Top PDF Design Analysis And Application Of Nylon66 In Rotary Spars

Design Analysis And Application Of Nylon66 In Rotary Spars

Design Analysis And Application Of Nylon66 In Rotary Spars

Technology has led to the increased use of plastics as replacement to conventional materials in various sectors. The use of alloy steels in various rotary spares such as gears, cams, bearings, valve seats and other bearing and wear applications that requires quite operation, low coefficient of friction and wear resistance shall be replaced with nylon 66 as per requirements. In the present work I am applying nylon66 in gears and sprocket wheels used in automotive it is proposed to substitute the metallic rotating spares like gears and sprockets with nylon 66 to reduce the weight and noise. For this purpose different types of polymers were considered namely Polyethylene, PVC, Polystyrene, Polypropylene and Nylon66 and their viability are checked with their counterpart metallic gear (Cast iron). Based on the static analysis, the best plastic material is recommended for the purpose.3D model of gears and sprocket wheel chain assembly has been modeled by using Pro-E WF4. The models are then pre-processed using hyper mesh 10 .The pre-processed hyper mesh file is subjected to Static analysis using ANSYS 10.0. Compared to metallic rotating spares the Nylon 66 spares are more suitable for operations under 260 o c temperature and limited load conditions. The designed gear shall be manufactured using injection molding. The die used for injection molding is machined with CNC and the CNC coding shall be generated for the given model. Application of nylon66 make a remarkable changes in cost factors, Weight factors, life factors, wear factors etc., hence the overall efficiency is improved. Keywords: Cast iron spur gears, helical gears, sprocket wheel assembly, Pre Processing, Static analysis, Nylon66.
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Toward Secure Web Application Design: Comparative Analysis of Major Languages and Framework Choices

Toward Secure Web Application Design: Comparative Analysis of Major Languages and Framework Choices

Case study: Object Injection and Rails’ Dependency on YAML. William (B.J.) Snow Orvis is a software programmer with Artemis Internet and iSec Partners, and has frequented the Ruby community presenting talks on addressing security issues in Ruby on Rails development. In Orvis' Secure Development on Rails presentation [11], he covered an object injection vulnerability (similar to SQL injection) that was discovered by Rails contributor Aaron Patterson [14]. This vulnerability affected all versions of the Rails framework, and entailed "multiple weaknesses in the parameter parsing code ... which allow[ed] attackers to bypass authentication systems, inject arbitrary SQL, inject and execute arbitrary code, or perform a DoS attack on a Rails application." It is noted that the parameter parsing code provides applications the ability to automatically typecast strings to certain data types. The caveat uncovered revealed that certain conversions, in particular the creation of symbols and parsing YAML — a highly utilized dependency in Rails — were supported in the parsing code. "These unsuitable conversions can be used by an attacker to compromise a Rails application," warned Patterson.
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Multicriteria analysis for design of microirrigation systems. Application and sensitivity analysis

Multicriteria analysis for design of microirrigation systems. Application and sensitivity analysis

This paper presents a practical application of the DSS MIRRIG for the design of a microirriga- tion system for a citrus orchard in Algarve (Portugal). Several alternatives were considered using different emitter types (drippers, sprayers, pressure-compensating and non-pressure compensating emitters), different pipe sizes and layouts with and without pressure regulation valves, as well as different pressure head and discharge at the upstream end of the systems. This application is described and the ranking of alternative designs is analysed using the weights given by the farmer to the hydraulic, economic and environmental criteria. An analysis of impacts resulting from selecting different weights is presented aimed at under- standing the sensitivity of the model in relation to those criteria. In addition, a sensitivity analysis is performed to test the robustness of the algorithms used for ranking with respect to changes in concordance and discordance threshold values, which show that the values selected by the model are those providing for a more clear ranking of design alternatives.
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Lat. Am. j. solids struct.  vol.13 número10

Lat. Am. j. solids struct. vol.13 número10

The effects of rotary inertia and shear deformation as well as vibration amplitude for various design parameters on the nonlinear natural frequency of thick and short beams for the clamped-free boundary condition are discussed in this section. The accuracy of a first-order approximation of the homotopy analysis method is confirmed by comparison with results obtained from Ramezani et al. (2006) for clamped-clamped microbeams. The geometric and material properties of the Timoshenko beam in consideration are given in Table 1. For purposes of comparison the natural linear frequency
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Analysis and Design of Application Scenarios

Analysis and Design of Application Scenarios

The applications to be built in this sentient room can be divided into two categories: personalized intelligent services and multi-person triggered actions. Here is a sample scenario for the personalized intelligent services. While Alice enters into the sentient room (assuming that it is a semi-public living room), her identity is captured by some device in the room and it starts to behave intelligently in her preferred way. The room finds that it is too dim for Alice to do a given task under the current light intensity, so it automatically turns on additional lights. It sets the room temperature so that Alice will feel comfortable. When Alice sits on the sofa, the room knows Alice is relaxing herself and does the following according to her preferences: it switches on the TV and the Hi-Fi system, tunes to her favourite music channel, and starts playing. By gathering raw sensory data from embedded “invisible” sensors, the intelligent room can then process and analyze them to deduce high-level context and infer personal preferences. Personal preference is not static, but changes with various situations, e.g., time of the day, location, working or relaxing, etc. By associating the personal preferences with context information can make the system behave more intelligently.
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The application of optical measurements for the determination of accuracy of gear wheels casts manufactured in the RT/RP process

The application of optical measurements for the determination of accuracy of gear wheels casts manufactured in the RT/RP process

The article discusses the possibilities of using optical measurements for defining the geometric accuracy of gear wheels casts manufactured in the rapid prototyping process. The tested gear wheel prototype was cast using an aluminum alloy. The casting mould was made by means of the three-dimensional print method (3DP) with the use of a Z510 Spectrum device. The aim of the tests was to determine the geometric accuracy of the cast made by the ZCast technology in the rapid prototyping process. The tests were conducted with the use of the coordinate optical measuring method and a GOM measuring device. The prototype measurements were made in the scanning mode. The results of the measurements, saved in the STL format with the use of the scanning device software, were compared with the gear wheel 3D-CAD nominal model. The measurements enabled the determination of the real accuracy of prototypes manufactured in casting moulds by means of the ZCast technology. The selection of the measuring method was also analyzed in terms of measurement accuracy and the RP technology precision.
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Assessment Of NPK In Human Male And Female Urine For Its Fertilising Potential In Agriculture

Assessment Of NPK In Human Male And Female Urine For Its Fertilising Potential In Agriculture

se of excreta on arable land secures valuable fertilisers for crop production and limits the negative impact on water bodies [29,13, 6]. The environmental impact of excreta disposal usage would always be less than that of the direct use of water bodies as the primary recipient of excreta and greywater [29]. To preserve its fertility, arable land needs to be compensated for the plant nutrients removed. Today, chemical fertilisers produced by fossil resources do mostly this. In the long-term perspective the world cannot securely rely on fossil resources, as the recycling of plant nutrients. Another way of compensating soil fertility is from human excreta’s direct application to arable land [18]. Urine has been used as a valuable plant food for centuries in many parts of the world, particularly in the Far East. It is surprising, therefore, that nearly all the urine produced in the West and in Africa goes to waste and is lost to agriculture [16]. Urine is known to contribute the major proportion of the nutrients (N, P and K) in domestic wastewater as compared to faeces which even poses a greater health risk when used [9]. Thus, separating the urine which accounts for about 1% of the total wastewater flow, and using it as fertilizer makes it possible to utilize most of the nutrient content of wastewater [10]. Urine is usually collected in a source separating toilet [20], and nitrogen
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SELECTION OF NON-CONVENTIONAL MACHINING PROCESSES USING THE OCRA METHOD

SELECTION OF NON-CONVENTIONAL MACHINING PROCESSES USING THE OCRA METHOD

Selection of the most suitable nonconventional machining process (NCMP) for a given machining application can be viewed as multi-criteria decision making (MCDM) problem with many conflicting and diverse criteria. To aid these selection processes, different MCDM methods have been proposed. This paper introduces the use of an almost unexplored MCDM method, i.e. operational competitiveness ratings analysis (OCRA) method for solving the NCMP selection problems. Applicability, suitability and computational procedure of OCRA method have been demonstrated while solving three case studies dealing with selection of the most suitable NCMP. In each case study the obtained rankings were compared with those derived by the past researchers using different MCDM methods. The results obtained using the OCRA method have good correlation with those derived by the past researchers which validate the usefulness of this method while solving complex N CMP selection problems.
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Fabrication Of Gold Nanoparticles-Modified Glassy Carbon Electrode And Its Application For Voltammetric Detection Of CrIII

Fabrication Of Gold Nanoparticles-Modified Glassy Carbon Electrode And Its Application For Voltammetric Detection Of CrIII

Nanoparticles of gold were synthesized at room temperature by reducing Au(III) using NaBH4. Citrate ions were used as capping agent to stabilize the formed nanoparticles. After reduction with NaBH4, the color of gold solution altered from yellow to ruby red implying that the colloidal gold nanoparticles have been formed. Further characterization by TEM confirms that the average diameter of gold nanoparticles were approximately 2-5 nm (Fig. 1) [28]. The AuNPs were also characterized by UV-Vis spectrophotometer, and then corresponding photographic images were gathered. As shown in Fig. 2, a characteristic surface plasmon resonance (SPR) band of AuNPs is observed in the spectrum at approximate  of 518 nm. The resulting wavelengths characteristics and ruby red AuNPs colors were not changed even after 7 days. The prepared AuNPs were stable in the aqueous solution due to the electrostatic repulsion of the negative capping agents,
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SOCIAL ECONOMY – A FORM OF INCLUSION AND OF ''REACTIVATING'' OF LABOR IN THE CONTEXT OF THE CURRENT CRISIS

SOCIAL ECONOMY – A FORM OF INCLUSION AND OF ''REACTIVATING'' OF LABOR IN THE CONTEXT OF THE CURRENT CRISIS

The essence of social economy is the inclusive function of the labor market through which the different forms of social economy that exist in the member states can play a role in the overcoming the crisis, especially in the creating of jobs, including in social services field Opinion of the European Economic and Social Committee on the post‐ 2010 Lisbon Strategy 9, p. .

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Analysis of Structure and Abrasion Resistance of the Metal Composite Based on an Intermetallic FeAl Phase with VC and TiC Precipitates

Analysis of Structure and Abrasion Resistance of the Metal Composite Based on an Intermetallic FeAl Phase with VC and TiC Precipitates

The stages of saturation depends from the introduced titanium's quantity. With reaction: (3) results, that 1 g titanium binds 0.25 g of carbon, which lets 1.25 the g TiC. In this way near the titanium's suitable additions it is possible to tie the whole carbon of solution in TiC, which causes little that the crystallization of carbide of aluminium is probable. It material it which after crystallization was it been possible was to treat as composite was received was then "in situ ”, folding with warp FeAl strengthened titanium's carbides.
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Design and Simulation of a Three-Phase Electrostatic Cylindrical Rotary Micromotor

Design and Simulation of a Three-Phase Electrostatic Cylindrical Rotary Micromotor

In the proposed design for micromotor, cylindrical capacitors are used instead of parallel plate capacitors. Figure 1 depicts a cylindrical capacitor with a solid cylindrical conductor of radius a and charge q that is coaxial with a cylindrical shell of negligible thickness that has radius b  a and

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Design And Implementation Of Smart Living Room Wireless Control For Safety Purpose

Design And Implementation Of Smart Living Room Wireless Control For Safety Purpose

Abstract: This research presents the microcontroller controlled smart living room system using Bluetooth wireless technology from mobile phone.An android apk is created in mobile for controlling the living room system. A 16F877A microcontroller is interfaced serially to a bluetooth module transceiver. It is used for controlling fan speed control, dim light control, lighting ON/OFF and window angle control. An arduino controller is used for keypad control door security. It is connected to DC motor control circuit and switching circuit for opening and closing of the door, keypad for entering password and serial LCD for displaying the update status of the door.User can control the home appliances by using bluetooth connection from mobile phone in its range. User can adjust the dim light, fan speed, window angle and light bulbs from android apk. An internal EEPROM is built in 16F877A microcontroller and it stores the last requested data of the appliances. If userwants to recover the former conditions of the appliances, he can recall them from android apk.
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Overeducation, undereducation and labor earnings in Brazil: a panel data analysis

Overeducation, undereducation and labor earnings in Brazil: a panel data analysis

Although the literature on this issue is vast in developed countries, empirical findings for developing countries are still scarce. One exception is the study by Quinn and Rubb (2006) carried out for Mexico, which presents estimates of overeducation and undereducation effects similar to those obtained from developed countries using cross- sectional data. Diaz and Machado (2008), using a sample of selected occupations in Brazil, also report evidence that the estimated returns to schooling are different across match categories. Mehta et al. (2011) argue that the unavailability of data on the number of years of schooling required for each job helps to explain the scarcity of studies in developing countries. This information allows classifying workers as overeducated, undereducated, or adequately matched. 2
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Some methods for sensitivity analysis of systems / networks

Some methods for sensitivity analysis of systems / networks

A network may considerably change with certain nodes, links, flows, or parameters. To find the most important nodes, links, or other parameters to determine network structure or performance is of significant. Sensitivity analysis is originated from systems science. It explores the relationship between parametric change and systematic output, and is used to find important parameters in the system model. In principle, the sensitivity analysis used in systems science can also be extended to network analysis in which the model output means network output, network stability, network flow, network structure, or other indices, and model input means network nodes, network links, network parameters, etc. In present article, some methods for sensitivity analysis of systems / networks are described in detail.
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Towards experience design: The changing face of technical communication

Towards experience design: The changing face of technical communication

Depending on the application domain, it is quite possible that the traditional role of the technical communicator might be broadened to include a role as an experience designer. Additional heuristics relat- ed to designing and measurement of emotion, user engagement, and experience with and without the system, and locus of control should be developed. his new-age technical communicator should remember that the goal is not simply to capture the direct interaction between the system and the user; neither is it to jump right into the design process. It is equally important for any design to schematize and include ad- ditional experiences related to the product (e.g., branding, mass media experiences).
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Determination Of Longevity Of Teeth In Buckets Of Loading Equipment In Coal Mines - A Case Study

Determination Of Longevity Of Teeth In Buckets Of Loading Equipment In Coal Mines - A Case Study

Field studies were carried out, to collect the required data and samples were drawn from Northern Coalfields Limited (NCL). Details regarding life of teeth of dragline and shovel were obtained and different type of rock samples were collected for the purpose of laboratory study. Brief description of area Northern Coalfields Limited (NCL) is a subsidiary of Coal India Limited (CIL) located in the Sonbhadra district in Uttar Pradesh, and the singrauli region of Sidhi district of Madhya Pradessh. The coal reserve in the north-eastern part of Singrauli coalfield, covering an area of around 220km 2 is 9,121 million tonnes, out of which 2,724 million tonnes are proved reserves and the rest is inferred or indicated. Important coal seams in this part of Singrauli coalfield are: Jhingurda (130-162 m thick), Purewa (8-25 m thick) and turra (12-22 m thick). Coal of these seams are generally high moisture (6-9 %) and high ash (17-40 %) coals. The volatile matter ranges from 25-30 %. The volatile matter ranges from 25-30 %. The calorific value of the coal varies from 4,200-5,900 kcal/kg.
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Human Capital and the Recent Fall of Earnings Inequality in Brazil

Human Capital and the Recent Fall of Earnings Inequality in Brazil

where is a set of linear restrictions that transforms the unrestricted model (1) on restricted model (2). 8 In our case, the restriction implies that the age, trend and (orthogonal) time dummies are sufficient to explain the behavior of each estimated statistic order across cells and over time. Imposing the restrictions means estimating weighted least squares regressions on the grouped data, for each quantile and education group separately. This procedure will give us consistent estimates of . Under the null that the restrictions are valid, the minimized value follows a chi-square distribution with degrees of freedom equal to the number of restrictions. In order to construct the test statistics, we only have to sum up the weighted squared residuals, that is, the estimated percentiles minus the predicted values minus the orthogonal time dummies.
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Combined enzymatic and physical deinking methodology for efficient eco-friendly recycling of old newsprint.

Combined enzymatic and physical deinking methodology for efficient eco-friendly recycling of old newsprint.

The present work demonstrated that an improved level of deinking was achieved by using xylanase and laccase sequentially as compared to xylanase or laccase alone. Pretreatment of ONP pulp with xylanase, followed by laccase, obtained a brightness of 59.660.8% ISO which was 8.5, 11.4 and 21.6% higher than that of the P-L-C, P-X-C and untreated pulp (Table 1). ERIC for P-X- L-C deinked pulp was 183.07624 ppm which was 9.4, 35.2 and 65.8% lower than P-L-C, P-X-C and untreated pulp. The substantial reduction in residual ink concentration clearly showed the effective role of laccase followed by xylanase in deinking of ONP pulp. Xylanase acts on waste pulp, thereby removing xylan and opening the fibers for the subsequent chemical or enzyme attack. Laccase acts on the exposed lignin content of the pulp thereby facilitating the removal of lignin monomers and contam- inants attached to lignin besides removing/dislodging ink particles. This synergistic action of xylanase and laccase thereby enhanced the brightness. Bacterial laccases have been previously reported to show potential in the biobleaching of pulp [25,7], but not for their use in deinking of pulp. The correlation between release of chromophores (l 237 nm), hydrophobic compounds (l 465 nm), Table 3. The crystallinity index and apparent crystal size
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Performance Of Different Tillage Implements And Their Effects On Sorghum And Maize Grown In Gezira Vertisols Sudan

Performance Of Different Tillage Implements And Their Effects On Sorghum And Maize Grown In Gezira Vertisols Sudan

Results in Table 2 shows the measured weed parameters during the two seasons (1998 and 1999). The analysis of variance showed no significant differences (P<0.05) between different tillage methods during the first season. In the second season significant differences in total number of weeds at (P<0.05) and percent ground cover at (P<0.01) were observed. The disc plowing and chiseling to 20 cm depth resulted in significantly lower total number of weeds compared to the minimum tillage (100 per m 2 ). Minimum tillage gave highly significant (P<0.01) in percent ground cover (25%) when compared to chiseling at both depths, harrowing to 10 cm and disc plow treatments. Chiseling and harrowing implements work the soil deeper than minimum tillage, thereby resulting in a better weed control reflected in lower weed population. It is clear from Table 2 that the total number of weeds during the second season was about half that of the first season. This may be due to a combined effect of tillage and herbicides of the pervious cotton crop. The higher weed infestation recorded for minimum tillage method compared to chisel and disc implements might be attributed to the manipulation and inversion of the soil, similar observations have been reported by Dawelbeit and Salih (1994).
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