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Maximum-Likelihood Sequence Detector for Dynamic Mode High Density Probe Storage [article]

Naveen Kumar, Pranav Agarwal, Aditya Ramamoorthy, Murti Salapaka
2010 arXiv   pre-print
There is an increasing need for high density data storage devices driven by the increased demand of consumer electronics.  ...  In this article, the high quality factor dynamic mode operation, that is less harsh on the media and the probe, is analyzed.  ...  existing schemes and confirm performance gains that can render the dynamic mode operation feasible for high density data storage purposes.  ... 
arXiv:0908.1789v2 fatcat:5c5hffkn4ncnlfifrffjm2pm2u

Maximum-Likelihood Sequence Detector for Dynamic Mode High Density Probe Storage

Naveen Kumar, Pranav Agarwal, Aditya Ramamoorthy, Murti Salapaka
2009 GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference  
There is an increasing need for high density data storage devices driven by the increased demand of consumer electronics.  ...  In this article, the high quality factor dynamic mode operation, that is less harsh on the media and the probe, is analyzed.  ...  existing schemes and confirm performance gains that can render the dynamic mode operation feasible for high density data storage purposes.  ... 
doi:10.1109/glocom.2009.5425369 dblp:conf/globecom/KumarARS09 fatcat:oexzgkd4gvfgnm25xw4imqxifq

Maximum-likelihood sequence detector for dynamic mode high density probe storage

Naveen Kumar, Pranav Agarwal, Aditya Ramamoorthy, Murti Salapaka
2010 IEEE Transactions on Communications  
There is an increasing need for high density data storage devices driven by the increased demand of consumer electronics.  ...  In this article, the high quality factor dynamic mode operation, that is less harsh on the media and the probe, is analyzed.  ...  existing schemes and confirm performance gains that can render the dynamic mode operation feasible for high density data storage purposes.  ... 
doi:10.1109/tcomm.2010.06.090197 fatcat:ds2wv7vtynecjhghmfvtun6ieu

Channel Modeling and Detector Design for Dynamic Mode High Density Probe Storage and Nano-imaging Applications

Naveen Kumar, Pranav Agarwal, Aditya Ramamoorthy, Murti Salapaka
2011 IFAC Proceedings Volumes  
The high quality factor dynamic mode operation, that is less harsh on the media and the probe, is analyzed.  ...  In probe based high density storage, we consider a data storage system that operates by encoding information as topographic profiles on a polymer medium.  ...  CONCLUSIONS AND FUTURE WORK We presented the dynamic mode operation of a cantilever probe with a high quality factor and demonstrated its applicability to a high-density probe storage system.  ... 
doi:10.3182/20110828-6-it-1002.03154 fatcat:fmho3klycnfvhdjg5gojcme2te

AFM Imaging?Reliable or Not?: Validation and Verification of Images in Atomic Force Microscopy

2013 IEEE Control Systems  
Instead of solving the maximum likelihood problem for detecting the entire sequence, a related problem is to obtain the a posteriori probability (APP) of a symbol ak based on the entire sequence of innovation  ...  For example, in [17] high areal density is enabled by encoding multiple levels in the height of the topographic features.  ... 
doi:10.1109/mcs.2013.2279475 fatcat:cn4yusmopfcitbjka3xvwvymjq

Topography detection using innovations mismatch method for high speed and high density dynamic mode AFM

Sayan Ghosal, Govind Saraswat, Aditya Ramamoorthy, Murti Salapaka
2013 2013 American Control Conference  
Data storage using this method can produce extremely high data storage density.  ...  The IM scheme utilizes the dynamic mode of operation and therefore is applicable to soft matter interrogation. In this work, IM method is shown to outperform previously developed techniques.  ...  In case of probe storage, suppose a single bit lasts for q oscillation cycles.  ... 
doi:10.1109/acc.2013.6580698 fatcat:d6odsrifpjgw5el5cmhr4kd734

High-speed nano-imaging using dynamic mode AFM: A MAP detection approach

Naveen Kumar, Govind Saraswat, Pranav Agarwal, Aditya Ramamoorthy, Murti Salapaka
2010 2010 Conference Record of the Forty Fourth Asilomar Conference on Signals, Systems and Computers  
In this work, we present a high speed one-bit imaging technique using dynamic mode AFM with a high quality factor cantilever.  ...  Next, we pose the imaging problem as one of finding the maximum a posteriori (MAP) symbol detector for this model. This is solved by adapting the BCJR algorithm for our channel model.  ...  In [6] , we have considered the development of a highdensity data storage device using dynamic mode AFM.  ... 
doi:10.1109/acssc.2010.5757853 fatcat:k2t5pyvfk5eclntw55u632sykq

Probe-based ultrahigh-density storage technology

A. Pantazi, A. Sebastian, T. A. Antonakopoulos, P. Bächtold, A. R. Bonaccio, J. Bonan, G. Cherubini, M. Despont, R. A. DiPietro, U. Drechsler, U. Dürig, B. Gotsmann (+14 others)
2008 IBM Journal of Research and Development  
The ultrahigh storage densities offered by probe-storage devices pose a significant challenge in terms of both control design for nanoscale positioning and read-channel design for reliable signal detection  ...  Ultrahigh storage densities can be achieved by using a thermomechanical scanning-probe-based data-storage approach to write, read back, and erase data in very thin polymer films.  ...  In 1996, she joined the Micro/Nanomechanics group at the Zurich Research Laboratory, working on silicon micromachining and processing techniques for probe-based storage array chips and processing-related  ... 
doi:10.1147/rd.524.0493 fatcat:kos3kcqur5bw5om2gtzaorvtla

Harnessing the transient signals in atomic force microscopy

Deepak R. Sahoo, Abu Sebastian, Murti V. Salapaka
2005 International Journal of Robust and Nonlinear Control  
In the existing dynamic-mode operation of atomic force microscopes (AFMs) steady-state signals like amplitude and phase are used for detection and imaging of material.  ...  Due to the high quality factor of the cantilever probe the corresponding methods are inherently slow.  ...  Researchers at IBM [10] have demonstrated areal densities of upto 3 TB=in 2 (for data storage), however, the reading is performed in static mode (contact mode) which results in signal deterioration due  ... 
doi:10.1002/rnc.1025 fatcat:26dfkflmdncepcqmbm2eon663i

Multiplexed on-demand storage of polarization qubits in a crystal

Cyril Laplane, Pierre Jobez, Jean Etesse, Nuala Timoney, Nicolas Gisin, Mikael Afzelius
2015 New Journal of Physics  
The temporal multiplexing allows us to increase the effective rate of the experiment by a factor of 5, which emphasizes the importance of multimode storage for quantum communication.  ...  Using spin refocusing techniques we can preserve the qubits for more than half a millisecond.  ...  We would like to thank Alexey Tiranov, Anthony Martin and Jonathan Lavoie for useful discussions, as well as Raphael Houlmann and Claudio Barreiro for technical support.  ... 
doi:10.1088/1367-2630/18/1/013006 fatcat:hqg7io7d5rguxfdf6rfcjlbqsy

Non-classical correlations between single photons and phonons from a mechanical oscillator

Ralf Riedinger, Sungkun Hong, Richard A. Norte, Joshua A. Slater, Juying Shang, Alexander G. Krause, Vikas Anant, Markus Aspelmeyer, Simon Gröblacher
2016 Nature  
The observed violation of a Cauchy-Schwarz inequality is clear evidence for the non-classical nature of the mechanical state generated.  ...  Due to their asymmetry, the maximum likelihood estimator of the classical bound is slightly lower than when using the individual maximum likelihood estimators g (2) cb,ML ≤ g (2) mm,ML · g (2) oo  ...  inject a red-detuned probe pulse to read out the modes phonon occupancy.  ... 
doi:10.1038/nature16536 pmid:26779950 fatcat:hjfetyayprdp7bsgtf6c2utjdi

Toward virtual biopsy through an all fiber optic ultrasonic miniaturized transducer: a proposal

A. Acquafresca, E. Biagi, L. Masotti, D. Menichelli
2003 IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control  
a posteriori estimation ........Functional point analysis ........Life estimation ........Maximum likelihood estimation ........Pose estimation ........State estimation ............Observers ........Yield  ...  ........Inference algorithms ........Machine learning algorithms ........Matching pursuit algorithms ........Maximum likelihood detection ........MLFMA ........Multicast algorithms ........Parallel algorithms  ... 
doi:10.1109/tuffc.2003.1244749 fatcat:l3jre4etsvcqzfyz2jqggji3gy

In Situ Visual Observation of Fracture Processes in Several High-Performance Fibers

Matthew Hudspeth, Ben Claus, Niranjan Parab, Boonhim Lim, Weinong Chen, Tao Sun, Kamel Fezza
2015 Journal of Dynamic Behavior of Materials  
Three different high-performance fibers have been imaged in situ during Kolsky bar tensile loading using two different techniques, namely optical microscopy and phase contrast imaging (PCI).  ...  S-2 Glass Ò failure was found to exhibit a brittle fracture mode at a single point, although post-mortem analysis commonly yielded disintegration of the fiber gauge length, which is concluded to occur  ...  Funding for this work has been provided by the Office of Naval Research, US ARMY PEO Soldier program, and the Materials in Extreme Dynamic Environments (MEDE) Collaborative Research Alliance for testing  ... 
doi:10.1007/s40870-015-0009-3 fatcat:6vxj4ftt3nfevcjs5yshxuq3wy

Globally Optimal Multi-target Tracking on a Hexagonal Lattice [chapter]

Anton Andriyenko, Konrad Schindler
2010 Lecture Notes in Computer Science  
The dynamic model, which encodes prior expectations about object motion, has been an important component of tracking systems for a long time, but has recently been dropped to achieve globally optimisable  ...  Experiments on five different recent benchmark sequences demonstrate the validity of our approach.  ...  In some cases the number of non-integer values without motion prior even becomes so high that it is no longer tractable to find an integral solution with branch-and-cut or probing.  ... 
doi:10.1007/978-3-642-15549-9_34 fatcat:v27khcflbvfpbh3zafst4oxlau

Image reconstruction for PET/CT scanners: past achievements and future challenges

Shan Tong, Adam M Alessio, Paul E Kinahan
2010 Imaging in Medicine  
the use of PET/CT imaging in patient care and in clinical research studies of pathophysiology and therapeutic interventions. kEywords: analytic reconstruction fully 3d imaging iterative reconstruction maximum-likelihood  ...  PET is a medical imaging modality with proven clinical value for disease diagnosis and treatment monitoring.  ...  Maximum-likelihood expectation-maximization image reconstruction uses maximum likelihood as the optimization criterion, and employs the expectation-maximization algorithm to find the maximum-likelihood  ... 
doi:10.2217/iim.10.49 pmid:21339831 pmcid:PMC3039307 fatcat:vzerxjghungkfb4fiwidyij3la
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