Measurement of Physical Environmental Parameters and Apparent Ventilation Rates Aboard Passenger Aircraft
Michael J. Murphy
As part of the ASHRAE RP-1262 Phase 1 study of the airliner cabin environment, measurements were made of physical environmental parameters aboard four passenger aircraft in revenue service. The objectives of these measurements were to measure physical environmental parameters and ventilation rates o ... [J. ASTM Int. 5, 101647 (2008)] published Fri May 16, 2008.
Geometric Modeling of Fluted Cutters
Puneet Tandon, Phalguni Gupta, and Sanjay G. Dhande
Geometries of cutting tools are usually represented by two-dimensional models. This paper outlines the construction of detailed computer aided design models for a variety of fluted cutters that includes slab mills, end mills, and drills; and establishes a new three-dimensional definition for the geo ... [J. Comput. Inf. Sci. Eng. 8, 021007 (2008)] published Fri May 16, 2008.
Sinklike spiral waves in oscillatory media with a disk-shaped inhomogeneity
Bing-Wei Li, Hong Zhang, He-Ping Ying, Wen-Qiang Chen, and Gang Hu
Spiral wave propagation in oscillatory media with a disk-shaped inhomogeneity is examined. Depending on the properties of the medium as well as the inhomogeneity (different frequencies in two regions), distinct spiral waves including sinklike spirals and dense-sparse spirals, are able to emerge. We ... [Phys. Rev. E 77, 056207 (2008)] published Thu May 15, 2008.
Experimental Investigation on Mechanical Properties of Plastic Pipes Reinforced by Cross Helically Steel Wires
Jinyang Zheng, Yubin Lu, Li Xiang, Xiufeng Lin, Yancong Zhu et al.
A Polyethylene (PE) pipe reinforced by a cross-winding steel wire (PSP) is a new type of plastic-matrix steel composite pipe, which has excellent performance. Its short-time burst pressure, strain, critical buckling pressure, and failure mode under various temperatures were investigated. Experimenta ... [J. Pressure Vessel Technol. 130, 021401 (2008)] published Thu May 15, 2008.
Modeling of Hydraulic Pipeline Transients Accompanied With Cavitation and Gas Bubbles Using Parallel Genetic Algorithms
Songjing Li, Chifu Yang, and Dan Jiang
Mathematical models of pressure transients accompanied with cavitation and gas bubbles are studied in this paper to describe the flow behavior in a hydraulic pipeline. The reasonable prediction for pressure transients in a low pressure hydraulic pipeline largely depends on several unknown parameters ... [J. Appl. Mech. 75, 041012 (2008)] published Wed May 14, 2008.
Optimal Winding Conditions of Flat Steel Ribbon Wound Pressure Vessels With Controllable Stresses
Chuanxiang Zheng and Shaohui Lei
Stress analysis of flat steel ribbon wound pressure vessels (FSRWPVs) is very difficult because they have a special discrete structure and complex pretensions exit in the flat steel ribbons, which are wound around the inner shell layer by layer. An analytical multilayered model for stress analysis i ... [J. Appl. Mech. 75, 041009 (2008)] published Wed May 14, 2008.
Vibration Analysis of a Floating Roof Taking Into Account the Nonlinearity of Sloshing
M. Utsumi and K. Ishida
The vibration of a floating roof hydroelastically coupled with nonlinear sloshing is analyzed. Influences of the nonlinearity of sloshing on the magnitude of stresses arising in a floating roof are investigated. Numerical results show that (i) neglecting the nonlinearity of sloshing significantly un ... [J. Appl. Mech. 75, 041008 (2008)] published Wed May 14, 2008.
Forced Oscillations of a Continuous Asymmetrical Rotor With Geometric Nonlinearity (Major Critical Speed and Secondary Critical Speed)
Imao Nagasaka, Yukio Ishida, and Jun Liu
Forced oscillations in the vicinities of both the major and the secondary critical speeds of a continuous asymmetrical rotor with the geometric nonlinearity are discussed. When the self-aligning double-row ball bearings support the slender flexible rotor at both ends, the geometric nonlinearity appe ... [J. Vib. Acoust. 130, 031012 (2008)] published Wed May 14, 2008.
A Time-Reversal Defect-Identifying Method for Guided Wave Inspection in Pipes
Fei Deng, Bin Wu, and Cunfu He
The temporal-spatial focusing effect of the time-reversal method on the guided wave inspection in pipes was investigated theoretically in the current research with a transfer function. The amplitude of the time-reversed wave propagating along the pipes was not only determined by the characteristics ... [J. Pressure Vessel Technol. 130, 021503 (2008)] published Tue May 13, 2008.
Mechanical Properties of Cold Bend Pipes
M. Sen, J. J. R. Cheng, D. W. Murray, and J. Zhou
Cold bends are frequently required in energy pipelines in order to change the vertical and horizontal orientations of the pipeline route. They are produced by plastically bending a pipe joint in a cold bending machine by creating a series of uniformly spaced incremental bends. This procedure acts to ... [J. Pressure Vessel Technol. 130, 021708 (2008)] published Tue May 13, 2008.
Collapse of Thick Tubes Pressurized From Outside: An Accurate Predictive Formula
Leone Corradi, Christian Ghielmetti, and Lelio Luzzi
Several engineering applications require cylindrical shells subjected to external pressure, and an increasing need for tubes of significant thickness has been experienced in recent years. So far, little study has been devoted to very stocky tubes, and a great amount of uncertainty exists on some imp ... [J. Pressure Vessel Technol. 130, 021204 (2008)] published Tue May 13, 2008.
Parametric Instability of an Axially Moving Belt Subjected to Multifrequency Excitations: Experiments and Analytical Validation
Guilhem Michon, Lionel Manin, Didier Remond, Regis Dufour, and Robert G. Parker
This paper experimentally investigates the parametric instability of an industrial axially moving belt subjected to multifrequency excitation. Based on the equations of motion, an analytical perturbation analysis is achieved to identify instabilities. The second part deals with an experimental setup ... [J. Appl. Mech. 75, 041004 (2008)] published Tue May 13, 2008.
Evaluation of Finishing Processes for Linen Fabrics Using the Kawabata Evaluation System
E. S. Namligoz, M. I Bahtiyari, A. E. Korlu, and S. Coban
The main problems of linen textiles are roughness, stiffness, and wrinkling tendency. To solve these problems, different finishing processes are necessary. The aim of this study is to investigate the effects of different finishing processes such as enzymatic treatment with cellulases, softening proc ... [J. Test. Eval. 36, 101461 (2008)] published Tue May 13, 2008.
Erratum: Self-Similarity of Complex Networks and Hidden Metric Spaces [Phys. Rev. Lett. [bold 100], 078701 (2008)]
M. Angeles Serrano, Dmitri Krioukov, and Marian Boguna
... [Phys. Rev. Lett. 100, 199902 (2008)] published Tue May 13, 2008.
Optical measurement system for error motions of small shafts
Kuang-Yuh Huang and Chen-Hsiu Yeh
The miniaturization trend has enhanced the rapid development of small precision machines. The operational performance of a precision machine is mainly determined by its bearing clearance, the balancing quality of its shafts, and the actuation smoothness of the rotating shafts. In comparison with lar ... [Opt. Eng. 47, 053601 (2008)] published Mon May 12, 2008.
Calibration of Palletized Workpiece Systems for Microfactories
Andrew Honegger, Shiv G. Kapoor, and Richard E. DeVor
Kinematic couplings have been used to create palletized system for part transfer in a microfactory. While kinematic couplings provide high repeatability, calibration is needed to achieve high interchangeability accuracy. In this paper, a generalized artifact-based methodology for pallet calibration ... [J. Manuf. Sci. Eng. 130, 031108 (2008)] published Mon May 12, 2008.
A Microstructure-Level Material Model for Simulating the Machining of Carbon Nanotube Reinforced Polymer Composites
Ashutosh Dikshit, Johnson Samuel, Richard E. DeVor, and Shiv G. Kapoor
A continuum-based microstructure-level material model for simulation of polycarbonate carbon nanotube (CNT) composite machining has been developed wherein polycarbonate and CNT phases are modeled separately. A parametrization scheme is developed to characterize the microstructure of composites havin ... [J. Manuf. Sci. Eng. 130, 031110 (2008)] published Mon May 12, 2008.
Networked Fuzzy Control System for a High-Performance Drilling Process
Rodolfo E. Haber-Guerra, Rodolfo Haber-Haber, Diego Martin Andres, and Angel Alique Palomar
The high-performance drilling (HPD) process has a significant impact on production in many industries, such as the automotive, die/mold and aerospace industries. However, cutting conditions for drilling are generally chosen from a machining-data handbook, requiring operator experience and skill. In ... [J. Manuf. Sci. Eng. 130, 031009 (2008)] published Mon May 12, 2008.
Geothermal Exploration Using Remote Sensing in the South of Baja California Sur, Mexico
Cristina Bancora and Rosa Maria Prol-Ledesma
The area from Ciudad Constitucion to Los Cabos in Baja California Sur was studied using a mosaic of four Landsat ETM+images. The main objective was to define favorable areas for utilization and exploitation of geothermal energy. The approach was to spectrally and spatially enhance the images to defi ... [AIP Conf. Proc. 1009, 180 (2008)] published Mon May 12, 2008.
A Survey On Management Of Software Engineering In Japan
Yasuo Kadono, Hiroe Tsubaki, and Seishiro Tsuruho
The purpose of this study is to clarity the mechanism of how software engineering capabilities relate to the business performance of IT vendors in Japan. To do this, we developed a structural model using factors related to software engineering, business performance and competitive environment. By an ... [AIP Conf. Proc. 1007, 267 (2008)] published Mon May 12, 2008.
Optimal inspection period and replacement policy for CBM with imperfect information using PHM
Alireza Ghasemi, Soumaya Yacout, and M-Salah Ouali
This chapter introduces a model which identifies the optimal inspection period for Condition Based Maintenance (CBM) of a system, when the information obtained from the data gathered on the system does not reveal the system's exact degradation state and the data collection is costly. The proposed mo ... [AIP Conf. Proc. 1007, 247 (2008)] published Mon May 12, 2008.
Functional Security Model: Managers Engineers Working Together
Edward Paul Guillen and Rulfo Quintero
Information security has a wide variety of solutions including security policies, network architectures and technological applications, they are usually designed and implemented by security architects, but in its own complexity this solutions are difficult to understand by company managers and they ... [AIP Conf. Proc. 1007, 117 (2008)] published Mon May 12, 2008.