Relevant bibliographies by topics / KFFM

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'KFFM'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "KFFM"

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Bi, Xiaobo, Jiansheng Lin, Daijie Tang, Fengrong Bi, Xin Li, Xiao Yang, Teng Ma, and Pengfei Shen. "VMD-KFCM Algorithm for the Fault Diagnosis of Diesel Engine Vibration Signals." Energies 13, no. 1 (January 2, 2020): 228. http://dx.doi.org/10.3390/en13010228.

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Accurate and timely fault diagnosis for the diesel engine is crucial to guarantee it works safely and reliably, and reduces the maintenance costs. A novel diagnosis method based on variational mode decomposition (VMD) and kernel-based fuzzy c-means clustering (KFCM) is proposed in this paper. Firstly, the VMD algorithm is optimized to select the most suitable K value adaptively. Then KFCM is employed to classify the feature parameters of intrinsic mode functions (IMFs). Through the comparison of many different parameters, the singular value is selected finally because of the good classification effect. In this paper, the diesel engine fault simulation experiment was carried out to simulate various faults including valve clearance fault, fuel supply fault and common rail pressure fault. Each kind of machine fault varies in different degrees. To prove the effectiveness of VMD-KFCM, the proposed method is compared with empirical mode decomposition (EMD)-KFCM, ensemble empirical mode decomposition (EEMD)-KFCM, VMD-back propagation neural network (BPNN), and VMD-deep belief network (DBN). Results show that VMD-KFCM has advantages in accuracy, simplicity, and efficiency. Therefore, the method proposed in this paper can be used for diesel engine fault diagnosis, and has good application prospects.
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Hossein-Abad, Hadi Mahdipour, Mohsen Shabanian, and Iman Abaspur Kazerouni. "Vectorized Kernel-Based Fuzzy C-Means: a Method to Apply KFCM on Crisp and Non-Crisp Numbers." International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems 28, no. 04 (August 2020): 635–59. http://dx.doi.org/10.1142/s0218488520500270.

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Kernel methods are a class of algorithms for pattern analysis to robust them to noise, overlaps, outliers and also unequal sized clusters. In this paper, kernel-based fuzzy c-means (KFCM) method is extended to apply KFCM on any crisp and non-crisp input numbers only in a single structure. The proposed vectorized KFCM (VKFM) algorithm maps the input (crisp or non-crisp) features to crisp ones and applies the KFCM (with prototypes in feature space) on them. Finally the resulted crisp prototypes in the mapped space are influenced by an inverse mapping to obtain the prototypes’ (centers’) parameters in the input features space. The performance of the proposed method has been compared with the conventional FCM and KFCM and other new methods, to show its effectiveness in clustering of gene expression data and segmentation of land-cover using satellite images. Simulation results show good accuracy of proposed method in compare to other methods.
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Dubey, Bhoomika. "Image Segmentation using KFCM." International Journal for Research in Applied Science and Engineering Technology 7, no. 6 (June 30, 2019): 2107–11. http://dx.doi.org/10.22214/ijraset.2019.6351.

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Hjermitslev, Hans Henrik. "Fra Marken til Arenaen." Forum for Idræt 33 (February 1, 2018): 82–99. http://dx.doi.org/10.7146/ffi.v33i1.109047.

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Formålet med denne artikel er at benytte Tvis KFUM som case til at beskrive dele af den generelle udvikling inden for klubhåndbolden i Danmark. Historien om Tvis KFUM er nemlig på mange måder typisk for de ændringer, der har fundet sted i mange succesrige landsby- og KFUM-klubber gennem de sidste 40 år. Klubben er således gået fra at være en lokalt og ideologisk forankret kristen forening til at blive et professionelt aktieselskab med regionalt fokus. Den har samtidig været igennem følelsesladede fusionsprocesser og økonomiske vanskeligheder i denne transformation fra forening til forretning.
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Raghavulu, Vivaram, and Ande Prasad. "Moving Object Segmentation Using Level Set Algorithm with GWO-KFCM Clustering." International Journal of Intelligent Engineering and Systems 13, no. 6 (December 31, 2020): 374–83. http://dx.doi.org/10.22266/ijies2020.1231.33.

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Video analytics is widely used to automatically analyze the videos to extract the required information and detect the various events object identification and traffic analysis. The segmentation of the image is referring to extracting the required region from an image. The major objective of the segmentation process is to cluster the images without being affected by the noises. The detection of the moving objects is a challenging task in video analysis due to the dynamic background of the video. The major drawback of the existing Kernel Fuzzy C-Means (KFCM) clustering is initialization of random centroids which increases the execution time to identify the segmented portions. In this research, the Grey Wolf Optimization (GWO) algorithm used to initialize the centroids of required clusters in KFCM and Level Set (LS) Algorithm is used to segment the objects in video sequence. The proposed KFCM-GWO-LS is implemented for moving and static object detection in the videos obtained from SBM-RGBD dataset. For object detection, determining central clusters are important which is performed by using KFCM. GWO helps in finding the best centroids clusters by matching with KFCM. The centroids clusters are segmented by using LS algorithm which undergoes over segmentation problem that is overcome by GWO. As all the three techniques are dependent on one another hybrid of all these techniques obtains better results. The proposed KFCM-GWO-LS is evaluated in terms of Recall, Specificity, Precision and F-measure and the experimental results showed that the proposed method improved the system performance from 0.3 % to 14.35 % compared to existing methods Multi-Sensor Scheduler Algorithm and Statistical Inference Theory model.
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Zhang, Hongmao, Haiyang Gao, Zheng Yang, Zhenzhen Wang, Yang Luo, and Zhibin Zhang. "Effects of interspecific competition on food hoarding and pilferage in two sympatric rodents." Behaviour 151, no. 11 (2014): 1579–96. http://dx.doi.org/10.1163/1568539x-00003201.

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Food hoarding and pilferage in rodents may be regulated by intense competition between sympatric species that have similar habitats, diets and activity, but studies exploring this remain rare. Here, we used semi-natural enclosures to investigate food-hoarding and cache pilferage interactions between sympatric Korean field mice (KFM) (Apodemus peninsulae) and Chinese white-bellied rats (CWR) (Niviventer confucianus). KFM and CWR have similar diets, habitat and nocturnal activity, but the smaller KFM larder and scatter hoards and larger CWR larder hoard only. We found that KFM harvest, larder-hoard and eat seeds at a greater intensity when CWR are present as an audience (present but cannot pilfer). KFM ate 11.5%, re-larder-hoarded 17.9% and re-scatter-hoarded 1.3% of their scatter-hoarded seeds, and ate 29.3% of their larder-hoarded seeds when CWR were present as pilferers. A total of 12.8% of the seeds scatter-hoarded and 50% of seeds directly put on the ground by KFM were pilfered by CWR. CWR did not alter hoarding intensity in the presence of KFM and their stores cannot be pilfered by KFM. These results indicate that large-sized rodent species (more dominant) significantly increase the hoarding intensity of small-sized species and show a unidirectional pilferage of seeds cached by small-sized species. The behavioural differences between these two species may reduce competition for resources and promote coexistence between sympatric rodents.
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Chen, Wei Tong, Hew Cameron Merrett, Shih Tong Lu, and Leonard Mortis. "Analysis of Key Failure Factors in Construction Partnering—A Case Study of Taiwan." Sustainability 11, no. 14 (July 23, 2019): 3994. http://dx.doi.org/10.3390/su11143994.

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Construction partnering is commonly touted as a win-win arrangement for project owners and contractors alike. The failure or success of construction partnering arrangements is contingent upon a multitude of influences, many of which can be controlled through careful planning and active project management. This study examines the key failure factors (KFFs) of construction partnering projects based on data collected from a survey of industry professionals in Taiwan. Methods: Factor analysis is performed using data gathered from a survey of industry practitioners operating in Taiwan to identify KFFs and better understand the level of significance of each factor. A total of 15 failure variables (FV) were included in the survey. This study applied Principle Components Analysis to classify groups of crucial FV relevant to construction partnering based on their relative perceived contribution to project failure. Study results confirm that there are four KFFs to partnering failure in construction projects; they are absence of agility, collaboration barriers, partnering barriers, and organizational management barriers. The biggest influencer on partnership failure in construction projects is the association between absence of agility and organizational management barriers, while the next most significant is the relationship between collaboration barriers and partnering barriers. Avoiding failure of construction partnering requires careful planning and management considerations of the four KFFs found.
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Liu, Bowen, Ting Zhang, Yujian Li, Zhaoying Liu, and Zhilin Zhang. "Kernel Probabilistic K-Means Clustering." Sensors 21, no. 5 (March 8, 2021): 1892. http://dx.doi.org/10.3390/s21051892.

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Kernel fuzzy c-means (KFCM) is a significantly improved version of fuzzy c-means (FCM) for processing linearly inseparable datasets. However, for fuzzification parameter m=1, the problem of KFCM (kernel fuzzy c-means) cannot be solved by Lagrangian optimization. To solve this problem, an equivalent model, called kernel probabilistic k-means (KPKM), is proposed here. The novel model relates KFCM to kernel k-means (KKM) in a unified mathematic framework. Moreover, the proposed KPKM can be addressed by the active gradient projection (AGP) method, which is a nonlinear programming technique with constraints of linear equalities and linear inequalities. To accelerate the AGP method, a fast AGP (FAGP) algorithm was designed. The proposed FAGP uses a maximum-step strategy to estimate the step length, and uses an iterative method to update the projection matrix. Experiments demonstrated the effectiveness of the proposed method through a performance comparison of KPKM with KFCM, KKM, FCM and k-means. Experiments showed that the proposed KPKM is able to find nonlinearly separable structures in synthetic datasets. Ten real UCI datasets were used in this study, and KPKM had better clustering performance on at least six datsets. The proposed fast AGP requires less running time than the original AGP, and it reduced running time by 76–95% on real datasets.
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Mogstad, T., S. J. Cyvin, B. N. Cyvin, J. Brunvoll, and G. Díaz Fleming. "Molecular Vibrations of Aluminum Trichloride Monomer with Application of the Keating Bendings." Zeitschrift für Naturforschung A 40, no. 4 (April 1, 1985): 373–78. http://dx.doi.org/10.1515/zna-1985-0410.

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The vibrational spectra and previous normal coordinate analyses of AICI3 are reviewed. The valence force field (VFF), central force field (CFF) and Keating force field (KFF) are tested. KFF is found to be the best one of these approximations with regard to the agreement with an observed isotopic frequency. A final force field is taken from a very recent work. It confirms that KFF is superior to both CFF and KFF. The data of a Coriolis constant, mean amplitudes of vibration and the Bastiansen-Morino shrinkage effect are calculated and discussed.
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Schnee, Ian. "THERE IS NO KNOWLEDGE FROM FALSEHOOD." Episteme 12, no. 1 (October 7, 2014): 53–74. http://dx.doi.org/10.1017/epi.2014.26.

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AbstractA growing number of authors defend putative examples of knowledge from falsehood (KFF), inferential knowledge based in a critical or essential way on false premises, and they argue that KFF has important implications for many areas of epistemology (whether evidence can be false, the Gettier debate, defeasibility theories of knowledge, etc.). I argue, however, that there is no KFF, because in any supposed example either the falsehood does not contribute to the knowledge or the subject lacks knowledge. In particular, I show that if the subject actually has knowledge in putative KFF cases, then there is always a veridical evidential path meeting the basing conditions that accounts for her knowledge; if there is no such path, then the subject is in a type of Gettier case. All the recent arguments that rely on KFF are therefore based on a mistake.
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Dissertations / Theses on the topic "KFFM"

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Scott, Kristoffer, and Tasmin Hoque. "Ideella organisationer och den lärande funktionen : En fallstudie av KFUM Sverige." Thesis, Södertörns högskola, Institutionen för samhällsvetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-30501.

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Bakgrund och problem: Lärande inom organisationer har effekt på hur organisationer hanterar förändring och anpassar sin organisation för en förbättrad effektivitet, vilket kan leda till konkurrensfördelar. Det är intressant att se på ideella organisationer och deras lärande funktion då organisationsformen skiljer sig från den privata sektorn där företag i större utsträckning arbetar med lärande mer strukturellt medan ideella organisationer ofta baserar sin lärande funktion på lösa samtal. Vår undersökning tar avstamp från detta och mer specifikt i den ideella organisationen KFUM Sverige. Eftersom det är en organisation som sysslar med en rad olika aktiviteter har vi valt att smala av undersökningsområdet till de basketföreningar som har koppling till KFUM. Syfte: Syftet med denna studie är att undersöka hur KFUM arbetar som lärande organisation och hur de lokala KFUM-basketföreningarna har arbetat för att öka medlemsantalet. Potentiellt kan vi få en bild av hur en ideell organisation arbetar som en lärande organisation och huruvida de tar tillvara på intern kunskapsförmedling mellan sina underföreningar. Metod: Vår studie grundar sig i en djupare förståelse för dels människors agerande men även rutiner och arbetssätt inom olika föreningar, valde vi att genomföra intervjuer med personer från basketföreningar med KFUM-anknytning samt en intervju med personen som arbetar som kommunikationsansvarig hos KFUM Sverige, vars arbetsuppgifter behandlar kommunikation med KFUM:s föreningar i hela Sverige. Resultat och slutsats: Efter genomförd studie kan vi dra slutsatserna att KFUM:s basketföreningar är förändringsbenägna och de arbetar som lärande organisationer på individuell nivå men att KFUM Sverige, på nationell nivå, har brister i sin lärande förmåga. Vi anser att detta skulle kunna förbättras genom införande av system som gynnar kunskapsdelning och att organisationen i sig behöver arbeta för att förbättra sin organisatoriska identitet då detta är ett sätt för organisationen att få en organisationskultur som främjar lärande mellan de lokala föreningarna.
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You, Lin. "Optimisation de la mesure de travail de sortie par microscopie à sonde locale sous vide : application aux dispositifs avancés." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00843031.

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La compréhension des propriétés électriques de nano-objets est essentielle pour le développement s des nanotechnologies. La microscopie à force Kelvin (KFM) est une des techniques les plus utiles pour cartographier simultanément la topographie et la différence de potentiel de contact (CPD) à l'échelle nanométrique. Après 20 ans de développement, la KFM est principalement utilisé dans des conditions normales de pression et de température, permettant d'effectuer, de manière simple, de multiples analyses comparatives. Toutefois, sous ultra-vide (UHV), comme la surface est contrôlée et que la sensibilité est meilleure, des mesures plus précises et plus fiables sont réalisables. Dans la première partie, la mesure KFM sous atmosphère ambiante est améliorée en développant la technique simple-passage à la fois en modulation de fréquence (FM) et en modulation d'amplitude (AM). Une électronique externe Nanonis a été adaptée sur les AFMs commerciaux (Dimension 3100 et MultiMode, Bruker). Une étude comparative avec le mode Lift a été réalisée sur des couches de graphène épitaxié sur échantillon de SiC. L'effet de la distance pointe-échantillon sur le contraste et la résolution est décrit ainsi que l'influence des paramètres expérimentaux. Une amélioration significative du contraste et de la résolution est clairement observée sur les résultats obtenus par la technique simple passage en modulation de fréquence, indépendamment de la distance pointe-échantillon. Dans une deuxième partie, la technique KFM est développée sous vide secondaire. Le travail instrumental est réalisé sur un AFM EnviroScope de chez Bruker, qui a été équipé d'une électronique externe Nanonis, permettant de mesurer simultanément la topographie en mode non-contact et la CPD en modulation d'amplitude ou de fréquence. Les résultats montrent que la CPD mesurée est comparable à celle obtenue avec une mesure sous ultravide. Enfin, après avoir posé les bases à la fois expérimentale et théorique de la KFM, cette technique est utilisée pour caractériser les hétérostructures CdTe/CdS en films minces utilisés pour les applications de cellules solaires. Un protocole de préparation d'échantillon sur la tranche a été spécialement développé. L'hétérojonction CdTe/CdS est étudiée sous polarisation à la fois dans l'obscurité et sous éclairement. L'influence de l'épaisseur de la couche de CdS est également étudiée pour comprendre son effet dramatique sur le rendement des cellules solaires.
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Gaillard, Nicolas. "Etude des propriétés morphologiques, électriques et chimiques de l'interface métal/isolant et de leur impact sur les performances de la capacité TiN/Ta2O5/TiN." Grenoble 1, 2006. http://www.theses.fr/2006GRE10250.

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La course à la miniaturisation en microélectronique impose aujourd'hui l'introduction de films métalliques et d'isolants de forte permittivité dans la fabrication des transistors MOS et des capacités MIM afin d'augmenter leur densité tout en maintenant leurs performances électriques. Cependant, l'intégration de ces matériaux doit faire face à certains phénomènes physiques localisés au niveau de l'interface métal/isolant qui peuvent dégrader les performances de ces composants. De ce fait, le choix des matériaux employés ne peut se faire sur la simple considération de leurs propriétés intrinsèques et passe nécessairement par une analyse poussée des propriétés de l'interface qu'ils forment. Nous présentons dans notre étude une caractérisation fine des différentes propriétés de l'interface TiN/Ta2O5 ainsi que leur impact sur les performances de la capacité MIM 5fF. Mm-2. Nous étudions dans un premier temps l'effet de la rugosité des interfaces sur les caractéristiques courant-tension de la capacité MIM. Des simulations « in situ » du champ électrique établi dans ce dispositif indiquent alors que la topographie propre à chaque interface peut conduire à des caractéristiques électriques asymétriques. Notre analyse porte ensuite sur les phénomènes fondamentaux qui gouvernent la valeur du travail de sortie des couches métalliques. Cette analyse nécessite l'utilisation d'une technique de microscopie électrique à sonde locale (KFM) qui permet notamment d'observer l'impact de la cristallinité des films sur leurs travaux de sortie. Enfin, l'effet de la composition chimique de l'interface TiN/Ta2O5 sur la hauteur de barrière est présenté. Cette étude, réalisée par spectroscopie de photoélectrons X et UV, permet de construire le diagramme de bande complet de la structure MIS TiN/Ta2O5/Si. On constate alors un décalage important des niveaux du vide aux différentes interfaces induit par la présence de dipôles
Current scaling trend in microelectronic involves the introduction of metals and high-k dielectrics in MOS transistors and MIM capacitors manufacturing in order to maintain their electrical performances. Nevertheless, the integration of these materials must deal with some physical phenomena localized at the metal/insulator interface that can degrade the devices performances. As a result, the choice of materials cannot be done on the simple consideration of their intrinsic properties and necessarily passes by a careful analysis of the properties of the interface formed. We present in this study fine characterizations of the TiN/Ta2O5 interface properties as well as their impact on the performances of the MIM 5fF. Mm-2 capacitor. We first present the impact of interfaces roughness on leakage-current characteristics of MIM capacitors. “In situ” simulations of the electric field in the device indicate that each interface topography can lead to asymmetrical MIM electrical behavior. Next, our analysis treats the fundamental properties which control metal layers work function. This study requires the use of a local probe (KFM) which allows to characterize the impact of metal films crystallography on work function. Finally, the effect on the barrier height of the TiN/Ta2O5 interface chemistry is presented. This study, carried out by X-ray and UV-ray photoelectrons spectroscopy, provides the complete band diagram of the TiN/Ta2O5/Si MIS structure. We report here large shifts of the vacuum level induced by dipoles at both the Si/Ta2O5 and Ta2O5/TiN interfaces
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Zardini, Sabrina Verfasser], Andreas [Akademischer Betreuer] [Liening, and Ilona [Gutachter] Ebbers. "Employability und Geschäftsprozessorientierung : Modellentwicklung und Wirkungsanalyse im Kontext der kfm. Ausbildung / Sabrina Zardini. Betreuer: Andreas Liening. Gutachter: Ilona Ebbers." Dortmund : Universitätsbibliothek Dortmund, 2012. http://d-nb.info/1103586610/34.

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Zardini, Sabrina [Verfasser], Andreas [Akademischer Betreuer] Liening, and Ilona [Gutachter] Ebbers. "Employability und Geschäftsprozessorientierung : Modellentwicklung und Wirkungsanalyse im Kontext der kfm. Ausbildung / Sabrina Zardini. Betreuer: Andreas Liening. Gutachter: Ilona Ebbers." Dortmund : Universitätsbibliothek Dortmund, 2012. http://d-nb.info/1103586610/34.

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Brault, Sébastien. "Etude du procédé de transfert de filmsApplications : Encapsulation sur tranche et élaboration de micro-dispositifs (thèse Cifre IEF-KFM technology)." Paris 11, 2010. http://www.theses.fr/2010PA112100.

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Les microsystèmes nécessitent généralement d'être insérés dans un environnement parfaitement contrôlé afin de permettre d'une part, un mode de fonctionnement optimum (vide par exemple lorsque le facteur de qualité doit être élevé) ou d'autre part, de pouvoir relier ses caractéristiques de sortie aux conditions de fonctionnement. Il est donc important de pouvoir les placer dans un boitier de protection parfaitement adapté. Avant cela, le dispositif doit être découpé dans le substrat de silicium. Cette étape de découpe est critique car elle nécessite l'utilisation d'un jet de fluide sur la surface pouvant entrainer l'endommagement partiel ou complet du dispositif ou encore provoquer le collage de la partie désolidarisée du substrat. Nous avons imaginé un procédé original de report de film sur le dispositif afin d'assurer la protection du MEMS durant cette étape de découpe. Ce procédé utilise la technologie de transfert, à savoir que les capots protecteurs sont élaborés sur un substrat spécifique puis désolidarisé de ce substrat pour venir recouvrir le substrat recouvert de structures MEMS. Plus largement, ce procédé universel permet de réaliser un très grand choix de microdispositifs (jauges Pirani par exemple). Ainsi, ce procédé a été entièrement qualifié pour des applications de packaging puis étendu au report de microstructures
Generally microsystems require to be inserted in an environment perfectly controlled in order to allow an optimum functioning process (vacuum for example when the quality factor must be high) or to be able to connect its exit characteristics to the operating conditions. It is thus important to be able to place them in a perfectly adapted packaging of protection. Before that, the device must be cut out in the silicon substrate. This cutting step is critical because it requires the use of a fluid jet on surface which can involve the partial or complete damage device or cause the sticking effect of microdevices on the substrate. We imagined an original film transfer process on the device in order to ensure the MEMS protection during this cutting step. This process uses the transfer technology, namely that micro-caps are elaborate on a specific substrate then separated of this substrate to protect to micro-structures on the final substrate. More largely, this universal process makes it possible to carry out a very great choice of microdevices (Pirani gauges for example). Thus, this process was fully qualified for packaging applications then extended to microstructures transfer
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Gouveia, Rubia Figueredo. "Padrões eletrostaticos e nanomecânicos de superfícies isolantes = um estudo por microscopia de força Kelvin (KFM) e microscoscopia de força pulsada digital (DPFM)." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250319.

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Orientador: Fernando Galembeck
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica
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Resumo: Os fenômenos eletrostáticos e suas consequências são familiares para a maioria das pessoas, mas o conhecimento sobre este tópico ainda é bastante empírico. Persistem grandes dificuldades na correlação de idéias fundamentais da teoria atômico-molecular com observações experimentais da eletrostática de materiais isolantes. A hipótese explorada nessa tese é: a atmosfera é uma fonte de cargas elétricas em isolantes, devido à partição de grupos OH- e H+ associados à adsorção de água. Logo, interações específicas entre íons presentes na água e sólidos isolantes contribuem para os padrões de cargas. Neste trabalho foram analisados padrões eletrostáticos em uma superfície de sílica recoberta por eletrodos de ouro produzidos por técnicas microlitográficas e partículas amorfas de fosfato de alumínio e sílica de Stöber utilizando a microscopia de força Kelvin (KFM) sob umidade relativa controlada. Os potenciais elétricos sobre a superfície de sílica dependem fortemente da umidade relativa, bem como da polarização dos eletrodos de ouro. A formação e dissipação dos padrões eletrostáticos são mais rápidas sob altas umidades. Já em baixas umidades a preservação dos potenciais elétricos é mais efetiva. Os potenciais elétricos das partículas de sílica e fosfato de alumínio são fortemente influenciados pela umidade relativa, sendo alterados mesmo em um ambiente completamente isolado eletricamente e aterrado. Os potenciais são modificados por eventos de adsorção e dessorção de água: sílica de Stöber torna-se mais negativa com o aumento da umidade, enquanto o fosfato de alumínio torna-se menos negativo, na ausência de qualquer ação de indução por um campo elétrico. Os resultados mostraram que a adsorção de água modifica os padrões de cargas de superfícies inorgânicas em escala nanométrica e que a eletroneutralidade não é uma característica geral de materiais isolantes. Neste trabalho também foram examinadas propriedades mecânicas de rigidez e adesão em nanoescala de partículas de fosfato de alumínio e dióxido de titânio, utilizando a microscopia de força pulsada digital (DPFM). As partículas apresentam uma grande heterogeneidade mecânica, mostrando domínios bastante diferenciados entre si. A nanoindentação da ponteira do AFM sobre as partículas mostrou que o dióxido de titânio apresenta maiores valores de rigidez, módulo de Young, força e energia de adesão e de histerese na deformação de suas superfícies.
Abstract: Electrostatic charging is familiar to most persons but knowledge on this topic is still rather empiric, mainly because fundamental ideas on the structure of matter are not well connected to the phenomenology of insulator charging. This thesis explores the following hypothesis: the atmosphere is as an electric charge reservoir for insulators, due to the partition of OH- and H+ groups associated to water adsorption. Thus, specific interactions between ions of adsorbed layers of water and insulating solids contribute to charge patterning. In this work, electrostatic patterning was examined in a silica surface partially covered with sets of interdigitated gold electrodes produced by microlithography techniques and also in aluminum phosphate and Stöber silica amorphous particles, using Kelvin force microscopy (KFM) under controlled relative humidity. Electric potentials acquired from the silica surface depend largely on the relative humidity as well as on the applied potentials at the gold electrodes. Pattern formation and dissipation are much faster under high relative humidity while the charged or discharged silica states are both more stable at low humidity. The electric potential measured along the surface of amorphous particles changes with relative humidity within an electrically shielded and grounded environment. Thus, water adsorption and desorption modify charge status of these particles: Stöber silica surface becomes more negative at higher humidity while aluminum phosphate becomes less negative, without any external electric potential or inductive input. These results show that water adsorption modifies charge status of inorganic surfaces and that electroneutrality is not a widespread characteristic of insulating materials. Another section of the thesis describes local nanomechanical stiffness and adhesion properties for aluminum phosphate and titanium dioxide particles, using digital pulsed force microscopy (DPFM). Aluminum phosphate and titanium dioxide particle domains present a large degree of heterogeneity. Aluminum phosphate particles are softer materials than titanium dioxide, undergoing greater nanoindentation of the AFM tip. On the other hand, titanium dioxide particle surfaces present larger stiffness, Young modulus, tipadhesion force, energy dissipated by hysteresis and detachment energy than aluminum phosphate particles.
Doutorado
Físico-Química
Doutor em Ciências
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Lacroix, Loïc Baret-Blanc Christine Ressier Laurence. "Mécanismes de corrosion localisée de l'alliage d'aluminium 2024 apport de la microscopie à force atomique (AFM) couplée au mode Kelvin (KFM) et des alliages modèles /." Toulouse : INP Toulouse, 2009. http://ethesis.inp-toulouse.fr/archive/00000842.

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Lacroix, Loïc. "Mécanismes de corrosion localisée de l'alliage d'aluminium 2024 : apport de la microscopie à force atomique (AFM) couplée au mode Kelvin (KFM) et des alliages modèles." Phd thesis, Toulouse, INPT, 2008. http://oatao.univ-toulouse.fr/7821/1/lacroix.pdf.

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L'alliage 2024 (Al-Cu-Mg) est, dans le contexte de l'allègement de structure, encore largement utilisé par l'industrie aéronautique. Sa microstructure le rend sensible à la corrosion localisée (corrosion par piqûres, corrosion feuilletante et intergranulaire). Parmi les paramètres microstructuraux, les particules intermétalliques, et notamment les particules de phase S-Al2CuMg, sont dans de nombreux cas un facteur d'endommagement. Ce travail de thèse est donc centré sur leur réactivité ainsi que sur l'apport de techniques locales à cette étude. Dans ce travail, une étude multianalytique a été réalisée. La microscopie à force atomique (AFM pour Atomic Force Microscopy) couplée au mode Kelvin (KFM pour Kelvin Force Microscopy) permettent l'acquisition de la topographie et du potentiel de surface d'un échantillon à l'échelle nanométrique. Le couplage de ces techniques à des analyses chimiques d'extrême surface par SIMS (Secondary Ions Mass Spectroscopy) ainsi que le suivi de la composition des particules lors de leur dissolution (MEB-EDS) ont démontré que l'association AFM-KFM permet le suivi de l'ensemble des phénomènes de dissolution de particules intermétalliques riches en cuivre avec une résolution spatiale de l'ordre de la centaine de nanomètres. En parallèle à ces travaux, l'étude d'alliages et de systèmes modèles par des techniques électrochimiques stationnaires et transitoires telles que la Spectroscopie d'Impédance Electrochimique Locale (SIEL) a été réalisée. Ce travail a permis de montrer la représentativité de ces systèmes pour étudier les phénomènes de microcouplage galvanique entre particules intermétalliques et matrice de l'alliage commercial 2024. La réactivité du couple aluminium/magnésium a été simulée numériquement par la méthode des éléments finis. Les distributions de courant et de potentiel calculées ont été validées par des observations en microscopie optique et électronique.
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Kaja, Khaled. "Développement de techniques nano-sondes pour la meusre du travail de sortie et application aux matériaux en microélectronique." Phd thesis, Grenoble, 2010. http://tel.archives-ouvertes.fr/tel-00515370.

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La mesure fiable et spatialement résolue du travail de sortie de matériaux et nanostructures est l'un des problèmes les plus importants en caractérisation de surface avancée pour les applications technologiques. Parmi les méthodes de mesure du travail de sortie disponibles, la microscopie à sonde de Kelvin (KFM), basé sur l'AFM, et la spectromicroscopie de photoémission d'électrons par rayons X (XPEEM) apparaissent comme les méthodes les plus prometteuses. Nous nous sommes intéressés dans cette thèse à l'investigation de la mesure locale du travail de sortie par KFM sous air ainsi qu'à l'étude de la complémentarité entre les mesures obtenues par KFM et XPEEM. Nous présentons tout d'abord une analyse des variations des mesures KFM avec la distance pointe-échantillon sur différents échantillons métalliques. Ces variations peuvent être expliquées par un modèle simple basé sur des transferts de charges de surfaces associés à l'inhomogénéité locale du travail de sortie. L'influence de la pointe, de l'environnement et des paramètres expérimentaux a été aussi étudié. Nous avons ensuite mis en évidence une augmentation de la résolution spatiale de l'imagerie KFM sous air grâce à la mise en oeuvre, sur le microscope commercial, d'un mode combiné AFM-KFM basé sur l‘acquisition simultanée des mesures KFM et de la topographie de surface. Enfin, nous nous sommes focalisés sur la caractérisation croisée par KFM et XPEEM de couches de graphène épitaxiées sur un substrat SiC(0001). Les images du travail de sortie obtenues par KFM sous air permettent de révéler qualitativement, avec une grande résolution spatiale, l'hétérogéneité de ces couches en surface. La mesure complémentaire par XPEEM spectroscopique au seuil de photoémission montre que cette hétérogéneité est liée à l'augmentation du travail de sortie local dû à une épaisseur de graphène variant entre 1 et 4-5 monocouches d'après la littérature. Ceci est corrélé qualitativement avec les intensités locales Si2p et C1s extraites des images XPEEM correspondantes. Des voies pour la compréhension de cette évolution atypique du travail de sortie d'un matériau, sont esquissées d'après la littérature disponible et les résultats micro-spectroscopiques, en terme de couplage électronique avec le substrat SiC.
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Books on the topic "KFFM"

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Dijkstra, Tialda. Tinkskrift: 75 jier Kristlik Fryske Folksbibleteek, 1934-1984-2009. [Oudehaske, Netherlands]: De Fryske Boekeklub, 2010.

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Kehr, Virginia. Die "Ambrosiagalle" als tripartites Interaktionssytem: Macrophomopsis coronillae (Dsem.), Petrak in Gallen von Aspondylia melanpous Kffr., an Lotus corniculatus L. Berlin: J. Cramer, 1999.

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Næs, Johs Andr. Har úti á Álakeristrøðni. [Nesvík]: Heimamissiónsforlagið, 2005.

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Nordby, Ib. Var vi også med?: KFUM & Ks og FDFs forhold under besættelsen med særlig henblik på holdninger til og deltagelse i modstandsarbejdet. [Odense?]: Odense Universitetsforlag, 1990.

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Seven years among prisoners of war. Athens: Ohio University Press, 1994.

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CERNIGLIA, FLORIANA MARGHERITA. A European Public Investment Outlook. Open Book Publishers, 2020.

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1919-, Gerber Johannes, and Hahn Oswald, eds. Der Soldat als Ökonom: Generalmajor Dipl.-Kfm. Dr. rer. pol. Johannes Gerber zum 70. Geburtstag. Regensburg: Walhalla u. Praetoria Verlag, 1989.

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IEEE International Conference on Communications June 1989 in Boston, Ma/89Ch26559Pbl. Ieee, 1989.

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Zukunftsperspektiven für das Handelsmanagement: Konzepte, Instrumente, Trends : Festschrift für Herrn o. Univ.-Prof. Dipl.-Kfm. Dr. Hans-Peter Liebmann. Frankfurt am Main: Deutscher Fachverlag, 2000.

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Effer-Uhe, Daniel, and Alica Mohnert, eds. Vertragsrecht in der Coronakrise. Nomos Verlagsgesellschaft mbH & Co. KG, 2020. http://dx.doi.org/10.5771/9783748909279.

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Der Ausbruch der Coronakrise verunsichert, aber Verträge sind in der Welt. Was hat Bestand, was bedarf der Anpassung? <b>Der Tagungsband</b> dokumentiert die Beiträge der Online-Tagung „Vertragsrecht in der Coronakrise“ in zitationsfähiger Form. Von grundlegenden dogmatischen Aspekten wie dem allgemeinen Leistungsstörungsrecht über das massenhaft relevante Verbraucher- sowie Mietrecht bis hin zu Spezialfragen in der Insolvenz beantworten Rechtsexperten die drängenden Fragen in der Pandemie, z.B. Wer trägt die Hotelkosten, wenn ein Pauschalreisender wegen Flugausfällen an der Rückreise gehindert ist? Können Arbeitnehmer auf erhöhte Schutzvorkehrungen im Betrieb pochen? Wer haftet, wenn eine Warenlieferung an der Landesgrenze durch überlange Kontrollen verspätet eintrifft oder zwischenzeitlich verdirbt? <b>Herausgeber und Autoren</b> Herausgegeben von PD Dr. Daniel Effer-Uhe und Dipl.-Psych. Alica Mohnert, Mag. iur., LL.M. (CUPL). Mit Beiträgen von Dr. Caspar Behme, Ludwig-Maximilians-Universität München; Dr. Jonas Brinkmann, Universität Bielefeld; Dr. Ann-Marie Kaulbach, Universität zu Köln; Stephan Klawitter, Humboldt-Universität zu Berlin; Jun.-Prof. Dr. Andreas Maurer, Universität Mannheim; PD Dr. Patrick Meier, Notarassessor, Julius-Maximilians-Universität Würzburg; Jun.-Prof. Dr. Jens Prütting, Rechtsanwalt, Bucerius Law School Hamburg; Prof. Dr. Thomas Riehm, Universität Passau; Prof. Dr. Jens M. Schmittmann, Rechtsanwalt, Mitglied des Senats für Anwaltssachen des Bundesgerichtshofs, FOM Hochschule Essen; Dipl.-Kfm. Dr. Bernd Scholl, Rechtsanwalt, Universität zu Köln.
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Book chapters on the topic "KFFM"

1

Lent, Bogdan. "Konfliktmanagement KFM." In IT-Projektmanagement als kybernetisches System, 395–422. Wiesbaden: Springer Fachmedien Wiesbaden, 2013. http://dx.doi.org/10.1007/978-3-8348-2512-4_16.

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Trivedi, Naresh Kumar, Suresh Kumar, Sachin Jain, and Shikha Maheshwari. "KFCM-Based Direct Marketing." In Rising Threats in Expert Applications and Solutions, 495–502. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6014-9_57.

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Mrudula, K., and E. Keshava Reddy. "Improving KFCM-F Algorithm Using Prototypes." In Proceedings of 2nd International Conference on Communication, Computing and Networking, 695–701. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1217-5_69.

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Tao, Chen, and Hong Zeng-lin. "SVM Ensemble Based on Boosting and KFCM." In Advances in Intelligent and Soft Computing, 593–99. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-29455-6_83.

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Arora, Jyoti, and Meena Tushir. "Hybrid KFCM-PSO Clustering Technique for Image Segmentation." In Proceedings of International Conference on Artificial Intelligence and Applications, 443–51. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4992-2_41.

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Song, Hong, Feifei Sun, Xiangfei Cui, Xiangbin Zhu, and Qingjie Zhao. "Breast Tissue Segmentation Using KFCM Algorithm on MR images." In Lecture Notes in Electrical Engineering, 555–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38466-0_62.

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Zhao, Xiaoqiang, and Shouming Zhang. "An Improved KFCM Algorithm Based on Artificial Bee Colony." In Communications in Computer and Information Science, 190–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24282-3_26.

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Tao, Chen, and Hong Zeng-lin. "A Combined Svm Ensemble Algorihm Based on KICA and KFCM." In Advances in Intelligent and Soft Computing, 585–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-29455-6_82.

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Hu, Zhengying, Lujuan Ma, Baoling Liu, and Zhi Zhang. "Parameters Optimization for KFKM Clustering Algorithm Based on WiFi Indoor Positioning." In Human Centered Computing, 311–17. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-74521-3_34.

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Loheswaran, K. "Optimized KFCM Segmentation and RNN Based Classification System for Diabetic Retinopathy Detection." In Lecture Notes in Electrical Engineering, 1309–22. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7961-5_119.

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Conference papers on the topic "KFFM"

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Yang, Aimin, Lingmin Jiang, and Yongmei Zhou. "A KFCM-Based Fuzzy Classifier." In Fourth International Conference on Fuzzy Systems and Knowledge Discovery (FSKD 2007). IEEE, 2007. http://dx.doi.org/10.1109/fskd.2007.50.

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Zinemanas, Pablo, Pablo Cancela, and Martín Rocamora. "MAVD: A Dataset for Sound Event Detection in Urban Environments." In 4th Workshop on Detection and Classification of Acoustic Scenes and Events (DCASE 2019). New York University, 2019. http://dx.doi.org/10.33682/kfmf-zv94.

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Magonov, Sergei, and John D. Alexander. "Multifrequency Approaches in Characterization of Materials With Single-Pass Kelvin Force Microscopy." In ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/detc2010-29225.

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This article presents an implementation of high-resolution imaging in Kelvin force microscopy (KFM) using the multi-frequency approach in the intermittent contact mode. The basic function of atomic force microscopy – high resolution imaging of surface topography is usually performed in the resonant oscillatory modes: amplitude modulation or frequency modulation. When a conducting probe is applied in the AFM-related electric modes it senses also the electrostatic tip-sample forces. Simultaneous and separate detection of the mechanical and electrostatic forces can be realized by using the probe response at different resonant and non-resonant frequencies. In KFM, a nullification of the electrostatic force is applied for detection of a local surface potential. The described experimental set-up and procedures help us to reveal the surface potential variations with high sensitivity and spatial resolution. The examples of KFM studies of metals, semiconductors and molecular systems with dipole moments demonstrate how this technique can be applied for advanced and quantitative characterization of heterogeneous systems.
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Wang, Jian, and Yuanyuan Zhang. "Speaker Recognition Based on KPCA and KFCM." In 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/meic-15.2015.44.

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Hongyi Zhang and Jiexin Pu. "Robust Image Segmentation Using KFCM with Noise Restrained." In 2006 6th World Congress on Intelligent Control and Automation. IEEE, 2006. http://dx.doi.org/10.1109/wcica.2006.1714000.

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Luo, Rui, Xiaodong Liu, Yan Ren, Tianci Ao, and Jie Xi. "Road extraction based on KFCM clustering and morphological operations." In 2018 Chinese Control And Decision Conference (CCDC). IEEE, 2018. http://dx.doi.org/10.1109/ccdc.2018.8407272.

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Yun-song, Shi, and Shi Yu-feng. "Remote sensing image classification and recognition based on KFCM." In Education (ICCSE 2010). IEEE, 2010. http://dx.doi.org/10.1109/iccse.2010.5593412.

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Vijayalakshmi, V., Melingi Sunil Babu, and R. Punitha Lakshmi. "KFCM Algorithm for Effective Brain Stroke Detection through SVM Classifier." In 2018 IEEE International Conference on System, Computation, Automation and Networking (ICSCAN). IEEE, 2018. http://dx.doi.org/10.1109/icscan.2018.8541179.

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Fei, Mei, Zhang Chenyu, Sha Haoyuan, and Zheng Jianyong. "Classification and recognition of voltage sags based on KFCM — SVM." In 2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI). IEEE, 2017. http://dx.doi.org/10.1109/icemi.2017.8265981.

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Wang, Xun. "KFCM Algorithm Based on the Source Code Mining Method Study." In 2014 Fifth International Conference on Intelligent Systems Design and Engineering Applications (ISDEA). IEEE, 2014. http://dx.doi.org/10.1109/isdea.2014.137.

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Reports on the topic "KFFM"

1

Kearny, C. H. The KFM, A Homemade Yet Accurate and Dependable Fallout Meter. Office of Scientific and Technical Information (OSTI), November 2001. http://dx.doi.org/10.2172/814086.

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