Attitude Behavior of a Variable Mass Cylinder

1995 ◽  
Vol 62 (4) ◽  
pp. 935-940 ◽  
Author(s):  
F. O. Eke ◽  
Song-Min Wang
Keyword(s):  
Mass Loss ◽  
Variable Mass ◽  
Cylindrical Body ◽  
Rigid Bodies ◽  
Transverse Motion ◽  
Attitude Motion ◽  
Key Factors ◽  
Great Contrast ◽  
Attitude Behavior

This paper examines the attitude motion of a cylindrical body with mass loss. It is found that mass variation can have a substantial influence on the behavior of such a system. Specifically, the initial dimensions as well as the manner in which mass loss affects system inertia are found to be key factors in the determination of the characteristics of the lateral motion of the system. In great contrast to the attitude behavior of spinning rigid bodies, oblate variable mass cylinders exhibit divergent transverse attitude motion, while the transverse motion of prolate variable mass cylinders is found to be bounded in general.

Determination of PVC in Presence of Reactive Fillers

1987 ◽  
Vol 60 (2) ◽  
pp. 310-318 ◽  
Author(s):  
S. E. Walter
Keyword(s):  
Mass Loss ◽  
Variable Mass ◽  
Bulk Polymerization ◽  
Chlorine Content ◽  
Thermogravimetric Data ◽  
Organic Chlorine ◽  
Halogenated Polymers ◽  
Rule Out ◽  
Co2 Elimination

Abstract PVC content in thermoplastic materials can be determined from the total chlorine or more specifically from organic chlorine content. Organic chlorine content can be determined by ASTM D 1551 using the described modifications. Presence of reactive fillers such as CaCO3 results in large negative errors. When reactive fillers are expected to be present, the quantity of PVC should be determined with methods measuring total chlorine or by TGA. TGA can be used successfully for the analysis of such samples. Plasticizers and PVC stabilizers are extracted before analysis to eliminate interfering or variable mass loss in PVC thermograms. This technique can also be used for the analysis of PVC/NBR mixtures. In unknown compounds, the technique should be used in conjunction with FTIR analysis to facilitate polymer identification and to rule out interference by other halogenated polymers. Excess of unreacted CaCO3 can be observed and the amount determined from thermograms. Remaining CaCO3 can be determined from mass loss due to elimination of CO2. If a cooling step is introduced before the atmosphere is switched from nitrogen to air, a clearer separation of residue oxidation and CO2 elimination are obtained. On reheating, residue oxidation then takes place between 450 and 500°C, well separated from CO2 elimination at about 700°C. Variation of thermograms using PVC obtained by different polymerization procedures needs to be further investigated. Structural differences and thermal stability of PVC samples made by emulsion, suspension, and bulk polymerization have been examined by various techniques, but no thermogravimetric data are given.

scholarly journals Predictions of variable mass loss for Luminous Blue Variables

2002 ◽  
Vol 393 (2) ◽  
pp. 543-553 ◽  
Author(s):  
Jorick S. Vink ◽  
A. de Koter
Keyword(s):  
Mass Loss ◽  
Variable Mass ◽  
Luminous Blue Variables

Closed-Form Determination of the Location of a Rigid Body by Seven In-Parallel Linear Transducers

1996 ◽  
Author(s):  
Carlo Innocenti
Keyword(s):  
Rigid Body ◽  
Linear Equations ◽  
Parallel Manipulators ◽  
Rigid Bodies ◽  
Body Location ◽  
Position And Orientation ◽  
General Geometry ◽  
Two Bodies

Abstract The paper presents an original analytic procedure for unambiguously determining the relative position and orientation (location) of two rigid bodies based on the readings from seven linear transducers. Each transducer connects two points arbitrarily chosen on the two bodies. The sought-for rigid-body location simply results by solving linear equations. The proposed procedure is suitable for implementation in control of fully-parallel manipulators with general geometry. A numerical example shows application of the reported results to a case study.

scholarly journals Variability in X-ray line ratios in helium-like ions of massive stars: the wind-driven case

2019 ◽  
Vol 625 ◽  
pp. A86 ◽  
Author(s):  
R. Ignace ◽  
Z. Damrau ◽  
K. T. Hole
Keyword(s):  
Mass Loss ◽  
Massive Stars ◽  
Mass Loss Rate ◽  
Variable Mass ◽  
Line Ratio ◽  
High Spectral Resolution ◽  
X Rays ◽  
Wind Integration ◽  
X Ray ◽  
Wind Variability

Context. High spectral resolution and long exposure times are providing unprecedented levels of data quality of massive stars at X-ray wavelengths. Aims. A key diagnostic of the X-ray emitting plasma are the fir lines for He-like triplets. In particular, owing to radiative pumping effects, the forbidden-to-intercombination line luminosity ratio, R = f∕i, can be used to determine the proximity of the hot plasma to the UV-bright photospheres of massive stars. Moreover, the era of large observing programs additionally allows for investigation of line variability. Methods. This contribution is the second to explore how variability in the line ratio can provide new diagnostic information about distributed X-rays in a massive star wind. We focus on wind integration for total line luminosities, taking account of radiative pumping and stellar occultation. While the case of a variable stellar radiation field was explored in the first paper, the effects of wind variability are emphasized in this work. Results. We formulate an expression for the ratio of line luminosities f∕i that closely resembles the classic expression for the on-the-spot result. While there are many ways to drive variability in the line ratio, we use variable mass loss as an illustrative example for wind integration, particularly since this produces no variability for the on-the-spot case. The f∕i ratio can be significantly modulated owing to evolving wind properties. The extent of the variation depends on how the timescale for the wind flow compares to the timescale over which the line emissivities change. Conclusions. While a variety of factors can ellicit variable line ratios, a time-varying mass-loss rate serves to demonstrate the range of amplitude and phased-dependent behavior in f∕i line ratios. Importantly, we evaluate how variable mass loss might bias measures of f∕i. For observational exposures that are less than the timescale of variable mass loss, biased measures (relative to the time-averaged wind) can result; if exposures are long, the f∕i ratio is reflective of the time-averaged spherical wind.

Investment apportionments among participants of PPP rental retirement villages

2019 ◽  
Vol 10 (1) ◽  
pp. 64-77
Author(s):  
Shijing Liu ◽  
Hongyu Jin ◽  
Chunlu Liu ◽  
Benzheng Xie ◽  
Anthony Mills
Keyword(s):  
Pension Funds ◽  
Return Rate ◽  
Key Factors ◽  
Content Type ◽  
Factors Affecting ◽  
Investment Allocation ◽  
Research Findings ◽  
The Government ◽  
Mean Variance

Purpose The purpose of this paper is to examine public–private partnership (PPP) approaches for the construction of rental retirement villages in Australia and to allocate the investment proportions under a certain project return rate among three investors which are the government, private sectors and pension funds. The apportionment will achieve a minimum overall investment risk for the project. Design/methodology/approach Capital structure, particularly determination of investment apportionment proportions, is one of the key factors affecting the success of PPP rental retirement villages. Markowitz mean-variance model was applied to examine the investment allocations with minimum project investment risks under a certain projected return rate among the PPP partners for the construction of rental retirement villages. Findings The research findings validate the feasibility of the inclusion of pension funds in the construction of PPP rental retirement villages and demonstrate the existence of relationships between the project return rate and the investment allocation proportions. Originality/value This paper provides a quantitative approach for determination of the investment proportions among PPP partners to enrich the theory of PPP in relation to the construction of rental retirement villages. This has implications for PPP partners and can help these stakeholders make vital contributions in developing intellectual wealth in the PPP investment area while providing them with a detailed guide to decision making and negotiation in relation to investment in PPP rental retirement villages.

Determination of Knowledge, Attitude, Behavior about Genetically Modified Organisms in Nursing School Students

2013 ◽  
Vol 55 (4) ◽  
pp. 297 ◽  
Author(s):  
turker turker ◽  
necmettin kocak ◽  
Ibrahim Aydin ◽  
hakan istanbulluoglu ◽  
nuri yildiran ◽  
...  
Keyword(s):  
Genetically Modified Organisms ◽  
Genetically Modified ◽  
Nursing School ◽  
School Students ◽  
Attitude Behavior

scholarly journals Study on the Criteria for the Determination of the Road Load Correlation for Automobiles and an Analysis of Key Factors

Energies ◽  
2016 ◽  
Vol 9 (8) ◽  
pp. 575 ◽  
Author(s):  
Charyung Kim ◽  
Hyunwoo Lee ◽  
Yongsung Park ◽  
Cha-Lee Myung ◽  
Simsoo Park
Keyword(s):  
Key Factors ◽  
The Road ◽  
Road Load
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