bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of feed supplementation on chemical composition of duck eggs in coastal areas of Bangladesh
Authors: Rahman MM , Khan MJ , Chowdhury SD , Akbar MA
Published: February 2012

An experiment was conducted to investigate the effect of feed supplementation on chemical composition of Jinding duck’s egg. A total of 180 physically sound eggs were randomly collected in each time at 50% and 75% level of egg production of the ducks. Significant difference was observed for dry matter content of egg albumen of ducks fed on different diets at 50% level of egg production (P<0.01) but no significant difference was recorded for dry matter content of egg yolk at 50% level of egg production (P>0.05). The CP contents of egg albumen and egg yolk differed significantly (P<0.01) at 50% level of egg production but the difference was not significant (P>0.05) for CP content of egg yolk at 75% level of production. There were significant differences (P<0.01) on EE and TA contents of egg albumen and egg yolk at all levels of production. The results of the study demonstrated that the dry matter, as well as crude protein, ether extract and total ash content of eggs on dietary treatment T1(Scavenging + standard ration) was highest compared to the eggs on other treatment groups (T0, T2, T3, T4 and T5). Key words: Feed supplementation; Chemical composition; Jinding duck; Scavenging; Coastal areas. DOI: http://dx.doi.org/10.3329/bjas.v39i1-2.9690 Bang. J. Anim. Sci. 2010, 39(1&2): 163-169
Growth performance and uniformity of commercial brown layer chicks
Authors: Haider S , Chowdhury SD
Published: February 2012

Growth performance of commercial brown layer chicks (Shaver 579; n = 408) was studied in an open-sided house by feeding layer starter and layer grower diets during 0-17 weeks of age. The experimental period was divided into three phases: Phase I (0-4 weeks), Phase II (5-7 weeks) and Phase III (8-17 weeks). Both growth and feed consumption closely followed the standard data except during 10, 11, 12 weeks of age when the birds had to face some stresses. The target body weight was 1.4 kg which was achieved at proper age (17 weeks) by consuming feed almost similar to standard amount. Compensatory growth of chicks occurred during the later stage of growing period. The flock uniformity was 80% at 17 weeks. Livability of chicks was found to be excellent (99.3%) during the experimental period (0-17 weeks). It is suggested that despite some stresses, commercial brown layer chicks may achieve body weight and uniformity close to breeder’s standards when reared in an open-sided house. Key words: Growth; Uniformity; Commercial brown layer DOI: http://dx.doi.org/10.3329/bjas.v39i1-2.9691 Bang. J. Anim. Sci. 2010, 39(1&2): 170-175
Effect of dietary inclusion of palm oil on feed consumption, growth performance and profitability of broiler
Authors: Rahman MS , Akbar MA , Islam KMS , Iqbal A , Assaduzzaman M
Published: February 2012

A total of 300 day-old Hubbard Classic broiler chicks were reared to investigate the effect of dietary inclusion of 2, 3, 4 and 5% of palm oil on feed consumption, growth performance and profitability of broiler. Addition of 4% palm oil in diet found to attribute additive effect on the growth of the bird from 2nd to 4th week of the trial. Broilers of 2 and 3% oil added group attained 1791g and 1777.67g live weight, respectively which was 4% and 3% higher than that of the control. Similar effect of different levels of palm oil was also observed in case of live weight gain. Dietary inclusion of palm oil improved feed consumption and significantly (P<0.05) higher feed consumption was recorded in 4% palm oil group than 5% oil group. From the economic analysis on production cost of broiler, it was found that total cost per broiler was the lowest in control group (Tk. 115.92), which was lower by Tk. 8.23, 7.46, 9.13 and 2.68 than the 2%, 3%, 4% and 5% oil added groups, respectively. Profit earned from each group (Tk/broiler and Tk/kg broiler) was statistically similar (P>0.05). It can be concluded that profitable broiler production might be possible without supplementation of palm oil. Key words: Broiler; Feed Consumption; Growth, Palm oil; Profitability DOI: http://dx.doi.org/10.3329/bjas.v39i1-2.9692 Bang. J. Anim. Sci. 2010, 39(1&2): 176-182
Impact of field fertility clinic on dairy production in peri urban areas of Chittagong District
Authors: Islam MS , Sikder MSI , Hossain MM , Akteruzzaman M , Shamsuddin M
Published: February 2012

The study was undertaken to compare the relative profitability of dairy farming under Field Fertility Clinic (FFC) member and non-members. A total of 130 samples were selected randomly of which 100 were members and 30 were non-members. Total cost of raising dairy cow was estimated at Tk. 142.04 and Tk. 158.21/day for member and non-member farmers. Feed cost constituted about 71.64 per cent and 69.94 per cent of total cost for member and non-member farmers respectively. Concentrate occupied the largest share out of total feed cost. In case of member, net return per day per cow was Tk. 96.02 while in the case of non-member it was Tk. 65.94. Return from per dairy cow of the members was higher by Tk. 30.08 than the non-members. The average milk yield was 6.06 liters and 5.81 liters respectively for member and non-member farmers. Cobb-Douglas production function analysis was done to determine the effects of variables inputs such as concentrate feed, paddy straw, green grass, human labour, veterinary cost and FFC intervention on milk yield. The finding showed that all of the selected variables except paddy straw had significant impact on milk yield. Key words: Field fertility clinic; Milk yield; Cobb-Douglas production function; Net return DOI: http://dx.doi.org/10.3329/bjas.v39i1-2.9694 Bang. J. Anim. Sci. 2010, 39(1&2): 183-190
Comparative study on the cost benefit between indigenous and cross bred cows reared in rural area of Dinajpur District
Authors: Islam MM , Topader AH , Rob A
Published: February 2012

A comparative study on cost benefit analysis of crossbred and indigenous cows reared under the small holder dairy was conducted in Dinajpur district of Bangladesh. A total of 70 dairy cows (20 crossbred and 50 indigenous) from rural level small and marginal dairy farmers (1-3 cows) were selected. Relevant information from the individual milk producers have been collected through personal interrogation method with the help of a structured data collection questionnaire prepared for the study. The cost involvement for feed, treatment and medication of crossbred cows were significantly higher (P<0.01) than the indigenous dairy cows. The per day milk production was found 1.86 ± 0.57 liter in indigenous cow whereas 5.94 ± 3.49 liter was in crossbred cows and income level from milk yields of crossbred cows were 3.19 times higher than the indigenous cows. The cost benefit ratio of rising crossbred and indigenous dairy cows were 1.19 and 1.26, respectively. The current rearing cost of crossbred cows is 2.71 times higher than indigenous cows. Considering the other traits it may be concluded that the raising of crossbred cows was more economic than the raising of indigenous cows. Since crossbred cows were more economical and gave higher yield than the indigenous cows inclusion of a few crossbred cows can increase the income of a dairy entrepreneur which improve the livelihood and provide round the year employment of its family labour. Key words: Cross bred cows; Indigenous cows; Income; expenditure; Cost benefit ratio DOI: http://dx.doi.org/10.3329/bjas.v39i1-2.9696 Bang. J. Anim. Sci. 2010, 39(1&2): 191-196
RETRACTED: Ye et al. Dextran Sulfate Sodium Inhibits Alanine Synthesis in Caco-2 Cells. Int. J. Mol. Sci. 2011, 12, 2325–2335
Authors: Lin Shu-Kun
Published: February 2012

It has been brought to our attention by the corresponding author that the results presented this article [...]
Isolation and Characterization of Activators of ERK/MAPK from Citrus Plants
Authors: Furukawa Yoshiko , Okuyama Satoshi , Amakura Yoshiaki , Watanabe Sono , Fukata Takahiro , Nakajima Mitsunari , Yoshimura Morio , Yoshida Takashi
Published: February 2012

Extracellular signal-regulated kinases 1/2 (ERK1/2), components of the mitogen-activated protein kinase (MAPK) signaling cascade, have been recently shown to be involved in synaptic plasticity and in the development of long-term memory in the central nervous system (CNS). We therefore examined the ability of Citrus compounds to activate ERK1/2 in cultured rat cortical neurons, whose activation might have a protective effect against neurodegenerative neurological disorders. Among the samples tested, extracts prepared from the peels of Citrus grandis (Kawachi bankan) were found to have the greatest ability to activate ERK1/2. The active substances were isolated by chromatographic separation, and one of them was identified to be 3,5,6,7,8,3′,4′-heptamethoxyflavone (HMF). HMF significantly induced the phosphorylation of cAMP response element-binding protein (CREB), a downstream target of activated ERK1/2, which appears to be a critical step in the signaling cascade for the structural changes underlying the development of long-term potentiation (LTP). In addition, the administration of HMF into mice treated with NMDA receptor antagonist MK-801 restored the MK-801-induced deterioration of spatial learning performance in the Morris mater-maze task. Taken together, these results suggest that HMF is a neurotrophic agent for treating patients with memory disorders.
Chemisorption and Reactions of Small Molecules on Small Gold Particles
Authors: Bond Geoffrey C.
Published: February 2012

The activity of supported gold particles for a number of oxidations and hydrogenations starts to increase dramatically as the size falls below ~3 nm. This is accompanied by an increased propensity to chemisorption, especially of oxygen and hydrogen. The explanation for these phenomena has to be sought in kinetic analysis that connects catalytic activity with the strength and extent of chemisorption of the reactants, the latter depending on the electronic structure of the gold atoms constituting the active centre. Examination of the changes to the utilisation of electrons as particle size is decreased points to loss of metallic character at about 3 nm, as energy bands are replaced by levels, and a band gap appears. Detailed consideration of the Arrhenius parameters (E and ln A) for CO oxidation points clearly to a step-change in activity at the point where metallic character is lost, as opposed to there being a monotonic dependence of rate on a physical property such as the fraction of atoms at corners or edges of particles. The deplorable scarcity of kinetic information on other reactions makes extension of this analysis difficult, but non-metallic behaviour is an unavoidable property of very small gold particles, and therefore cannot be ignored when seeking to explain their exceptional activity.
The Incubation of 13a,17-Dihydroxystemodane with Cephalosporium aphidicola
Authors: Fraga Braulio M. , Guillermo Ricardo , Hernández Melchor G. , Chamy María C. , Garbarino Juan A.
Published: February 2012

The biotransformation of 13a,17-dihydroxystemodane (3) with the fungus Cephalosporium aphidicola afforded 13a,17,18-trihydroxystemodane (4), 3b,13a,17-tri-hydroxystemodane (5), 13a,17-dihydroxy-stemodan-18-oic acid (6), 3b,11β,13a,17-tetra-hydroxystemodane (7), 11β,13a,17,18-tetrahydroxystemodane (8) and 3b,13a,17,18-tetra-hydroxystemodane (9). The hydroxylation at C-18 of the substrate points to a biosynthetically-directed transformation, because aphidicolin (2) is hydroxylated at this carbon. However, the C-3(b) and C-11(b) hydroxylations seem to indicate a xenobiotic biotransformation.
Finger Vein Recognition Based on a Personalized Best Bit Map
Authors: Yang Gongping , Xi Xiaoming , Yin Yilong
Published: February 2012

Finger vein patterns have recently been recognized as an effective biometric identifier. In this paper, we propose a finger vein recognition method based on a personalized best bit map (PBBM). Our method is rooted in a local binary pattern based method and then inclined to use the best bits only for matching. We first present the concept of PBBM and the generating algorithm. Then we propose the finger vein recognition framework, which consists of preprocessing, feature extraction, and matching. Finally, we design extensive experiments to evaluate the effectiveness of our proposal. Experimental results show that PBBM achieves not only better performance, but also high robustness and reliability. In addition, PBBM can be used as a general framework for binary pattern based recognition.
Evaluation of Electrical and Optical Plethysmography Sensors for Noninvasive Monitoring of Hemoglobin Concentration
Authors: Phillips Justin P. , Hickey Michelle , Kyriacou Panayiotis A.
Published: February 2012

Completely noninvasive monitoring of hemoglobin concentration has not yet been fully realized in the clinical setting. This study investigates the viability of measuring hemoglobin concentration noninvasively by evaluating the performance of two types of sensor using a tissue phantom perfused with a blood substitute. An electrical sensor designed to measure blood volume changes during the cardiac cycle was used together with an infrared optical sensor for detection of erythrocyte-bound hemoglobin. Both sensors demonstrated sensitivity to changes in pulse volume (plethysmography). The electrical sensor produced a signal referred to as capacitance plethysmograph (CPG) a quantity which was invariant to the concentration of an infrared absorbing dye present in the blood substitute. The optical sensor signal (photoplethysmograph) increased in amplitude with increasing absorber concentration. The ratio PPG:CPG is invariant to pulse pressure. This quantity is discussed as a possible index of in vivo hemoglobin concentration.
Electrical Model of a Carbon-Polymer Composite (CPC) Collision Detector
Authors: Kruusamäe Karl , Punning Andres , Aabloo Alvo
Published: February 2012

We present a study of an electrical model of electromechanically active carbon-polymer composite (CPC) with carbide-derived carbon (CDC) electrodes. The major focus is on investigation of surface electrode behavior upon external bending of the material. We show that electrical impedance measured from the surface of the CDC-based CPC can be used to determine the curvature of the material and, hence, the tip displacement of a CPC laminate in a cantilever configuration. It is also shown that by measuring surface signals in the process of an actuator’s work-cycle, we obtain a self-sensing collision-detecting CPC actuator that can be considered as a counterpart of biomimetic vibrissae.
The Lived Experience of Non-Degree Learners From a Time-Modified Traditional Baccalaureate Nursing Program
Authors: DeBoor Stephanie S. , Smyer Tish
Published: February 2012

An emerging trend to temper the nursing shortage is to accelerate the pace of traditional 4-year baccalaureate programs, with minimal curricular or programmatic changes, which we refer to as a Time-Modified Traditional Program (TMTP) study. Many students enrolled in a TMTP reflect the characteristics of entry-level, traditional nursing students. The purpose of this study was to gain an understanding of how those non-degree, traditional baccalaureate nursing students experience education in a TMTP. Van Manen’s six research activities of hermeneutic phenomenology guided this study. Colaizzi’s seven-step method was used for analyzing the research data. Eight main themes were identified that provide a description of the phenomenon. Due to the intensity and time requirements of the program, students become disengaged from their previous lifestyles and relationships. Building a strong support system with faculty and peers and assuming personal accountability for learning contributes to the overall success of the program.
Comparison of Sedative Drugs Under Peribulbar or Topical Anesthesia During Phacoemulsification
Authors: Dogan Rafi , Karalezli Aylin , Sahin Durmus , Gumus Funda
Published: February 2012

BACKGROUND AND OBJECTIVE:

To compare dexmedetomidine and midazolam+fentanyl sedation primarily based on patient satisfaction during phacoemulsification under topical and peribulbar anesthesia.

PATIENTS AND METHODS:

Prospective, randomized, and double-blind study of 80 American Society of Anesthesiology grade I–II patients who underwent phacoemulsification with local anesthesia under sedation. Patients were divided into four groups (20 patients for each): dexmedetomidine and topical anesthesia, dexmedetomidine and peribulbar anesthesia, midazolam+fentanyl and topical anesthesia, and midazolam+fentanyl and peribulbar anesthesia. Patient and surgeon satisfaction were determined on a 5-point scale. The pain was determined by verbal pain scale intraoperatively and postoperatively. Drugs were given to a Ramsay sedation scale of 3. Topical and peribulbar anesthesia were performed by an ophthalmologist. Hemodynamic, respiratory, and intraocular pressure monitoring was done. Operative and recovery times were recorded.

RESULTS:

In the midazolam+fentanyl groups, better patient and surgeon satisfaction scores were obtained (
P
< .005), verbal pain scale scores were significantly lower (
P
< .001), and patients needed less postoperative analgesia. Ramsay sedation scale scores were between 3 and 4 in all patients and there were no significant differences. Intraocular pressure alterations were similar between groups. Recovery time was longer in the dexmedetomidine groups (
P
< .05).

CONCLUSION:

The study demonstrated that the midazolam+fentanyl combination provided high-level patient satisfaction scores, low-level pain scores, and shorter recovery time. Also, both of the peribulbar and topical anesthesia procedures showed similar efficiency.
Nd:YAG Laser Treatment for Epithelial Ingrowth After Laser Refractive Surgery
Authors: Lindfield Dan , Ansari Gulrez , Poole Thomas
Published: February 2012

Epithelial ingrowth under refractive surgery flaps occurs in primary treatment and in further flap lift. Nd:YAG treatment was first described in 2008. In the only series published to date, 100% of patients treated had topographic and symptomatic improvement. The authors pictorially illustrate two cases of epithelial ingrowth following laser in situ keratomileusis achieving complete symptomatic relief and marked microscopic improvement following Nd:YAG laser treatment.
Improving Web Browsers Using Bayesian Theory
Authors: Chen Zhong
Published: February 2012

In recent years, much research has been devoted to the study of Scheme; unfortunately, few have improved the refinement of simulated annealing. Given the current status of pervasive configurations, theorists urgently desire the visualization of consistent hashing. We leave out these results for now. We show that although e-business can be made unstable, secure, and distributed, voice-over-IP and SCSI disks are often incompatible.
Ultra-Mild Wear of Al2O3 Fibre and Particle Reinforced Magnesium Matrix Composites
Authors: Banerji A. , Hu Henry , Alpas Ahmet Tugrul
Published: February 2012

Sliding wear behaviour of Mg alloy AM60 reinforced with Al2O3 fibers and particles, i.e, AM60-9% (Al2O3)f and AM60-(9% (Al2O3)f + 4% (Al2O3)p) have been studied by performing boundary lubricated pin on disk tests against AISI 52100 steel counterface under low loads (1.0-5.0 N). The results showed that the material loss from Mg composites tested under 1.0 N and 2.0 N loads was negligible. Under 5.0 N load and after 1.0×105 sliding cycles, AM60-9% (Al2O3)f showed increased volumetric loss whereas under the same conditions AM60-(9% (Al2O3)f + 4% (Al2O3)p) continued to protect the Mg-matrix from damage by the counterface as Al2O3 fibre+particle height remained exposed over the Mg matrix by 1.8 μm and acted as load bearing elements. Transfer of Fe particles to the worn surface of Mg composites resulting from extensive counterface damage due to abrasion by hard Al2O3 fibres and particles was also detected.
The Effects of Clay Content and Sonication Time on Water Uptake in Epoxy-Organoclay Nanocomposites
Authors: Gasem Zuhair M. , Merah Necar , Adinoyi M.J. , Khan Zafarullah
Published: February 2012

The effects of clay loading and the extent of sonication time on water uptake in epoxy-organoclay based nanocomposites have been investigated as a function of exposure time in 3.5% NaCl at room temperature. Three clay loadings (2%, 4%, and 5wt.%) were dispersed in the epoxy resin by 10 and 60 minute sonication. The weight gains in the neat epoxy and the nanocomposites with 2 wt.% and 4 wt.% clay loadings showed a common asymptotic saturation value of 0.72 wt.% after 1000 hours of exposure. The saturation value was independent of sonication time. Nanocomposite with 5% clay loading and 60 minutes sonication exhibited a unique behavior and did not show saturation after 1000 hours of exposure. Scanning electron microscopy of tensile fractured nanocomposite specimens revealed the presence of organoclay aggregates, the size and number of which increased with an increase in clay loading. The Glass transition temperatures (Tg) for the nanocomposites decreased by approximately 20-25C° after 1000 hours of exposure in 3.5% NaCl solution.
The Effect of Sodium Silicate Concentration on the Properties of the Coating Formed on Pure Zirconium by Microarc Oxidation Coating Technique
Authors: Gencer Y. , Tarakci M. , Cengiz S. , Gunduz K.O.
Published: February 2012

In this study, zirconium oxide coatings were formed on pure zirconium by microarc oxidation technique with the electrolytes containing KOH and different amounts of sodium silicate (0-40 gr/lt) for the same coating duration of 2 hours. The microstructure, surface roughness, phase content and chemical composition of the coatings were characterized by using scanning electron microscopy, profilometery and X-ray diffractometry. It was found that the coatings on surface of zirconium consist of monoclinic ZrO2 (m-ZrO2) and tetragonal ZrO2 (t-ZrO2) phases and the addition and increasing sodium silicate concentration in the electrolyte increases amount of t-ZrO2 phase. The coatings were well adhered to Zr substrate with some cracks and porosities in the coating for all concentrations of sodium silicate. The coating thickness and surface roughness increased with sodium silicate concentration in the electrolyte. A glaze like Si rich structure and its increase with Si rate was evident in the outermost region of the coating.
Parametric Study of Carbide Precipitation in 16wt% Chromium Ferritic Stainless Steel (FSS) Welds
Authors: Amuda M.O.H. , Mridha S.
Published: February 2012

Other than grain coarsening, the loss of corrosion resistance in ferritic stainless steel (FSS) welds due to intergranular precipitation of chromium carbides restricts the use of the alloy for structural application. The use of cryogenic cooling offers dual opportunities for the control of weld geometry and grain structure in FSS. This results in improved mechanical properties but the effect on carbide precipitation was not investigated. In this paper, the effect of heat flux, welding speed and flow rate of cryogenic liquid on carbide precipitation in 16% chromium FSS welds are discussed. The use of cryogenic cooling reduces the size of the sensitized zone but this is not significantly affected by the flow rate of the cryogenic fluid. Compared to the conventional welding, the cryogenic cooling increases the cooling rate and reduces the martensite content in the high temperature heat affected zone (HTHAZ) by about 20%. This results in wider ditched-structure in welds made with flow rates lower than 0.052L/min. Cryogenic cooling produces more ditched weld microstructure revealed by electrolytic etching in oxalic acid; however, the structure is acceptable since no single grain boundary is completely surrounded by ditches.
Effect of Process Parameters and Tool Coating on Mechanical Properties and Microstructure of Heat Assisted Friction Stir Welded Polyethylene Sheets
Authors: Azarsa Ehsan , Mostafapour Asl Amir , Tavakolkhah Vahid
Published: February 2012

With the increasing growth of engineering plastics, the demand for reliable, rapid, high productivity and cost effective joining methods (similar to those used in the case of metals) is an undeniable requirement [. Furthermore, the need to produce larger and more complex parts from polymers has created an increased demand for joining, particularly in thermoplastic materials. In the case of creating a joint with high efficiency (the ratio of joint strength to base material strength) between currently available joining methods, welding is the best option [2,3]. Plastic welding processes can be divided into two groups: (1) Processes involving mechanical movement to produce heating (ultrasonic welding, friction welding, vibration welding) (2) processes involving external heating (hot plate welding, hot gas welding and resistive and implant welding) [. The welding method presented in this study utilizes both mechanical movement and external heating to produce heat.
Testing for Green Compression Strength and Permeability Properties on the Tailing Sand Samples Gathered from Ex Tin Mines in Perak State, Malaysia
Authors: Abdullah A. , Sulaiman Shamsuddin , Baharudin B.T. Hang Tuah , Ariffin Mohd Khairol Anuar , Vijayaram T.R. , Sayuti Mohd
Published: February 2012

Permeability and green compression strength are among the important mechanical properties and considered much in the sand casting mould preparation. These molding sand properties play a vital role in determining the optimum moisture content for making green sand casting mould. Tailing sand is the residue mineral from tin extraction, which contains between 94% and 99.5% silica and in abundance in Kinta Valley of state of Perak, Malaysia. In this research work, samples of tailing sands were gathered from four identified ex tin mines located at the Perak State, Malaysia. They were investigated by the standards and testing procedures prescribed by the American Foundrymen Society (AFS). Sand specimens of size Ø50 mm×50 mm in height from various sandwater ratios bonded with 4% clay were compacted on applying three ramming blows of 6666 g each by using a Ridsdale-Dietert metric standard rammer. The specimens were tested for green compression strength using Ridsdale-Dietert universal sand strength machine and permeability number with Ridsdale-Dietert permeability meter. Before the tests were conducted, the moisture content was measured using moisture analyzer. Samples with moisture content ranging from 3 to 3.5% were found to have optimum working range with effective green compression strength and permeability.
A Surface Roughness Study for Machining of Udimet500 Superalloy, through Statistical Analysis of Influential Parameters
Authors: Ghadiri Zahrani Es , Soleimanimehr H. , Heidari Shahmaleki Amir , Zamani D.
Published: February 2012

Superalloy is an alloy that has been developed to be used in processes with high thermal and mechanical stresses and also preserving high surface stabilities. Because of the increase in temperature and wearing of tool tip (even in low cutting speeds), machining of these materials has not developed considerably. Increase in demand for machining of these materials equally increases the need for investigating their manufacturing methods. For this reason, optimal machining of superalloys is very important and is under great investigations. The most important parameter for manufacturing companies is surface roughness. In the present paper, surface roughness of Udimet500 superalloy which is a nickel-based superalloy is investigated. Based on regression analysis, the most influential parameters to surface roughness are obtained and a relation for the roughness with respect to depth of cut, cutting speed, feed rate and lubricant type (CO2, Z1 or dry) is derived.
Effect of Stress Frequency and Chemical Medium on the Corrosion-Fatigue Behaviour of 316L Stainless Steel
Authors: Sedjal Hamid , Hellal Fatah
Published: February 2012

Among most used materials in implantology and the manufacture of surgical instruments, one finds the austenitic stainless steel AISI 316L, considered for its well adapted mechanical characteristics, its biocompatibility and in particular its resistance to uniform corrosion. The implants are often subjected to cyclic mechanical loads during normal activity of the human body, but they can also be attacked chemically by the physiological medium, under certain conditions. Between several mechanical and chemical parameters that can influence the corrosion-fatigue behavior of such material, the load frequency parameter is highlighted in this work. The aim is to determinate the effect of load frequency changes on the crack growth rate in corrosion-fatigue and to compare this effect in pure fatigue. To make experimental evidences, notched austenitic steel specimens have been submitted to cyclic bending tests inside a chlorine solution simulating the physiological medium (NaCl 0.9%). The bending stress value was taken equal to 200 MPa with a stress ratio R of 0, at different stress frequency values, respectively of 0.5, 1 and 2 Hz. When immersed in the chemical medium, the mechanical behavior of the steel sheets appears to be worst as the frequency decreases, as long as the crack size remains less than the critical one. In pure fatigue, the mechanical behavior changes with the increase of frequency and becomes detrimental. This corroborates different author works for such material.
Analysis for the Influence of the Admixture on the Solidification Rate of Expansion of the α-High-Strength Gypsum Plaster
Authors: Meng Xue Hua , Jin Zu Quan , Li Qing , Zhang Ji Xiu
Published: February 2012

The α-type high-strength gypsum with its superior strength and performance is widely used in precision casting, ceramic molds, arts and crafts as well as plaster and GRG self-leveling and other industries that have higher demands to the dimensional stability of the products. Solidification rate of expansion is an important characterized parameters of gypsum volume stability, and also an important indicator of α-High-Strength gypsum plaster. The common adjustment method of Solidification rate of expansion is to add additives to change the gypsum hydration process. But the influences of different types of additives on setting expansion have not been studied yet, therefore, this paper studied on the influences of citric acid, tartaric acid and sodium pyrophosphate on the solidification rate of expansion of the α-High-Strength gypsum plaster. The results indicate that the gypsum expansion rate was decreased with the increase of gypsum set retarder, the expansion rate was firstly increased and then decreased when the citric acid and sodium pyrophosphate increased; however, when the tartaric acid increased, the expansion gradually decreased, and the tartaric acid and the expansion of the gypsum by and large are in an inverse proportion.
Spatial Numerical Analysis Method of Coupled Vibration between Whole Vehicle Model and Curved Bridge Caused by Bridge Deck Roughness
Authors: Shi Ying , Fang Shan Ting , Tian Qing Yong , Chen Wei
Published: February 2012

In order to analyze the response and influencing factors from vehicle-bridge coupled vibration between curved continuous rigid frame bridge and whole vehicle model of 7 degrees of freedom, a spatial numerical analysis method of vehicle-bridge coupled vibration caused by bridge deck roughness was proposed. According to power spectrum density advised by GB/T 7031-2005, bridge deck roughness was simulated by the application of Fourier reverse transform. Because of delay of front and rear axles and correlation between left and right wheels, the roughness sequence of each wheel was obtained by the frequency response function solved by means of random vibration theory. The samples were taken as the input disturbances, rules of vehicle-bridge coupled vibration response under different grades of bridge deck were obtained using the finite element software ANSYS. Analysis results indicate that the value of dynamic coefficients of displacement and torsional angle increase sharply along with the grade increase of bridge deck roughness, and accurate simulation of bridge deck roughness is crucial for analyzing and evaluating the impact of vehicles on the bridge.
Design and Damping Force Analysis for Turbine Composite Regenerative Damper
Authors: Gao Yong Qiang , Zhang Jin Qiu , Yue Jie , Peng Zhi Zhao
Published: February 2012

Turbine composite regenerative damper is one of new type damper which can regenerate the energy of vibration. The component and principle of generator and regenerate energy for turbine composite regenerative damper is introduce, and based on hydrodynamics and axial turbine basic principle, the relationship between induced electromotive force and piston velocity ,load resistance is induced. At last, the relationship between damping force and piston velocity, load resistance is induced too. The method is meaningful to understand and instruct the design of turbine composite regenerative damper.
Design Method for the Base Beam Connected to Single Pile Cap
Authors: Ding Cui Hong
Published: February 2012

For the long elastic pile, the “m” method is often used to solve the elastic deflection differential equation, and the bending rigidity of pile can be obtained. The single pile can be replaced by one column fixed at two ends which has the same rigidity of the pile to solve the interaction problem of pile, base beam, and upper structure. So the influences of the pile construction error on base beam can be calculated. The analysis example shows that compared with no construction error of pile, the bending moment and the reinforcement of base beam increase greatly in the scope of allowable maximal construction error stipulated by the Code. The calculation method of the internal forces of base beam is put forward.
Stability Analysis for Bedded Rock Slope with Effect of Contact
Authors: Li Xu Dong , Su Chao
Published: February 2012

Structure stability of bedded rock slopes are determined by material characteristic of rock blocks and geometrical non-linearity of the discontinuous interfaces between the rock blocks. Different dip angle of the similar slopes are with different safety factors. In this paper, the discrete element method is adopted for calculation and the common plane method for contact surface searched, and the mathematical model is reviewed. Both states of calculation mode are adopted to analysis and compare, one considers the material elastic-plasticity of blocks of rock slope only, in the contrast, the other introduces the geometrical non-linearity to calculation model and the safety factor is less than the counterpart of first state.
The Stability Analysis of Over-Dip Stratoid Structure Rock Slope
Authors: Lu Shu Qiang , Xu Mo
Published: February 2012

The rock mass structure of granite is massive, so the stability of granite slope is good. Massive rock become stratoid structure when the rock mass contain discontinuities such as joints and faults. The deformation and destruction of the slope rock mass is controlled by the behaviour and orientation of the discontinuities. Especially, the over-dip discontinuities controlled the slope stability. In this paper, based on the abundant field investigation on the slope in left bank diversion tunnel inlets of Nuozadu power station in Lancang River, the types of rock mass structures and the combination between structural planes and slope surface are studied in detail so as to analyze the slope deformation mechanism. Finally, the slope stability is researched systematically by limit equilibrium method and FLAC numerical simulation analysis. A set of technical and methodological system on stability research of over-dip stratoid structure rock slope will hoped to be established.
Perturbation Stochastic Finite Element Method for Chloride Diffusion with Time-Dependent in Concrete
Authors: Yang Lu Feng , Hu Chun Yan , Chen Zheng , Hong Bin
Published: February 2012

The random analysis of the process of chloride diffusion in concrete is a basis of the reliability assessment for durability of concrete structures. In this paper, the diffusion coefficient with time-dependent is introduced to Fick's second law, and perturbation stochastic finite element method (SFEM) with time-dependent(TD) is proposed. The stochastic finite element equation with TD is solved by the perturbation method with a group of recursive equations, by which the mean value and standard deviation of chloride concentration in concrete can be determined. An example is given to demonstrate the accuracy and efficiency of the presented method and shows that the analysis of chloride diffusion with time-dependent for concrete structures is closer to engineering practice.
A Reliability-Based Early Warning System for Real-Time Monitoring on RC Buildings
Authors: Liu Wang Sheng , Zhao Ming
Published: February 2012

Today there is an urgent need for effective monitoring whether for old buildings or new ones. While conventional early warning system for real-time monitoring is based on safety factor, this paper proposes a new reliability-based framework to monitor the safety of RC buildings probabilistically. The framework includes modeling resistance, predicting probability distribution of load effect, calculating reliability and setting reliability index threshold. The in-situ test data enables to update the resistance model through a Bayesian process. Meanwhile, the observed monitoring data predicts the probability distribution of load effect. FORM is used to calculate the reliability because the limit state function for real-time monitoring is linear and simple. This study shows that the reliability-based early warning system is of more scientific sense in quantifying the safety and may be applied to many engineering fields.
Relative Analysis of Post Anchored RC Column Members with Different Material under Repeated Load
Authors: Bao Hai Zhen , Zhou Xin Gang , Sun Hua Ming
Published: February 2012

In order to study the seismic behavior of post anchored RC members with different anchoring materials, such as the ductility, load carrying capacity, energy dissipation, etc, eight RC column joint specimens were designed and tested under repeated cyclical load. Comparing the test result with existing findings, it has shown that column members with organic adhesively bonded rebars which anchorage length is more than 15D, have good carrying capacity, ductility and energy dissipation capacity. Due to the inorganic material is short of deformability, it could satisfy the demand of seismic behavior when the anchorage length is lager than 20D.
Penetration Deep of Non-Deformable Projectile into Concrete Targets
Authors: Sun Wei Wei , Yuan Jun
Published: February 2012

A dynamic cavity-expansion penetration model for concrete targets impacted by non-deformable projectile is developed. Based on the dynamic cavity-expansion penetration model, the equations of the final penetration depth were determined including the effect of additional mass and sliding frictional coefficient. The predicted final Penetration depth was compared with the depth of penetration data and a good agreement was achieved. The analysis indicated the additional mass was negligible compared to the mass of the projectile and independent of the striking velocity. When the friction between the concrete and the nose surface is assumed to be negligible, the final penetration depth increases slightly. The relationship between the principle stress difference at failure and unconfined compressive strength was determined by curve fitting.
Applications of Data Mining in CRM Based on Web Log
Authors: Dang Jian Ning , Zhang Ai Qin , Jing Wei
Published: February 2012

Nowadays, under intensified competition, winning and keeping customers is becoming more and more important. Company must focus on building long-term relationships with their customers for continuously adding market share. For defeating other financial service providers, the banks should have the ability to address their customers' preferences and priorities effectively, and should strategically use this understanding in every area to establish and strengthen long-term customer relationships. Consequently, systematic and web-based customer relationship management (CRM) will be a key factor to future success for financial service institutions. This thesis research explored advanced data mining technologies for building a best next offer predictive model, and focused on providing an integrated approach to improve performance of the prediction.
Bounday-Layer Asymptotics on the Contact Interface in the Impact Problem
Authors: Hou Lei , Wang Bin , Lin De Zhi , Qiu Lin , Ren Yu He
Published: February 2012

The information of boundary condition in the contact interface reflected complex properties of visco-elastic material with various contact conditions. Numerical results and the asymptotic estimates were calculated. It is presented by the software which are consistent with the boundary-layer analysis in our previous papers. In this paper, the application of computer simulating and related numerical result on the contact boundary-layer has been discussed. Numerical results were calculated (by using HPC platform, NAG toolbox for Matlab) and shown by use of the software i.e. LS-DYNA. The numerical scheme yields the convergent finite element analysis (FEA) solution and stable semi-discrete Galerkin-ADI (G-ADI) iteration.
Research on Dynamic Compressive Failure Criterion of Concrete at High Temperature
Authors: Li Yi , Tao Jun Lin , Gao Fei , Li Kui
Published: February 2012

By using the SHPB device, uniaxial impact compression test of concrete were carried out at different temperature (20°C to 650°C). The strength data of concrete at different temperatures and different stain rates was obtained and uniaxial compressive failure criteria of concrete were obtained, in which the high temperature and the strain rate were considered, and it would provide reference for actual projects
Application of Random Aggregate Model to the Problem of Concrete Penetration
Authors: Zeng Yi , Tao Jun Lin , Yao Yong , Liu Xiao Ling , Ren Qian Hui
Published: February 2012

Penetration of concrete targets was simulated based on self-compiled program generating two-dimensional random aggregate model. Random convex polygons were used to simulate the aggregate particles of concrete, HJC model to describe constitutive relations of the aggregates and mortar while concrete targets are subjected to large strains, high pressure and high strain rate. With this model, the Forrestal's penetration test was simulated by ls-dyna software. By comparing the calculated results with the test data, It is shown that random aggregate model can be applied to simulate the dynamic destruction problems of concrete-like materials.
Study on Exterior Insulation System of New Composite Insulation Board
Authors: Chen Xiu Yun , Lin Jian Hao
Published: February 2012

The foam concrete used as surface materials and polyurethane used as core material for the development of new composite heat-insulated board of exterior insulation system. The research and applications showed that the thermal insulation system with excellent constructability, significant environmental benefits, economic and social benefits have been obtained. The implementation of 65% energy saving for residential buildings is the key of further work of energy efficiency in hot summer and cold winter zone, with huge market potential and the good application prospect.
Study on Innovation System for Efficient Ecological Industrial Parks in Boxing
Authors: Guo Bing , Cui Xiu Qin , Li Xiao Guang
Published: February 2012

Scientific orientation is the prerequisite for the success of the construction of the Industrial Park. Boxing use their own advantages and policy advantages, bold reform, innovation, not only to achieve the efficient use of resources, but also in the efforts to complete the ecological industry and ecological agriculture. On this basis, we constantly innovate in system and structure and gradually realize the target of scientific and sustainable development i the modern industry road.
Tombs of Celebrities in Beijing
Authors: Zhao Mei , Gao Wei
Published: February 2012

From an urbanism perspective, the paper focuses on the present situation and space distribution of the tombs of celebrities in Beijing, expounds the relevant influencing factor. The paper teases out the times and identity characteristics of the occupants of the tombs, discusses the special type of the tombs of celebrities. Through analyzing its reasons and evidences, the author puts forward the significance of the protection and utilization of the tombs of celebrities in Beijing.
The Landscape Future of the Coal-Mine Region -Taking Taiyuan as an Example
Authors: Wang Qiong , Zheng Kai , Qiao Zheng
Published: February 2012

This paper aims to study on the landscape future of a large number of coal-mines distributed around the border of resource-based cities in China, which have been abandoned or semi-abandoned, lacking of features, with scattered settlements separated by the industry. Taking the coal-mine region around the city of Taiyuan in Shanxi province as an example, seeing from the perspective of urban economics, landscape ecology and sociological, finding landscape transformation ways to solve the threat of industrial collapse, the suffering from social problems, the seriously polluted waste, the loss of social cultural issues and other series of problems in the region, so as to get economic recovery, land reclamation, and ecological restoration. Special mention is also given in these urbanized areas on how to increase employment, how to establish urban features and how to make a pleasant community
The Analysis of Integrated Financial Capacity of the Power Plant
Authors: Liu Shu Liang , Song Yun Xia
Published: February 2012

The stand or fall of power plant operation is extremely important, so we need to analyze the comprehensive financial capacity of power plant. This paper evaluates the economic benefit of Datang Baoding thermal power plants' expansion project based on the fuzzy comprehensive evaluation mathematical model, to determine the effectiveness of the project after implementation.
Analysis on the Building Material of the Traditional Copper Hall from the Taishan Mountain, Using XRF and GIS
Authors: Zhang Jian Wei
Published: February 2012

The alloy analysis of the building material of the copper hall from Taishan Mountain (TCH) is presented. First, the historical building structure of the TCH is investigated and introduced. Then the X-ray fluorescence (XRF) results are given. Analysis is done based on the units of building component. The results show that about one third of the components are made in brass, and two thirds are in bronze. Further, The XRF results are loaded into geographic information system (GIS) to analyze the relation between the building components and their materials. Most of the major structural components are made in bronze, or contains relative higher Sn. Finally, the reason why TCH use both bronze and brass as building materials is discussed.
A Preliminary Study of Stabilizing Artificial Saline Sludge Using Compound Stabilizer
Authors: Shen Xiao Ming , Li Zhan Guo , Huo Da , Zhao Hai Yan
Published: February 2012

There is large-area saline sludge which should be stabilized in China. In this experiment, cementitious component (cement), alkaline component (Ca(OH)2) and expansive component (sulfuraluminate cement or gypsum) were used as compound stabilizer with different combinations to stabilize artificial saline sludge, then the unconfined compressive strength of stabilized soil samples was determined, and the hydration products of the stabilized soil were analyzed by XRD, the stabilizing mechanism and the required hydrate species of stabilized soil were preliminary explored. The results show that the unconfined compressive strength of stabilized soil increases gradually with the increase of the cement content; when partial cement replaced by right amount of CH, the strength reaches the maximum and higher than that of soil-cement; the use of sulfuraluminate cement plaster as expansive component for stabilizing saline sludge has a relatively good overall affect compared to the gypsum; possible reasons for these results were speculated at the same time.