34,963 results
Search Results
2. 'Noisy' issues in road acoustics: A white paper
- Author
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Filippo Giammaria Praticò
- Subjects
Aggregate gradation ,Complex design ,Noise ,Surface texture ,Tyre/road interaction ,Highway engineering. Roads and pavements ,TE1-450 ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Despite almost a century of studies dealing with traffic noise, researchers and practitioners still face old and new issues when designing a low-noise pavement. Given that, this manuscript aims at focusing on a number of unsolved questions, namely theoretical or technological. 1) Is it viable to balance diverse road-related needs (i.e., noise, expected life, texture levels, and friction)? 2) How much does the pavement material affect its acoustic performance (the remaining factors being constant)? 3) How much reliable is the relationship between road texture and mixture aggregate gradation? Based on the analysis of these issues, it emerges that: 1) optimal pavement design involves complex mix optimization and there are theoretical and practical bases to set up a balanced approach to address the complexity of pavement design; 2) high percentages of crumb rubber could optimise road acoustic response but this latter has a relationship with the tyre/road noise (expressed, for example, in terms of close proximity index) that calls for further investigation; 3) aggregate gradation appears to be a reliable basis to predict surface texture and therefore, under given boundary conditions, tyre/road noise; and 4) further studies and investigations are needed in terms of local calibration of deterioration curves and setting up of a sound method to assess the frequency response of asphalt concretes and to govern on-site noise indicators based on mixture properties.
- Published
- 2022
- Full Text
- View/download PDF
3. Applications of Xylan Derivatives to Improve the Functional Properties of Cellulose Foams for Noise Insulation.
- Author
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Nastac, Silviu Marian, Nechita, Petronela, Guiman, Maria Violeta, Roman, Mirela, and Rosca, Ioan Calin
- Subjects
XYLANS ,FOAM ,CELLULOSE ,SURFACE preparation ,MANUFACTURING processes ,NOISE ,PAPER industry - Abstract
Cellulose-based foams present a high potential for noise insulation applications. These materials are bio-degradable, eco-friendly by both embedded components and manufacturing process, have low density and high porosity, and are able to provide good noise insulation characteristics compared with available petroleum-based foams currently used on a large scale. This paper presents the results of some investigations performed by the authors in order to improve the functional characteristics in terms of free surface wettability and structural integrity. Native xylan and xylan-based derivatives (in terms of acetylated and hydrophobized xylan) were taken into account for surface treatment of cellulose foams, suggesting that hemicelluloses represent by-products of pulp and paper industry, and xylan polysaccharides are the most abundant hemicelluloses type. The investigations were mainly conducted in order to evaluate the level to which surface treatments have affected the noise insulation properties of basic cellulose foams. The results indicate that surface treatments with xylan derivatives have slowly affected the soundproofing characteristics of foams, but these clearly have to be taken into account because of their high decrease in wettability level and improving structural integrity. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
4. TBNF:A Transformer-based Noise Filtering Method for Chinese Long-form Text Matching.
- Author
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Gan, Ling, Hu, Liuhui, Tan, Xiaodong, and Du, Xinrui
- Subjects
TRANSFORMER models ,NOISE ,FILTER paper ,KALMAN filtering - Abstract
In the field of deep matching, a large amount of noisy data in Chinese long texts affects the matching effect. Most long-form text matching models use all text data indiscriminately, which results in a large amount of noisy data, and thus the PageRank algorithm is combined with Transformer to filter noise. For sentence-level noise detection, after calculating the overlap rate of words to evaluate the similarity, a sentence-level relationship graph is constructed and filtered by using the PageRank algorithm; for word-level noise detection, based on the attention score in Transformer, a word graph is established, then the PageRank algorithm is executed on graph, combined with self-attention weights, to select keywords to highlight topic relevance, the noisy words are filtered sequentially at different layers in the module, layer by layer. In addition, during the model training, PolyLoss is applied to replace the traditional binary Cross-Entropy loss function, thus reducing the difficulty of hyperparameter tuning. Finally, a better filtering strategy is proposed and experiments are conducted to verify it on two Chinese long-form text matching datasets. The result shows that the matching model based on the noise filtering strategy of this paper can better filter the noise and capture the matching signal more accurately. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
5. Mitigating the bullwhip effect through supply chain ESG transparency: roles of digitalization and signal strength
- Author
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Wu, Lin, Wang, Miao, Kumar, Ajay, and Choi, Tsan-Ming
- Published
- 2024
- Full Text
- View/download PDF
6. Reply to criticisms by V.E. Callaway of papers MM1 and MM11 at the 86th meeting of the ASA.
- Author
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Lane SR
- Subjects
- Humans, Aircraft, Hearing Loss, Noise-Induced prevention & control, Noise
- Published
- 1974
- Full Text
- View/download PDF
7. References to contemporary papers on acoustics.
- Author
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White FE and Teas DC
- Subjects
- Humans, Acoustics, Bibliographies as Topic, Hearing physiology, Noise
- Abstract
In most of the following references, the author's name is followed by the title of the paper or book in boldface, the journal, the volume number in boldface, the issue number in parentheses, the page reference, and lastly, in parentheses, the year. Where reference is made to abstract journals that number their abstracts, the abstract number is given instead of a page reference. Abstracts in Annales des Tèlècommunications are in French and those for Referativnyi Zhurnal, Fizika (three series, E, I, Zh) are in Russian [where, e.g., Ref. Zh. Fiz. 7 E425 (1979) means: July issue, E, abstract no. 425, year 1979.] When possible, the abbreviations for the names of the journals follow those in Bibliographic Guide for Editors & Authors (1974). A number preceded by the letters AD, DE, PB, or N refers to the accession/report number of the Government Reports Announcements & Index. The numbers to the left of the sections and sub-sections in this volume correspond to those that appear in the Classification of Subjects preceding the index in the June 1983 issue of JASA. Compiled from various sources. For many of the journals referred to here, those interested will find their addresses in either the semi-annual Author Index of Physics Abstracts or the annual Physics Briefs: List of Abstracted Periodical and Serial Publications.
- Published
- 1983
8. Rebuttal to papers on aircraft noise by S.R. Lane at the 86th Meeting of the ASA.
- Author
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Callaway VE
- Subjects
- Humans, Aircraft, Hearing Loss, Noise-Induced prevention & control, Noise
- Published
- 1974
- Full Text
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9. Technical aspects of Dr. Kryter's paper "Impairment to hearing from exposure to noise" with respect to the NIOSH statistics.
- Author
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Lempert BL
- Subjects
- Adolescent, Adult, Deafness epidemiology, Environmental Exposure, Humans, Male, Middle Aged, National Institutes of Health (U.S.), United States, Deafness diagnosis, Disability Evaluation, Hearing Loss, Noise-Induced diagnosis, Noise prevention & control
- Published
- 1973
- Full Text
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10. Some general reactions to Kryter's paper "Impairment to hearing from exposure to noise".
- Author
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Cohen A
- Subjects
- Environmental Exposure, Humans, Deafness diagnosis, Disability Evaluation, Hearing Loss, Noise-Induced diagnosis, Noise prevention & control
- Published
- 1973
- Full Text
- View/download PDF
11. Reply to the critiques of A. Cohen, H. Davis, B.L. Lempert, and W.D. Ward of the paper "Impairment to hearing from exposure to noise".
- Author
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Kryter KD
- Subjects
- Adolescent, Adult, Environmental Exposure, Humans, Male, Middle Aged, Deafness diagnosis, Disability Evaluation, Hearing Loss, Noise-Induced diagnosis, Noise prevention & control
- Published
- 1973
- Full Text
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12. [Invited Paper] Investigation of Noise Characteristics of Multivalued Signals and Estimation of Single-page Storage Density in Holographic Data Storage
- Author
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Ryushi Fujimura
- Subjects
Noise ,Computer science ,Signal Processing ,Media Technology ,Electronic engineering ,Holographic data storage ,Computer Graphics and Computer-Aided Design - Published
- 2021
13. [Paper] Noise Bias Compensation for Color Images after Tone Mapping
- Author
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Ryosuke Harakawa, Sayaka Minewaki, Yo Umeki, and Masahiro Iwahashi
- Subjects
Noise ,business.industry ,Computer science ,Noise reduction ,Signal Processing ,Bayesian probability ,Media Technology ,Computer vision ,Artificial intelligence ,Tone mapping ,business ,Computer Graphics and Computer-Aided Design ,Compensation (engineering) - Published
- 2021
14. Authors’ response (July 6, 2018) to the letter to the Editor concerning the paper 'Impact of road traffic noise on sleep disturbances and attention disorders amongst school children living in Upper Silesian Industrial Zone, Poland'
- Author
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Michał Skrzypek, Małgorzata Kowalska, Elżbieta M. Czech, Ewa Niewiadomska, and Jan E. Zejda
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sleep ,child ,noise ,attention ,transportation ,automobiles ,Medicine - Published
- 2018
- Full Text
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15. Comparison of Multiple Measures of Noise Exposure in Paper Mills
- Author
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Marianne Andersson, Richard L. Neitzel, and Eva Andersson
- Subjects
Paper ,Sweden ,Validity coefficient ,Job-exposure matrix ,Public Health, Environmental and Occupational Health ,General Medicine ,030210 environmental & occupational health ,Article ,Occupational safety and health ,Background noise ,03 medical and health sciences ,Noise ,0302 clinical medicine ,Noise exposure ,Occupational Exposure ,Manufacturing Industry ,Statistics ,Noise, Occupational ,Forensic engineering ,Humans ,Environmental science ,Dosimetry ,030223 otorhinolaryngology ,Environmental Monitoring ,Exposure assessment - Abstract
BACKGROUND Noise exposures are associated with a host of adverse health effects, yet these exposures remain inadequately characterized in many industrial operations, including paper mills. We assessed noise at four paper mills using three measures: (i) personal noise dosimetry, (ii) area noise measurements, and (iii) questionnaire items addressing several different aspects of perceived noise exposure. METHODS We assessed exposures to noise characterized using the three measures and compared the relationships between them. We also estimated the validity of each of the three measures using a novel application of the Method of Triads, which does not appear to have been used previously in the occupational health literature. RESULTS We collected 209 valid dosimetry measurements and collected perceived noise exposure survey items from 170 workers, along with 100 area measurements. We identified exposures in excess of 85 dBA at all mills. The dosimetry and area noise measurements assigned to individual subjects generally showed good agreement, but for some operations within mill, large differences between the two measures were observed, and a substantial fraction of paired measures differed by >5 dB. Perceived noise exposures varied greatly between the mills, particularly for an item related to difficulty speaking in noise. One perceived noise exposure item related to difficulty hearing due to noise showed strong and significant correlations with both dosimetry and area measurements. The Method of Triads analysis showed that dosimetry measures had the highest estimated validity coefficient (0.70), and that the best performing perceived exposure measure had validity that exceeded that of area measurements (0.48 versus 0.40, respectively). CONCLUSIONS Workers in Swedish pulp mills have the potential for exposures to high levels of noise. Our results suggest that, while dosimetry remains the preferred approach to exposure assessment, perceived noise exposures can be used to evaluate potential exposures to noise in epidemiological studies.
- Published
- 2016
16. Production Of Noise İsolation Materials By Using Waste Papers
- Author
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TURAL, Salih Sancar, ŞAHİNKAYA, Serkan, and Nevşehir Hacı Bektaş Veli Üniversitesi/Mühendislik-Mimarlık Fakültesi/Çevre Mühendisliği Bölümü/Su Kirliliği Ve Atıksu Kontrol Teknolojisi Anabilim Dalı
- Subjects
Gürültü ,Sound ,Atıp kağıt ,İzolasyon ,Panel ,Ses ,Waste paper ,Noise ,isolation - Abstract
Bu çalışmada, gürültünün insan sağlığı üzerinde oluşturduğu olumsuz etkilerin en aza indirilmesi amacıyla halen kullanılan gürültü izolasyon malzemelerine alternatif olabilecek yeni bir izolasyon malzemesinin oluşturulması amaçlanmıştır. Çalışma gerçekleştirilirken, gündelik yaşantımızda yoğun kullanımlar sonucu oluşan atık niteliği kazanmış kağıtların çevre ve insan sağlığına zararının en aza indirilmesi ve ekonomiye katkı sağlaması esasları dikkate alınmıştır. Bu amaçla, strafor (EPS), atık kâğıt ve pomza taşı tozu kullanılarak altı farklı modifikasyonda izolasyon panelleri üretilmiştir. Üretilen bu panellerde ses geçiş kaybı analizleri 100 – 2.000 Hz frekans aralığında gerçekleştirilmiştir. Sonuç olarak üretilen panel ile 1.000 Hz. frekansta 15,8 desibel gürültü azaltımı sağlanmıştır. Böylece ülkemizde yılda 2 milyon tondan fazla çıkan ancak sadece %50'sini geri dönüştürebildiğimiz atık kâğıdın, izolasyon panelleri için ham madde olarak kullanılabilir olduğu belirlenmiştir. In this study, it was aimed to produce a new isolation material which could be an alternative to the currently used noise isolation materials in order to minimize the negative effects of noise on human health. For this purpose, six different modified insulation panels were produced using styrofoam (EPS), waste paper and pumice powder. In these panels produced, the sound transmission loss analyses were carried out at a frequency range of 100 – 2.000 Hz. As a result, it was determined that the material has the isolation ability up to 15,8 decibels at 1.000 Hz frequency. Thus, it is understood that the waste paper which can be recycked by only 50% of our country, which is more than 2 million tons per year, can be used as raw material for the insulation panels.
- Published
- 2018
17. Investigation of the Helmholtz Green Resonator Panel from Rice Husk Waste and Office Paper Reinforced with Coconut Coir Skin as a Noise Absorbing Panel
- Author
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Prabang Setyono, Kuncoro Diharjo, I Made Miasa, and Hari Setyanto R
- Subjects
Resonator ,symbols.namesake ,Noise ,Materials science ,Helmholtz free energy ,Acoustics ,symbols ,Coir ,Husk - Published
- 2020
18. The Potency of Waste Paper 'Egg Tray' as a Noise-Reduction Material
- Author
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Ihsan Nasrullah and Ernaning Setiyowati
- Subjects
Engineering ,Waste management ,business.industry ,Acoustics ,Noise reduction ,Waste paper ,General Medicine ,Noise ,Resonator ,Tray ,Sound level meter ,Porous medium ,Porosity ,business - Abstract
Noise is one of the problems that often occur in urban areas due to the traffic condition. Noise in a building design depends on the choice of materials as sound absorbers. The type of sound dampening material that already exists is a porous material, a resonator, and a panel. The material often used as an absorber is porous materials, because it is relatively cheaper and lighter, especially to reduce the noise in the narrow spaces such as housing and offices. Various substitutes are made from cheap materials, such as the use of recycled materials of egg tray paper with the size of 40 x 40 centimeters. This is a quantitative research that will measure the place of egg tray paper in reducing noise, using a Sound Level Meter. The use of the egg tray paper is able to show an adequate acoustic quality as noise absorbers, with the average value of NR 22-26 dB.
- Published
- 2015
19. Joint monitoring programme of ambient noise North Sea (Jomopans): Opinion paper on continuous noise pollution.
- Author
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Kinneging, Niels
- Subjects
- *
NOISE pollution , *UNDERWATER noise , *NOISE , *MARINE animals , *WIND power plants , *PETROLEUM industry - Abstract
Sound is omnipresent in the underwater environment and can be produced by natural (waves, weather, animals) and man-made (shipping, wind farms, oil and gas activities) sources. For marine animals, such as whales, fish and even invertebrates, the auditory senses are very important. To evaluate the soundscape and to manage the marine environment with respect to underwater noise monitoring is very important. For management the impact of noise some options are available. These options need further consideration to be implemented effectively. • This paper describes results of the JOMOPANS project and discusses possible actions to manage the impact of underwater noise. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
20. Towards a Unified Testing Framework for Single-Sided Deafness Studies: A Consensus Paper
- Author
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Tobias Weissgerber, Mohan Kameswaran, Paul Van de Heyning, Susan Arndt, Erwin L. J. George, Daniel Polterauer, Rudolf Hagen, John Martin Hempel, Joachim Müller, Dayse Távora-Vieira, Hideaki Moteki, Astrid Wolf-Magele, Griet Mertens, Vincent Van Rompaey, Anja Kurz, Ryosuke Kitoh, Maiko Miyagawa, Ranjith Rajeswaran, Ruben Polo, Shin ichi Usami, Mario E. Zernotti, Gunesh P. Rajan, Kari Smilsky, Maria Fernanda Di Gregorio, Georg Mathias Sprinzl, Thomas Wesarg, Wolf Dieter Baumgartner, Robert J. Stokroos, Stefan Zirn, Ohad Hilly, Daniel Leander, María del Mar Medina, Uwe Baumann, Tobias Rader, David Ulanovski, Yael Henkin, Thomas Keintzel, Kristen Rak, Mathieu Marx, Centre de recherche cerveau et cognition (CERCO), Institut des sciences du cerveau de Toulouse. (ISCT), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Otolaryngology and Head and Neck Surgery Department, Hospital Universitario Ramón y Cajal, Madrid, Spain., RS: MHeNs - R1 - Cognitive Neuropsychiatry and Clinical Neuroscience, KNO, MUMC+: MA AIOS Keel Neus Oorheelkunde (9), MUMC+: MA Keel Neus Oorheelkunde (9), and MUMC+: MA Audiologisch Centrum Maastricht (9)
- Subjects
medicine.medical_specialty ,Consensus ,Physiology ,Computer science ,Speech recognition ,medicine.medical_treatment ,Treatment outcome ,Audiology ,Deafness ,Hearing Loss, Unilateral ,03 medical and health sciences ,Speech and Hearing ,Tinnitus ,0302 clinical medicine ,Bone conduction ,Hearing Aids ,Cochlear implant ,Surveys and Questionnaires ,medicine ,Journal Article ,Humans ,Comparative Study ,Longitudinal Studies ,Prospective Studies ,Sound Localization ,030223 otorhinolaryngology ,Cochlear implantation ,Hearing Loss ,ComputingMilieux_MISCELLANEOUS ,Original Paper ,[SCCO.NEUR]Cognitive science/Neuroscience ,Bone-anchored hearing aid ,Unilateral ,medicine.disease ,Cochlear Implantation ,Sensory Systems ,Cochlear Implants ,Treatment Outcome ,Otorhinolaryngology ,Randomized Controlled Trial ,Quality of Life ,Speech Perception ,Human medicine ,medicine.symptom ,Routing (electronic design automation) ,Unilateral hearing loss ,Noise ,030217 neurology & neurosurgery - Abstract
Background: While hearing aids for a contralateral routing of signals (CROS-HA) and bone conduction devices have been the traditional treatment for single-sided deafness (SSD) and asymmetric hearing loss (AHL), in recent years, cochlear implants (CIs) have increasingly become a viable treatment choice, particularly in countries where regulatory approval and reimbursement schemes are in place. Part of the reason for this shift is that the CI is the only device capable of restoring bilateral input to the auditory system and hence of possibly reinstating binaural hearing. Although several studies have independently shown that the CI is a safe and effective treatment for SSD and AHL, clinical outcome measures in those studies and across CI centers vary greatly. Only with a consistent use of defined and agreed-upon outcome measures across centers can high-level evidence be generated to assess the safety and efficacy of CIs and alternative treatments in recipients with SSD and AHL. Methods: This paper presents a comparative study design and minimum outcome measures for the assessment of current treatment options in patients with SSD/AHL. The protocol was developed, discussed, and eventually agreed upon by expert panels that convened at the 2015 APSCI conference in Beijing, China, and at the CI 2016 conference in Toronto, Canada. Results: A longitudinal study design comparing CROS-HA, BCD, and CI treatments is proposed. The recommended outcome measures include (1) speech in noise testing, using the same set of 3 spatial configurations to compare binaural benefits such as summation, squelch, and head shadow across devices; (2) localization testing, using stimuli that rove in both level and spectral content; (3) questionnaires to collect quality of life measures and the frequency of device use; and (4) questionnaires for assessing the impact of tinnitus before and after treatment, if applicable. Conclusion: A protocol for the assessment of treatment options and outcomes in recipients with SSD and AHL is presented. The proposed set of minimum outcome measures aims at harmonizing assessment methods across centers and thus at generating a growing body of high-level evidence for those treatment options.
- Published
- 2017
21. Republished Paper. Multiple damage detection and localization in beam-like and complex structures using co-ordinate modal assurance criterion combined with firefly and genetic algorithms
- Author
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MagdĀ AbdelĀ Wahab, SamirĀ Khatir, AbdelwahhabĀ Khatir, and MohamedĀ Tehami
- Subjects
Engineering ,coordinate modal assurance criterion ,lcsh:Mechanical engineering and machinery ,02 engineering and technology ,finite element analysis ,01 natural sciences ,0203 mechanical engineering ,Simple (abstract algebra) ,0103 physical sciences ,Genetic algorithm ,genetic algorithm ,General Materials Science ,Firefly algorithm ,lcsh:TJ1-1570 ,010301 acoustics ,business.industry ,Mechanical Engineering ,Frame (networking) ,firefly algorithm ,Finite element method ,Noise ,020303 mechanical engineering & transports ,Modal ,Rate of convergence ,business ,Algorithm ,damage detection and localization ,two-dimensional frame structure ,optimization - Abstract
Damage detection and localization in civil engineering constructions using dynamic analysis has become an important topic in recent years. This paper presents a methodology based on non-destructive detection, localization and quantification of multiple damages in simple and continuous beams, and a more complex structure, namely two-dimensional frame structure. The proposed methodology makes used of Firefly Algorithm and Genetic Algorithm as optimization tools and the Coordinate Modal Assurance Criterion as an objective function. The results show that the proposed combination of Coordinate Modal Assurance Criterion and Firefly Algorithm or Genetic Algorithm can be easily used to identify multiple local structural damages in complex structures. However, the convergence rate becomes slower for the case of multiple damages compared to the case of single damage. The effect of noise on the algorithm is further investigated. It is found that the proposed technique is able to detect the damage location and its severity with high accuracy in the presence of noise, although the convergence rate became slower than in the case when no noise is present. It is also found that the convergence rate of Firefly Algorithm is much faster than that of Genetic Algorithm.
- Published
- 2018
22. Interactive procedural simulation of paper tearing with sound
- Author
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Pierre-Luc Manteaux, Marie-Paule Cani, Thibault Lejemble, Camille Schreck, Thibault Blanc-Beyne, Amélie Fondevilla, Paul G. Kry, Nicolas Durin, École nationale supérieure d'informatique et de mathématiques appliquées (ENSIMAG), Université Joseph Fourier - Grenoble 1 (UJF), Intuitive Modeling and Animation for Interactive Graphics & Narrative Environments (IMAGINE), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Laboratoire Jean Kuntzmann (LJK), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), McGill University = Université McGill [Montréal, Canada], European Project: 291184,EC:FP7:ERC,ERC-2011-ADG_20110209,EXPRESSIVE(2012), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jean Kuntzmann (LJK), and Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Computer science ,Acoustics ,real-time ,02 engineering and technology ,Thumb ,Deformation (meteorology) ,01 natural sciences ,Motion (physics) ,sound ,Position (vector) ,ACM: I.: Computing Methodologies/I.3: COMPUTER GRAPHICS/I.3.7: Three-Dimensional Graphics and Realism ,0103 physical sciences ,Tearing ,0202 electrical engineering, electronic engineering, information engineering ,medicine ,010306 general physics ,tearing ,Simulation ,Orientation (computer vision) ,paper ,020207 software engineering ,[INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation ,eye diseases ,[INFO.INFO-GR]Computer Science [cs]/Graphics [cs.GR] ,Noise ,medicine.anatomical_structure ,sense organs - Abstract
International audience; We present a phenomenological model for the real-time simulation of paper tearing and sound. The model uses as input rotations of the hand along with the index and thumb of left and right hands to drive the position and orientation of two regions of a sheet of paper. The motion of the hands produces a cone shaped deformation of the paper and guides the formation and growth of the tear. We create a model for the direction of the tear based on empirical observation, and add detail to the tear with a directed noise model. Furthermore, we present a procedural sound synthesis method to produce tearing sounds during interaction. We show a variety of paper tearing examples and discuss applications and limitations.
- Published
- 2015
23. [Papers] Impacts of Random Telegraph Noise with Various Time Constants and Number of States in Temporal Noise of CMOS Image Sensors
- Author
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Rihito Kuroda, Akinobu Teramoto, and Shigetoshi Sugawa
- Subjects
010302 applied physics ,Computer science ,020208 electrical & electronic engineering ,Time constant ,Temporal noise ,02 engineering and technology ,01 natural sciences ,Computer Graphics and Computer-Aided Design ,Noise ,CMOS ,0103 physical sciences ,Signal Processing ,0202 electrical engineering, electronic engineering, information engineering ,Media Technology ,Electronic engineering ,Image sensor - Published
- 2018
24. [Papers] Statistical Analyses of Random Telegraph Noise in Pixel Source Follower with Various Gate Shapes in CMOS Image Sensor
- Author
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Shinya Ichino, Shunichi Wakashima, Shigetoshi Sugawa, Takezo Mawaki, Tomoyuki Suwa, Rihito Kuroda, and Akinobu Teramoto
- Subjects
010302 applied physics ,Pixel ,Computer science ,Acoustics ,020208 electrical & electronic engineering ,02 engineering and technology ,01 natural sciences ,Computer Graphics and Computer-Aided Design ,Noise ,Statistical analyses ,Shallow trench isolation ,0103 physical sciences ,Signal Processing ,0202 electrical engineering, electronic engineering, information engineering ,Media Technology ,Image sensor - Published
- 2018
25. Low illumination fog noise image denoising method based on ACE-GPM.
- Author
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Li, Wuyi, Zhou, Guanglu, and Wang, Xingjian
- Subjects
IMAGE denoising ,NOISE ,ENTROPY (Information theory) ,LIGHTING - Abstract
The Perona-Malik (P-M) model exhibits deficiencies such as noise amplification, new noise introduction, and significant gradient effects when processing noisy images. To address these issues, this paper proposes an image-denoising algorithm, ACE-GPM, which integrates an Automatic Color Equalization (ACE) algorithm with a gradient-adjusted P-M model. Initially, the ACE algorithm is employed to enhance the contrast of low-light images obscured by fog and noise. Subsequently, the Otsu method, a technique to find the optimal threshold based on between-class variance, is applied for precise segmentation, enabling more accurate identification of different regions within the image. After that, distinct gradients enhance the image's foreground and background via an enhancement function that accentuates edge and detailed information. The denoising process is finalized by applying the gradient P-M model, employing a gradient descent approach to further emphasize image edges and details. Experimental evidence indicates that the proposed ACE-GPM algorithm not only elevates image contrast and eliminates noise more effectively than other denoising methods but also preserves image details and texture information, evidenced by an average increase of 0.42 in the information entropy value. Moreover, the proposed solution achieves these outcomes with reduced computational resource expenditures while maintaining high image quality. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
26. Chérie Rivers Ndaliko. Necessary Noise: Music, Film, and Charitable Imperialism in the East of Congo. New York: Oxford University Press, 2016. xiv + 285 pp. Photographs. Bibliography. Index. $30.95. Paper. ISBN: 9780190499587
- Author
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Ch. Didier Gondola
- Subjects
Cultural Studies ,Noise ,Index (economics) ,History ,Anthropology ,Bibliography ,Art history - Published
- 2018
27. [Regular Paper] Stochastic Non-minimal State Space Control with Application to Automated Drug Delivery
- Author
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C. James Taylor, Quentin Clairon, and Emma Wilson
- Subjects
Stochastic control ,0209 industrial biotechnology ,State variable ,Computer science ,0211 other engineering and technologies ,State vector ,02 engineering and technology ,Kalman filter ,Noise ,020901 industrial engineering & automation ,Control theory ,Control system ,021105 building & construction ,State space - Abstract
This paper shows how a standard proportional-integral-plus controller, based on a non-minimal state space (NMSS) design, can be extended to reduce the effects of measurement noise and so yield smoother control inputs for automated drug delivery control applications. Use of a NMSS model for state variable feedback control design, in which all the states are based on the directly measured input and output variables, removes the need for state estimation. Nonetheless, a stochastic NMSS form, with a Kalman filter, can optionally be introduced to reduce the effect of measurement noise and so yield smoother control inputs. In this case, the Kalman filter attenuates measurement noise but does not address state disturbances. In this article, we propose a modification to the stochastic NMSS control system to enable the elimination of such state disturbances. This involves further extending the non–minimal state vector to include additional terms based on the innovations. We compare the deterministic, stochastic and extended stochastic NMSS controllers via a simulation of the control of anaesthesia using propofol.
- Published
- 2018
28. Communication Reducing Diffusion LMS Robust to Impulsive Noise Using Smart Selection of Communication Nodes.
- Author
-
Zayyani, Hadi
- Subjects
BURST noise ,CARRIER transmission on electric lines ,NOISE ,ELECTRONIC paper ,TELECOMMUNICATION systems ,LEAST squares - Abstract
The paper proposes a smart method to remove network nodes that are highly prone to impulse noise and replacing them with a linear combination of existing more reliable nodes. This is done to reduce communication cost. To reduce the communication cost in a network, a common way is to remove some nodes randomly and then replace the intermediate estimation of these nodes by the corresponding node estimation. In this direction, the contribution of this paper is twofold. First, we suggest to remove the nodes smartly by omitting the unreliable nodes prone to impulsive noise. This is done by computing the disturbance induced in the adaptation step of the diffusion least mean square. Second, we replace the estimation of removing nodes by a linear combination of existing estimations of reliable nodes instead of just replacing by the estimation of the corresponding node. Also, the coefficients of linear combination are optimized based on the minimum disturbance principle. Furthermore, the minimum achievable disturbance is calculated mathematically and a necessary and sufficient condition for stability of the proposed algorithm is presented. Finally, the simulation results show the efficiency of the proposed method in comparison with some state-of-the-art algorithms. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
29. Cooperative object detection in road traffic 1 1The research for this paper was financially supported by the Hollósi Ferenc Tudástámogató Alapítvány
- Author
-
Olivér Törő, Tamás Bécsi, Szilárd Aradi, and Péter Gáspár
- Subjects
020301 aerospace & aeronautics ,business.industry ,Gaussian ,Recursion (computer science) ,020206 networking & telecommunications ,02 engineering and technology ,Object detection ,Nonlinear system ,Noise ,symbols.namesake ,0203 mechanical engineering ,Control and Systems Engineering ,0202 electrical engineering, electronic engineering, information engineering ,symbols ,State space ,Computer vision ,Artificial intelligence ,Affine transformation ,business ,Particle filter ,Mathematics - Abstract
Multi-sensor object detection and tracking on a highway scene with radar measurements is presented. The estimation algorithm is the random finite set based Bernoulli filter, working in the Bayesian framework. The recursion for calculating the Bayes estimation is implemented as a particle filter. A method is presented for calculating the likelihoods, suitable for particle filtering performed with moving sensors, assuming additive Gaussian measurement noise. In our approach, for calculating the posterior estimate of the object state, the measurement likelihoods are computed in the state space, instead of the measurement space, by mapping each measurement to the global coordinate system. The map consists of a nonlinear and an affine part. While the affine transformation trivially preserves the Gaussian nature, the nonlinear is well-proven to be approximated as affine too. This approach allows the particles to be drawn directly from the state space, hence the evaluation of the measurement model is not needed, which saves computational power.
- Published
- 2017
30. Understanding and Reducing Performance Variation in New Product Development Using Paper Helicopter Experiment
- Author
-
Si-Ung Kim, Yong-Seog Nam, Jai-Hyun Byun, Byung-Cheol Shin, and Sun Min Jeong
- Subjects
Measurement systems analysis ,Engineering ,business.industry ,media_common.quotation_subject ,System of measurement ,Process design ,Repeatability ,Reliability engineering ,Noise ,New product development ,Quality (business) ,Product (category theory) ,business ,Simulation ,media_common - Abstract
Purpose: In developing new products, reducing performance variation is important for competitiveness factors such as quality, cost, and delivery. This paper aims at evaluating three performance variations; measurement, performance evaluation, and manufacturing variations, and then improving product and process design, focused on paper helicopter making case study. Methods: For measurement system analysis, gage R&R (repeatability and reproducibility), linearity, stability are evaluated. Since gage R&R are not satisfactory, the measurement system is improved by adopting voice memos application of iPhone and providing standard measurement procedure. To evaluate performance varia- tion, product deterioration and environment factor (wind speed) is considered. Since the existing design is sensitive to these noise factors, a new product design is developed, which is proven to be robust to the noise factors. Finally, manufacturing variations are evaluated with five factors which can cause variation in flight time. To reduce the impact of three significant factors, three improvement methods are applied. Results: Three performance variations are evaluated and robust paper helicopter design is presented. Conclusion: To reduce measurement and process variations, improved measurement method and paper heli- copter making procedure are proposed. A new product design is also presented which is robust to deterioration
- Published
- 2015
31. Dual Control and Information Gain in Controlling Uncertain Processes**This paper was not presented at any IFAC meeting. Corresponding author H. C. La. This work was supported by the German Research Foundation (DFG) within the Heidelberg Graduate School for Mathematical and Computational Methods for the Sciences. Support by the EU through S. Engell’s and H.G. Bock’s ERC Advanced Investigator Grant MOBOCON (291 458) is gratefully acknowledged
- Author
-
Hans Georg Bock, Andreas Potschka, Johannes P. Schlöder, and Huu Chuong La
- Subjects
Estimation ,0209 industrial biotechnology ,Engineering ,business.industry ,media_common.quotation_subject ,Control (management) ,Control engineering ,02 engineering and technology ,Task (project management) ,Dual (category theory) ,Model predictive control ,Noise ,020901 industrial engineering & automation ,020401 chemical engineering ,Control and Systems Engineering ,Control theory ,Order (exchange) ,Quality (business) ,0204 chemical engineering ,business ,media_common - Abstract
In controlling uncertain processes, it is decisive to utilize information provided by measurements in order to estimate parameters and states. Nonlinear Model Predictive Control (NMPC) is a popular method to implement feedback control and deal with uncertainties. Conventional NMPC or nominal control, however, sometimes does not provide enough information for system estimation, leading to unsatisfactory performance. Dual control attempts to strike a balance between the two goals of enhancing system estimation and optimizing the nominal objective function. In this paper, we analyze the performance of these strategies through the interplay between the performance control task and the information gain task in connection with Optimal Experimental Design. Examples illustrate the conflict and agreement between the two tasks and explain why in some cases nominal control performs well. It is also observed that measurement noise provides excitation helping to improve the quality of estimates.
- Published
- 2016
32. Investigation All Types of Aircraft Noises: Review Paper
- Author
-
Mojtaba Sadeghian and Mofid Gorji-Bandpy
- Subjects
Aircraft noise ,Computer science ,Aviation ,business.industry ,Scale (chemistry) ,Noise reduction ,General Engineering ,ComputerApplications_COMPUTERSINOTHERSYSTEMS ,Jet noise ,Takeoff and landing ,Noise ,Aeronautics ,Aeroacoustics ,General Earth and Planetary Sciences ,business ,General Environmental Science - Abstract
This article presents a review of current aircraft noises. Noise is a fascinating area of research combining statistics, applied mathematics, and engineering. Aircraft noises are an impact of enormous financial, environmental, and technological issue. Aircraft noise remains the key inhibitor of the growth of air transportation and remains an acute environmental problem that requires advanced solutions. To advance our understanding of the sound source mechanisms, it should be noted that predominant noise sources of aircraft engines are from the exhaust (referred to as the jet) and fan (including the stator). The noise generated in these two areas during takeoff and landing has a strong influence on the communities around the airports. One of the most important sources of aircraft noises in modern jet aircraft is the turbulence that occurs in the shear layers around the engine’s exhaust. But this is not just an academic issue also jet noise is highly relevant to the aviation industry and on a wider scale, has been related to economic, social, and subsequently political. To deal with this problem, aircraft manufacturers and public establishments are engaged in research on technical and theoretical approaches for noise reduction concepts that should be applied to new aircraft. This review paper discusses a selection of enabling technologies and their implications on acoustics and noise and gives a perspective on future trends and new directions in aeroacoustics required to address the challenges.
- Published
- 2020
33. Multiple input multiple output Dirty paper coding: System design and performance
- Author
-
Dinesh Rajan and Zouhair Al-qudah
- Subjects
Space–time block code ,Noise ,Convolutional code ,Electronic engineering ,Dirty paper coding ,Data_CODINGANDINFORMATIONTHEORY ,Low-density parity-check code ,Antenna diversity ,Algorithm ,Decoding methods ,Coding gain ,Computer Science::Information Theory ,Mathematics - Abstract
In this paper, a practical multiple input multiple output Dirty paper coding (MIMO-DPC) scheme is designed to cancel the effect of additive interference that is known perfectly to the transmitter. The proposed system uses a trio of encoders — a LDPC code, a vector quantizer implemented as a convolutional decoder and an Orthogonal space time block code (STBC) to achieve temporal coding gain, interference cancelation and spatial diversity, respectively. First, we derive the equivalent noise seen by the receiver using an equivalent lattice based dirty paper code. Then the optimal value of the power inflation factor, which is one of the key system parameters used to minimize the equivalent noise seen by the receiver is derived. Furthermore, we analytically prove that the equivalent noise seen by the receiver tends to 0 for large number of receive antennas. Performance results in the case of various number of receiver antennas are presented and show that significant reduction in bit error probabilities can be obtained over a system that uses no interference cancelation.
- Published
- 2012
34. Carbon Copying Onto Dirty Paper.
- Author
-
Khisti, Ashish, Erez, Uri, Lapidoth, Amos, and Wornell, Gregory W.
- Subjects
- *
WIRELESS communications , *MULTICASTING (Computer networks) , *NOISE , *ANTENNAS (Electronics) , *GAUSSIAN processes , *NUMERICAL analysis , *MATHEMATICAL analysis , *ELECTRICAL engineering - Abstract
A generalization of the problem of writing on dirty paper is considered in which one transmitter sends a common message to multiple receivers. Each receiver experiences on its link an additive interference (in addition to the additive noise), which is known noncausally to the transmitter but not to any of the receivers. Applications range from wireless multiple-antenna multicasting to robust dirty paper coding. We develop results for memoryless channels in Gaussian and binary special cases. In most cases, we observe that the availability of side information at the transmitter increases capacity relative to systems without such side information, and that the lack of side information at the receivers decreases capacity relative to systems with such side information. For the noiseless binary case, we establish the capacity when there are two receivers. When there are many receivers, we show that the transmitter side information provides a vanishingly small benefit. When the interference is large and independent across the users, we show that time sharing is optimal. For the Gaussian case, we present a coding scheme and establish its optimality in the high signal-to-interference-plus-noise limit when there are two receivers. When the interference power is large and independent across all the receivers, we show that time-sharing is again optimal. Connections to the problem of robust dirty paper coding are also discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
- View/download PDF
35. [Paper] Efficient Channel Estimation Scheme under Impulsive Noise Environment
- Author
-
Akira Nakamura, Hirotomo Yasui, and Makoto Itami
- Subjects
Scheme (programming language) ,Computer science ,business.industry ,Orthogonal frequency-division multiplexing ,05 social sciences ,050801 communication & media studies ,020207 software engineering ,02 engineering and technology ,Computer Graphics and Computer-Aided Design ,Noise ,0508 media and communications ,Control theory ,Signal Processing ,0202 electrical engineering, electronic engineering, information engineering ,Media Technology ,Telecommunications ,business ,computer ,Communication channel ,computer.programming_language - Published
- 2016
36. [Paper] Channel Estimation Scheme under Class A Impulsive Noise Environment
- Author
-
Kohei Ohno, Hirotomo Yasui, Akira Nakamura, and Makoto Itami
- Subjects
Pilot signal ,Scheme (programming language) ,Computer science ,Orthogonal frequency-division multiplexing ,business.industry ,020302 automobile design & engineering ,020207 software engineering ,02 engineering and technology ,Computer Graphics and Computer-Aided Design ,Noise ,0203 mechanical engineering ,Control theory ,Signal Processing ,0202 electrical engineering, electronic engineering, information engineering ,Media Technology ,Telecommunications ,business ,computer ,computer.programming_language ,Communication channel - Published
- 2016
37. Erratum to the paper 'Extinction and ergodic stationary distribution of a Markovian-switching prey-predator model with additional food for predator'
- Author
-
Dehao Ruan and Xiaoxia Guo
- Subjects
education.field_of_study ,Extinction ,Stationary distribution ,Applied Mathematics ,Population ,White noise ,Predation ,Noise ,Modeling and Simulation ,Statistical physics ,education ,Environmental noise ,Predator ,Mathematics - Abstract
In this work we have studied a stochastic predator-prey model where the prey grows logistically in the absence of predator. All parameters but carrying capacity have been perturbed with telephone noise. The prey’s growth rate and the predator’s death rate have also been perturbed with white noises. Both of these noises have been proved extremely useful to model rapidly fluctuating phenomena Dimentberg (1988). The conditions under which extinction of predator and prey populations occur have been established. We also give sufficient conditions for positive recurrence and the existence of an ergodic stationary distribution of the positive solution, red which in stochastic predator-prey systems means that the predator and prey populations can be persistent, that is to say, the predator and prey populations can be sustain a quantity that is neither too much nor too little. In our analysis, it is found that the environmental noise plays an important role in extinction as well as coexistence of prey and predator populations. It is shown in numerical simulation that larger white noise intensity will lead to the extinction of the population, while telephone noise may delay or reduce the risk of species extinction.
- Published
- 2020
38. Understanding Robust Design with Paper Helicopter Experiment
- Author
-
Yong Tae Kim, Jai-Hyun Byun, and Min Ji Lee
- Subjects
Taguchi methods ,Engineering ,Noise ,Signal-to-noise ratio ,Operations research ,business.industry ,Fractional factorial design ,Applied research ,Factorial experiment ,Sensitivity (control systems) ,business ,Engineering research ,Industrial engineering - Abstract
Jai-Hyun Byun ․Yong Tae Kim․Min Ji LeeDepartment of Industrial and Systems Engineering and Engineering Research Institute Gyeongsang National University, Jinju, 660-701Robust design method developed by Genichi Taguchi has been very popular since the 1980s and there have been many academic and applied research works on this topic. However, college students and engineers in companies have had difficulty in understanding the method. This paper presents a procedure to implement the robust design method by an easy-to-execute paper helicopter experiment. A crossed array was adopted, which consists of a resolution IV fractional factorial design with 6 control factors and a factorial design with 3 noise factors. Three performance measures were analyzed; signal-to-noise ratio, mean, and standard deviation of the falling time of the paper helicopter that is to be maximized. Control-noise interaction plots are also given to evaluate the degree of the sensitivity of each level of the control factors to the noise factors. The procedure presented in this paper can be helpful to those who want to have basic knowledge in the robust design method.
- Published
- 2013
39. Measurement of Noise Parameters Using 6-Port Network (Invited Paper)
- Author
-
Kyung-Whan Yeom and Abdule-Rahman Ahmed
- Subjects
Noise ,Computer science ,business.industry ,Electrical engineering ,Electronic engineering ,Port (circuit theory) ,business - Published
- 2015
40. [Paper] A Low Noise CMOS Image Sensor with Pixel Optimization and Noise Robust Column-parallel Readout Circuits for Low-light Levels
- Author
-
Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito, and Min-Woong Seo
- Subjects
CMOS sensor ,Pixel ,Computer science ,business.industry ,Computer Graphics and Computer-Aided Design ,Column (database) ,Low noise ,Noise ,Embedded system ,Signal Processing ,Media Technology ,Electronic engineering ,Image noise ,Image sensor ,business ,Electronic circuit - Published
- 2015
41. Comparison of Multiple Measures of Noise Exposure in Paper Mills.
- Author
-
Neitzel, Richard L., Andersson, Marianne, and Andersson, Eva
- Subjects
- *
COMPARATIVE studies , *STATISTICAL correlation , *NOISE-induced deafness , *RESEARCH methodology , *NOISE , *QUESTIONNAIRES , *RADIATION dosimetry , *T-test (Statistics) , *MANUFACTURING industries , *OCCUPATIONAL hazards , *ENVIRONMENTAL exposure , *DESCRIPTIVE statistics ,RESEARCH evaluation - Abstract
Background: Noise exposures are associated with a host of adverse health effects, yet these exposures remain inadequately characterized in many industrial operations, including paper mills. We assessed noise at four paper mills using three measures: (i) personal noise dosimetry, (ii) area noise measurements, and (iii) questionnaire items addressing several different aspects of perceived noise exposure. Methods: We assessed exposures to noise characterized using the three measures and compared the relationships between them. We also estimated the validity of each of the three measures using a novel application of the Method of Triads, which does not appear to have been used previously in the occupational health literature. Results: We collected 209 valid dosimetry measurements and collected perceived noise exposure survey items from 170 workers, along with 100 area measurements. We identified exposures in excess of 85 dBA at all mills. The dosimetry and area noise measurements assigned to individual subjects generally showed good agreement, but for some operations within mill, large differences between the two measures were observed, and a substantial fraction of paired measures differed by >5 dB. Perceived noise exposures varied greatly between the mills, particularly for an item related to difficulty speaking in noise. One perceived noise exposure item related to difficulty hearing due to noise showed strong and significant correlations with both dosimetry and area measurements. The Method of Triads analysis showed that dosimetry measures had the highest estimated validity coefficient (0.70), and that the best performing perceived exposure measure had validity that exceeded that of area measurements (0.48 versus 0.40, respectively). Conclusions: Workers in Swedish pulp mills have the potential for exposures to high levels of noise. Our results suggest that, while dosimetry remains the preferred approach to exposure assessment, perceived noise exposures can be used to evaluate potential exposures to noise in epidemiological studies. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
42. Letter to the Editor (May 17, 2017) concerning the paper 'Impact of road traffic noise on sleep disturbances and attention disorders amongst school children living in Upper Silesian Industrial Zone, Poland'
- Author
-
Tomoyuki Kawada
- Subjects
Sleep Wake Disorders ,Sleep disorder ,Pediatrics ,medicine.medical_specialty ,Letter to the editor ,Public Health, Environmental and Occupational Health ,General Medicine ,Environmental Exposure ,Attention disorders ,Audiology ,medicine.disease ,Industrial zone ,Noise ,Attention Deficit Disorder with Hyperactivity ,Noise, Transportation ,medicine ,Humans ,Sleep (system call) ,Poland ,Psychology ,Child ,Road traffic - Published
- 2017
43. Entropy Amplification Property and the Loss for Writing on Dirty Paper.
- Author
-
Cohen, Aaron S. and Zamir, Ram
- Subjects
- *
ENTROPY , *NOISE , *DISTRIBUTION (Probability theory) , *PROBABILITY theory , *RISK , *DIFFERENCE sets - Abstract
Costa's celebrated "writing on dirty paper" (WDP) shows that the power-constrained channel Y = X + S + Z, with Gaussian Z, has the same capacity as the standard AWGN channel Y = X + Z, provided that the "interference" S (no matter how strong it is) is known at the transmitter. While this ability for perfect interference cancelation is very appealing, it relies heavily on the Gaussianity of the (unknown) noise Z. We construct an example of "bad" noise for writing on dirty paper, namely, "difference set noise". If the interference S is strong, then difference-set noise limits the WDP capacity to at most 2 bits. At the same time, like in the AWGN case, the zero-interference capacity grows without bound with the input constraint. Thus almost 100% of the available capacity is lost in WDP in the presence of difference-set noise. This high capacity loss is due to the "entropy amplification property" (EAP) of noise with an aperiodic probability distribution. Using the EAP and the duality between WDP and Wyner--Ziv source coding, we also give an example of dramatic rate-loss in quantizing encrypted source. [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
44. Dirty-Paper Coding Versus TDMA for MIMO Broadcast Channels.
- Author
-
Jindal, Nihar and Goldsmith, Andrea
- Subjects
- *
COMPARISON (Philosophy) , *BROADCASTING industry , *NOISE , *INVESTIGATIONS , *INFORMATION theory , *DIGITAL electronics - Abstract
We compare the capacity of dirty-paper coding (DPC) to that of time-division multiple access (TDMA) for a multiple-antenna (multiple- input multiple-output (MIMO)) Gaussian broadcast channel (BC). We find that the sum-rate capacity (achievable using DPC) of the multiple-antenna BC Is at most min(M, K) times the largest single-user capacity (i.e., the TDMA sum-rate) in the system, where M is the number of transmit antennas and K is the number of receivers. This result is Independent of the number of receive antennas and the channel gain matrix, and is valid at all signal-to-noise ratios (SNRs). We investigate the tightness of this bound In a time-varying channel (assuming perfect channel knowledge at receivers and transmitters) where the channel experiences uncorrelated Rayleigh fading and In some situations we find that the dirty paper gain is upper-bounded by the ratio of transmit-to-receive antennas. We also show that min(M, K) upper-bounds the sum-rate gain of successive decoding over TDMA for the uplink channel, where M is the number of receive antennas at the base station and K is the number of transmitters. [ABSTRACT FROM AUTHOR]
- Published
- 2005
- Full Text
- View/download PDF
45. Low Frequency Noise in a Paper Mill Control Room
- Author
-
Johanna Bengtsson Ryberg, Agneta Agge, and Kerstin Persson Waye
- Subjects
Engineering ,Acoustics and Ultrasonics ,Infrasound ,Subjective perception ,Annoyance ,02 engineering and technology ,01 natural sciences ,0203 mechanical engineering ,0103 physical sciences ,Sound pressure ,010301 acoustics ,Sound (geography) ,Simulation ,Civil and Structural Engineering ,geography ,geography.geographical_feature_category ,business.industry ,Mechanical Engineering ,Electrical engineering ,Building and Construction ,Control room ,Noise ,020303 mechanical engineering & transports ,Geophysics ,Mechanics of Materials ,business - Abstract
This field study aimed to evaluate the prevalence of annoyance and disturbance and the subjective perception of the sound environment due to noise, in an old and a new control room at a large paper mill. Working in a control room requires sustained attention and concentration and, in the case of error messages, rapid and correct decisions. In this study, the personnel's responses were collected by questionnaire, and detailed sound measurements were taken in both control rooms. The A-weighted sound pressure level in the new control room was 54.9 dB, a reduction from the 63.5 dB measured in the old room, and the C-weighted sound pressure level was 66.8 dB, a reduction from the 75.2 dB measured in the old room. The new control room was rated as being a less noisy environment; however, the personnel did complain about noise from other computers/equipment, radios, and the new laboratory.
- Published
- 2007
46. Dirty-Paper Coding for the Gaussian Multiaccess Channel With Conferencing.
- Author
-
Bross, Shraga I., Lapidoth, Amos, and Wigger, Michèle
- Subjects
- *
GAUSSIAN processes , *TRANSMITTERS (Communication) , *RANDOM noise theory , *CODE division multiple access , *CODING theory , *SIGNAL processing , *BIT error rate - Abstract
We derive the capacity region of the two-user dirty-paper Gaussian multiaccess channel (MAC) with conferencing encoders. In this MAC, prior to each transmission block, the transmitters can hold a conference in which they can communicate with each other over error-free bit pipes of given capacities. The received signal suffers not only from additive Gaussian noise but also from additive interference, which is known noncausally to the transmitters but not to the receiver. The additive interference is modeled as Gaussian or uniform over a sphere. We show that the interference can be perfectly mitigated, i.e., that the capacity region without interference can also be achieved in its presence. This holds irrespective of whether the transmitters learn the interference before or after the conference. It follows as a corollary that also for the MAC with degraded message sets, the interference can be perfectly mitigated if it is known noncausally to the transmitters. To derive our results, we generalize Costa's single-user writing-on-dirty-paper achievability result to channels with dependent interference and not-necessarily Gaussian noise. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
47. 'Mek Some Noise': Gospel Music and the Ethics of Style in Trinidad. By Timothy Rommen. Music of the African Diaspora 11. Berkeley: University of California Press, 2007. xii + 219pp. $21.95 paper
- Author
-
Ennis B. Edmonds
- Subjects
Cultural Studies ,Style (visual arts) ,History ,Noise ,media_common.quotation_subject ,Religious studies ,Art history ,Gospel ,Theology ,Diaspora ,media_common - Published
- 2009
48. A new extraction method of underglaze brown decorative pattern based on the coupling of single scale gamma correction and gray sharpening.
- Author
-
Fang, Tao, Qin, Dashu, Zhang, Rumeng, Jiang, Yu, and Rui, Xue
- Subjects
PROBLEM solving ,NOISE - Abstract
In order to solve the problem of image quality and morphological characteristics of primary underglaze brown decorative pattern extraction, this paper proposes a method of primary underglaze brown decorative pattern extraction based on the coupling of single scale gamma correction and gray sharpening. The single-scale gamma correction is combined with the gray sharpening method. The single-scale gamma correction improves the contrast and brightness of the image by nonlinear transformation, but may lead to the loss of image detail. Gray sharpening can enhance the high frequency component and improve the clarity of the image, but it will introduce noise. Combining these two technologies can compensate for their shortcomings. The experimental results show that this method can improve the efficiency of last element underglaze brown decorative pattern extraction by enhancing the image retention detail and reducing the influence of noise. The experimental results showed that F1Score, Miou(%), Recall, Precision and Accuracy(%) were 0.92745, 0.82253, 0.97942, 0.92458 and 0.92745, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
49. Active noise control by means of high frequency injection in electric motors.
- Author
-
Skoulaxinos, Stefanos, Wheeler, Pat, and Vakil, Gaurang
- Subjects
ALTERNATING current electric motors ,MOTOR drives (Electric motors) ,ELECTRIC motors ,HUMAN comfort ,NOISE - Abstract
Machine acoustics is an important area of research impacting the quality and comfort of human life. With increased levels of electrification and the wider use of electric motors, the contribution of motor drives towards quieter acoustic systems becomes increasingly important. This paper presents a novel acoustic improvement method involving the use of acoustic waves generated from High Frequency Injection to perform Active Noise Control. Although High Frequency Injection has been used widely in the domain of sensorless motor control, its acoustic generation process has been so far perceived as a negative by‐product. This paper presents the analysis and experimental results from the application of the proposed method to the Helicopter Electro‐Mechanical Actuation System. Considering the extensive use of motor drives in a number of industries, the proposed practice of High Frequency Injection Active Noise Control can have a significant impact to future applications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
50. Trace Extraction and Repair of the F Layer from Pictorial Ionograms.
- Author
-
Wang, Jiayi, Qiao, Lei, Yan, Chunxiao, Qiu, Zhaoyang, and Wang, Kejie
- Subjects
PARAMETER identification ,ALGORITHMS ,NOISE ,PICTURES - Abstract
Publicly available ionograms are often in the form of pictures. This paper proposes a novel algorithm for extracting and repairing the F layer traces from pictorial ionograms. Extensive efforts have been invested in ionogram autoscaling and critical parameter identification to improve the efficiency of scaling algorithms. To obtain the parameters of the F layer automatically, it is necessary to accurately extract the F layer trace. However, research on F layer trace extraction with repair is relatively limited. The method employed in this study makes full use of the characteristics of different types of echoes on the ionograms, and the procedure includes noise preprocessing, coupling noise processing, and trace repair. To enhance the applicability of the repair, two different automatic filling algorithms are adopted to repair the F layer trace. The aim of this paper is to present an adaptive algorithm to automatically extract and repair F layer traces from different pictorial ionograms. The results of Hainan Fuke ionograms illustrate the reliability of the F layer trace extraction and trace repair. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
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