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Search Results: 1 - 10 of 69333 matches for " Wen-Jer Wu "
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A new Chorizococcus species (Hemiptera: Coccoidea: Pseudococcidae) from Taiwan with transferring Chorizococcus mirzayansi Moghaddam to genus Spilococcus Ferris
Wen-Jer Wu,Ming-Yu Tsai
ZooKeys , 2011, DOI: 10.3897/zookeys.103.1215
Abstract: A new mealybug species, Chorizococcus zoysiae sp. n., feeding on Zoysia tenuifolia (Poaceae), is described from Taiwan. This is the first record of a Chorizococcus species from Southeast Asia. Adult female, third-instar female, second-instar nymph and first-instar nymph were described and illustrated in this article. Keys are provides to (a) separate this new species from similar species of Chorizococcus and those of same genus on zoysiagrasses and (b) to identify instars of this new species. In addition, Ch. mirzayansi Moghaddam is transferred to the genus Spilococcus as S. mirzayansi (Moghaddam) comb. nov.
Exact Solution of a Monomer-Dimer Problem: A Single Boundary Monomer on a Non-Bipartite Lattice
F. Y. Wu,Wen-Jer Tzeng,N. Sh. Izmailian
Mathematics , 2010, DOI: 10.1103/PhysRevE.83.011106
Abstract: We solve the monomer-dimer problem on a non-bipartite lattice, the simple quartic lattice with cylindrical boundary conditions, with a single monomer residing on the boundary. Due to the non-bipartite nature of the lattice, the well-known method of a Temperley bijection of solving single-monomer problems cannot be used. In this paper we derive the solution by mapping the problem onto one on close-packed dimers on a related lattice. Finite-size analysis of the solution is carried out. We find from asymptotic expansions of the free energy that the central charge in the logarithmic conformal field theory assumes the value $c=-2$.
A new horsehair worm, Chordodes formosanus sp. n. (Nematomorpha, Gordiida) from Hierodula mantids of Taiwan and Japan with redescription of a closely related species, Chordodes japonensis
Ming-Chung Chiu,Chin-Gi Huang,Wen-Jer Wu,Shiuh-Feng Shiao
ZooKeys , 2011, DOI: 10.3897/zookeys.160.2290
Abstract: A new species of horsehair worm, Chordodes formosanus sp. n., is described and compared to a closely related species, C. japonensis. Although both species possess the same six cuticular structures of areoles on the surface, the significantly longer filaments on the female crowned areoles can be used as diagnostic characters for the new species. The different taxonomic status of these two species was also confirmed after analyzing the partial cytochrome oxidase subunit I sequence, and the mantid hosts, which are respectively limited to the genus Tenodera for C. japonensis and Hierodula for C. formosanus sp. n. In addition, the immature stages of eggs and larvae of the new species are also described and discussed in detail.
Aseptic Nonunion of a Femoral Shaft Treated Using Exchange Nailing
Chia-Wei Yu,Chi-Chuan Wu,Wen-Jer Chen
Chang Gung Medical Journal , 2002,
Abstract: Background: There are many methods for treating femoral shaft aseptic nonunions ofwhich exchange nailing is the simplest technique. However, the reportedsuccess rate varies. Therefore, a prospective study was conducted to furtherclarify the role of exchange nailing.Methods: From October 1994 through December 1999, 40 femoral shaft asepticnonunions in 39 patients were treated using exchange nailing. The indicationsfor this technique included a femoral shaft aseptic nonunion with a previouslyinserted intramedullary nail, less than 1 cm shortening, a radiolucentline of the nonunion, and no segmental bony defects. The surgical techniqueconsisted of close removal of the previously inserted intramedullary nail,reaming the intramedullary canal as widely as possible (1 or 2 mm oversized),and re-insertion of a stable unlocked or locked intramedullary nail.Results: Thirty-six femoral shaft aseptic nonunions in 35 patients were followed-upfor at least 1 year (median, 2.9 years; range, 1.1~6.0 years) and 33 nonunionshealed. The union rate was 91.7% (33/36) and the union period was median4 months (range, 3~8 months). No major surgical complications were noted.The other three patients with persistent nonunions were continuously followed-up due to their reluctance for further operations.Conclusion: Although exchange nailing is a relatively simple surgical technique, it canstill achieve a high union rate with a low complication rate. Despite that factorsto induce a persistent nonunion are still unclear, clinically, exchangenailing should be used as the first choice in the treatment of an indicatedfemoral shaft aseptic nonunion.
Discovery of Genes Related to Insecticide Resistance in Bactrocera dorsalis by Functional Genomic Analysis of a De Novo Assembled Transcriptome
Ju-Chun Hsu, Ting-Ying Chien, Chia-Cheng Hu, Mei-Ju May Chen, Wen-Jer Wu, Hai-Tung Feng, David S. Haymer, Chien-Yu Chen
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0040950
Abstract: Insecticide resistance has recently become a critical concern for control of many insect pest species. Genome sequencing and global quantization of gene expression through analysis of the transcriptome can provide useful information relevant to this challenging problem. The oriental fruit fly, Bactrocera dorsalis, is one of the world's most destructive agricultural pests, and recently it has been used as a target for studies of genetic mechanisms related to insecticide resistance. However, prior to this study, the molecular data available for this species was largely limited to genes identified through homology. To provide a broader pool of gene sequences of potential interest with regard to insecticide resistance, this study uses whole transcriptome analysis developed through de novo assembly of short reads generated by next-generation sequencing (NGS). The transcriptome of B. dorsalis was initially constructed using Illumina's Solexa sequencing technology. Qualified reads were assembled into contigs and potential splicing variants (isotigs). A total of 29,067 isotigs have putative homologues in the non-redundant (nr) protein database from NCBI, and 11,073 of these correspond to distinct D. melanogaster proteins in the RefSeq database. Approximately 5,546 isotigs contain coding sequences that are at least 80% complete and appear to represent B. dorsalis genes. We observed a strong correlation between the completeness of the assembled sequences and the expression intensity of the transcripts. The assembled sequences were also used to identify large numbers of genes potentially belonging to families related to insecticide resistance. A total of 90 P450-, 42 GST-and 37 COE-related genes, representing three major enzyme families involved in insecticide metabolism and resistance, were identified. In addition, 36 isotigs were discovered to contain target site sequences related to four classes of resistance genes. Identified sequence motifs were also analyzed to characterize putative polypeptide translational products and associate them with specific genes and protein functions.
Synthesis of Fuzzy Control for Inverter Pendulum Robot with H Infinity Performance Constraint
Wen-Jer Chang,Wei-Han Huang,Wei Chang
IAENG International Journal of Computer Science , 2009,
Variance and Passivity Constrained Fuzzy Control for Nonlinear Ship Steering Systems with State Multiplicative Noises
Wen-Jer Chang,Bo-Jyun Huang
Mathematical Problems in Engineering , 2013, DOI: 10.1155/2013/687317
Exact Solution of an One Dimensional Deterministic Sandpile Model
Darwin Chang,Shih-Chang Lee,Wen-Jer Tzeng
Physics , 1995, DOI: 10.1103/PhysRevE.51.5515
Abstract: Using the transfer matrix method, we give the exact solution of a deterministic sandpile model for arbitrary $N$, where $N$ is the size of a single toppling. The one- and two-point functions are given in term of the eigenvalues of an $N \times N$ transfer matrix. All the n-point functions can be found in the same way. Application of this method to a more general class of models is discussed. We also present a quantitative description of the limit cycle (attractor) as a multifractal.
Comparison of Fusion Rates between Autologous Iliac Bone Graft and Calcium Sulfate with Laminectomy Bone Chips in Multilevel Posterolateral Spine Fusion  [PDF]
Meng-Ling Lu, Tsung-Ting Tsai, Lih-Huei Chen, Po-Liang Lai, Tsai-Sheng Fu, Chi-Chien Niu, Wen-Jer Chen
Open Journal of Orthopedics (OJO) , 2013, DOI: 10.4236/ojo.2013.32023

Multilevel lumbar fusion usually requires a large quantity of iliac crest bone graft but the supply is usually insufficient, so an alternative bone graft substitute for autograft is needed. This prospective study investigated the efficacy of calcium sulfate by comparing the fusion rates between the experimental material (calcium sulfate pellets with bone chips from laminectomy) and autologous iliac bone graft in long segment (three-or four-level) lumbar and lumbosacral posterolateral fusion. Forty-five patients with degenerative scoliosis or spondylolisthesis received multilevel spine fusion and decompression. The experimental material of calcium sulfate pellets with decompression bone chips was placed on the experimental side and the iliac crest bone graft was placed on the control side. The fusion status was assessed radiographically at three-month intervals, and solid fusion was defined as a clear continuous intertransverse bony bridge at all levels. The average follow-up period was 34.4 months. Twenty-nine (64.4%) patients showed solid fusion on the experimental side and 39 (86.7%) patients on the control side. The overall fusion rate was 86.7%. A statistically significant relation was found between the two sides with the Kappa coefficient of agreement of 0.436. Compared to the control side, the fusion rate of experimental side is significantly reduced (p = 0.014). The fusion ability of autograft is higher than the experimental material in multilevel lumbar posterolateral fusion. However, the overall fusion rate of calcium sulfate pellets is improved, compared with previously reported rates, which suggested that such material may be considered as an acceptable bone graft extender.

Osteoblastic Differentiation of Rabbit Mesenchymal Stem Cells Loaded in A Carrier System of Pluronic F127 and Interpore
Jau-Wen Huang,Wen-Jer Chen,Shuen-Kuei Liao,Chuen-Yung Yang
Chang Gung Medical Journal , 2006,
Abstract: Background: Ideally, bone tissue engineering products should have the ability of osteoconductionand osteoinduction. According to the tissue engineering principle,mesenchymal stem cells (MSCs) combined with an appropriate scaffold canbe used as a bone substitute for bone defects. Here we used Interpore as ascaffold loaded with MSCs mixed in hydrogel (Pluronic F127). In order todemonstrate the osteogenic ability of MSCs in the hydrogel, cell/hydrogelscaffold constructs were cultured in an induction medium to elicit anosteoblastic response.Methods: MSCs aspirated from rabbit bone marrow were cultured in induction medium.MSCs were then loaded into scaffold Interpore with the aid of hydrogel(Pluronic F127). After culture for 7 and 14 days, osteoblastic differentiationability was tested using Alizarin Red S stain, reverse transcription polymerasechain reaction (RT-PCR), measurement of calcium and alkaline phosphataselevels, and scanning electron microscopy (SEM).Results: Calcium and alkaline phosphatase levels both increased after 7 and 14 daysincubation. Alizarin Red S staining revealed MSCs could survive and differentiateto osteoblasts in the cell/hydrogel scaffold. RT-PCR showed mRNAexpression of osteopontin and Core binding factor alpha 1 (Cbfa1). SEMrevealed growth of osteoblast-like cells on ceramic pores.Conclusions: Osteoconductive bone substitute (Interpore) has been used clinically for along time. This study showed that MSCs could be held on Interpore with theaid of hydrogel (Pluronic F127) and that they could differentiate toosteoblasts.
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