −1203 ps/(nm km) with the inner core mode area of 47 μm2and outer core mode area of 835 μm2. Furthermore, for the large area mode field DCPCF, the experimental result is also obtained. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1073–1078, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23306
Z‐restored spin‐echo 13C 1D spectrum of straight baseline free of hump, dip and roll
Authors: Xia Youlin , Moran Sean , Nikonowicz Edward P. , Gao Xiaolian 
Published: February 2008

AbstractA pulse sequence of z‐restored spin echo, − π− β− τ− π− τ−, employing a π pulse in the middle of the delay (2τ) to form a spin echo and the two π pulses together to restore the residual longitudinal magnetization back to + z direction, is described. 13C spectra of organic compounds provide a wealth of structural information; however, 13C 1D spectra acquired using reverse geometry probes can have significant baseline humps or rolls because of pulse ring‐down within the coil. The baseline distortions are especially apparent in spectra acquired using cryogenically enhanced probes. The baseline problem may be alleviated by extending the delay between the last pulse and the starting point of acquisition. However, uses of long delay times introduce large negative first‐order phase corrections which themselves produce baseline roll. The prescribed experiment can be used to completely remove the hump, roll or dip in the baseline of the 13C spectrum and at the same time obtain sensitivity similar to the experiment of a single β pulse. We believe that this experiment will be of general applications in acquiring high‐quality 13C NMR data with reverse geometry probes and spectral interpretation. Copyright © 2008 John Wiley & Sons, Ltd.