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Topic: Linear density


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In the News (Sat 28 Nov 09)

  
  Patent 5213151: Melt overflow control for constant linear density fiber mat and strip
The linear volume of the strip is primarily a function of the thickness of the strip and is desirably kept substantially constant as in the case of the fiber mat.
Linear volume is a measure of the length and width along the longitudinal direction of the continuous metal strip or continuous fiber mat, assuming the volume to be constant across the longitudinal axis, i.e.
Linear volume denotes the mass per unit length of a material, whereas the more common volumetric density is a measure of the mass per unit volume of material.
www.freepatentsonline.com /5213151.html   (5301 words)

  
 Areal Density
The linear density of a disk is not constant over its entire surface--bear this in mind when reading density specifications, which usually list only the maximum density of the disk.
The reason that density varies is because the lengths of the tracks increase as you move from the inside tracks to the outside tracks, so outer tracks can hold more data than inner ones.
The reason is that the areal density of the disk impacts both of the key hard disk performance factors: both positioning speed and data transfer rate.
www.storagereview.com /map/lm.cgi/areal_density   (1209 words)

  
 Linear density - Wikipedia, the free encyclopedia
Linear density or Linear mass is a measure of mass per unit of length, and it is a characteristic of strings or one-dimensional objects.
The SI unit of linear density is the kilogram per metre (kg/m).
μ is the linear mass of the string (measured in kilograms per metre)
en.wikipedia.org /wiki/Linear_density   (105 words)

  
 Patent 5153869: Apparatus for recording information on an optical disk with a modified constant linear density system
In other words, the constant linear density system provides a constant recording density by increasing the data transfer frequency in proportion to a change in position of the optical head on the optical disk or the recording position toward the outermost track.
In this case, since the number of rotations of the optical disk 1 or the angular velocity is constant, the record pit pitch on the track with a radius 2r is 2l where l is the record pit pitch on the track with a radius r.
Further, data recording is done in such a way that the linear density becomes lower (the recording pit pitch becomes larger) as the recording position moves outward.
www.freepatentsonline.com /5153869.html   (6323 words)

  
 IngentaConnect Linear density response in the random-phase approximation for con...   (Site not responding. Last check: 2007-11-04)
IngentaConnect Linear density response in the random-phase approximation for con...
Linear density response in the random-phase approximation for confined Bose vapours at finite temperature
This approach is naturally introduced in a two-fluid description by expressing the density response of both the condensate and the non-condensate in terms of the response of a Hartree - Fock reference gas to the self-consistent Hartree - Fock potentials.
api.ingentaconnect.com /content/iop/jphyscm/1997/00000009/00000046/art00019   (265 words)

  
 美国专利申请公开说明书 20040061882 - Image processing apparatus including low-linear-density dot region ...   (Site not responding. Last check: 2007-11-04)
An image processing apparatus includes a maximum/minimum density detecting unit which detects a center pixel of a matrix of N×N pixels in image data that has a maximum or minimum density.
A determination unit determines whether the absolute value of a difference between an average of densities of diagonal pixels of the matrix and a density of the center pixel is larger than a threshold value.
A peak pixel detecting unit detects peak pixels of the matrix, each peak pixel being the center pixel having a maximum or minimum density, and the absolute value of the difference with respect to the center pixel being larger than the threshold value.
cxp.paterra.com /uspregrant20040061882cn.html   (195 words)

  
 Astron. Astrophys. 321, 1007-1020 (1997)   (Site not responding. Last check: 2007-11-04)
It appears that the differential acceleration due to the density waves is comparable to the differential acceleration due to the axisymmetric differential rotation even if the perturbation of interstellar gas is at the limit of linear regime.
The periodic acceleration is directed toward the density concentrations and the derivative of the periodic acceleration is in phase with the potential perturbations.
This means that the density wave tends to decrease the differential force in arms and increase it in the interarm regions.
aa.springer.de /papers/7321003/2301007/sc3.htm   (3358 words)

  
 D1577-96 Standard Test Methods for Linear Density of Textile Fibers   (Site not responding. Last check: 2007-11-04)
Note 1—For linear density of short lengths of yarn, refer to Test Method D 1059.
For cotton linear density, refer to Test Methods D 1769, and D 2480.
1.2 The crimp, taper and cross-sectional shape of the fiber may influence the linear density measured by single-fiber weighing and vibroscope.
www.astm.org /DATABASE.CART/HISTORICAL.OLD/D1577-96.htm   (273 words)

  
 T01A Linear Density of Yarn From Packages
This method is applicable to single or plied yarns prewound onto packages such as a cone or cheese, to balls of hand knitting yarn and to skeins after winding into a ball.
The skeins are weighed and the linear density of the yarn calculated in units of tex (grams per kilometre).
A tolerance of +/- 3% of nominal linear density is usually acceptable.
www.awta.com.au /Textiles/Publications/Product_notes/T01A.htm   (181 words)

  
 Linear Density of OPTIM fibres, X-sectional Profile and Fibre Structure   (Site not responding. Last check: 2007-11-04)
Linear Density of OPTIM fibres, X-sectional Profile and Fibre Structure
The diameter reduction of OPTIM™ fibres is more precisely expressed as a change in linear density measurement, since the fibres are not approximating circles in X-section anymore.
Linear density is used more frequently in competing fibre industries and is expressed as decitex (g/10km).
www.tft.csiro.au /achievements/optimstxandld.html   (239 words)

  
 T40D Pile Yarn Linear Density (Mass Per Unit Length of Pile Yarns for Carpets)
The method is applicable to tuft or loop pile yarn in all types of textile floor coverings, EXCEPT where the tuft or loop length is less than 18mm in latex backed textile floor coverings.
Measured linear density should be within + 5 percent of nominal.
It should be noted that this test gives an indication of the yarn linear density and overall accuracy of this method can vary widely for different carpet types.
www.awta.com.au /Textiles/Publications/Product_notes/T40D.htm   (153 words)

  
 Linear density -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-11-04)
Linear density -- Facts, Info, and Encyclopedia article
For other meanings of density, see (Click link for more info and facts about Density (disambiguation)) Density (disambiguation)
L is the total (The linear extent in space from one end to the other; the longest horizontal dimension of something that is fixed in place) length of the string (measured in metres)
www.absoluteastronomy.com /encyclopedia/L/Li/Linear_density.htm   (114 words)

  
 Linear density perturbation in relativistic and Brans-Dicke cosmologies
Linear density perturbation in relativistic and Brans-Dicke cosmologies
Linear density perturbation equation for general relativistic cosmologies using the homogeneous isotropic Robertson-Walker metric and the anisotropic Bianchi-I metric for the unperturbed model has been derived in a simple and rather general manner.
Two coupled differential equations connecting variations in the density rho and the scalar field phi of the model have been obtained.
stacks.iop.org /0305-4470/10/189   (235 words)

  
 Near infrared spectra of pellets and thin films of high-density, low-density and linear low-density polyethylenes and ...
The aim of the present study is to investigate in detail the near infrared (NIR) spectra of the three types of polyethylene, linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE) and high-density polyethylene (HDPE), and to develop calibration models that predict their physical properties such as density, crystallinity and melting point.
The effects of spectral resolution on the classification and the prediction of density for the three types of PE have been investigated.
The correlation coefficient for the density was calculated to be 0.9898, 0.9928, 0.9925 and 0.9872 for the spectra obtained at 2, 4, 8 and 16 cm
www.nirpublications.com /abs/J11_0309.html   (444 words)

  
 [WHSG97]   (Site not responding. Last check: 2007-11-04)
This article presents the density estimation framework for generating view-independent global illumination solutions.
It works by probabilistically simulating the light flow in an environment with light particles that trace random walks originating at luminaires and then using statistical density estimation techniques to reconstruct the lighting on each surface.
A new local linear density estimation technique eliminates boundary bias and extends to arbitrary polygons.
www.graphics.cornell.edu /pubs/1997/WHSG97.html   (162 words)

  
 D6717-01 Standard Test Method for Linear Density of Elastomeric Yarns (Skein Specimens)
1.1 This test method covers the determination of the linear density of "as produced" elastomeric yarns made from rubber, spandex or other elastomers using a skein.
For the determination of linear density of elastomeric yarns using short length specimens, refer to Test Method D 2591.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
www.astm.org /DATABASE.CART/PAGES/D6717.htm   (239 words)

  
 Universal linear density of states for tunneling into the 2DEG in magnetic field   (Site not responding. Last check: 2007-11-04)
A novel capacitance technique is used to measure the tunneling density of states (TDOS) of the two-dimensional electron gas (2DEG) as a function of both electron density and excitation energy.
For low electron densities, disorder and e-e interactions produce a TDOS suppression that is logarithmic in excitation near the Fermi energy.
However, counter to expectations for a simple Coulomb gap the slopes of the linear gap are strongly field dependent.
flux.aps.org /meetings/YR97/BAPSMAR97/abs/S5110005.html   (253 words)

  
 A bandwidth selector for local linear density estimators, Ming-Yen Cheng
A bandwidth selector for local linear density estimators
Local linear density estimators achieve automatic boundary corrections and enjoy some typical optimal properties.
The bandwidth is very efficient regardless of whether there are non-smooth boundaries in the support of the density or not.
projecteuclid.org /getRecord?id=euclid.aos/1069362735   (98 words)

  
 Non-linear density modulation
Since we are interested in the local non-linear modifications to the TAE mode structure, we concentrate on the region
) matches the linear solution, no longer exists, because of the appearance of bifurcations in the mode structure, i.e.
This result confirms the fact that the efficiency of mode-mode couplings in determining the TAE amplitude at saturation greatly depends on the location of the linear mode frequency within the toroidal gap, i.e.
efrw01.frascati.enea.it /~vlad/Papers/review_RNC_2/node19.html   (388 words)

  
 LAD 4290
Linear Low Density (LLDPE) Liners are absolutely unique in the market.
Where most manufactures use a standard linear low density material, or upgrade to a Hexene resin, our bags are manufactured with premium Octene, the highest grade of LLDPE resin available.
All bags over 31" long are star sealed and double sealed for triple strength.
www.hillas.com /PTech.asp?Item=17939   (95 words)

  
 IngentaConnect On-Line Monitoring of the Density of Linear Low-Density Polyethyl...   (Site not responding. Last check: 2007-11-04)
This paper reports on-line monitoring of the density of linear low-density polyethylene (LLDPE) by near-infrared (NIR) spectroscopy and chemometrics.
The sample sets for developing prediction models were collected for three months at the plant, and the density of LLDPE was continuously monitored on-line for another three months using the model.
The standard error of prediction (SEP) for the on-line monitoring of the density of LLDPE at the plant was ±2.1 mg/cm
www.ingentaconnect.com /content/sas/sas/2004/00000058/00000002/art00016   (269 words)

  
 Global Illumination Using Local Linear Density Estimation - Walter, Hubbard, Shirley, Greenberg (ResearchIndex)   (Site not responding. Last check: 2007-11-04)
Abstract: This paper presents the density estimation framework for generating view#independent global illumination solutions.
It works by probabilis# ticly simulating the light #ow in an environment with light particles that trace random walks originating at luminaires and then using statistical density estimation techniques to reconstruct the lighting on each surface.
The first one is hierarchical radiosity [9] the second one is kernel density estimation as introduced in Walter et al.
citeseer.ist.psu.edu /walter97global.html   (478 words)

  
 Linear momentum density in quasistatic electromagnetic systems
We discuss a couple of simple quasistatic electromagnetic systems in which the density of electromagnetic linear momentum can be easily computed.
The examples are also used to illustrate how the total electromagnetic linear momentum, which may also be calculated by using the vector potential, can be understood as a consequence of the violation of the action–reaction principle, because a non-null external force is required to maintain constant the mechanical linear momentum.
We show how one can avoid the divergence in the interaction linear electromagnetic momentum of a system composed by an idealization often used in textbooks (an infinite straight current) and a point charge.
stacks.iop.org /0143-0807/25/555   (240 words)

  
 Maximum Local Linear Power Density
The  maximum  local  linear  power  density  when  compared  to  the  average  linear  power  density
the power densities and, thus, the flux in the radial and axial planes of the core.
channel factor is known, the maximum local linear power density anywhere in the core can be
www.tpub.com /content/doe/h1012v2/css/h1012v2_70.htm   (151 words)

  
 Surface properties and in vitro functional capacities of human T lymphocyte subsets separated by linear density ...   (Site not responding. Last check: 2007-11-04)
Surface properties and in vitro functional capacities of human T lymphocyte subsets separated by linear density gradients -- Huber et al.
Surface properties and in vitro functional capacities of human T lymphocyte subsets separated by linear density gradients
T cell density classes obtained from identical organs as well as the
www.jimmunol.org /cgi/content/abstract/123/1/405   (251 words)

  
 EconPapers: Local Linear Density Estimation for Filtered Survival Data, with Bias Correction
Abstract: A class of local linear kernel density estimators based on weighted least squares kernel estimation is considered within the framework of Aalen's multiplicative intensity model.
This model includes the filtered data model that, in turn, allows for truncation and/or censoring in addition to accomodating unusual patterns of exposure as well as occurrence.
It is shown that the local linear estimators corresponding to all different weightings have the same pointwise asymptotic properties.
econpapers.hhs.se /paper/hhbaarfin/2003_5F009.htm   (374 words)

  
 Home Page of Density Functional Theory
The first Hohenberg-Kohn theorem asserts that the density of any system determines all ground-state properties of the system, that is, E=E[n0], where n0 is the ground-state density of the system.
The wavefunction psi of an N-electron system includes 3N variables, while the density, no matter how large the system is, has only three variables x, y, and z.
Formulation along this line provides the possibility of the linear scaling algorithm currently in fashion, whose computational complexity goes like O(NlogN), essentially linear in N when N is very large.
www.unc.edu /~shubin/dft.html   (331 words)

  
 D1577-96 Standard Test Methods for Linear Density of Textile Fibers   (Site not responding. Last check: 2007-11-04)
Note 1-For linear density of short lengths of yarn, refer to Test Method D1059.
1.3 These test methods measure the linear density of fibers with a moisture regain in equilibrium with the standard atmosphere for testing.
1.4 The preferred method of measuring linear density is the direct weighing method.
amaec.kicet.re.kr /cd_astm/PAGES/D1577.htm   (269 words)

  
 Plastics Industry Trades Futures
Seattle, WA, USA--(Jobwerx News)--Polypropylene and linear low-density polyethylene plastics futures contracts opens on The London Metal Exchange.
New trading of two plastics futures at the LME opened today via the electronic trading system and the new financial tool will help Plastics Companies manage their price exposure to volatile polymer prices.
The two new Futures contracts are Polypropylene and Linear Low-Density Polyethylene.
www.jobwerx.com /news/Archives/plastics_biz-id=947228_617.html   (426 words)

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