A Forwarding Cooperation Protocol for Plain and Cluster-based Ad Hoc Networks

Peer-reviewed

Parentesco, redes familiares y sociabilidad en el mundo hispanoamericano en los siglos XVII y XIX

Hasta hace algunos años, el interés por la historia de la familia, aunque no era escaso, estaba orientado a enfoques de tipo macrohistórico, ya que el énfasis estaba puesto en las estructuras de la sociedad. La dominación de los planteamientos cuantitativistas impuestos por los Annales, así como la fuerte influencia del marxismo, coadyuvaron en la consideración de la familia, no como objeto de investigación en sí misma, sino como expresión o ilustración de un funcionamiento económico social global. Los numerosos y excelentes trabajos sobre la élite colonial americana ejemplifican esta clase de acercamiento, fundamentado a partir de una reflexión acerca de los grupos sociales definidos en base a criterios socio-económicos. De la misma marreta, si la familia servia de base a los estudios de demografía histórica,lo que se pretendía a través de ella era la deconstrucción de modelos de comportamiento demográfico para un espacio definido. Fuera de estos planteos con sesgos estructuralistas y funcionalistas, la historia de la familia fue el refugio de la historiografia más tradicional y a veces rancia, fundada muchas veces en la aplicación de la reconstrucción genealógica como único método de estudio de los sectotes sociales más poderosos a nivel económico o político.

Parentesco, redes familiares y sociabilidad en el mundo hispanoamericano en los siglos XVIII y XIX

Hasta hace algunos años, el interés por la historia de la familia, aunque no era escaso, estaba orientado a enfoques de tipo macrohistórico, ya que el énfasis estaba puesto en las estructuras de la sociedad. La dominación de los planteamientos cuantitativistas impuestos por los Annales, así como la fuerte influencia del marxismo, coadyuvaron en la consideración de la familia, fio como objeto de investigación en sí misma, sino como expresión o ilustración de un funcionamiento económico social global.

A Fair and Secure Cluster Formation Process for Ad Hoc Networks

An efficient approach for organizing large ad hoc networks is to divide the nodesinto multiple clusters and designate, for each cluster, a clusterhead which is responsible forholding intercluster control information. The role of a clusterhead entails rights and duties.On the one hand, it has a dominant position in front of the others because it manages theconnectivity and has access to other node¿s sensitive information. But on the other hand, theclusterhead role also has some associated costs. Hence, in order to prevent malicious nodesfrom taking control of the group in a fraudulent way and avoid selfish attacks from suitablenodes, the clusterhead needs to be elected in a secure way. In this paper we present a novelsolution that guarantees the clusterhead is elected in a cheat-proof manner.

Cryptographic Energy Costs are Assumable in Ad Hoc Networks

Performance of symmetric and asymmetriccryptography algorithms in small devices is presented. Both temporaland energy costs are measured and compared with the basicfunctional costs of a device. We demonstrate that cryptographicpower costs are not a limiting factor of the autonomy of a deviceand explain how processing delays can be conveniently managedto minimize their impact.

Color ad spectral image assessment using novel quality and fidelity techniques

The ongoing development of the digital media has brought a new set of challenges with it. As images containing more than three wavelength bands, often called spectral images, are becoming a more integral part of everyday life, problems in the quality of the RGB reproduction from the spectral images have turned into an important area of research. The notion of image quality is often thought to comprise two distinctive areas – image quality itself and image fidelity, both dealing with similar questions, image quality being the degree of excellence of the image, and image fidelity the measure of the match of the image under study to the original. In this thesis, both image fidelity and image quality are considered, with an emphasis on the influence of color and spectral image features on both. There are very few works dedicated to the quality and fidelity of spectral images. Several novel image fidelity measures were developed in this study, which include kernel similarity measures and 3D-SSIM (structural similarity index). The kernel measures incorporate the polynomial, Gaussian radial basis function (RBF) and sigmoid kernels. The 3D-SSIM is an extension of a traditional gray-scale SSIM measure developed to incorporate spectral data. The novel image quality model presented in this study is based on the assumption that the statistical parameters of the spectra of an image influence the overall appearance. The spectral image quality model comprises three parameters of quality: colorfulness, vividness and naturalness. The quality prediction is done by modeling the preference function expressed in JNDs (just noticeable difference). Both image fidelity measures and the image quality model have proven to be effective in the respective experiments.

De cantico Israëlitarum ad Beerah, numer. XXI. 17. 18

Arkit: 1 arkintunnukseton lehti, A4 B1.

Examen variarum lectionum, quas ad textum Jesaiae hebraeum Alexandrina versio exhibet

Dedicatio: Jacobus Haartman, Petrus Bonsdordd [kr. runo].

Loca quaedam difficiliora epistolae Pauli ad Galatas

Arkit: 1 arkintunnukseton lehti, A-B4 C2.

Indicia mineralogiae Fennicae, ab ortu christianismi ad jacta fundamenta Academiae Aboensis

Invocatio: D.D.

De obligatione reciproca parentum & liberorum ad alimenta praestanda

Invocatio: [hepreaa].

Ad mineralogiam Fennicam momenta

Arkit: 1 arkintunnukseton lehti, B7.

Examen variarum lectionum, quas ad textum Jesaiae hebraeum Alexandrina versio exhibet

Arkit: D-E4.

De Aegyptiis & Cuschaeis ad Deum conversis, Psal. LXVIII: v. 32

Invocatio: D.A.G.