bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigation of Phytoplankton and Physico-chemical Parameters in Nursery, Growout and Broodstock Ponds
Authors: Hossain M. I. , Alam M. M. , Alam M. , Kamal B. M. M. , Galib S. M.
Published: September 2013

The study measures the relationship between physico-chemical variables with the cell density of phytoplankton in nursery, growout and broodstock ponds of fish. This study was conducted at Natore Government Fish Farm in Bangladesh from January to June, 2012. The observed physico-chemical variables like water temperature, transparency, dissolved oxygen, pH, ammonia-nitrogen, total alkalinity and total hardness were found within the standard ranges. Phytoplankton belonging to bacillariophyceae, chlorophyceae, cyanophyceae and euglenophyceae were found among the ponds but euglenophyceae with highest abundance was recorded in almost all the ponds. Total abundance of different groups of phytoplankton was recorded as mean (±SD) cell density (cell/l) (62.77±2.16)×104, (47.22±0.69)×104, and (77.12±3.42)×104 in nursery pond, growout pond and broodstock pond, respectively. Overall phytoplankton abundance was more in broodstock pond than in others. Total phytoplankton density has exhibited significantly positive correlation with dissolved oxygen (DO) and inverse relation with water temperature, pH, ammonia-nitrogen and total alkalinity in case of nursery pond. For growout pond, total phytoplankton density has exhibited significantly positive correlation with temperature and transparency, and significantly negative correlation with other physico-chemical characteristics. In case of broodstock pond, total phytoplankton density has no significant relationship with any physico-chemical variables of water.  Keywords: Nursery pond; Growout pond; Broodstock pond; Phytoplankton; Water quality, physico-chemical parameters  © 2013 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.  doi: http://dx.doi.org/10.3329/jsr.v5i3.14886 J. Sci. Res. 5 (3), 555-571 (2013)
Edge Pair Sum Labeling
Authors: Jeyanthi P. , Devi T. Saratha
Published: September 2013

An injective map f : E(G) ? {±1, ±2,  ,±q } is said to be an edge pair sum labeling of a graph G(p, q) if the induced vertex function f*:V(G) ? Z  {0} defined by f*(?) = ?e?E? f(e)   is one-one, where  denotes the set of edges in G that are incident with a vertex v and  f*(V(G)) is either of the form {±k1, ±k2,  , ±kp/2} or {±k1, ±k2,  , ±k(p-1)/2}U{kp/2}according as p is even or odd. A graph with an edge pair sum labeling is called an edge pair sum graph. In this paper we prove that path Pn, cycle Cn, triangular snake, PmUK1,n, Cn?Kmc are edge pair sum graphs. Keywords: Pair sum graph, edge pair sum labeling, edge pair sum graph.© 2013 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: http://dx.doi.org/10.3329/jsr.v5i3.15001 J. Sci. Res. 5 (3), 457-467 (2013)
DNA Damage in Lymphocytes in Hypertensive Subjects in Bangladesh
Authors: Saiedullah M. , Hayat S. , Zamir M. R. , Arif M. , Howlader Z. H. , Rahman M.
Published: September 2013

Oxidative stress due to imbalance between the production of reactive oxygen species and their dismutation is claimed to be higher in hypertensive subjects than normotensive subjects. In hypertensive subjects oxidative stress may damage deoxy-ribonucleic acids (DNA). In this study plasma superoxide dismutase (SOD) activities, protein carbonyl contents (PCCs) and extent of DNA damage in lymphocytes were measured in specimens obtained from 86 subjects to compare oxidative stress and oxidative DNA damage between normotensive and hypertensive subjects and to assess their relationship with the degree of blood pressure. Results were expressed as mean±SD. Two-tailed unpaired t test and Pearsons correlation test were done to compare or to determine the relationship between groups or variables. SOD activities were 2.85±0.12 unit/mg protein and 3.84±0.45 unit/mg protein (p<0.05) in hypertensive and normotensive groups respectively. PCCs were 4.77±0.36 nmol/mg protein and 3.75±0.23 nmol/mg protein in hypertensive and normotensive groups respectively. Olive tail moments (OTM) were 124.7±11.69 units and 108.9±9.27 units in hypertensive and normotensive groups respectively. The correlation coefficient of OTM was 0.3924 (p<0.05) for diastolic blood pressure and 0.3618 (p<0.05) for systolic blood pressure. Oxidative stress and DNA damage was higher in hypertensives than normotensives and DNA damage correlated positively with blood pressure. Keywords: Superoxide dismutase, Protein carbonyl content, Oxidative stress, Oxidative DNA damage, Hypertension, Bangladeshi population. © 2013 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi: http://dx.doi.org/10.3329/jsr.v5i3.15022 J. Sci. Res. 5 (3), 535-543 (2013)
Petrology of Exposed Basement Rocks around Shintaku of North Central Nigeria
Authors: Odedede O.
Published: September 2013

The study area is part of the Basement Complex of North Central Nigeria. The study aims at identifying the rock types and interpretation of the structural elements. The major rock units in the area comprises of porphyritic granite, gneiss and schist. Structural evidence shows that the rocks are deformed and where intruded by the granite. Petrographic analysis reveals the existence of feldspar phenocrysts in a groundmass of quartz and biotite. The granite is composed of quartz (25-35%), plagioclase (15-20%), orthoclase (10-20%), microcline (5-25%), biotite (15-20%) and other accessory minerals. The granites displayed a porphyritic texture while the schist and gneisses exhibit planar and linear structures. Variation in structural trend and mineralogical composition is due to the series of deformational activities which has affected the rocks during geologic time. Keywords: Monzogranite; Porphyritic; Deformation; Fractionation.  © 2013 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.  doi: http://dx.doi.org/10.3329/jsr.v5i3.15233 J. Sci. Res. 5 (3), 489-497 (2013)
Comparative Antimicrobial Activities of some Monosaccharide and Disaccharide Acetates
Authors: Matin M. M. , Bhuiyan M. M. H. , Afrin A. , Debnath D. C.
Published: September 2013

A number of furanose (2,4) and pyranose (5,7,9,11,13) acetates were prepared by direct acetylation method. For comparative antimicrobial studies sucrose octaacetate (14) was also prepared. All the compounds (1-14) were screened for in vitro antibacterial activity against ten human pathogenic bacteria viz. Bacillus subtilis, Bacillus cereus, Bacillus megaterium, Staphylococcus aureus, Escherichia coli, INABA ET (Vibrio), Pseudomonas species, Salmonella paratyphi, Salmonella typhi and Shigella dysenteriae. These compounds were also screened for in vitro antifungal activity against four pathogenic fungi viz. Aspergillus niger, Alternaria alternata, Curvularia lunata and Fusarium equiseti. The study revealed that the pyranose acetate derivatives (5,7,9,11,13) are more prone towards antimicrobial functionality than those of the furanose acetates (2,4) and sucrose octaacetate (14).  Keywords: Glucofuranose; Glucopyranose; Acetylation; Antimicrobial activity; Structure activity relationship (SAR).  © 2013 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.  doi: http://dx.doi.org/10.3329/jsr.v5i3.15695 J. Sci. Res. 5 (3), 515-525 (2013)
Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review
Authors: Juneja Ankita , Ceballos Ruben , Murthy Ganti
Published: September 2013

Due to significant lipid and carbohydrate production as well as other useful properties such as high production of useful biomolecular substrates (e.g., lipids) and the ability to grow using non-potable water sources, algae are being explored as a potential high-yield feedstock for biofuels production. In both natural and engineered systems, algae can be exposed to a variety of environmental conditions that affect growth rate and cellular composition. With respect to the latter, the amount of carbon fixed in lipids and carbohydrates (e.g., starch) is highly influenced by environmental factors and nutrient availability. Understanding synergistic interactions between multiple environmental variables and nutritional factors is required to develop sustainable high productivity bioalgae systems, which are essential for commercial biofuel production. This article reviews the effects of environmental factors (i.e., temperature, light and pH) and nutrient availability (e.g., carbon, nitrogen, phosphorus, potassium, and trace metals) as well as cross-interactions on the biochemical composition of algae with a special focus on carbon fixation and partitioning of carbon from a biofuels perspective.
Ziyuglycoside II Inhibits the Growth of Human Breast Carcinoma MDA-MB-435 Cells via Cell Cycle Arrest and Induction of Apoptosis through the Mitochondria Dependent Pathway
Authors: Zhu Xue , Wang Ke , Zhang Kai , Huang Biao , Zhang Jue , Zhang Yi , Zhu Lan , Zhou Bin , Zhou Fanfan
Published: September 2013

Ziyuglycoside II is one of the major active compounds of Sanguisorba officinalis L., which has a wide range of clinical applications including hemostasis, antibiosis, anti-inflammation and anti-oxidation. This study investigated the effect of ziyuglycoside II on the growth of human breast carcinoma MDA-MB-435 cells for the first time. The results showed that ziyuglycoside II could significantly inhibit the growth of MDA-MB-435 cells through blocking cell cycle progression at G0/G1 and S phase as well as via inducing cell apoptosis. Accumulation of reactive oxygen species (ROS) was observed in the progression of cell cycle arrest, which was associated with the increased expression of cell cycle regulating factors, p53 and p21. Subsequent apoptosis induced by ziyuglycoside II was accompanied with the activation of mitochondrial pathway, in particular a decreased mitochondrial membrane potential (MMP) as well as increased Bax/Bcl-2 ratio, cytochrome c release and the activity of caspase-3 and caspase-9. In conclusion, our study was the first to report that ziyuglycoside II has inhibitory effect on the growth of MDA-MB-435 cells, which might become a potential therapeutic approach of breast cancer in the future.
Homogenized Elastic Properties of Graphene for Small Deformations
Authors: Marenić Eduard , Ibrahimbegovic Adnan , Sorić Jurica , Guidault Pierre-Alain
Published: September 2013

In this paper, we provide the quantification of the linear and non-linear elastic mechanical properties of graphene based upon the judicious combination of molecular mechanics simulation results and homogenization methods. We clarify the influence on computed results by the main model features, such as specimen size, chirality of microstructure, the effect of chosen boundary conditions (imposed displacement versus force) and the corresponding plane stress transformation. The proposed approach is capable of explaining the scatter of the results for computed stresses, energy and stiffness and provides the bounds on graphene elastic properties, which are quite important in modeling and simulation of the virtual experiments on graphene-based devices.
Pretreatment and Membrane Hydrophilic Modification to Reduce Membrane Fouling
Authors: Sun Wen , Liu Junxia , Chu Huaqiang , Dong Bingzhi
Published: September 2013

The application of low pressure membranes (microfiltration/ultrafiltration) has undergone accelerated development for drinking water production. However, the major obstacle encountered in its popularization is membrane fouling caused by natural organic matter (NOM). This paper firstly summarizes the two factors causing the organic membrane fouling, including molecular weight (MW) and hydrophilicity/hydrophobicity of NOM, and then presents a brief introduction of the methods which can prevent membrane fouling such as pretreatment of the feed water (e.g., coagulation, adsorption, and pre-oxidation) and membrane hydrophilic modification (e.g., plasma modification, irradiation grafting modification, surface coating modification, blend modification, etc.). Perspectives of further research are also discussed.
Kernel-Based Aggregation of Marker-Level Genetic Association Tests Involving Copy-Number Variation
Authors: Li Yinglei , Breheny Patrick
Published: September 2013

Genetic association tests involving copy-number variants (CNVs) are complicated by the fact that CNVs span multiple markers at which measurements are taken. The power of an association test at a single marker is typically low, and it is desirable to pool information across the markers spanned by the CNV. However, CNV boundaries are not known in advance, and the best way to proceed with this pooling is unclear. In this article, we propose a kernel-based method for aggregation of marker-level tests and explore several aspects of its implementation. In addition, we explore some of the theoretical aspects of marker-level test aggregation, proposing a permutation-based approach that preserves the family-wise error rate of the testing procedure, while demonstrating that several simpler alternatives fail to do so. The empirical power of the approach is studied in a number of simulations constructed from real data involving a pharmacogenomic study of gemcitabine and compares favorably with several competing approaches.
Enhanced QSAR Model Performance by Integrating Structural and Gene Expression Information
Authors: Chen Qian , Wu Leihong , Liu Wei , Xing Li , Fan Xiaohui
Published: September 2013

Despite decades of intensive research and a number of demonstrable successes, quantitative structure-activity relationship (QSAR) models still fail to yield predictions with reasonable accuracy in some circumstances, especially when the QSAR paradox occurs. In this study, to avoid the QSAR paradox, we proposed a novel integrated approach to improve the model performance through using both structural and biological information from compounds. As a proof-of-concept, the integrated models were built on a toxicological dataset to predict non-genotoxic carcinogenicity of compounds, using not only the conventional molecular descriptors but also expression profiles of significant genes selected from microarray data. For test set data, our results demonstrated that the prediction accuracy of QSAR model was dramatically increased from 0.57 to 0.67 with incorporation of expression data of just one selected signature gene. Our successful integration of biological information into classic QSAR model provided a new insight and methodology for building predictive models especially when QSAR paradox occurred.
Varicella Zoster Virus (VZV)-Human Neuron Interaction
Authors: Baird Nicholas , Yu Xiaoli , Cohrs Randall , Gilden Don
Published: September 2013

Varicella zoster virus (VZV) is a highly neurotropic, exclusively human herpesvirus. Primary infection causes varicella (chickenpox), wherein VZV replicates in multiple organs, particularly the skin. Widespread infection in vivo is confirmed by the ability of VZV to kill tissue culture cells in vitro derived from any organ. After varicella, VZV becomes latent in ganglionic neurons along the entire neuraxis. During latency, virus DNA replication stops, transcription is restricted, and no progeny virions are produced, indicating a unique virus-cell (neuron) relationship. VZV reactivation produces zoster (shingles), often complicated by serious neurological and ocular disorders. The molecular trigger(s) for reactivation, and thus the identity of a potential target to prevent it, remains unknown due to an incomplete understanding of the VZV-neuron interaction. While no in vitro system has yet recapitulated the findings in latently infected ganglia, recent studies show that VZV infection of human neurons in SCID mice and of human stem cells, including induced human pluripotent stem cells and normal human neural progenitor tissue-like assemblies, can be established in the absence of a cytopathic effect. Usefulness of these systems in discovering the mechanisms underlying reactivation awaits analyses of VZV-infected, highly pure (>90%), terminally differentiated human neurons capable of prolonged survival in vitro.
Sexual Function in Italian Women with Systemic Sclerosis Is Affected by Disease-related and Psychological Concerns
Authors: Maddali Bongi Susanna , Del Rosso Angela , Mikhaylova Svetlana , Baccini Marco , Matucci Cerinic Marco
Published: September 2013

Objective.

In patients with systemic sclerosis (SSc), sexual function is somewhat impaired. Our aim was to evaluate sexual function in women with SSc in comparison to controls, and to investigate the association with sociodemographic and disease characteristics, and physical and psychological variables.

Methods.

Forty-six women with SSc and 46 healthy women were assessed for sociodemographic characteristics and gynecological development and administered the Female Sexual Function Index (FSFI), Medical Outcomes Study Short Form-36 (SF-36), Health Assessment Questionnaire (HAQ), Hospital Anxiety and Depression Scale (HADS), Rosenberg Self-Esteem Scale, Coping Orientation to Problems Experienced-New Italian Version, and Functional Assessment of Chronic Illness Therapy-Fatigue Scale. Patients were also assessed for disease duration and subset, Female Sexual Function in SSc, Hand Mobility in Scleroderma test (HAMIS), Cochin Hand Functional Disability Scale, Mouth Handicap in Systemic Sclerosis Scale (MHISS), Disability Sexual and Body Esteem Scale (PDSBE); and fist closure, hand opening, and mouth opening.

Results.

In patients with SSc, only FSFI desire subscale score was significantly lower (p = 0.035) versus controls. Total FSFI score, similar to controls, was related with Medical Outcomes Study Short Form-36 mental component, HAQ (p = 0.022), MHISS (p = 0.038), and HAMIS (p = 0.037). In SSc, the main factors independently associated with sexual functioning were vaginal dryness [regression coefficient (B) = −0.72; p < 0.001], PDSBE (B = 0.42; p = 0.001), and HADS depression scale (B = −0.23; p = 0.035). Together, these variables explained 70% of the variance in the FSFI total score.

Conclusion.

In SSc, sexual function, although not different from controls, is influenced by specific disease-related and psychological concerns. Thus it should be included in patient evaluations and assessed in daily clinical practice.
Development, Sensibility, and Reliability of the Toronto Axial Spondyloarthritis Questionnaire in Inflammatory Bowel Disease
Authors: Alnaqbi Khalid A. , Touma Zahi , Passalent Laura , Johnson Sindhu R. , Tomlinson George A. , Carty Adele , Inman Robert D.
Published: September 2013

Objective.

There is an unacceptable delay in the diagnosis of axial spondyloarthritis (axSpA) in its early stages among patients at high risk, in particular those with inflammatory bowel disease (IBD). Our objectives were to develop a sensible and reliable questionnaire to identify undetected axSpA among patients with IBD.

Methods.

Literature was reviewed for item generation in the Toronto axSpA Questionnaire on IBD (TASQ-IBD). Sensibility of the questionnaire was assessed among healthcare professionals and patients. This assessment was related to purpose and framework (clinical function, clinical justification, and clinical applicability), face validity, comprehensiveness [oligo-variability (limiting the questionnaire to important items) and transparency], replicability, content validity, and feasibility. The test-retest reliability study was administered to 77 patients with established IBD and axSpA. Kappa agreement coefficients and absolute agreement were calculated for items.

Results.

Three domains included IBD, inflammatory back symptoms, and extraaxial features. The entry criterion required a patient to have IBD and back pain or stiffness that ever persisted for ≥ 3 months. Iterative sensibility assessment involved 16 items and a diagram of the back. Kappa coefficients ranged from 0.81–1.00 for each item. Absolute agreement across all items ranged from 91% to 100%.

Conclusion.

TASQ-IBD is a newly developed, sensible, and reliable case-finding questionnaire to be administered to patients with IBD who have ever had chronic back pain or stiffness persisting for ≥ 3 months. It should facilitate identification and timely referral of patients with IBD to rheumatologists and minimize the delay in diagnosis of axSpA. Consequently, it should assess the prevalence of axSpA in IBD.
A Randomized, Double-blind, Phase III Trial in Moderate Osteoarthritis Knee Pain Comparing Topical Ketoprofen Gel with Ketoprofen-free Gel
Authors: Rother Matthias , Conaghan Philip G.
Published: September 2013

Objective.

This randomized, double-blind, phase III study evaluated the efficacy and safety of ketoprofen in an ultradeformable vesicle gel compared with ketoprofen-free gel in osteoarthritis (OA) knee pain.

Methods.

Patients with American College of Rheumatology-defined OA of the knee and moderate pain were randomized to receive 100 mg ketoprofen in 4.4 g transfersome gel (IDEA-033) or 4.4 g ketoprofen-free vehicle (TDT 064) topically, twice daily, for 12 weeks. The primary endpoint was mean change in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain subscale score from baseline to Week 12.

Results.

Patients (n = 555) were randomized and treated. Mean baseline WOMAC pain scores were 5.2 (SD 1.0) for IDEA-033 and 5.3 (SD 1.0) for TDT 064. Mean change in WOMAC pain scores from baseline to Week 12 was 38.6% for IDEA-033 and 44.6% for TDT 064 (Mann-Whitney estimator 0.4505; p = 0.022). Both groups reported progressive decreases in pain and improvements in function and stiffness. Mean baseline WOMAC function scores decreased from 5.4 to 3.4 with IDEA-033 and 3.1 with TDT 064 at Week 12. The proportion of patients achieving ≥ 50% decrease in WOMAC pain score from baseline at Week 12 was 41.2% (95% CI 0.35–0.47) with IDEA-033 and 50.5% (95% CI 0.45–0.57) with TDT 064. Mild skin and subcutaneous tissue disorders were the most frequently reported treatment-related adverse events (AE).

Conclusions.

IDEA-033 was inferior to drug-free gel (TDT 064) in relieving moderate OA knee pain and improving joint function (Clinical TrialsNCT00722852).
Increased Levels of Interleukin 34 in Serum and Synovial Fluid Are Associated with Rheumatoid Factor and Anticyclic Citrullinated Peptide Antibody Titers in Patients with Rheumatoid Arthritis
Authors: Moon Su-Jin , Hong Yeon-Sik , Ju Ji Hyeon , Kwok Seung-Ki , Park Sung-Hwan , Min Jun-Ki
Published: September 2013

Objective.

Interleukin 34 (IL-34) is a recently discovered cytokine that binds macrophage colony-stimulating factor (M-CSF) receptor. Rheumatoid arthritis (RA) is characterized by increased osteoclastogenesis. To identify the significance of IL-34 in RA, the IL-34 concentration was measured in serum and synovial fluid (SF).

Methods.

IL-34 concentrations were measured in serum from patients with RA (n = 113), patients with osteoarthritis (OA; n = 56), and controls (n = 36), and in SF isolated from patients with RA (n = 36) or OA (n = 24). Correlations between serum IL-34 levels and clinical features in RA were assessed. The levels of IL-1β, IL-6, IL-17α, interferon-γ-induced protein 10, receptor activator of nuclear factor κB ligand (RANKL), and Dickkopf-1 were also measured.

Results.

Patients with RA had a higher mean serum level of IL-34 than did patients with OA and controls (188.0 ± 550.3, 36.6 ± 38.0, and 49.1 ± 78.5 pg/ml, respectively). Similarly, SF IL-34 concentration was higher in patients with RA than in those with OA. IL-34 levels were positively associated with IL-6 levels in serum from patients with RA and OA. SF IL-34 concentration correlated significantly with IL-6 and RANKL levels only in RA. The serum level of IL-34 was not correlated with systemic osteoporosis and radiographic joint damage in RA. IL-34 levels in the serum from patients with RA were positively correlated with rheumatoid factor and anticyclic citrullinated peptide antibody titers (r = 0.282 and 0.491, respectively).

Conclusion.

Circulating IL-34 levels in RA correlated with autoantibody production. Further investigations of localized and systemic effects of IL-34 are warranted to elucidate RA pathogenesis.
E-Behaviour Trends and Patterns among Malaysian Pre-Adolescents and Adolescents
Authors: Gnasigamoney Selvi Salome , Sidhu Manjit Singh
Published: September 2013

The threat of cyber-related crimes due to excessive usage of Internet and current e-behaviour amongst the younger children is not new in this new millennium but stays as an issue for consideration. This paper provide a general pattern of online related behaviours that seem to be taking place among Malaysian pre-adolescents and adolescents and its possible impact on their behaviours leading towards cyber-related crimes. Facts and finding from various researches conducted from different parts of the world, including Malaysia were reviewed. The results from various studies reveal that a great concern and strategies have to be put into place as the age group using the Internet has reduced and the routine activity of pre-adolescence and adolescence are changing and are based on Internet. Non-awareness of their current online behaviours and its possible link to cyber-related crimes may lead these young children to a greater threat when using e-Commerce or any other Internet dependent activities in the future. This paper focuses on the facts collected from various studies to justify the importance of having future research on this phenomenon.
An Examination of the Importance of Core Competencies and Relationship Management in IT Outsourcing Agreements
Authors: Kim Yong Jin , Song Jaeki , Baker Jeff , Kim Junghwan
Published: September 2013

In spite of the fact that IT outsourcing has been repeatedly proven to improve firms’ performance, few studies of the strategic importance of IT outsourcing have been undertaken in Eastern cultural contexts. To better understand IT outsourcing performance in an Eastern culture, the authors draw on the strategic orientation-performance framework as they investigate the unique capabilities of firms that determine IT outsourcing performance. The authors highlight the strategic role of client-vendor relationships, and explain that these relationships are influenced by IT outsourcing process management capacity, core competency orientation, and relationship-specific investment in IT outsourcing practices. The quality of this client-vendor relationship, in turn, affects the performance of the IT outsourcing unit. Empirically examining their research model through structural equation modeling, the authors present new insights for IT outsourcing by emphasizing the role of strategic decision making. The authors’ findings can enable client firms in Eastern cultures to improve the outcomes of their outsourcing decisions.
Research on Lifting Technology of Engine Hood for Protecting the Head of Pedestrian
Authors: Zhang Bao Feng , Wei Qing Kui , Li Jian Wen
Published: September 2013

In the pedestrian and vehicle collision accident, head injury is the first factor of causing death, so studying the mechanism and protective measures are very important. In this paper, based on the theory of multi-rigid-body system dynamics, used ADAMS software for simulation tools, established human body model and car mode to follow the national standard. Finally put forward a new hood lift technology. The simulation results show that the technology can effectively reduce the collision impact on pedestrian head in the traffic accident.
Second Order Recurrent Neural Network for the Inverse Kinematics of Redundant Manipulators
Authors: Hao Run Sheng
Published: September 2013

In this paper, the second order recurrent neural network is adopted to study the inverse kinematics problem of three degree-of-freedom planar redundant manipulators. The Simulation results show that the network can effectively solve the inverse kinematics problem of redundant manipulators, and it reaches to good precision of solution and solving speed.
Finite Element Simulation of Titanium Alloy Turning Process
Authors: Yin Cheng Jun , Zheng Qing Chun , Hu Ya Hui
Published: September 2013

In this paper, three-dimensional finite element model of titanium alloy TC4 was established by using three-dimensional finite simulation software-Deform.Change rule of cutting force and cutting temperature can be obtained in different cutting parameters including cutting speed, feed rate and cutting depth.
Grid-Connection Control of PV Power Generation in Micro-Grid
Authors: Zhao Hui , Wang Han , Wang Hong Jun , Yue You Jun
Published: September 2013

In the analysis of PV cells mathematical model based on the use of the admittance incremental method with constant voltage integrated maximum power point tracking (MPPT) method. In the micro-grid, PV power generation using the constant power (PQ) control, to achieve active and reactive power control. Matlab / Simulink simulation environment model of PV cells and an integrated method for maximum power point tracking, simulation results show that the synthesis method faster track to the maximum power point of the PV installations. Established PQ control model of micro-grid which based on the SVPWM, PV installations connected to the grid after the LCL filter, simulations show that the tracking of active and reactive power through the PQ control.
Controlling the Nanostructural Characteristics of TiO2 Nanoparticles Derived from Ilmenite Mineral of Bangka Island through Sulfuric Acid Route
Authors: Latifa Hanum , Yuwono Akhmad Herman , Firdiyono F. , Rochman Nurul Taufiqu , Harjanto Sri , Suharno Bambang
Published: September 2013

The ilmenite mineral (FeO.TiO2) from Bangka Island-Indonesia is an important source for synthesizing TiO2nanoparticles. However, the process is rather difficult since this mineral still contains many impurities and minor elements. Therefore, controlling the synthesizing route parameters is essential for obtaining the desired TiO2nanoparticle characteristics. In the current work, we proposed a modified process involving the use of sulfuric acid through sol-gel method to provide titanyl sulfate (TiOSO4) solution as the inorganic precursor. For investigation purposes, several parameters were varied including volume ratio of water and titanyl sulfate, addition of iron powder (seeding) and dextrin coagulant, calcination time and temperature. The results showed that TiO2nanoparticles can be succesfully synthesized using TiOSO4precursor derived from Bangka ilmenite. Under all processing conditions, the resulting TiO2nanoparticles have sphere-like shape and were indexed as the anatase TiO2phase. The results also showed that the average particle size was reduce from 96 188 nm to 32 40 nm when the volume ratio of water and titanylsulfate was increased from 3:1 to 6:1. The addition of iron powder as seeding has improved the purity of TiO2to ~ 95.01 wt%, in comparison to that of without seeding, which is ~92.78 wt%.
Research of Modular Design for Stamping Dies
Authors: Lu Shao Lei , Bi Da Sen , Yang Guang
Published: September 2013

Serialization, standardization and generalization are obvious advantages of traditional modular design method, but in the design and manufacture of stamping dies, the module must have higher flexibility, which resulted the traditional modular design method in this field shows its obvious limitations; this article introduced generalized parametric feature module method into mold design, combined with the technological requirements of the structural characteristics and design process of stamping die, stamping forming process of the mold generalized module division, and through some the process Integration generalized module reaches the completion of the purpose of the rapid design of the mold. Illustrate the generalized module design methods through a simple example, in order to show the process of making a group of cold stamping die to achieve rapid design finally.
The Application of CFD in Wood Drying Kiln System Identification
Authors: Yu Li Jun , Sun Jing Guang , Chen Jia , Wang Hui
Published: September 2013

As wood drying kiln system has the nonlinear characteristics of a large lag, multivariable, large inertia and strong coupling. It is difficult to establish an accurate mathematical model of the wood drying kiln system by using traditional mathematical Modeling method. The data of wood drying kiln is drawn by CFD-Fluent, and the translate function of the control system is obtained by Matlab system identification. The simulation results show that the method has good accuracy, and can meet the control requirements of the system.
Design and Application of Car Type Annealing Furnace Temperature Control System
Authors: Wang Yan , Lin Wen Hai
Published: September 2013

This paper introduces the often used machinery industry car type annealing furnace temperature control system design and application. Analyzes the composition of gas car type annealing furnace temperature control system, working principle and performance, puts forward the solutions to improve safety of the combustion system. Using PID algorithm module of Siemens STEP7 environment optimize the temperature control system design. Actual operation results show that the system has stable performance and high precision of temperature control, low hardware cost, meet the technological requirements.
The Computer Control System of Heat Exchange Station Based on Wireless Remote Monitoring of GPRS-Internet
Authors: Shao Lei , Liu Nan , Zuo Hai Bin
Published: September 2013

Usually the heat exchange station mainly adopts human monitoring which does not only waste human resources but also has many hidden dangers. On some control parameter adjustment, manual adjustment has a certain deviation and it is difficult to achieve the ideal running effect. The paper uses PIC single chip microcomputer as the controller core and transmits the collecting data to the monitoring center through GPRS - Internet network. This real-time monitoring system can effectively solve the problem of uneven heating caused by artificial regulate and achieve long-distance wireless remote monitoring and automatic temperature adjustment. It also has the certain energy-saving effect.
Low-Power WSN Measurement Node for Greenhouse
Authors: Chen De Hai , Chao Wei Feng
Published: September 2013

The component of the greenhouse wireless sensor network was introduced, as the same time, its working process was presented. The wireless measurement nodes were designed based on nRF9E5. The hardware and software of the actuator nodes were studied, and according to the wireless communication system characteristic designing the system of hardware and software. The system was also debugged and test run. To reduce energy consumption, low-power components and low-power wireless transmission model were utilized, and the node had two operating model: active model and standby model. The wireless measurement system is reliable and expansibility.
The Research and Design of the Dual-Band Microstrip Patch Antenna
Authors: Cao Xin Yu , Yang Hong Zhen
Published: September 2013

Microstrip patch antenna, with its diversification of feed method as well as its integration of feed network and the active circuit, become the printed antenna protagonist. In this thesis, it is carried out of single-feed rectangular microstrip patch antenna design and simulation by software. The reflection coefficient is both less than 25dB in two frequency points, of 1.85 and 2.45GHz , the input resistance is approximately 50 ohms and the reactance is small. It achieves a good match. The amount of the radiation field at the frequency points is approximately 2dB and 4dB, consistent with the small size of the indicator.
Sensitivity Analysis of a Baysian Network Model on PCM Equipments
Authors: Gao Hui Sheng , Wang Xu Rui
Published: September 2013

In power communication systems, the pulse code modulation (PCM) equipment play an important role. Its security has been a focus of attention, when the concept of cyber physical system is proposed. In order to solve the security problem of PCM equipments, a Bayesian Network (BN) model is used in this paper. By analyzing the sensitivity of BN model, we can get the influence of each input variable to outcome variables. For illustration, four PCM equipments are selected from some substations. They are utilized to show the feasibility of the BN model in evaluating the security of PCM equipments and the sensitivity analysis. Empirical results show that some effective counter measures can be found to help decision maker improve the security of PCM equipments. The BN model can effectively evaluate the security of PCM equipments. After analyzing the sensitivity, the most reasonable and effective countermeasures are advanced.
Optimal Configuration of Fault Indicator in Distribution Network
Authors: Qin Li Jun , Chen Xu Bin
Published: September 2013

Fault indicator is widely used in distribution power network. Its number and installation location both affect the fault interruption time. This paper takes use of the immune algorithm to study the optimal installation number and installation location of fault indicator in distribution network so as to achieve the maximal benefit.
Systematic Fea Study of Vehicle Exhaust System Hanger Location Using Addofd Method
Authors: Noorazizi M.S. , Aminudin B.A. , Zetty M.I.
Published: September 2013

Under excitation of the engine and road surface, the vibration energy of the exhaust system which will result in the vibration of the body and produce the structure noise transfers to the body from the hanger. In view of these problems will cause noise, vibration and harshness (NVH) performance of the vehicle. A method called averaged driving DOF displacement (ADDOFD) is used to determine and optimize the exhaust hanger locations in this paper. Based on a sample vehicle, the Hyper Mesh and MSC. Nastrans oftware are adopted for meshing and calculation in the FEM modeling and vibration modal analysis of the exhaust system. Exhaust systems free-free mode and sum of its eigenvectors are offered using MSC. Nastran. Hanger locations are recommended at the position where the ADDOFD is relatively lower. Then static analysis and dynamic analysis of the exhaust system are done, and finally hanger locations of the exhaust system are selected. When the reasonable hanger positions have been decided, the vibration level of the body and the internal noise would have been decreased. This method can effectively select better NVH performance hanger locations in the earlier vehicle development process and can be extended to other types of vehicle, thus is instructive for saving both the time and the cost of operation.
Virtual Prototyping of Thermal Management Systems
Authors: Fok S.C. , Tan F.L.
Published: September 2013

This paper presents an application of computer technologyin the virtual prototyping of thermal management systems. The main advantages of this virtual prototyping approach include the search of standard thermoelectric cooling (TEC) components, as well as comparison of the thermal performances and costs of the resulting system prototypes. The framework and implementation are discussed in the paper.
Design and Study of Large Torque Electrical Load System
Authors: Wu Hong Chong , Zhang Xiao Lei
Published: September 2013

This paper presents a new type of the electrical loading system with a large torque. Based on the characteristics of this system, the paper analyses the design of this system from some aspects: the hardware system structure, the host and the guest computer software system structure, method of restraining surplus torque. It is realized by torque and position hybrid control. Through dynamic and static loading test verification, this system has a large torque, high loading frequency, the higher loading precision to meet the testing needs of the domestic high-performance electrical loading system.
Finite Element Modeling and Simulation of Machining of Titanium Alloy and H13 Tool Steel Using PCBN Tool
Authors: Sulaiman S. , Roshan A. , Borazjani S.
Published: September 2013

This paper deals with finite element modeling (FEM) and simulation of machining of titanium alloy and H-13 tool steel. Titanium alloys are very suitable for airframe manufacture and aircraft as H-13 uses forging dies and machined die casting. The machinability of both metals was evaluated by high temperature and tool wear. Finite element simulation was performed with ABAQUS explicit software to predict cutting temperature and stress distribution during metal cutting process. The purpose of this study was evaluation the performance of PCBN cutting tool material on machining of titanium alloy and H-13. It was found that PCBN tool can resistant well against high thermal shocks, high temperature and stress distribution when machining difficult to cut materials. The results can give a better understanding of cutting tool material for metal cutting process.
Requirement Analyses for Hybrid Bus Power Supply
Authors: Qu Xiao Dong , Wang Qing Nian , Yu Yuan Bin , Sun Wen
Published: September 2013

A hybrid bus power supply project is presented in this paper, compared with the characters of current bus power supply. The paper establishes a dual power supply ( engine and bus power supply) hybrid bus power distribution simulation model, and analyses the requirements of the power supply for hybrid bus. In order to analyses the requirements of HEV bus power supply, the model is under the theory of HEV control strategies.
A New Kind of Asymmetric DC-DC Converter for Vehicle
Authors: Xie Yi , Luo Wen Guang
Published: September 2013

This paper presents the design of a new bi-directional DC-DC converter topology, which solves the problem that the IGBT current stress. The DC-DC converter uses soft-switching technology. By adopting the suggested method, the voltage stress and the switching loss of the IGBT can be reduced considerably. Moreover, the topology is very simple, we can analyze and build the topology electric circuit very easily. Finally, this paper uses Simulink module of Matlab software to simulate the process, and shows the experimental result. And the result shows us the DC-DC converter has great efficiency.
10kV Grid Arc Grounding Over-Voltage Hazards and Countermeasures
Authors: Wang Qing Hao , Huang Zi Jun , Li Zhi Gang , Fang Bo , Hu Gui Bin
Published: September 2013

Through the analysis of 2 single-phase grounding over voltage accidents caused by capacitive over current in 10 kV power grid in this paper, the causes and damages of arc grounding over voltage are illustrated, and the necessity of capacitive current test and effective methods are pointed out. The test and assessment to the 29 substations capacitor currents provides a scientific basis for the correct selection of the neutral point operation mode, and the strengths and weaknesses of the neutral Point grounding through the arc suppression circle and the mode trends of 10kV grid neutral grounding are demonstrated.
Multiple Output Single-Ended Flyback DC-DC Switching Power Supply Design
Authors: Chen De Zhi , Bai Bao Dong
Published: September 2013

The paper described selection principle of the device, carried out a detailed analysis and the design of the diagram of the high-frequency transformer. At the same time, the PCB layout design was put forward. Experimental results show that the power supply would still be able to output stable DC in the case of grid voltage fluctuation and larger load disturbance, had the characteristic of good stability and high precision, all parameters can meet the system requirements.
Zero Drift Automatic Suppression Technology for Non-Inertia Integrating Circuit Based on C8051F350 MCU
Authors: Teng Teng , Zhao Zhi Hua , Tao Tao
Published: September 2013

The non-inertia integration circuit is a basic segment for the reduction of DC or low-frequency small signals. Whether the circuit can work normally or not depends on zero drift. Through a detailed study of a certain non-inertia integrating circuit, this paper has proposed a kind of zero drift technology based on C8051F350 to automatically suppress the drift voltage from the input of the operational amplifier by injecting the suppression signals into the input of the amplifier directly. This technology is designed to ensure that the integrating circuit can work accurately for more than 10 seconds. The experiments have shown that the technology is effective and feasible.
Impact of Pulse Quenching Effect on Sensitive Area at Advanced Technologies
Authors: Xu Wen Tao , Guo Yang , Du Yan Kang
Published: September 2013

The impact of pulse quenching effect on the sensitive area is evaluated by using three-dimensional technology computer-aided design (TCAD) numerical simulation. Simulation results present that the pulse quenching effect could effectively reduce the sensitive area of PMOS transistors. By adopting the off-state gate isolation technique, the sensitive area is further reduced.
Design of Radar Level Measurement Instrument Based on the UC3844
Authors: Leng Jian Wei , Jia Xu
Published: September 2013

Introduced the internal function of UC3844, and analyzed the working important point of switching power supply. Planning and design of the radar level measurement instrument of multiple output power supply circuit.
Dynamic Integrated Protection and Development of Historic Area: A Case Study of Jinggang Mountain Conservation Planning
Authors: Liu Qi , Wang Bao Zhu
Published: September 2013

This paper discusses on the extension of integrated protection, and aim at the contradiction of protection and development of the history protection area. Put forward the dynamic development protection concept as a solution. Take the conservation planning practice of Jinggang Mountain revolutionary site area as an example, analyze the dialectical relationship between protection and development, discusses the possible of dynamic integrate development view in the protection planning.
Wavelet Analysis: Mother Wavelet Selection Methods
Authors: Ngui Wai Keng , Leong M. Salman , Hee Lim Meng , Abdelrhman Ahmed M.
Published: September 2013

Wavelet analysis, being a popular time-frequency analysis method has been applied in various fields to analyze a wide range of signals covering biological signals, vibration signals, acoustic and ultrasonic signals, to name a few. With the capability to provide both time and frequency domains information, wavelet analysis is mainly for time-frequency analysis of signals, signal compression, signal denoising, singularity analysis and features extraction. The main challenge in using wavelet transform is to select the most optimum mother wavelet for the given tasks, as different mother wavelet applied on to the same signal may produces different results. This paper reviews on the mother wavelet selection methods with particular emphasis on the quantitative approaches. A brief description of the proposed new technique to determine the optimum mother wavelet specifically for machinery faults diagnosis is also presented in this paper.
Study of Changes the Tool Wear of the Cutting Tool Part of Stainless Steels ELC X04Cr18Ni9Ti during Drilling
Authors: Jurko Jozef , Panda Anton
Published: September 2013

The basic hypothesis of this article focuses on the study changes in the tool wear during drilling of stainless steels ELC X04Cr18Ni9Ti. The problem of drilling holes with diameter D=2 to 8 mm resides in the fact that 20 to 30% of these holes do not comply with prescribed requested requirements. This article presents the results of experiments focusing on the study of the damage process in helical drills with diameter d=8.0 mm when drilling into austenitic stainless steel ELC X04Cr18Ni9Ti. This study also includes an analysis of accompanying phenomena in the cutting zone by measuring some selected parameters.
Stator Flux Orientation Decoupled Power Control of Doubly-Fed Induction Generator
Authors: Zhang Feng , Bai Chong Chong , Qiao Feng , Lu Ye Hui
Published: September 2013

The overall mathematical model of doubly-fed induction generator (DFIG) is established in this paper, a controller is designed in detail for DFIG under the strategy of stator flux orientation (SFO). Simulation studies are carried out in this paper with Matlab/Simulink under three operation states of DFIG, the simulation results verified that the controller designed can realize the decoupling of active and reactive power effectively.