bluuebunny/crossref_metadata_2025 huggingface dataset:
The Metabolic Syndrome: Comparison of Newly Proposed IDF, Modified ATP III and WHO Criteria and their Agreements
Authors: Mainuddin AKM , Choudhury KN , Ahmed KR , Akter S , Islam N , Masud JHB
Published: August 2013

Background: Metabolic syndrome (MS) results from clustering of cardiovascular risk factors occurring in association with insulin resistance and obesity. With the increasing prevalence of obesity worldwide, MS is of keen interest in research. The disorder is defined in various ways, but one consolidated definition is needed to make studies comparable worldwide. The study was to determine the risk factors of metabolic syndrome in Bangladesh and comparison of newly proposed definition of International Diabetes Federation (IDF), modified National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III) and the World Health Organization (WHO) criteria and their agreements. Materials and Methods: This was a cross sectional hospital based study. We randomly selected 229 participants. After obtaining informed written consent data collectors collected data by interview, clinical examination, anthropometric measurement and investigations. We calculated independent sample t-test means between to distinguish which risk factors were present in participants with and without MS, using SPSS v17. Results: The percentage of risk factors of MS among subjects according to different criteria was 72% of Modified ATP-III, 69% of IDF and 39% of WHO definition .In Modified NCEP ATP III when did independent sample t-test mean of BMI, waist circumference, systolic blood pressure, diastolic blood pressure, fasting blood glucose, high density lipoprotein and triglyceride were present statistically significant difference between without MS and with MS (p<0.05). According to WHO criteria BMI, waist circumference, fasting blood glucose were statistically significant (p<0.05) and similarly fasting blood glucose & triglyceride were statistically significant difference between without MS and with MS (p<0.05) according to IDF criteria.ATP III and WHO criteria showed good agreement (k 0.56) compared to ATP III with IDF (k 0.31) and WHO with IDF (k 0.11) criteria. Conclusion: Metabolic syndrome is highly prevalent in Bangladesh. We detected the highest proportion of participants with MS using the ATP III definition, which emphasizes the predominant focus on the modified waist circumference for Asian participants. However, MS prevalence following WHO criteria in those with impaired glucose regulation is comparable with ATP III definition. Follow up study needed to examine the significance of MS following all definitions for the assessment of risk for diabetes and or cardiovascular disease. Cardiovascular Journal Volume 6, No. 1, 2013, Page 17-22 DOI: http://dx.doi.org/10.3329/cardio.v6i1.16110
A New Concept in Relation to Blood Biochemical Parameters with Myocardial Infarction in Bangladeshi Population
Authors: Zareen Salma , Badiuzzaman M , Uddin SN , Choudhury K , Saha SK
Published: August 2013

Background : Blood testing for biochemical markers of Myocardial injury plays an increasingly important role for the evaluation, diagnosis and triage of patients with chest pain. The guidelines for the diagnosis of Myocardial Infarction ((MI) have recently changed and prominently incorporate the results of cardiac marker testing in the clinical definition of MI. We investigated these updated biomarkers and further compare the differing biology and release kinetics of clinically relevant biomarkers. Methods: Biochemical changes that occurred in the blood of acute myocardial infarction (AMI) patients were investigated. Two hundred and fifty two patients, 180 males and 72 females were included in this study. The mean age was 49.3 ± 9.25 years. Biochemical parameters include serum triglyceride, total protein, albumin , total bilirubin and total cholesterol to albumin ratio were analyzed. Results : Biochemical parameters showed that the increased level of triglyceride and total bilirubin were associated with myocardial infarction. Triglyceride and total bilirubin levels in myocardial infarction patients were 2.3 ±1.4 mmol/ L and 12.3±3.2 ?mol/ L respectively, whereas those of healthy controls were 1.7±1.2 mmol/L for triglycerides and 9.7±3.7 ?mol/L for bilirubin. On the other hand, serum total protein and albumin concentrations were lower in MI patients compared to those of controls. Total protein level was 65.5 ±3.1 g/L in MI patients and 76.2±5.3 g/L in healthy controls. Albumin levels in both patients and controls were 40.2 ±3.2 g/L and 45.4 ± 4.5 g/L correspondingly. Conclusion : Interestingly, serum total cholesterol level was not significantly different in MI patients compared to controls. In addition, cholesterol/albumin ratio in myocardial infarction patients (0.14 ± 0.04) found to be significantly higher than in healthy controls (0.11± 0.03). Cardiovascular Journal Volume 6, No. 1, 2013, Page 43-46 DOI: http://dx.doi.org/10.3329/cardio.v6i1.16114
Reuse of Cardiac Rhythm Control Devices: A Review
Authors: Islam AKM Monwarul , Ullah M , Khan US , Majumder AAS
Published: August 2013

Cardiac rhythm control devices i.e. pacemakers, implantable cardioverter-defibrillators (ICDs) and biventricular pacemakers are at times lifesaving treatment and prevention of arrhythmia. But, despite definite indications, many people in the developing countries cannot afford these devices due to high cost, and succumb to premature death. On the other hand, after implantation, pacemakers and ICDs are sometimes underutilized because of premature explantation due to death of the recipient, device infection, or upgradation, leaving a considerable extent of serviceable battery life unused. Majority of these explanted devices are simply thrown away. Though made for single use, a growing body of evidence indicates the safety, efficacy and feasibility of reimplantation of the prematurely explanted devices in patient in need who is otherwise unable to afford a new one. Patients, physicians, morticians, and even the general public support the idea of device donation and recycling. A number of organizations around the world have engaged themselves in this benevolent effort, and t he feasibility of device reutilization programme has already been established. However, some logistic, legal and ethical concerns are yet to be solved. The statutory bodies and professional organizations should address the issue of device recycling to solve the unsolved issues and formulate standard practice guidelines. In that case, such medical wastes may turn into invaluable resources, and help ensuring equitable medical care throughout the world. Cardiovascular Journal Volume 6, No. 1, 2013, Page 52-59 DOI: http://dx.doi.org/10.3329/cardio.v6i1.16116
Drug-Eluting Stent (DES) Induced Coronary Artery Aneurysm - A Case Report
Authors: Choudhury Amal Kumar , Akhtaruzzaman M , Khalequzzaman M , Hasem S , Choudhury TA , Sharafat NI
Published: August 2013

Drug-eluting stents (DES), which locally elute antiproliferative drugs, can dramatically inhibit neointimal growth. However, several pathological studies have indicated that DES may delay healing after vascular injury, and DES implantation may be theoretically associated with a risk of coronary artery aneurysm formation. Coronary aneurysms have been reported from 3 days to up to 4 years after DES implantation procedures, with varying clinical presentations. Mr. X, 60 years old diabetic, hypertensive got admitted in NICVD and was diagnosed as a case of Chronic Stable Angina. His ETT was strongly positive, CAG showed significant long lesion in LAD. Direct stenting with DES to LAD done and whole procedure was uneventful. After 10 days of PCI patient got readmitted in hospital with complaints of chest discomfort with high grade fever for 2 days. ECG showed AMI (Extensive Anterior) indicating involvement of LAD territory with strong suspicion of Sub Acute Stent Thrombosis (SAST). Streptokinase could not be given due to delayed arrival. Patient was treated conservatively with Low Molecular Weight Heparin. Check CAG was done 7 days after readmission showing Patent stent in LAD with aneurysmal dilatation at the distal end of stent in LAD. The objective of this case report is to focus on the rare but not uncommon incidence of stent implantation. Cardiovascular Journal Volume 6, No. 1, 2013, Page 63-67 DOI: http://dx.doi.org/10.3329/cardio.v6i1.16118
Right Atrial Thrombus Mimicking Myxoma with Subclinical Pulmonary Embolism
Authors: Artemiou Panagiotis , Lukacin S , Bily B
Published: August 2013

Cardiovascular Journal Volume 6, No. 1, 2013, Page 71-73 DOI: http://dx.doi.org/10.3329/cardio.v6i1.16120
Notes on Critical Assessment of Theoretical Calculations of Atomic Structure and Transition Probabilities
Authors: Chung Hyun-Kyung , Jönsson Per , Kramida Alexander
Published: August 2013

Atomic structure and transition probabilities are fundamental physical data required in many fields of science and technology. Atomic physics codes are freely available to other community users to generate atomic data for their interest, but the quality of these data is rarely verified. This special issue addresses estimation of uncertainties in atomic structure and transition probability calculations, and discusses methods and strategies to assess and ensure the quality of theoretical atomic data.
Comparison of the Experimental and Numerical Results of Modelling a 32-Oscillating Water Column (OWC), V-Shaped Floating Wave Energy Converter
Authors: Kelly Thomas , Dooley Thomas , Campbell John , Ringwood John
Published: August 2013

Combining offshore wind and wave energy converting apparatuses presents a number of potentially advantageous synergies. To facilitate the development of a proposed floating platform combining these two technologies, proof of concept scale model testing on the wave energy converting component of this platform has been conducted. The wave energy component is based on the well-established concept of the oscillating water column. A numerical model of this component has been developed in the frequency domain, and the work presented here concerns the results of this modelling and testing. The results of both are compared to assess the validity and usefulness of the numerical model.
Effects of Impermeable Boundaries on Gas Production from Hydrate Accumulations in the Shenhu Area of the South China Sea
Authors: Li Gang , Li Xiao-Sen , Zhang Keni , Li Bo , Zhang Yu
Published: August 2013

Based on currently available data from site measurements and the preliminary estimates of the gas production potential from the hydrate accumulations at the SH7 site in the Shenhu Area using the depressurization method with a single horizontal well placed in the middle of the Hydrate-Bearing Layer (HBL), the dependence of production performance on the permeabilities of the overburden (OB) and underburden (UB) layers was investigated in this modeling study. The simulation results indicated that the temperature and the pressure of the HBL were affected by the permeabilities of OB and UB and the effect of depressurization with impermeable OB and UB was significantly stronger than that with permeable boundaries. Considering the percentage of hydrate dissociation, the gas production rate and the gas-to-water ratio, the hydrate deposit with impermeable OB and UB was expected to be the potential gas production target.
Communication by Mothers with Breast Cancer or Melanoma with Their Children
Authors: Gaber Rikki , Desai Sapna , Smith Maureen , Eilers Steve , Blatt Hanz , Guevara Yanina , Robinson June
Published: August 2013

Communication of familial risk of breast cancer and melanoma has the potential to educate relatives about their risk, and may also motivate them to engage in prevention and early detection practices. With the Health Insurance Portability and Accountability Act (HIPAA) privacy laws, the patient often becomes the sole communicator of such risks to family members. This study surveys mothers diagnosed with either breast cancer or melanoma and their adult children about their family communication style, knowledge of increased risk, and early detection practices. In both cancer groups, most mothers alerted their children of the risk and need for early detection practices. Breast cancer mothers communicated risk and secondary prevention with early detection by breast self-examination and mammograms whereas the melanoma mothers communicated risk and primary prevention strategies like applying sunscreen and avoiding deliberate tanning. Open communication about health matters significantly increased the likelihood that children engaged in early detection and/or primary prevention behaviors. Examining the information conveyed to at-risk family members, and whether such information motivated them to engage in early detection/prevention behaviors, is key to guiding better cancer prevention communication between doctors and patients.
Influence of Genetic Variations on Levels of Inflammatory Markers of Healthy Subjects at Baseline and One Week after Clopidogrel Therapy; Results of a Preliminary Study
Authors: Shahabi Payman , Siest Gérard , Herbeth Bernard , Lambert Daniel , Masson Christine , Hulot Jean-Sébastien , Bertil Sébastien , Gaussem Pascale , Visvikis-Siest Sophie
Published: August 2013

We aimed to assess the association between the most common polymorphisms of cytochrome P450 (CYP) epoxygenases on the plasma levels of inflammatory markers in a population of healthy subjects. We also sought to determine whether CYP2C19*2 polymorphism is associated with the anti-inflammatory response to clopidogrel. In a population of 49 healthy young males, the baseline plasma levels of inflammatory markers including C-reactive protein, haptoglobin, orosomucoid acid, CD-40 were compared in carriers vs. non-carriers of the most frequent CYP epoxygenase polymorphisms: CYP2C9*2, CYP2C9*3, CYP2C19*2, CYP2C8*2 and CYP2J2*7. Also, the variation of inflammatory markers from baseline to 7 days after administration of 75 mg per day of clopidogrel were compared in carriers vs. non-carriers of CYP2C19* allele and also in responders vs. hypo-responders to clopidogrel, determined by platelet reactivity tests. There was no significant association between epoxygenase polymorphisms and the baseline levels of inflammatory markers. Likewise, CYP2C19* allele was not associated with anti-inflammatory response to clopidogrel. Our findings did not support the notion that the genetic variations of CYP epoxygenases are associated with the level of inflammatory markers. Moreover, our results did not support the hypothesis that CYP2C19*2 polymorphism is associated with the variability in response to the anti-inflammatory properties of clopidogrel.
A Nitric Oxide-Responsive Quorum Sensing Circuit in Vibrio harveyi Regulates Flagella Production and Biofilm Formation
Authors: Henares Bernadette , Xu Yueming , Boon Elizabeth
Published: August 2013

Cell signaling plays an important role in the survival of bacterial colonies. They use small molecules to coordinate gene expression in a cell density dependent manner. This process, known as quorum sensing, helps bacteria regulate diverse functions such as bioluminescence, biofilm formation and virulence. In Vibrio harveyi, a bioluminescent marine bacterium, four parallel quorum-sensing systems have been identified to regulate light production. We have previously reported that nitric oxide (NO), through the H-NOX/HqsK quorum sensing pathway contributes to light production in V. harveyi through the LuxU/LuxO/LuxR quorum sensing pathway. In this study, we show that nitric oxide (NO) also regulates flagellar production and enhances biofilm formation. Our data suggest that V. harveyi is capable of switching between lifestyles to be able to adapt to changes in the environment.
Thermal Fatigue Behavior of Air-Plasma Sprayed Thermal Barrier Coating with Bond Coat Species in Cyclic Thermal Exposure
Authors: Lu Zhe , Myoung Sang-Won , Jung Yeon-Gil , Balakrishnan Govindasamy , Lee Jeongseung , Paik Ungyu
Published: August 2013

The effects of the bond coat species on the delamination or fracture behavior in thermal barrier coatings (TBCs) was investigated using the yclic thermal fatigue and thermal-shock tests. The interface microstructures of each TBC showed a good condition without cracking or delamination after flame thermal fatigue (FTF) for 1429 cycles. The TBC with the bond coat prepared by the air-plasma spray (APS) method showed a good condition at the interface between the top and bond coats after cyclic furnace thermal fatigue (CFTF) for 1429 cycles, whereas the TBCs with the bond coats prepared by the high-velocity oxygen fuel (HVOF) and low-pressure plasma spray (LPPS) methods showed a partial cracking (and/or delamination) and a delamination after 780 cycles, respectively. The TBCs with the bond coats prepared by the APS, HVOF and LPPS methods were fully delaminated (>50%) after 159, 36, and 46 cycles, respectively, during the thermal-shock tests. The TGO thickness in the TBCs was strongly dependent on the both exposure time and temperature difference tested. The hardness values were found to be increased only after the CFTF, and the TBC with the bond coat prepared by the APS showed the highest adhesive strength before and after the FTF.
The Click Reaction as an Efficient Tool for the Construction of Macrocyclic Structures
Authors: Pasini Dario
Published: August 2013

The Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC, known as the click reaction) is an established tool used for the construction of complex molecular architectures. Given its efficiency it has been widely applied for bioconjugation, polymer and dendrimer synthesis. More recently, this reaction has been utilized for the efficient formation of rigid or shape-persistent, preorganized macrocyclic species. This strategy also allows the installment of useful functionalities, in the form of polar and function-rich 1,2,3-triazole moieties, directly embedded in the macrocyclic structures. This review analyzes the state of the art in this context, and provides some elements of perspective for future applications.
Exploitation of Large Archives of ERS and ENVISAT C-Band SAR Data to Characterize Ground Deformations
Authors: Del Ventisette Chiara , Ciampalini Andrea , Manunta Michele , Calò Fabiana , Paglia Luca , Ardizzone Francesca , Mondini Alessandro , Reichenbach Paola , Mateos Rosa , Bianchini Silvia , Garcia Immaculada , Füsi Balázs , Deák Zsuzsa , Rádi Károly , Graniczny Marek , Kowalski Zbigniew , Piatkowska Anna , Przylucka Maria , Retzo Hugo , Strozzi Tazio , Colombo Davide , Mora Oscar , Sánchez Francisco , Herrera Gerardo , Moretti Sandro , Casagli Nicola , Guzzetti Fausto
Published: August 2013

In the last few years, several advances have been made in the use of radar images to detect, map and monitor ground deformations. DInSAR (Differential Synthetic Aperture Radar Interferometry) and A-DInSAR/PSI (Advanced DInSAR/Persistent Scatterers Interferometry) technologies have been successfully applied in the study of deformation phenomena induced by, for example, active tectonics, volcanic activity, ground water exploitation, mining, and landslides, both at local and regional scales. In this paper, the existing European Space Agency (ESA) archives (acquired as part of the FP7-DORIS project), which were collected by the ERS-1/2 and ENVISAT satellites operating in the microwave C-band, were analyzed and exploited to understand the dynamics of landslide and subsidence phenomena. In particular, this paper presents the results obtained as part of the FP7-DORIS project to demonstrate that the full exploitation of very long deformation time series (more than 15 years) can play a key role in understanding the dynamics of natural and human-induced hazards.
Enhancement of Antitumor Activity by Combination of Tumor Lysate-Pulsed Dendritic Cells and Celecoxib in a Rat Glioma Model
Authors: Zhang Hongtao , Tian Miao , Xiu Chunming , Wang Yunbo , Tang Guotai
Published: August 2013

Using dendritic cell (DC)-based vaccines for treatment of gliomas has emerged as a meaningful and feasible treatment approach for inducing long-term survival, but this approach so far has failed to generate significant clinical responses. In the present study, we demonstrated that glioma
lysate-pulsed DCs in combination with celecoxib, a selective cyclooxygenase 2 (COX-2) inhibitor, showed more significantly enhanced antitumor activity with increased apoptosis of tumor cells, reduced neovascularization, and developed a strong cytotoxic T lymphocyte (CTL) response in tumor-bearing
rats. Celecoxib may reduce production of prostaglandin E2 and modulate the balance between T helper 1 (Th1) cytokines and T helper 2 (Th2) cytokines by increasing the pivotal Th1 cytokine interleukin-12 and reducing Th2 cytokine interleukin-10. Taken together, our results demonstrated that
selective inhibition of COX-2 using celecoxib combined with DC-based immunotherapy could act as an important novel strategy for improving future treatment of malignant gliomas.
BTG2 Overexpression Increases the Radiosensitivity of Breast Cancer Cells In Vitro and In Vivo
Authors: Hu Xudong , Xing Ligang , Jiao Yang , Xu Jiaying , Wang Xingwu , Han Anqin , Yu Jinming
Published: August 2013

Antiproliferative gene B-cell translocation gene, member 2 (BTG2) is a member of the BTG/TOB antiproliferative gene family. In this study, we investigated the effect of BTG2 gene overexpression on the radiosensitivity of breast cancer cells in vitro and in vivo. Results show
that in human breast cancer cell line MCF-7 stably overexpressing BTG2 gene, cell sensitivity to ionizing radiation increased. The MCF-7-BTG2 cells were more susceptible to radiation-caused apoptosis with decreased cyclin B1, cyclin D1, Ku70, FEN-1, and XRCC1 protein expression as well as
increased BAX protein expression. The findings indicate for the first time that BTG2 can improve the radiosensitivity of breast cancer cells by affecting cell cycle distribution, enhancing radiation-induced apoptosis, and inhibiting DNA repair-related protein expression.
Inhibition of Tumor Growth and Alteration of Associated Macrophage Cell Type by an HO-1 Inhibitor in Breast Carcinoma-Bearing Mice
Authors: Deng Rui , Wang Shi-Min , Yin Tao , Ye Ting-Hong , Shen Guo-Bo , Li Ling , Zhao Jing-Yi , Sang Ya-Xiong , Duan Xiao-Gang , Wei Yu-Quan
Published: August 2013

Heme oxygenase-1 [HO-1, also called heat shot protein 32 (HSP32)] can specifically metabolize heme to carbon monoxide, biliverdin, and ferrous iron and plays an important role in the processes of anti-inflammation, tissue protection, and antioxidative stress reaction. It has been reported
that HO-1 can promote tumorigenesis and metastasis of many tumors. However, the detailed mechanisms of how HO-1 affects tumor progress are not clear. Here, we used ZnPPIX (a specific inhibitor of HO-1) to evaluate its potential effects on mouse breast cancer and tumor-associated macrophages
(TAMs). We found out that mouse 4T1 breast cancer growth can be effectively suppressed through inhibition of HO-1 in vitro and in vivo. Moreover, in the 4T1 mouse model, when HO-1 was suppressed in TAMs, alternatively activated macrophages (M2 type) switched to classically activated macrophages
(M1 type). In conclusion, 4T1 breast cancer growth was modulated by HO-1 expression. Furthermore, inhibition of HO-1 may induce tumor-associated immune response by activating TAMs' alternative proliferation. These data suggest that HO-1 may be an important target of breast cancer treatment.
Structural and Temporal Variation in Genetic Diversity of European Spring Two‐Row Barley Cultivars and Association Mapping of Quantitative Traits
Authors: Tondelli Alessandro , Xu Xin , Moragues Marc , Sharma Rajiv , Schnaithmann Florian , Ingvardsen Christina , Manninen Outi , Comadran Jordi , Russell Joanne , Waugh Robbie , Schulman Alan H. , Pillen Klaus , Rasmussen Søren K. , Kilian Benjamin , Cattivelli Luigi , Thomas William T. B. , Flavell Andrew J.
Published: August 2013

Two hundred sixteen barley (Hordeum vulgare L.) cultivars were selected to represent the diversity and history of European spring two‐row barley breeding and to search for alleles controlling agronomic traits by association genetics. The germplasm was genotyped with 7864 gene‐based single nucleotide polymorphism markers and corresponding field trial trait data relating to growth and straw strength were obtained at multiple European sites. Analysis of the marker data by statistical population genetics approaches revealed two important trends in the genetic diversity of European two‐row spring barley, namely, i) directional selection for approximately 14% of total genetic variation of the population in the last approximately 50 yr and ii) highly uneven genomic distribution of genetic diversity. Association analysis of the phenotypic and genotypic data identified multiple loci affecting the traits investigated, some of which co‐map with selected regions. Collectively, these data show that the genetic makeup of European two‐row spring barley is evolving under breeder selection, with signs of extinction of diversity in some genomic regions, suggesting that “breeding the best with the best” is leading towards fixation of some breeder targets. Nevertheless, modern germplasm also retains many regions of high diversity, suggesting that site‐specific genetic approaches for allele identification and crop improvement such as association genetics are likely to be successful.
Performance analysis in equestrian sport
Authors: Williams J.
Published: August 2013

The use of performance analysis is commonplace throughout competitive sports, however, uptake is limited within equestrianism. This review considers the potential for wider implementation of performance analysis techniques within equine sports via contextualisation to showjumping: the horse, rider and the horse and rider dyad. There appears to be limited research available to underpin evaluation of the multiple facets that comprise competitive success in showjumping, with biomechanical evaluation of the jumping phases most established. This presents opportunities for collaboration between the equine industry, researchers and performance analysts to expand knowledge of what contributes to success for horse and rider partnerships in all equine disciplines.
Application of Microscale Gas Leak Detection Technology on Small Pressure Vessel
Authors: Wang Shu Hao , Zhang Wei Min , Zeng Wei Qin , Qian Tian Yao
Published: August 2013

Based on microscale gases leakage to produce ultrasonic principal, pressure vessels for small leaks can produce ultrasonic signal, determining the design of scheme to extracted container leak of weak signal, and analyze the signal, it can provide the method of using ultrasonic testing for tank leakage based on basic theory experiment, and presents the system design scheme of the system consists of hardware and software, used for data collection and analysis processing respectively, in order to realize the function of estimating of the microscale gas leakage.
Search and Doubts of the Calculation Equation of Efficiency Transmission of CLS-II Type Efficiency Transmission Gear Experiment Set
Authors: Zhao Yue
Published: August 2013

t put forward questions for the concept of calculation equation transmission efficiency of CLS-II Type Efficiency Transmission Gear Experiment Set. It put forward questions for the theory and analysis of some works. The analysising and demonstrating aim at the calculation equation problems of transmission efficiency of CLS-II Type Efficiency Transmission Gear Experiment Set. Put forward new mechanics analysis method. And according to the new mechanics analysis method, the analysising and demonstrating aim at the calculation equation of transmission efficiency of CLS-II Type Efficiency Transmission Gear Experiment Set, it gives the new concept of equation of gear transmission efficiency.
Experiment and Research for Calculation of Efficiency Transmission of CHT-100 Type Circulating Power of the Efficiency Transmission Gear Experiment Set
Authors: Zhao Yue
Published: August 2013

According to the conclusion of Doubts of Calculation of Efficiency Transmission of CHT-100 Type Circulating Power of the Efficiency Transmission Gear Experiment Set [, the structure and mechanical analysis of the loader of CHT-100 type circulating power of the efficiency transmission gear experiment set, it gives the new equation of gear transmission efficiency of CHT-100 type circulating power of the efficiency transmission gear experiment set. And through experimental data processing for three different gear transmission efficiency equations of CHT-100 type circulating power of the efficiency transmission gear experiment set, according to the experimental data processing results it proves the correctness of the new equation of gear transmission efficiency of CHT-100 type circulating power of the efficiency transmission gear experiment set.
Research on Composite Powder and Magnet Properties of Bonded NdFeB Magnets Prepared by Press Molding
Authors: Qin Wan Zhong , He Jie
Published: August 2013

The manufacture technology and properties testing method of composite powder and bonded NdFeB magnets from press molding were described in detail. The effects of the content of binder and additives, the molding pressure, the treatment of magnet surface on the mechanical property, processing property, magnetic property and anti-oxidation property of press molding magnets were investigated. Furthermore, the effect mechanism was revealed microcosmically. The press molding bonded magnets was prepared by using the MQP-B rapidly quenching NdFeB magnetic powder and epoxy binder. The magnetic properties are: Br = 0.722 T, Hcb = 457 kA/m, Hci = 718 kA/m, and (BH) max = 83.5 kJ/m3.
Preparation Technology and Mechanical Properties of Fe-C Composites Fabricated by Plasma Activated Sintering
Authors: Liu Gui Wu , Zhou Chong Jian , Zhao San Tuan , Zhang Kuo , Ye Zhi Guo , Qiao Guan Jun
Published: August 2013

The Fe-C composites were fabricated by a combination of high-energy ball milling of Fe-C powder mixtures and plasma activated sintering process. An orthogonal experiment in four factors (including original powder composition, sintering temperature, applied pressure and holding time) and three levels was employed to investigate the effects of preparation technology on mechanical properties (bending strength and hardness) of the Fe-C composite. The experimental results show that the crystalline Fe3C phase can be produced by the rapid sintering process, though it is cannot form theoretically due to the high Gibbs free energy, and more or less holes and composition segregation phenomenon coexist in the composite. The original powder composition plays the leading role in both the mechanical properties of the Fe-C composites. However, the effects of the other parameters on the bending strength and hardness of the composite are somewhat different. The optimal technology combinations for the bending strength and hardness are obtained as follows: 50Fe+50Fe3C/1373 K/400 s/20 MPa and 50Fe+50Fe3C/50 MPa/1273 K/400 s, respectively.
Experimental Study of New Rubber Plastication Method
Authors: Fu Ping
Published: August 2013

At present, the open mill, internal mixer and screw plasticator were used widely in the rubber industry. But they belonged to the intermittent mixing equipments and had shortcomings that could not be avoided. According to these problems, a new experimental platform for rubber mastication was self-made and the optimal process parameters were determined in this paper. Through the massive experiment contrast result, the maximum power dissipation of the block rubber continuous mastication machine was lower than internal mixer when produced the same amount of rubber, specific energy consumption was also lower. And production capacity was 3 times than internal mixer, Mooney stick degrees approached to that of internal mixer. All of these indicated that new rubber mastication experimental platform improved production efficiency and reduced the energy consumption.
Experimental Investigation on Refill Friction Stir Spot Welding Process of Aluminum Alloys
Authors: Yang Hong Gang , Yang Hai Jun
Published: August 2013

With the growing demand for lightweight reduction and environment protection, lightweight materials like aluminum and magnesium alloys have been widely applied in the automotive and aerospace industry. Being a solid state welding process, refill friction stir spot welding (RFSSW) is suitable for spot joining lightweight metals. In the present paper, the mechanical properties and microstructure of the RFSSW joints of 6061-T6 aluminum alloys were investigated. The influence of welding parameters, such as plunge depth, rotating speed and welding time, on tensile-shear strength was conducted through experiments. It is found that the tensile-shear strength is increased with the increase of plunge depth, rotating speed and welding time. And welding time is found to be an important key factor which affects welding quality. Research results can provide guidance for welding parameters optimization and welding quality promotion of RFSSW process of aluminum alloys.
Research on Residual Stress of Engineering Ceramic Grinding Surface
Authors: Liu Wei Xiang
Published: August 2013

As a kind of special hard and brittle engineering materials, in the grinding process, ceramic parts are prone to product cracks which affect seriously on the strength of the parts, and the residual stress is the main reason for cracks producting. Grinding parameters, grinding force and grinding temperature have a certain impact on the residual stress, and the residual stress effects on the fracture strength and fatigue strength of parts. ceramic grinding surface residual stress are caused by the combined effect, like plastic deformation, phase change, the microscopic plastic deformation of the material and the cold burnishing. The residual stress test several methods have X-ray diffraction method, perturbation degree method, indentation fracture. thermal elastic-plastic finite element method can be used to calculate grinding surface residual stress on ceramic and other hard and brittle materials.
Theoretical Study on Reactivity of Fe-Based Oxygen Carrier with CH4 during Chemical Looping Combustion
Authors: Wang Lei , Wu Ling Nan , Dong Chang Qing , Zhang Jun Jiao , Qin Wu
Published: August 2013

The mechanism of interaction between CH4and oxygen carrier surface was studied using density functional theory (DFT) calculations. The adsorption energy of CH4on Fe2O3surface Fe bridge site is the highest, indicating Fe bridge site adsorption is the most stable, and O top site follows. The CH4-Fe2O3surface reaction path was inferred as: (1) the generation of hydroxyl radical, (2) the interaction between hydroxyl radical and CH4with its intermediates in chain, and (3) the generation of H2O and CO2through oxidation. The research will provide guidance for the interaction mechanism between CH4and oxygen carrier surface and the optimization of CLC macroscopic reaction kinetics.
Structure Analysis of the Large Bridge-Craft Using Finite Element Method Based on Properties of Engineering Materials and Mechanical Mechanics
Authors: Qing Shang Le , Chen Yu Lan , Xia Ping
Published: August 2013

The 3D model of 100T bridge-craft was created using Pro/E, and FEM analysis was carried out based on ANSYS. Distribution of stress and deformation was obtained. The results agree with the results obtained by the experiment. And it can be used as a reference for optimizing the bridge-craft structure.
Research on Electric Vehicles with Design of Battery Test System Based on LabVIEW
Authors: Yu Cong , Yao Wei
Published: August 2013

Testing the parameters such as state of charge (SOC), temperature and current of power battery under different running status is very important to adjust control parameters of system in time. A battery test system based on LabVIEW is designed. USBCAN-II produced by ZLG is used to bear the communication tasks of CAN bus. Two AC motors and inverters are used as energy converters and they are mechanical parts of the system. Inverters communicate with PC software via 485 bus. The PC software based on LabVIEW is used to display, store and analysis the error of the data received. After a detailed test, it is shown that the system has the advantages of accurate and rapid detection, reliable operation and outstanding scalability.
Numerical Simulation of Residual Stress Field Induced by Water-Jet Cavitation Peening
Authors: Han Bing , Wang Yan Hua , Xu Chang Liang
Published: August 2013

Water-jet cavitation peening is a new technology for surface modification of metallic materials. Compress residual stress layer is induced by impact wave pressure in the submerged cavitating jets processing. Based on ANSYS/LS-DYNA finite element analysis software, residual stress field in the SAE1070 spring steel material surface induced by cavitate-jet water peening process is simulated, the magnitude and variation rules of the residual stress along the layer depth under different conditions is obtained. In order to verify the correctness of the numerical simulation, the size and distribution of residual stress by the X-ray diffraction method. The results show that the numerical simulation and experimental results are well consistent.
Intelligence Based Control Strategy of Forming Process for Plastic & Rubber Products
Authors: Tao Ping , Wu Qian , Xiao Chao
Published: August 2013

The physical-chemical properties of plastic & rubber products such as rigidity and endurance etc not only are related to the factors of formulations of materials & supplies and structure size etc, but also mainly depend on the control effect of forming process in the vulcanizing phase. Aimed at the puzzle of being difficult to control resulted from uncertainty in vulcanizing phase, the paper proposed a sort of intelligence based control strategy. In the paper, it summed the control puzzle in complex vulcanizing phase, explored the cybernetics characteristic, researched on control strategy of complex process with uncertainty, proposed a sort of intelligence based control strategy, and constructed the control algorithm. The simulation experiment and engineering verification demonstrated that it could be stronger in robustness, and higher in control precision compared with PID controller. The research result shows that it is feasible and effective to the proposed intelligence based control strategy.
Research on the Measuring of the Order of Eco-Industrial Chains for Recycling Waste Material Based on the Theory of Dissipative Structure
Authors: Li Ji Hong , Yu Wei Wei
Published: August 2013

According to the theory of dissipative structure, the orders concept has been introduced to the field of the eco-industrial chains. Based on the study on the relationship between entropy and order-disorder of the eco-industrial chains, the measuring model of its order has been proposed, which has quantificationally investigated the order degree of eco-industrial chains.
The Focusing Mechanism Design for Laser Anti-Counterfeit Platform in Production Manufacturing Engineering
Authors: Tian Rui
Published: August 2013

Focusing mechanism is an important part of zoom lens in production manufacturing engineering, in order to meet the reading and detection of anti-counterfeiting label laser anti-counterfeit platform, this paper presents the principle and method of using linear driving mode focusing and introduces the focusing mechanism which consists of a stepping motor, linear guide rail, rail screw or gear rack, the DSP controller. By contrast test, it verifies the location precision ball screw type focusing mechanism for 0.061 ~ 0.067 mm which higher than the design requirements and it is suitable for use in laser anti-counterfeit authentication system in production manufacturing engineering.
A Hybrid Ant Colony Optimization Algorithm for Permutation Flow-Shop Scheduling in Manufacturing Systems and Industrial Process
Authors: Chen Jing , Zhang Xiao Xia , Ma Yun Yong
Published: August 2013

This paper presents a novel hybrid ant colony optimization approach (ACO&VNS) to solve the permutation flow-shop scheduling problem (PFS) in manufacturing systems and industrial process. The main feature of this hybrid algorithm is to hybridize the solution construction mechanism of the ant colony optimization (ACO) with variable neighborhood search (VNS) which can also be embedded into the ACO algorithm as neighborhood search to improve solutions. Moreover, the hybrid algorithm considers both solution diversification and solution quality. Finally, the experimental results for benchmark PFS instances have shown that the hybrid algorithm is very efficient to solve the permutation flow-shop scheduling in manufacturing engineering compared with the best existing methods in terms of solution quality.
Brief Analysis of Floor Grouting Method in Soft Rock Roadway Based on Engineering Materials and Engineering Mechanics
Authors: Hao Peng Wei , Dong Hai Long , Liu Zhao Hui , Li Jing Pei , Jing Lai Wang
Published: August 2013

Floor grouting in soft rock roadway is one of the effective ways in floor heave control, and this method is being promoted quietly and quickly, but the applying effect is far from satisfied, the reasons are that: the depth of floor grouting is not enough and the influence of water hiding in floor hasnt been attached great importance. This paper analyzed the characteristics of floor broken rock zone in soft rock roadway and pointed out the importance of floor grouting in soft rock roadway, then proposed a practical method of floor grouting. The analysis conclusions show that: the depth of floor broken rock zone that can reach more than 4m is much greater than that of roof broken rock zone due to the double influences of surrounding rock stress and water; the important role of floor grouting in soft rock roadway is draining off free water from broken rock zone in order to strengthen roadway floor; floor grouting includes three important steps: plugging water channels, pumping out free water and grouting in deep holes. The article has revealed common blind spots of floor grouting methods existing, the method this article has noted can solve floor heave of soft rock roadway well, and it has very good application prospects.
Key words: soft rock roadway, floor grouting, broken rock zone, free water in floor
Static Analysis on the Measurement System of an Electronic Belt Scale
Authors: Gan Hong , Chen Kun , Zhong Xing Hong
Published: August 2013

The Principal Purpose of the Present Work is to Investigate the Measurement System of a Direct Loading Electronic Belt Scale with a Single Supporting Roller, Revealing the Relationship between Weight Sensor Output and Vertical as well as Horizontal Force Subjected to Carrier Roller by Means of a Finite Element Software ANSYS. the Results Conclusively Indicate that there is a Good Linear Relationship between the Vertical Force and the Sensor Output while the Output is Independent from the Horizontal One with the Full-Bridge Circuit Applied to Measuring Circuit for Transducer. Variation in Horizontal Force Acting on Carrier Roller is Not a Major Source of Error in the Measurement by a Belt Weigher.
Identification of Toolholder-Spindle Joint Based on Receptance Coupling Substructure Analysis
Authors: Zhai Li Jun , Song Xiao Lei , Cai Li Gang
Published: August 2013

Stiffness identification of toolholder-spindle joint is a basic work for machine tool dynamic research. In this paper, an identification method based on receptance coupling substructure analysis is described. Once the frequency response functions of the toolholder, the spindle and the toolholder-spindle assembly are obtained, the analytical stiffness could be calculated. The method is verified efficiency through dynamic response experiment. Identified stiffness results under different drawbar forces are also discussed.
The Semi-Automatic Drilling Machine for Flange Processing
Authors: Mei Yu Tao , Cheng Guang Zhen
Published: August 2013

This paper designed a semi-automatic drilling machine used in flange hole processing. The drilling machine consists of rotary power head, power head straight reciprocating device, rotary indexing table, positioning clamping device. Rotary power head is driven by the motor, and realize the rotary motion through the gear driving. Power head straight reciprocating device, rotary indexing table, positioning clamping device driven by the hydraulic cylinder, to achieve the semi-automatic of the flange hole processing cooperate with the PLC sequence control function. It has short design cycle, low investment, high efficiency and smooth hydraulic actuator with the generic parts of modular machine tool. Combined with programmable controller to realize the sequence control. And it will be easy to operate, operate reliable and with high efficiency.
The Finite Analysis and Optimization of Gantry Beam on Automatic Welder
Authors: Li Qing Hua , Tang Wu Sheng , Hou Yue Qian
Published: August 2013

Combined with the actual production, the new structure of gantry automatic welder was designed, the gantry beam is the key part of the gantry automatic welder, and the static finite element strength of gantry beam was analyzed on the most dangerous stress position. The maximum stress and the maximum displacement were obtained. Without changing the geometric size of the gantry, the structure of the gantry internal was adjusted to increase its stiffness and strength. Through the finite analysis comparison of the two different stiffeners, better style and distribution form of the stiffener were obtained; the structure of the gantry was optimized. The result shows that the quality of the gantry was reduced by 57%, and the stiffness and strength were improved by 20% and 36%, this provides theory basis for the design and production of gantry welder.
Optimization Design Method for Body Frame of Vehicular Glass Edge Grinding Machine Based on Goal-Driven Optimization
Authors: Hu Jian , Wang Zhan Jin , Duan Bin , Li Gang Yan
Published: August 2013

In the application of the Vehicular Glass Grinding Edge Machine (VGGEM), in order to enhance the body frame rigidity, it is necessary to reduce the maximum body frame deformation by optimizing the body frame cantilever beam cross-sectional size. Considering to this point, a CAD model of the VGGEM is built by using Pro/E, then, further be divided into a simplified grid model by using ANSYS WorkBench. Based on goal-driven optimization method, the grinding wheel load is worked out by using the maximum body frame deformation, and the optimum body frame cantilever beam cross-sectional size is figured out by using the stress distribution of the grinding wheel and the maximum deformation constraints. After the performance analysis of the optimized designed body frame of VGGEM, its rigidity and strength are proved.
Research on Removal Equipment for Industrial Dust Emissions with the Finite Element Method for the Manner of Filter Board and Filter Bag Layout
Authors: Yu Xiao Guang , Chen Jian
Published: August 2013

Filter board is one of the basic technology for the design of removal equipment for industrial dust emissions , it is the key to success for filter design. This paper take PPW64-6 air box pulse bag filter board as the research object, using SimulationXpress finite element analysis software to carry out static analysis for star arrangement and horizontal array filter board,which are two kinds of commonly used bog arrangement in the design of filter board. The analysis results show that the filter bag star-shaped arrangement of filter board has lower steel consumption and area occupation, which provide a basis for air box pulse bag filter plate improvement and the practical engineering design
Study on the Correspondence of Hamiltonian Flows and Functions of Brake Hamiltonian System Based on Mechanical Mechanics
Authors: Sun Da Wei , Liu Jia Rui
Published: August 2013

This paper studies the Hamiltonian flows and functions of the brake Hamiltonian dynamical system. By the properties of the brake Hamiltonian system and the transformation law of Hamiltonian diffeomorphisms, this paper proves the correspondence of the Hamiltonian flows and the symmetrical Hamiltonian functions under some conditions.