bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of Right Marginal Artery in Post Mortem Hearts of Adult Bangladeshi People
Authors: Hossain A , Ara A , Ara S
Published: August 2011

Background: Heart disease is one of the major public health problems in Bangladesh. Treatment of heart disease is costly & complex issue. The study of anatomy of the right marginal artery is essential for the proper diagnosis and treatment of the heart diseases. Materials: The study was carried out in the Department of Anatomy, Dhaka Medical College (DMC), Dhaka from February 2005 to January 2006. Post mortem study of sixty (60) adult human hearts of Bangladeshi people aging from 20 to 75 years was performed. The samples were divided into 3 age groups – Group A (20 to 40 years) consists of 35 males & 7 female, Group B (41 to 60 years) consists of 8 male & 3 female and Group C (61 to 75 years) consists of 7 male. All the samples of different age groups were examined morphologically. Results: In the present study, the right marginal artery was present in 54 and absent in 6, out of 60 samples. Out of 54, the right marginal artery was terminated at the apex in 15 and nearer to the apex in 39 cases. Conclusion: The result of the present study can be helpful to the cardiologists and cardiovascular surgeons for proper anatomical assessment of coronary arteries in patients with heart diseases Key words: Postmortem heart; Coronary arteries; Right marginal artery. DOI: http://dx.doi.org/10.3329/cardio.v1i2.8123 Cardiovasc. j. 2009; 1(2) : 165-168
Atrial Septal Defect (Secundum): A Case Report of a Family
Authors: Fatema NN , Razzaque AKM , Iqbal A
Published: August 2011

Atrial Septal Defect (ASD) Secundum type was detected in a female patient Miss S.A at 20 years of age. She was operated from Birla Heart Research Center, Kolkata India in 1995.She got married after two years. Her son Master Z.S was also diagnosed as ASD secundum and was operated from Narayana Hrudayalaya Institute of Cardiac Science, Bangalore, India in the year 2005 when he was 8 years old. Her daughter was born in the same year and was diagnosed as a case of large ASD secundum (almost common atrium). This girl is now waiting for device closure from Combined Military Hospital (CMH) Dhaka, but her weight is still low for such procedure. This family is a rare family where mother and both children have ASD secundum and possibility of genetic inheritance was strongly suspected which lead to the writing of this report. DOI: http://dx.doi.org/10.3329/cardio.v1i2.8173 Cardiovasc. j. 2009; 1(2) : 226-228
Radiographic evaluation of osteotomized ulnar segments following arthroscopic treatment for canine medial coronoid disease
Authors: Lesser A. S. , Kranz S. T.
Published: August 2011

Objective: To assess movement of ulnar segments radiographically, following proximal and midshaft ulnar osteotomy or ostectomy after arthroscopic treatment for dogs diagnosed with medial coronoid disease.

Methods: Fragmentation and cartilage wear were treated arthroscopically and the presence of incongruity confirmed. Osteotomies were performed at the mid-point or proximal third of the length of the ulna. The distance of separation between the ulnar segments and the adjacent radius were measured and followed by serial radiographs postoperatively until healing had occurred.

Results: Proximal oblique osteotomies located at one-third the length of the ulna were associated with the most movement of the ulnar segments, most notably of the proximal segment. Osteotomies or ostectomies performed in the middle demonstrated less segmental movement and on average, slightly longer time to heal. Movement of the ulnar segments in both groups occurred immediately, and then peaked at two to four weeks postoperatively, tending to plateau thereafter.

Clinical significance: Radioulnar incongruity is considered a facet of the aetiopatho-genesis of canine medial coronoid disease. This creates abnormal loads and focal wear along the medial coronoid process. Performing an oblique osteotomy at a location measured at the proximal third of the length of the ulna allows increased movement of the proximal segment, which may result in unloading of the medial compartment. Performing an osteotomy or ostectomy distally dampens segmental movement due to constraint of the interosseous ligament. These findings suggest that a proximal oblique osteotomy at this location creates immediate favourable movement with low morbidity.
Partial scapulectomy for treatment of an articular fracture of the scapula in a cat
Authors: French S. , Nykamp S. , Ringwood P. B. , Plesman R. L.
Published: August 2011

A seven-month-old cat was referred, after having been missing for one week, for evaluation and treatment of a right forelimb injury and facial fractures. On physical examination, a moderate partial weight-bearing lameness of the right forelimb was present, with palpable crepitus in the glenohumeral joint. Dental radiographs revealed a midline palatal fracture and rostral fractures of the left maxillary canine alveolar bone. Radiographs of the right shoulder revealed a Type III or intraarticular fracture of the scapula with moderate displacement of the fracture at the articular surface. Early fibrous healing of the fracture was observed and the caudal aspect of the medial glenohumeral ligament was ruptured. Due to the chronicity, reduction and stabilization was not attempted. Instead, the caudal aspect of the medial glenohumeral ligament was incised along its origin and approximately 30% of the glenoid was removed. The caudal glenohumeral ligament was attached to the subscapularis muscle. Three years after surgery, the owner reported that the cat continued to experience no visible lameness and led an active lifestyle. This case report demonstrates that a partial caudal scapulectomy can result in full return of function of the forelimbs in cats with scapular fractures, especially when joint involvement is severe and the articular cartilage is affected. To the authors’ knowledge, this is the first report of a partial scapulectomy, utilized for fracture management, in the veterinary literature.
Massive osteolysis in a dog resembling Gorham’s disease in humans
Authors: Lindsay S. , Johnson V. , Child G. , Farrell M.
Published: August 2011

An eight-month-old mixed-breed dog was presented with a history of sudden onset pelvic limb lameness. Radiographic and computed tomographic examinations demonstrated an osteolytic process involving the lumbar spine and pelvis. A comprehensive work-up including serial radiographic skeletal survey, biopsy, routine laboratory investigation and evaluation of parathyroid hormone (PTH) and 25-hydroxy-vitamin D levels failed to reveal any underlying cause for the osteolysis. Conservative treatment using the bisphosphonate drug alendronate and oral analgesic medications resulted in a return to nearly normal long-term function, despite massive lumbar and pelvic osteolysis. The clinical, radiological and histopathological features in this dog are reported, and similarities with the human condition known as Gorham’s disease are discussed.
cml Biology for the Clinician in 2011: Six Impossible Things to Believe before Breakfast on the Way to Cure
Authors: Leber B.
Published: August 2011

Chronic myeloid leukemia (cml) is a model disease in oncology: it is the first human cancer linked to a distinct chromosomal abnormality, ultimately causing constitutive overactivity of a known oncogenic tyrosine kinase that represents a drug target. The introduction of the tyrosine kinase inhibitor imatinib into clinical practice has far exceeded expectations and resurrected hope that the fundamental insights from the “war on cancer” can lead to significant therapeutic advances. Nevertheless, the current perception among clinicians is that imatinib and its newer more potent cousins offer superb long-term disease control for most patients, but that cure without transplantation has remained elusive. However, several important laboratory-based observations over the last few years have changed those perceptions. Several of those developments are discussed here, including direct manipulation of the apoptosis pathway in cancer cells and prevention of disease progression with the use of antioxidants. Intriguing results from a French study indicate that, if disease progression is halted, a small but significant group of patients may be able to stop imatinib therapy without disease recurrence. And for patients whose disease, because of resistant stem cells, needs a more direct attack than tyrosine kinase inhibitors alone, several approaches investigated in laboratory and animal models seem promising, and some are ripe for clinical testing, including inhibitors of Smoothened and 5-lipoxygenase, and suppression of autophagy. Thus, there is realistic hope that true cure of cml, without transplantation, may be a feasible goal in the near future.
A Comprehensive Bone-Health Management Approach for Men with Prostate Cancer Receiving Androgen Deprivation Therapy
Authors: Lee C.E. , Leslie W.D. , Czaykowski P. , Gingerich J. , Geirnaert M. , Lau Y.K.J.
Published: August 2011

For advanced and metastatic prostate cancer, androgen deprivation therapy (adt) is the mainstay of treatment. Awareness of the potential bone-health complications consequent to adt use is increasing. Many studies have shown that prolonged adt leads to significant bone loss and increased fracture risk that negatively affect quality of life. Clinical practice guidelines for preserving bone health in men with prostate cancer on adt vary across Canada. This paper reviews recent studies on bone health in men with prostate cancer receiving adt and the current evidence regarding bone-health monitoring and management in reference to Canadian provincial guidelines. Based on this narrative review, we provide general bone-health management recommendations for men with prostate cancer receiving adt.
Prophylactic Feeding Tubes for Patients with Locally Advanced Head-and-Neck Cancer Undergoing Combined Chemotherapy and Radiotherapy—Systematic Review and Recommendations for Clinical Practice
Authors: Orphanidou C. , Biggs K. , Johnston M.E. , Wright J.R. , Bowman A. , Hotte S.J. , Esau A. , Myers C. , Blunt V. , Lafleur M. , Sheehan B. , Griffin M.A.
Published: August 2011

Goals: This work aimed to determine the benefits and risks of prophylactic feeding tubes for adult patients with squamous cell carcinoma of the head and neck who receive combined chemotherapy and radiotherapy with curative intent and to make recommendations on the use of prophylactic feeding tubes and the provision of adequate nutrition to this patient population. Methods: A national multidisciplinary panel conducted a systematic review of the evidence and formulated recommendations to guide clinical decision-making. The draft evidence summary and recommendations were distributed to clinicians across Canada for their input. Main Results: No randomized controlled trials have directly addressed this question. Evidence from studies in the target population was limited to seven descriptive studies: two with control groups (one prospective, one retrospective) and five without control groups. Results from ten controlled studies in patients treated with radiotherapy alone were also reviewed. Conclusions: The available evidence was insufficient to draw definitive conclusions about the effectiveness of prophylactic feeding tubes in the target patient population or to support an evidence-based practice guideline. After review of the evidence, of guidelines from other groups, and of current clinical practice in Canada, the multidisciplinary panel made consensus-based recommendations regarding comprehensive interdisciplinary clinical care before, during, and after cancer treatment. The recommendations are based on the expert opinion of the panel members and on their understanding of best clinical practice.
Triple-Negative and Basal-Like Breast Cancer: Implications for Oncologists
Authors: Lachapelle J. , Foulkes W.D.
Published: August 2011

Since the start of the 1990s, molecular pathology has been playing an increasingly important role in cancer diagnosis and treatment.[...]
Emerging Trends in the Treatment of Triple-Negative Breast Cancer in Canada: A Survey
Authors: Verma S. , Provencher L. , Dent R.
Published: August 2011

Triple-negative breast cancer (TNBC) has a poor prognosis compared to other subtypes and lacks common therapeutic targets, including HER 2 and the estrogen and progesterone receptors. The clinicopathological heterogeneity of the disease and limited treatment options make clinical management particularly challenging. Here we present the results of a survey of Canadian clinical oncologists regarding treatment of TNBC, and review recent and ongoing clinical research in this area. Our survey results show that the majority of respondents use a combination of anthracyclines-taxanes as adjuvant therapy for early TNBC. For the first-line treatment of metastatic TNBC, most clinicians recommend taxanes, while single agent capecitabine and platinum-based therapies are more common for subsequent lines of therapy. Despite the ongoing development of novel targeted therapies, chemotherapy remains the mainstay of treatment for TNBC.
Consensus-Based Nutritional Recommendations for Patients with Head-And-Neck Cancer
Authors: Isenring E.
Published: August 2011

Patients with head-and-neck cancer constitute one of the diagnostic groups that most commonly experi-ence deterioration of nutrition status.[...]
Novel synthesis of pseudopeptides bearing a difluoromethyl group by Ugi reaction and desulfanylation
Authors: Wu Jingjing , Li Hui , Cao Song
Published: August 2011

Thirteen difluoromethyl-containing pseudopeptides were synthesized by Ugi reaction using the novel building block 2,2-difluoro-2-(phenylthio)acetic acid (2) as one component, followed by removal of the phenylsulfanyl protecting group in the presence of tributyltin hydride and azobisisobutyronitrile.
Study on Properties of Epoxy Resins Modified by Nano-Silica
Authors: Chen Yu Fei , Xiao Yi Yue , Li Shi Xia , Zhang Xu
Published: August 2011

Organic precursor of EP/PU was prepared by epoxy resin which was polyurethane toughened, and then modified epoxy resin adhesive was synthesized using nano-silica as modifier. Microstructure of composite materials was observed by scanning electron microscopy (SEM), the results showed that the inorganic phase had good compatibility in polymer matrix, and polyurethane in epoxy resin have formed the "island structure". The mechanical properties, thermal stability and dielectric loss, dielectric constant of composites were investigated. The results indicated that doping of appropriate amount of nano-silica could improve mechanical property, shear strength and impact strength of 2wt% SiO2/EP-PU were increased 173% and 106.67%, than that of pre-doping of composite, respectively. Thermal decomposition temperature (Td) was increased, Tdof 2wt%SiO2/EP-PU was increased 8.1°C than that of pre-doped of material. Dielectric constant (ε) was as follows: was decreased with the increase of frequency, but increased with the increase of inorganic component, dielectric loss (tanδ) was increased with the increase of frequency and inorganic doping.
Study on the Effects of Porosity and Holes Form on the Energy Conservation of Wall Material
Authors: Ruan Xi Mian , Jin Jian , Chen Qi , Qian Tao , Yao Xu Fang , Chen Yi , Feng Wei
Published: August 2011

In this paper, the form of perforated brick holes under different thermal conductivity were measured. To meet the strength required in the circumstances, as a scientific experiment to find an appropriate form of holes, porosity in order to meet the current rate of energy saving requirements. Experimental results show that the number of holes, size, shape, all affect the size of the thermal conductivity. Finally, several experiments are compared to find a suitable type.
Classification of Coarse Recycled Aggregate Used in Asphalt Concrete
Authors: Zhu Ji Qing , Wu Shao Peng , Zhong Jin Jun , Wang Dong Ming
Published: August 2011

Two classification methods for coarse recycled aggregate used in asphalt concrete were investigated in this paper, respectively classifying by coarse recycled aggregate properties and asphalt concrete properties. When classifying by coarse recycled aggregate properties, coarse recycled aggregate was classified into three types by the apparent specific gravity, water absorption, crushed value, Los Angeles abrasion value and brick content of coarse recycled aggregate. When classifying by asphalt concrete properties, coarse recycled aggregate was used to prepare asphalt concrete; and coarse recycled aggregate was classified into three types by the optimum asphalt content ratio (ROAC), theoretical maximum specific gravity ratio (RTMSG) and indirect tensile strength ratio (RITS) of asphalt concrete containing coarse recycled aggregate. The proposed classification criterions of the two classification methods were respectively given.
New Contents of LEED3.0 and its Significance
Authors: Xiong Jian Xin , Tang Lan , Zhou Xiao Qing
Published: August 2011

LEED is the most authoritative green building appraisal system in the world, which is also the green building appraisal system’s leader in the world. Researching the changes of LEED, can in favor of the development of green building appraisal system in our country. This article through the comparative analysis on the value and content between LEED 2.2 and LEED 3.0 to observe its development, and make brief contrast with Chinese green building appraisal system, the advantages of LEED can make a good reference for our green building appraisal system.
Tribological Performance of 3-(N-mono-n-lurylaminomethyl) quinazolin-4-one as Additive in Liquid Paraffin
Authors: Ouyang Ping , Zhang Xian Ming
Published: August 2011

A heterocyclic derivative of 3-(N-mono-n-lurylaminomethyl) quinazolin-4-one was synthesized and its tribological behavior as an ashless additve without phosphorus and sulphur in liquid paraffin was evaluated using a four-ball tester. On the basis of the experimental results, the novel additive has been found to be quite effective as a potential additive in liquid paraffin. The nature of the film on the rubbed surface was investigated by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS).
Research on Load Analysis and Calculation Method of the Unit Glass Curtain Wall
Authors: Gao Yong Tao , Hu Xiao
Published: August 2011

Due to the applicable installation height, small mass, flexible characteristic, large span, so the unit glass curtain wall (UGCW) could be differ from the glass curtain wall of frame members. Based on the characteristic of UGCW, analysis the load of UGCW and building the formula of static wind load, Earthquake Action, Temperature Function etc. The formula to calculate the load of the unit glass curtain wall (UGCW) is given on the base of analyzing the acting load and the mechanism of force transfer of the UGCW in service condition. Hope to provide some reference for similar designs.
Preparation and Properties of Ageing Resistant Asphalt Binder with Various Anti-Ageing Additives
Authors: Feng Zhen Gang , Yu Jian Ying , Zhang Heng Long , Kuang Dong Liang
Published: August 2011

The modified asphalt binders with various anti-ageing additives, including ultraviolet (UV) absorber, antioxidant and combination of them, were prepared, and the effects of UV absorber contents, antioxidant contents and combination of UV absorber and antioxidant on physical properties and ageing characteristics of the asphalt binder were investigated. Results show that the ductility of asphalt binder increases whereas the softening point and viscosity decrease with addition of anti-ageing additives. UV absorbers and antioxidants exhibit different influences on the ageing properties of asphalt binder. The thermal- and photo-oxidative ageing performance of asphalt binder can be simultaneously improved by the compound modification with UV absorber and antioxidant. The combination of UV326 and antioxidant 1010 shows synergistic effect in preventing the asphalt binder from thermal- and photo-oxidative ageing, which contributes to excellent ageing resistance of modified asphalt binder.
Effect of Rejuvenators on Performance of Recycled Hot Mix Asphalt Mixtures
Authors: Kuang Dong Liang , Feng Zhen Gang , Zhang Heng Long , Yu Jian Ying
Published: August 2011

Effects of different viscosity rejuvenators on performance of recycled hot mix asphalt (RHMA) mixture were investigated by testing of water stability, fatigue property and rutting resistance. The results indicate that rejuvenator with low viscosity shows more significant influence on the enhancement of fatigue property at high stress ratio and water stability of RHMA mixture than rejuvenator with high viscosity due to its better diffusion ability into aged bitumen. The water stability and fatigue property of RHMA mixture with 15 wt% low viscosity rejuvenator can be close to virgin hot mix asphalt mixture. Compared with rejuvenators of medium and high viscosity, the rutting resistance of RHMA mixture is reduced more obviously by rejuvenator with low viscosity, but still meets the application requirements of RHMA mixture.
Effect of NO on PPS by a New Durability Testing Method for Filter Media
Authors: Mao Ning , Liu Jing Xian , Sun Xi
Published: August 2011

The durability research on the filter media is of great significance. It is necessary to establish a laboratory test method on it in practical use. A new testing method is provided for filter media durability under corrosive gas condition in the paper. PPS is selected as standard testing sample and it is tested in NO gas. Under 1000ppmNO and 200°C condition, both warp strength and weft strength of PPS increase at the beginning and then gradually decrease with duration. The weft change for both strength and elongation is higher than the warp.
Member Stability Calculation and Analysis of the Unit Glass Curtain Wall
Authors: Gao Yong Tao , Hu Xiao
Published: August 2011

The formula to calculate the stability of the unit glass curtain wall (UGCW) is given on the theory of the structure stability is applied to analyze the whole stability of the frame of the UGCW and the calculation formula is provided. Due to the special structure form of the vertical column of the UGCW the formula is given to calculate the critical moment of the vertical column when torsional and flexural buckling occur, and then, the design basis is provided for reasonable and safe design of the UGCW.
The Property Research on Interfacial Modificated Semi-Flexible Pavement Material
Authors: Yang Yan , Huang Shao Long , Ding Qing Jun , Peng Xin Yan
Published: August 2011

Based on shearing test, bending test in low temperature, fatigue test and dynamic modulus test, the text researched the effect on the property of the semi-flexible pavement by a kind of interfacial modifier. The study showed the feasible content of interfacial modifier was 0.4～0.6% . Used 0.4%, the shear strength reached 1.83MPa, flexural strength 6.97MPa, and fatigue-life was over 40000 at 0.2 stress ratio. From interfacial modification, the synthesis property of semi-flexible pavement was especially perfect.
Research on the Impact of Different VG on Electrokinetic Removal of Heavy Metal Wastes
Authors: Liu Jin , Li Dong Wei , Xu Zhong Hui
Published: August 2011

This paper aims to investigate the effects of different VG (voltage gradient) on electrokinetic removal technology, and examine electrode pH, electric conductivity, voltage drop in the sample, electric current, and the electroosmotic flow. It is indicated that with the increase of VG, the electrolytic reaction rate accelerates during the electric removal experiment, which has affected both system current and the pH value & electric conductivity of electrolyte solutions. The higher VG is, the faster the electrolyte solution pH varies；the higher VG is, the faster the electric conductivity changes. Meanwhile the magnitude of electroosmotic flow increases with the increase of the VG.
The Experimental Study on Use of Industrial Wastes in Ceramsite for Construction
Authors: Liu Yi Qiang , Liu Hong Bin , Li Guang
Published: August 2011

Using the industrial wastes such as fly ash, phyllite and ove tails, the light ordinary type and high strength ceramsite are produced based on the different formulations by rotary kiln. The study is totally based on industrial wastes to produce new building materials. It is far-reaching practical significance for sustainable development of environment. Ceramsite is artificial light aggregate, which has the features of big surface area and light density, and widely apply in housing construction，road and bridge engineering etc. It is can place gravel as the main concrete aggregate in building structure to reduce the structural weight, improve the earthquake resistance of building structures, increase safety and durability of the structure. For road pavement, it can increase the wear resistance of the road. For wall materials, it is lightweight, high strength, maintain the temperature, heat insulation and sound insulation. It also used in buildings with its superiority, which has the functions such as fire-resistant, high temperature, anti-radiation.
Preparation and Characterization of PLA /Rice Straw Fiber Composite
Authors: Liao Zhi Fei , Song Guo Lin , Shi Feng , Yin Zhan Song , Yang You , Niu Zhun , Tang Guo Yi
Published: August 2011

The PLA/Rice straw fiber composites with various content ratios were prepared by using an internal mixer and a flatten press. The thermal properties, interface effect and mechanical performance of as-prepared PLA/Rice straw fiber composites were studied by mechanical performance measurement, TG, DSC and SEM technique. It was found that increasing the content of rice straw fiber leads to the decrease of the melting temperature while the improvement of the crystallinity of these composites. Introducing the rice straw fibers into PLA matrix does not result in any enhancement of mechanical property. However, the tensile strength of the composite increases as the content of rice straw fiber increases from 10% to 30%. The interface effect between fibers and PLA was obviously observed by SEM photo. It was thought such an issue could be improved by the addition of appropriate coupling agents into the composites.
The Experimental Study of Permeability Coefficient of Unsaturated Soil
Authors: Liu Cui Ran , He Peng Li , Tong Huai Feng
Published: August 2011

Due to the complexity and variability of unsaturated soil, the permeability property of unsaturated soils is clearly different from that of saturated soil. And because the test equipment is more complex and technical requirements are higher and diachronic cycle is longer, the researches related are slow. Using the triaxial apparatus of unsaturated soil, the direct and indirect experiments to study the permeability coefficient of unsaturated silty clay are done. Test results show that the permeability coefficient of unsaturated soil can be done by the indirect method and direct method. Not only the direct measurements of the permeability coefficient of unsaturated soil are realized through this trial, but also the reliability of indirect method is proved.
The Preparation and Performance of Reticulate Porous Ceramic for Organism Carrier in Sewage Disposal
Authors: Zhou Mei , Zeng Ling Ke , Sun Kui Xiang
Published: August 2011

This work aims preparation cheaper and high performance reticulate porous ceramic (RPC) for organism carrier. The RPC were made from clay by polymeric foam replication process. The X-ray diffraction (XRD) phase analysis indicates that the RPC mainly consist of mullite when sintered at 1350°C. The surface status of different component RPC was observed under scanning electron microscopy (SEM). The bio-film properties of different component and different pore size RPC were evaluated by the removal rates of CODCrand NH3-N. The results show that the RPC had high effectiveness for microorganisms’ adsorption, the removal rates of CODCrand NH3-N are all reach to 90%, and the bio-film effect is related to porosity, pore size and surface status of the RPC, but the porosity and pore size play more important role than the surface status of these carriers in bio-film process, the RPC carriers with more porosity and suitable pore size achieve better sewage treatment effect.
Excavation and Shaping of Distinctive Elements in Landscape Planning of Modern Urban Waterfront
Authors: Chen Qun , Ye Yan Bing , Ma Li Jin
Published: August 2011

Urban waterfront is a specific space district in the city which denotes the land or construction adjoining rivers, lakes and oceans in the city. With the rising of economic development and people’s higher requirements for the quality of life, urban waterfront has become a distinctive district of city landscape and the window of city’s charm. This paper discusses the excavation and shaping of distinctive elements in landscape planning of modern urban waterfront.
Research on Circumferential Thermal Stress Field of Coke Drum Using ANSYS
Authors: Zhu Rui Tao
Published: August 2011

The paper takes a realistic coke drum as an example. A finite element analysis model using ANSYS is made, acquired with indirect coupling method, and circumferential thermal stress field of coke drum is calculated. Especially, the boundary conditions are based on the measured data of the realistic coke drum. Then circumferential thermal stress field of coke drum is calculated. The calculation results indicate that the circumferential temperature difference with the same height has little impact to stress of the drum and the circumferential temperature difference has the most important effect on coke drum skirt, so the impact to circumferential cracking of the skirt weld cannot be neglected.
Influence of Different Dispersants on the Dispersion Property of Nano-Aluminium Powders
Authors: Song Ling Li , Zhang Ren Yuan , Mao Ling Bo , Zhu Wen Jie , Zheng Miao Yan
Published: August 2011

The influences of dispersant type, supersonic time and concentration on the dispersion property of the nano-aluminium powders in glycol water were systematically studied by using Sodium dodecyl sulfate (SDS)，cetyl trimethyl ammonium bromide (CTAB) and sodium hexa metah posphate（SHMP）as dispersants. During the first stage of the experiments, influences of dispersant type and ultrasonic time with these dispersants were evaluated. The next stage of the study was focused on SHMP concentration. The influence of SHMP concentration was assessed. The results show that with the increasing of ultrasonic time, the dispersion property of nano-aluminum powders first increases and then decreases, and SHMP is the best one. The excellent dispersing condition on the dispersion property of nano-aluminium is: 5g/L SHMP and 50 min ultrasonic vibration.
Assessment of the Material Loss in Walls Renderings with β-Hemihydrate Paste
Authors: Camarini Gladis , Pimentel Lia Lorena , De Sá Natalia Haluska Rodrigues
Published: August 2011

In civil construction, β-hemihydrate pastes have been used as decorative ornaments, plasterboards, dry-wall and renderings. The application procedure of β-hemihydrate pastes for rendering generates large amounts of waste due to its hydration kinetics. Waste production also occurs due to the technique of preparation and application of this material. It is essential to minimize gypsum waste. The aim of this work was to quantify the amount of gypsum waste produced by the process of using it as renderings. It was observed the influence of workers applying pastes rendering on gypsum waste production. The application process of plaster renderings was followed measuring the waste generated and the time for finishing the process was also observed. Results pointed out waste production values in the range between 16% and 47%. The application technique influences the amount of waste production.
Experimental Study on Tensile Parameters of Carbon Fiber Composite Laminated Plate under Bending
Authors: Wu Ya Ping , Wang Yin Hui , Shi Qi , Zha Zhi Xiang
Published: August 2011

To investigate the tensile parameters of carbon fiber composite laminated plate under bending, the three point bending tests of carbon fiber composite laminated plate with two kinds of layer's were carried out in this paper. The result indicated that tensile parameters obtained from the bending tests are usually higher than those from the standard tensile test, which should be considered on the design of composite laminated plate withstanding the bending stress. For composite laminated plate, the bending test results are relative to layer angle and order (e.g. according to the test results, for laminated plates, the difference between values of tensile parameters obtained from the bending tests and those from the standard tensile test is relative small, while for laminated plates the difference is relative bigger). Compared with the method of standard tensile test, the method of three point bending tests may be more appropriate for the composite laminated plate withstanding the bending stress.
An Experimental Study on the Chloride Penetration Resistance of Recycled Aggregate Concrete
Authors: Ding Jian Jiang , Zheng Jian Jun , Lei Ting , Kong De Yu
Published: August 2011

The degradation of reinforced concrete structures due to chloride penetration has a significant influence on structural durability. In this study, an experiment is conducted to investigate the effects of the aggregate type, mixing method, and admixture type on the chloride penetration resistance of concrete. Based on the experimental results, it is found that, since more pores and microcracks are included in recycled aggregates, the chloride penetration resistance of recycled aggregate concrete is larger than that of natural aggregate concrete. Slag is more efficient than fly ash in increasing the chloride penetration resistance of recycled aggregate concrete. It is also found that the mixing method has a significant influence on the chloride penetration resistance of recycled aggregate concrete. These conclusions can provide theoretical evidence for the design optimization of recycled aggregate concrete properties.
Study on the Effects of Different Water-Cement Ratios on the Flow Pattern Properties of Cement Grouts
Authors: Yang Zhi Quan , Hou Ke Peng , Guo Ting Ting
Published: August 2011

The article presents an study on the rheological properties of cement grouts with different water-cement ratios of 0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.9,1.0,1.1,1.25,1.0,2.0,5.0 and10.0.It was to investigate different water-cement ratios of cement grouts effecting its flow pattern properties, and thus determinate the conversion point of them among Newtonian fluid, Bingham fluid and Power-law fluid. It confirmed that,when take into accounts of all negative factors possibly affecting the experiment, including asynchronous loading steps, water temperature, apparatus deflection and so on, W/C(water-cement ratio) = 0.75 is a inflection point,which Power-law fluid converted into Bingham fluid, while at W/C =1.25 the cement grouts suffered a conversion from Newtonian fluid to Bingham fluid. This research results supplied, improved and expanded the knowledge of the flow pattern properties of cement grouts and conversion condition with different water-cement ratios, and so it has important theory meaning and realistic value and may contributes to the engineering practices.
The Key Technical Analysis on the Hot Dry Rock in Northeast Cold in China
Authors: Zhao Jian Bin , Feng Xiao Yan , Yan Ke Qi , Guo Hui
Published: August 2011

Northeast heat supply is an eternal demand, it would cost tens of thousand of moneys for heat supply, on the other hand, the resource of coal and fossil fuels is non-renewable source of energy, in the future it will be consumed, so it is still a serious problem to solve the winter heat supply. At the same time, the hot dry rock has three essential factors including a huge number, renewable and not polluting the environment, which will open up new ways on heat supply in cold area. Based on its advantages the paper will design a heated system more effective than the technology of shallow ground source heat pump, meanwhile analysis the key technology during exploiting the hot dry rock progress, then the thermal conductivity of rock under high temperature and high pressure and the heat transfer ability between rock and water as well as pipe material and insulation technology, all of which will realize the key technology about the dry-heat rock heating. In conclusion, if the key technology on heated system would be settled, it will bring breakthrough about using the hot dry rock on heated supply in cold areas.
Study on the Treatment of Steel Wastewater with High Turbidimetric by Boron Mud Haydite
Authors: Li Hui , Li Bai Quan , Shao Hong , Zhang Di
Published: August 2011

Boron mud haydite adsorbent which was made of boron mud, bentonite, flyash, saw dust, was applied in treatment of high turbidity wastewater. The removal rate of turbidity was used as the index, and the pH the value, the flow, the filler height, the saw dust content, the size and the processing time were studied. The results showed that the removal rate of turbidity which raw turbidity was 795~820NTU could reach 94% when the pH was 12, the flow was 1200s•L-1, the filler height was 50cm, the size was 4mm, the saw dust content was 40g, and the processing time was 60min.The study provided a new way in the preparation of adsorbent and an application of high turbidimetric wastewater treatment.
The Relation between Ceramsite Concrete and its Sound Absorbing Property
Authors: Jin Xue Li , Luo Xiang Yu , Meng Qing Ling , Zeng Ling Ke
Published: August 2011

To improve the porosity of ceramsite concrete can also improve its sound-absorbing property. In this paper, the expanded perlite, polypropylene fibers and foaming agent were added to improve the porosity of the ceramsite concrete. The results show that these three kinds of raw materials can enhance the sound absorbing properties of samples. The relations between porosity and the sound absorption in different sound frequencies through microstructure analysis were established. The study also found that the polypropylene fiber can improve the strength of materials, on the contrast, expanded perlite and foaming agent can significantly reduce the strength. The mechanisms were analyzed by SEM photos.
The Fractional Diagnosis of Multi-Span Continuous Bridge’s Structural Damage Based on Neural Network and Genetic Algorithm
Authors: Li Shun Guo , Li Hui
Published: August 2011

The natural environmental erosion and human factors such as the impact of traffic accidents, crack propagation, concrete carbonation and etc, make the bridge’s damage more serious. Therefore, the bridge damage diagnosis has become a hot field of bridge engineering issues. This paper put forward the fractional diagnosis method of multi-span bridge structure reflecting the structural cracks and carbonation damage. In this paper, adopting the optimization equivalent method, the finite element model of damaged structure is set up according to the damaging characteristic of multi-span continuous bridge structure. A damage index of strain mode with practical meanings is adopted which can reflect local damage. Basing on this index, fractional-step detection method of structural damage is presented. The first step is to identify the damage region, then locate the detailed damage location and degree; Performance of the proposed damage detection approach is demonstrated with analysis of a multi-span continuous bridge. The result turns up trumps.
Analysis and Prediction for Xiaolangdi Reservoir Sand Blocking Operation Period and Water Level of the Lower Yellow River
Authors: Li Qing An , Liu Han Dong , Zhao Yu Kun
Published: August 2011

Xiaolangdi Reservoir undertakes 90% of the Yellow River runoff and 100% of sediment discharge. To ensure the long-term utilization of Xiaolangdi reservoir is the key to prevent the flood in the lower reaches of the Yellow River. Take Luokou Hydrologic Station located in the lower reaches of the Yellow River as an example, conduct an analysis from the aspects of sediment retaining of Xiaolangdi Reservoir, scouring and deposition condition of river channel in the lower reaches of the Yellow River, water level performance for years of different flow of ten times’ water-sediment regulation, predict on the sand blocking operation period of Xiaolangdi Reservoir, water level of specific flow of river channel in the lower reaches of the Yellow River and scouring and deposition condition of river channel, which has played a reference role for the flood control in the lower reaches of the Yellow River.
Construction and Economic Evaluation of Small Water-Saving Farmland Water Conservancy
Authors: Li Qing An , Liu Han Dong , Zhao Yu Kun
Published: August 2011

Small farmland irrigation and water conservancy facilities form an important part of the county-level agricultural infrastructure and one of the key factors that affect agricultural production. The paper takes the Jiyang County in Shandong Province as a case to explain ways to address water shortage and underdeveloped small farmland irrigation and water conservancy utilizing dedicated investment to construct small water-saving farmland irrigation and water conservancy projects. In the 2011 project, 9 pumping stations will be built and 9 low-pressure pipeline irrigation systems will be deployed, with a total of 6,204m3/h designed pumping capacity and 450KW installed capacity that cover an irrigation area of 18,200mu. After completion of the project, the whole county’s effective irrigation area, water-saving irrigation area, efficient water-saving irrigation area, irrigation water efficiency and the overall grain production capacity will be increased significantly with improved benefits from increased yield, saved land, reduced labor and improved water efficiency. The national economic evaluation shows that the project is feasible. The construction of small water-saving farmland irrigation and water conservancy projects is, to certain extent, typical and universal, and can be referred to by the counties, municipalities and district elsewhere across the country in their respective efforts in small farmland irrigation and water conservancy constructions. Therefore, the project is worth recommending.
Effect Analysis of Temperature in the Large Continuous Rigid Frame Bridge
Authors: Yin Wu , Jiang Hai Bo , Zou Lin Bin , Liu Hong Rui , Zou Jin Hua
Published: August 2011

Thermal stress is a factor of the large bridge structure cracks which can not be ignored. As a continuous rigid frame bridge in a certain period of Guangzhou ring express way the background, using the general finite element program MIDAS/Civil, only considering the load of temperature effect established the original bridge model, reference the China road and bridge design for temperature effect on the bridge numerical analysis. By section temperature difference and system temperature change getting the stress distribution and the stress distribution of section temperature difference and the system of heating section, cooling section and the system temperature gradient linear combinations ,the stress we got will get a large section of the stress to the actual distribution of bridge crack detection have a good agreement . Cooling load combination get the Maximum tensile stress at the bridge span beam bottom and the result exceeds the tensile strength of concrete, it gets most impact to the end of the beam cracks. On the bridge design to consider the temperature effect the conclusion has some certain reference value.
Building the Assessment and Evaluation System of Green Residential Area
Authors: Pan Bing Yu , Liu Ji Peng
Published: August 2011

Through the investigation and analysis, on the basis of the top 10 evaluation index system, we have established a green residential area assessment and evaluation model. From two aspects of partial and comprehensive evaluation, we carries on the reasonable appraisal to planning and design quality and green residential area, so as to promote the healthy development of our green residential area.
The Seepage and Runoff Simulation of Qianjiangping Landslide
Authors: Tian Dong Fang
Published: August 2011

The first impoundment of the Three Gorges Dam reservoir in China started from a water surface elevation of 95 m on June 1, 2003 and reached 135m on June 15, 2003. After that, an intensive rainfall lasted nearly a month, Qianjiangping landslide occurred on the early morning of July 14, 2003 and caused great loss of lives and property. In order to study the influence of impoundment and rainfall, based on the coupling model of runoff and infiltration, the seepage and runoff of the landslide during impoundment and rainfall were simulated. The results show that the toe of slope are immersed because of the change of reservoir water level, the suctions of sliding mass and sliding zone on upper slope are decreased and the runoff occurs because of intensive rainfall. These are inducing factors of the landslide. The results are useful to study instability mechanism of the landslide.
Estimation of Propagation Direction of Earthquake Ground Motion near Ground Surface Based on Array Observation Data
Authors: Yang Zhong Yuan
Published: August 2011

The three-dimensional propagation directions of earthquake ground motion near ground surface are estimated for eight earthquakes. By the NIOM method, three dimension (3-D) oriental angles are resulted in determining the arrival time of an incident wave and a reflectiveed wave. In this study, the estimation method of 3-D propagation directions is developed rationally and confirmed reliably with the independent data of Chiba array in Japan. The propagation directions are equivalent numerically to the geographical position of plural spots in horizontal and vertical, and the theoretical result obtained by the structural model of global horizontal layer velocity.
Study on Seismic Disasters and Flow Slide Models of Tailings Dam
Authors: Pan Jian Ping , Zhu Hong Wei , Wang Sheng Yi
Published: August 2011

Large quantities of mined ore materials are processed annually to obtain the various types of minerals that are essential to industrial processes. At the same time, a lot of tailings held up by tailings dam. Due to its execution simplicity and low cost, upstream tailings disposal has been the most common method used for the surface disposal of tailings produced from processing the mined ore materials. The phreatic surface is higher for upstream-type and loose saturated deposits may be incorporated in mostly zones, so that upstream dams are particularly susceptible to liquefaction and flow slide damage under earthquake. Earthquake disasters of tailings dam are analyzed, the mechanism of flow induced by seismic liquefaction are preliminarily studied, and the flow slide models are researched from four aspects of foundation damage, initial dam damage, sub-dam damage and inner slope sliding damage. It is of great significance to guide the antiseismic design of tailings dam and improve the level of safety management and reduce the mine disaster losses.
Stability Analysis and Evaluation of the Dam Influenced by Bridge Construction
Authors: Meng Mei Li , Han Li Wei , Gao Hai Bin
Published: August 2011

Drilling bored piles foundation has been built in the dam and reservoir because of the highway bridge across the dam. Considering the bridge built, the horizontal and vertical force will be passed and act on the dam base. Based on Bishop method, the stability of the dam was analyzed and results showed that the dam can not satisfied with the slope stability requirements. Therefore, concrete measures for reinforced were put forward in order to remove dangers and reinforce the dam.