bluuebunny/crossref_metadata_2025 huggingface dataset:
Diabetes mellitus related complications in out- patient clinic of tertiary care hospital
Authors: Maskey R , Shakya DR , Sharma SK , Karki P , Lavaju P
Published: August 2012

We tried to explore the demographic profile and complications of the out patients suffering with Diabetes Mellitus (DM). It was hospital based descriptive study conducted among the 100 diabetic out-patients of B.P.Koirala Institute of Health Sciences, Dharan, Nepal during the period of 1-1-2010 to 29-2-2010. Patients above 14 years diagnosed as per ADA guidelines 2009 giving written informed consent were taken. The number of common diabetes related complications were searched and diagnosed clinically with the use of relevant investigations which included macro-vascular complications like ischemic heart disease, peripheral vascular disease, and micro-vascular complications like diabetic retinopathy, diabetic neuropathy, and diabetic nephropathy. Among 100 confirmed cases of diabetes mellitus (51 male and 49 female).Of all diabetes, 99% were type 2, 1% were type1. About 42% subjects were of age group between 40-60 yr. When BMI?23 kg/m2 (as recommended for Asians) is taken as the determining factor for overweight, 29% of patients were overweight, 56% obese and 6% morbid obese. About 83% of subjects were on OHA, 9% on Insulin and 8% on OHA and insulin both. The most common and frequent chronic complications were neuropathy (44.4%) followed by cardiovascular and retinopathy (27.7%), nephropathy (16.6%) and others (11.3%). About 25 % of subjects had hypertension (stage 1 hypertension-17%, and stage 2 hypertension 8%).As most of the patients are overweight with more neurological and cardiovascular complications so the lifestyle changes are required with regular antidiabetics and dietary restriction.Journal of College of Medical Sciences-Nepal, 2011, Vol-7, No-2, 9-16DOI: http://dx.doi.org/10.3126/jcmsn.v7i2.6674
Spontaneous delivery or manual delivery of the placenta during caesarean: A randomized controlled trial
Authors: Pokharel SM
Published: August 2012

The study was done to compare the blood loss and the time between spontaneous delivery and manual removal of the placenta during caesarean section. We prospectively randomized and compared outcomes of 100 gravid women with manual (n=50) and spontaneous (n=50) placental delivery at caesarean section. Blood loss was measured after placental deliverey at caesarean and was greater in the manually delivered group (100.9 ± 22.5 ml) than in the spontaneous delivery group. (55.11 ±21.07 ml) P< 0.001. The mean interval during the delivery of the newborn and the placenta is longer in spontaneous delivery group (62.02 vs. 50.5 seconds), but the mean duration of the operation was similar. Spontaneous delivery of the placenta as compared to manual expression significantly reduces the blood loss without increasing the operating time.Journal of College of Medical Sciences-Nepal, 2011, Vol-7, No-2, 23-28DOI: http://dx.doi.org/10.3126/jcmsn.v7i2.6676
Clinical and socio-economic factors among epileptic patients in Nepal: A big challenge
Authors: Thapa L , Shrestha A , Paudel R , Pokharel BR , Ghimire A , Shilpakar R , Dewan KR , Rana PVS
Published: August 2012

Epilepsy is commonly found neurological disorder in developing countries where huge treatment gap exists. Amongst many etiologies, neuroinfection is found to be prevalent in developing countries. We designed a self-structured goal directed questionnaire and interviewed 20 consecutive patients with epilepsy. We also collected their clinical symptoms and neuroimaging reports. 70% were males. Majority (30%) had neuroinfection (20% neurocysticercosis and 10% meningitis). Eighty percent of patients had a belief on traditional healer. Epilepsy in Nepal still remains a big challenge. Public awareness to reduce infections may help in reducing seizure incidence and prevalence in developing countries like ours.Journal of College of Medical Sciences-Nepal, 2011, Vol-7, No-2, 29-33DOI: http://dx.doi.org/10.3126/jcmsn.v7i2.6677
Unilateral variant brachial plexus
Authors: Sontakke YA , Joshi M , Marathe RR
Published: August 2012

Journal of College of Medical Sciences-Nepal, 2011, Vol-7, No-2, 49-54DOI: http://dx.doi.org/10.3126/jcmsn.v7i2.6681
Hysteroscopy management of adenomyosis causing incomplete surgical abortion
Authors: Deep JP , Dabao X
Published: August 2012

Journal of College of Medical Sciences-Nepal, 2011, Vol-7, No-2, 57-59DOI: http://dx.doi.org/10.3126/jcmsn.v7i2.6685
Knowledge and perception about the Medical Humanities before and after a national workshop
Authors: Shankar PR , Subish P , Paudel R
Published: August 2012

Medical Humanities programs are common in medical schools in developed nations. In Nepal modules have been conducted at Manipal College of Medical Sciences (MCOMS), Pokhara and KIST Medical College (KISTMC), Lalitpur. A workshop was conducted on 26th September 2010 to familiarize participants with MH. Faculty members, medical and nursing students and doctors participated. Pre and post test were administered to study knowledge and perception about MH. Differences in scores among different subgroups of participants and before and after the workshop were explored.The workshop used interactive small group learning strategies to introduce participants to different aspects of MH. Group work, group presentations, facilitator presentations, interpretation of paintings, brainstorming sessions, and role-plays were the main learning modalities used. Participants’ knowledge and perception about MH was studied by noting their agreement with a set of 25 statements using a modified Likert-type scale. Median total scores were compared among different subgroups of respondents and before and after the module.Twenty-three of the 26 participants (88.5%) completed the pre and post-test. Thirteen respondents were male and 10 female. Only three respondents (13%) had been previously exposed to MH. The median total score before the workshop was 85 (maximum possible score 125). The score was higher among male respondents. The median total score after the workshop was 98 and was significantly higher compared to that before the workshop.The workshop was effective in increasing knowledge and perception of participants about MH. A follow up workshop to consolidate the initial gains is required and is being planned.Journal of College of Medical Sciences-Nepal, 2011, Vol-7, No-2, 72-79DOI: http://dx.doi.org/10.3126/jcmsn.v7i2.6688
The role of decompressive craniectomy in cerebral venous sinus thrombosis
Authors: Rajan Vivakaran Thanga Thirupathi , Srinivas Dwarakanath , Kulkarni Girish Baburao , Somanna Sampath
Published: August 2012

Object

Studies on the role of decompressive craniectomy for cerebral venous sinus thrombosis (CVST) in the literature are scanty. Randomized trials face a lot of drawbacks, including ethical issues. In this article the authors discuss their experience with this procedure for CVST and review the available literature.

Methods

This study was a retrospective analysis of all patients who underwent decompressive craniectomy for CVST between August 2006 and June 2008 at the National Institute of Mental Health and Neurosciences. The cases were evaluated for demographic and clinicoradiological features, operative findings, and outcome of surgery. Ethical clearance was obtained from the institutional ethics committee. The data for each patient were obtained from the database of the department. Follow-up data were obtained either through direct clinical evaluation or mailed self-report questionnaire. The Glasgow Outcome Scale (GOS) and the Rankin Disability Scale were used to assess the outcome.

Results

A total of 34 patients (13 men and 21 women) were included; their mean age was 31.6 years, with a range from 18 to 65 years. In univariate analysis, the Glasgow Coma Scale (GCS) score prior to surgery and that in the immediate postoperative period had a statistically significant correlation with poor outcome. The GCS score immediately postoperatively was the only independent, significant predictor of poor outcome on multivariate analysis.

Conclusions

Decompressive craniectomy in a selected cohort of patients had a good outcome in a majority of the patients: 26 of 34 in this study had a GOS score of 4 or 5. In this series, which is the largest in the available literature, the authors review their experience and recommend usage of this procedure in selected patients.
Treatment-related morbidity and the management of pediatric craniopharyngioma
Authors: Clark Aaron J. , Cage Tene A. , Aranda Derick , Parsa Andrew T. , Auguste Kurtis I. , Gupta Nalin
Published: August 2012

Object

Craniopharyngiomas are benign tumors but their close anatomical relationship with critical neurological, endocrine, and vascular structures makes gross-total resection (GTR) with minimal morbidity difficult to achieve. Currently, there is controversy regarding the extent, timing, and modality of treatment for pediatric craniopharyngioma.

Methods

The authors performed a systematic review of the published literature on pediatric craniopharyngioma to determine patterns of clinical practice and the reported outcomes of standard treatment strategies. This yielded 109 studies, which contained data describing extent of resection for a total of 531 patients. Differences in outcome were examined based upon extent of resection and choice of radiation treatment.

Results

Gross-total resection was associated with increased rates of new endocrine dysfunction (OR 5.4, p < 0.001), panhypopituitarism (OR 7.8, p = 0.006), and new neurological deficits (OR 9.9, p = 0.03) compared with biopsy procedures. Subtotal resection (STR) was not associated with an increased rate of new neurological deficits. Gross-total was associated with increased rates of diabetes insipidus (OR 7.7, p = 0.05) compared with the combination of STR and radiotherapy (RT). The addition of RT to STR was associated with increased rates of panhypopituitarism (OR 9.9, p = 0.01) but otherwise similar rates of morbidities.

Conclusions

Although subject to the limitations of a literature review, this report suggests that GTR is associated with increased rates of endocrinopathies compared with STR + RT, and this should be considered when planning goals of surgery.
Clinical and radiological profiles and outcomes in pediatric patients with intracranial aneurysms
Authors: Mehrotra Anant , Nair Anup P. , Das Kuntal Kanti , Srivastava Arun , Sahu Rabi Narayan , Kumar Raj
Published: August 2012

Object

Intracranial aneurysms are extremely uncommon in the pediatric population, their characteristics are not well studied, and certain features make them unique. The authors analyzed pediatric patients with aneurysms to try to understand their clinical, radiological, and outcome profile.

Methods

Sixty-three pediatric patients (≤ 18 years of age) with ages ranging from 4 to 18 years and features (clinical and radiological) suggestive of aneurysm presented to, and were treated at, the authors' center in the past 20 years (1991–2011). Included in the present study were only those patients who underwent surgical intervention, and thus data for 57 patients were analyzed.

Results

Seventy-three aneurysms in 57 patients were surgically treated. There was a slight female predominance (M/F 1:1.2), and the mean age among all patients was 12.69 ± 3.75 years. Fifty patients (87.72%) presented with subarachnoid hemorrhage, 4 (7.02%) with mass effect, and 3 (5.26%) with seizure. On presentation the majority of patients (45 [78.95%]) had a good clinical grade. Eleven patients had multiple aneurysms. The internal carotid artery (ICA) bifurcation was the most common aneurysm site (18 cases [24.66%]), followed by the middle cerebral artery (MCA) bifurcation (11 cases [15.07%]). At a mean follow-up of 18.58 ± 10.71 months (range 1.5–44 months), 44 patients (77.19%) had a favorable outcome, and 5 patients had died.

Conclusions

Pediatric patients with intracranial aneurysms most commonly presented with subarachnoid hemorrhage, and there was a slight female predominance. The ICA bifurcation followed by the MCA bifurcation was the most common aneurysm site. The incidence of posterior circulation and giant aneurysms is higher in pediatric patients than in the adult population. Children tend to present with better clinical grades and have better overall survival results and good functional outcomes.
Research on the Gas Reburning in a Circulating Fluidized Bed (CFB) System Integrated with Biomass Gasification
Authors: Hu Xiaoying , Wang Tao , Dong Zhihui , Zhang Hanfei , Dong Changqing
Published: August 2012

N2O emissions from coal fired fluidized-bed combustion are approximately 30–360 mg/Nm3, much higher than that from pulverized coal combustion (less than 30 mg/Nm3). One approach to reduce the N2O is to reburn the biomass gasification gas in the coal-fired fluidized bed. In this paper, the effects of gasified biomass reburning on the integrated boiler system were investigated by both simulation and experimental methods. The simulation as well as experimental results revealed that the increase of the reburning ratio would decrease the theoretical air volume and boiler efficiency, while it would increase the fuel gas volume, combustion and exhuast gas temperature. The experimental results also indicated that the N2O removal could reach as high as 99% when the heat ratio of biomass gas to coal is 10.5%.
Knowledge, Attitudes, Practices and Biomonitoring of Farmers and Residents Exposed to Pesticides in Brazil
Authors: Oliveira Pasiani Juliana , Torres Priscila , Roniery Silva Juciê , Diniz Bruno Zago , Caldas Eloisa
Published: August 2012

In this study, the knowledge, attitudes and practices regarding pesticide use and the levels of exposure of farmers and residents to organophosphorous and/or carbamates pesticides were evaluated in two rural settings in Brazil. A questionnaire was completed by 112 farm workers aged ≥18 years. Almost all farmers acknowledged that pesticides were potentially harmful to their health (87.5%); however, over half rarely (48.2%) or never (7.2%) used personal protective devices (PPDs). An association was found (p = 0.001) between the work regimen and the use of PPDs, with more frequent equipment use among hired laborers than those involved in family agriculture. A significant correlation (p = 0.027) was found between the reporting of adverse symptoms and the use of backpack sprayers. Mean AChE activities of farmers (n = 64) and residents (n = 18) during the exposure and non-exposure periods were significantly lower than their control groups. Mean BChE activities of farmers and residents were significantly lower than their controls during the exposure period. Among the 60 farmers that had blood samples collected in both the exposure and non-exposure (baseline) periods, 10 (16.7%) had AChE depletion of over 30% during the exposure period compared with the baseline level. Six residents living on the same farms also presented this depletion. AChE was over 30% higher than the baseline level for 19 farmers (31.7%), indicating a reboot effect. Special education programs are needed in these regions to promote the safe use of pesticides in the field to decrease the risks from exposure to pesticides for farmers, and from secondary exposure to these compounds for their families.
2-[3-(Aziridin-1-yl)-2-hydroxypropyl]-5,5-dimethyl-2,5-dihydro-4H-benzo[e]isoindol-4-one (Cytotoxic Oxonaphthalene-Pyrroles, Part III)
Authors: Spreitzer Helmut , Puschmann Christiane
Published: August 2012

An hydroxypropyl-aziridine-containing side chain is attached to an oxonaphthalene-annelated pyrrole in expectation of DNA alkylating properties. The cytotoxicity is evaluated against two cell lines, KB-31 and KB-8511, respectively.
Synthesis and Biological Activity Evaluation of Novel β-Substituted Nitromethylene Neonicotinoid Analogues
Authors: Wang Baozhu , Cheng Jiagao , Xu Zhiping , Xu Xiaoyong , Shao Xusheng , Li Zhong
Published: August 2012

The structure-based design and synthesis of a series of novel neonicotinoid analogues are described. The novel neonicotinoid analogues were designed based upon the reaction of enamine derivatives with electron-withdrawing β-substituents with electrophilic thiocyanogen reagents. These compounds were characterized by spectroscopic methods. Bioassays indicated that some of the synthesized compounds exhibited excellent bioactivity against cowpea aphids (Aphis craccivora). The LC50 values of compounds 7, 9, 12, 13, 15, 17, 19, 20 and commercial imidacloprid were 0.01567, 0.00974, 0.02494, 0.01893, 0.02677, 0.01778, 0.0220, 0.02447 and 0.03502 mmol L−1, respectively, which suggested that they could be used as leads for future development of new insecticides.
A New Cubitane Diterpenoid from the Soft Coral Sinularia crassa
Authors: Cheng Ching-Hsiao , Lin Yun-Sheng , Wen Zhi-Hong , Su Jui-Hsin
Published: August 2012

A new cubitane diterpenoid, crassalone A (1), was isolated from the marine soft coral Sinularia crassa. The structure was determined by extensive spectroscopic analyses. Compound 1 is not cytotoxic (IC50 > 20 μg/mL) toward the four human cancer cell lines tested (HL60, MDA-MB-231, HCT-116 and DLD-1).
Peptide Vaccine Therapy in Colorectal Cancer
Authors: Bartnik Aleksandra , Nirmal Ajit Johnson , Yang Shi-Yu
Published: August 2012

Colorectal cancer is the third most common cause of cancer-related deaths and the second most prevalent (after breast cancer) in the western world. High metastatic relapse rates and severe side effects associated with the adjuvant treatment have urged oncologists and clinicians to find a novel, less toxic therapeutic strategy. Considering the limited success of the past clinical trials involving peptide vaccine therapy to treat colorectal cancer, it is necessary to revise our knowledge of the immune system and its potential use in tackling cancer. This review presents the efforts of the scientific community in the development of peptide vaccine therapy for colorectal cancer. We review recent clinical trials and the strategies for immunologic monitoring of responses to peptide vaccine therapy. We also discuss the mechanisms underlying the therapy and potential molecular targets in colon cancer.
Clinal variation in stomatal characteristics of an Arctic sedge, Eriophorum vaginatum (Cyperaceae)
Authors: Peterson Caitlin A. , Fetcher Ned , McGraw James B. , Bennington Cynthia C.
Published: August 2012

• Premise of the study: In a large reciprocal transplant experiment, Eriophorum vaginatum tussocks transplanted along a latitudinal gradient in Alaska's interior exhibited genetic differentiation and phenotypic plasticity for vegetative traits. Using the same tussocks 30 yr later, we used estimates of growing season temperature at each site to ask whether there was a climatic cline for stomatal density, size, and conductance.

• Methods: We created impressions of the abaxial leaf surfaces of the transplanted individuals for viewing under a microscope and measured stomatal density (SD) and length (SL) for 224 individuals. We used SD and SL to estimate stomatal conductance (C). Separate one‐way analyses of variance were performed to quantify the effect of population genetic differences and latitudinal environmental variation on stomatal characteristics.

• Key results: Our data suggest that stomatal size was influenced by both genetics and environment and that plasticity for stomatal density produced highest densities at the coolest sites. Stomatal conductance increased with decreasing temperature of site from which the populations originated.

• Conclusions: Our results demonstrate a cline in stomatal conductance in E. vaginatum, with some ability of populations to plastically produce an appropriate phenotypic response in a new environment. Because the species is a dominant species in many arctic plant communities, its ability to produce an appropriate stomatal phenotype and to optimize water use efficiency by decreasing stomatal conductance in warmer environments could affect both community composition and total primary productivity in future, warmer climates.
Leaf traits in parental and hybrid species of Sorbus (Rosaceae)
Authors: Ďurkovič Jaroslav , Kardošová Monika , Čaňová Ingrid , Lagaňa Rastislav , Priwitzer Tibor , Chorvát Dušan , Cicák Alojz , Pichler Viliam
Published: August 2012

• Premise of the study: Knowledge of functional leaf traits can provide important insights into the processes structuring plant communities. In the genus Sorbus, the generation of taxonomic novelty through reticulate evolution that gives rise to new microspecies is believed to be driven primarily by a series of interspecific hybridizations among closely related taxa. We tested hypotheses for dispersion of intermediacy across the leaf traits in Sorbus hybrids and for trait linkages with leaf area and specific leaf area.

• Methods: Here, we measured and compared the whole complex of growth, vascular, and ecophysiological leaf traits among parental (Sorbus aria, Sorbus aucuparia, Sorbus chamaemespilus) and natural hybrid (Sorbus montisalpae, Sorbus zuzanae) species growing under field conditions. A recently developed atomic force microscopy technique, PeakForce quantitative nanomechanical mapping, was used to characterize the topography of cell wall surfaces of tracheary elements and to map the reduced Young's modulus of elasticity.

• Key results: Intermediacy was associated predominantly with leaf growth traits, whereas vascular and ecophysiological traits were mainly parental‐like and transgressive phenotypes. Larger‐leaf species tended to have lower modulus of elasticity values for midrib tracheary element cell walls. Leaves with a biomass investment related to a higher specific leaf area had a lower density. Leaf area‐ and length‐normalized theoretical hydraulic conductivity was related to leaf thickness.

• Conclusions: For the whole complex of examined leaf traits, hybrid microspecies were mosaics of parental‐like, intermediate, and transgressive phenotypes. The high proportion of transgressive character expressions found in Sorbus hybrids implies that generation of extreme traits through transgressive segregation played a key role in the speciation process.
Effect of tree size and competition on tension wood production over time in beech plantations and assessing relative gravitropic response with a biomechanical model
Authors: Dassot Mathieu , Fournier Meriem , Ningre François , Constant Thiéry
Published: August 2012

• Premise of the study: Gravitropic movements are unexpected mechanical processes that could disturb tree design allometries derived from the physics of nonliving bodies. We investigated whether the scaling law of gravitropic performance (power of −2 of stem diameter) derived from integrative biomechanical modeling is disturbed by ontogeny or environment, then discuss the silvicultural and dendroecological consequences.

• Methods: In a beech (Fagus sylvatica) plantation, four plots with different initial planting densities evolved without any intervention for 26 yr. Regular tree inventories and a silvicultural model were used to monitor competition over time in each plot. The radial production of tension wood was quantified using a cross‐section of the stems at 1.30‐m height, and an integrative biomechanical model computed the tree gravitropic performance over time.

• Key results: All trees developed tension wood over the whole period, with higher amounts at the youngest age, resulting in theoretical lean corrections of ca. 20–30° on the first 4 m of the stem over the whole period. The scaling law of gravitropic performance is slightly larger than the power of −2 of stem diameter.

• Conclusions: Gravitropic performance in forest ecosystems is mainly limited by size (diameter). Ontogenic acclimation of tension wood formation allows the youngest trees to be more reactive. No additional effect of spacing was found. However, silviculture influences size and, therefore, tree reactivity at a given age. Such results will be helpful for dendroecological approaches that use wood as a marker of environmental disturbances or a trait linked to plant strategies.
A novel asymmetric synthesis of cinacalcet hydrochloride
Authors: Arava Veera R , Gorentla Laxminarasimhulu , Dubey Pramod K
Published: August 2012

A novel route to asymmetric synthesis of cinacalcet hydrochloride by the application of (R)-tert-butanesulfinamide and regioselective N-alkylation of the naphthyl ethyl sulfinamide intermediate is described.
MHD MIXED CONVECTION STAGNATION-POINT FLOW OF A MICROPOLAR FLUID IN A POROUS MEDIUM TOWARDS A HEATED STRETCHING SHEET WITH THERMAL RADIATION
Authors: Pal Dulal , Chatterjee Sewli
Published: August 2012

The present investigation is concerned with the study of heat and mass transfer characteristics on MHD boundary layer flow of an electrically conducting micropolar fluid over a non-isothermal stretching sheet embedded in a porous medium of variable thermal conductivity by applying prescribed heat flux for the heating processes. The thermal boundary layer equation takes into account of Ohmic dissipation due to transverse magnetic and electric fields. The governing system of partial differential equations is transformed into a system of non-linear ordinary differential equations using similarity transformation. The transformed non-linear coupled differential equations are linearized by quasi-linearization method and then solved very efficiently by finite-difference method. Attention has been focused to study the effects of various physical parameters on velocity, temperature and concentration in the boundary layer. Numerical data for the local skin friction coefficient, surface temperature and surface solutal concentration have also been tabulated for various parametric conditions.
ITERATIVE SOLUTION OF THE PRESSURE PROBLEM FOR THE MULTIPHASE FILTRATION
Authors: Vabishchevich Petr , Vasil'eva Maria
Published: August 2012

Applied problems of oil and gas recovery are studied numerically using the mathematical models of multiphase fluid flows in porous media. The basic model includes the continuity equations and the Darcy laws for each phase, as well as the algebraic expression for the sum of saturations. Primary computational algorithms are implemented for such problems using the pressure equation. In this paper, we highlight the basic properties of the pressure problem and discuss the necessity of their fulfillment at the discrete level. The resulting elliptic problem for the pressure equation is characterized by a non-selfadjoint operator. Possibilities of approximate solving the elliptic problem are considered using the iterative methods. Special attention is given to the numerical algorithms for calculating the pressure on parallel computers.
NON-MONOTONE CONVERGENCE SCHEMES
Authors: Dobkevich Maria
Published: August 2012

We consider the second order BVP x″ = f (t, x, x′), x′(a) = A, x′(b) = B provided that there exist α and β (lower and upper functions) such that: β′ (α) < A < α′(a) and β′(b) < B < α′ (b). We consider monotone and non-monotone approximations of solutions to the Neumann problem. The results and examples are provided.
Philosophie de la nature et sciences chez Schopenhauer
Authors: Segala Marco
Published: August 2012

Dans son œuvre, Schopenhauer a discuté en profondeur les sujets scientifiques et a élaboré une philosophie de la nature pour encadrer dans son système les connaissances développées par la recherche scientifique. Cet article analyse la philosophie de la nature de Schopenhauer dans le Monde comme volonté et représentation et ses variations dans la Volonté dans la nature , les Compléments et les Parerga et Paralipomena . On montre que la question du rôle des sciences dans le système du monde comme volonté est centrale dans l’image que Schopenhauer a de la philosophie.
The Test Study to the Changes of Excess Pore Water Pressure during Precast Pile Construction
Authors: Zhao Shu Qing
Published: August 2012

The construct to precast pile in thick clayey soil can cause the accumulation of excess pore water pressure. The high excess pore pressure can make soil, buildings and pipes surrounded have large deflection, even make them injured. Combining with actual projects, this paper presents an in-situ model test on the changes of excess pore water pressure caused by precast pile construct. It is found that the radius of influence range for single pile driven is about 15m，the excess pore water pressure can reach or even exceed the above effective soil pressure, and there are two relatively stable stages.
The Study of the Highway Glare Plate Height under Mixed Traffic
Authors: Yang Chun Feng , Xiao Jin Lin , Sun Ji Shu
Published: August 2012

At present the highway horizontal curve section of Anti-glare panels with a uniform height, through investigation and analysis, the arrangement of the glare effect is not very good ,under mixed traffic, to analyze the reasonableness of the highway glare plate height,the ighway glare plate heigh of the road sightline safety model is set up , the design speed of 60km / h, 80km / h,anti-glare plate height of model is proven。Concluded，In the combinations of different vehicles，anti-glare plate height ranges between 1.15 and 1.65；By contrasting static line of sight and moving-horizon，in thedifferent velocity, when vehicles travel a critical location, vehicle traffic safety start to receive greater impact. Conclusions can be got,first,vehicles travel in the flat curve sections, according to different traffic, adopt different glare height; When the design speed is 60km / h, if central angle is less than 15 °, vehicles which is traveling on the section is safe; When the design speed is 80km / h, if central angle is less than 30°, vehicles which is traveling on the section is safe.
Study on High-Performance Office Buildings
Authors: Ren Juan , Liu Yu
Published: August 2012

Since environmental impacts, economic efficiency and human healthy are crucial issues in the global context now, an increasing professional concern and interest in building performance have emerged in sustainable building field. This article aims to introduce high performance concept into office building industry. Based on demonstrating high-performance building (HPB) and distinguishing office building (OB) features, this article proposes its own high-performance office building (HPOB) definition. Furthermore, the article also identifies the benefits and discusses design principles of HPOB in order to promote HPOB application positively.
Study of Subway Construction Management Mode
Authors: Li Li Xin , Zhang Jie Guan , Zhang Yi Bo
Published: August 2012

From all kinds of project management mode, the characteristics of the model change reason and the opting of our country, the construction of the existing metro management mode has summarized. Domestic existing metro construction management model is divided into four categories, and the various modes of in-depth analysis, analysis of subway construction management mode changes and the reasons for our subway construction management mode selection recommendations.To improve the management level of China's subway construction in order to provide a reference.
Nonlinear Numerical Analysis of SRC-RC Transfer Columns
Authors: Lin Hui , Zou Yun , Chen Yi Xuan , Wan Zhi Wei
Published: August 2012

SRC-RC transfer columns are commonly designed as a transition floor for high-rising buildings to transfer from lower SRC columns to upper RC columns. The mechanical performances are studied in the paper using the finite element software of ABAQUS. Nonlinear numerical analyses are made for SRC-RC transfer columns firstly to obtain the relationship between force and displacement at top of the columns. By comparing the analytical results with experimental ones, it is found that the results from finite element analysis coincide well with experimental ones. So ABAQUS software could be used as a supplementary means to simulate SRC-RC transfer columns mechanical behavior. Then the factors such as steel ratio and axial compression ratio are contrastively analyzed. The results show that axial compression ratio has a greater influence on the bearing capacity and hysteretic performance of the structure, but the steel ratio has less influence. Finally, comparisons between SRC-RC and RC columns are also made to demonstrate the mechanical performance of SRC-RC columns further. Conclusions drawn in the study might be useful in practical engineering design.
Analysis of Construction Safety Features and Assurance Measures for the Runway Expansion Project in Qingyang Airport
Authors: Shi Bao Hua , Ren Wei , Ning Wen Pu , Feng Hui , Cai Long Hua
Published: August 2012

In order to ensure the safety of the runway expansion project in Qingyang airport, the paper conduct an in-depth analysis of construction safety features from the aspects of construction machinery and equipment, intercrossed construction, the construction team, the surrounding environment, and the construction time limit. First of all, measures are taken in terms of the safety regulatory agencies, the responsibility realization, related management systems, safety publicity, and three-level education. Then further measures are taken from the aspects of safety investment, safety facilities, hazardous source identification, and on-site safety management. These measures work together to make the whole project construction process without any security accidents and realize the intended goal.
Numerical Analysis of Passive Microclimatic-Modifying Effects of a Moist Void-Brick Wall
Authors: He Jiang , Liu Kai Qiong
Published: August 2012

As a passive cooling strategy aimed at controlling increased surface temperatures and creating cooler urban environments, a passive evaporative cooling wall constructed of moist void bricks was developed. The wall is capable of absorbing water and allows wind penetration, thus reducing their surface temperatures by means of water evaporation. This paper presents a numerical simulation method to predict and evaluate microclimatic modifying effects (air temperature reduction, ventilation cooling and vapor generation) of the wall in urban locations where installation of the wall is under consideration. This simulation is performed by coupling computational fluid dynamics (CFD) with a 3D-CAD-based thermal simulation tool. Methodology of the coupled simulation was described in this paper. In order to demonstrate the applicability of the proposed simulation method, a case study was performed to predict and evaluate the thermal improvement effect of the wall on thermal comfort at a rest station where the wall was installed. Simulation results show that, in terms of air temperature, airflow, humidity and surface temperature distributions, this simulation method can provide quantitative predictions and evaluations of microclimatic modifying effects resulting from the application of the wall.
Lighting Environment Study on Rural Residential Buildings in Weihe Plain of China
Authors: Liao Xi , Luo Jing , Jiang Yuan , Zhu Yi Ping , Wu Wen Bo
Published: August 2012

As an important index reflecting residential quality, the lighting environment level of residential buildings exerts tremendous influence on both physical and psychological health of residents. Taking a typical rural house in Weihe Plain as example, with indoor lighting environment test, lighting habits of the resident and Ecotect software, the paper studies indoor lighting environment quality of rural residential buildings in Weihe Plain and analyzes the influence of residential buildings' design on lighting environment. The result shows that rural residents in Weihe Plain usually don’t attach due importance to the lighting environment quality of living space, and the design of indoor space goes against effective utilization of natural light. Thus, the paper eventually brings forward a method to consummate the lighting environment of rural residential buildings and explores the buildings’ potential of saving energy by making use of natural light.
Dynamic Response of Bridges to Moving Trains: A Study on Effects of Concrete Creep and Temperature Deformation
Authors: Li Wen Qiu , Zhu Yan , Li Xiao Zhen
Published: August 2012

In this paper, a great deal of research undertaken to study the dynamic responses of a high-speed railway bridge subjected to moving trains. Based on coupling vibration analysis of a rigid frame-continuous bridge, the effect on the kinetic characteristics induced by track irregularities, temperature and creep is discussed. The results show that great changes occur in parameters of trains such as rate of wheel load reduction, the vertical acceleration and the vertical Sperling index when considering the effect of temperature and creep compared with regarding track irregularities only. It is recommended that the combination of track irregularities, temperature and creep is essential to evaluate dynamic feature of train-bridge coupled system for high-speed railways.
Experimental Research of Effect on Carrying Capacity of Normal Section of CFRP-Strengthened Beams for CFRP Debonding
Authors: Liu Ze Jun , Meng Hai Ping
Published: August 2012

By the experiment of 13 RC beam strengthened with CFRP, the paper mainly study the effect on the load carrying capacity of normal section of CFRP-strengthened beams for CFRP debonding. The results show that for the strengthened beams without any anchorage at plate-end, they lost load carrying capacity soon after CFRP debonded and quitted working, or went on carrying load like an ordinary RC beam. Besides, the formula for the effective CFRP strain when CFRP end debonded was proposed. For the strengthened beams with sufficient anchorage at plate-end, the strengthened beams should be simplified as simply supported unbonded concrete member after CFRP debonded. A reduction factor was adopted to modify the ultimate tension strain derived from the planar section assumption. The calculated results of ultimate carrying capacity were in reasonable agreement between the suggested formula and the test results.
Structural Comparison and Project Cost Analysis on Two Kinds of Frame Structures
Authors: Liu Zhong Min , Liu Xue Hua , Ji Jing
Published: August 2012

This article introduces two kinds of frame structure system structure for steel structure and reinforced concrete structure, analyzes the similarities and differences in the structural properties, structural occupied area, time limit for a project, project cost and comprehensive economic benefits and other aspects. The advantages and disadvantages of them are analyzed, and the engineering cost is compared and analyzed. Results show that the steel structure has more the advantage than reinforced concrete structure, and it is development trend of factories and high-rise building in the future.
Analysis and Discussion of the Cold Northern Areas of Rural Residential Energy Efficient Design
Authors: Wu Ya Jun , Wang Xue Ying , Xu Dong
Published: August 2012

In the cold regions of northern China, compared to the urban residential buildings, the rural residential buildings are lack of energy-saving technology, which currently in its infancy, some places even still blank, this does not meet China's energy conservation policy, is not conducive to the sustainable development of the country. For this reason, this paper is focused on rural residential building, starting from environmental analysis and technical measures, analyzed on rural residential energy-saving design, and also make research and discussion in terms of building sitting and planning, shape and layout of the building, building structure and technology.
Calculation Method of Unlimited Passive Earth Pressure on Retaining Wall with Translation Mode
Authors: Yang Qing Guang , Luo Shan Huang , Liu Jie
Published: August 2012

Passive earth pressure brought into play depends on displacement ratio, s/sc ,of retaining wall in site and limit state close. Base on friction angle discount coefficient and differential layer method,an estimating method for unlimited state passive earth pressure is set up for cohesiveless soil retaining wall with translation mode.Study indicates that values of passive earth pressure by method in this paper are lower than by Coulomb earth pressure theory.The difference of passive earth pressure by both methods is magnified with decrease of displacement ratio, s/sc and angle,β ,respectively. The critical angle of soil in here is smaller than Coulomb earth pressure theory and it diminishs with the decrease of displacement ratio, s/sc. Moreover, critical angle will minish with increase of angleβwhen displacement ratio, s/sc ,is immovable.Analytical results also show that action point of passive earth pressure is under 1/3 times height of retaining wall and keep descending with the increase of displacement ratio, s/sc ,and angle,β.
Building Damage Analysis and Research on Reinforcement Measures in Wenchuan Earthquake
Authors: Gao Ming
Published: August 2012

The 5•12 Wenchuan earthquake was in M8.0, Mianyang felt strongly. Majority of the buildings have varied at different degrees of damage, especially in masonry-frame structures, Which reinforcement cost much higher for repairing; The 1200 buildings in Mianyang city or it’s Suburbs were surveyed. The results showed: masonry suffered much heavier damage and masonry-frame of the mixed structure by designing, which damage were significantly lower than without seismic design. Realization of the earthquake will not be collapsed, and after a simple repair it can be used. Buildings that suffered heavy damage which combined with the relevant code requirements and research in the past, adopt specific measures for strengthening the houses.
Research Review on the Temporary Bracing System of Prefabricated Structure
Authors: Ding Ke Wei , Yang Xiao
Published: August 2012

This article reviews the concept and advantages of prefabricated structure, the research status of the temporary bracing of cast-in-situ structure and the temporary bracing of prefabricated structure. Finally, the future of the temporary bracing of the prefabricated structure is also predicted.
Simulation Analysis of a Beam-Slab Floor Structure and Comparison on Project Economy
Authors: Liu Zhong Min , Liu Xue Hua , Ji Jing
Published: August 2012

Combined with the specific project in this paper, the working principle of prestressed high-strength concrete beam and floor system arrangement are presented. The prestressed high-strength concrete beam is simulated using ANSYS finite element software, the bearing capacity, stiffness and deflection are checked and the results can meet the requirement. Finally the prestressed construction technology and engineering economy of a classroom floor structure are given. These can provide reference for rational design of similar floor system.
Prevent Fabricated Floor Slit Cracking Construction Technology
Authors: Liu Yi
Published: August 2012

This paper adopts new construction method, fundamentally resolves and prevent the fabricated floor seam cracking phenomenon, save the cost and produce the obvious economic benefits and social benefits.
Seismic Rehabilitation of a Three-Storey R/C Flat-Slab Prototype Structure Using Different Techniques
Authors: Valente Marco
Published: August 2012

This paper presents some results of a numerical study on the seismic performance and retrofitting of a R/C flat-slab prototype structure. The study was based on an experimental program carried out at the JRC ELSA Laboratory with the aim of assessing the seismic behaviour of flat-slab structures. Numerical models of the test structure were developed and nonlinear static and dynamic analyses were carried out. Two seismic retrofit techniques were numerically simulated to enhance the seismic performance of the structure. First the structure was rehabilitated by concrete jacketing of columns with added longitudinal and transverse reinforcement. The second intervention was based on confinement of column ends by using FRP wrapping. The results of this study provide information about the seismic performance of a common type of R/C structure not covered by the provisions of Eurocode 8, as well as the potential to mitigate the expected damage for varying earthquake intensity through retrofit. The comparison of the overall seismic response of the bare and rehabilitated structures showed the seismic performance improvements provided by the retrofitting interventions.
Study on Stability Behavior of Cable-Stayed Ultra-High Strength Steel Column with Welded I-Section
Authors: Bai Zheng Xian , Chen Ming Fei , Hou Xi Ming , Xu Ke Ran , Liu Yu Min , Dai Chun Sheng , Xu Chao
Published: August 2012

Overall elastic-plastic stability behavior of cable-stayed ultra-high strength steel (660MPa) column with welded I-section is studied by geometric and material nonlinear FEM of software ANSYS. Longitudinal residual stresses and initial imperfections are taken into consideration. The results indicate that cable-stayed type can significantly improve overall stability bearing capacity and effectively control mid-span deflection of ultra-high strength steel column.
Experimental Research of Bending Capacity of Normal Section of Steel Fiber Reinforced Concrete Wall-Beams Simply Supported
Authors: Qi Su , Zhang Ye , Liu Shu Hao , Song Xiong
Published: August 2012

Because the joists in the wall-beams are in eccentric tension during work and the concrete tensile strength is low, the bending capacity of normal section of wall-beams is not too large. Steel fibers mixed into the concrete, playing enhancement and crack-resistance roles would lead to changes in the nature of concrete materials so that it is impossible to fully use the existing research results of ordinary concrete wall-beams simply supported when studying bending behavior of normal section of steel fiber reinforced concrete wall-beams simply supported. Therefore, it is necessary to do pilot studies on bending behavior of normal section of steel fiber reinforced concrete wall-beams simply supported. Based on the vertical static load test of 12 steel fiber reinforced concrete wall-beams simply supported specimens under different fiber volume ratio conditions, the strains of steel and concrete, cracking load, failure load and development situation in the cracks were tested while working characteristics of steel fiber reinforced concrete wall-beams simply supported were studied. This paper discussed the effect of fiber volume ratio on cracking moment and ultimate moment of steel fiber reinforced concrete wall-beams simply supported, which shows that the optimum mixing amount of steel fiber is 1.2%. The conclusion is of great significance in both theory and engineering practice, and it helps to guide the application of practical engineering.
Research on Mixture Ratio of Recycled Concrete Aggregate in Concrete
Authors: Cheng Yong San , Yu Ke Qiang , Wang Shuang Xi
Published: August 2012

In order to better understand the recycled concrete aggregate, it is essential to investigate the different mixture ratio in it. For determining the better mixture ratio of recycled concrete aggregate, the experimental investigation was conducted by making use of recycled concrete aggregate of different ratio instead of small stones in concrete, while maintaining the proportion of other raw materials of concrete unchanged. Its mechanical properties were also investigated. It is found that the better materials proportion of recycled concrete is that sand: recycled aggregate: water= 1: 1.8 : 2.1: 0.55.