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Variational path profiling

E. Perelman, T. Chilimbi, B. Calder
2005 14th International Conference on Parallel Architectures and Compilation Techniques (PACT'05)  
In this paper we present a new type of profiling analysis called Variational Path Profiling (VPP).  ...  We present a profiling and analysis approach to find these variational paths, so that they can be communicated back to a programmer to guide optimization.  ...  Variational Path Profiling In this section we describe the sampling approach used to gather the variational path profiles.  ... 
doi:10.1109/pact.2005.41 dblp:conf/IEEEpact/PerelmanCC05 fatcat:vqmfc5buovfblp76zxklcei6bm

Analysis of the Effect of Process Parameters on Part Wall Thickness Variation in Conventional Metal Spinning of Cr-Mn Austenitic Stainless Steels

Peter Šugár, Jana Šugárová, Ján Petrovič
2016 Strojniski vestnik  
of the tool path profile and feed ratio effect on wall thickness variation.  ...  Feed ratio and roller path profile are statistically significant factors governing wall thickness variation.  ...  The most significant effect of tool path profile on the wall thickness variation is clearly seen in both measured areas.  ... 
doi:10.5545/sv-jme.2015.2901 fatcat:5mppq3zmcvfm3h5k54w2mbxoc4

Specific Differential Phase Estimation in the Presence of Nonuniform Rainfall Medium along the Path

Eugenio Gorgucci, Gianfranco Scarchilli, V. Chandrasekar
1999 Journal of Atmospheric and Oceanic Technology  
Three models for nonuniform reflectivity variation along the precipitation path are studied.  ...  It is shown that the estimate of specific differential phase over a nonuniform rainfall path is biased, and the bias increases with increased reflectivity variation along the path.  ...  However, the bias is independent of the sign of the reflectivity variations because of symmetry of K DP and ⌽ DP profiles about the uniform path model profile.  ... 
doi:10.1175/1520-0426(1999)016<1690:sdpeit>2.0.co;2 fatcat:vonagcf6lrb2vp2qnhrrb2vuua

Statistics of short time and spatial variations measured in wideband indoor radio channels

R. Ganesh, K. Pahlavan
1993 IEE Proceedings H (Microwaves Antennas and Propagation)  
The statistics of RMS delay spread and the received power in the multipath profiles are computed and compared for these experimental variations.  ...  The database is divided into two classes: spatial and short time variations.  ...  This is because there are usually more paths in an OLOS than in an LOS profile and hence fluctuations also occur in more paths in an OLOS profile.  ... 
doi:10.1049/ip-h-2.1993.0045 fatcat:ti7ktw6fnzevhlmg6q2orb6kea

System-level variation-aware aging simulator using a unified novel gate-delay model for bias temperature instability, hot carrier injection, and gate oxide breakdown

Taizhi Liu, Chang-Chih Chen, Soonyoung Cha, Linda Milor
2015 Microelectronics and reliability  
SPICE (100 paths from STA) SPICE (100 paths from our PVT-aging aware method) Circuit Delay (ns) Frequency © 2015. This manuscript version is made available under the Elsevier user license  ...  A framework is proposed to analyze system-level reliability and evaluate the lifetimes of state-of-art microprocessors considering the impact of process-voltage-temperature (PVT) variations and device  ...  circuit netlist, RC parasitics (.spef), process-variation spatial correlation profile, BTI ∆Vth profile, HCI ∆Vth profile, GOBD RG2S/RG2D profile, thermal profile, IR-drop profile Output: Circuit-delay  ... 
doi:10.1016/j.microrel.2015.06.008 fatcat:ra6vbzj3abhbtb6zzgam44znsa

Page 591 of Geophysics Vol. 22, Issue 3 [page]

1957 Geophysics  
It will not follow any individual ray path if velocity or dip variations exist.  ...  It is seen that the locus of reflections is af- fected only slightly by velocity variations and curved ray paths, but is highly sensitive to dip changes within the section.  ... 

CFD geometrical optimization to improve mixing performance of axial mixer

Toshihiro Hanada, Kenji Kuroda, Koji Takahashi
2016 Chemical Engineering Science  
The axial mixer was improved for reducing the long variation of the concentration. The element tip geometry and the configurations of the branch paths were modified.  ...  The outlet concentration profile was smoothened. CFD and experimental results were including the comparison with Kenics-type mixer.  ...  (b) Output profiles at single pulse injection. (c) Concentration profiles at each branch path for elbow structure. (d) Concentration profiles at each branch path for blade structure.  ... 
doi:10.1016/j.ces.2016.01.029 fatcat:sw7bwvu4bzde5hlvwgnlen7nfi

Studying Stress Distribution under Steel Base Plates Using IPE Profiles

Seyed Athar, Marjan Sadrjamali, Mojtaba Noshahr
2015 Current World Environment  
Answer to this question that "whether stress distribution associated with IPB profiles is same as using IPE profiles or not" is our research's basis.  ...  In American code, effective stress distribution zone under base plates is considered as rectangular zone and this stress distribution corresponds with IPB profiles, while in Iran, IPE profiles are used  ...  distribution in steel base plates with IPE18 profiles (model a9) Fig. 10: assumed line 3 and line 4 paths with IPE profiles Fig. 11: Mises stress variations along line3 and line4 paths with IPE profiles  ... 
doi:10.12944/cwe.10.special-issue1.114 fatcat:57k5p7baaffdziuvpu346jzaoq

Variation of Peripapillary Retinal Nerve Fiber Layer Birefringence in Normal Human Subjects

Xiang-Run Huang, Harmohina Bagga, David S. Greenfield, Robert W. Knighton
2004 Investigative Ophthalmology and Visual Science  
This variation may result from known structural differences among nerve fiber bundles that serve different retinal regions. Constant ⌬n along bundles is consistent with this hypothesis.  ...  ⌬n profiles on circles of different diameter were similar, suggesting that ⌬n did not vary along nerve fiber bundles. CONCLUSIONS. RNFL birefringence varies with position around the ONH.  ...  To show the variation in the SLP measurement alone, one OCT scan path was used to extract an R profile from each of the three SLP images.  ... 
doi:10.1167/iovs.04-0110 pmid:15326123 fatcat:g7hycz3itncjbahvubggyai54i

Seismic ray path variations in a 3D global velocity model

Dapeng Zhao, Jianshe Lei
2004 Physics of the Earth and Planetary Interiors  
A three-dimensional (3D) ray tracing technique is used to investigate ray path variations of P, PcP, pP and PP phases in a global tomographic model with P wave velocity changing in three dimensions and  ...  with lateral depth variations of the Moho, 410 and 660 km discontinuities.  ...  Influence of lateral velocity variations The changes in travel time and ray path for the rays along profile AB are listed in Table 1 . The results for those in profile CD are listed in Table 2 .  ... 
doi:10.1016/j.pepi.2003.11.010 fatcat:hzspzaj3anaqtg3ae2rycq54kq

Page 321 of Journal of Aircraft Vol. 11, Issue 6 [page]

1974 Journal of Aircraft  
Several reports *:7-9 have investi- gated the sensitivity of these flight paths to parametric variations.  ...  The second part of this analysis will determine flight paths adjusted to be time optimal and fuel optimal for parametric variations.  ... 

X-ray laser pulses at the Fourier transform limit

P. Mistry, G. J. Tallents, M. H. Edwards
2007 Physical Review A. Atomic, Molecular, and Optical Physics  
Figure 7 : 7 (Color online) The variation in the degree of coherence with path difference for different actual gain coefficient length products G(0)L assuming a Voigt gain coefficient profile produced  ...  Figure 3 : 3 (Color online) The variation in the degree of coherence with path difference for different actual gain coefficient length products G(0)L assuming a Gaussian gain coefficient profile of frequency  ... 
doi:10.1103/physreva.75.013818 fatcat:s3cr3dgjejhxzcivqtibvwam3q

The Effect of Refractivity on Propagation at UHF and VHF Frequencies

I. Alam, N. Mufti, S. A. A. Shah, M. Yaqoob
2016 International Journal of Antennas and Propagation  
The correlation between the modelled path loss and experimental path loss is computed for refractivity distribution recommended by the ITU and predicted profiles.  ...  Different refractivity profiles are constructed based on meteorological data taken from the UK Meteorological Office in order to investigate the effects of refractivity on propagation.  ...  gradient above 102 m in the same manner as profile 1; however the tidal variations included in this profile make it different from profile 1.  ... 
doi:10.1155/2016/4138329 fatcat:bj4qm2gkangfdmggew3i4bkici

1985 [ITAL]Voyager 2[/ITAL] Radio Ranging Measurements of Coronal Density: Asymmetry in the Radial Profiles Explained

Richard Woo
1996 Astrophysical Journal  
It is shown that the disparity in radial profiles is not real but is instead caused by longitudinal variations stemming from the probing of significantly different source regions as revealed in the white-light  ...  raylike structures that permeate the corona, rather than in determining radial density profiles.  ...  The disparity in the Vo yager 2 density profiles is investigated in § 2 and shown to be the consequence of longitudinal variation.  ... 
doi:10.1086/309922 fatcat:2qrshup6vfh2xgc3rrbjmb27ba

Analytical models of optical refraction in the troposphere

Brett D. Nener, Neville Fowkes, Laurent Borredon
2003 Optical Society of America. Journal A: Optics, Image Science, and Vision  
An extremely accurate but simple asymptotic description (with known error) is obtained for the path of a ray propagating over a curved Earth with radial variations in refractive index.  ...  The result is sufficiently simple that analytic solutions for the path can be obtained for linear and quadratic index profiles.  ...  for the path to bend depends on the index profile slope locally.  ... 
doi:10.1364/josaa.20.000867 pmid:12747434 fatcat:nrse63fhcvcqbcpebnbkeshidy
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