bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multivariate logistic regression analysis for prediction of clinically relevant pancreatic fistula in the early phase after pancreaticoduodenectomy
Authors: Kosaka Hisashi , Kuroda Nobukazu , Suzumura Kazuhiro , Asano Yasukane , Okada Toshihiro , Fujimoto Jiro 
Published: June 2013

AbstractBackgroundPostoperative pancreatic fistula (PF) remains a major complication after pancreaticoduodenectomy (PD). We aimed to investigate the predictors of clinically relevant PF after PD.MethodsWe retrospectively analyzed the predictive factors of relevant grade B/C PF using logistic regression analysis of 100 consecutive patients who underwent PD. PF was defined in accordance with the International Study Group on PF (ISGPF).ResultsWhite blood cell count (WBC) of 73.6 × 102/μl, C‐reactive protein (CRP) of 9.3 mg/dl and amylase value in drains (d‐amylase) of 647 U/I on postoperative day (POD) 4 were proposed as the cut‐off values for predicting grade B/C PF with high accuracy by the receiver operating characteristic (ROC) curve. Multivariate logistic regression analysis revealed that the three factors as significant predictive factors and the predicted probability of detecting grade B/C PF was calculated by the following formula; P = 1/[1 + exp{‐(2.033 × WBC+3.269 × CRP+2.698 × d‐amylase‐4.122)}]. P > 0.5 indicates the prospective incidence of the PF. When the cut‐off values of the three significant predictors were substituted into the formula, P always showed above 0.5 if more than two predictors were above their cut‐off values, indicating a high probability of grade B/C PF.ConclusionsWhite blood cell count, CRP and d‐amylase on POD4 were predictive factors for clinically relevant PF after PD. These findings indicate that our formula is useful for management of drain after PD.
Evaluation of continence following 532 nm laser prostatectomy for patients previously treated with radiation therapy or brachytherapy
Authors: No David , Osterberg E. Charles , Otto Brandon , Naftali Izolda , Choi Benjamin 
Published: June 2013

AbstractIntroduction/ObjectiveUrinary complications such as bladder outlet obstruction or urinary retention following radiation therapy or brachytherapy have been reported in up to 15% of men. When conservative therapy has failed, surgical intervention with transurethral resection of the prostate (TURP) may be performed, but carries a significant risk of incontinence, ranging from 18% to 70% in reported literature. We reviewed a cohort of men previously treated with radiation or brachytherapy, who underwent laser prostatectomy.MethodsFrom February 2004 to October 2011, 12 patients (Six = brachytherapy and Six = external beam radiation) underwent 532 nm GreenLight™ laser prostatectomy by a single surgeon (BBC) for chronic retention or debilitating obstructive symptoms. Preoperative, intraoperative, and postoperative parameters were collected prospectively and reviewed retrospectively. Statistical analysis was performed with a Wilcox Rank sum test with significance defined as P < 0.05.ResultsThe median patient age was 77.4 (Interquartile range (IQR) 73.9, 79.1). Prior to surgery, five patients were catheter dependent. Intraopertively, the median operative time was 48 minutes (IQR 35, 67); median lasing time was 28 minutes (IQR 23, 44); median Joules used was 126,873 (IQR 95,030, 222,336) J. Postoperative median follow up was 22.9 (IQR 13.4, 41.7) months. Significant improvements were noted in IPSS, QoL scores, PVR, and Qmax after PVP treatment. At 12 months, the median decrease in IPSS, QoL scores, and PVR was 15 (IQR 14.5, 22) to 10 (IQR 5.5, 13.5), 5 (IQR 3.5, 5) to 2 (IQR 1, 3.5), 200 (IQR 171, 327.5) to 5 (IQR 1.25, 8), respectively (P < 0.05 for all). Similarly, at 12 months, the median increase in Qmax (ml/second) was 4 (IQR 3, 10) to 15.9 (IQR 11, 16) (P = 0.04). There were no reportable complications at 12 months. None of the 12 patients that underwent 532 nm GreenLight™ laser prostatectomy developed stress urinary incontinence. One patient developed metastatic prostate cancer and the remaining patients had no evidence of biochemical recurrence.ConclusionIn this pilot study, 532 nm GreenLight™ laser prostatectomy is feasible and safe in patients who have undergone prior radiotherapy for prostate cancer. Laser prostatectomy provides a durable response while maintaining continence in this cohort suffering from severe lower urinary tract symptoms (LUTS) or retention. Larger, randomized trials comparing GreenLight™ laser prostatectomy to traditional TURP are necessary to confirm non‐inferiority. Lasers Surg. Med. 45:358–361, 2013. © 2013 Wiley Periodicals, Inc.
Method of Tapered Resistive Sheet Loading for Controlling Edge Scattering
Authors: Chen Hai‐Yan , Xie Jian‐Liang , Zhu Zhi‐Wei , Deng Long‐Jiang 
Published: June 2013

ABSTRACTIn this work, the design of tapered resistive sheet realized by geometric variation based on frequency‐selective surfaces concepts is demonstrated having good suppression of edge scattering from a triangular metallic plate. Electromagnetic back‐scattering of the as‐prepared target from a triangular plate with edge tapered resistive sheet loading is proposed for both horizontal polarization and vertical polarization, and compared with that from the one of the same shape but loaded with constant or none resistive sheet on the edge. Experimental results are presented and compared to numerical simulations, and they demonstrated that the proposed tapered resistive sheet loading advances excellent suppression of edge scattering and the wide angular radar cross section reduction of the target further than the other designs. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1992–1996, 2013
Decomposition, Response Surface Approximations, and Space Mapping for EM‐Driven Design of Microwave Filters
Authors: Koziel Slawomir , Ogurtsov Stanislav 
Published: June 2013

ABSTRACTLow‐cost methodology for modeling and design optimization of electromagnetically simulated filters is presented. The proposed approach consists of the following steps: (i) decomposition of the structure under design, (ii) construction of response surface approximation models of the decomposed parts, and (iii) combining those models into a fast surrogate representing the original structure with good accuracy. In case the electromagnetic (EM) coupling between the parts cannot be neglected, an optional space mapping correction is applied to the surrogate in order to align it with the high‐fidelity EM model. Decomposition allows us to greatly reduce the computational cost of creating the surrogate as the simulation time of the parts of the structure is considerably lower than that of the entire structure. Most importantly it alleviates the curse of dimensionality while sampling the design space, which is because decomposed parts of the original structure are described using only a few parameters (usually, two to four), whereas the entire set of designable parameters may be much larger. Two examples of microstrip filters are presented to demonstrate our approach. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2137–2141, 2013
Effect of Integrated DGS Filters on Small Slotted Round Microstrip Antenna
Authors: Oukil Sofiane , Azrar Arab , Kimouche Hocine , Aksas Rabia 
Published: June 2013

ABSTRACTIn this work, the effect of adding a dumb‐bell–shaped defected ground structure is used to suppress higher order harmonics of a small slotted patch antenna. This work is further extended to integrate a band pass filter (double‐rejection bands) that simultaneously allows a central frequency and eliminates the lower and the outer frequencies. This is achieved by cascading the rectangular and the U‐shaped slots in the ground plane. Measurement results on prototype antennas fully demonstrate the validity of the obtained structures. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1981–1987, 2013
Dual Wideband CPW‐Fed Monopole Antenna with Split‐Ring Resonators
Authors: Basaran Siddik Cumhur , Sertel Kubilay 
Published: June 2013

ABSTRACTWe present a dual‐wideband monopole antenna for WLAN applications. The antenna is fed by a coplanar waveguide transmission line and consists of a concentric split‐ring structure as the radiating element. Measured results show that the proposed design exhibits an impedance bandwidth covering 2.40−2.68 GHz and 3.85−6.95 GHz. In addition, the antenna pattern is well‐behaved in both E‐ and H‐planes. Comparison of simulated and measured results of return losses, radiation patterns, and gains of the antenna are provided. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2088–2092, 2013
High‐Performance W‐Band Mhemt Low Noise Amplifier using Millimeter‐Wave Tuner System
Authors: An Dan , Rhee Jin‐Koo 
Published: June 2013

ABSTRACTIn this article, we report a high‐performance W‐band metamorphic high electron‐mobility transistor (MHEMT) low noise amplifier (LNA) using millimeter‐wave tuner system. The MHEMT devices for millimeter‐wave monolithic integrated circuit LNA exhibited the current gain cutoff frequency (fT) and maximum oscillation frequency (fmax) were 195 and 305 GHz, respectively. The accurate noise parameter was extracted using millimeter‐wave tuner system to design the W‐band LNA. The fabricated W‐band LNA represented S21 gain of 7.42 dB at 94 GHz and noise figure of 2.8 dB at 94.2 GHz. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2157–2160, 2013
A Full X‐Band Power Amplifier with an Integrated Guanella‐Type Transformer and a Predistortion Linearizer In 0.18‐µM CMOS
Authors: Chung Hua‐Yen , Kuo Chin‐Wei , Chiou Hwann‐Kaeo 
Published: June 2013

ABSTRACTA full X‐band push‐pull power amplifier (PA) with predistortion linearizer is developed in tsmcTM 0.18‐µm CMOS technology. The broadband performance is achieved by using transformers including a differential Guanella‐type transmission line transformer and two magnetically coupled transformers. The linearity of PA is enhanced by feedback topology and the use of predistortion linearizer. Over full X‐band from 8 to 12 GHz, the saturated power and maximum power‐added efficiency are higher than 21.3 dBm and 16.19%, respectively. The performances of output power at 1‐dB compression point and power‐added efficiency (PAE) at P1dB are significantly improved by an output power of 2.2 dBm and a PAE of 12.1%, which contributes to power back‐off operation for the application of linear modulation. The chip area, including pads, is 1.05 mm2. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2229–2232, 2013
Pore‐scale modeling of fluid‐particles interaction and emerging poromechanical effects
Authors: Catalano E. , Chareyre B. , Barthélémy E. 
Published: June 2013

SUMMARYA micro‐hydromechanical model for granular materials is presented. It combines the discrete element method for the modeling of the solid phase and a pore‐scale finite volume formulation for the flow of an incompressible pore fluid. The coupling equations are derived and contrasted against the equations of conventional poroelasticity. An analogy is found between the discrete element method pore‐scale finite volume coupling and Biot's theory in the limit case of incompressible phases. The simulation of an oedometer test validates the coupling scheme and demonstrates the ability of the model to capture strong poromechanical effects. A detailed analysis of microscale strain and stress confirms the analogy with poroelasticity. An immersed deposition problem is finally simulated and shows the potential of the method to handle phase transitions. Copyright © 2013 John Wiley & Sons, Ltd.
A fast convergent iterative solver for approximate inverse of matrices
Authors: Soleymani F. 
Published: June 2013

SUMMARYIn this paper, a rapid iterative algorithm is proposed to find robust approximations for the inverse of nonsingular matrices. The analysis of convergence reveals that this high‐order method possesses eighth‐order convergence. The interesting point is that, this rate is attained using less number of matrix‐by‐matrix multiplications in contrast to the existing methods of the same type in the literature. The extension of the method for finding Moore–Penrose inverse of singular or rectangular matrices is also presented. Numerical comparisons will be given to show the applicability, stability and consistency of the new scheme by paying special attention on the computational time. Copyright © 2013 John Wiley & Sons, Ltd.
Air temperature optimisation for humidity‐controlled cold storage of the predatory mites Neoseiulus californicus and Phytoseiulus persimilis (Acari: Phytoseiidae)
Authors: Ghazy Noureldin Abuelfadl , Suzuki Takeshi , Amano Hiroshi , Ohyama Katsumi 
Published: June 2013

AbstractBACKGROUNDHumidity‐controlled cold storage, in which the water vapour pressure is saturated, can prolong the survival of the predatory mites Neoseiulus californicus (McGregor) and Phytoseiulus persimilis Athias‐Henriot (Acari: Phytoseiidae). However, information on the optimum air temperature for long‐term storage by this method is limited. The authors evaluated the survival of mated adult females of N. californicus and P. persimilis at 5.0, 7.5, 10.0 and 12.5 °C under saturated water vapour condition (vapour pressure deficit 0.0 kPa).RESULTSN. californicus showed a longer survival time than P. persimilis at all the air temperatures. The longest mean survival time of N. californicus was 11 weeks at 7.5 °C, whereas that of P. persimilis was 8 weeks at 5.0 °C. After storage at 7.5 °C for 8 weeks, no negative effect on post‐storage oviposition was observed in N. californicus, whereas the oviposition of P. persimilis stored at 5.0 °C for 8 weeks was significantly reduced.CONCLUSIONThe interspecific variation in the response of these predators to low air temperature might be attributed to their natural habitat and energy requirements. These results may be useful for the long‐term storage of these predators, which is required for cost‐effective biological control. © 2013 Society of Chemical Industry
Long paths and cycles in random subgraphs of graphs with large minimum degree
Authors: Krivelevich Michael , Lee Choongbum , Sudakov Benny 
Published: June 2013

AbstractFor a given finite graph G of minimum degree at least k, let Gp be a random subgraph of G obtained by taking each edge independently with probability p. We prove that (i) if for a function that tends to infinity as k does, then Gp asymptotically almost surely contains a cycle (and thus a path) of length at least , and (ii) if , then Gp asymptotically almost surely contains a path of length at least k. Our theorems extend classical results on paths and cycles in the binomial random graph, obtained by taking G to be the complete graph on k + 1 vertices. © Wiley Periodicals, Inc. Random Struct. Alg., 46, 320–345, 2015
Research to regulation: Cougar social behavior as a guide for management
Authors: Beausoleil Richard A. , Koehler Gary M. , Maletzke Benjamin T. , Kertson Brian N. , Wielgus Robert B. 
Published: June 2013

ABSTRACTCougar (Puma concolor) populations are a challenge to estimate because of low densities and the difficulty marking and monitoring individuals. As a result, their management is often based on imperfect data. Current strategies rely on a source–sink concept, which tends to result in spatially clumped harvest within management zones that are typically approximately 10,000 km2. Agencies often implement quotas within these zones and designate management objectives to reduce or maintain cougar populations. We propose an approach for cougar management founded on their behavior and social organization, designed to maintain an older age structure that should promote population stability. To achieve these objectives, hunter harvest would be administered within zones approximately 1,000 km2 in size to distribute harvest more evenly across the landscape. We also propose replacing the term “quota” with “harvest threshold” because quotas often connote a harvest target or goal rather than a threshold not to exceed. In Washington, USA, where the source–sink concept is implemented, research shows that high harvest rates may not accomplish the intended population reduction objectives due to immigration, resulting in an altered population age structure and social organization. We recommend a harvest strategy based on a population growth rate of 14% and a resident adult density of 1.7 cougars/100 km2 that represent probable average values for western populations of cougars. Our proposal offers managers an opportunity to preserve behavioral and demographic attributes of cougar populations, provide recreational harvest, and accomplish a variety of management objectives. We believe this science‐based approach to cougar management is easy to implement, incurs few if any added costs, satisfies agency and stakeholder interests, assures professional credibility, and may be applied throughout their range in western North America. © 2013 The Wildlife Society.
Reduction in Bone Volume Resection with a Newer Posterior Stabilized Total Knee Arthroplasty Design
Authors: Pugh Luke , Ruel Allison , Lipman Joseph , Wright Timothy , Gessell Mark , Westrich Geoffrey 
Published: June 2013

Background Posterior stabilized total knee arthroplasty requires an intercondylar notch to accommodate the cam housing that articulates with the tibial post to create femoral rollback required for deep flexion. The volume of bone resected for the intercondylar notch varies with implant design, and newer designs may accommodate high flexion with less bone resection. Questions/Purposes This study aims to analyze the bone volume and density resected from the intercondylar notch for three posterior stabilized implants from a single company: a Posterior Stabilized (PS) system, a Hi-Flex system (HF), and a rounded new box-reamer (RB) system and to further assess whether the newer RB with a cylindrical cutting tool would preserve more native bone. Materials and Methods Using a computer model, the PS, HF, and RB femoral components were digitally implanted into CT scans of 19 cadaver femurs. Nine cadavers were fit with a size 4 implant, six with size 3, and four with a size 2. The volume of intercondylar bone resected digitally for femoral preparation was measured. Bone density was measured by CT scans in Hounsfield units (HU). A paired t test was used to compare the mean volume of bone resected for each implant. Results For the size 4 femurs, the newer RB design removed 8% less intercondylar bone than the PS design (7,832 ± 501 vs. 8,547 ± 377 mm3, p < 0.001) and 28% less bone than the HF design (7,832 ± 501 vs. 10,897 ± 444 mm3, p < 0.001). The average HU for size 4 femurs for RB design was 427 ± 72 (PS = 399 ± 69, p < 0.001; HF = 379 ± 66, p < 0.001). For the size 3 femurs, the RB design removed 12% less intercondylar bone than the PS (6,664 ± 786 vs. 7,516 ± 648 mm3, p < 0.001) and 27% less bone than the HF (6,664 ± 786 vs. 9,078 ± 713 mm3, p < 0.001). HU for size 3 femurs for the RB design was 452 ± 70 (PS = 422 ± 53, p < 0.1; HF = 410 ± 59, p < 0.01). For the size 2 femurs, the RB design removed 5% less intercondylar bone than the PS (5,730 ± 552 vs. 6,009 ± 472 mm3, p < 0.01) and 22% less bone than the HF (5,730 ± 552 vs. 7,380 ± 532 mm3, p < 0.001). HU for size 2 femurs for the RB design was 430 ± 48 (PS = 408 ± 55, p < 0.01; HF = 385 ± 56, p < 0.01). Conclusions The newer RB design removes less bone from the intercondylar notch than the classic PS and HF designs in all sizes tested. The bone-conserving cuts incorporated into this newer implant design appear to preserve native bone without compromising design objectives.
Outcome of Total Knee Arthroplasty after High Tibial Osteotomy: Does Malalignment Jeopardize the Results when Using a Posterior-Stabilized Arthroplasty?
Authors: Hernigou Philippe , Duffiet Pascal , Julian Didier , Guissou Issac , Poignard Alexandre , Flouzat-Lachaniette Charles Henri 
Published: June 2013

Background The controversy regarding the outcome of total knee arthroplasties after high tibial osteotomy may relate to malalignment secondary to overcorrection after high tibial osteotomy (HTO) [ 1 , 2 ] and to the type of arthroplasty itself (posterior-stabilized arthroplasty or posterior cruciate ligament-retaining prosthesis). Questions/Purpose We asked two questions: (1) Would a posterior-stabilized arthroplasty provide sufficient constrain and improve pain and function in patients with severe malalignment due to a previous HTO? (2) Will malalignment of the previous HTO jeopardize the long-term results of a total knee reconstruction with a posterior-stabilized implant? Patients and Methods We retrospectively reviewed 25 posterior-stabilized TKAs in 25 patients with severe valgus deformity after HTO (ranging from 10° to 20° of valgus) and compared the results with a series of matched 25 posterior-stabilized TKAs in 25 patients with normocorrection after HTO ranging from 5° of valgus to 5° of varus. Clinical, operative, and radiographic data were reviewed. Minimum follow-up was 10 years after the arthroplasty (average, 15 years; range, 10–20 years). Results All the knees had standard posterior-stabilized total knee arthroplasty implants. Patients with an overcorrected HTO were more likely to require a soft tissue release to balance the knee. However, Average Knee Society and Function Score improved, respectively, from 48 to 85 and from 50 to 90 points in the severely overcorrected group, versus, respectively, 50 to 89 and 52 to 97 in the normocorrected group, but the range of mobility was superior for patients with normal alignment. Fifteen-year survivorship after the arthroplasty comparison showed no significant difference between the two groups (one revision in each group). Conclusions Patients with an overcorrected HTO are more likely to require a soft tissue release to balance the knee. However, both groups show improvements in function and pain. With a posterior-stabilized arthroplasty, the degree of deformity has no impact on the longevity of the TKA.
α-Tanycytes of the adult hypothalamic third ventricle include distinct populations of FGF-responsive neural progenitors
Authors: Robins S.C. , Stewart I. , McNay D.E. , Taylor V. , Giachino C. , Goetz M. , Ninkovic J. , Briancon N. , Maratos-Flier E. , Flier J.S. , Kokoeva M.V. , Placzek M. 
Published: June 2013

AbstractEmerging evidence suggests that new cells, including neurons, can be generated within the adult hypothalamus, suggesting the existence of a local neural stem/progenitor cell niche. Here, we identify α-tanycytes as key components of a hypothalamic niche in the adult mouse. Long-term lineage tracingin vivousing aGLAST::CreERT2conditional driver indicates that α-tanycytes are self-renewing cells that constitutively give rise to new tanycytes, astrocytes and sparse numbers of neurons.In vitrostudies demonstrate that α-tanycytes, but not β-tanycytes or parenchymal cells, are neurospherogenic. Distinct subpopulations of α-tanycytes exist, amongst which only GFAP-positive dorsal α2-tanycytes possess stem-like neurospherogenic activity.Fgf-10andFgf-18are expressed specifically within ventral tanycyte subpopulations; α-tanycytes require fibroblast growth factor signalling to maintain their proliferationex vivoand elevated fibroblast growth factor levels lead to enhanced proliferation of α-tanycytesin vivo.Our results suggest that α-tanycytes form the critical component of a hypothalamic stem cell niche, and that local fibroblast growth factor signalling governs their proliferation.