bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Assessment on Edgewise Compressive Strength of Heavy Sandwich Fiberboard
Authors: Hua Guang Jun , Fei Wei Min , Liao Ze Shun , Xie Yong
Published: January 2015

The application status of heavy duty corrugated paperboard and honeycomb fiberboard were reviewed. In order to contrast the edgewise compressive strength of the two typical sandwich fiberboards, the finite element models of honeycomb fiberboard and AAB flute corrugated fiberboard with large sample size were established. By numerical simulation method, the effect of structure on the edgewise compressive strength were decoupled from the factor such as the materials, material consumption, sample size and shape, processing technology and environmental conditions etc. Under the same material, material consumption and sample size, bulking analysis based on numerical method was carried out. The results show that the edgewise compressive strength of both sides of the honeycomb fiberboard is about 50% higher than that of AAB flute corrugated fiberboard, and honeycomb fiberboard is similar to bi-isotropic material. The conclusions obtained are valuable to reasonable choice of the honeycomb fiberboard and heavy duty corrugated fiberboard and correct understanding the mechanical properties of the two sandwich fiberboard.
Combined Strengthening-Toughening Technology of High Property Titanium Alloys for Aviation Uses in China
Authors: Zhu Zhi Shou , Wang Xin Nan , Shang Guo Qiang , Fei Yue , Yu Han Qing
Published: January 2015

Combined strengthening-toughening technologies of several high property titanium alloys, such as TC4-DT, TC6, TC18, TC21 for aviation uses, have been studied via purification, quasi-b heat treatment, quasi-b forging and grain refinement. The effects of microstructure parameters of lamellar structure, basket-weave structure, refined grain structure etc. on the comprehensive mechanical properties of titanium alloys have been analyzed. The results have shown that, to acquire highly comprehensive static mechanical properties and excellent damage tolerance properties, quasi-b treatment and purification processing should be used for medium strength titanium alloys to get high ductility lamellar structure, while quasi-b forging processing be utilized for high strength titanium alloys to obtain high ductility basket-weave structure. Grain refinement processing is very necessary for both the strength levels of titanium alloys.
Finite Element Analysis of Residual Stress/Strain for Composite Material Part with Zinced Sheet/TPO during Forming Process
Authors: Ji Liang Bo , Xia Qin Xiang
Published: January 2015

Based on the indirect thermal-stress coupled strategy that the first analysis was temperature field and the second analysis was stress field, the process induced residual stress/strain of composite parts with zinced sheet and TPO was numerical simulated by ANSYS software. Moreover, history of residual stress/strain at along fiber orientation and vertical fiber orientation composite material were analyzed. Compared to the forming of composite material part in test, the validity of the results calculated by model was proved.
Microwave Assisted Self-Propagating High-Temperature Synthesis for Joining SiC Ceramics and SiC/SiC Composites by Ni-Al System
Authors: Han Shao Hua , Rosa Roberto , Casalegno Valentina , Salvo Milena , Veronesi Paolo , Ferraris Monica , Leonelli Cristina
Published: January 2015

Microwave has been applied to ignite the Self-propagating High-temperature Synthesis (SHS) of compacted Ni-Al mixtures, having 1:1 atomic ratio, in order to join Chemical Vapor Deposition (CVD) SiC ceramics and SiC/SiC composites. The average joint thickness of CVD SiC joint is about 200 μm and the Coefficient of Thermal Expansion (CTE) mismatch between CVD SiC and Ni-Al intermetallic compounds results in a interface bond strength inferior to that of the substrate and joining material; on the other hand, for the SiC/SiC composite joints, as a result of the porosity of SiC/SiC composites, the SHS products readily infiltrated into the pore spaces of the composite, leading to an increased porosity of the joint area and a better lower interface than the upper one. The mechanical strength of the joints has been evaluated by Single-Lap (SL) shear test at room temperature; neither of the ceramic joints nor the composites joint gave satisfactory results, but the ceramic joints reaching a maximum shear strength value of 56MPa exhibited a positive aspect for further experiments.
The Effect of the Different Constraint Degree on the Temperature Stress and Strain of Concrete
Authors: Song Xue Feng , Fan Zhi Hong , Li Chao , Zhang Bao Lan
Published: January 2015

This paperstudied the development of stress and strain influences by different constraintdegree based on the concrete thermal stress tests. furthermore, suggested thevalue range of the constraint degree in the thermal stress test.
A Prediction Model of Surface Roughness in Micro End Milling
Authors: Yuan Mei Xia , Wang Xi Bin , Jiao Li , Li Yan
Published: January 2015

Micro-milling orthogonal experiment of micro plane was done in mesoscale. Probability statistics and multiple regression principle were used to establish the surface roughness prediction model about cutting speed, feed rate and cutting depth, and the significant test of regression equation was done. On the basis of successfully building the prediction model of surface roughness, the diagram of surface roughness and cutting parameters was intuitively built, and then the effect of the cutting speed, feed rate and cutting depth on the small structure surface roughness was obtained.
Design of Injection Mould for the Mouse Shell with Two-Step Parting Mechanism
Authors: Li Hui , Yin Tian Tian
Published: January 2015

Theinjection mould was designed through process analysis of the mouse shell.According to its size and structural features, the mould adopted double-cavitymould with two-step mechanism, latent type point gate feeding, lateralcore-pulling mechanism with inclined guide pillar, internal core-pullingmechanism with diagonal handspike. The practice use proved that everymechanism of mould worked flexibly with safety and reliable operation, qualityof plastic partmeted the requirements.
Extrusion Swelling on the Co-Extrusion Process of Variable-Burning Rate Propellant by Numerical Simulation
Authors: Chai Jun , Ma Zhong Liang
Published: January 2015

The three-dimensional flow of seven holes variable-burning rate propellant in co-extrusion dies was simulated based on finite element method. The influence of long diameter ratio to interface radius and extrusion swell were analyzed. The result shows that keep the length to diameter ratio L/D0 between 3.5 ~ 13, can control interface radius changes in the process of the extrusion processing co-extrusion processing .And D/D0 reflect the viscoelastic fluid from the shear strain response ability.
Physical Modeling for Motional Cable under Smooth Plane Constraint
Authors: Jin Wang Tao , Liu Jian Hua , Tang Cheng Tong , Liu Jia Shun
Published: January 2015

In order to solve the contact problem of motional cable and plane, a physical model based on thin elastic rod theoryfor motional cable is proposed.The modelanalyzes the contact problem and formulates the constraint equations by using the Lagrange multiplier. The model is solved by the method of nonlinear constrained optimization. And an example of text is given to prove the feasibility of the model and the solution. The result shows that the model and solution can truly represent the deformation characteristics of the cable under smooth plane constraint.
A Study on the Numerical Analysis of Main Valve for Emergency Escape Using Marine Craft CO2 System
Authors: Lee Jae Hoon , Kim Si Pom , Jeon Rock Won , Oh Hyeok Woo , Kang Dong Ho
Published: January 2015

Recently, there have been growing concerns on ships, one of the means to transport plant facilities, as studies on developing large scale plant facilities have been carried out. Particularly, carbon dioxide system, one of the fire safety systems, is mainly used as the fire safety facility of ships, and main valves are employed for supplying carbon dioxide. However, studies on main valves used in ships are yet to be carried out more. Especially, when carbon dioxide is sprayed as a main function of main valves at lower pressure than required, firefighting is put into difficulty. Accordingly, to solve such problem, this study observed internal pressure change using flow analysis of the main valve, then conducted fluid-structure interaction analysis based on its result, and finally investigated disk’s opening and closure and the structural safety and characteristics depending on valve’s inlet and outlet diameters.
Application of a New Smith Fuzzy PID in Electric Boiler Temperature Control System
Authors: Gu Qiang , Zheng Feng Long , Liu Bin Bin , Yang Wen Yan
Published: January 2015

Since the object model is time-varying and time-delay in the electric boiler temperature control system, Smith Fuzzy PID controller is applied in it. Simulation results in the paper show that the overshoot is reduced by 31.3% compared with the system under Smith PID control and the adjusting time reached a 30% reduction compared with those under Fuzzy PID control with T=380 and τ=110. In order to eliminate the oscillation problem in system when model parameters change, a new Smith Fuzzy PID controller with two degrees of freedom is applied, whose control performance is much better than that of Smith Fuzzy PID.
Research and Applications of Functional Pants Warmth Retention Structure and Temperature Control System
Authors: Liu Hao , Meng Qing Chang , Zhang Qing , Ma Hao
Published: January 2015

To meeting the special requirements of lower extremity handicaps pants structure, the clothing structure and functions theoretical research and practical design are implemented on appearance , comfort, movement, protection and warmth retention. In pants warmth retention, combination of electronic aided temperature control system and functional clothing is proposed in design. The design improve the warmth satisfaction of current handicap winter pants and comfort.
Adaptive Traffic Signal Control Based on Path Priority
Authors: Zhang Jian Wei , Tan Guo Zhen , Ding Nan , Liu Ming Jian
Published: January 2015

in face of urban traffic congestion, the existing trafficcontrol system available today pursues rapid evacuation of vehicles at singleintersection and fails to take into account of the coordination between intersections,resulting in the worsening of urban traffic congestion. In order to solve theurban traffic congestion problem, an adaptive control based on the priority ofthe city path is proposed based on the PageRank priority model, a bettersolution to the traffic congestion of the city. In this strategy, the aim is tominimize the queue length of vehicles in urban road network. The releasepriority of each section is calculated based on the PageRank model. For asingle intersection point of control, the vehicle traffic volume is optimizedby the Maximum Clique Problem theory. The experiment takes 19 intersections inDalian as examples and is carried out on the VISSIM traffic simulation platform.The simulation results show that the adaptive control based on the pathpriority has good effect on reducing urban traffic congestion and evacuating vehicles.
Study of the Testing System for Roadheader Pump and Motor
Authors: Zhang Xin , Zhao Ji Long , Zeng Qing Liang
Published: January 2015

For the performance testing demands of roadheader hydraulic components, a hydraulic system of multi-interface and high-precision sensors is built and the signal acquisition and processing system based on PLC and data acquisition card high speed acquisition module is established. A software system based on LabWindows/CVI is developed. High precision, reliability, stable and functional test system is built by using precise sensor technology, electro-hydraulic proportional control technology and automation instrument technology, and then the pump and motor performance tests is completed. The system can simulate the actual working conditions of the pump and motor, making the test results more accurate and credible.
Study on Application of Intelligent Adaptive Genetic Algorithm of Electric Vehicle Charging System Based on
Authors: Zhou Li
Published: January 2015

Load with uncertain factors in time and space charge electric cars, electric vehicle charging mass disorder will lead to peak distribution network load exceeds the limit device allowed, and will bring the serious influence to power grid operation. By smoothing the distribution network daily load curve as the optimization objective, is established considering electric vehicle intelligent electric vehicle charging demand constraint of each user charge control strategy to solve the model, and use adaptive genetic algorithm to solve. Through the IEE33 node distribution network system as an example, the use of car grid Monte Carlo stochastic simulation scene based on the comparative study of the disorder, charging and intelligent charging two kinds of control mode, the influence factors of electric vehicle load on the distribution network, thus validating the use of the proposed method is effectiveness and reliability to achieve smooth load.
The Study and Application of the Nitrile Gloves’ Production Line’s Online Measurement
Authors: Cai Jian Jun , Han Jian Bing , Qu Su Qin
Published: January 2015

In order to solve the problem of the hand module’s online temperature measurement in Nitrile glove production line process, we have developed a set of moving objects or device used for online temperature measurement. The device is mounted infrared temperature sensor, by using PLC-controlled synchronous tracking technology it can track the hand module in the production line, so it can ensure the infrared temperature sensor and hand module synchronously measure its temperature correctly. By using configuration software kingview, we have developed mold temperature monitoring online measurement interface, real-time monitoring of the mold temperature opponents. After analysis of experimental results we concluded that the device work stable, acquisition of temperature reliably, so it has a promotional value.
Research on Digital Controls of Piston Pumps Based on Compound Control Using Feed-Forward and Feedback Controls
Authors: Zeng Qing Liang , Liu Bin Bin , Wang Xin Chao , Gu Qiang
Published: January 2015

Taking the swash plate piston pump as the research plant, the paper introduces the composition of digital control system of variable pump first; Then the mathematical model of variable mechanism is established according to which the closed-loop flow control system and the power control system are worked out. Also, the paper shows the stability margin of the control system and analyzes some response indices to step command under Matlab simulation. Aiming at the shortage of the closed-loop control system, the paper gives an idea of an optimization design of the compound power control system based on both feed-forward and feedback control. Compared with the conventional closed-loop power control method, the compound one gets a 47.2% reduction in the adjusting time and a 38.2% decrease in the overshoot indicating that the adjusting process is obviously shortened and the disturbance effect effectively weakened.
Design of AD Controller Customized IP Core Based on FPGA
Authors: Huang Xiang Sheng
Published: January 2015

This design elaborates thedevelopment process of the custom IP core AD9280 controller based on FPGA. Thedesign uses FPGA as the core of the microcontroller, realizes the function ofAD controller by adopting the hardware description language,Verilog HDL and encapsulates it to the custom IP core in the SOPCBuilder. In the NIOS II, the application program interface (API) function ofthe AD controller software is used to access and control the hardware, thesoftware is written by using C language. The experimental results show thatthis custom IP core is feasible and flexible, fully reflects the advantages ofSOPC technology.
Research Progress of Energy Management System for New Energy Vehicles
Authors: Lv Shuai Shuai , Chen Qing Qing , Chen Xiang , Ni Hong Jun
Published: January 2015

The typical structure of energy management system for new electric vehicle was analyzed to summarize the function. The research trend was pointed out based on the analysis of performance characteristics of energy management system for electric vehicle.
Plant Electrical Signal De-Noising Based on the Lifting Wavelet Transform
Authors: Li Yu Shuang , Tian Li Guo , Wei Jiang Lin , Li Meng , Zou Jiang Tao
Published: January 2015

In this paper, plant electrical signal of Aloe vera L. was collected by experimental system which was built in the laboratory of writer .And used MATLAB to de-noise processing and analyzing. We adopted both traditional and lifting wavelet transformation respectively, compared to two results, we can know that analyses which based on lifting wavelet transformation are more accurate and quick ,It is more suitable for weak signals in future research and analysis.
The Design of System to Texture Feature Analysis Based on Gray Level Co-Occurrence Matrix
Authors: Liu Li Yuan , Fan Xiu Juan
Published: January 2015

The characteristic value of gray level co-occurrence matrix to extract can well express the information of texture. Co-occurrence matrix provides the information of image grayscale, interval and change. According to the co-occurrence matrix, it can calculate the corresponding characteristic values of eigenvalue, which can express the texture information of the image. This is thesis designed extraction software a for textile fabric texture feature, and the internal principle is the using of gray level co-occurrence matrix and Matlab programming.
Research on the Web Chinese Keywords Extraction Algorithm Based on the Improved TFIDF
Authors: Yu Cui Yuan , Shan Jie
Published: January 2015

An improved extraction algorithm of Web Chinese keywords is proposed in this paper based on the traditional feature words weighted algorithm—TFIDF. A series of controlled experiments have proved that the improved algorithm is superior to the traditional one for higher accuracy and recall rate, and it can precisely and automatically extract the key words from the target documents.
Experimental Research on Nano Infrared Smoke Material
Authors: Liu Geng Ran , Zhang Xing Gao , Mi Pu Chun
Published: January 2015

this paper develops a kind of nano infrared smoke material with static explosion contrast test with copper powder material. In the condition of reducing charge amount, the smoke property has been improved to a large extent. The loading density of original copper powder material is 2.3 g/cm3 with effective shielding period of no more than 60s for intermediate & far infrared and action area of 100 m2. However, nano infrared smoke material, with density of no more than 1.6 g/cm3, can have an effective shielding period of more than 70s for intermediate & far infrared and action area of over 120 m2.
Detecting Link Communities Based on Hadoop
Authors: Yang Xue Yi , Huang Lan , Wang Kang Ping
Published: January 2015

Overlapping community detection is a key approach to study the structure of network. Link community approach redefines the community into the collection of edges, which shows great advantages. But with the increasing number of edges in the network, the efficiency of link community algorithm is severely degraded, so that this algorithm lost scalability. In order to detect the large overlapping community efficiently, we proposed a method DLCH (detecting link communities based on Hadoop), mapping link communities method to MapReduce framework, an efficient detecting communities platform for large complex communities. It can successfully store and process massive data by HDFS, and divide the work to map and reduce tasks, which can detect the complex communities efficiently. According to the experiments on standard test data, this method is scalable and effective.
Development Technology of Excel Data Server Application with DELPHI ADO + RemObjectcs Combined (Part 1: The Server Side)
Authors: Yan Hai Zhong
Published: January 2015

Microsoft office Excel is an important part of the Microsoft Office suite of software that can be processed, statistical analysis of various data, with its quick style and rich functionality has been generally welcomed, but with the database networking and sharing trends deepening, Excel application bottlenecks in stand-alone mode began to appear, and the network is the computer information technology in today's inevitable end, I imagine combining ADO technology developed by Delphi Excel data server in order to break this limitation, changes in non-network applications Excel mode.Excel Data Server is a set of services and client program, the server deployed on the server, the client is retrieved by the query language SQL, Excel data file can perform various operations and customer interface directly to form a Web-based application systems, customer service not only to support the application at both ends of the LAN, you can also support the application on the Internet. In this paper, Delphi7.0 support, using ADO and RemObjects SDK tools to develop an Excel data server. RemObjects referred to RO. RO version a lot, but it is recommended to use RemObjects Data Abstract 6.0.43.801, Delphi's experience in the development of it appear to be more stable, server-side and client-side data connections and programming efficiency, data manipulation more convenient.
Research and Development on 3D Simulation Training Evaluation System of Substation Based on Unity3D
Authors: Zhong Hao , Chen Xu , Shu Wen Qian , Chen Xiao Dong
Published: January 2015

In order to make training for the substation operation and maintenance personnel professional skills more effectivethis paper has designed a three-dimensional substation simulation training system based on Unity3d.In this paper,a variety of virtual scenes of the substation are studied,designed a 3Dsimulation training system of substation based on operation and maintenance personnel behavior. Framework of system comprises two-dimensional mathematical modeling, 3D modeling, development and release of platform.
Research on Cataclastic Rock Bolting Control
Authors: Dong Pei Xin , Yang Zhi Qiang , Gao Qian , Ma Hai Zhi , Wu Xiao Guang , Zhang Zhan Bin
Published: January 2015

Due to the complexity of cataclastic rock structure, joint development, cataclastic rock bolting is a difficult problem to solve. According to roadway engineering properties and deformation characteristics of liu qiao one ore two level six mining area-380 transport cross section, choose one supporting form, adopt the method of numerical simulation to analysis its supporting effect, to ensure the stability of surrounding rock and the safe running of the roadway.
Study on Highway Transportation Route Selection of Heavy and Oversize Cargo
Authors: Zhou Yan Mei , Zeng Chuan Hua , Xian Fei
Published: January 2015

  This paper discussed the main limiting factors that affects the transportion route selection of heavy and oversize cargo and established the cost and time dual objective linear model on the basis of these limiting factors. By establishing the multi-attribute utility function, this dual objective linear model was transformed into the single objective model under the principle of maximizing the multi-attribute utility function value.The optimal route was obtained by using the Dijkstra shortest path algorithm in the model solution.
Master Control System Design for Frequency Modulation Continuous Wave Radar (FMCW)
Authors: Xie Li Qin , Wang Hong Bing , Zhai Fang Fang , Wang Hong
Published: January 2015

This paper introduces the definition and composition of vehicle collision avoidance system; describes function requirements of the vehicle anti-collision system; researched and developed the related source code using LabVIEW virtual instrumental technology; solved the NI data acquisition card and anti-collision system matching problem, and completed master control program designs of the automobile anti-collision alarm system. By using a sensor device, the system can measure the car's overall performance at any time.
A Literature Review on Observation of the Pedestrian Step Forces
Authors: Xu Liang , Wang Hai Ying , Song Zhi Gang
Published: January 2015

Pedestrian step forces is an important factor in the design of long-span structures. Studies have shown that walking forces is closely related to those motion characteristics including step frequency, step length, step width, walking velocity and so on. Furthermore, the motion characteristics were observed significantly influenced by walking environment which brings many uncertainties and difficulties in studying the pedestrian forces. A comparison study of the existing observation methods including the traditional direct force measurement and the latest contemporary visual motion tracking system experiment is carried out. The results show each method has its unique advantages and disadvantages. There still have no comprehensive experimental observation method to establish load model with high reliability in the structural design and vibration control. Therefore, experimental study on walking force still has a larger space for development.
Research on Combination of Russian Architecture and Beidaihe City Landscape
Authors: Li Ai Yu , Xu Li , Guan Xiao Yue
Published: January 2015

In this paper, system view of environment, sustainable development theory and the theory of science of human settlements are introduced into design research. The method of combining theoretical and empirical research is proposed. Through the two main scenic areas of public space and urban culture, the issue of integrated design of urban public building and environment are researched in deep.
Frequency Measurement and Analysis on Liquid-Filled Pipe Based on Fiber Bragg Grating Sensor
Authors: Chen Jun Tao , Zhou Zu De , Huang Jun , Chen Fen , Song Chun Sheng , Wei Qin
Published: January 2015

Considering the characteristics of light-weight and small-size liquid-filled pipes, the method of utilizing the fiber Bragg grating (FBG) sensor to explore the natural frequency of the pipe has been proposed. Meanwhile the natural frequencies of the tested pipe were obtained through the theoretical calculation and simulation analysis. The calculation results show that the mathematical model and computing method are reliable to calculate the natural frequencies of the tested pipe. The experiments show that the measurement results of the FBG sensor are closer to theoretical calculation results. Because of added mass of the sensor, the natural frequencies of the tested pipe are lowered by the accelerometer. However, the measurement results of the FBG sensor can better reflect the actual characteristics with a negligible mass. The FBG sensor can be applied to frequency measurement, especially to those structures affected by added mass of the sensor.
Dual-Sequenced Real Coded Genetic Algorithm for Picking Process Optimization
Authors: Zheng Li Yi , Guo Shi Ping , Zhang Rong Fu
Published: January 2015

Automatic monoclonal colony picking machine with 96-probe picking module were employed to improve picking efficacy. The paper proposes a modified genetic algorithm based on dual-sequenced real coded andnew crossover operator to reduce the moving distance of the picking module in picking process. The algorithm makes the picking process more efficient. It also has good convergence speed and outstanding ability to overcome the premature convergence.
The Domain Dynamic in Fe-Based Amorphous Alloy Ribbons by Means Inductance Spectroscopy
Authors: Castrejón Arturo Mendoza , Sánchez Herlinda Montiel , Lucio Guillermo Alvarez
Published: January 2015

In the present work, a detailed study of the structural relaxation through the complex inductance response by using Inductance Spectroscopy (IS) of Fe-based amorphous ribbons obtained by as quenching ultra-rapid technique, as a function of frequency form 4 to 400 kHz and under thermal treatment during 10, 20, 40, 60, 120 and 180 min, is presented. The analysis of experimental results of IS plots of real (L ́) and imaginary (L ́ ́) inductance show evidence of magnetization processes associated with domain walls: At low fields and low frequencies, L ́ showed a plateau, followed by a dispersion with a relaxation character, the relaxation frequency is about 100 kHz (domain wall bulging). For higher fields, the inductance value depended on the field amplitude (domain wall displacement). As the frequency increased, all the curves merged into the low field plot and exhibited the same relaxation dispersion. The dependence of magnetization processes on the domain wall is determined and interpreted on the basis of the domain wall motion equation. In this way the structural relaxation associated with domain dynamic is discussed and we can establish criteria for the design of certain filters at low frequencies (from 4 to 50 kHz).
Adsorption of the Polyvinylidene Fluoride-Based Metal Affinity Membrane towards Bovine Serum Albumin
Authors: Wang Xiu Li , Zhang Fan
Published: January 2015

Three kinds of polyvinylidene fluoride (PVDF)-based immobilized metal affinity membranes (IMAM), namely, Cu (II)-IMAM, Co (II)-IMAM and Ni (II)-IMAM were prepared to recover bovine serum albumin (BSA) from the solutions. Adsorption of the aforementioned membranes towards BSA were studied with the presence of Ca (II) and PO43–. The adsorption performance of the membranes followed the order of Co (II)-IMAM > Cu (II)-IMAM > Ni (II)-IMAM. The existent PO43– exhibited a larger interference on BSA uptake than Ca (II).
Fast and Efficient Synthesis of Mono-(6-p-toluenesulfonyl)-β-cyclodextrin via Ultrasound Assisted Method
Authors: Zheng Wen Qian , Du Mei Xia , Feng Feng , Chen Guo Lin , Liao Min , Liu Yu Jian , Tang Ling , Xu Zhi Gang
Published: January 2015

The mono-(6-p-toluenesulfonyl)-β-cyclodextrin was firstly synthesized fast and efficiently by adopting ultrasound assisted method in alkaline water solution. The reaction time was only 40 min but with the yield of 31.1% under ultrasound condition. Compared with the conventional synthetic methods, the proposed novel method could shorten the reaction time and improve the yield. It is a simple, rapid and efficient method.
Surface Modification of SKD 61 by Electrical Discharge Coating (EDM/EDC) with Multilayer Rectangular Cross-Section Electrode and Jatropha curcas as Dielectric Fluid
Authors: Triyono  , Priadi Dedi , Siradj Eddy S. , Winarto
Published: January 2015

Beside being used as alternative fuel, Jatropha curcas can also be use as dielectric fluid in the Electric Discharge Machining (EDM/EDC). The use of Jatropha curcas as dielectric fluid is starting to grow due to its green characteristic. This paper discusses the effects of using Jatropha curcas combined with rectangular cross section layered electrode for cutting SKD 61 steel. It is then compared to the cutting result of EDM process using combination of kerosene dielectric fluid with solid electrode. The outcomes reveal that cutting process using Jatropha curcas as dielectric fluid in lower current produces higher surface roughness and combination of dielectric fluid with electrode type will determine surface roughness, hardness, and white layer thicknesses.
RP-HPLC-UV Method for Simultaneous Determination of Isoflavonoids in Huangqi Gegen and its Markted Formulations
Authors: Lu Wen Liang , Wang Zhi Ping , Li Wei Min , Wang Yi Fei , Zhang Yan Jun
Published: January 2015

A new simple and efficient RP-HPLC-UV method was developed for the simultaneous analysis of isoflavonoids in Huangqi Gegen and its marketed formulations. Effective chromatographic separation of ten active components was achieved on a Kromasil C18 column (4.6×250 mm, i.d.; 5 μm) with gradient elution of methanol and 0.2% formic acid aqueous solution at a flow rate of 1.0 mL/min in 60 min. Detection was performed at 250nm. The validation of the method included tests of linearity, sensitivity, precision, repeatability, stability and accuracy. All calibration curves showed good linear regression (r>0.999) within test ranges. The established method showed good precision and accuracy with overall intra-day and inter-day variations of 0.77-1.81 % and 1.38-2.47 %, and overall recoveries of 96.64-103.96 % for the compounds analyzed. The developed method was successfully applied for the quantitative analysis of constituents in Huangqi gegen and its marketed formulations.
Welding Duplex Steel Type X2CrNiMoN25-7-4 with Analysis of Ferrite Content Measurements in Welded Joints
Authors: Lalik Stanisław , Gucwa Joanna
Published: January 2015

The paper presents tests results of mechanical properties, hardness measurements, microstructure and the content of ferrite with the use of ferrite meter (feritscope) FMP30 and quantitative metallography technique with the use of Met-Ilo program in welded joints of steel X2CrNiMoCuWN25-7-4 with the use of TIG method. On the basis of achieved results of tests it was concluded that the applied technology of welding was correct and the usefulness as well as limitations of both methods were proved in the assessment of ferrite and austenite content in welded joints from duplex steel.
Zinc Coatings Obtained by Hot Dip Method on the High Strength Steel for Link Chains
Authors: Liberski Piotr
Published: January 2015

The 23MnNiCrMo52 steel is used to produce coil chains for the mining industry. The chemical composition of that steel is responsible for the high strength of chains but their corrosion resistance is not sufficient. The chains are delivered as naturally black, treated with anti-corrosion oil or painted. They are not generally protected against corrosion by hot dip zinc coatings due to their specific shape and complex chemical composition of steel. In the paper the authors present the results of tests on obtaining zinc coatings on the 23MnNiCrMo52 steel. The growth kinetics of the coatings has been defined, their structure has been developed and the chemical composition of particular structural components of the coating has been established. It has been determined that the obtained coatings are continuous and uniform and their morphology depends on the chemical composition of the galvanized steel.
Biomechanical Analysis of Selected Endoprostheses of Hip Joint by Means of Finite Element Methods
Authors: Basiaga Marcin , Przondziono Joanna
Published: January 2015

The main purpose of this paper was biomechanical analysis of hip joint endoprosthesis – femur systems by means of the Finite Element Method. During the analysis two endoprostheses with differential geometric features were selected. Geometric models of analysed implants were compiled on the grounds of real models like Merotan and The DePuy Proxima which were chosen from series diamensional. Afterwards the models were discretization and boundary conditions were set. Those boundary conditions with right accuracy copied a phenomena which occurred in real models - the Pauwels model. The field of analysis involved determination of the state of displacements, strains and stresses which were cut down in the of endoprosthesis – bone systems. The analysis that was carried out constitute the basics for optimisation of implant geometry and right selection of material’s mechanical properties to its production.
Determination of Nickel in Welding Fume by Gravimetric Method Using Dimethylglyoxime
Authors: Matusiak Jolanta , Wyciślik Andrzej
Published: January 2015

Welding fume emitted while welding stainless chromium-nickel steels contains mainly nickel oxides (NiO, NiO2 and Ni2O3). Welding in the inert gas shielding as well as plasma and laser cutting of parent materials of a high content of nickel ranks among the welding processes characterised by the highest concentrations of nickel oxides in welding fume. The predicted content of this element in the mass % range of 0.7 to 6% has been adopted as a criterion for the selection of the analytical method of the determining nickel content in the welding fume. Determination of nickel is based on dissolution of the sample in a mixture of acids, separation of nickel in the form of solid dimethylglyoxime nickel (II) and gravimetric determination. The adopted method of nickel determination in the welding fume proved to be an effective and inexpensive solution.
Evaluation of Susceptibility to Hot Cracking of Inconel 617 Nickel Alloy Welds in Transvarestraint Test
Authors: Kocurek Robert , Adamiec Janusz
Published: January 2015

Defining the susceptibility to hot cracking of Inconel 617 alloy welds is essential for assessment welding and pad welding technology. Because of that technological transvarestraint test was performed in the study. Test simulates strains that form in the material during welding. Transvarestraint test enables the assessment of susceptibility to hot cracking and resistance to hot cracking characterized by cracking threshold (εp) and critical strain speed (CSS). Performed investigations enabled to characterize the phenomena occurring in Inconel 617 during welds crystallization, which are important for engineers selecting the joining technology of Inconel 617.
Larvicidal activity of indigenous plant extracts on the rural malarial vector, Anopheles culicifacies Giles. (Diptera: Culicidae)
Authors: Kovendan K. , Mahesh Kumar P. , Subramaniam J. , Murugan K. , John William S.
Published: January 2015

Vector control is one of the most important components in combating vector-borne diseases throughout the world. Application of insecticides is a widely known and popular vector control strategy. The objective of the present study was to evaluate the larvicidal activity of the hexane, diethyl ether, ethyl acetate and acetone extracts of Abutilon indicum, Hyptis suaveolens and Leucas aspera against third-stage larvae of Anopheles culicifiacies. The results clearly suggest that all three selected plant extracts exhibited moderate larvicidal activity after 24, 48 and 72 h at 250, 500, 750 and 1000 ppm; the lethal concentrations (LC) at 50% and 90% of A. indicum, H. suaveolens against third instar larvae at 24, 48 and 72 h (hexane, diethyl ether, ethyl acetate and acetone) were as follows: A. indicum, LC50=1031.65, 949.18, 833.58 and 673.68 ppm; LC90=2215.87, 2234.39, 2152.97 and 2455.10 ppm; H. suaveolens, LC50=423.00, 347.50, 236.58 and 217.24 ppm; LC90=1431.91, 1292.15, 1138.49 and 1049.27 ppm and L. aspera, LC50=559.77, 401.56, 299.71 and 263.01 ppm; LC90=1400.80, 1549.31, 1157.96 and 1108.72 ppm at 24 h, respectively. Overall, the highest larvicidal activity was observed with H. suaveolens extract followed by L. aspera and A. indicum at various concentrations at 48 and 72 h, respectively. The objective of this investigation was an attempt to search for a user- and eco-friendly vector control agent. The study proved that the selected plant leaf extracts could serve as potent larvicidal agents against A. culicifacies in vector control programs.
A comparison of ground beetle assemblages (Coleoptera: Carabidae) in conventionally and ecologically managed alfalfa fields
Authors: Kolařík P. , Rotrekl J. , Barták M. , Krupauerová A. , Frydrych J.
Published: January 2015

From 2007-2011, the occurrence of ground beetles (Coleoptera: Carabidae) was studied using emergence traps in two differently managed alfalfa fields in the Czech Republic - a conventional and an ecological production system. In total, 784 specimens of ground beetles representing 58 species were trapped in these two alfalfa fields in South Moravia. A slightly higher number of specimens were trapped in the conventionally managed than in the ecological alfalfa stand (404 vs 380, respectively). In the conventionally managed alfalfa stand, the number of species was also higher than in the ecological stand (45 vs 40, respectively). With the exception of 2007 and 2009, Simpson’s indices of diversity were higher in the conventional stand than in the ecological in all study years. Shannon’s index was higher in the conventional alfalfa field in 2008, 2009, and 2011. Regarding distribution, species classified into group E (i.e., those without special demands on the type and quality of their habitat) dominated in both types of management throughout the experimental period. The incidence of species classified into group R (i.e., those with narrow ecological amplitude) was very low; i.e., only four species. These ground beetle species are included in the Red List of Threatened Species of the Czech Republic, and all of them (i.e. Acupalpus suturalis, Calosoma auropunctatum, Cicindela germanica and Ophonus cribricollis) are listed as vulnerable.
Progression of choroidal metastasis of ovarian serous cystoadenocarcinoma after intravitreal bevacizumab treatment
Authors: Kuo Irene C. , Sambuelli Ruben H. , Bono Javier , Smith Ricardo J. , Reviglio Victor E.
Published: January 2015

A 57-year-old woman presented to her ophthalmologist because of rapid deterioration in vision. Dilated funduscopic examination of the right eye showed an elevated, yellow-orange choroidal mass temporal to the fovea; a complete retinal detachment was present in the left eye. The patient was referred to an oncologist. Computerized tomography of the brain, thorax, abdomen, and pelvis were obtained. They revealed an 11-mm mass in the right parietal lobe, a 30-mm mass in the left temporal lobe, 23-mm mass in the right kidney, and multiple nodules in both lungs. Supported by published experience with intravitreal bevacizumab for choroidal metastasis, the patient was injected into the vitreous through the pars plana of the left eye. The tumor mass did not show signs of regression and the visual acuity was unchanged. The patient suffered from end-state complications tumor metastasis and expired one month after the invitreal injection.
Response to Targeted Therapy in Urachal Adenocarcinoma
Authors: Testa Isabella , Verzoni Elena , Grassi Paolo , Colecchia Maurizio , Panzone Filomena , Procopio Giuseppe
Published: January 2015

We report the case of a young woman diagnosed with metastatic urachal carcinoma. A multimodal approach was used for the management of this patient. Due to disease progression despite surgery and two different chemotherapy regimens (neoadjuvant capecitabine + irinotecan + oxaliplatin and docetaxel + cisplatin after surgery), treatment with sunitinib was eventually started. Treatment with sunitinib resulted in stable disease and improvement of symptoms. Sunitinib was discontinued due to the occurrence of metrorrhagia, and restarted one week later. Disease eventually progressed and the patient died 18 months after the onset of symptoms. This is the first report on the use of sunitinib for the management of urachal carcinoma and provides initial evidence supporting the use of targeted therapy in this setting.
The evaluation of essential elements defining varicose vein mapping
Authors: Franceschi Claude , Ermini Stefano
Published: January 2015

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Quick and easy method for determination of priority phenolic compounds in water and wastewater
Authors: Kumar Bhupander , Verma Virendra Kumar , Sharma Chandra Shekhar , Akolkar Avinash B.
Published: January 2015

Phenols and phenolic compounds are ubiquitous contaminants in the environment. Due to toxic potential, some phenolic compounds mainly chlorophenols and nitrophenols have been classified as priority pollutants. They enter into the environment through various sources such as industrial, domestic and vehicular emissions. For compliance of national and international regulations, various analytical methods have been developed for assessment in the environmental matrices. This paper presents quick, easy and reliable method for simultaneous determination of eleven priority phenolic compounds in wastewater using reversed-phase high-performance liquid chromatography and diode array detector. Liquid-liquid extraction technique with dichloromethane in acidic condition was used for the extraction, and chromatographic separation of compounds was carried out on a C18 column with water and methanol as the mobile phase. The following parameters like selectivity/ specificity, linearity (R2), range, limit of detection (LOD) and quantification (LOQ), precision (repeatability) and accuracy (recovery) were validated for consistent and reliable results. Calibration curves for all compounds were linear (R2, 0.998-0.999) within the concentration range of 5-125 (μg/mL). The LOD and LOQ of the method ranged between 0.11- 0.61 μg/L and 0.37-2.04 μg/L, respectively. This method was applied to quantify phenolic compounds in wastewater samples from urban drain with good separated peaks, precision and accuracy.
Analytical Method Development for the Determination of Polycyclic Aromatic Hydrocarbons in Biological Samples
Authors: Desrosiers M.
Published: January 2015

Polycyclic aromatic hydrocarbons (PAHs) are major group of contaminants for sediment mon- itoring and are included in most of the priority pollutants lists of environmental regulatory agencies [...]
Motility of Adherent Hemocytes as a Potential Marker of Immunocompetence and Immunotoxic Effects in Bivalves
Authors: Péden R. , Le Foll F.
Published: January 2015

Hemocytes are the formed elements of hemolymph, found as circulating immunocom- petent cells in the open vascular system of bivalve molluscs [...]
Effect of ethofumesate herbicide on energy metabolism in roach (Rutilus rutilus)
Authors: Maes V. , Vettier A. , Dedourge-Geffard O. , Geffard A. , Paris-Palacios S. , Betoulle S. , David E.
Published: January 2015

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Ecotoxicity of a potential drug nano-formulation: PAMAM-dendrimer and minocycline
Authors: Blaise C. , Gagné F. , Auclair J. , Maysinger D. , Sutthivaiyakit P.
Published: January 2015

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4-Nonylphenol Disrupts Osmoregulation in the European Sea-Bass Dicentrarchus Labrax
Authors: Farcy E.
Published: January 2015

4-Nonylphenol (4-NP) is a synthetic organic chemical able to mimick the action of the nat- ural female hormone 17 β -estradiol (E2) by binding to the E2 receptor [...]
The psychometric properties of the Emotional Quotient Inventory 2.0 in South Africa
Authors: Van Zyl Casper J.J.
Published: January 2015

Orientation: Psychological assessments require continued refinement, updating and evaluation.Research purpose: The purpose of this study is to examine the psychometric properties of the Emotional Quotient Inventory (EQ-i) 2.0 in South Africa. Item response and classical test theory methods are employed to investigate its item functioning and factor structure.Motivation for the study: Although there has been some scientific research published on the EQ-i in South Africa, there has been no research on the revised version, the EQ-i 2.0. In addition, criticism has been levied against the estimation of internal consistency reliability in the field of emotional intelligence. This study aims to fill these gaps in the literature.Research design, approach and method: This study followed a quantitative, non-experimental,cross-sectional design using secondary data. The sample comprised 1144 working adults(570 men and 574 women). The data were collected through an online platform as part of the standardisation process in South Africa.Main findings: Results from Rasch analysis showed that almost all the items fit the model.Cronbach’s alpha and McDonald’s omega estimates revealed satisfactory reliabilities.Confirmatory factor analysis at the composite level revealed acceptable fit with the exception of the total EQ model.Practical/managerial implications: This study supports the claim of reliability and validity ofthe EQ-i 2.0 in the South African context.Contribution/value-add: The study contributes significantly to the international body of evidence regarding the psychometric properties of the EQ-i 2.0 and provides supporting evidence for the appropriate use of this assessment in South Africa.