A New Gridding Technique for High Density Microarray Images Using Intensity Projection Profile of Best Sub Image

As the technologies for the fabrication of high quality microarray advances rapidly, quantification of microarray data becomes a major task. Gridding is the first step in the analysis of microarray images for locating the subarrays and individual spots within each subarray. For accurate gridding of high-density microarray images, in the presence of contamination and background noise, precise calculation of parameters is essential. This paper presents an accurate fully automatic gridding method for locating suarrays and individual spots using the intensity projection profile of the most suitable subimage. The method is capable of processing the image without any user intervention and does not demand any input parameters as many other commercial and academic packages. According to results obtained, the accuracy of our algorithm is between 95-100% for microarray images with coefficient of variation less than two. Experimental results show that the method is capable of gridding microarray images with irregular spots, varying surface intensity distribution and with more than 50% contamination

A New Fast Fractal Modeling Approach for the Detection of Microcalcifications in Mammograms

In this paper, a novel fast method for modeling mammograms by deterministic fractal coding approach to detect the presence of microcalcifications, which are early signs of breast cancer, is presented. The modeled mammogram obtained using fractal encoding method is visually similar to the original image containing microcalcifications, and therefore, when it is taken out from the original mammogram, the presence of microcalcifications can be enhanced. The limitation of fractal image modeling is the tremendous time required for encoding. In the present work, instead of searching for a matching domain in the entire domain pool of the image, three methods based on mean and variance, dynamic range of the image blocks, and mass center features are used. This reduced the encoding time by a factor of 3, 89, and 13, respectively, in the three methods with respect to the conventional fractal image coding method with quad tree partitioning. The mammograms obtained from The Mammographic Image Analysis Society database (ground truth available) gave a total detection score of 87.6%, 87.6%, 90.5%, and 87.6%, for the conventional and the proposed three methods, respectively.

The Social Commitment Of The New Leftist Poets

Hindi

ELEMENTS OF ROMANTICISM IN THE NEW POETRY OF HINDI AND MALAYALAM

HINDI

NEW HINDI POETRY AN AESTHETIC STUDY

HINDI

New studies on the versatile roles of Polyaniline and its composites in polymer based optoelectronic and energy storage devices

From the early stages of the twentieth century, polyaniline (PANI), a well-known and extensively studied conducting polymer has captured the attention of scientific community owing to its interesting electrical and optical properties. Starting from its structural properties, to the currently pursued optical, electrical and electrochemical properties, extensive investigations on pure PANI and its composites are still much relevant to explore its potentialities to the maximum extent. The synthesis of highly crystalline PANI films with ordered structure and high electrical conductivity has not been pursued in depth yet. Recently, nanostructured PANI and the nanocomposites of PANI have attracted a great deal of research attention owing to the possibilities of applications in optical switching devices, optoelectronics and energy storage devices. The work presented in the thesis is centered around the realization of highly conducting and structurally ordered PANI and its composites for applications mainly in the areas of nonlinear optics and electrochemical energy storage. Out of the vast variety of application fields of PANI, these two areas are specifically selected for the present studies, because of the following observations. The non-linear optical properties and the energy storing properties of PANI depend quite sensitively on the extent of conjugation of the polymer structure, the type and concentration of the dopants added and the type and size of the nano particles selected for making the nanocomposites. The first phase of the work is devoted to the synthesis of highly ordered and conducting films of PANI doped with various dopants and the structural, morphological and electrical characterization followed by the synthesis of metal nanoparticles incorporated PANI samples and the detailed optical characterization in the linear and nonlinear regimes. The second phase of the work comprises the investigations on the prospects of PANI in realizing polymer based rechargeable lithium ion cells with the inherent structural flexibility of polymer systems and environmental safety and stability. Secondary battery systems have become an inevitable part of daily life. They can be found in most of the portable electronic gadgets and recently they have started powering automobiles, although the power generated is low. The efficient storage of electrical energy generated from solar cells is achieved by using suitable secondary battery systems. The development of rechargeable battery systems having excellent charge storage capacity, cyclability, environmental friendliness and flexibility has yet to be realized in practice. Rechargeable Li-ion cells employing cathode active materials like LiCoO2, LiMn2O4, LiFePO4 have got remarkable charge storage capacity with least charge leakage when not in use. However, material toxicity, chance of cell explosion and lack of effective cell recycling mechanism pose significant risk factors which are to be addressed seriously. These cells also lack flexibility in their design due to the structural characteristics of the electrode materials. Global research is directed towards identifying new class of electrode materials with less risk factors and better structural stability and flexibility. Polymer based electrode materials with inherent flexibility, stability and eco-friendliness can be a suitable choice. One of the prime drawbacks of polymer based cathode materials is the low electronic conductivity. Hence the real task with this class of materials is to get better electronic conductivity with good electrical storage capability. Electronic conductivity can be enhanced by using proper dopants. In the designing of rechargeable Li-ion cells with polymer based cathode active materials, the key issue is to identify the optimum lithiation of the polymer cathode which can ensure the highest electronic conductivity and specific charge capacity possible The development of conducting polymer based rechargeable Li-ion cells with high specific capacity and excellent cycling characteristics is a highly competitive area among research and development groups, worldwide. Polymer based rechargeable batteries are specifically attractive due to the environmentally benign nature and the possible constructional flexibility they offer. Among polymers having electrical transport properties suitable for rechargeable battery applications, polyaniline is the most favoured one due to its tunable electrical conducting properties and the availability of cost effective precursor materials for its synthesis. The performance of a battery depends significantly on the characteristics of its integral parts, the cathode, anode and the electrolyte, which in turn depend on the materials used. Many research groups are involved in developing new electrode and electrolyte materials to enhance the overall performance efficiency of the battery. Currently explored electrolytes for Li ion battery applications are in liquid or gel form, which makes well-defined sealing essential. The use of solid electrolytes eliminates the need for containment of liquid electrolytes, which will certainly simplify the cell design and improve the safety and durability. The other advantages of polymer electrolytes include dimensional stability, safety and the ability to prevent lithium dendrite formation. One of the ultimate aims of the present work is to realize all solid state, flexible and environment friendly Li-ion cells with high specific capacity and excellent cycling stability. Part of the present work is hence focused on identifying good polymer based solid electrolytes essential for realizing all solid state polymer based Li ion cells.The present work is an attempt to study the versatile roles of polyaniline in two different fields of technological applications like nonlinear optics and energy storage. Conducting form of doped PANI films with good extent of crystallinity have been realized using a level surface assisted casting method in addition to the generally employed technique of spin coating. Metal nanoparticles embedded PANI offers a rich source for nonlinear optical studies and hence gold and silver nanoparticles have been used for making the nanocomposites in bulk and thin film forms. These PANI nanocomposites are found to exhibit quite dominant third order optical non-linearity. The highlight of these studies is the observation of the interesting phenomenon of the switching between saturable absorption (SA) and reverse saturable absorption (RSA) in the films of Ag/PANI and Au/PANI nanocomposites, which offers prospects of applications in optical switching. The investigations on the energy storage prospects of PANI were carried out on Li enriched PANI which was used as the cathode active material for assembling rechargeable Li-ion cells. For Li enrichment or Li doping of PANI, n-Butyllithium (n-BuLi) in hexanes was used. The Li doping as well as the Li-ion cell assembling were carried out in an argon filled glove box. Coin cells were assembled with Li doped PANI with different doping concentrations, as the cathode, LiPF6 as the electrolyte and Li metal as the anode. These coin cells are found to show reasonably good specific capacity around 22mAh/g and excellent cycling stability and coulombic efficiency around 99%. To improve the specific capacity, composites of Li doped PANI with inorganic cathode active materials like LiFePO4 and LiMn2O4 were synthesized and coin cells were assembled as mentioned earlier to assess the electrochemical capability. The cells assembled using the composite cathodes are found to show significant enhancement in specific capacity to around 40mAh/g. One of the other interesting observations is the complete blocking of the adverse effects of Jahn-Teller distortion, when the composite cathode, PANI-LiMn2O4 is used for assembling the Li-ion cells. This distortion is generally observed, near room temperature, when LiMn2O4 is used as the cathode, which significantly reduces the cycling stability of the cells.

TU Graz: Course: 707.000 Web Science and Web Technology: Lecture 4: Social Network Analysis

What are fundamental entities in social networks and what information is contained in social graphs? We will discuss some selected concepts in social network analysis, such as one- and two mode networks, prestige and centrality, and cliques, clans and clubs. Readings: Web tool predicts election results and stock prices, J. Palmer, New Scientist, 07 February (2008) [Protected Access] Optional: Social Network Analysis, Methods and Applications, S. Wasserman and K. Faust (1994)

The New Web Literacy

Web 2.0 is sometimes described as the read/write web, giving everyday users the chance to create and share information as well as to consume information created by others. Social media systems are built on this foundation of participation and sharing, but what is the mindset of these users, and are they quite so everyday as we might suppose? The skills and attitudes held by users can be described as their literacy, and there has been a lot of debate over the last few years about how to describe these literacies, and design for them. One field that has been changed radically by this notion is Technology Enhanced Learning (TEL) where a fierce debate has raged about the potential of a new generation of highly literate digital natives, and Edupunks have argued for open and personal systems that challenge traditional models of institutional control. In this session we look at the arguments surrounding digital literacy and examine TEL as an example of how social media can change an application domain.

COMP6037 Seminar 23 10 13: Science, knowledge and technology

Set readings 1. Sismondo S. (2009). The Kuhnian revolution. In An introduction to science and technology studies. p12-22 2. Ben-David J, Sullivan T. (1975) Sociology of science. Annual Review of Sociology p203-21 3. Clarke A, Star SL. (2008) The social worlds framework: a theory/methods package. In Hackett EJ et al. The handbook of science and technology studies. Cambridge MA: MIT Press p113-137 Bonus paper (read if you have time) 4. Mitroff I. (1974). Norms and Counternorms in a Select Group of Apollo Moon Scientists. American Sociological Review 39:79-95 • Aim to ensure that you understand the core arguments of each paper • Look up/note any new terminology (and questions you want to ask) • Think about your critical appraisal of the paper (what are the merits/demerits of the argument, evidence etc) In the seminar we will spend about 5 minutes talking about each paper, and then - building on the two lectures - discuss how these ideas might be used to think about the Web and Web Science. At the end there will be some time for questions and a chance to note your key learning points.

Methodology for measuring the impact of mobile technology change from 2nd to 3th generation percerved by users of smes in Barranquilla

This article presents the results of a research project undertaken to obtain a Masters inBusiness Administration from the Business School at the Universidad del Norte, whosepurpose was to identify and test a methodology to measure the impact exerted by thechange from 2nd to 3rd generation mobile tech, based on the perception of users belongingto Barranquilla SME, motivated by the influence of technological changes in behavior andthe knowledge creation among society members, and the importance it has taken to thesurvival of organizations the adoption of applications for process automation, web-basedapplications, voice, data and video that allow the development of competitive advantages,based on information and creativity for new and better products or services.

Estrategias de mercadeo online para el lanzamiento de la marca Rio Technology® en Colombia

RIO TECHNOLOGY SAS es una empresa que lleva 11 años en el mercado de la distribución al por mayor de tecnología a todo nivel y suministros para oficina en Bogotá y en algunas otras ciudades del país. Fue constituida formalmente en el año 2001 ante la cámara de comercio de Bogotá como una sociedad anónima, y en el año 2010 cambió su tipo de sociedad, y se convirtió en sociedad por acciones simplificada, aprovechando los beneficios que este tipo de sociedad comercial brinda a las empresas medianas y pequeñas en Colombia. La idea de este proyecto nace porque desde Julio del año 2013, la marca RIO® se encuentra registrada, lo que genera grandes inquietudes acerca del cómo poder aprovechar esta situación para que la empresa RIO TECHNOLOGY se dé a conocer en el mercado y lograr un mayor crecimiento de la misma mediante la promoción y fortalecimiento de su marca, generando mayores utilidades. El mercadeo online podría ser una excelente alternativa para lanzar la marca RIO® al mercado; usando las redes sociales, por ejemplo, pues estas han sido creadas para conectar personas, grupos, páginas, etc. Y además son un medio de comunicación muy efectivo, por lo que la empresa RIO TECHNOLOGY podría estar en contacto permanente y cercano con sus clientes, dando a conocer en todo momento su marca RIO® mediante estrategias promocionales. En la actualidad, las redes sociales han significado una gran oportunidad tanto para las grandes empresas como para las Pymes; pues por medio de ellas se llega a una gran cantidad de personas en cuestión de segundos, con lo cual, usando estrategias eficientes, se logran resultados potenciales que se ven reflejados en un fortalecimiento de marca. El objetivo de este proyecto es presentar a RIO TECHNOLOGY un plan estratégico de mercadeo online para lanzar y fortalecer su marca. Se busca que la empresa mejore potencialmente el nivel de sus ventas y comience a posicionar su marca en el mercado.

100 ideas for teaching design and technology. '100 ideas para el diseño de la enseñanza y la tecnología'.

Forma parte de una serie que aporta ideas para la enseñanza, el aprendizaje y la evaluación de distintas materias en las escuelas secundarias. Este texto se centra en el Diseño y la Tecnología y se divide en ocho secciones que abarcan: los motivos para su inclusión en el curriculo nacional del Reino Unido y el lugar que ocupa en él y en el marco de una educación global, la utilización del diseño y la tecnología, la estructuración de su aprendizaje y de la enseñanza según los tipos de estudiantes y alumnos, así como, ideas para las evaluaciónes. La última sección analiza los estilos de aprendizaje, la participación de los padres y el fomento de la autoestima.

English in the digital age : Information and Communications Technology (ICT) and the teaching of English.

Muestra cómo la aplicación de las Tecnologías de la Información y de la Comunicación (TIC) mejoran la enseñanza y el aprendizaje de la lengua inglesa, enriquecen las habilidades de los alumnos e, introducen nuevos métodos educativos. Los estudios de varios colaboradores de Europa, Australia y América del Norte, consideran que tanto la utilización del material audiovisual tradicional: videos, películas, cintas de audio, cómo la de recursos más recientes: juegos de ordenador, recursos en línea, son materiales valiosos para la práctica educativa.

ICT and literacy : information and communication technology, media, reading and writing.

Se examina la alfabetización en relación con una amplia variedad de nuevas tecnologías y medios de comunicación, especialmente, los llamados 'libros que hablan', el correo electrónico, la edición en video y los materiales multimedia y 'en línea'. En cada caso, los diferentes autores se basan en las investigaciones más recientes para explicar las implicaciones que suponen para la práctica educativa y la política. En este proceso, muestran la necesidad de reflexionar conjuntamente todos aquellos que proporcionan educación, orientación y recursos a los jóvenes.

Sounds like a good idea : using audio technology in the classroom.

La generación actual de estudiantes está familiarizada con medios tecnológicos del tipo: MP3, podcasts, descargas, redes sociales, teléfonos móviles, etc, por ello, el autor del texto considera que el profesorado debe conocer la tecnología audio y su uso para la enseñanza en clase. Así, a los docentes se les proporcionan consejos prácticos para la grabación, edición y mezcla de audio, sobre la elección de equipos, y se les muestra, también, que es un medio para involucrar a los alumnos, de primaria y de secundaria, en el aprendizaje y, también, para el desarrollo de otras habilidades necesarias para su vida fuera de la escuela.