Littérature scientifique sur le sujet « ISI-distance »
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Articles de revues sur le sujet "ISI-distance"
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Dusad, Sanket, Suhas N. Diggavi et A. Robert Calderbank. « Embedded Rank Distance Codes for ISI Channels ». IEEE Transactions on Information Theory 54, no 11 (novembre 2008) : 4866–86. http://dx.doi.org/10.1109/tit.2008.929960.
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Qu, Jingyi, Rubin Wang et Ying Du. « Measuring effects of different noises in a model using ISI-distance methods ». International Journal of Biomathematics 08, no 04 (22 juin 2015) : 1550043. http://dx.doi.org/10.1142/s1793524515500436.
Texte intégralRésumé :
This paper examines the effects of current and conductance noises in a minimal Hodgkin–Huxley type model of a cold receptor neuron. Current noise enters the membrane equation directly while conductance noise is propagated through the activation variables. Compared with common used interspike interval method, ISI-distance is a simple complementary approach to measure the different effects of current and conductance noises. ISI-distance extracts information from the interspike intervals by evaluating the ratio of instantaneous firing rates, which is parameter-free, time scale-independent and easy to visualize. Simulation results show that the most significant differences between different noise implementations in a pacemaker-like tonic firing regime at the transition to chaotic burst discharges.
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Setiarini, Agnes Tika. « Distance Learning For Music Practice In College : Benefits, Drawbacks, And Challenges ». Grenek Music Journal 10, no 2 (5 novembre 2021) : 43. http://dx.doi.org/10.24114/grenek.v10i2.27900.
Texte intégralRésumé :
The COVID-19 pandemic has impacted all sectors of human life globally, including the world of education. The world of education is forced to adapt by implementing a distance learning system to limit the mobility of educators and students. Program Studi D4 Penyajian Musik ISI Yogyakarta is one of the educational institutions that conduct distance learning. As a vocational education institution, ISI Yogyakarta helds many music practice courses to support its students' skills. This research aims to determine the benefits, drawbacks, and challenges of the distance learning system in music practice courses. This research is a qualitative study with 2 methods of data collection, namely in-depth interviews and questionnaires. Questionnaires were distributed to the respondents which are active students of the Prodi D4 Penyajian Musik, ISI Yogyakarta and will be confirmed by the results of in-depth interviews with the subject lecturers. The research results were formulated using the Miles & Huberman concept, namely: (1) data reduction; (2) data presentation; and (3) drawing conclusions (Miles & Huberman, 1984). The results of the study are concluding sentences about the benefits, drawbacks, and challenges of the distance learning method. These conclusions will be the basis for developing recommendations for the most effective distance learning process for the form of music practice lectures.
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Kang, Kukjin, et Shun-ichi Amari. « Discrimination with Spike Times and ISI Distributions ». Neural Computation 20, no 6 (juin 2008) : 1411–26. http://dx.doi.org/10.1162/neco.2007.07-07-561.
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We study the discrimination capability of spike time sequences using the Chernoff distance as a metric. We assume that spike sequences are generated by renewal processes and study how the Chernoff distance depends on the shape of interspike interval (ISI) distribution. First, we consider a lower bound to the Chernoff distance because it has a simple closed form. Then we consider specific models of ISI distributions such as the gamma, inverse gaussian (IG), exponential with refractory period (ER), and that of the leaky integrate-and-fire (LIF) neuron. We found that the discrimination capability of spike times strongly depends on high-order moments of ISI and that it is higher when the spike time sequence has a larger skewness and a smaller kurtosis. High variability in terms of coefficient of variation (CV) does not necessarily mean that the spike times have less discrimination capability. Spike sequences generated by the gamma distribution have the minimum discrimination capability for a given mean and variance of ISI. We used series expansions to calculate the mean and variance of ISIs for LIF neurons as a function of the mean input level and the input noise variance. Spike sequences from an LIF neuron are more capable of discrimination than those of IG and gamma distributions when the stationary voltage level is close to the neuron's threshold value of the neuron.
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Rusek, Fredrik, Edward K. S. Au, John B. Anderson et Wai Ho Mow. « Minimum Distance Analysis of a Certain Class of 2-D ISI Channels ». IEEE Transactions on Information Theory 58, no 2 (février 2012) : 878–87. http://dx.doi.org/10.1109/tit.2011.2169530.
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Feucht, Matthias J., Patricia M. Lutz, Conrad Ketzer, Marco C. Rupp, Matthias Cotic, Andreas B. Imhoff et Jonas Pogorzelski. « Preoperative patellofemoral anatomy affects failure rate after isolated patellofemoral inlay arthroplasty ». Archives of Orthopaedic and Trauma Surgery 140, no 12 (30 octobre 2020) : 2029–39. http://dx.doi.org/10.1007/s00402-020-03651-9.
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Abstract Purpose To analyze whether preoperative patellofemoral anatomy is associated with clinical improvement and failure rate after isolated patellofemoral arthroplasty (PFA) using a modern inlay-type trochlear implant. Methods Prospectively collected 24 months data of patients treated with isolated inlay PFA (HemiCAP® Wave, Arthrosurface, Franklin, MA, USA) between 2009 and 2016, and available digitalized preoperative imaging (plain radiographs in three planes and MRI) were retrospectively analyzed. All patients were evaluated using the WOMAC score, Lysholm score, and VAS pain. Patients revised to TKA or not achieving the minimal clinically important difference (MCID) for the total WOMAC score or VAS pain were considered failures. Preoperative imaging was analyzed regarding the following aspects: Tibiofemoral OA, patellofemoral OA, trochlear dysplasia (Dejour classification), patellar height (Insall–Salvati index [ISI]; Patellotrochlear index [PTI]), and position of the tibial tuberosity (TT–TG and TT–PCL distance). Results A total of 41 patients (61% female) with a mean age of 48 ± 13 years could be included. Fifteen patients (37%) were considered failures, with 5 patients (12%) revised to TKA and 10 patients (24%) not achieving MCID for WOMAC total or VAS pain. Failures had a significantly higher ISI, and a significantly lower PTI. Furthermore, the proportion of patients with a pathologic ISI (> 1.2), a pathologic PTI (< 0.28), and without trochlear dysplasia were significantly higher in failures. Significantly greater improvements in clinical outcome scores were observed in patients with a higher preoperative grade of patellofemoral OA, ISI ≤ 1.2, PTI ≥ 0.28, TT–PCL distance ≤ 21 mm, and a dysplastic trochlea. Conclusion Preoperative patellofemoral anatomy is significantly associated with clinical improvement and failure rate after isolated inlay PFA. Less improvement and a higher failure rate must be expected in patients with patella alta (ISI > 1.2 and PTI < 0.28), absence of trochlear dysplasia, and a lateralized position of the tibial tuberosity (TT–PCL distance > 21 mm). Concomitant procedures such as tibial tuberosity transfer may, therefore, be considered in such patients. Level of evidence Level III, retrospective analysis of prospectively collected data.
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Kreuz, Thomas, Mario Mulansky et Nebojsa Bozanic. « SPIKY : a graphical user interface for monitoring spike train synchrony ». Journal of Neurophysiology 113, no 9 (mai 2015) : 3432–45. http://dx.doi.org/10.1152/jn.00848.2014.
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Techniques for recording large-scale neuronal spiking activity are developing very fast. This leads to an increasing demand for algorithms capable of analyzing large amounts of experimental spike train data. One of the most crucial and demanding tasks is the identification of similarity patterns with a very high temporal resolution and across different spatial scales. To address this task, in recent years three time-resolved measures of spike train synchrony have been proposed, the ISI-distance, the SPIKE-distance, and event synchronization. The Matlab source codes for calculating and visualizing these measures have been made publicly available. However, due to the many different possible representations of the results the use of these codes is rather complicated and their application requires some basic knowledge of Matlab. Thus it became desirable to provide a more user-friendly and interactive interface. Here we address this need and present SPIKY, a graphical user interface that facilitates the application of time-resolved measures of spike train synchrony to both simulated and real data. SPIKY includes implementations of the ISI-distance, the SPIKE-distance, and the SPIKE-synchronization (an improved and simplified extension of event synchronization) that have been optimized with respect to computation speed and memory demand. It also comprises a spike train generator and an event detector that makes it capable of analyzing continuous data. Finally, the SPIKY package includes additional complementary programs aimed at the analysis of large numbers of datasets and the estimation of significance levels.
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Ajie, Hamidillah, et Agung Surya Bangsa. « Aplikasi Pendeteksi Dugaan Awal Plagiarisme Pada Tugas Siswa Dan Mahasiswa Berdasarkan Kemiripan Isi Teks Menggunakan Algoritma Levenshtein Distance ». PINTER : Jurnal Pendidikan Teknik Informatika dan Komputer 1, no 1 (1 juin 2017) : 23–30. http://dx.doi.org/10.21009/pinter.1.1.4.
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Tujuan dari penelitian ini adalah menerapkan algoritma Levenshtein distance pada aplikasi komputer yang dapat menghitung persentase kemiripan isi teks dokumen tugas siswa/mahasiswa sehingga dapat membantu guru/dosen dalam melakukan pendeteksian dugaan awal plagiarisme. Penelitian dilakukan di laboraturium Multimedia Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Jakarta dari bulan Agustus 2013 hingga April 2014. Metode yang digunakan adalah salah satu metode pengembangan perangkat lunak, yaitu metode Waterfall. Hasil uji coba menunjukkan bahwa setelah melalui tahapan-tahapan preprocessing, algoritma Levenshtein distance dapat diimplementasi pada aplikasi dan cocok untuk mendeteksi dugaan awal plagiarisme kata demi kata.
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Altman, Brian J., Javier Bautista, Eva Culakova, Kristina M. Morris, Rachel E. DeRollo, Elliot Outland, Amber Kleckner et al. « Abstract 3215 : BloodCCD is a novel biomarker to detect circadian rhythm disruption in cancer survivors with insomnia ». Cancer Research 82, no 12_Supplement (15 juin 2022) : 3215. http://dx.doi.org/10.1158/1538-7445.am2022-3215.
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Abstract Introduction: Insomnia is a significant co-morbidity for cancer survivors, and can independently reduce lifespan, but there is currently no objective biochemical measure of insomnia. Circadian rhythms are 24 hour cycles that control physiologic processes including sleep. Disrupted circadian rhythms have been proposed as a cause of insomnia. Here, we describe the use of a novel biomarker, BloodCCD, to assess circadian rhythms from RNA-sequencing of blood samples from two independent clinical trials and one observational study. BloodCCD was adapted from Clock Correlation Distance (CCD), which assesses normal progression of the molecular circadian clock from gene expression in tissue samples. We used BloodCCD to interrogate whether 1) cancer patients and survivors with insomnia have disrupted circadian rhythms compared to healthy good sleepers, and 2) whether the degree of circadian disruption correlates with severity of insomnia in survivors. Methods: For BloodCCD analysis, time-series RNA-sequencing of human blood from healthy subjects were used to construct a reference correlation matrix of 42 genes which oscillate with 24-hour rhythms. To assess the Aims, RNA-sequencing from patient and survivor blood samples were compared to this reference correlation matrix to generate a BloodCCD score. A higher score indicates a further distance from a healthy clock, and thus clock disruption. For the first Aim, blood RNA-sequencing from cancer patients undergoing active treatment and survivors at least 2-months post-treatment and with insomnia were compared to healthy good sleepers. For the second Aim, blood RNA-sequencing from cancer survivors with insomnia were assessed, stratified by Insomnia Severity Index (ISI) Score into mild (ISI 10-14), moderate (ISI 15-21), and severe (ISI 22-28) insomnia. Results: Patients (n=28, 100% prostate cancer) and cancer survivors (n=497, ~72% breast cancer) had higher BloodCCD scores, indicating disrupted circadian clock, compared to healthy good sleepers (n=14), with scores of 9.98, 7.99, and 4.13, respectively. When cancer survivors were stratified by insomnia severity, those with severe insomnia (ISI 22-28) had the highest BloodCCD, 9.00, while those with moderate insomnia (ISI 15-21) had a score of 8.24 and those with mild insomnia (ISI 10-14) had the lowest score of 7.93, indicating that survivors with severe insomnia had a more disrupted circadian clock. All BloodCCD values were p < 0.001 for each value compared to reference correlation. Conclusions: BloodCCD shows promise as a biomarker to biochemically detect disrupted circadian rhythms in cancer patients and survivors, and as a readout for insomnia severity. Future studies should investigate whether BloodCCD improves in cancer survivors receiving interventions for insomnia. Funding: UG1CA189961-07S1 (NCI BIQSFP Program), UG1CA189961 (URCC NCORP), T32CA102618 (URCC T32 program), K07CA221931 Citation Format: Brian J. Altman, Javier Bautista, Eva Culakova, Kristina M. Morris, Rachel E. DeRollo, Elliot Outland, Amber Kleckner, Ian R. Kleckner, Nikesha J. Gilmore, Benjamin T. Esparaz, Charles S. Kuzma, Amy C. Vander Woude, Po-Ju Lin, Jacob J. Hughey, Karen M. Mustian. BloodCCD is a novel biomarker to detect circadian rhythm disruption in cancer survivors with insomnia [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 3215.
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Fayadh, Rashid Ali, Mohd Fareq Abd Malek, Hilal Adnan Fadhil et Norshafinash Saudin. « Performance Evaluation of Adaptive Indoor Matched Rake Receiver Using Multiple-Combining Techniques ». Applied Mechanics and Materials 699 (novembre 2014) : 921–30. http://dx.doi.org/10.4028/www.scientific.net/amm.699.921.
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This paper discusses the enhancement of the wireless rake receiver for high speed and short distance indoor ultra wideband (UWB) propagation with line-of sight (LOS) and non line-of sight (NLOS) channel models. The proposed matched rake receiver uses three main combining techniques, maximum ratio combining (MRC), equal gain combining (EGC), and selective combining (SC) to capture most of the energy of the multi-path components (MPCs). When the wireless communication systems work with high capacity and high speed in transmission and reception scenarios, there will be a serious challenge defined as inter-symbol interference (ISI) during the reception process. The ISI causes increasing in the bit error rate (BER) when the wireless communication systems work with high bit rate propagation. The matched rake receiver scheme was designed to suppress ISI by maximizing the signal to noise ratio (SNR) before constructing the desired signal in decision circuit and effectively the system enhancement is improved. After adding additive white Gaussian noise (AWGN) to the received signal, the improvement is cleared comparing with the theoretical results that has no AWGN. During the comparison of the simulation results, MRC partial rake receiver of less complexity showed better performance than the EGC and SC rake receivers.
Thèses sur le sujet "ISI-distance"
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BOZANIC, NEBOJSA. « Measures of spike train synchrony ». Doctoral thesis, 2016. http://hdl.handle.net/2158/1043650.
Texte intégralRésumé :
In experimental neuroscience techniques for recording large-scale neuronal spiking activity are developing very fast. This leads to an increasing demand for algorithms capable of analyzing large amounts of spike train data. One of the most crucial and demanding tasks is the identification of similarity patterns with a very high temporal resolution and across different spatial scales. To address this task, in recent years time-resolved measures of spike train synchrony such as the ISI-distance and the SPIKE-distance have been proposed. Here we add the complementary measure SPIKE-synchronization, a sophisticated multivariate coincidence detector with a very intuitive interpretation.
In the first Results chapter we present SPIKY, an interactive graphical user interface that facilitates the application of these three time-resolved measures of spike train synchrony to both simulated and real data. SPIKY, which has been optimized with respect to computation speed and memory demand, also comprises a spike train generator and an event detector that makes it capable of analyzing continuous data. Finally, the
SPIKY package includes additional complementary programs aimed at the analysis of large numbers of datasets and the estimation of significance levels.
In the second Results chapter we deal with the very important problem of latency variations in real data. By means of a validated setup we can show that the parameter-free SPIKE-distance outperforms two time-scale dependent standard measures. In summary, in this thesis we provide several important measures and corrections that when applied to the right experimental datasets could potentially lead to an increased
understanding of the neural code - the ultimate goal of neuroscience.
Actes de conférences sur le sujet "ISI-distance"
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Dusad, S., S. N. Diggavi et A. R. Calierbank. « Rank Distance Codes for ISI channels ». Dans 2007 IEEE Information Theory Workshop on Information Theory for Wireless Networks. IEEE, 2007. http://dx.doi.org/10.1109/itwitwn.2007.4318026.
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Rusek, Fredrik, Edward K. S. Au, John B. Anderson et Wai Ho Mow. « A minimum distance analysis of a certain class of two dimensional ISI channels ». Dans 2008 IEEE International Symposium on Information Theory - ISIT. IEEE, 2008. http://dx.doi.org/10.1109/isit.2008.4594977.
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Xu, Yang, Akihiro Tagawa, Masashi Ueda, Takuya Yamashita, Yusuke Ohtsuka, Kazunori Osafune et Masahiro Nishikawa. « Characterization of SH Wave Electromagnetic Acoustic Transducer (EMAT) at Elevated Temperature ». Dans ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2834.
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The in service inspection (ISI) of MONJU fast breeder reactor vessel is performed in a severe environment at elevated temperature (about 200 °C ) and high-level radiation field (about 10Sv/h). Liquid sodium is used as the coolant of MONJU reactor. A horizontally polarized shear (SH) wave electromagnetic acoustic transducer (EMAT) is used to perform the volumetric inspection of the MONJU reactor vessel. In this paper, the magnetic flux density and the sound pressure distributions for the SH wave EMAT with a so-called Halbach magnet structure are analyzed from room temperature up to 240°C. The magnetic flux density and the sound pressure of the EMAT decrease with the increase of temperature. At 200°C, the relative reduction of the peak magnetic flux density and the relative thermal demagnetization at liftoff distance 0.5mm are less than 9% and 2%, respectively. This thermal demagnetization can be understood by analyzing the distribution of the permeance coefficient. As a result, the Halbach magnet structure can be used at elevated temperatures without large performance reductions as compared to its performance at room temperature. The Halbach EMAT will demonstrate good performance not only at room temperature but also at high temperature up to 240°C. This new structure EMAT is suitable for MONJU reactor vessel ISI.
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Yang, Christopher C., et Tobun D. Ng. « Web opinions analysis with scalable distance-based clustering ». Dans 2009 IEEE International Conference on Intelligence and Security Informatics. IEEE, 2009. http://dx.doi.org/10.1109/isi.2009.5137273.
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Cumblidge, Stephen E., Steven R. Doctor et Michael T. Anderson. « The Capabilities and Limitations of Remote Visual Methods to Detect Service-Induced Cracks in Reactor Components ». Dans ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93389.
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Since 1977, the U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research has funded a multiyear program at the Pacific Northwest National Laboratory (PNNL) to evaluate the reliability and accuracy of nondestructive evaluation (NDE) techniques employed for inservice inspection (ISI). Recently, the U.S. nuclear industry proposed replacing current volumetric and/or surface examinations of certain components in commercial nuclear power plants, as required by the ASME Boiler and Pressure Vessel Code Section XI, with a simpler visual testing (VT) method. The advantages of VT are that these tests generally involve much less radiation exposure and examination times than do volumetric examinations such as ultrasonic testing (UT). However, for industry to justify supplanting volumetric methods with VT, an analysis of pertinent issues is needed to support the reliability of VT in determining the structural integrity of reactor components. As piping and pressure vessel components in a nuclear power station are generally underwater and in high radiation fields, they need to be examined by VT from a distance with radiation-hardened video systems. Remote visual testing has been used by nuclear utilities to find cracks in pressure vessel cladding in pressurized water reactors, core shrouds in boiling water reactors, and to investigate leaks in piping and reactor components. These visual tests are performed using a wide variety of procedures and equipment. The techniques for remote visual testing use submersible closed-circuit video cameras to examine reactor components and welds. PNNL has conducted a parametric study that examines the important variables that affect the effectiveness of a remote visual test. Tested variables include lighting techniques, camera resolution, camera movement, and magnification. PNNL has also conducted a laboratory test using a commercial visual testing camera system to experimentally determine the ability of the camera system to detect cracks of various widths under ideal conditions.
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Siegele, Dieter, Igor Varfolomeyev et Gerhard Nagel. « Inherent Margin in the Brittle Failure Assessment for RPV ». Dans ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61507.
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The brittle fracture assessment of the reactor pressure vessels (RPV) of the EON Kernkraft (EKK) pressurized water reactors has been updated to the state of the art. The reference temperatures of the RPV for the design fluence of 5E18 n/cm2 are at or below 0°C. The weld joint between vessel flange and cylinder as well as the hot and the cold leg nozzle corners proved to be the prominent and covering situations for the RPV. The fracture mechanics results for these configurations for operational and loss of coolant transients (LOCA) were produced rerunning the assessment procedure established for the licensing of the RPV and additionally with the application of state of the art procedure. Big margin inherent to the older procedure was disclosed with the more realistic but still conservative input. Most of the margin resulted from the application of the fracture toughness based reference temperature RTTo in place of RTNDT, from the constraint representative fracture toughness applied in the nozzle corner situation and from taking into account the results of the non destructive evaluation (NDE) during the manufacture and the in-service inspection (ISI) with defect postulates of allowable size. The results show the load paths with large distance to the fracture toughness curve, in the upper shelf temperature region of fracture toughness and/or with negligible values far below the lower shelf, both demonstrating an excessive inherent safety of the older procedure. In addition, for the LOCA, a multi barrier concept is applied. Besides the flawless state of the vessel and the preclusion of initiation from postulated flaws, with the arrest of postulated crack initiation and break preclusion for crack extension from postulated rising load after crack arrest two additional barriers against failure were proven. For all load cases the relevant load path temperatures proved to be in the upper shelf regime of fracture toughness, where ductile fracture is the failure mechanism and brittle fracture is precluded.