ECONOMICAL HIGH ROBUSTNESS AND PRECISION LINEAR GUIDE

Fatty acid composition and sensory characteristics of lamb carcasses from Britain and Spain

MEMS chips have become ideal candidates for various applications since they are small sized, light weight, have low power consumption and are extremely low cost and reliable. However, the performance of MEMS sensors, especially their biases and scale factors, is highly dependent on environmental conditions such as temperature. Thus a quick and convenient calibration is needed to be conducted by users in field without any external equipment or any expert knowledge of calibration. A novel and efficient in situ hand calibration method is presented to meet these demands in this paper. The algorithm of the proposed calibration method makes use of the navigation algorithm of the loosely-coupled GPS/INS integrated systems, but replaces the GPS observations with a kind of pseudo-observations, which can be stated as follows: if an inertial measurement unit (IMU) was rotating approximately around its measurement center, the range of its position and its linear velocity both would be within a limited scope. Using a Kalman filtering algorithm, the biases and scale factors of both accelerometer triad and gyroscope triad can be calibrated together within a short period (about 30 s), requiring only motions by hands. Real test results show that the proposed method is suitable for most consumer grade MEMS IMUs due to its zero cost, easy operation and sufficient accuracy.

As the number of breast cancer patients are increasing , we need more reliable method that can helps in detecting the type of cancer in early stages which will lead to save the patients’ lives as the earlier tumor is detected the higher chance for recovery. Therefore the aim of our project is to design compact low profile wearable antenna that is used for early cancer detection with low cost. In this work we will use the microstrip patch antenna which is most suitable type of antenna for this project due to its small size, light weight, low profile, easy fabrication & low cost. Next, frequency band is ISM band , which is the industrial , scientific & medical band is used in this work. The frequency range is 2.4Ghz to 2. 5GHz Keywords: Microstrip patch, compact, ISM band, wearable, antenna, Tumour Detection Cite this Article Kranti D. Patil. Review on Microstrip Patch for Detection of Breast Cancer. Journal of Microwave Engineering & Technologies . 2020; 7(1): 34–37p.

Short-term and long-term behavior of RC beams strengthened by galvanized steel mesh laminate

The characteristics and applications of the system for welding machines based on SCM , based on PLC control system and PC-based industrial control system was introduced. It has certain significance to the design of welding machine control system.

Recently, 5000 series and 6000 series Al alloys have been used as hull materials for small and medium-sized ships because of their excellent weldability, corrosion resistance, and durability in marine environments. Al ships can navigate at high speed due to their light weight. However, cavitation-erosion problems cause reducing durability of Al ship at high speed. In this investigation, 5052-O, 5083-H321, and 6061-T6 Al alloy materials were used to evaluate the damage characteristics with amplitude (cavitation strength). As a result of the electrochemical experiments, the corrosion current density and corrosion potential of 6061-T6 in seawater were 8.52 × 10-7 A/cm2 and -0.771 V, respectively, presenting the best corrosion resistance. The cavitation-erosion experiment showed that 5052-O had the lowest hardness value and cavitation-erosion resistance. 5052-O also had a very short incubation period. As the experiment progressed for 5052-O, pitting formed and grew in a short time, and was observed as severe cavitation-erosion damage that surface detached. Among the three specimens, 5083-H321 presented the highest hardness value and the damage rate was the smallest after the initiation of pitting.

Titanium alloys are the most advantageous metals for the medical and aerospace industry because of their light weight and excellent corrosion resistance. Several techniques were investigated to achieve reliable welds with optimal distortion for the fabrication components used in industry. Laser welding is the most important joining technique because of its precision, rapid processing. For pulse mode Nd:YAG laser; pulse shape, energy, duration, repetition rate and peak power are the most important parameters effects the weld quality. And also the combinations of these parameters are very important for pulsed laser seam‐welding. In this study, an experimental work has been done to determine the pulsed laser seam‐welding parameters for 3mm thick titanium alloys using the Lumonics JK760TR Nd:YAG pulsed laser.

Glass is one of the commonly used materials with exceptional properties such as high mechanical strength, high chemical resistance, and low dielectric coefficient. Over the past decade, laser has been developed as a promising tool for welding between similar and dissimilar materials, especially glass and metals. Aluminum is also a commonly used material, which is known for its light weight, high conductivity, and high specific strength. In this study, we conducted a glass-to-aluminum welding experiment using lasers, reported the welding results, and analyzed the influential factors of the welding strength caused by the laser system, including power, repetition rate, scanning speed, and scanning cycles. From the analysis, we found that power, scanning cycles, and interactions of the laser parameters are significantly important to the welding strength. Moreover, we built a logistic regression model to predict whether a welding sample can have a strong connection between glass and aluminum given the laser parameters. The results indicate that our model can achieve maximum accuracy of 81.2% for the prediction task. Therefore, our findings can fill the gap from previous studies that were lack of statistical data analysis and prediction tasks in glass-to-aluminum welding, and further enhance the welding quality in future studies.

PurposeThis study aims at identifying Andrews University's students' perceptions, behavior, use, and attitudes towards e‐textbook and e‐books in general.Design/methodology/approachIn the Fall semester of 2001‐2012, Andrews University's bookstore offered 74 e‐textbooks for purchase. The teachers who had the opportunity of using these e‐textbooks for their classes were asked to distribute two questionnaires to their students: one to those who chose to buy and use the e‐textbook and a slightly different one to those who chose the traditional print textbook. The results were tabulated and compared to the results of similar studies since 2001.FindingsA 65 percent return rate was obtained. Several findings closely replicate results of many studies on this area. For more than a decade, studies show that students prefer the hardcover book over the e‐book for their studies. Lack of awareness, not knowing how to get it, eyestrain, and difficulty of reading are the main culprits for students not using e‐books more often. However, those who use e‐books report they are generally satisfied. Students would like to enjoy fewer restrictions on printing and copying, PDA accessibility, more titles in their area of studies and better e‐book readers. They do not usually read e‐books cover to cover. The library is not their main point of entry or search for e‐books. Students value portability, instant access, light weight and ability to store large amounts of materials.Research limitations/implicationsThe sample population was limited to the classes which had access to an e‐textbook. A broader and more complete understanding could have been obtained if the study included all of the student population. It is not possible to generalize the findings due to the fact that the study was done in a specific academic setting.Practical implicationsUniversities and libraries are highly engaged in this topic at the present moment. Results of studies like this one will provide data useful for collection development policies and the pedagogy adopted by faculty in the classroom.Social implicationsThis is a topic that is of increasing importance in all parts of the world, and is affecting how people and, more specifically, students read and learn. It has the potential of changing reading habits and how students absorb information and knowledge, as well as how they use libraries.Originality/valueE‐books will have a definitive impact in new models of acquiring, accessing, and distributing information materials for and to the academic community. The paper will help the library better understand students' preferences and study habits which will have an impact on decisions regarding types of services it should provide and collection building decisions.

Rechargeable batteries are being intensively investigated in an attempt to solve the energy issues while meeting the environmental demands. Even though Li-ion batteries (LIB) with high energy and light weight have been commercialized within the last 20 years, these devices currently require higher energy density, output power and sustainability characteristics. The atomic behavior of Li ion that determines LIB's performance is hardly characterized by transmission electron microscopy (TEM) owing to its weak electron-scattering power. In this sense, annular bright-field (ABF) scanning TEM (STEM), in which the contrast has a low scaling rate with the atomic number, has been proven to be a robust technique for simultaneous imaging of light and heavy elements. The s-state model, in which electron channeling along the atomic column allows the intensity to be focusing in the forward direction, has successfully explained the theory of ABF contrast. Furthermore, the detector angle range, the defocus-thickness dependence and the accelerating voltage (among other parameters) were discussed for optimized imaging conditions. ABF-STEM has shown powerful capabilities in resolving the atomic structure and the chemistry of electrodes (e.g. Li-ion occupation and diffusion, phase transformation and interface reaction), thereby providing critical insights into the physical properties, the battery performance and the design guidance of LIB. The future directions of ABF imaging for the characterization of LIB materials were also reviewed.

This paper presents the initial work and remaining scope of a RPSEA sponsored project to develop, qualify, and field deploy flexible fiber reinforced pipe (FFRP®) for ultra-deepwater applications. FFRP is unbonded flexible pipe with composite reinforcement layers which has the advantages of light weight, high flexibility, and corrosion resistance. Due to these advantages, a simple, low top tension riser configuration is enabled. The initial design basis is a 7-inch ID, 690 barg design pressure, 120°C design temperature, 3000 meter design water depth production riser for a Gulf of Mexico application. The Phase 1 Engineering Study will confirm the product and system design to be employed in the subsequent phases. In Phase 2, a prototype pipe will be manufactured, and qualification testing will be conducted in accordance with API RP 17B recommendations. With successful testing, and subject to approval via a Phase 2 decision stage gate, Phase 3 will be an actual field deployment of the riser system with six months of performance monitoring. The paper includes a summary of the project plan for Phase 1, the product technology, the design basis, and presents the initial pipe concept. Engineering analysis to confirm the suitability of the pipe concept, and the riser configuration are underway in accordance with the project plan. The top tension reduction offered by FFRP enables light weight and small footprint installation vessels and production platforms. FFRP enables installation vessels and floating production systems which previously had water depth limits of 1500 m to be used in ultra-deepwater of up to 3000 m, expanding the number of existing installation vessels and FPSO's that can be used in deepwater, substantially reducing overall project cost and risk. Introduction In April 2011 the Research Partnership to Secure Energy for America (RPSEA) ultra-deepwater (UDW) program issued a request for proposal for Need 4: Dry Trees and Risers in 10,000 Feet (3000 m) Water Depth. The RFP [1] included Technical Area of Interest 4402 - Qualification of Flexible Fiber Reinforced Pipe for 10,000-Foot Water Depths. In June 2011, DeepFlex submitted a proposal responsive to the RFP and was awarded the project in October 2012. The project has been started and is being conducted in three phases:Phase 1 - Engineering StudyPhase 2 - Prototype manufacturing and qualification testingPhase 3 - Field deployment supply The Phase 1 Engineering Study consists of the design premise and design report, riser system configuration & analysis report, Failure Mode, Effects and Criticality Analysis (FMECA) report, manufacturing documentation for prototype, and Phase 2 qualification plan and proposal.

Detecting spreaders can help an intrusion detection system identify potential attackers. The existing work can only detect aggressive spreaders that scan a large number of distinct addresses in a short period of time. However, stealthy spreaders may perform scanning deliberately at a low rate. We observe that these spreaders can easily evade the detection because their small traffic footprint will be covered by the large amount of background normal traffic that frequently flushes any spreader information out of the intrusion detection system's memory. We propose a new streaming scheme to detect stealthy spreaders that are invisible to the current systems. The new scheme stores information about normal traffic within a limited portion of the allocated memory, so that it will not interfere with spreaders' information stored elsewhere in the memory. The proposed scheme is light weight; it can detect invisible spreaders in high-speed networks while residing in SRAM. Through experiments using real Internet traffic traces, we demonstrate that our new scheme detects invisible spreaders efficiently while keeping both false-positives (normal sources misclassified as spreaders) and false-negatives (spreaders misclassified as normal sources) to low level.

This paper presents proposed requirements for qualifying composite reinforcement for the hoop and tensile reinforcement layers of unbonded flexible pipe, and progress towards meeting those requirements by one manufacturer. Due to lighter weight and resistance to corrosion and fatigue, composite materials are being implemented for the hoop and tensile reinforcement in unbonded flexible pipe. By reducing the weight of the pipe up to 50% or more, riser system and installation top tensions are substantially reduced. The lower weight and tension reduces project CAPEX, installation cost and risk by enabling lighter weight capacity floating production systems and installation vessels. Currently ISO 13628-2/API 17J Specification for Unbonded Flexible Pipe [1] does not apply to composite reinforcement, largely because of the limited operational experience with composite materials. Proposed requirements to be included in Annex H of API 17B Recommended Practice for Flexible Pipe [2] as guidelines for composite armour, are summarized in the paper. As operational experience is gained, it will be proposed to include these requirements and learnings in a future revision of ISO 13628-2/API 17J. The efforts of one manufacturer to develop and implement a design methodology and qualification program to meet the proposed requirements are presented. Most flexible pipe manufacturers are in various stages of developing and commercializing unbonded flexible pipe with composite armour. Yet, there has not been agreement in the flexible pipe community on product requirements. Without industry concurrence on requirements, manufacturers can expend significant funds developing and qualifying a design methodology which does not meet target requirements. This paper describes the first effort to obtain industry consensus on target requirements for unbonded flexible pipe with composite armour.

The purpose of the article is to find ways to solve the problem of making custom solutions in conditions of uncertainty, risk, poorly structured processes for the development of new product designs with characteristics that meet the rapidly changing needs of the business environment. The solution uses the method of prioritization with expert assessments. The author identifies the existing shortcomings of the methods of prioritization and suggests changes and additions that eliminate the shortcomings in relation to the problem being solved. The developed model, when used in management decision-making, allows us to identify the best functions of the product for their inclusion in the design of an innovative model, to make a rating of the significance of functional properties for the consumer and the manufacturer, which contributes to maximizing demand and competitiveness of the created model, operational innovative changes in the properties of the product corresponding to the rapidly changing demands of the competitive business environment. The article is intended for business leaders, researchers, university students.

This chapter describes one of the three case studies designed to evaluate and exploit novel information management technology from the ACTIVE project. The applications are designed to support professionals working in telecommunications to respond to customer requirements, for example to create customer proposals. The quality and timeliness of those proposals, and of their response to customers in general, are key to success in a very demanding business environment. Our goal in this case study was to determine how ACTIVE technology can help these people to help their customers better. A main task of the prospective users, who interact directly with customers, is to understand customer requirements and translate those requirements into customer proposals. AKWS, a tool for managing information, was recognized to include effective context-based information delivery features, including the use of machine intelligence, which the users consider valuable in helping to combat information overload and mitigate the disruptive effect of changes of task focus. The Bid Unit Wiki was designed for a team in a central bid proposal unit whose job was to coordinate the creation of large business proposals, i.e. proposals which were too complex for the first group to create on their own. The users found the SMW valuable as a tool for collaboration between the bid team and the technical specialists who contributed to the proposals.